A vehicle integrated electro-hydraulic braking system

Abstract

The invention relates to a vehicle integrated electro-hydraulic braking system, which is composed of a brake pedal, a brake master cylinder and its electric brake booster, a pedal stroke simulator, a hydraulic control unit, a brake wheel cylinder and a brake pipeline composition. The present invention proposes that the electric brake booster and manpower independently or superimposedly act on the plunger rod of the master brake cylinder piston, thereby pushing the brake master cylinder piston to perform braking. The vehicle integrated electro-hydraulic braking system of the present invention can work in power-assisted braking mode, active braking mode, regenerative auxiliary braking mode, and manual backup braking mode according to different braking requirements. The brake master cylinder is connected to the hydraulic control unit through two normally open isolation valves and connected to the pedal stroke simulator through a commonly used simulator valve. When the vehicle needs to implement regenerative braking, the brake master cylinder is connected to the The hydraulic control unit is isolated, and the brake master cylinder is communicated with the pedal travel simulator through the simulator valve, and the brake pedal feel is provided by the pedal travel simulator.

Description

technical field [0001] The invention is a vehicle integrated electro-hydraulic braking system, specifically, a novel braking system integrating the functions of electric braking power assist braking, active braking, regenerative braking and human backup braking. Background technique [0002] With the continuous advancement of science and technology and the improvement of people's living standards, the safety, energy saving and environmental protection performance of automobiles are getting more and more attention, and the automobile braking system is one of the main research directions of automobile active safety. However, for the traditional hydraulic braking system used in passenger cars and other light vehicles, which account for about 80% of the total number of automobiles, its structure has seriously restricted the electronicization and intelligence of automobiles and the braking energy of new energy vehicles. Use of recycling technology. [0003] The traditional hydra...

AI Technical Summary

Problems solved by technology

However, for the traditional hydraulic braking system used in passenger cars and other light vehicles, which account for about 80% of the total number of automobiles, its structure has seriously restricted the electronicization and intelligence of automobiles and the braking energy of new energy vehicles. Use of Recycling Technology

[0003] The traditional hydraulic braking system has three obvious deficiencies: one is that active braking cannot be implemented conveniently (the so-called "active braking" refers to the fact that all or part of the wheels can still be controlled when the driver does not step on the brake pedal. braking), so it is difficult to meet the active braking requirements of chassis active control systems such as adaptive cruise control and electronic stability programs; second, as long as the driver steps on the brake pedal, the friction brake will start to work and consume energy, which seriously hinders the The braking energy recovery of new energy vehicles such as electric vehicles and hybrid vehicles is realized; the third is that the traditional hydraulic braking system is vacuum assisted, but there is no vacuum source on new energy vehicles, and a separate vacuum source is required to meet the functional requirements of the system. lead to complex structure and high cost

The more functions are added to the brake system, the more complex the structure of the brake system becomes, which also increases its cost and reduces its reliability

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