Electronic control relay valve assembly of anti-lock brake system

Abstract

The invention discloses an electronic control relay valve assembly of an ABS (anti-lock brake system). The electronic control relay valve assembly of the ABS comprises a valve body and a solenoid valve group; a pressure sensor used for detecting the pressure of brake air chambers is arranged in the valve body; the valve body comprises two main air inlets, four air outlets and an exhaust port; two air chambers are symmetrically distributed in the valve body; one of the two brake chambers is respectively communicated with one of the two main air inlets, two of the four air outlets and the exhaust port; a valve capable of controlling whether the main air inlet is communicated with the corresponding air outlets or not is arranged in each air chamber; a main control piston capable of abutting on the corresponding valve is arranged in each air chamber; the valves are controlled by the solenoid valve group connected with the valve body; the internal valve operation of the valve body is controlled through the solenoid valve group, and the pressurization working condition, the pressure-maintained working condition and the pressure-reduced working condition are realized through an internal logic operation method and threshold value control; the electronic control relay valve assembly is adapted to various working conditions; as an electronic control air brake vehicle is adopted, the reaction to stepping of a driver is more sensitive, and judgment on brake performance is more accurate; brake can be realized more rapidly, and the defects that the mechanical brake response time is slow, the brake comfort is poor and the like are eliminated.

Description

technical field [0001] The invention relates to an automobile brake control valve assembly, in particular to an ABS electric control relay valve. Background technique [0002] Anti-lock braking system ABS, the full name is Anti-lock Brake System, is a car safety control system that has the advantages of preventing wheel lock, shortening the braking distance of the car, reducing tire wear, and preventing the car from running off and flicking. Most cars at home and abroad are now equipped with ABS devices, which greatly improves the safety braking performance of their wheels. The mechanical parts in the ABS system are basically pneumatically connected. By changing the opening and closing of the valve, the air pressure of the brake chamber is changed to realize the simulated "point braking" to prevent the wheels from locking up. At present, the existing ABS electronically controlled relay valves all adopt air-controlled air brakes, such as a double-channel electrically contr...

AI Technical Summary

Problems solved by technology

At present, the existing ABS electronically controlled relay valves all adopt air-controlled air brakes, such as a double-channel electrically controlled relay valve for ABS disclosed in patent CN202429194 U. Braking in a dynamic way, because the change of the braking force of the brake chamber is affected by the response time of the mechanical brake and the transmission time of the high-pressure gas, resulting in a slow response time and poor braking comfort

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