Method for diagnosing the leakage of an injector and...

Details Method for diagnosing the leakage of an injector and... Method for diagnosing the leakage of an injector and...

2008-05-07

2010-10-05

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Fuel system or part thereof

Reexamination Certificate

active

07805985

ABSTRACT:
In order to diagnose the leakage of an injector (IN1) which serves for injecting fuel into the combustion chamber of at least one cylinder (CY1) of a combustion engine (CE), it is detected, in an observation time window (OPS2) during which the particular injector (IN1) of the combustion engine (CE) that is to be tested is deactivated, whether a deviation (DV) of the speed curve (GS2) of the combustion engine (CE) has occurred relative to a reference speed curve (GS1) which indicates injector leak-tightness. In the event that a deviation (DV) is detected, it is concluded that there is a leakage of the injector (IN1).

REFERENCES:
patent: 5611314 (1997-03-01), Fuwa et al.
patent: 2002/0112528 (2002-08-01), Antonioli et al.
patent: 2005/0005880 (2005-01-01), Bale et al.

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