Air pressure type electronic parking system with emergency braking function

Abstract

The invention discloses an air pressure type electronic parking system with an emergency braking function. The air pressure type electronic parking system comprises a parking braking controller (5) electrically connected with a rear service braking unit and further comprises an electronic control switch (13), a left wheel speed sensor (14) and a right wheel speed sensor (15), all of which are electrically connected with the parking braking controller (5). The rear service braking unit comprises an air storage tank (1), a relay valve (6), a first ABS electromagnetic valve (7), a left parking braking air chamber (11), a second ABS electromagnetic valve (8) and a right parking braking air chamber (12). By the adoption of the air pressure type electronic parking system, wheels can be prevented from being locked in the emergency braking process, stability is good, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of parking brake systems for medium and heavy vehicles, in particular to a pneumatic electronic parking system equipped with emergency braking. Background technique [0002] The safety and comfort of automobiles, especially the stability of vehicles during emergency braking, has attracted more and more attention. According to investigations, 2 / 3 of major traffic accidents are all related to sideslip, tail flick, and instability, and 25% of traffic accidents with casualties and 60% of fatal traffic accidents are mainly attributed to sideslip. The main reason for sideslip and tail flick is that the wheels are locked. After the wheel is locked, the lateral adhesion of the wheel is almost zero, and it is easy to lose stability. In an emergency, it is difficult for the driver to correctly control the unstable vehicle due to panic. Therefore, it is very important to prevent wheel lock and ensure vehicle stabilit...

AI Technical Summary

Problems solved by technology

[0005] 1. The parking brake uses a normal normally closed solenoid valve, which has a small diameter, a large lag, and a slow response, which cannot meet the requirements of the anti-lock function;

[0006] 2. The left and right parking brake air chambers are only controlled by a set of solenoid valves. During emergency braking, the braking force of the left and right wheels cannot be independently controlled, and the stability is not good

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