Failure-proof brake-by-wire system and control method thereof

Abstract

The invention discloses a failure-proof brake-by-wire system and a control method thereof. The failure-proof brake-by-wire system comprises an electronic control unit, a braking unit and a failure-proof unit, wherein the electronic control unit receives a brake pedal signal and a current signal collected by a Hall sensor to control the brake-by-wire and trigger the failure-proof unit, and the braking unit is used for implementing braking force and completing the braking process; the failure-proof unit is a mechanical hydraulic device and composed of a hydraulic pressure block, a friction block, a coil, a hydraulic braking pipeline and a hydraulic cylinder, when the brake-by-wire and electronic control fail, the rapid response is achieved, and reliable braking force is provided to ensure the braking safety; the failure-proof unit is as a standby braking unit of the brake-by-wire system, a hydraulic system is driven by kinetic energy of a vehicle to realize braking, and the braking safety is high; and meanwhile, the failure-proof unit is triggered by a mechanical structure, the response speed is fast, the intermittent braking after triggering is achieved, the braking locking is prevented, and the safety of the emergency braking process is guaranteed.

Description

technical field [0001] The invention relates to the field of brake-by-wire, in particular to a fail-safe brake-by-wire system and a control method thereof. Background technique [0002] The braking system is one of the important components of the car, which is directly related to the comprehensive performance of the car and the safety of life and property. Generally, drum or disc friction braking is used to convert the kinetic energy and potential energy of the car into heat energy through friction, so as to realize the deceleration of the car. or braking purposes. Although the traditional hydraulic and pneumatic service brakes can meet the requirements of the existing braking regulations, they have shortcomings such as slow response speed, non-active adjustment, and difficult integrated control, which are not suitable for the current development requirements of automobiles. [0003] The brake-by-wire is extended from the vacuum booster, and a motor is used to replace the v...

AI Technical Summary

Problems solved by technology

[0007] The EMB brake system obviously has many advantages that the traditional brake system cannot match. However, due to its short development time, there are also many problems that need to be solved urgently. System failure, because a lot of heat is generated during high-speed braking, which puts higher requirements on the stability of the motor

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