Abnormality determination apparatus for internal combustion engine
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United States of America Patent
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Jun 1, 2021
Grant Date -
Aug 13, 2020
app pub date -
Jan 16, 2020
filing date -
Feb 8, 2019
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Abstract
An abnormality determination apparatus for an internal combustion engine in which an intake passage upstream of a supercharger and a crankcase are connected by a breather line includes: an intake flow rate detection unit that detects an intake flow rate in the intake passage; and an abnormality determination unit that determines abnormality of the breather line. The abnormality determination unit accumulates a time for which a rotation second-order component of a fluctuation waveform of the intake flow rate is equal to or more than a threshold over a predetermined period of time and determines the abnormality of the breather line when the accumulated value is less than a predetermined accumulation threshold.
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