Abnormality diagnosis system for internal combustion engine and abnormality diagnosis method for internal combustion engine
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United States of America Patent
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Oct 22, 2019
Grant Date -
Oct 4, 2018
app pub date -
Mar 23, 2018
filing date -
Apr 4, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
An abnormality diagnosis system of an internal combustion engine that is installed on a vehicle and includes an actuator includes an electronic control unit. The electronic control unit receives vehicle outside information concerning a period of time for which the vehicle speed is less than a predetermined value, and determines whether the period for which the vehicle speed is less than the predetermined value is expected to be equal to or longer than a length of time required for an abnormality diagnosis of an abnormality diagnosis target device. The electronic control unit activates the actuator and starts the abnormality diagnosis as the vehicle speed becomes lower than the predetermined value, when it determines that the period for which the vehicle speed is lower than the predetermined value is expected to be equal to or longer than the time required for the abnormality diagnosis of the target device.
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