Discharge state detecting apparatus of internal combustion engine
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United States of America Patent
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Dec 8, 2020
Grant Date -
Oct 8, 2020
app pub date -
Jan 27, 2020
filing date -
Apr 2, 2019
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Abstract
Even when detecting the primary voltage of the primary coil side, without detecting the secondary voltage of the secondary coil side of high voltage, it is desired to provide a discharge state detecting apparatus of an internal combustion engine which can detect a spark discharge state with good accuracy, by reducing influences of the discharge current and the resistance component of the discharge path of the secondary coil side, which are generated in the primary voltage. A discharge state detecting apparatus of an internal combustion engine performs correction which reduces a signal component generated by the secondary current in the ignition coil from the primary voltage detected by the primary voltage detector, based on the detected secondary current, and outputs a primary voltage after correction; and determines a spark discharge state based on the primary voltage after correction.
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