Torque control method and device, vehicle and readable storage medium

By determining the slip rate in the vehicle and adjusting the output torque of the drive motor, the jitter and abnormal noise problems of the vehicle when accelerating or decelerating through the speed bump are solved, and a more stable driving experience is achieved.

CN119682555AActive Publication Date: 2025-03-25GREAT WALL MOTOR CO LTD
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Patent Information

Application Number
CN202411857292.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-03-25
Estimated Expiration
2044-12-17

AI Technical Summary

Technical Problem

When the vehicle is driven by a pure motor, especially when the acceleration or deceleration passes through the speed bump, there will be problems of jitter and abnormal noise. This is mainly due to the sharp changes in the motor speed, the gear meshing is uneven, causing impact and friction.

Method used

By determining the slip rate of the vehicle, when it is greater than the slip rate threshold, in response to the vehicle being in a variable speed driving state, the speed limit, the current speed and output torque of the drive motor are obtained, and the target output torque is determined based on these parameters. When the vehicle accelerates, the target output torque is less than the current output torque, reducing the speed of the drive motor; when the vehicle decelerates, the target output torque is greater than the current output torque, increasing the speed of the drive motor to adjust the speed of the drive motor and avoid jitter and abnormal noise.

Benefits of technology

It effectively avoids jitter and abnormal noise caused by the sharp change in the speed of the driving motor when the vehicle is accelerating or decelerating through the speed bump, and improves the user's driving experience.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a torque control method and device, a vehicle and a readable storage medium, the method is applied to the technical field of vehicles, and the method comprises the steps that the slip rate of the vehicle is determined; under the condition that the slip rate of the vehicle is larger than the slip rate threshold value, responding to the situation that the vehicle is in the variable-speed driving state, and obtaining the rotating speed limit value of a driving motor of the vehicle, the current rotating speed of the driving motor and the current output torque of the driving motor; according to the slip rate, the rotating speed limit value and the current rotating speed of the vehicle and the current output torque of the driving motor, the target output torque of the driving motor is determined, and when the vehicle is in the accelerated driving state, the determined target output torque is smaller than the current output torque; when the vehicle is in the deceleration driving state, the determined target output torque is larger than the current output torque; and adjusting the current output torque of the driving motor to the target output torque so as to adjust the rotating speed of the driving motor. The method can prevent the vehicle from shaking and abnormal sound when the vehicle passes through the deceleration strip during acceleration / deceleration.
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