阅读说明：本技术 一种自动变速器挡位控制方法、系统及车辆 (Automatic transmission gear control method and system and vehicle ) 是由 向光军 于 2021-06-18 设计创作，主要内容包括：本发明公开一种自动变速器挡位控制方法、系统及车辆,控制自动变速器在驾驶员驻车时先进入空挡,通过自动变速器进入空挡来释放驱动能量,使得变速器驻车机构上无驱动能量。通过本发明的自动变速器挡位控制方法,消除了P挡卡滞拔不出和P挡拔出冲击大和噪音问题,保证了下次顺畅行车,提升了用户体验度,减少了用户抱怨。(The invention discloses a method and a system for controlling gears of an automatic transmission and a vehicle. By the automatic transmission gear control method, the problems of no P gear clamping pull-out, high P gear pull-out impact and noise are solved, the next smooth driving is ensured, the user experience is improved, and the complaints of users are reduced.)

1. A method of controlling a gear of an automatic transmission, comprising the steps of:

(S1) in response to detecting that the electronic shifter is in the P range position, performing the step (S2);

(S2) the transmission controller judging whether the vehicle speed is 0; if yes, go to execute step (S3); otherwise, the flow is ended;

(S3) the transmission controller judging whether the automatic transmission is in neutral; if yes, go to execute step (S7); otherwise, go to execute step (S4);

(S4) the electronic shifter issuing a neutral request;

(S5) controlling the transmission to execute an in-neutral command;

(S6) the transmission controller judges whether the transmission executes the neutral gear command or not, if so, the execution step is carried out (S7); otherwise, go to execute step (S5);

(S7) the electronic shifter issues a P range request.

2. An automatic transmission gear control system comprising an electronic shifter (7), a transmission (8) and a transmission controller (9) for controlling the transmission (8) to execute a request of the electronic shifter, the electronic shifter (7) and the transmission controller (9) being in communication via a CAN bus, characterized in that the automatic transmission gear control system is capable of performing the steps of the automatic transmission gear control method according to claim 1.

3. A vehicle characterized by comprising the automatic transmission range control system according to claim 2.

Technical Field

The invention relates to the technical field of vehicle control, in particular to a method and a system for controlling gears of an automatic transmission and a vehicle.

Background

The whole vehicle parking is a necessary working condition in the use of the vehicle, the automatic gear type with the electronic gear shifter is provided, and a user can directly click the P gear button to park after braking and parking. Referring to fig. 3, when braking to stop, the tire end remains stationary as it has stopped; because the engine still continues to operate, driving force is output to the transmission system, the whole system is tensioned, and the locomotive can be lifted when the force is large enough. The ratchet 42 is rotated clockwise and tensioned by the driving force of the engine, if the pawl 41 falls down at the moment, then the transmission enters a P gear, the driving force of the engine is disconnected, the ratchet 42 releases the tensioning force counterclockwise due to the loss of the driving force of the engine, and then the ratchet 42 abuts against the pawl 41, so that the parking is successful.

Referring to fig. 4, when the whole vehicle stops, the engine 1 continues to output power to the tire 6 through the clutch 2, the transmission 3 and the drive shaft 5; since the tire 6 is held stationary by the braking force in the brake-stopped state, the clutch 2, the transmission 3, the parking ratchet 4, and the drive shaft 5 of the entire transmission system are tensioned by the driving force of the engine 1 in the direction of the rotation of the engine. In this tensioned state, if the driver requests to engage the gear P at this time, the pawl 41 will be engaged with the ratchet 42 to lock the entire transmission system, so that the transmission system will maintain the tensioned state; however, the clutch 2 is disconnected due to the driver requesting the gear P, at this time, the driving force applied to the transmission system disappears due to the disconnection of the clutch 2, the engine 1 returns to the free state, the transmission 3 and the drive shaft 5 cannot return to the free state because the pawl 41 is clamped into the ratchet 42, the pawl 41 cannot move, and the tension of the transmission 3 and the drive shaft 5 acts on the pawl 41 through the ratchet 42, so that the driving energy of the whole vehicle is applied to the parking pawl mechanism to enable the pawl 41 and the ratchet 42 to enter the clamping state, when the next driving is switched from the gear P to other gears, the driving energy of the last parking is carried on the pawl and the ratchet, so that the gear P is pulled out and clamped, or the gear P is not pulled out, or the problems of high impact and noise during the pulling out of the gear P exist, which are common complaints in the automobile market.

Disclosure of Invention

The invention aims to provide a gear control method of an automatic transmission, which solves the problems of no pulling-out of a P gear due to clamping stagnation, large impact and noise caused by pulling-out of the P gear, ensures the next smooth driving, improves the user experience and reduces the complaints of users.

In order to achieve the above object, the present invention provides a method for controlling a shift position of an automatic transmission, comprising the steps of:

(S1) in response to detecting that the electronic shifter is in the P range position, performing the step (S2);

(S2) the transmission controller judging whether the vehicle speed is 0; if yes, go to execute step (S3); otherwise, the flow is ended;

(S3) the transmission controller judging whether the automatic transmission is in neutral; if yes, go to execute step (S7); otherwise, go to execute step (S4);

(S4) the electronic shifter issuing a neutral request;

(S5) controlling the transmission to execute an in-neutral command;

(S6) the transmission controller judges whether the transmission executes the neutral gear command or not, if so, the execution step is carried out (S7); otherwise, go to execute step (S5);

(S7) the electronic shifter issues a P range request.

The invention also provides an automatic transmission gear control system, which comprises an electronic gear shifter, an automatic transmission and a transmission controller used for controlling the transmission to execute the request of the electronic gear shifter, wherein the electronic gear shifter and the transmission controller are communicated through a CAN bus, and the automatic transmission gear control system CAN execute the steps of the automatic transmission gear control method.

The invention also provides a vehicle comprising the automatic transmission gear control system.

Compared with the prior art, the invention has the following advantages:

according to the automatic transmission gear control method, the automatic transmission is controlled to enter the neutral gear firstly when a driver parks the vehicle, and the driving energy is released by the automatic transmission entering the neutral gear, so that no driving energy exists on a transmission parking mechanism, the next smooth driving is ensured, the problems of no P gear clamping and pulling-out, large P gear pulling-out impact and noise are solved, the user experience is improved, and the user complaints are reduced.

Drawings

FIG. 1 is a flow chart of a method of controlling a gear of an automatic transmission according to the present invention;

FIG. 2 is a schematic structural diagram of the automatic transmission gear control system of the present invention;

FIG. 3 is a schematic view of the operation of the pawl and ratchet;

fig. 4 is a driving relationship diagram between the transmission system and the parking mechanism.

In the figure:

1-an engine; 2-a clutch; 3-a transmission; 4-parking mechanism, 41-pawl, 42-ratchet; 5-a drive shaft; 6-tyre; 7-electronic gear shifter, 8-speed changer and 9-speed changer controller.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

Referring to fig. 1, the embodiment discloses a method for controlling gears of an automatic transmission, comprising the following steps:

(S1) in response to detecting that the electronic shifter is in the P range position, performing the step (S2);

(S2) the transmission controller judging whether the vehicle speed is 0; if yes, go to execute step (S3); otherwise, the flow is ended;

(S3) the transmission controller judging whether the automatic transmission is in neutral; if yes, go to execute step (S7); otherwise, go to execute step (S4);

(S4) the electronic shifter issuing a neutral request;

(S5) controlling the transmission to execute an in-neutral command;

(S6) the transmission controller judges whether the transmission executes the neutral gear command or not, if so, the execution step is carried out (S7); otherwise, go to execute step (S5);

(S7) the electronic shifter issues a P range request.

When a driver stops the vehicle and requests a gear P, the control logic confirms and requests the gearbox to execute neutral gear action, and after the gearbox returns to the neutral gear and releases the driving energy of the engine, the pawl 41 is clamped into the ratchet 42, so that the gear P is smoothly pulled out in the next driving process.

Specifically, when the vehicle is braked and stopped and the driver operates the electronic gear shifter to P, the transmission controller judges whether the current vehicle speed is 0 or not, and when the vehicle speed is not 0, the control logic is directly exited.

When the vehicle is braked and stopped and a driver operates the electronic gear shifter to P, the transmission controller judges whether the current vehicle speed is 0, when the vehicle speed is 0, the transmission controller judges whether the current gear of the automatic transmission is in neutral, if the automatic transmission is in neutral, the electronic gear shifter sends a P gear request to the transmission controller, and the transmission controller controls the automatic transmission to be in P gear.

When the vehicle is braked and stopped and a driver operates the electronic gear shifter to P, the transmission controller judges whether the current vehicle speed is 0, when the vehicle speed is 0, the transmission controller judges whether the current gear of the automatic transmission is in neutral, if the automatic transmission is not in neutral, the electronic gear shifter sends a neutral request to the transmission controller, when the automatic transmission executes a neutral command and feeds back the neutral execution completion condition, and when the feedback does not finish neutral, the electronic gear shifter continues to execute the neutral command; and after the feedback neutral gear is executed, the electronic gear shifter sends a P gear request to the transmission controller, and the transmission controller controls the automatic transmission to be in the P gear.

Referring to fig. 2, the embodiment also discloses an automatic transmission gear control system, which comprises an electronic gear shifter 7, an automatic transmission 8 and a transmission controller 9 for controlling the transmission 8 to execute the request of the electronic gear shifter, wherein the electronic gear shifter 7 and the transmission controller 9 are communicated through a CAN bus, and the automatic transmission gear control system CAN execute the steps of the automatic transmission gear control method.

Specifically, the electronic gear shifter 7 is positioned at a man-machine delivery level and reflects the intention of a driver; and the transmission controller 9 controls the transmission 8 to execute the request of the driver given by the electronic gear shifter 7 after detecting the actual operation condition of the transmission, and the transmission mode is CAN bus transmission. The transmission controller 9 and the transmission 8 are in a controlled object relationship, the transmission controller 9 controls the transmission 8 to execute the request of the electronic gear shifter, and the transmission 8 feeds back the execution condition to the transmission controller 9.

The embodiment also discloses a vehicle which comprises the automatic transmission gear control system.

According to the gear control method of the automatic transmission, the automatic transmission is controlled to enter the neutral gear firstly when a driver parks the vehicle, and the driving energy is released by the automatic transmission entering the neutral gear, so that the transmission parking mechanism has no driving energy, the next smooth driving is ensured, and the problems of no P gear clamping and pulling-out, large P gear pulling-out impact and noise are solved.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.