Fuzzy logic method for detecting misfiers in internal combustion

Details Fuzzy logic method for detecting misfiers in internal combustion Fuzzy logic method for detecting misfiers in internal combustion

1994-12-05

1996-09-24

Chilcot, Richard

Measuring and testing

Vehicle chassis

Steering

123419, G01M 1500

Patent

active

055592856

ABSTRACT:
Misfiring of individual cylinders in an internal combustion engine 70 is detected based on simultaneous use of two or more different methods of misfire detection which examine different combustion-related parameters of engine operation, such as crankshaft acceleration and exhaust gas pressure. An analyzer 76 produces a final misfire determination M.sub.f (i) based on the simultaneously obtained misfire determinations in order to provide greater coverage of the speed-load range of engine 70 and to provide increased confidence and accuracy in calling misfires in the portion of the speed-load range where both misfire methods are presumed to function.

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