Precision purge valve system with pressure assistance
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United States of America Patent
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Jul 12, 2016
Grant Date -
Sep 4, 2014
app pub date -
Feb 28, 2014
filing date -
Mar 1, 2013
priority date (Note) -
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Abstract
A pressure-assisted precision purge valve system is provided in an evaporative emission control system that provides flow of fuel vapor-air mixture from a fuel tank to an intake manifold. The pressure-assisted precision purge valve system comprises an absorbent canister through which the fuel vapor-air mixture flows, a purge valve configured to regulate flow of the fuel vapor-air mixture to the intake manifold and a fuel vapor pump configured to provide a forced flow to the purge valve dependent on a system differential pressure. The output of the purge valve can be connected to an upstream injection point and/or a downstream injection point of a forced induction device.
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