Airtightness detection device and detection method of valve opening

Abstract

The invention relates to the technical field of vehicle safety, in particular to an airtightness detection device and detection method of a valve opening. The airtightness detection device comprises an air source, a low pressure air inlet valve, an air inlet sealing cavity, an exhaust sealing cavity, a first low pressure measurement valve, a flowmeter, a low pressure exhaust valve, a controller and a first driving mechanism which is used for driving a valve rod of a normally open valve to move; the air source, the low pressure air inlet valve and an air inlet of the air inlet sealing cavity are communicated with one another in sequence; an air outlet of the exhaust sealing cavity is communicated with the first low pressure measurement valve, the flowmeter and the low pressure exhaust valvein sequence; the exhaust sealing cavity is formed above the air inlet sealing cavity, the normally open valve is arranged inside the exhaust sealing cavity, and an inlet of a valve base of the normally open valve is communicated with an air outlet of the air inlet sealing cavity; an outlet of a valve body of the normally open valve is communicated with the exhaust sealing cavity. The airtightnessdetection device solves the technical problems that airtightness detection of a valve opening of an existing normally open valve is not mature, and the airtightness of the valve opening of the normally open valve cannot be well detected.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to a valve port air tightness detection device and detection method. Background technique [0002] The anti-lock brake system is referred to as ABS, and the electronic stability control system is referred to as ESC. Among them, ABS and ESC give different optimal braking forces to each wheel according to the friction between the tire and the road surface during vehicle driving. Brake fluid pressure method to achieve the purpose of braking. ABS / ESC uses the switch of the solenoid valve to realize the adjustment of the brake pressure of the car, so as to control the driving stability of the car. However, the current domestic manufacturing base of ABS / ESC solenoid valves is relatively weak. Among them, including normally open valves, the air tightness of the valve port structure of normally open valves is not yet mature, and the valve port of the open valve cannot be detected...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a valve port airtightness detection device to alleviate the technical problem that the valve port airtightness detection of the existing normally open valve is immature and cannot detect the airtightness of the valve port when the valve is open

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