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Exhaust and detection method of hydraulic brake circuit of brake-by-wire system

A hydraulic brake and brake-by-wire technology, applied in the direction of brake safety system, brake, brake components, etc., can solve problems such as increased workload, vehicle brake safety accident, brake risk, etc., to simplify exhaust The effect of operation, improving the pressure building capacity, and improving the exhaust efficiency

Active Publication Date: 2022-05-03
DONGFENG MOTOR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hydraulic braking system of the vehicle relies on high-pressure brake fluid to push the piston of the caliper to perform braking. If air is mixed into the hydraulic braking pipeline, it will lead to insufficient pressure build-up in the pipeline, and insufficient braking force of the caliper will cause braking risks.
After the vehicle is filled with liquid and exhausted, it cannot be automatically inspected by the vehicle for filling and exhausting the vehicle. If there is poor exhaust, it may easily cause customers to complain about the pedal feeling, and repeated exhausting will increase the workload. In severe cases, it will cause vehicle braking safety. ACCIDENT

Method used

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  • Exhaust and detection method of hydraulic brake circuit of brake-by-wire system
  • Exhaust and detection method of hydraulic brake circuit of brake-by-wire system

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 As shown in -2, the exhaust and detection method of the hydraulic brake circuit of the brake-by-wire system is: after the vehicle is started to add fluid and exhaust, first pressurize the left front wheel pipeline (the third brake pipeline 13) exhaust.

[0020] The ESC controller controls the first pressure limiting valve 5 to close, the second pressure limiting valve 6 to open, the first boost valve 7 to close, the second boost valve 8 to close, the third boost valve 9 to open, and the fourth boost valve 10 closure. Brake fluid cannot enter the first brake pipeline 11 , the second brake pipeline 12 and the fourth brake pipeline 14 . The electric power-assisted driving mechanism pushes the first piston 3.1 of the brake master cylinder 3 to move forward, and the brake fluid is discharged from the liquid outle...

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Abstract

The invention discloses an exhaust and detection method of a hydraulic brake circuit of a brake-by-wire brake system. The brake fluid of the brake master cylinder is sequentially pressurized and introduced into a single brake pipeline where each brake caliper is located, and the single brake fluid is sequentially controlled. Exhaust the brake pipeline; disconnect the brake master cylinder from all brake pipelines, perform an exhaust test on the brake master cylinder, and judge whether the exhaust of the brake master cylinder is qualified. Exhaust the brake pipeline again until the exhaust of the brake master cylinder is qualified; introduce the brake fluid after the brake master cylinder is pressurized into a single brake pipeline in turn, and judge whether the piston displacement before and after the brake master cylinder is pressurized If it meets the exhaust standard, if it does not meet the exhaust standard, perform the exhaust operation on a single brake pipeline until the piston displacement before and after the pressurization of the brake master cylinder connected to the brake pipeline meets the exhaust standard. The detection method of the present invention can automatically complete system exhaust detection, and can lock the location of poor exhaust, increase the exhaust steps in a targeted manner, and avoid repeating the entire exhaust process.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a method for exhausting and detecting a hydraulic brake circuit of a brake-by-wire system. Background technique [0002] The vehicle hydraulic braking system relies on high-pressure brake fluid to push the caliper piston to perform braking. If air is mixed into the hydraulic brake pipeline, it will lead to insufficient pressure build-up in the pipeline, and the insufficient braking force of the caliper will cause braking risks. After the vehicle is filled with liquid and exhausted, it cannot be automatically inspected by the vehicle for filling and exhausting the vehicle. If there is poor exhaust, it may easily cause customers to complain about the pedal feeling, and repeated exhausting will increase the workload. In severe cases, it will cause vehicle braking safety. ACCIDENT. Contents of the invention [0003] The purpose of the present invention is to solve the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/22
CPCB60T17/222
Inventor 尹佳超徐小卫王平陈世荣闫涛卫
Owner DONGFENG MOTOR GRP
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