Misfire-detecting system for an internal combustion engine which detects a misfire due to the fuel supply system
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United States of America Patent
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Jul 5, 1994
Issued Date -
N/A
app pub date -
Jul 19, 1993
filing date -
Mar 7, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A misfire-detecting system for an internal combustion engine detects a value of the sparking voltage generated by the igniting device after generation of the ignition command signal, determines the duration of a discharge of a spark plug, based upon the detected sparking voltage, and determines whether or not a misfire has occurred in the engine, based upon the determined duration of the discharge. For example, the misfire-detecting system measures the duration of the discharge from the time of generation of the ignition command signal, based upon the detected sparking voltage, compares the measured duration of the discharge with a predetermined time period. When the measured duration is shorter than the predetermined time period, it is determined that a misfire has occurred in the engine.
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