Air tightness detection device and method

A technology of air tightness detection and exhaust sealing, which is applied in the direction of measuring device, fluid tightness test, liquid tightness measurement using liquid/vacuum degree, etc. Problems such as immature air tightness testing of normally closed valves, etc., to achieve the effect of simple structure, easy function, and high measurement accuracy

Inactive Publication Date: 2018-08-14
TIANJIN TRINOVA AUTOMOTIVE TECH CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of airtightness detection device, to alleviate the technical problem of the airtightn

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  • Air tightness detection device and method
  • Air tightness detection device and method

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[0040] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention relates to the technical field of automobile safety, in particular to an air tightness detection device and method. The device comprises an air source, a low-pressure air inlet valve, anair inlet sealing cavity, an air discharge sealing cavity, a first low-pressure measurement valve, a flowmeter, a low-pressure air discharge valve, a controller and a first driving mechanism; the airsource, the low-pressure air inlet valve and an air inlet of the air inlet sealing cavity are communicated in sequence; an air outlet of the air discharge sealing cavity is communicated with the first low-pressure measurement valve, the flowmeter and the low-pressure air discharge valve in sequence; the air discharge sealing cavity is formed below the air inlet sealing cavity, a partial structureof a normally-closed valve is arranged in the air inlet sealing cavity, and an inlet of a valve base of the normally-closed valve is communicated with the air inlet sealing cavity; an outlet of the valve base of the normally-closed valve can be communicated with the air discharge sealing cavity, and the outlet of the valve base can be closed through moving iron. By means of the air tightness detection device, the technical problem is solved that whole air tightness detection of an existing normally-closed valve is immature, and the air tightness of the normally-closed valve can be well detected.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to an air tightness detection device and a 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 closed valves, the airtightness of the overall structure of normally closed valves is not yet mature, and the airtightness of normally closed valves cannot be well d...

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Application Information

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IPC IPC(8): G01M3/28
CPCG01M3/2876
Inventor 郭国强赵洵戚晓伟李晓杰郭向飞
Owner TIANJIN TRINOVA AUTOMOTIVE TECH CO LTD
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