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Leak detection device and method for fuel evaporation system

A technology of fuel evaporation system and leak detection device, which can solve the leakage of fuel evaporation system by detecting the appearance of fluid at the leak point, measuring the acceleration and deceleration rate of fluid, and using liquid/vacuum degree for liquid tightness measurement. Difficult to troubleshoot problems

Active Publication Date: 2021-06-08
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a fuel evaporation system leakage detection device and method, aiming to solve the technical problem that the leakage point of the fuel evaporation system is difficult to check

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  • Leak detection device and method for fuel evaporation system
  • Leak detection device and method for fuel evaporation system
  • Leak detection device and method for fuel evaporation system

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Embodiment Construction

[0054] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] refer to figure 1 , figure 1 It is a structural block diagram of the first embodiment of the fuel evaporation system leakage detection device of the present invention; the device includes: a gas storage tank 100, an electric pump 200, a pressure sensing unit 300, a voltage control unit 700 and a colored smoke generator 400; wherein,

[0056] The input end of the electric pump 200 is connected to the output end of the gas storage tank 100 and the output end of the colored smoke generator 400, the controlled end of the electric pump 200 is connected to the control end of the voltage control unit 700 connected, the output end of the electric pump 200 is connected to the input end of the pressure sensing unit 300, the output end of the pressure sensing unit 300 is connected to the receiving end of the voltage cont...

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Abstract

The invention belongs to the technical field of fuel oil leakage detection, and discloses a leakage detection device for a fuel oil evaporation system. The device includes: an electric pump for charging gas in the gas storage tank into the fuel oil evaporation system; a pressure sensor unit, used to detect the current pressure value inside the fuel evaporation system; a voltage control unit, used to receive the current pressure value fed back by the pressure control unit, and judge the Whether there is an unqualified leakage point in the fuel evaporation system; the colored smoke generator is used to output colored smoke to the fuel evaporation system when there is an unqualified leakage point in the fuel evaporation system to indicate the location of the leakage point. The invention also discloses a leakage detection method of the fuel evaporation system, which makes it easy to eliminate the leakage point of the fuel evaporation system, improves detection efficiency, and saves maintenance procedures.

Description

technical field [0001] The invention relates to the technical field of fuel oil leakage detection, in particular to a fuel oil evaporation system leakage detection device and method. Background technique [0002] The vehicle OBD (On Board Diagnostics) uses the principle of negative pressure detection to detect the leakage fault of the fuel evaporation system. After the fuel evaporation system is found to have a leak of more than 0.5 or 1mm small hole, it is necessary to check the leak point. The fuel evaporation system of the National VI standard has many parts and complicated pipelines, and the leakage is small, and the colorless gasoline vapor cannot be eliminated with the naked eye. The OBD of the whole vehicle can detect the leakage point, but it cannot know which component or which pipeline has the leakage point. At present, the leak point investigation can only be based on the experience of maintenance personnel, replace the pipelines and components one by one, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/26G01M3/20
CPCG01M3/20G01M3/26
Inventor 吴昌庆马骁宇刘聪聪
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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