Abnormality determination device of internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America
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May 10, 2022
Grant Date -
Aug 13, 2020
app pub date -
Jan 16, 2020
filing date -
Jan 16, 2020
priority date (Note) -
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Abstract
An abnormality determination device of an internal combustion engine in which a breather line connects an intake-air path positioned upstream from a forced-induction system and a crankcase includes an intake-air flow rate sensor that detects an intake air flow rate in the intake-air path, a pressure sensor that detects a pressure of the breather line, and an abnormality determination unit that determines abnormality of the breather line. The abnormality determination unit estimates an intake air resistance of the intake-air path from the pressure when the engine is under low load conditions under which the intake air flow rate is less than a predetermined value and the pressure when the engine is under high load conditions under which the intake air flow rate is the predetermined value or greater and determines abnormality of the breather line when the intake air resistance is less than a threshold.
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