Control device and control method for vehicle compound braking system

Abstract

The invention relates to a control device for a vehicle compound braking system. The control device comprises an electronic control unit, a resistance regulator and a motor controller, wherein the electronic control unit is used for controlling a pressure braking subsystem and a motor regenerative braking subsystem of the compound braking system; the resistance regulator is connected with a wheel hub motor loop of the motor regenerative braking subsystem; the motor controller is used for carrying out real-time control on a wheel hub motor and the resistance regulator; the electronic control unit is used for adjusting parameter values of a motor braking torque and transmitting a regulating command to the motor controller based on the variation of vehicle wheel speed and braking pressure so as to control the wheel hub motor and the resistance regulator, thus stable motor braking torque is kept when the braking pressure is at a first stage so as to realize stable recycle of electrical energy, while the motor braking torque linearly changes along with the braking pressure when the braking pressure is at a second stage, so that the motor regenerative braking subsystem is prevented from causing interference in the pressure braking subsystem. The invention further relates to a control method for the vehicle compound braking system.

Description

technical field

[0001] The present invention relates to a vehicle composite braking system, in particular to a control device and a control method for a vehicle composite braking system, which controls pressure braking and motor regenerative braking, and performs stable energy recovery during the entire process of pressure braking , thereby saving energy. Background technique

[0002] In the process of traditional car braking, friction braking is usually used to convert kinetic energy into frictional heat. However, with the accelerated development of electric vehicles in recent years, more people have tried to combine motor braking torque with traditional pressure braking such as hydraulic braking. It is combined with dynamic braking, especially anti-lock hydraulic braking (ABS), and recycles the electric energy generated during the braking process of the motor. This compound braking method has received increasing attention due to the partial recovery of energy. However, m...

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