Abnormality sensing device for evaporation fuel purge system
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United States of America Patent
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May 21, 2019
Grant Date -
Jan 21, 2016
app pub date -
Jul 7, 2015
filing date -
Jul 15, 2014
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Abstract
An abnormality sensing device for an evaporation fuel purge system is equipped with a purge passage that connects a canister to an intake passage of an internal combustion engine, a purge pump, a purge control valve, and a valve component that closes and opens the purge passage at a target passage including at least a first purge passage defined between the purge control valve and the intake passage. An abnormality determining portion detects a physical quantity relevant to a pressure change in the target passage in a determination possible state where the purge control valve allows the evaporation fuel to flow through the first purge passage and where the valve component prohibits the evaporation fuel from being supplied to the intake passage.
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