A pure electric vehicle torque control method and system

Abstract

The invention relates to a pure electric vehicle torque control method and system, and belongs to the technical field of pure electric vehicles. In the braking process of a vehicle, the current slip rate of the wheels is estimated in real time, whether the current slip rate of the wheels is larger than a slip rate set value or not is judged, if yes, the braking torque of a motor is controlled to be reduced, and the slip rate set value is determined by the slip rate of the wheels when an anti-lock braking system (ABS) works. According to the method, the current slip rate of the wheels is estimated, the braking torque of the motor is controlled to be reduced according to the current slip rate of the wheels, torque control is conducted in advance before the ABS action, the ABS trigger probability during vehicle braking is effectively reduced, and meanwhile the irregularity of the braking process caused by electric braking evacuation can be improved.

Description

Technical field [0001] The invention relates to a torque control method and system for a pure electric vehicle, and belongs to the technical field of a pure electric vehicle. Background technique [0002] The main strategic orientation of the development of the industry, the safety of new energy vehicles has also attracted much attention. In order to better reflect the energy saving and environmental protection advantages of new energy vehicles, new energy vehicles have regenerative braking functions in addition to traditional mechanical braking. ABS is one of the necessary systems for the braking safety of modern cars. This requires coordinated braking control with ABS during the regenerative braking process, which also requires the vehicle to have wheels during the regenerative braking process. Anti-lock braking function. [0003] At present, most of the new energy vehicles adopt the following braking methods: before the empty stroke of the brake pedal opening is all electric b...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a pure electric vehicle torque control method to solve the problem that the brake process is not smooth due to the early intervention of the ABS caused by the electric braking force when the vehicle brakes on a low road surface; Also provided is a pure electric vehicle torque control system

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