A composite brake-by-wire system and control method

Abstract

The invention relates to a composite brake-by-wire system and a control method. The brake-by-wire system includes a brake-by-wire device with a modular design, a data acquisition unit and a controller; the brake-by-wire device includes a brake disc, a left friction plate, Right friction plate, caliper assembly, first electromagnetic coil assembly, fixed support, second electromagnetic coil assembly, spring, wedge column assembly, magnetostrictive rod, piston; first electromagnetic coil assembly, second electromagnetic coil assembly The coil assembly, the brake pedal sensor assembly, the wheel speed sensor, the vehicle speed sensor, and the gyroscope are all electrically connected to the controller; the present invention uses electromagnetic suction and a wedge-type booster mechanism to quickly eliminate the braking gap of the brake and establish the braking pressure. The magnetostrictive actuator is used to quickly adjust the braking torque, prevent the vehicle from brake lock and maintain vehicle stability, and has a high response frequency and control accuracy, which can effectively shorten the braking distance and improve the driving safety of the vehicle .

Description

technical field [0001] The invention relates to the field of automobile brakes, in particular to a compound brake-by-wire system and a control method. Background technique [0002] Brake-by-wire technology is a new type of braking technology that has emerged in recent years. It does not rely on mechanical or hydraulic connections between the brake and the brake pedal. It uses wires to replace part or all of the brake pipelines, and controls the electronic control through the controller. The components are used to control the braking force and realize the stable and reliable braking control of the car. At present, the brake-by-wire system mainly includes two types: electro-hydraulic brake system (EHB) and electro-mechanical brake system (EMB). The brake-by-wire system is conducive to the optimization of the braking performance of the whole vehicle, and can be easily integrated with other electronic control systems such as ABS, ASR, ESP, etc., so it has a broad development sp...

AI Technical Summary

Problems solved by technology

Since the original hydraulic pipeline is retained, the technical problem of slow brake response caused by long hydraulic pipeline is still not solved

At the same time, due to the elastic deformation of the brake pipeline under the action of high-pressure brake fluid, the pressure of the brake fluid in the brake pipeline will fluctuate, which will greatly affect the precise control of vehicle braking.

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