Vehicle braking method, controller and vehicle

By acquiring the actual and standard torque of the motor, determining the attenuation amount and indicated value, and controlling the friction braking system to generate the target braking torque, the problems of braking feel and safety caused by motor or battery failures are solved, and a stable braking effect is achieved.

CN122186149APending Publication Date: 2026-06-12SAIC MOTOR
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SAIC MOTOR
Filing Date
2024-12-12
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

When a vehicle's motor or battery malfunctions, the motor's energy recovery process is limited, preventing the driver from achieving the intended braking purpose and affecting braking feel and safety.

⚗Method used

By acquiring the actual torque and standard torque of the motor, determining the attenuation amount and the first indicated value, the friction braking system is controlled to generate the target braking torque to compensate for the attenuation of deceleration caused by motor or battery failure, ensuring that the driver's braking purpose is achieved when the brake pedal reaches the expected position.

🎯Benefits of technology

It improves the driver's braking feel and effectively ensures vehicle safety during driving, ensuring that braking performance is not affected by motor or battery failure.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application discloses a vehicle braking method, controller, and vehicle, comprising: acquiring the actual torque and standard torque of the vehicle's motor during energy recovery; determining a decay amount based on the actual torque and standard torque, the decay amount indicating the degree of decrease in the efficiency of energy recovery by the motor during energy recovery; determining a first indication value indicating the current position of the vehicle's brake pedal; determining a target braking torque based on the decay amount and the first indication value; and controlling the braking torque generated by the vehicle's friction braking system to be the target braking torque. Thus, when the vehicle's motor or battery malfunctions, the braking effect will not be weakened when the brake pedal reaches its current position due to the malfunction. Therefore, the driver can achieve the desired braking purpose after pressing the brake pedal to the expected position, improving the driver's braking feel, and the vehicle's braking effect is not affected by the malfunction, effectively ensuring vehicle safety.
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