Automobile motor brake and antilock brake system (ABS) brake coordinate control method

Abstract

The invention discloses an automobile motor brake and antilock brake system (ABS) brake coordinate control method. The method comprises the following steps of: acquiring an automobile wheel speed signal by using a speed sensor; determining the actual road condition through real-time identification by a control system, and setting the hydraulic brake force in an ABS brake system according to a determined adhesion coefficient, wherein residual brake demand is provided by a motor system, and is provided by the ABS system timely when motor brake force is insufficient to guarantee that wheels are not locked during adjustment of the ABS system in the range; monitoring feedback brake capacity of the motor system timely by the control system; determining and adjusting the feedback bake capacity of the motor system to reach a target value; and finally braking by an automobile. The control method is simple; and by the method, the wheel brake pressure adjustment function of the ABS brake system 3 is realized to prevent the wheels from being locked; meanwhile, the brake energy is fed back to the maximum extent, and energy resources are saved.

Description

technical field [0001] The invention relates to a coordinated control method of motor braking and ABS braking, in particular to a coordinated control method of motor braking and ABS braking based on road surfaces with different adhesion coefficients. Background technique [0002] In pure electric vehicles and gasoline-electric hybrid vehicles, in order to improve the energy utilization rate, the motor generates braking force when the vehicle brakes, and the braking energy is recovered to improve the energy utilization rate. Since there are two sets of systems with braking functions, there will be coordination problems between the motor feedback braking and the ABS braking system on the vehicle. If the coordination is not good, the wheels of the vehicle will be locked, resulting in safety problems. [0003] The existing control methods mainly have two problems: [0004] One is for braking safety. In the case of emergency braking of the vehicle, the motor feedback braking is ...

AI Technical Summary

Problems solved by technology

[0004] One is for braking safety. In the case of emergency braking of the vehicle, the motor feedback braking is completely withdrawn, and the braking of the vehicle is completed independently by the ABS system; this method is safe and guaranteed, but without the motor braking feedback, the kinetic energy of the vehicle Almost all of them are converted into heat loss, which is not good for energy saving

In order to improve the energy-saving effect, the motor feedback and the ABS braking system work at the same time during emergency braking. The control method is complicated, and it is easy to cause the wheels to lock easily and cause braking safety problems.

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