Vapor canister having integrated evaporative emission purge actuation monitoring system having fresh air filter
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United States of America Patent
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Jul 21, 2009
Grant Date -
May 21, 2009
app pub date -
Nov 19, 2007
filing date -
Nov 19, 2007
priority date (Note) -
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Abstract
A vapor canister having an integrated evaporative emission canister purge actuation monitoring system. The vapor canister has a plurality of sidewalls defining a housing with a valve body formed integrally on the housing and a cover mounted to the valve body so as to define a vent chamber between the cover and the valve body. The integrated valve body has a main flow passage and a canister port. An air filter assembly is disposed adjacent to the valve body on the housing and provides fluid communication between the main flow passage and the ambient air. A first one-way umbrella valve mounted to the valve body that is responsive to predetermined positive pressure in the main flow passage to control flow of fluid from a vapor canister to ambient air as well as a second one-way umbrella valve that is responsive to a predetermined negative pressure in the main flow passage to control the flow of ambient air through an air filter assembly.
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