Real-time monitoring and automatic regulating system of automotive brake clearance

Abstract

The invention discloses a real-time monitoring and automatic regulating system of automotive brake clearance, comprising a brake clearance sensor, a brake system working condition sensor, a brake system working condition sensor, an electrical control unit (ECU), a terminal display device, an electric adjusting arm, wherein, the brake clearance sensor is arranged on a brake shoe component of a drum-type cam brake; the brake system working condition sensor is arranged on an air braking main valve; the ECU is used for collecting and processing brake clearance of each brake; the terminal display device is used for displaying brake clearance value in real time and setting preset clearance and alarming failure; the electric adjusting arm is used for automatically adjusting the execution mechanism of brake clearance; and a signal transmission line of the ECU is used for connection. The system of the invention real-time monitors and intensively displays the brake clearance of each brake in the traveling process of the automobile, can realize feedback bidirectional regulation and failure alarm of the brake clearance, and timely find and reduce potential safety hazard caused by unreasonable brake clearance; and the preset clearance of each brake is set by terminal display equipment, thus the operation is more convenient. The system of the invention has simple structure, small volume and lower cost and is more reliable.

Description

technical field [0001] The invention relates to an automobile brake system, in particular to an automobile brake gap real-time monitoring and automatic adjustment system. Background technique [0002] The reliability of the automobile brake system is the key factor for the safe driving of the automobile, and ensuring a reasonable brake clearance is a necessary condition for the brake system to work on the whole vehicle. For the air brake system equipped with S-type cam drum brakes, due to frequent braking during driving, the brakes will heat up, and the expansion of the brake drum, brake shoe assembly with brake linings, etc. will cause the brake clearance become smaller; and long-term use will cause the brake clearance to become larger due to the wear of the brake lining. If it is not adjusted in time, it will cause the phenomenon of point brake, drag brake, brake drum out of round, brake drum crack, etc., which will cause unsafe hidden danger to driving. Therefore, it is...

AI Technical Summary

Problems solved by technology

However, there are some defects in this method: the sensitivity and reliability of the gas flow sensor are affected by factors such as the sensitivity and hysteresis of the compressed gas to the environment, and the volume of this type of sensor is relatively large; in addition, it only affects the brake lining. Alarm for the excessive wear of the disc, and no display of the brake clearance value during the running of the vehicle

[0004] In fact, it is very important to monitor and display the braking clearance of each brake, especially for heavy-duty trucks and buses, which can detect possible safety hazards in the brakes at an early stage and minimize accidents. Patents US479214, US4800991, US6135242, etc. It adopts a mechanical brake clearance indicator device based on the stroke of the push rod. It is extremely inconvenient to observe each wheel one by one every time it is parked. Patents US5252735 and US6341670 use electronic sensors and microcomputer processing to monitor and concentrate Display the braking clearance of each brake of the vehicle, but they are still based on the perception of the change in the push rod stroke, and cannot effectively eliminate the aforementioned analysis such as the excess clearance and elastic rotation angle of the brake arm housing, and the elastic rotation angle of the brake shoe , the elastic rotation angle of the cam drive shaft, etc. affect the monitoring results.

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