Air pressure type electronic parking system

Abstract

The invention discloses an air pressure type electronic parking system, which relates to the technical field of automobile braking and comprises a parking air storage tank, a three-position three-way manual control valve, a two-position two-way air inlet electromagnetic valve, a relay valve, a two-position two-way air exhaust electromagnetic valve, a throttling valve, a silencer, an ECU (Electronic Control Unit), a pressure sensor and a spring braking air chamber, the pneumatic electronic parking function is achieved through the two high-speed switch valves, the throttling valve and the three-position three-way manual control valve, redundant backup of electronic parking is achieved through the three-position three-way manual control valve, and the pneumatic electronic parking device has the advantages of being simple in structure, good in controllability, high in safety and the like.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a pneumatic electronic parking system. Background technique [0002] With the popularization of automatic driving and intelligent safety technology, the automobile industry is gradually developing in the direction of electrification, networking, and intelligence. As the core safety device of the vehicle, the braking system has become a manufacturing The inevitable trend of mobile technology development. In addition to the traditional handbrake function, the electronic parking system should also have functions such as hill start assistance, dynamic braking, and slope prevention. Therefore, the electronic parking system also puts forward higher requirements for the function and performance of the parking control valve. Compared with the general application in passenger cars, due to the depth of application of CAN bus in commercial vehicles and the limitation of the func...

AI Technical Summary

Problems solved by technology

[0005] (1) When the industrial dual-electric control two-position three-way solenoid valve is directly applied to the control of the pneumatic brake system, due to the problem of response time lag, it is difficult to achieve high-speed charging and deflation, and cannot meet the dynamic parking requirements; and the industrial solenoid valve is for The adaptability to harsh environments is average, and it is easy to cause system failure problems such as valve core stuck

[0006] (2) For the solenoid valve scheme that uses long-term power-on, when encountering a sudden power-off condition, the system is difficult to maintain the current state, and the system must stop or even suddenly brake to cause an accident;

[0007] (3) When parking, if the solenoid valve leaks, it may cause the pressure to accumulate and the car will slide, thereby reducing the reliability and safety of the system

[0008] (4) Lack of redundant backup. When the electronic parking fails, the vehicle will not be able to move, and the fastening nut of the parking air chamber must be manually adjusted to release it. The operation is difficult and the working conditions are complex and harsh

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