Failure detection device for exhaust recirculation apparatus of engine with supercharger
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United States of America Patent
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Aug 30, 2016
Grant Date -
Jan 8, 2015
app pub date -
Jun 30, 2014
filing date -
Jun 30, 2014
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
In an engine with a supercharger, a low pressure loop EGR apparatus includes a EGR passage to allow part of exhaust gas discharged from a combustion chamber of the engine to an exhaust passage to flow as EGR gas in an intake passage to return to the combustion chamber, and a EGR valve to regulate a flow of EGR gas in the EGR passage. The EGR passage has an inlet connected to the exhaust passage downstream of a turbine and an outlet connected to the intake passage upstream of a compressor. An ECU controls the EGR valve while the engine is in a predetermined operating condition, and determines whether or not the EGR valve is failed based on changes in intake amount in the intake passage during control of the EGR valve.
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