Evaporated fuel treatment apparatus
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United States of America Patent
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Aug 31, 2021
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N/A
app pub date -
Oct 13, 2020
filing date -
Oct 18, 2019
priority date (Note) -
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Abstract
In an evaporated fuel treatment apparatus, a controller performs first purge concentration determination control by gradually increasing a purge flow rate in increments of a predetermined amount and detect a purge concentration based on a detection value of the pressure sensor. As the first purge concentration determination control, the controller performs a control to prohibit changing of an operating state of the purge pump or changing of an open state of the purge valve until a detected concentration determination time at which a variation range of the purge concentration detected based on a detection value of a pressure sensor becomes equal to or less than a predetermined value.
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