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Brake system of automobile, automobile and control method of brake system

A braking system and automobile technology, applied in the field of automobiles, can solve problems such as loss of braking force and failure to meet the redundant performance of the braking system, and achieve the effect of improving redundant performance

Pending Publication Date: 2021-03-30
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned electro-hydraulic braking system, when the pressure supply device (boosting device and brake master cylinder) on one of the brake lines fails, the car will lose half of its braking force, which cannot meet the requirements of the current automatic driving control system. Requirements for redundant performance of the dynamic system

Method used

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  • Brake system of automobile, automobile and control method of brake system
  • Brake system of automobile, automobile and control method of brake system
  • Brake system of automobile, automobile and control method of brake system

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Embodiment Construction

[0081] The technical solution in this application will be described below with reference to the accompanying drawings.

[0082] In the existing braking system, EHB, as a popular braking system, usually includes a two-stage braking subsystem. The first-stage braking system is controlled by the controller in a wire-controlled way to control the supercharging device to provide braking force for the wheels. The second-stage braking subsystem provides braking force for the wheels by the brake master cylinder.

[0083] Regardless of whether it is in the first-stage brake subsystem or the second-stage brake subsystem, the brake master cylinder and the hydraulic cylinder adjust the pressure of the brake fluid in two independent brake lines respectively. The braking force of the 4 wheels of the car. Specifically, by controlling the pressure of the brake fluid in the first brake pipeline to adjust the braking force applied to the first group of wheels, and by controlling the pressure o...

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Abstract

The invention provides a brake system of an automobile, the automobile and a control method of the brake system so as to improve the redundancy performance of the brake system. The scheme of the invention is suitable for intelligent automobiles, new energy automobiles or traditional automobiles and the like. Specifically, the scheme of the invention relates to the improvement of the brake system in the automobile. According to the brake system, a first control valve 130 is connected with a first brake pipeline 111 and a second brake pipeline 121, so that when the first control valve 130 is ina conducting state, the first brake pipeline 111 is communicated with the second brake pipeline 121, brake fluid between the two brake pipelines can circulate, and the redundancy performance of the brake system can be improved. The situation that in an existing braking system, the first brake pipeline 111 and the second brake pipeline 121 are two independent brake pipelines, and after a pressure providing device (a pressurizing device and a braking main cylinder) on one brake pipeline fails, the automobile loses half of braking force is avoided.

Description

technical field [0001] The present application relates to the field of automobiles, and more specifically, to a braking system of an automobile, a control method of the automobile and the braking system. Background technique [0002] The braking system of a car is a system that applies a certain braking force to the wheels of the car to perform a certain degree of mandatory braking. The function of the braking system is to make the driving car decelerate or even stop forcibly according to the requirements of the driver or the controller, or to make the stopped car stably park under various road conditions (for example, on a slope), or to make the The speed of the car traveling downhill remains steady. With the development of automobile electrification and intelligence, automobiles have higher and higher requirements for braking systems. For example, with the improvement of the level of automatic driving, the dependence of the operation of the braking system on the driver i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/17B60T13/68B60T13/14
CPCB60T8/17B60T13/68B60T13/142B60T8/885B60T2220/04B60T2270/402B60T2270/413B60T2270/88B60T13/745B60T13/686B60T13/165B60T7/042B60T8/171
Inventor 张永生刘栋豪刘晓康张伟
Owner HUAWEI TECH CO LTD
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