Misfire detection in an internal combustion engine using exhaust

Details Misfire detection in an internal combustion engine using exhaust Misfire detection in an internal combustion engine using exhaust

1992-06-03

1993-03-16

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123676, 123481, 731173, 36442403, F02M 2507, G01M 1500

Patent

active

051935139

ABSTRACT:
Misfiring of individual cylinders in an internal combustion engine is detected based on sensing exhaust pressure during each operating cycle of the engine. A pressure signal is sampled and digitized during each cycle to form an input vector for a pattern classifier. Predetermined internal coefficients of the trained classifier enable the classifier to discriminate between firing and misfiring cylinders in real time with a high degree of accuracy. Overall system cost is reduced by sharing a pressure transducer with an exhaust gas recirculation system on the internal combustion engine.

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