Method, device and system for diagnosing fuel evaporation leakage

A technology of fuel evaporation system and diagnostic method, which is applied in the field of diagnosis of fuel evaporation leakage, can solve problems such as fuel evaporation leakage and vehicle dissatisfaction, and achieve the effect of eliminating potential safety hazards and ensuring vehicle quality

Inactive Publication Date: 2018-06-12
JIANGLING MOTORS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the above situation, it is necessary to solve the problem in the prior art that the fuel pipeline in the car does not meet the requirements of the National VI OBD regulations due to possible leakage of fuel evaporation.

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  • Method, device and system for diagnosing fuel evaporation leakage
  • Method, device and system for diagnosing fuel evaporation leakage
  • Method, device and system for diagnosing fuel evaporation leakage

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0034] These and other aspects of embodiments of the invention will become apparent with reference to the following description and drawings. In these descriptions and drawings, some specific implementations of the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited by this limit. On the contrary, the embodiments of the present...

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Abstract

The invention provides a method, device and system for diagnosing fuel evaporation leakage. The method comprises the steps that the current working condition information of a vehicle is obtained; whenit is detected that each item of the parameters of the current working condition is within respective corresponding preset ranges, a carbon shut-off valve is controlled to turn off, and vacuumizing of a fuel pipeline is conducted through a carbon tank electromagnetic valve; the carbon tank electromagnetic valve is controlled to turn off, and whether or not an air pressure variation in a fuel evaporation system exceeds a preset air pressure variation in a preset period of time is determined; if yes, it is determined that fuel evaporation leakage amount of the fuel evaporation system exceeds the standard. According to the method, whether or not the fuel evaporation leakage amount of the fuel evaporation system exceeds the leakage amount of a 1mm equivalent leakage hole can be timely and effectively detected to ensure regulation demands of OBD fuel evaporation leakage of Light Vehicle Pollutant Emission Limits and Measurement Methods (China Sixth Stage) are met.

Description

technical field [0001] The invention relates to the technical field of automobile fuel equipment control, in particular to a diagnostic method, device and system for fuel evaporation leakage. Background technique [0002] With the continuous development of the economy and the continuous improvement of living standards, the number of cars owned by Chinese residents is also increasing year by year. Automobiles have become an indispensable and important means of transportation for people's daily travel, which provides great convenience for people's daily life. [0003] Among the whole parts of the car, the fuel system is a very important part. Because gasoline in the fuel tank is a volatile liquid, the fuel tank is usually full of gasoline vapor at normal temperature. In order to control the air pressure in the fuel tank, introduce gasoline vapor into the engine for combustion, and minimize the evaporation of gasoline vapor to In the atmosphere, an on-board refueling vapor re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
CPCG01M3/2815
Inventor 王进乔虹祝思敏张海滨
Owner JIANGLING MOTORS
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