Single sensor misfire detection apparatus and method for an...

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

F - Mech Eng,Light,Heat,Weapons

02

P

F02P 17/00 (2006.01) G01M 15/11 (2006.01)

Patent

CA 2104145

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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