Misfire detection method and apparatus therefor

Details Misfire detection method and apparatus therefor Misfire detection method and apparatus therefor

1992-10-05

1996-04-02

Raevis, Robert

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

055030076

ABSTRACT:
A method for detecting a misfire condition by interpreting acceleration of an engine crankshaft (301) is described. The method teaches measurement of a first engine crankshaft acceleration, (405) proximate a first predetermined engine crankshaft angle, and provides a first reading (407) indicative of the first engine crankshaft acceleration, measurement of a second engine crankshaft acceleration, (417) proximate a second predetermined engine crankshaft angle, and provides a second reading (419) indicative of the second engine crankshaft acceleration, then combines (421) the first reading and the second reading and provides an acceleration coefficient (423) indicative of the combined readings. Then, a misfire is indicated (427) when the acceleration coefficient does not exceed a predetermined limit.

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