阅读说明：本技术 变速控制系统 (Speed change control system ) 是由 陈益新 于 2018-09-26 设计创作，主要内容包括：一种变速控制系统,适于搭载于一双轮机动车的一车体。变速控制系统包含一变速器组件、一移动装置以及一变速控制器。变速器组件用以设置于车体以及执行一换档程序。移动装置用以可分离地设置于车体。移动装置包含一姿态感测器,且姿态感测器用以检测车体的一当前重心位置信息。变速控制器用以设置于车体,且变速控制器用以接收姿态感测器所检测的当前重心位置信息。变速控制器用以根据当前重心位置信息换算出一侧倾角变化量并依据侧倾角变化量输出一档位控制指令。其中,变速控制器根据档位控制指令以控制变速器组件是否执行换档程序。(A shift control system is adapted to be mounted on a vehicle body of a two-wheeled motor vehicle. The speed change control system comprises a speed changer assembly, a moving device and a speed change controller. The transmission assembly is arranged on the vehicle body and used for executing a gear shifting program. The moving device is detachably arranged on the vehicle body. The mobile device comprises an attitude sensor, and the attitude sensor is used for detecting current gravity center position information of the vehicle body. The speed change controller is arranged on the vehicle body and used for receiving the current gravity center position information detected by the attitude sensor. The speed change controller is used for converting a side inclination angle variation according to the current gravity center position information and outputting a gear control instruction according to the side inclination angle variation. Wherein, the speed change controller controls whether the transmission assembly executes a gear shifting program according to the gear control instruction.)

1. A shift control system adapted to be mounted on a vehicle body of a two-wheeled motor vehicle, comprising:

a transmission assembly for being mounted to the vehicle body and executing a gear shifting process;

the mobile device is used for being detachably arranged on the vehicle body and comprises an attitude sensor used for detecting current gravity center position information of the vehicle body; and

a speed change controller, configured to be disposed on the vehicle body, the speed change controller being configured to receive the current center-of-gravity position information detected by the attitude sensor, and the speed change controller being configured to calculate a side tilt angle variation according to the current center-of-gravity position information and output a shift control command according to the side tilt angle variation;

and the transmission controller controls whether the transmission component executes the gear shifting program according to the gear control command.

2. The shift control system according to claim 1, wherein the shift controller comprises an information acquisition module, an information transmission module, a shift determination module, and a shift execution module, the information acquisition module is used for detecting a plurality of hardware information of the two-wheeled motor vehicle and the transmission component, the information transmission module is used for receiving the current gravity center position information and the hardware information and transmitting the current gravity center position information and the hardware information to the speed change judgment module, the speed change judging module is used for judging whether to execute a gear shifting judging program according to the hardware information, the gear shifting judging program comprises a step of converting the roll angle variation according to the current gravity center position information and outputting the gear control instruction according to the roll angle variation, the gear shifting execution module controls whether the transmission component executes the gear shifting program according to the gear control command.

3. The transmission control system of claim 2, wherein the information collecting module comprises a rear wheel speed sensor for detecting a vehicle speed information of the two-wheeled vehicle, a throttle position sensor for detecting a throttle opening information of an engine of the two-wheeled vehicle, and a shift motor angle sensor for detecting a current gear information of the transmission assembly; when the speed change judging module judges that the vehicle speed information and the throttle opening information respectively reach a gear shift critical value according to the current gear information, the speed change judging module executes the gear shift judging program.

4. The shift control system according to claim 2, wherein the shift position control command includes a shift prohibition signal, a current-maintained shift position signal, and a direct shift signal; when the gear-shifting judgment program outputs the gear-shifting prohibition signal, the gear-shifting execution module controls the transmission component not to execute the gear-shifting program and enables the current gear of the two-wheeled motor vehicle to be switched to the neutral gear; when the gear shifting judgment program outputs the current gear maintaining signal, the gear shifting execution module controls the transmission component not to execute the gear shifting program; when the gear shifting judging program outputs the direct gear shifting signal, the gear shifting execution module controls the transmission assembly to execute the gear shifting program.

5. The shift control system according to claim 4, wherein the shift determination routine includes:

sending a speed change control request;

reading the current gravity center position information;

converting the roll angle variation according to the current gravity center position information; and

judging whether the roll angle variation is larger than or equal to a roll angle upper limit value,

if yes, outputting the gear change prohibiting signal; and

if not, judging whether the roll angle variation is larger than or equal to a lower limit value of a roll angle,

if yes, outputting the current gear maintaining signal; and

if not, the direct speed change signal is output.

6. The shift control system according to claim 5, wherein the information collecting module comprises a rear wheel speed sensor for detecting a vehicle speed information of the two-wheeled vehicle, a tire pressure sensor for detecting a tire pressure information of the two-wheeled vehicle, and an oil pressure sensor for detecting a hydraulic information of an anti-lock brake system of the two-wheeled vehicle, and the shift controller adjusts the upper and lower values of the roll angle according to the vehicle speed information, the tire pressure information, and the hydraulic information.

7. The shift control system of claim 1, wherein the transmission assembly includes a clutch, a shift drum, a clutch actuator for controlling the clutch, and a shift control motor for controlling the shift drum, the shift routine including driving the clutch actuator to control the clutch and driving the shift control motor to control the shift drum.

8. The system of claim 1, wherein the mobile device further comprises a first wireless transmission module, the variable speed controller comprises a second wireless transmission module, and the first wireless transmission module wirelessly transmits the current center of gravity position information to the second wireless transmission module.

9. The system of claim 8, wherein the first wireless transmission module and the second wireless transmission module are bluetooth communication modules.

10. The system of claim 1, further comprising a transmission line, wherein the transmission line connects the mobile device and the shift controller, and the shift controller receives the current center of gravity position information detected by the attitude sensor through the transmission line.

11. The shift control system according to claim 1, wherein the mobile device is a smart phone.

12. The shift control system according to claim 1, wherein the moving device is detachably disposed at a center of gravity of the vehicle body at a junction of a fuel tank and a seat cushion of the vehicle body.

13. The shift control system according to claim 1, wherein the moving means is adapted to be detachably disposed in an extending direction of an axis passing through a center of gravity position of the vehicle body and perpendicular to the ground.

14. The shift control system according to claim 13, wherein the moving device is detachably disposed above a fuel tank of the vehicle body or in a storage box of the vehicle body.

Technical Field

The invention relates to a speed change control system, in particular to a speed change control system applied to a two-wheeled motor vehicle.

Background

The vehicle transmission system has a function of transmitting power, and the main purpose is to adjust the relationship between the engine speed and the vehicle speed according to the road condition and the driving requirement, so as to efficiently use the power source. Generally, a locomotive can be broadly classified into a geared locomotive that is shifted by a manual transmission and a scooter locomotive that is shifted by an automatic transmission. In the automatic transmission, the engagement of the transmission gears is changed by a clutch actuator, so that the speed can be automatically or semi-automatically changed, and the automatic gear shifting effect is achieved. The actuator changes the speed according to information such as the current vehicle speed, gear position, and accelerator opening of the vehicle.

Because the automatic transmission automatically shifts gears when detecting that the accelerator opening and the vehicle speed reach the gear shifting threshold value, the dynamic behavior of the vehicle during running is not considered, so that the vehicle can sideslip due to sudden gear shifting when the vehicle runs on a curve and the vehicle body inclines to a greater degree.

Disclosure of Invention

The invention aims to provide a speed change control system, which solves the problem that in the prior art, when a vehicle runs on a curve and the inclination degree of a vehicle body is large, the vehicle is likely to sideslip due to sudden gear shifting.

The invention discloses a gear shift control system which is suitable for being mounted on a vehicle body of a two-wheeled motor vehicle. The speed change control system comprises a speed changer assembly, a moving device and a speed change controller. The transmission assembly is arranged on the vehicle body and used for executing a gear shifting program. The moving device is detachably arranged on the vehicle body. The mobile device comprises an attitude sensor, and the attitude sensor is used for detecting current gravity center position information of the vehicle body. The speed change controller is arranged on the vehicle body and used for receiving the current gravity center position information detected by the attitude sensor. The speed change controller is used for converting a side inclination angle variation according to the current gravity center position information and outputting a gear control instruction according to the side inclination angle variation. Wherein, the speed change controller controls whether the transmission assembly executes a gear shifting program according to the gear control instruction.

According to the shift control system disclosed in the above embodiments, the posture sensor provided in the mobile device itself detects the current gravity center position information of the vehicle body when the two-wheeled vehicle is running, and the shift controller converts the change amount of the roll angle according to the current gravity center position information and controls whether the transmission component executes the shift process according to the change amount of the roll angle. This prevents the two-wheeled motor vehicle from shifting unexpectedly when, for example, the two-wheeled motor vehicle is in a sharp curve and has a large amount of change in roll angle, and thus prevents the two-wheeled motor vehicle from slipping sideways in a curve.

In addition, the current gravity center position information of the vehicle body is detected by utilizing the attitude sensor equipped in the mobile device, and the additional built-in attitude sensor on the vehicle body is not needed, so that the cost of the built-in attitude sensor on the vehicle body can be saved.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a schematic side view of a vehicle body in which a shifting device of a shift control system according to an embodiment of the present invention is mounted on a two-wheeled motor vehicle.

FIG. 2 is a block schematic diagram of the shift control system of FIG. 1.

FIG. 3 is a schematic flow chart illustrating the mobile device of FIG. 1 being mounted on a vehicle body and being in communication with a two-wheeled vehicle.

FIG. 4 is a flowchart illustrating a shift determination routine of the shift determination module of FIG. 3.

Fig. 5 is a schematic front view of the motorcycle of fig. 1 as it rides on a curve.

Fig. 6 is a schematic side view of a vehicle body in which a shifting device of a shift control system according to another embodiment of the present invention is mounted on a two-wheeled motor vehicle.

Wherein the reference numerals

1 Shift control System

M-speed changer assembly

M1 clutch

M2 variable speed drum

M3 clutch actuator

M4 shift control motor

P, Pb moving device

P1 attitude sensor

P2 information transfer module

P3 first wireless transmission module

C speed change controller

C1 second wireless transmission module

C2 information acquisition module

C21 rear wheel speed sensor

C22 throttle position sensor

C23 shift motor angle sensor

C3 information transmission module

C4 speed change judgment module

S2 shift determination routine

C5 shift execution module

9. 9b two-wheel motor vehicle

90. 90b vehicle body

L, Lb center of gravity position

Axis of AL

91 oil tank

93 chair cushion

95b storage box

S101-S108 process for communication connection between mobile device and two-wheeled motor vehicle and positioning initial gravity center position of mobile device

Process of the shift determination routine from S201 to S208

Variation of R roll angle

Upper limit of R1 roll angle

Lower limit of R2 roll angle

Detailed Description

The detailed features and advantages of the embodiments of the present invention are described in detail below, which is sufficient for anyone skilled in the art to understand the technical contents of the embodiments of the present invention and to implement the embodiments, and the related objects and advantages of the present invention can be easily understood by anyone skilled in the art according to the disclosure of the present specification, the scope of the claims and the accompanying drawings. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.

In the drawings, the size, proportion, angle and the like of the drawings are exaggerated for illustrative purposes, but the invention is not limited thereto. Various modifications can be made without departing from the spirit of the invention. The term "over" as used in the description may mean "suspended over" or "touching the upper surface". In addition, the terms "upper side", "lower side", "above" and "below" described in the specification are for convenience of description and are not intended to limit the present invention. The term "substantially" as used herein may refer to deviations caused by tolerances that allow for manufacturing.

Referring to fig. 1 to 3, fig. 1 is a schematic side view of a mobile device of a gear shift control system mounted on a vehicle body of a two-wheeled vehicle according to an embodiment of the present invention, fig. 2 is a schematic block diagram of the gear shift control system of fig. 1, and fig. 3 is a schematic flow chart of the mobile device of fig. 1 disposed on the vehicle body and in communication connection with the two-wheeled vehicle.

The present embodiment provides a gear shift control system 1 suitable for a vehicle body 90 mounted on a two-wheeled vehicle 9. The gear shift control system 1 includes a transmission assembly M, a moving device P and a gear shift controller C.

The transmission module M is configured to be installed on the vehicle body 90 and perform a gear shifting procedure. The transmission module M includes a clutch M1, a shift drum M2, a clutch actuator M3, and a shift control motor M4. The clutch actuator M3 is used to control the clutch M1, and the shift control motor M4 is used to control the shift drum M2. When the transmission assembly M performs a gear shift process, the clutch actuator M3 is driven to control the clutch M1 to disengage or engage a power source (not shown) and a transmission system (not shown) of the two-wheeled motor vehicle 9, and the gear shift control motor M4 is driven to control the shift drum M2 to change gears.

The mobile device P is, for example, a smart phone, and is detachably disposed at a center of gravity L of the vehicle body 90. The mobile device P includes an attitude sensor (attitude sensor) P1, a message transmission module P2, and a first wireless transmission module P3.

The attitude sensor P1 is used for detecting a current barycentric location information of the vehicle body 90. In particular, since the weight of the rider changes the center of gravity of the entire motorcycle 9 when the rider rides the motorcycle 9, the current center-of-gravity position information is information regarding the current center-of-gravity position of the rider and the entire motorcycle 9.

In the embodiment, the moving device P is detachably disposed at the center of gravity L of the vehicle body 90, thereby facilitating the attitude sensor P1 to detect the current center of gravity information of the vehicle body 90 more accurately. In addition, in consideration of convenience when the mobile device P is mounted on the vehicle body 90 and when the mobile device P is removed from the vehicle body 90, the mobile device P may be detachably disposed near the center of gravity L of the vehicle body 90, for example, and the mobile device P may be disposed in an extending direction of an axis AL of the vehicle body 90 passing through the center of gravity L and perpendicular to the ground, for example. For example, the motorcycle 9 of the present embodiment is a straddle type motorcycle, and the center of gravity of the vehicle body 90 plus the entire rider is located at approximately the intersection between the oil tank 91 and the seat cushion 93 of the motorcycle 9, so in the present embodiment, the moving device P is disposed above the oil tank 91 of the vehicle body 90 and in the extending direction of the axis AL. Therefore, the accuracy of the attitude sensor P1 for detecting the current gravity center position information and the convenience of the rider for taking and placing the mobile device P can be considered.

The information transmitting module P2 is used for receiving and transmitting the current barycentric location information from the attitude sensor P1 to the first wireless transmitting module P3. Generally, a current smart phone is equipped with an attitude sensor, which senses the magnitude of an inertial force in a specific direction of the smart phone to measure the acceleration and gravity in the direction, so as to sense the change of the orientation of the smart phone and return three axial tilt angles to match various applications of the smart phone. The three axial inclination angles are respectively a Pitch angle (Pitch angle) of an X axis, a Roll angle (Roll angle) of a Y axis and a rotation angle (Yaw angle) of a Z axis. In the embodiment, the attitude sensor carried by a general smart phone is used for detecting the current gravity center position information of the two-wheeled motor vehicle 9 during running, and an additional attitude sensor is not required to be built in the vehicle body, so that the cost of building the attitude sensor in the vehicle body can be saved.

In the present embodiment, the mobile device P and the two-wheeled motor vehicle 9 can be connected to each other by communication through the respective applications, and the detailed steps of positioning the mobile device P at an initial barycentric position of the vehicle body 90 after the communication connection are shown in fig. 3. First, an application program of the mobile device P is started (step S101), and the mobile device P is fixed to the center of gravity position of the vehicle body 90 (step S102). Next, the ignition switch of the two-wheeled motor vehicle 9 is turned on (step S103), and the application of the two-wheeled motor vehicle 9 is started (step S104). After the respective applications of the mobile device P and the two-wheeled motor vehicle 9 are started, the application of the mobile device P and the application of the two-wheeled motor vehicle 9 are connected (step S105). When it is judged that the connection of the application program of the mobile device P with the application program of the two-wheeled motor vehicle 9 is successful (step S106), the mobile device P is positioned at the initial barycentric position of the vehicle body 90 (step S107). Finally, the engine of the two-wheeled motor vehicle 9 is started (step S108). Thereby, the communication connection of the mobile device P and the two-wheeled motor vehicle 9 is completed, and the positioning of the mobile device P at the initial barycentric position of the vehicle body 90 is completed, thereby completing the preparation before the two-wheeled motor vehicle 9 travels.

In step S107 (i.e., when positioning the mobile device P at the initial barycentric position of the vehicle body 90), the mobile device P is placed at the initial barycentric position and the coordinate system setting of the attitude sensor P1 is zeroed while the motorcycle 9 is stationary, thereby completing the positioning.

The sequence of the steps S101 to S103 is only an example, and is not intended to limit the present invention. In other embodiments, the sequence of steps S101 to S103 may be changed according to actual operation requirements.

The transmission controller C is disposed on the vehicle body 90, and includes a second wireless transmission module C1, an information acquisition module C2, an information transmission module C3, a transmission determination module C4, and a shift execution module C5.

In the present embodiment, the second wireless transmission module C1 of the gearshift controller C and the first wireless transmission module P3 of the mobile device P are bluetooth communication modules, and the gearshift controller C receives the current gravity center position information transmitted by the first wireless transmission module P3 through the second wireless transmission module C1. Therefore, the current gravity center position information is transmitted in a wireless mode, the trouble that the system needs to additionally pull a wire can be avoided, and the mobile device can be conveniently fixed or taken down by a rider.

The information collecting module C2 includes a rear wheel speed sensor C21, a throttle position sensor C22 and a shift motor angle sensor C23. The rear wheel speed sensor C21 is used to detect a vehicle speed information of the two-wheel vehicle 9 during driving, the throttle position sensor C22 is used to detect a throttle opening information of the engine of the two-wheel vehicle 9, and the shift motor angle sensor C23 is used to detect a current gear information of the transmission module M.

The information transmission module C3 is used for receiving and transmitting the current barycentric location information from the second wireless transmission module C1 and the vehicle speed information, the throttle opening information and the current gear information of the information acquisition module C2 to the gear change judgment module C4.

The gear-shifting determination module C4 is used for determining whether the vehicle speed information and the throttle opening information respectively reach a gear-shifting threshold according to the current gear information to determine whether to execute a gear-shifting determination process S2. For example, when the gear shift determination module C4 determines that the vehicle speed of the two-wheeled vehicle 9 reaches a threshold speed value and the throttle opening of the engine of the two-wheeled vehicle 9 reaches a threshold opening value according to the current gear information of the transmission module M, the gear shift determination module C4 executes the gear shift determination process S2.

Finally, the shift execution module C5 executes a shift control command to control whether the transmission module M executes the shift sequence based on the shift determination module C4 outputting the shift determination sequence S2. In the present embodiment, the shift routine does not include shifting the current gear to neutral.

The gear control command includes a shift inhibit signal, a hold current gear signal, and a direct shift signal. The various signals of the above-described shift position control command and the control of the transmission module M are described below together with the flow of the shift determination routine S2.

Referring to fig. 4 and 5, fig. 4 is a flowchart illustrating a shift determination procedure of the shift determination module of fig. 3, and fig. 5 is a front view illustrating a rider riding the motorcycle of fig. 1 while driving a curve.

The shift determination process S2 sequentially includes issuing a shift control request (step S201), reading the current barycentric position information (step S202), calculating a roll angle variation R based on the current barycentric position information (step S203), and determining whether the roll angle variation R is greater than or equal to a roll angle upper limit value R1 (step S204).

If the roll angle variation R is greater than or equal to the roll angle upper limit value R1, a shift prohibition signal is output (step S205), and the shift execution module C5 controls the transmission module M4 to not execute the shift process and to shift the current gear of the motorcycle 9 to the neutral gear. Since the two-wheeled motor vehicle 9 may have been inadvertently tilted on the road when the roll angle variation R is greater than or equal to the roll angle upper limit value R1, the shift execution module C5 controls the current gear of the two-wheeled motor vehicle 9 to be shifted to neutral, thereby avoiding a sudden jerk condition when the two-wheeled motor vehicle 9 is in a tilted state or pulled.

On the other hand, if the roll angle variation R is smaller than the roll angle upper limit R1, it is determined whether the roll angle variation R is greater than or equal to the roll angle lower limit R2 (step S206).

If the roll angle variation R is greater than or equal to the roll angle lower limit R2, a signal to maintain the current gear is output (step S207), at which time the shift execution module C5 controls the transmission module M4 to not execute the shift process and maintain the current gear. For example, when the two-wheeled motor vehicle 9 is traveling in a sharp curve with a small radius of curvature at a fast speed, the roll angle variation R is relatively large, and the two-wheeled motor vehicle 9 is likely to slip due to unexpected gear shifting, so that when the roll angle variation R is between the upper roll angle limit R1 and the lower roll angle limit R2, the gear shifting execution module C5 controls the transmission module M4 to not execute the gear shifting procedure and maintain the current gear position, thereby preventing the two-wheeled motor vehicle 9 from unexpected gear shifting when the roll angle variation R is large, and further preventing the two-wheeled motor vehicle 9 from slipping in the curve.

On the other hand, if the roll angle variation R is smaller than the roll angle lower limit value R2, a direct shift signal is outputted (step S208), and the shift execution module C5 controls the transmission module M to execute a shift process. Generally, when the motorcycle 9 is running in a gentle curve with a large radius of curvature, or the motorcycle 9 is cornering excessively at a slow vehicle speed, the roll angle variation R is relatively small, and the motorcycle 9 is less likely to slip, so that the transmission module M can directly perform the shift process when the condition that the roll angle variation R is smaller than the roll angle lower limit value R2 is reached.

In the present embodiment, the angular magnitudes of the upper limit value R1 and the lower limit value R2 of the roll angle are not particularly limited, and the upper limit value R1 and the lower limit value R2 of the roll angle can be adjusted according to the actual use requirements of the two-wheeled motor vehicle 9. For example, the transmission controller C may adjust the roll angle upper limit value R1 and the roll angle lower limit value R2 depending on the vehicle speed when the two-wheeled motor vehicle 9 is running, for example, when the vehicle speed reaches 100kph, the roll angle upper limit value R1 may be set to 60 degrees, and the roll angle lower limit value R2 may be set to 10 degrees; when the vehicle speed reaches 200kph, the roll angle upper limit value R1 may be set to 30 degrees, and the roll angle lower limit value R2 may be set to 5 degrees. Besides the vehicle speed as the basis for setting the upper limit value R1 and the lower limit value R2, the shift controller C may also adjust the upper limit value R1 and the lower limit value R2 in accordance with the magnitude of the friction between the tires and the ground when the motorcycle 9 is running on the road. In detail, the information collecting module C2 may further include a tire pressure sensor (not shown) for detecting a tire pressure information of the two-wheeled motor vehicle 9 and an oil pressure sensor (not shown) for detecting a hydraulic pressure information of an anti-lock brake system (ABS) of the two-wheeled motor vehicle 9. The variable speed controller C converts the magnitude of the positive force applied to the ground by the tire according to the tire pressure information, estimates the braking force according to the hydraulic information, and calculates the magnitude of the friction force between the tire and the ground by combining the data of the positive force and the braking force, so as to be used as a basis for adjusting the upper limit value R1 and the lower limit value R2 of the roll angle.

In the present embodiment, the gear shift determination module C4 determines whether to execute the gear shift determination procedure S2 according to the vehicle speed information, the throttle opening information and the current gear information, but the invention is not limited thereto. In other embodiments, the information collecting module C2 may further detect other hardware information of the two-wheeled vehicle 9 and the transmission module M, such as the shift fork angle, the main oil pressure, and the clutch pressure, according to the actual requirement, and the gear shift determining module C4 may include the hardware information and determine whether to execute the gear shift determining process S2.

In the present embodiment, the mobile device P and the shift controller C wirelessly transmit and receive the current center of gravity position information through the first wireless transmission module P3 and the second wireless transmission module C1, but the invention is not limited thereto. In other embodiments, the transmission line may be further included to connect the moving device and the speed change controller, so that the speed change controller receives the current gravity center position information detected by the attitude sensor through the transmission line, thereby reducing interference to the signal transmission and achieving better signal transmission quality.

In the embodiment, the mobile device P is a smart phone, but the invention is not limited thereto. In other embodiments, the mobile device may be a gesture sensor equipped mobile device, such as a tablet computer or a smart watch.

In the present embodiment, the motorcycle 9 is a straddle type motorcycle, and the center of gravity of the vehicle body 90 plus the entire rider is located at approximately the intersection between the oil tank 91 and the seat cushion 93 of the motorcycle 9, so the moving device P of the present embodiment is disposed above the oil tank 91. However, the shift control system 1 according to the present invention is not limited to being mounted on a straddle type motorcycle.

For example, please refer to fig. 6, which is a schematic side view of a vehicle body of a two-wheeled vehicle mounted with a mobile device of a gear shift control system according to another embodiment of the present invention.

In the present embodiment, the motorcycle 9b is exemplified by a scooter type motorcycle, and the center of gravity position Lb of the vehicle body 90b plus the whole rider is lower than the center of gravity position Lb of the straddle type motorcycle, so in the present embodiment, the moving device Pb is preferably disposed in a storage box 95b of the vehicle body 90b adjacent to the center of gravity position Lb.

According to the shift control system of the above embodiment, the current barycentric position information of the vehicle body when the two-wheeled motor vehicle is running is detected by the attitude sensor equipped to the moving device itself, and the amount of change in the roll angle is converted by the shift controller based on the current barycentric position information, and whether the transmission assembly executes the shift process and whether the current gear of the two-wheeled motor vehicle is switched to the neutral position are controlled based on the amount of change in the roll angle. Therefore, on one hand, unexpected speed change of the two-wheeled motor vehicle can be avoided when the two-wheeled motor vehicle has large roll angle change amount due to sharp bend, and further the two-wheeled motor vehicle can be prevented from sideslipping in the bend, on the other hand, when the two-wheeled motor vehicle carelessly falls down on the road surface, the current gear of the two-wheeled motor vehicle can be switched to the neutral position through the control of the speed change controller, and therefore the situation that the two-wheeled motor vehicle suddenly rushes in the falling state or in the pulled and supported state can be avoided.

In addition, the current gravity center position information of the vehicle body is detected by utilizing the attitude sensor equipped in the mobile device, and the additional built-in attitude sensor on the vehicle body is not needed, so that the cost of the built-in attitude sensor on the vehicle body can be saved.

In addition, in some embodiments, the current gravity center position information measured by the attitude sensor of the mobile device is transmitted to the speed change controller by using the bluetooth communication module. Therefore, the current gravity center position information is transmitted in a wireless mode, the trouble that the system needs to additionally pull a wire can be avoided, and the mobile device can be conveniently fixed or taken down by a rider.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.