| 摘要 |
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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