阅读说明：本技术 农业用作业车辆的变速器的控制装置及农业用作业车辆的变速器的控制方法 (Control device for transmission of agricultural work vehicle and control method for transmission of agricultural work vehicle ) 是由 刘知勋 李振雄 申玉植 曹凤辰 于 2019-09-20 设计创作，主要内容包括：本发明涉及农业用作业车辆的变速器的控制装置以及控制方法,所述变速器包括前进/后退变速部的前进/后退离合器和行驶变速部的行驶离合器,所述前进/后退变速部对由发动机产生的驱动执行前进/后退变速,所述行驶变速部对由所述发动机产生的驱动执行行驶变速。(The present invention relates to a control device and a control method for a transmission of an agricultural utility vehicle, the transmission including a forward/reverse clutch of a forward/reverse transmission portion that performs forward/reverse transmission for drive generated by an engine and a travel clutch of a travel transmission portion that performs travel transmission for drive generated by the engine.)

1. A control method of a transmission of an agricultural utility vehicle, the transmission including a forward/reverse clutch of a forward/reverse speed change portion that performs forward/reverse speed change on drive generated by an engine and a travel clutch of a travel speed change portion that performs travel speed change on drive generated by the engine, characterized by comprising:

confirming an operation state of an operation unit including a shift lever for forward/reverse shift control, a travel operation mechanism for travel control, and a clutch operation mechanism for disengagement control of a main clutch of the forward/reverse clutch and the travel clutch, in a state where the agricultural work vehicle in which the engine is started is stationary;

a step of controlling the transmission to a travel standby mode in which the agricultural work vehicle is kept stationary, based on a result of confirmation of an operation state of the operation unit, in a state in which the agricultural work vehicle in which the engine is started is stationary;

confirming an operation state of the travel operation mechanism in the travel standby mode; and

a step of controlling the transmission to a running mode in which the agricultural utility vehicle runs, if it is confirmed in the running standby mode that the running operation means is in a running operation state in which the agricultural utility vehicle runs;

the step of confirming the operation state of the operation part includes:

confirming whether the shift lever is in a forward/reverse operation state for advancing or reversing the agricultural work vehicle or a neutral operation state for not advancing or reversing the agricultural work vehicle;

confirming whether the travel operation means is in the travel operation state or a travel release state in which the agricultural work vehicle is not caused to travel; and

a step of confirming whether the clutch operating mechanism is in a disengagement operating state for disengaging the engagement of the main clutch or an engagement operating state for engaging the main clutch;

the step of controlling the transmission to the running standby mode includes: a step of shifting to the travel standby mode while maintaining the engagement of the main clutch when it is confirmed that the shift lever is in the forward/reverse operation state, the travel operation mechanism is in the travel released state, and the clutch operation mechanism is in the engaged operation state,

in the step of confirming the operation state of the travel operation mechanism in the travel standby mode, confirming whether the travel operation mechanism is in the travel operation state or the travel release state in the travel standby mode,

the step of controlling the transmission to the running mode includes:

a step of controlling the transmission to a normal travel mode in which the agricultural utility vehicle travels in accordance with an operation degree of the acceleration operation mechanism, when it is confirmed that the acceleration operation mechanism of the travel operation mechanism is in an acceleration operation state in which the agricultural utility vehicle is accelerated; and

and a step of controlling the transmission to an idle running mode in which the agricultural work vehicle runs with the engine idling, when it is confirmed that the acceleration operation mechanism is in an acceleration release state in which the agricultural work vehicle is not accelerated.

2. The method of controlling a transmission of an agricultural work vehicle according to claim 1,

in the step of shifting to the running standby mode,

maintaining release of engagement of the forward/reverse clutch when the forward/reverse clutch is the main clutch, thereby shifting to the running standby mode,

when the running clutch is the main clutch, release of engagement of the running clutch is maintained, thereby shifting to the running standby mode.

3. The method of controlling a transmission of an agricultural work vehicle according to claim 1,

the step of confirming whether the travel operation mechanism is in the travel operation state or the travel release state includes: a step of confirming whether the acceleration operating mechanism is in the acceleration operating state or the acceleration release state,

in the step of shifting to the running standby mode, if it is confirmed that the shift lever is in the forward/reverse operation state, the accelerator operation mechanism is in the accelerator release state, and the clutch operation mechanism is in the engagement operation state, the shift is shifted to the running standby mode.

4. The control method of a transmission for an agricultural use vehicle according to claim 3,

the step of confirming the operation state of the travel operating mechanism in the travel standby mode includes: a step of confirming whether the acceleration operating mechanism is in the acceleration operating state or the acceleration released state in the running standby mode,

the step of controlling the transmission to the running mode includes: and engaging the main clutch when it is confirmed that the accelerator operation mechanism is in the accelerator operation state in the travel standby mode.

5. The method of controlling a transmission of an agricultural work vehicle according to claim 4,

in the step of controlling the transmission to the normal running mode, if it is confirmed that the accelerator operation mechanism is in the accelerator operation state with the main clutch engaged, the transmission is controlled to the normal running mode,

in the step of controlling the transmission to the idle running mode, the transmission is controlled to the idle running mode if it is confirmed that the acceleration operation mechanism is in the acceleration release state while the main clutch is engaged.

6. The method of controlling a transmission of an agricultural work vehicle according to claim 1,

the step of confirming whether the travel operation mechanism is in the travel operation state or the travel release state includes:

confirming whether the acceleration operation mechanism is in the acceleration operation state or the acceleration release state; and

a step of confirming whether a brake pedal provided to the travel operation means is in a braking state in which a travel speed of the agricultural work vehicle is reduced or in a non-braking state in which the travel speed of the agricultural work vehicle is not reduced,

in the step of shifting to the running standby mode, if it is confirmed that the shift lever is in the forward/reverse operation state, the accelerator operation mechanism is in the accelerator release state, the brake pedal is in the braking state, and the clutch operation mechanism is in the engagement operation state, the shift to the running standby mode is performed.

7. The method of controlling a transmission of an agricultural work vehicle according to claim 6,

the step of confirming the operation state of the travel operating mechanism in the travel standby mode includes: a step of confirming whether the brake pedal is in the braking state or the non-braking state in the running standby mode,

the step of controlling the transmission to the running mode includes: and a step of engaging the main clutch when it is confirmed that the brake pedal is in the non-braking state in the travel standby mode.

8. The control method of a transmission for an agricultural use vehicle according to claim 7,

in the step of controlling the transmission to the normal running mode, if it is confirmed that the accelerator operation mechanism is in the accelerator operation state with the main clutch engaged, the transmission is controlled to the normal running mode,

in the step of controlling the transmission to the idle running mode, the transmission is controlled to the idle running mode if it is confirmed that the acceleration operation mechanism is in the acceleration release state while the main clutch is engaged.

9. The method of controlling a transmission of an agricultural work vehicle according to claim 1,

in the step of shifting to the running standby mode, shifting to the running standby mode is performed by engaging or maintaining engagement of any one of a first running clutch and a second running clutch, the first running clutch being connected to at least one of a first forward speed change mechanism and a first backward speed change mechanism of the running speed change portion, or by maintaining release of engagement of any one of the first running clutch and the second running clutch, the second running clutch being connected to at least one of a second forward speed change mechanism and a second backward speed change mechanism of the running speed change portion, and the forward/backward clutch serving as the main clutch is released.

10. A control device of a transmission of an agricultural utility vehicle, the transmission including a forward/reverse clutch of a forward/reverse speed change portion that performs forward/reverse speed change on drive generated by an engine and a travel clutch of a travel speed change portion that performs travel speed change on drive generated by the engine, characterized by comprising:

a reception module that receives operation information of a shift lever, operation information of a travel operation mechanism, and operation information of a clutch operation mechanism from an operation portion including the shift lever for forward/reverse shift control, the travel operation mechanism for travel control, and the clutch operation mechanism for disengagement control of a main clutch of the forward/reverse clutch and the travel clutch;

a confirmation module that confirms from operation information of the shift lever whether the shift lever is in a forward/reverse operation state for advancing or reversing the agricultural work vehicle or a neutral operation state for not advancing or reversing the agricultural work vehicle, confirms from operation information of the travel operation mechanism whether the travel operation mechanism is in a travel operation state for traveling the agricultural work vehicle or a travel release state for not traveling the agricultural work vehicle, and confirms from operation information of the clutch operation mechanism whether the clutch operation mechanism is in a release engagement operation state for releasing engagement of the main clutch or an engagement operation state for engaging the main clutch; and

a control module that controls the transmission to any one of a travel standby mode that keeps the agricultural utility vehicle in which the engine is started stationary, a general travel mode that causes the agricultural utility vehicle to travel in accordance with an operation of an acceleration operation mechanism provided in the travel operation mechanism, and an idle travel mode that causes the agricultural working vehicle to travel in a state where the engine is idling, based on a result of the confirmation by the confirmation module,

the control module controls the transmission to the travel standby mode when it is confirmed that the shift lever is in the forward/reverse operation state, the travel operation mechanism is in the travel release state, and the clutch operation mechanism is in the engagement operation state in a state where the agricultural work vehicle in which the engine is started is stationary.

11. The control device for a transmission of an agricultural work vehicle according to claim 10,

the receiving module receives operation information of the acceleration operating mechanism,

the confirmation module confirms whether the acceleration operation mechanism is in an acceleration operation state that accelerates the agricultural utility vehicle or an acceleration release state that does not accelerate the agricultural utility vehicle,

when it is confirmed that the shift lever is in the forward/reverse operation state, the acceleration operation mechanism is in the acceleration release state, and the clutch operation mechanism is in the engagement operation state in a state where the agricultural work vehicle in which the engine is started is stationary, the control module maintains the release of the engagement of the main clutch, and controls the transmission to the running standby mode.

12. The control device for a transmission of an agricultural work vehicle according to claim 11,

the control module controls the transmission to engage the main clutch if it is confirmed in the running standby mode that the accelerator operation mechanism is in the accelerator operation state,

the control module controls the transmission to the normal travel mode if it is confirmed that the accelerator operation mechanism is in the accelerator operation state with the main clutch engaged,

the control module controls the transmission to the idle running mode if it is confirmed that the accelerator operation mechanism is in the accelerator released state in a state where the main clutch is engaged.

13. The control device for a transmission of an agricultural work vehicle according to claim 10,

the receiving module receives operation information of a brake pedal of the running operation mechanism,

the confirmation module confirms whether the brake pedal is in a braking state in which a travel speed of the agricultural work vehicle is reduced or in a non-braking state in which the travel speed of the agricultural work vehicle is not reduced,

when it is confirmed that the shift lever is in the forward/reverse operation state, the accelerator operation mechanism is in the accelerator release state, the brake pedal is in the brake state, and the clutch operation mechanism is in the engagement operation state in a state where the agricultural work vehicle in which the engine is started is stationary, the control module holds the release of the engagement of the main clutch, and controls the transmission to the running standby mode.

14. The control device for a transmission of an agricultural work vehicle according to claim 13,

the control module controls the transmission to engage the main clutch if it is confirmed that the brake pedal is in the non-braking state in the running standby mode,

the control module controls the transmission to the normal travel mode if it is confirmed that the accelerator operation mechanism is in the accelerator operation state with the main clutch engaged,

the control module controls the transmission to the idle running mode if it is confirmed that the accelerator operation mechanism is in the accelerator released state in a state where the main clutch is engaged.

15. The control device for a transmission of an agricultural work vehicle according to claim 10,

in the case where the transmission is controlled to the running standby mode,

the control module controls the transmission to engage or maintain engagement of any one of a first travel clutch and a second travel clutch, and to maintain release of engagement of the forward/reverse clutch as the main clutch, wherein the first travel clutch is connected to at least one of a first forward speed change mechanism and a first reverse speed change mechanism provided in the travel speed change portion, and the second travel clutch is connected to at least one of a second forward speed change mechanism and a second reverse speed change mechanism provided in the travel speed change portion.

Technical Field

The present invention relates to a control device and a control method for controlling a transmission of an agricultural utility vehicle.

Background

An agricultural work vehicle is a vehicle for cultivating crops required for human life using land. For example, a Combine (Combine), a Tractor (Tractor), and the like belong to agricultural industrial vehicles. The harvester performs an operation of mowing and threshing crops such as rice, barley, wheat, soybeans, and the like. Tractors use traction to perform the work required to grow crops. Such agricultural utility vehicles include transmissions to adjust torque, speed, etc. as needed during operation.

A transmission of a general car realizes an Idle running mode in which the car runs slowly at a predetermined running speed even in a state where a driver does not depress an accelerator pedal by a Torque converter (Idle). Even if the transmission is controlled to the idle running mode, the car may not run any more and remain stationary while the driver brakes with the torque converter.

However, prior art transmissions for agricultural use as industrial vehicles do not use torque converters. Therefore, when the agricultural work vehicle that has been started is directly shifted to the idle running mode only by the forward or reverse operation of the shift lever in a state where the agricultural work vehicle is stationary, even if the driver brakes, the agricultural work vehicle cannot travel while remaining stationary due to the large running power (Torque) of the agricultural work vehicle. Therefore, the transmission of the agricultural work vehicle of the related art is shifted to the idle running mode to run the agricultural utility vehicle in a situation other than the intention of the driver, and therefore, there is a problem in that the driving difficulty of the agricultural utility vehicle is increased and the risk of causing a safety accident is high.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a control device for a transmission of an agricultural work vehicle and a control method for a transmission of an agricultural work vehicle, which can prevent a shift to an idle running mode only by a forward or reverse operation of a shift lever.

Means for solving the problems

In order to solve the above-described problems, the present invention may include the following configurations.

The control device of a transmission of an agricultural utility vehicle of the present invention, the transmission including a forward/reverse clutch of a forward/reverse transmission portion that performs a forward/reverse shift on drive generated by an engine and a travel clutch of a travel transmission portion that performs a travel shift on drive generated by the engine, may include: a reception module that receives operation information of a shift lever, operation information of a travel operation mechanism, and operation information of a clutch operation mechanism from an operation portion including the shift lever for forward/reverse shift control, the travel operation mechanism for travel control, and the clutch operation mechanism for disengagement control of a main clutch of the forward/reverse clutch and the travel clutch; a confirmation module that confirms from operation information of the shift lever whether the shift lever is in a forward/reverse operation state for advancing or reversing the agricultural work vehicle or a neutral operation state for not advancing or reversing the agricultural work vehicle, confirms from operation information of the travel operation mechanism whether the travel operation mechanism is in a travel operation state for traveling the agricultural work vehicle or a travel release state for not traveling the agricultural work vehicle, and confirms from operation information of the clutch operation mechanism whether the clutch operation mechanism is in a release engagement operation state for releasing engagement of the main clutch or an engagement operation state for engaging the main clutch; and a control module that controls the transmission to any one of a travel standby mode that keeps the agricultural utility vehicle in which the engine is started stationary, a general travel mode that causes the agricultural utility vehicle to travel in accordance with an operation of an acceleration operation mechanism provided in the travel operation mechanism, and an Idle travel mode that causes the agricultural working vehicle to travel in a state where the engine is idling (Idle), based on a result of the confirmation by the confirmation module.

In the control device for a transmission of an agricultural work vehicle according to the present invention, the control module may control the transmission to the running standby mode when it is confirmed that the shift lever is in the forward/reverse operation state, the running operation mechanism is in the running release state, and the clutch operation mechanism is in the engagement operation state in a state where the agricultural work vehicle in which the engine is started is stationary.

A control method of a transmission of an agricultural utility vehicle of the present invention, the transmission including a forward/reverse clutch of a forward/reverse transmission portion that performs a forward/reverse shift on drive generated by an engine and a travel clutch of a travel transmission portion that performs a travel shift on drive generated by the engine, includes: confirming an operation state of an operation unit including a shift lever for forward/reverse shift control, a travel operation mechanism for travel control, and a clutch operation mechanism for disengagement control of a main clutch of the forward/reverse clutch and the travel clutch, in a state where the agricultural work vehicle in which the engine is started is stationary; a step of controlling the transmission to a travel standby mode in which the agricultural work vehicle is kept stationary, based on a result of confirmation of an operation state of the operation unit, in a state in which the agricultural work vehicle in which the engine is started is stationary; confirming an operation state of the travel operation mechanism in the travel standby mode; and a step of controlling the transmission to a running mode in which the agricultural utility vehicle runs, if it is confirmed in the running standby mode that the running operation means is in a running operation state in which the agricultural utility vehicle runs.

In the control method of a transmission of an agricultural utility vehicle of the present invention, the step of confirming the operation state of the operation portion may include: confirming whether the shift lever is in a forward/reverse operation state for advancing or reversing the agricultural work vehicle or a neutral operation state for not advancing or reversing the agricultural work vehicle; confirming whether the travel operation means is in the travel operation state or a travel release state in which the agricultural work vehicle is not caused to travel; and a step of confirming whether the clutch operating mechanism is in a disengagement operating state for disengaging the engagement of the main clutch or an engagement operating state for engaging the main clutch.

In the control method of a transmission of an agricultural utility vehicle of the present invention, the step of controlling the transmission to the running standby mode may include: and a step of shifting to the travel standby mode while maintaining the engagement of the main clutch when it is confirmed that the shift lever is in the forward/reverse operation state, the travel operation mechanism is in the travel released state, and the clutch operation mechanism is in the engaged operation state.

In the control method of a transmission of an agricultural utility vehicle according to the present invention, in the step of confirming the operation state of the travel operating mechanism in the travel standby mode, it may be confirmed whether the travel operating mechanism is in the travel operation state or the travel release state in the travel standby mode.

In the control method of a transmission of an agricultural utility vehicle of the present invention, the step of controlling the transmission to the running mode may include: a step of controlling the transmission to a normal travel mode in which the agricultural utility vehicle travels in accordance with an operation degree of the acceleration operation mechanism, when it is confirmed that the acceleration operation mechanism of the travel operation mechanism is in an acceleration operation state in which the agricultural utility vehicle is accelerated; and a step of controlling the transmission to an Idle running mode in which the agricultural work vehicle runs with the engine in an Idle (Idle) state, if it is confirmed that the acceleration operation mechanism is in an acceleration release state in which the agricultural work vehicle is not accelerated.

Effects of the invention

According to the present invention, the following effects can be obtained.

The present invention can control the transmission so that the agricultural work vehicle does not travel only when the shift lever is operated to move forward or backward in a state where the agricultural work vehicle with the engine started is stationary, and therefore, the agricultural work vehicle can be prevented from traveling in a situation other than the intention of the driver, and thus the driving difficulty of the agricultural work vehicle can be reduced, and the occurrence of a safety accident can be prevented.

Drawings

Fig. 1 is a schematic side view showing an example of an agricultural work vehicle.

Fig. 2 to 4 are schematic block diagrams of a transmission control device of an agricultural vehicle according to the present invention.

Fig. 5 to 9 are schematic flowcharts of a transmission control method of the agricultural utility vehicle of the present invention.

Detailed Description

Next, an embodiment of the transmission control device for an agricultural industrial vehicle according to the present invention will be described in detail with reference to the drawings.

Referring to fig. 1 to 3, a transmission control device 1 of an agricultural work vehicle according to the present invention is applied to an agricultural work vehicle 100. The agricultural use vehicle 100 is used to utilize land for growing crops required for human life. For example, the agricultural utility vehicle 100 may be a tractor, combine, or the like.

Before describing the transmission control device 1 for an agricultural work vehicle according to the present invention, the agricultural work vehicle 100 will be described specifically as follows.

The agricultural vehicle 100 may include a vehicle body 110 to which an Engine (not shown) is coupled, a driver seat 120 provided to the vehicle body 110, wheels 130 coupled to the vehicle body 110, an operation portion 140 provided to the driver seat 120, and a transmission 150 coupled to the vehicle body 110.

The operating portion 140 may include a shift lever 141, a travel operating mechanism 142, and a clutch operating mechanism 143.

The shift lever 141 is used for forward/reverse shift control. The shift lever 141 can be brought into a forward/backward operation state for advancing or retracting the agricultural utility vehicle 100. The shift lever 141 can be brought into a neutral operation state for not moving the agricultural utility vehicle 100 forward or backward. The shift lever 141 can be set to the forward/reverse operation state or the neutral operation state by an operation of a driver.

The travel actuator 142 is used for travel control. The travel operation mechanism 142 may be brought into a travel operation state in which the agricultural utility vehicle 100 travels. The travel operation means 142 may be set to a travel cancelled state in which the agricultural vehicle 100 is not caused to travel. The travel operation means 142 is operable by a driver to be brought into the travel operation state or the travel release state.

The travel operator 142 may include an accelerator operator 1421 and a brake pedal 1422.

The acceleration operation mechanism 1421 is used for acceleration control. The acceleration operation mechanism 1421 may be set to an acceleration operation state in which the agricultural work vehicle 100 is accelerated. In a case where the acceleration operating mechanism 1421 is brought into the acceleration operating state to accelerate the agricultural utility vehicle 100, the driving of the engine may be changed in accordance with the degree of operation of the acceleration operating mechanism 1421 to accelerate the agricultural utility vehicle 100. The acceleration operating mechanism 1421 may be set to an acceleration release state in which the agricultural work vehicle 100 is not accelerated. The acceleration operation mechanism 1421 can be set to the acceleration operation state or the acceleration release state by the operation of the driver. The acceleration operating mechanism 1421 may include a hand throttle 14211 that can be operated by the driver's hand and an accelerator pedal 14212 that can be operated by the driver's foot.

The brake pedal 1422 is used for deceleration control. The brake pedal 1422 may be set to a braking state in which the travel speed of the agricultural utility vehicle 100 is reduced. The brake pedal 1422 may be brought into an unbraked state in which the running speed of the agricultural utility vehicle 100 is not reduced. The brake pedal 1422 can be brought into the braking state or the non-braking state by the operation of the driver. The brake pedal 1422 may be operated by a foot of a driver.

The clutch operating mechanism 143 is used for disengagement control of a main clutch 150a (shown in fig. 2) that the transmission 150 has. The main clutch 150a selectively transmits drive according to engagement or non-engagement. If the main clutch 150a is engaged, the main clutch 150a can transmit drive. When the main clutch 150a is disengaged, the main clutch 150a cannot transmit drive. The clutch operating mechanism 143 can be brought into a disengaged operating state for disengaging the main clutch 150 a. The clutch operating mechanism 143 can be brought into an engagement operating state in which the main clutch 150a is engaged. The clutch operating mechanism 143 can be brought into the disengagement operation state or the engagement operation state by an operation of a driver. The clutch operating mechanism 143 may include a clutch pedal 1431 that can be operated by a foot of a driver, and a hand clutch 1432 that can be operated by a hand of the driver. The hand clutch 1432 may be a clutch switch (not shown).

The transmission 150 is used to shift the drive generated by the engine. The transmission control device 1 of the agricultural work vehicle according to the present invention can check the operation state of the operation unit 140 and control the transmission 150 in accordance with the operation state of the operation unit 140. The transmission 150 may include a forward/reverse shift portion 151 and a travel shift portion 152.

The forward/reverse speed changing portion 151 is used to perform a forward/reverse speed change for the drive generated by the engine. The transmission control device 1 for an agricultural working vehicle according to the present invention can check the operation state of the shift lever 141 and control the forward/reverse transmission unit 151 to correspond to the operation state of the shift lever 141. The forward/reverse speed changing portion 151 may include a forward/reverse clutch 1511. The forward/reverse speed changing portion 151 may transmit the driving force, at which the forward/reverse speed changing is performed, to the traveling speed changing portion 152. If the forward/reverse clutch 1511 is engaged, the drive generated by the engine can be transmitted to the traveling transmission portion 152 after the forward/reverse shift is performed. When the engagement of the forward/reverse clutch 1511 is released, the drive generated by the engine is not transmitted to the traveling transmission unit 152. The forward/reverse Clutch 1511 may be implemented by a multiplate Clutch (multiplex Disk Clutch) that selectively transmits drive using friction. In this case, the forward/reverse clutch 1511 may be engaged by bringing a plurality of friction members into contact with each other to transmit drive. The forward/reverse clutch 1511 may be disengaged by spacing a plurality of friction members from each other so as not to transmit drive. On the other hand, the forward/reverse transmission portion 151 may include at least one Gear (Gear) and at least one Sleeve (Sleeve) for forward/reverse transmission.

The forward/reverse speed changing portion 151 may perform a forward/reverse speed change for driving the traveling speed change performed by the traveling speed changing portion 152. In this case, the traveling transmission portion 152 performs a traveling shift on the drive generated by the engine, and the forward/reverse transmission portion 151 performs a forward/reverse shift on the drive on which the traveling shift is performed by the traveling transmission portion 152, and then transmits the drive to the axle (not shown).

The traveling shift portion 152 is configured to perform a traveling shift on the drive received from the engine. The transmission control device 1 for an agricultural working vehicle according to the present invention can check the operation state of the travel operation mechanism 142 and control the travel transmission unit 152 to correspond to the operation state of the travel operation mechanism 142. The running transmission portion 152 may include a running clutch 1521. The traveling shift portion 152 may perform a traveling shift on the drive received from the forward/reverse shift portion 151. When the running clutch 1521 is engaged, the drive received from the forward/reverse transmission unit 151 can be transmitted to the axle after the running shift is performed. When the engagement of the running clutch 1521 is released, the drive received from the forward/reverse transmission unit 151 is not transmitted to the axle. The running clutch 1521 may be implemented by a multi-plate clutch that selectively transmits drive using friction. In this case, the running clutch 1521 can be engaged by bringing a plurality of friction members into contact with each other to transmit drive. The engagement of the running clutch 1521 can be released by spacing a plurality of friction members from each other so as not to transmit drive. The running transmission 152 may include a plurality of running clutches 1521. On the other hand, the traveling transmission portion 152 may include at least one gear and at least one sleeve for traveling transmission.

The traveling transmission unit 152 may transmit the driving force of the traveling transmission to the forward/reverse transmission unit 151. In this case, the traveling transmission portion 152 may perform a traveling shift on the drive generated by the engine, and the forward/reverse transmission portion 151 may perform a forward/reverse shift on the drive on which the traveling shift is performed by the traveling transmission portion 152, and then transmit the same to the axle.

Next, a description will be given with reference to an embodiment in which the forward/reverse speed change portion 151 performs a forward/reverse speed change with respect to the drive generated by the engine, and the traveling speed change portion 152 performs a traveling speed change with respect to the drive received from the forward/reverse speed change portion 152, and then transmits the drive to the axle. Accordingly, those skilled in the art can easily understand an embodiment in which the traveling transmission portion 152 performs a traveling shift on the drive generated by the engine, and the forward/reverse transmission portion 151 performs a forward/reverse shift on the drive received from the traveling transmission portion 152 and then transmits the drive to the axle.

Here, any one of the forward/reverse clutch 1511 and the running clutch 1521 may be the main clutch 150 a. In the case where the forward/reverse clutch 1511 is the main clutch 150a, the clutch operating mechanism 143 may be in the disengagement operation state for disengaging the engagement of the forward/reverse clutch 1511 or the engagement operation state for engaging the forward/reverse clutch 1511. When the running clutch 1521 is the main clutch 150a, the clutch operating mechanism 143 may be set to the disengagement operating state for disengaging the running clutch 1521 or the engagement operating state for engaging the running clutch 1521. Which of the forward/reverse clutch 1511 and the running clutch 1521 is the main clutch 150a may be determined according to the arrangement relationship, connection relationship, and the like of the transmission unit and the peripheral devices included in the transmission 150.

In order to control the transmission 150 of the agricultural work vehicle 100 as described above, the transmission control device 1 of the agricultural work vehicle of the present invention may include a receiving module 2, a confirmation module 3, and a control module 4. The transmission control device 1 of the agricultural work vehicle of the present invention may be incorporated into the vehicle main body 110 (shown in fig. 1).

Referring to fig. 2 and 3, the receiving module 2 is configured to receive operation information from the agricultural utility vehicle 100. The receiving module 2 may receive operation information from the operating part 140. The receiving module 2 may receive operation information from the operating part 140 using wired communication, wireless communication, or the like.

The receiving module 2 may receive operation information of the shift lever 141. The operation information of the shift lever 141 is information as to which of the forward/reverse operation state and the neutral operation state the shift lever 141 is in. The receiving module 2 may provide the confirmation module 3 with the operation information of the shift lever 141.

The receiving module 2 may receive operation information of the travel operation mechanism 142. The operation information of the travel operation mechanism 142 is information on which of the travel operation state and the travel released state the travel operation mechanism 142 is in. The receiving module 2 can provide the operation information of the travel actuator 142 to the confirming module 3.

In the case where the travel actuator 142 includes the acceleration actuator 1421, the receiving module 2 may receive operation information of the acceleration actuator 1421. The operation information of the acceleration operating mechanism 1421 is information on which operating state of the acceleration operating mechanism 1421 is in the acceleration operating state and the acceleration release state. In the case where the acceleration operating mechanism 1421 includes the hand throttle 14211 and the accelerator pedal 14212, the receiving module 2 may receive the operation information of the hand throttle 14211 and the operation information of the accelerator pedal 14212.

In the case where the travel operating mechanism 142 includes the brake pedal 1422, the receiving module 2 may receive operation information of the brake pedal 1422. The operation information of the brake pedal 1422 is information on which of the braking state and the non-braking state the brake pedal 1422 is in.

The receiving module 2 may receive operation information of the clutch operating mechanism 143. The operation information of the clutch operating mechanism 143 is information on which operating state of the clutch operating mechanism 143 is in the disengagement operating state and the engagement operating state. The receiving module 2 may provide the confirmation module 3 with operating information of the clutch operating mechanism 143. In the case where the clutch operating mechanism 143 includes the clutch pedal 1431 and the hand clutch 1432, the receiving module 2 may receive operation information of the clutch pedal 1431 and operation information of the hand clutch 1432.

Referring to fig. 2 and 3, the confirming module 3 is configured to confirm the operation information received by the receiving module 2.

The confirmation module 3 can confirm whether the shift lever 141 is in the forward/reverse operation state or the neutral operation state from the operation information of the shift lever 141. If it is confirmed that the shift lever 141 is in the forward/reverse operation state, the confirmation module 3 may provide a forward/reverse operation signal to the control module 4. If it is confirmed that the shift lever 141 is in the neutral operation state, the confirmation module 3 may provide a neutral operation signal to the control module 4.

The confirmation module 3 may confirm whether the travel operation mechanism 142 is in the travel operation state or the travel release state from the operation information of the travel operation mechanism 142. If it is determined that the travel actuator 142 is in the travel operation state, the determination module 3 may provide a travel operation signal to the control module 4. If it is determined that the travel actuator 142 is in the travel release state, the determination module 3 may provide a travel release signal to the control module 4.

In the case where the travel operation mechanism 142 includes the acceleration operation mechanism 1421, the confirmation module 3 may confirm whether the acceleration operation mechanism 1421 is in the acceleration operation state or the acceleration release state from the operation information of the acceleration operation mechanism 1421. If it is determined that the acceleration operating mechanism 1421 is in the acceleration operating state, the determination module 3 may provide an acceleration operating signal to the control module 4. If it is determined that the acceleration operating mechanism 1421 is in the acceleration release state, the determination module 3 may provide an acceleration release signal to the control module 4.

In the case where the travel operation mechanism 142 includes the brake pedal 1422, the determination module 3 may determine whether the brake pedal 1422 is in the braking state or the non-braking state from operation information of the brake pedal 1422. If it is determined that the brake pedal 1422 is in the braking state, the determination module 3 may provide a braking signal to the control module 4. If it is determined that the brake pedal 1422 is in the non-braking state, the determination module 3 may provide a non-braking signal to the control module 4.

In the case where the confirmation module 3 confirms only the operation state of the acceleration operation mechanism 1421 without confirming the operation state of the brake pedal 1422, the travel released state may be assumed when the acceleration operation mechanism 1421 is in the acceleration released state. In this case, the running operation state may be assumed when the acceleration operation mechanism 1421 is in the acceleration operation state.

In a case where the confirmation module 3 confirms both the operation state of the accelerator operation mechanism 1421 and the operation state of the brake pedal 1422, the travel release state may be assumed when the accelerator operation mechanism 1421 is in the accelerator release state and the brake pedal 1422 is in the brake state. In this case, regardless of the operating state of the accelerator operating mechanism 1421, the running operating state may be assumed when the brake pedal 1422 is in the unbraked state.

The confirmation module 3 may confirm whether the clutch operating mechanism 143 is in the disengagement operating state or the engagement operating state from the operation information of the clutch operating mechanism 143. The confirmation module 3 may provide a disengagement operation signal to the control module 4 if it is confirmed that the clutch operating mechanism 143 is in the disengagement operation state. If it is determined that the clutch operating mechanism 143 is in the engaged operating state, the determination module 3 may provide an engaged operating signal to the control module 4.

Referring to fig. 2 and 3, the control module 4 controls the transmission 150 based on the results confirmed by the confirmation module 3. The control module 4 may control the transmission 150 to any one of a running standby mode, an idle running mode, and a general running mode. The running standby mode is a mode in which the agricultural vehicle 100 in which the engine is started is kept stationary. The Idle running mode is a mode in which the agricultural utility vehicle 100 runs in a state where the engine is idling (Idle). In this case, the agricultural utility vehicle 100 travels at a low travel speed set in advance in a state where the acceleration operating mechanism 1421 is not operated. Accordingly, even if the driver does not operate the hand throttle 14211 and the accelerator pedal 14212, the agricultural utility vehicle 100 can be driven at the predetermined low speed. The general travel mode is a mode in which the agricultural vehicle 100 travels in accordance with the operation of the acceleration operating mechanism 1421. In this case, the agricultural utility vehicle 100 can travel at the driving of the engine and the number of travel speed steps corresponding to the degree to which the acceleration operating mechanism 1421 is operated. Therefore, the driver can cause the agricultural utility vehicle 100 to travel at a desired travel speed by operating at least one of the hand throttle 14211 and the accelerator pedal 14212.

When it is confirmed that the shift lever 141 is in the forward/reverse operation state, the travel operation mechanism 142 is in the travel release state, and the clutch operation mechanism 143 is in the engagement operation state in a state where the agricultural vehicle 100 in which the engine is started is stationary, the control module 4 may control the transmission 150 to the travel standby mode. Therefore, the transmission control device 1 of the agricultural work vehicle according to the present invention can control the transmission 150 in a state where the agricultural work vehicle 100 in which the engine is started is stationary, so that the agricultural work vehicle 100 does not travel only by the shift lever 141 being operated to move forward or backward. In the transmission control device 1 for an agricultural work vehicle according to the present invention, the transmission 150 may be controlled in a state where the agricultural work vehicle 100 in which the engine is started is stationary, so that the agricultural work vehicle 100 does not travel only when the clutch operating mechanism 143 is operated to the engaged operating state. Therefore, the transmission control device 1 of the agricultural work vehicle according to the present invention can prevent the agricultural work vehicle 100 from traveling in a situation other than the intention of the driver, and can reduce the difficulty of driving the agricultural work vehicle 100 and prevent the occurrence of a safety accident. The control module 4 may control the transmission 150 to the running standby mode if the forward/reverse operation signal, the running release signal, and the engagement operation signal are received from the confirmation module 3 in a state where the agricultural utility vehicle 100 in which the engine is started is stationary.

In the case where the control module 4 controls the transmission 150 to the running standby mode, the control module 4 may control the transmission 150 to maintain the engagement release of the main clutch 150 a. That is, in the travel standby mode, even if the clutch operating mechanism 143 is in the engaged operating state, the control module 4 can maintain the engagement release of the main clutch 150 a. Therefore, the control module 4 can keep the agricultural utility vehicle 100, in which the engine is started, in a stationary state in the running standby mode.

For example, in the case where the running clutch 1521 is the main clutch 150a, the control module 4 may control the transmission 150 to maintain the engagement release of the running clutch 1521 in the running standby mode. In this case, since the shift lever 141 is in the forward/reverse operation state in the running standby mode, the control module 4 can control the forward/reverse clutch 1511 to be in an engaged state. Thus, the control module 4 can control the forward/reverse transmission unit 151 to a standby state, that is, a state in which the drive can be immediately received from the forward/reverse transmission unit 151 if the running clutch 1521 is engaged. Therefore, the control module 4 can shorten the time required to switch from the running standby mode to the idle running mode or the general running mode.

For example, in the case where the forward/reverse clutch 1511 is the main clutch 150a, the control module 4 may control the transmission 150 to maintain the engagement release of the forward/reverse clutch 1511 in the running standby mode. In this case, the control module 4 can control the transmission 150 such that the running clutch 1521 is engaged or remains engaged with respect to the running clutch 1521. That is, in the running standby mode, the control module 4 may control the running clutch 1521 to be in an engaged state. Thus, the control module 4 can control the traveling transmission unit 152 to a standby state, that is, a state in which the traveling transmission unit 152 can immediately transmit drive if the forward/reverse clutch 1511 is engaged. Therefore, the control module 4 can shorten the time required to switch from the running standby mode to the idle running mode or the general running mode.

In the case where the forward/reverse clutch 1511 is the main clutch 150a, the running clutch 1521 may be kept disengaged when the agricultural utility vehicle 100 is started, and engaged in the running standby mode. In the case where the control module 4 controls the transmission 150 to the running standby mode, the control module 4 may control the transmission 150 to keep the engagement of the forward/reverse clutch 1511 released and engage the running clutch 1521.

In the case where the forward/reverse clutch 1511 is the main clutch 150a, the running clutch 1521 is engaged when the agricultural implement vehicle 100 is started, and may be kept engaged even in the running standby mode. In the case where the control module 4 controls the transmission 150 to the running standby mode, the control module 4 may also control the transmission 150 to keep the engagement with the forward/reverse clutch 1511 released and to keep the engagement with the running clutch 1521 engaged.

Referring to fig. 2 to 4, in a case where the Transmission 150 is implemented as a Dual Clutch Transmission (DCT) and the forward/reverse Clutch 1511 is implemented as the main Clutch 150a, the control module 4 may control the Transmission 150 to the travel standby mode by controlling the travel speed change portion 152 such that any one of a first travel Clutch 1521a and a second travel Clutch 1521b is engaged or maintaining engagement of any one of the first travel Clutch 1521a and the second travel Clutch 1521 b.

Specific descriptions of the first driving clutch 1521a and the second driving clutch 1521b are as follows.

First, the first drive clutch 1521a is connected to at least one of the first forward shifting mechanism 1522a and the first backward shifting mechanism 1523 a. If first travel clutch 1521a is engaged, drive can be transmitted from first forward transmission mechanism 1522a to first rear transmission mechanism 1523a via first travel clutch 1521 a. When the engagement of the first running clutch 1521a is released, drive cannot be transmitted from the first forward transmission mechanism 1522a to the first reverse transmission mechanism 1523a via the first running clutch 1521 a. The first forward shifting mechanism 1522a may correspond to a main shifting portion, and the first rear shifting mechanism 1523a may correspond to a sub-shifting portion. The first forward shifting mechanism 1522a may correspond to a sub-transmission portion, and the first rear shifting mechanism 1523a may correspond to a main transmission portion. On the other hand, the first drive clutch 1521a may be connected to only one of the first forward shifting mechanism 1522a and the first backward shifting mechanism 1523 a. It is also possible to realize that the first running clutch 1521a is connected to only one of the first forward speed change mechanism 1522a and the first backward speed change mechanism 1523a, so that the drive generated by the engine is transmitted to the axle via the first forward speed change mechanism 1522a and the first backward speed change mechanism 1523a, or is not transmitted to the axle via the first forward speed change mechanism 1522a and the first backward speed change mechanism 1523 a.

Next, the second running clutch 1521b is connected to any one of the second forward speed change mechanism 1522b and the second backward speed change mechanism 1523 b. If second running clutch 1521b is engaged, drive can be transmitted from second forward transmission mechanism 1522b to second reverse transmission mechanism 1523b via second running clutch 1521 b. When the engagement of second running clutch 1521b is released, drive cannot be transmitted from second forward transmission mechanism 1522b to second reverse transmission mechanism 1523b via second running clutch 1521 b. The second forward shifting mechanism 1522b may correspond to a main shifting portion, and the second rear shifting mechanism 1523b may correspond to a sub-shifting portion. The second forward shifting mechanism 1522b may correspond to a range section, and the second rear shifting mechanism 1523b may correspond to a main shifting section. On the other hand, the second running clutch 1521b may be connected to only one of the second forward speed change mechanism 1522b and the second backward speed change mechanism 1523 b. It is also possible to realize that the second running clutch 1521b is connected to only one of the second forward speed change mechanism 1522b and the second backward speed change mechanism 1523b, so that the drive generated by the engine is transmitted to the axle via the second forward speed change mechanism 1522b and the second backward speed change mechanism 1523b, or is not transmitted to the axle via the second forward speed change mechanism 1522b and the second backward speed change mechanism 1523 b.

In the case where the forward/reverse clutch 1511 is the main clutch 150a, the control module 4 may control the traveling transmission unit 152 to maintain the engagement release of the forward/reverse clutch 1511 in the traveling standby mode, and to engage or maintain the engagement of one of the first traveling clutch 1521a and the second traveling clutch 1521b and one of the first traveling clutch 1521a and the second traveling clutch 1521 b. Thus, the control module 4 can control the traveling transmission unit 152 to a standby state, that is, a state in which the drive can be transmitted through either the first traveling clutch 1521a or the second traveling clutch 1521b immediately when the forward/reverse clutch 1511 is engaged. Therefore, in the case where the transmission 150 is implemented as a dual clutch transmission, the control module 4 can also shorten the time required to shift from the running standby mode to the idle running mode or the general running mode.

If it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state in the running standby mode, the control module 4 may control the transmission 150 such that the main clutch 150a is engaged. Thus, the transmission 150 can transmit the drive generated by the engine to the axle. Thus, the agricultural utility vehicle 100 can be started and run. The operation of confirming whether the acceleration operation mechanism 1421 is in the acceleration operation state or the acceleration release state in the travel standby mode may be performed by the confirmation module 3. If the determination module 3 determines that the acceleration operating mechanism 1421 is in the acceleration operating state in the driving standby mode, the determination module 3 may provide the acceleration operating signal to the control module 4. If the control module 4 receives the acceleration operation signal from the confirmation module 3 in the driving standby mode, the control module 4 may engage the main clutch 150 a. On the other hand, if it is confirmed that the accelerator operating mechanism 1421 is in the accelerator off state in the running standby mode, the control module 4 may maintain the engagement of the main clutch 150a to be off.

If it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state while the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the normal travel mode. In the normal running mode, the control module 4 may control the transmission 150 so that the agricultural utility vehicle 100 runs according to the degree of operation of the acceleration operating mechanism 1421. The operation of confirming whether the accelerator operation mechanism 1421 is in the accelerator operation state or the accelerator release state in the state where the main clutch 150a is engaged may be performed by the confirmation module 3. If the determination module 3 determines that the accelerator operation mechanism 1421 is in the accelerator operation state while the master clutch 150a is engaged, the determination module 3 may provide the accelerator operation signal to the control module 4. If the control module 4 receives the acceleration operation signal from the confirmation module 3 in a state where the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the normal travel mode. On the other hand, since the main clutch 150a is in the engaged state as it is confirmed in the running standby mode that the accelerator operation mechanism 1421 is in the accelerator operation state, the control module 4 may control the transmission 150 to the normal running mode if it is confirmed that the accelerator operation state is maintained in the accelerator operation mechanism 1421 in the engaged state of the main clutch 150 a.

If it is confirmed that the acceleration operating mechanism 1421 is in the acceleration released state while the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the idle running mode. In the idle running mode, the control module 4 may control the transmission 150 so that the agricultural utility vehicle 100 runs at the predetermined low-speed running speed in a state where the engine is idling. In this case, the control module 4 may control the transmission 150 to maintain the forward/reverse clutch 1511 and the running clutch 1521 in an engaged state. If the confirmation module 3 confirms that the accelerator operation mechanism 1421 is in the accelerator release state while the main clutch 150a is engaged, the confirmation module 3 may provide the accelerator release signal to the control module 4. The control module 4 may control the transmission 150 to the idle running mode if the acceleration release signal is received from the confirmation module 3 in a state where the main clutch 150a is engaged.

As described above, the transmission control device 1 for an agricultural work vehicle according to the present invention may be implemented to control the transmission 150 in the travel standby mode such that the main clutch 150a is engaged according to the operation state of the travel operation mechanism 142, and control the transmission 150 in the normal travel mode or the idle travel mode according to the operation state of the acceleration operation mechanism 1421 in the state where the main clutch 150a is engaged.

Here, the transmission control device 1 of the agricultural work vehicle according to the modified embodiment of the present invention may control the transmission 150 to the travel standby mode, the normal travel mode, and the idle travel mode in consideration of whether the brake pedal 1422 is in the braking state or the non-braking state. This will be explained in detail below.

First, the receiving module 2 may further receive operation information of the brake pedal 1422 from the operating unit 140. Thus, the receiving module 2 can receive the operation information of the shift lever 141, the operation information of the accelerator operation mechanism 1421, the operation information of the brake pedal 1422, and the operation information of the clutch operation mechanism 143 from the operation unit 140.

Next, the determination module 3 may additionally determine whether the brake pedal 1422 is in the braking state or the non-braking state. Thus, the confirmation module 3 can confirm whether the shift lever 141 is in the forward/reverse operation state or the neutral operation state, whether the accelerator operation mechanism 1421 is in the accelerator operation state or the accelerator release state, whether the brake pedal 1422 is in the braking state or the unbraked state, and whether the clutch operation mechanism 143 is in the disengagement operation state or the engagement operation state.

Next, when it is confirmed that the shift lever 141 is in the forward/reverse operation state, the travel operation mechanism 1421 is in the accelerator release state, the brake pedal 1422 is in the brake state, and the clutch operation mechanism 143 is in the engagement operation state in a state where the agricultural vehicle 100 in which the engine is started is stationary, the control module 4 may control the transmission to the travel standby mode while maintaining the engagement release state with respect to the main clutch 150 a.

Next, in the driving standby mode, if it is confirmed that the brake pedal 1422 is in the non-braking state, the control module 4 may control the transmission 150 such that the main clutch 150a is engaged. In the driving standby mode, the determination module 3 may determine that the brake pedal 1422 is in the non-braking state.

Then, in a state where the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the normal running mode or the idle running mode according to whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration release state. Here, it is possible to confirm by the confirmation module 3 whether the accelerator operation mechanism 1421 is in the accelerator operation state or the accelerator release state in the state where the main clutch 150a is engaged.

If it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state while the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the normal travel mode.

If it is confirmed that the acceleration operating mechanism 1421 is in the acceleration release state while the main clutch 150a is engaged, the control module 4 may control the transmission 150 to the idle running mode. On the other hand, since the acceleration operating mechanism 1421 is kept in the acceleration released state from the travel standby mode, the control module 4 may control the transmission 150 to the idle travel mode if it is confirmed that the acceleration operating mechanism 1421 is kept in the acceleration released state while the main clutch 150a is engaged.

As described above, the transmission control device 1 of the agricultural work vehicle according to the modified embodiment of the present invention may be implemented such that the transmission 150 is controlled such that the main clutch 150a is engaged according to the operation state of the brake pedal 1422 in the running standby mode, and the transmission 150 is controlled such that the normal running mode or the idle running mode is performed according to the operation state of the accelerator operation mechanism 1421 in the state where the main clutch 150a is engaged.

Next, an embodiment of a transmission control method for an agricultural work vehicle according to the present invention will be described in detail with reference to the drawings.

Referring to fig. 1 to 6 and 8, the transmission control method of the agricultural work vehicle according to the present invention is used to control a transmission 150 included in the agricultural work vehicle 100. The transmission control method of the agricultural work vehicle according to the present invention can be executed by the transmission control device 1 of the agricultural work vehicle according to the present invention described above. The transmission control method of an agricultural work vehicle of the present invention may include the following steps.

First, the operation state of the operation unit 140 is confirmed (S10). This step (S10) can be achieved by confirming the operation state of the shift lever 141, the operation state of the travel operation mechanism 142, and the operation state of the clutch operation mechanism 143 in a state where the agricultural utility vehicle 100 in which the engine is started is stationary. The step of confirming the operation state of the operation part (S10) may be performed by the confirmation module 3. The confirmation module 3 may confirm the operation state of the operation part 140 using the operation information received from the reception module 2. The step of confirming the operation state of the operation part (S10) may include: a step (S11) of confirming whether the shift lever 141 is in the forward/reverse operation state or the neutral operation state; a step (S12) of confirming whether the travel operation mechanism 142 is in the travel operation state or the travel cancelled state; and a step (S13) of confirming whether the clutch operating mechanism 143 is in the disengagement operating state or the engagement operating state.

Next, the transmission 150 is controlled to the running standby mode (S20). This step (S20) can be implemented by controlling the transmission 150 to the running standby mode in accordance with the result of checking the operating state of the operating unit 140 while the agricultural work vehicle in which the engine is started is stationary. The step S20 of controlling the transmission to the running standby mode may be implemented by: when it is confirmed that the shift lever 141 is in the forward/reverse operation state, the travel operation mechanism 142 is in the travel release state, and the clutch operation mechanism 143 is in the engagement operation state in a state where the agricultural work vehicle in which the engine is started is stationary, the transmission 150 is controlled to the travel standby mode. When the step of controlling the transmission to the running standby mode is executed (S20), the agricultural utility vehicle 100 can be kept in a stationary state even if the shift lever 141 is in the forward/reverse operation state and the clutch operating mechanism 143 is in the engaged operation state.

Therefore, the transmission control method of the agricultural work vehicle according to the present invention can control the transmission 150 so that the agricultural work vehicle 100 does not travel only when the shift lever 141 is operated to move forward or backward in a state where the agricultural work vehicle 100 in which the engine is started is stationary. In the transmission control method for an agricultural work vehicle according to the present invention, the transmission 150 may be controlled so that the agricultural work vehicle 100 does not travel only when the clutch operating mechanism 143 is operated to the engaged operating state in a state where the agricultural work vehicle 100 in which the engine is started is stationary. Therefore, the transmission control method of the agricultural work vehicle according to the present invention can prevent the agricultural work vehicle 100 from traveling in a situation other than the intention of the driver, and thus can reduce the difficulty of driving the agricultural work vehicle 100 and prevent the occurrence of a safety accident.

The step of controlling the transmission to the running standby mode (S20) may be performed by the control module 4. The control module 4 may control the transmission 150 to the travel standby mode if the forward/reverse operation signal, the travel release signal, and the engagement operation signal are received from the confirmation module 3.

Next, the operation state of the travel operating mechanism 142 is confirmed in the travel standby mode (S30). This step (S30) may be implemented by confirming whether the travel operating mechanism 142 is in the travel operating state or the travel released state in the travel standby mode. The step of confirming the operation state of the running operating mechanism in the running standby mode (S30) may be performed by the confirmation module 3.

Next, the transmission 150 is controlled to the running mode (S40). This step (S40) may be implemented by controlling the transmission 150 to the travel mode in which the agricultural utility vehicle travels when it is confirmed in the travel standby mode that the travel operation mechanism 142 is in the travel operation state. The step of controlling the transmission to the running mode (S40) may be performed by the control module 4.

The step of controlling the transmission to the driving mode (S40) may include the step of controlling the transmission to a general driving mode (S41) and the step of controlling the transmission to an idle driving mode (S42).

The step (S41) of controlling the transmission to the normal running mode may be implemented by controlling the transmission 150 to the normal running mode if it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state. The step of controlling the transmission to the general travel mode (S41) may be performed by the control module 4. If the control module 4 receives the acceleration operation signal, the control module 4 may control the transmission 150 to the general travel mode. If the step of controlling the transmission to the normal running mode is performed (S41), the agricultural utility vehicle 100 can run according to the degree of operation of the accelerator operation mechanism 1421 after the start of the vehicle. Thus, the driver can cause the agricultural utility vehicle 100 to travel at a desired travel speed by operating the acceleration operating mechanism 1421.

The step of controlling the transmission to the idle running mode (S42) may be implemented by controlling the transmission 150 to the idle running mode if it is confirmed that the acceleration operating mechanism 1421 is in the acceleration release state. The step of controlling the transmission to the idle driving mode (S42) may be performed by the control module 4. If the control module 4 receives the acceleration release signal, the transmission 150 may be controlled to the idle driving mode. If the step of controlling the transmission to the idle running mode is performed (S42), the agricultural utility vehicle 100 can run at the low running speed set in advance without operating the acceleration operating mechanism 1421. Accordingly, even if the driver does not operate the hand throttle 14211 and the accelerator pedal 14212, the agricultural utility vehicle 100 can be caused to travel at the low speed set in advance.

Referring to fig. 1 to 6 and 8, the step of controlling the transmission to the driving standby mode (S20) may include the step of shifting to the driving standby mode (S21).

The step of shifting to the running standby mode (S21) may be implemented by shifting to the running standby mode while maintaining the engagement release of the main clutch 150 a. In this case, in the step (S21) of shifting to the running standby mode, even if it is confirmed that the clutch operating mechanism 143 is in the engaged operating state while the agricultural utility vehicle 100 in which the engine is started is stationary, the engagement of the main clutch 150a can be released. The step of shifting to the running standby mode (S21) may be performed by the control module 4. When the forward/reverse clutch 1511 is the main clutch 150a, in the step (S21) of shifting to the running standby mode, even if the shift lever 141 is in the forward/reverse operation state and the clutch operation mechanism 143 is in the engaged operation state, the engagement of the forward/reverse clutch 1511 can be kept released. If the running clutch 1521 is the main clutch 150a, the engagement of the running clutch 1521 can be released even if the clutch operating mechanism 143 is in the engaged state in the step (S21) of shifting to the running standby mode. In this case, the step of shifting to the running standby mode (S21) may engage the forward/reverse clutch 1511 in response to the shift lever 141 being in the forward/reverse operation state.

In the case where the transmission 150 is implemented as a dual clutch transmission, the step (S21) of shifting to the running standby mode may be implemented by shifting to the running standby mode in a state where any one of the first running clutch 1521a and the second running clutch 1521b is engaged or any one of the first running clutch 1521a and the second running clutch 1521b is kept engaged. In this case, the forward/reverse clutch 1511 may correspond to the main clutch 150 a. If the forward/reverse clutch 1511 corresponds to the main clutch 150a, the control module 4 may control the transmission unit 150 to maintain the engagement of the forward/reverse clutch 1511 released, and to engage or maintain the engagement of one of the first running clutch 1521a and the second running clutch 1521b, while engaging or maintaining the engagement of one of the first running clutch 1521a and the second running clutch 1521 b.

Referring to fig. 1 to 9, the transmission control method of an agricultural work vehicle according to the present invention may generally include a first embodiment and a second embodiment according to a control manner of controlling the transmission 150 to the normal running mode and the idle running mode. Such a first embodiment and a second embodiment are explained in order with reference to the drawings.

< first embodiment >

Referring to fig. 1 to 7, a transmission control method of an agricultural work vehicle according to a first embodiment of the present invention may be implemented as follows.

First, the step of confirming the operating state of the operating portion (S10) may be implemented by confirming the operating state of the shift lever 141, the operating state of the accelerator operating mechanism 1421, and the operating state of the clutch operating mechanism 143 in a state where the agricultural utility vehicle 100 in which the engine is started is stationary.

In the step of confirming the operation state of the operating part (S10), the step of confirming the operation state of the travel operating mechanism (S12) may include the step of confirming the operation state of the acceleration operating mechanism (S121). The step (S121) of confirming the operating state of the acceleration operating mechanism may be implemented by confirming whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration release state in a state where the agricultural utility vehicle 100 in which the engine is started is stationary. The step of confirming the operating state of the accelerator operating mechanism (S121) may be performed by the confirmation module 3.

Next, the step (S20) of controlling the transmission to the running standby mode may be implemented by controlling the transmission 150 to the running standby mode if it is confirmed that the shift lever 141 is in the forward/reverse operation state, the accelerator operation mechanism 1421 is in the accelerator release state, and the clutch operation mechanism 143 is in the engaged operation state while the agricultural utility vehicle 100 in which the engine is started is stationary. In this case, the step of shifting to the running standby mode (S21) may be executed by shifting to the running standby mode by holding the engagement of the main clutch 150a released if it is confirmed that the shift lever 141 is in the forward/reverse operation state, the accelerator operation mechanism 1421 is in the accelerator release state, and the clutch operation mechanism 143 is in the engaged operation state.

Next, the step of confirming the operation state of the running operating mechanism in the running standby mode (S30) may include the step of confirming the operation state of the acceleration operating mechanism in the running standby mode (S31). The step of confirming the operating state of the acceleration operating mechanism in the running standby mode (S31) may be implemented by confirming whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration released state in the running standby mode. The step of confirming the operating state of the accelerator operating mechanism in the running standby mode (S31) may be performed by the confirmation module 3.

Next, the step of controlling the transmission to the travel mode (S40) may include the step of engaging a main clutch (S43), the step of controlling the transmission to the general travel mode (S41), and the step of controlling the transmission to the idle travel mode (S42).

The step of engaging the main clutch (S43) may be performed by engaging the main clutch 150a when it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state in the driving standby mode (S31). The step of engaging the master clutch (S43) may be performed by the control module 4. If the control module 4 receives the acceleration operation signal from the confirmation module 3 in the driving standby mode, the control module 4 may control the transmission 150 to engage the main clutch 150 a. If the main clutch is engaged, the agricultural utility vehicle 100 can travel at a travel speed corresponding to the degree of operation of the accelerator operation mechanism 1421.

The step of engaging the main clutch (S43) may be performed before the step of controlling the transmission to the general travel mode (S41) and the step of controlling the transmission to the idle travel mode (S42) are performed. The step of engaging the main clutch (S43) may be performed after the step of confirming the operating state of the accelerator operating mechanism in the running standby mode (S31) is performed.

Next, the step of controlling the transmission to the running mode (S40) may include the step of confirming an operation state of the acceleration operating mechanism in a state where the main clutch is engaged (S44).

The step of confirming the operation state of the accelerator operation mechanism in the state where the main clutch is engaged (S44) may be implemented by confirming whether the accelerator operation mechanism 1421 is in the accelerator operation state or the accelerator release state in the state where the main clutch 150a is engaged. The step of confirming the operating state of the accelerator operation mechanism in the state where the main clutch is engaged (S44) may be performed by the confirmation module 3. The confirmation module 3 may confirm whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration release state from the operation information of the acceleration operating mechanism 1421 in the state where the main clutch 150a is engaged.

The step of confirming the operating state of the accelerator operating mechanism with the master clutch engaged (S44) may be performed before the step of controlling the transmission to the general travel mode (S41) and the step of controlling the transmission to the idle travel mode (S42) are performed. The step of confirming the operating state of the accelerator operating mechanism in the state where the main clutch is engaged (S44) may be performed after the step of engaging the main clutch (S43) is performed.

In the transmission control method of the agricultural work vehicle according to the first embodiment of the present invention, the step (S41) of controlling the transmission to the general travel mode and the step (S42) of controlling the transmission to the idle travel mode may be implemented as follows.

The step (S41) of controlling the transmission to the normal running mode may be implemented by controlling the transmission 150 to the normal running mode if it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state with the main clutch 150a engaged. Since it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state in the running standby mode, the main clutch 150a may be in an engaged state. In this case, the step (S41) of controlling the transmission to the normal running mode may be performed by controlling the transmission to the normal running mode if it is confirmed that the accelerator operating mechanism 1421 maintains the accelerator operating state while the main clutch 150a is engaged.

The step (S42) of controlling the transmission to the idle running mode may be implemented by controlling the transmission 150 to the idle running mode if it is confirmed that the acceleration operation mechanism 1421 is in the acceleration release state while the main clutch 150a is engaged.

As described above, in the transmission control method of the agricultural work vehicle according to the first embodiment of the present invention, the transmission 150 is controlled to engage the main clutch 150a in accordance with the operation state of the accelerator operation mechanism 1421 in the running standby mode, and the transmission 150 is controlled to the normal running mode or the idle running mode in accordance with the operation state of the accelerator operation mechanism 1421 in the state where the main clutch 150a is engaged.

< second embodiment >

Referring to fig. 1 to 5, 8, and 9, a transmission control method for an agricultural work vehicle according to a second embodiment of the present invention may be implemented as follows.

First, the step of confirming the operating state of the operating portion (S10) may be implemented by confirming the operating state of the shift lever 141, the operating state of the accelerator operating mechanism 1421, the operating state of the brake pedal 1422, and the operating state of the clutch operating mechanism 143 in a state where the agricultural utility vehicle 100 in which the engine is started is stationary.

In the step of confirming the operating state of the operating part (S10), the step of confirming the operating state of the travel operating mechanism (S12) may include a step of confirming the operating state of the acceleration operating mechanism (S121) and a step of confirming the operating state of a brake pedal (S122). The step of confirming the operating state of the acceleration operating mechanism (S121) may be implemented by confirming whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration release state in a state where the agricultural utility vehicle 100 in which the engine is started is stationary. The step (S122) of confirming the operation state of the brake pedal may be implemented by confirming whether the brake pedal 1422 is in the braking state or the non-braking state in a state where the agricultural utility vehicle 100 in which the engine is started is stationary. The step of confirming the operating state of the accelerator operating mechanism (S121) and the step of confirming the operating state of the brake pedal (S122) may be performed by the confirmation module 3.

Next, the step (S20) of controlling the transmission to the running standby mode may be implemented by controlling the transmission 150 to the running standby mode if it is confirmed that the shift lever 141 is in the forward/reverse operation state, the accelerator operation mechanism 1421 is in the accelerator release state, the brake pedal 1422 is in the brake state, and the clutch operation mechanism 143 is in the engaged operation state while the agricultural utility vehicle 100 in which the engine is started is stationary. In this case, the step (S21) of shifting to the running standby mode may be implemented by maintaining the engagement release of the main clutch 150a when it is confirmed that the shift lever 141 is in the forward/reverse operation state, the accelerator operation mechanism 1421 is in the accelerator release state, the brake pedal 1422 is in the braking state, and the clutch operation mechanism 143 is in the engagement operation state.

Next, the step of confirming the operation state of the running operation means in the running standby mode (S30) may include the step of confirming the operation state of the brake pedal in the running standby mode (S32). The step of confirming the operating state of the brake pedal in the running standby mode (S32) may be implemented by confirming whether the brake pedal 1422 is in the braked state or the unbraked state in the running standby mode. The step of confirming the operating state of the brake pedal in the driving standby mode (S32) may be performed by the confirmation module 3.

Next, the step of controlling the transmission to the travel mode (S40) may include the step of engaging the main clutch (S43), the step of controlling the transmission to the general travel mode (S41), and the step of controlling the transmission to the idle travel mode (S42).

The step of engaging the main clutch (S43) may be performed in such a manner that the main clutch 150a is engaged if it is confirmed that the brake pedal 1422 is in the unbraked state in the driving standby mode (S32). The step of engaging the master clutch (S43) may be performed by the control module 4. If the control module 4 receives the no-brake signal from the confirmation module 3 in the driving standby mode, the control module 4 may control the transmission 150 to engage the main clutch 150 a. If the main clutch is engaged, the agricultural utility vehicle 100 may start running at the predetermined low running speed.

The step of engaging the main clutch (S43) may be performed before the step of controlling the transmission to the general travel mode (S41) and the step of controlling the transmission to the idle travel mode (S42) are performed. The step of engaging the main clutch (S43) may be performed after the step of confirming the operating state of the accelerator operating mechanism in the running standby mode (S31) is performed.

Next, the step of controlling the transmission to the running mode (S40) may include the step of confirming an operation state of the acceleration operating mechanism in a state where the main clutch is engaged (S44).

The step of confirming the operation state of the accelerator operation mechanism in the state where the main clutch is engaged (S44) may be implemented by confirming whether the accelerator operation mechanism 1421 is in the accelerator operation state or the accelerator release state in the state where the main clutch 150a is engaged. The step of confirming the operating state of the accelerator operation mechanism in the state where the main clutch is engaged (S44) may be performed by the confirmation module 3. The confirmation module 3 may confirm whether the acceleration operating mechanism 1421 is in the acceleration operating state or the acceleration release state from the operation information of the acceleration operating mechanism 1421 in the state where the main clutch 150a is engaged.

The step of confirming the operating state of the accelerator operating mechanism with the master clutch engaged (S44) may be performed before the step of controlling the transmission to the general travel mode (S41) and the step of controlling the transmission to the idle travel mode (S42) are performed. The step of confirming the operating state of the accelerator operating mechanism in the state where the main clutch is engaged (S44) may be performed after the step of engaging the main clutch (S43) is performed.

In the transmission control method of the agricultural work vehicle according to the second embodiment of the present invention, the step of controlling the transmission to the general travel mode (S41) and the step of controlling the transmission to the idle travel mode (S42) may be implemented as follows.

The step (S41) of controlling the transmission to the normal running mode may be implemented by controlling the transmission 150 to the normal running mode if it is confirmed that the accelerator operation mechanism 1421 is in the accelerator operation state with the main clutch 150a engaged.

The step (S42) of controlling the transmission to the idle running mode may be implemented by controlling the transmission 150 to the idle running mode if it is confirmed that the acceleration operation mechanism 1421 is in the acceleration release state while the main clutch 150a is engaged. On the other hand, since the acceleration operating mechanism 1421 is kept in the acceleration released state from the travel standby mode, the step (S42) of controlling the transmission to the idle travel mode may be implemented such that, if it is confirmed that the acceleration operating mechanism 1421 is kept in the acceleration released state with the main clutch 150a engaged, the transmission 150 is controlled to the idle travel mode.

As described above, the transmission control method of the agricultural work vehicle according to the second embodiment of the present invention may be implemented such that the transmission 150 is controlled to engage the main clutch 150a according to the operation state of the brake pedal 1422 in the running standby mode, and the transmission 150 is controlled to the normal running mode or the idle running mode according to the operation state of the accelerator operation mechanism 1421 in the state where the main clutch 150a is engaged.

The present invention described above is not limited to the above-described embodiments and drawings, and those skilled in the art will understand that various substitutions, modifications and changes can be made without departing from the scope of the technical idea of the present invention.