Misfire detecting apparatus for internal combustion engine and method thereof
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United States of America Patent
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Oct 10, 2006
Grant Date -
Dec 2, 2004
app pub date -
Apr 23, 2004
filing date -
Apr 24, 2003
priority date (Note) -
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Abstract
Whether a misfire occurred is judged based on a comparison between diagnosis data that indicates a variation of an engine rotation speed and a threshold based on engine operating conditions. The misfire judgment is canceled based on a result of a comparison between data indicating an average correlation between the diagnosis data and the threshold, and a threshold for cancellation judgment.
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