Method and device for detecting the blockage of a gasoline vapor filter purge valve
AssigneesContinental Automotive France, Continental Automotive GmbH
InventorThierry Collet
Life of this patent
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Abstract
A method for detecting the blockage of a gasoline vapor filter (3) bleed valve (4) for a motor vehicle internal combustion engine (1), includes at least one sequence of the following steps: a step of controlling the opening of the bleed valve (4), a step of measuring at least one operating parameter of the internal combustion engine (1), which is related to the mixture taken into the engine, a step of calculating an indicator, via statistical signal-processing on at least one measured parameter, and of comparing the indicator to a predetermined value. A detection device capable of implementing the method is described.
Claims12
A method for detecting blockage of a purge valve of a gasoline vapor filter for a vehicle internal combustion engine,
- the method comprising at least one sequence of the following steps:
- changing a state of the purge valve,
- measuring at least one operating parameter of the internal combustion engine that is connected with a mixture admitted to said engine, and
- calculating an indicator, by statistical signal processing of at least one measured parameter, and of comparing this indicator against a predetermined value,
- wherein said calculating an indicator comprises measuring a level of noise corresponding to at least one operating parameter of the internal combustion engine connected with the mixture admitted to said engine, before and after a change in state of the purge valve.
Dependencies are inferred from the claim text.