Fuel supply misfire-detecting system for internal combustion engines
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United States of America Patent
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Sep 20, 1994
Grant Date -
N/A
app pub date -
Dec 11, 1992
filing date -
Dec 13, 1991
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. A differentiating circuit differentiates the detected value of the sparking voltage. A misfire-determining circuit compares the differential value of the sparking voltage with a predetermined value, and determines, based upon a result of the comparison, whether a misfire has occurred in the engine.
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