Dual sensor misfire detection apparatus and method for an intern

Details Dual sensor misfire detection apparatus and method for an intern Dual sensor misfire detection apparatus and method for an intern

1995-08-03

1996-10-01

Park, Collin W.

Boots, shoes, and leggings

731173, 123419, 123436, G01M 1500

Patent

active

055616003

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 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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