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Gear shifting control method and device

A control method and control device technology, applied in the field of vehicles, can solve the problems of long shift time, poor accuracy, and extensive control, and achieve the effects of reducing synchronization time, improving accuracy, and shortening the power interruption time

Active Publication Date: 2020-12-01
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a shift control method and device to solve the problems of rough control, long shift time and poor accuracy of existing shift control methods

Method used

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  • Gear shifting control method and device
  • Gear shifting control method and device
  • Gear shifting control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] refer to figure 1 , the present invention provides a shift control method, the method comprising:

[0061] Step S101, acquiring a target gear, which is the next gear to be switched by the user.

[0062]Specifically, the gear shift control method provided by the present invention can be applied to new energy electric vehicles, and the gear shift of the electric vehicle can rely on the gear shift control system of the car, and the gear shift control system can include ACU (Actuation Control Unit, speed reducer control unit), HCU (Hybrid Control Unit, hybrid control unit), MCU (MotorControl Unit, motor control unit), two-speed reducer (including shift motor, shift fork, synchronizer, etc.). HCU is the whole vehicle controller, which decides when to shift gears. ACU can drive gear shift actuators (such as gear shift motors, shift forks, and synchronizers) to complete the gear shift process of the reducer. The MCU can control the drive motor to provide torque or speed to ...

Embodiment 2

[0077] refer to figure 2 , the present invention provides yet another shift control method, the method comprising:

[0078] Step S201, if the initial gear is the working gear, control the working gear to switch to neutral gear.

[0079] Specifically, similar to the shifting process of traditional fuel vehicles, each shifting process requires the gear lever to be shifted from the neutral position. If the initial gear is not in the neutral position at the beginning of the shift, such as in forward gear, reverse gear, etc., At this time, the gear shift motor can be used to automatically adjust or give the user a prompt to switch the initial working gear to the neutral position, so as to avoid damage to the gear shifting mechanical components.

[0080] Step S202, acquiring a target gear, and the target gear is the next gear to be switched by the user.

[0081] Specifically, the gear shift control method provided by the present invention can be applied to new energy electric veh...

Embodiment 3

[0105] refer to image 3 , the present invention provides a shift control device, said device comprising:

[0106] The target gear obtaining module 301 is used to obtain the target gear, and the target gear is the next gear to be switched by the user;

[0107] A mode switching module 302, configured to control the MCU to switch to the speed control mode according to the target gear;

[0108] A time determination module 303, configured to determine the speed regulation time of the drive motor in the speed control mode;

[0109] A moving speed determination module 304, configured to determine the shifting moving speed of the synchronizer based on the speed regulation time and the preset shifting distance;

[0110] A trigger module 305, configured to trigger the synchronizer to move to a target synchronization point within the speed regulation time according to the shifting speed, wherein the target synchronization point is the meshing position corresponding to the target gear;...

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Abstract

The invention provides a gear shifting control method and device. The method comprises the steps: obtaining a target gear which is the next gear to be switched by a user; controlling an MCU to switchto a speed control mode according to the target gear; in the speed control mode, determining the speed regulation time of a driving motor; based on the speed regulation time and a preset gear shiftingdistance, determining the gear shifting moving speed of a synchronizer; according to the gear shifting moving speed, triggering the synchronizer to move to a target synchronization point within the speed adjusting time, wherein the target synchronization point is the meshing position corresponding to the target gear; and when the synchronizer reaches the target synchronization point and the speedregulation of the driving motor is completed, driving the synchronizer to execute a gear advancing action so as to be switched to the target gear. According to the gear shifting control method, the speed regulating time for regulating the speed of the driving motor to the target rotating speed can be calculated, and then the movement speed of the synchronizer is calculated according to the time,so that the speed regulation and the movement of the synchronizer are completed at the same time, and the gear shifting accuracy and stability can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a shift control method and device. Background technique [0002] At present, with the development and progress of new energy technology, new energy electric vehicles are increasingly valued by various manufacturers. In order to improve the working efficiency of the motor and improve the power and fuel economy of the vehicle, some powertrains use a two-speed reducer, and the selection of different gears can ensure that the motor works in the high-efficiency range. [0003] The existing two-speed reducer generally drives the synchronizer to shift gears by the shift motor. During the shift process, the drive motor accelerates or decelerates to the target speed according to the target speed signal. When the drive motor reaches the target speed, the shift motor is controlled. Drive the engaging sleeve of the synchronizer to move to the direction of the target gear, and complete the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H61/04
CPCF16H61/0213F16H61/04F16H2061/0422
Inventor 章宏文李建辉王昫布涛涛刘强曹兴顺刘新强
Owner GREAT WALL MOTOR CO LTD
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