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Method and system for detecting fuel system leaks

A fuel system, fuel technology, applied in the field of leak detection, which can solve the problems of energy consumption, a large number of additional components, etc.

Active Publication Date: 2017-12-26
PLASTIC OMNIUM ADVANCED INNOVATION & RES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pumps can generate vacuum or pressure on demand, but at the cost of extra energy consumption and a lot of extra components

Method used

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  • Method and system for detecting fuel system leaks
  • Method and system for detecting fuel system leaks
  • Method and system for detecting fuel system leaks

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Experimental program
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Embodiment Construction

[0036] In a specific embodiment of the present invention, the first pair of measured values ​​(p 1 ,T 1 ) and the second pair of measured values ​​(p 2 ,T 2 ) to determine the integrity (no leaks) of the fuel system, the second pair of measurements taken after a controlled introduction of a certain amount of heat and / or pressure into the fuel tank. The invention is also based on the realization that this determination can be achieved without the use of an engine or special heat and / or pressure generating means, but by using such heat / pressure sources available on board the vehicle, preferably a (plug-in type) hybrid vehicles.

[0037] can be calculated by calculating the four measured variables (p 1 ,T 1 ,p 2 ,T 2 ) and comparing this function with predetermined values ​​to determine the integrity of the fuel system.

[0038] As an example, the predetermined value may be the ratio of two pressure-temperature ratios determined before and after energizing the fuel system...

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Abstract

The invention proposes a method for detecting leaks in a fuel system of a combustion engine, wherein the fuel system includes a fuel tank. The method comprises the steps of: acquiring a first set of data comprising at least pressure data measured in the fuel system at a first time; adding energy to a fluid contained in the fuel system, said energy being existing on the vehicle generating or wasting unused energy by means for other purposes; obtaining a second set of data comprising at least pressure data measured in the fuel system at a second time; by calculating based on said first and second A predetermined function of set of data is used to determine the presence / absence of a leak in the fuel system.

Description

technical field [0001] The invention relates to leak detection of a liquid fuel system, preferably on board a hybrid vehicle, when the hybrid vehicle is running in electric mode. Background technique [0002] Leak detection systems for fuel tanks and entire fuel systems are widely and even mandatory in modern road vehicles equipped with internal combustion engines. Existing leak detection systems use, for example, the vacuum generated by an internal combustion engine to reduce the pressure inside the fuel tank. The fuel tank is considered to be free of leaks when it is detected that the reduced pressure remains constant for a certain period of time. [0003] As the demand for fuel saving and alternative fuel sources continues to lead technology to electric vehicles, a class called plug-in hybrid electric vehicles (English for "plug-in hybrid electric vehicles", abbreviated as PHEV) was born. Vehicles. The vehicle is designed to use all-electric mode for a predetermined di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/08B60K15/035F02D41/00F01P5/02
CPCF02M25/0818B60K11/02B60K15/03504B60K2001/005B60K2015/03514B60K2015/03427B60K15/035F01P5/02F02D41/003G01M3/26
Inventor 比约恩·克里尔安托万·肖锡南大卫·希尔
Owner PLASTIC OMNIUM ADVANCED INNOVATION & RES SA