Diaphragm type electric control pressure executing mechanism for electronic parking system

Abstract

The invention discloses a diaphragm type electric control pressure executing mechanism for an electronic parking system, which comprises an air inlet, a release electromagnetic valve, a parking electromagnetic valve, an air inlet electromagnetic valve, an exhaust electromagnetic valve, a plunger pump and an air outlet cavity, one end of the electromagnetic valve is communicated with the release electromagnetic valve, the other end of the electromagnetic valve is communicated with the release electromagnetic valve, the parking electromagnetic valve and the plunger pump, the release electromagnetic valve is provided with a release control pipe communicated with the plunger pump, and the parking electromagnetic valve is provided with a parking control pipe communicated with the plunger pump. The diaphragm type electric control pressure executing mechanism for the electronic parking system is simple in structure, simple in assembly process, high in cost performance, more beneficial to automatic production, high in sensitivity due to the adoption of the diaphragm type structure, fine in pressure adjustment and not prone to locking during braking when emergency braking is achieved, the parking anti-locking function is achieved more easily, braking comfort is good, and the service life of the braking system is prolonged. And the safety is high.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesive testing, in particular to a diaphragm-type electronically controlled pressure actuator for an electronic parking system. Background technique [0002] EPB (Electrical Park Break) electronic parking brake system refers to the system that uses electronic control to realize the parking brake of the vehicle. It has the advantages of small size, complete functions and high comfort. The traditional parking system is mechanical and needs to be The road is connected to the handbrake valve in the cab, through the handbrake valve to control the intake and exhaust of the relay valve or the quick release valve on the chassis, and the parking and release can be realized manually. It is beautiful and has a single function, and can only realize simple manual parking and manual release functions. [0003] With the development and promotion of electronic parking brake systems, more and more commercial v...

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Problems solved by technology

[0002] EPB (Electrical Park Break) electronic parking brake system refers to the system that uses electronic control to realize the parking brake of the vehicle. It has the advantages of small size, complete functions and high comfort. The traditional parking system is mechanical and needs to be The road is connected to the handbrake valve in the cab, through the handbrake valve to control the intake and exhaust of the relay valve or the quick release valve on the chassis, and the parking and release can be realized manually. It is beautiful and has a single function. It can only realize simple manual parking and manual release functions.

[0003] With the development and promotion of electronic parking brake systems, more and more commercial vehicles are now equipped with electronic parking brake systems in the market. However, due to the hardware cost of the actuator, the current product price is still relatively high, which seriously hinders the development of electronic parking brake systems. At the same time, the parking brake system is different from the service brake system due to the different working conditions. Generally, when the service brake is implemented, the driver is on the car, but in the car In most cases, when the parking brake is applied, the driver is not in the car, so it is more difficult to deal with dangerous situations. The control actuator does not have the function of state maintenance. When the solenoid valve leaks, if the system software algorithm does not monitor it, there will be a risk of parking state change.

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