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

Details Dual sensor misfire detection apparatus and method for an... Dual 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 2104144

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 repeating the sensing and calculating steps a predetermined number of times to develop a measured crankshaft velocity profile. The method further includes obtaining a stored misfire velocity profile based on speed of the crankshaft, comparing the measured crankshaft velocity profile to the stored misfire crankshaft velocity profile to determine if a match exists, and counting a misfire if a match exits.

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