A distributed electronic hydraulic braking system

Abstract

The invention discloses a distributed electronic hydraulic braking system, comprising four wheel braking actuators, a driver's pedal feeling simulation mechanism, an electronic control unit and a backup miniature battery; the electronic control unit outputs current to electromagnetic portions of the wheel braking actuators, the current passes through coils wound on electromagnet sleeves in the electromagnetic portions to generate magnetic force such that moving electromagnets in the electromagnetic portions drive hydraulic cylinder pistons in hydraulic portions to axially move, and movement of the hydraulic cylinder pistons drives a braking fluid in hydraulic cylinder blocks to flow between the hydraulic cylinder blocks and corresponding wheel braking cylinders so as to brake corresponding wheels. The various parts in an existing automobile brake system, such as a brake master cylinder, a vacuum booster, an oil cup, major part of pipelines, electromagnetic valves, motors, accumulators and oil pumps are omitted; the problem that an existing braking system is complex in structure, high in vibrational noise, low in active pressure buildup speed, and poor in pressure regulation precision is solved.

Description

technical field [0001] The invention belongs to the technical field of automobile braking systems, and relates to a distributed electronic hydraulic braking system. More precisely, the invention relates to an electronic hydraulic braking system with four sets of independent wheel braking actuators. Background technique [0002] The distributed electro-hydraulic brake system is a distributed wet brake-by-wire system. The distributed feature makes it less likely that all wheel brake actuators will fail at the same time. At present, the most widely used brake system is the vacuum booster system. Due to its simple structure and stable performance, it has dominated the brake system industry for many years. With the development of new energy vehicles and smart vehicles, new requirements are put forward for the automotive braking system: reduce and cancel the dependence on engine vacuum; be able to achieve low-noise active conventional braking; realize the driver's braking feeling...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of complex structure, large vibration and noise, active pressure build-up not fast enough and pressure regulation not accurate enough in the existing braking system, the present invention proposes a distributed electronic hydraulic braking system, which cancels the brake master cylinder, vacuum booster It can realize rapid active pressure build-up, precise pressure adjustment, full decoupling of pedal force, low vibration and noise, and failure protection. function of

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