Air pressure adjustable electronic parking brake system

Abstract

The invention discloses an air pressure adjustable type electronic parking braking system. The air pressure adjustable type electronic parking braking system comprises an air storage tank, an air pressure sensor, a parking braking air chamber and a parking braking controller, wherein the air storage tank, the air pressure sensor and the parking braking air chamber are connected in sequence through an air channel, and the parking braking controller is electrically connected with the air pressure sensor. A first solenoid valve is further in series connection with an air channel positioned between the air storage tank and the air pressure sensor, a second solenoid valve is connected at the back of the parking braking air chamber through an air channel, and the first solenoid valve and the second solenoid valve are electrically connected with the parking braking controller. The electronic parking braking system is good in smoothness and high in reliability, can simultaneously meet the requirements of driving comfort and safety and can be widely suitable for middle-sized and heavy automobiles.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, in particular to an air pressure adjustable electronic parking brake system. Background technique [0002] In order to overcome the disadvantages of insufficient operational safety and poor adaptability of the pneumatic electronic parking brake system of medium and heavy vehicles, a Chinese invention patent application (application number 201310025781.5, published on May 8, 2013) discloses a pneumatic electronic parking brake system. An electronic parking brake device, which includes an air reservoir, a pressure switch, a parking brake chamber, and a brake controller electrically connected to the pressure switch. The pneumatic integrated electronic parking brake valve and air pressure sensor are also arranged in sequence on the air circuit between the dynamic air chambers, and the pneumatic integrated electronic parking brake valve and air pressure sensor are respectively connect...

AI Technical Summary

Problems solved by technology

[0003] 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;

[0004] 2. Because there are only two states of parking and releasing the 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.

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