Single sensor misfire detection apparatus and method for an inte

Details Single sensor misfire detection apparatus and method for an inte Single sensor misfire detection apparatus and method for an inte

1992-08-21

1994-11-08

Noland, Tom

Measuring and testing

Vehicle chassis

Steering

123419, 36443107, G01M 1500, F02M 5100, F02P 5145

Patent

active

053616294

ABSTRACT:
A misfire detection apparatus and method is provided for detecting misfire in cylinders of an internal combustion engine in a motor vehicle. The method includes sensing rotation of a crankshaft and calculating a crankshaft velocity based on the sensed rotation of the crankshaft. The method also includes compensating the calculated crankshaft velocity based on a predetermined cylinder. The method further includes comparing either the calculated or compensated crankshaft velocity to a predetermined crankshaft velocity range to determine if therein, and counting a misfire if either the calculated or compensated crankshaft velocity is within the predetermined crankshaft range.

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