Air pressure adjustable parking brake

Abstract

The invention discloses a pressure-adjustable parking brake apparatus which comprises an air storage tank, pressure sensors, spring energy storage brake cylinders and an electric control unit. The air storage tank, the pressure sensors and the spring energy storage brake cylinders are sequentially connected with one another by air channels, the electric control unit is electrically connected with the pressure sensors, a two-position three-way double-coil electromagnetic valve, a relay valve and an electromagnetic valve are further sequentially serially connected onto the air channels among the air storage tank and the pressure sensors, an input end of the two-position three-way double-coil electromagnetic valve is connected with an output end of the air storage tank, a control input end of the relay valve is connected with an output end of the two-position three-way double-coil electromagnetic valve, a pressure input end of the relay valve is connected with the output end of the air storage tank, an output end of the relay valve is connected with an input end of the electromagnetic valve, an output end of the electromagnetic valve is connected with the pressure sensors, and both the two-position three-way double-coil electromagnetic valve and the electromagnetic valve are electrically connected with the electric control unit. The pressure-adjustable parking brake apparatus has the advantages of good parking brake smoothness and high reliability.

Description

technical field [0001] The invention belongs to the technical field of brake systems of medium and heavy vehicles, in particular to an air pressure adjustable parking brake device. Background technique [0002] With the improvement of people's living standards, the number of private cars continues to rise, and the traffic jams during the peak hours of commuting and commuting have become more frequent, the safety of automobile braking has attracted more and more attention. Traditional handbrakes are gradually eliminated by people because they cannot meet the needs of special groups of people and are prone to slipping if they are inexperienced when starting on a slope. The pneumatic electronic parking brake system collects and processes various sensor information, and controls the solenoid valve to inflate and deflate the brake air chamber in a timely manner, so as to realize the parking release and parking brake of the car. At present, most medium and heavy vehicles use pneu...

AI Technical Summary

Problems solved by technology

[0004] 1. Its pneumatic integrated electronic parking brake valve has only two working positions, which correspond to the two states of parking and releasing the parking respectively. The control is difficult and the smoothness of starting on the slope is not good enough;

[0005] 2. Because there are only two states of parking and release of parking, compared with the traditional manual-operated pneumatic parking brake system, the air consumption of the parking brake system is not reduced. Under certain conditions, such as congested road conditions, it is easy to cause insufficient air pressure and affect braking safety;

[0006] 3. Using a special two-position two-way normally open solenoid valve, the development cycle is long and the production cost is high

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