A drift stability control method and system for a dual-motor four-wheel drive vehicle

By introducing dual-parameter feedback of yaw rate and center of gravity sideslip angle into a dual-motor four-wheel drive electric vehicle, and combining it with the front axle torque compensation MAP, the problem of being unable to distinguish the runaway trend in the existing technology is solved, and precise and stable control of the vehicle's drift attitude and safety are achieved.

CN122126100APending Publication Date: 2026-06-02CHERY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHERY AUTOMOBILE CO LTD
Filing Date
2026-03-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In the existing technology, the drift mode of dual-motor four-wheel drive electric vehicles cannot achieve precise and stable control. Traditional ESP systems cannot distinguish between the loss of control trend of excessive or insufficient rotation of the vehicle, resulting in the inability to provide targeted torque compensation. Furthermore, existing drift assist systems rely on a single yaw rate control, which cannot fully perceive the vehicle's rotation state and sideslip attitude.

Method used

By introducing yaw rate and center of gravity sideslip angle as state feedback parameters, and combining them with a preset front axle torque compensation MAP, compensation torques in opposite directions are applied to over-rotation and under-rotation loss-of-control trends, respectively, to achieve comprehensive perception and precise control of the vehicle's rotation state and sideslip attitude.

Benefits of technology

It achieves closed-loop stable control of vehicle drift posture, improving the controllability and fun of the drift experience, while ensuring driving safety. It can accurately intervene in different loss of control trends and keep the vehicle within the preset stable drift target range.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a drift stabilization control method and system for dual-motor four-wheel drive vehicles, belonging to the field of vehicle dynamics control technology. The method includes: detecting when the vehicle enters drift mode and acquiring the actual yaw rate and actual sideslip angle in real time; querying a preset front axle torque compensation MAP based on these two parameters to obtain the target front axle compensation torque; synthesizing the target front axle compensation torque with the base front axle torque based on the driver's throttle input to obtain the final target front axle torque; and controlling the front axle motor to output this torque to maintain the vehicle's state within the stable drift target range. This invention achieves precise and natural drift assistance through dual-parameter sensing and zoned control, improving stability and safety during drifting.
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