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 comprises a brake-by-wire device adopting modular design, a data acquisition unit and a controller, wherein the brake-by-wire device comprises a brake disc, a left friction plate, a right friction plate, a caliper assembly, a first electromagnetic coil assembly, a fixed support, a second electromagnetic coil assembly, a spring, a wedge column assembly, a magnetostriction rod and a piston; and the first electromagnetic coil assembly, the second electromagnetic coil assembly, a brake pedal sensor assembly, a wheel speed sensor, a vehicle speed sensor and a gyroscope are all electrically connected with the controller. The brake clearance of a brake is quickly eliminated and the brake pressure is quickly established by adopting the electromagnetic attraction force and the wedge-type reinforcement mechanism, the brake torque is quickly adjusted by adopting a magnetostrictive actuator, a vehicle is prevented from being braked and locked, the stability of the vehicle is kept, the response frequency and the control precision are high, the brake distance can be effectively shortened, and the vehicle driving safety is improved.

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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