Vapor canister having integrated evaporative emission purge actuation monitoring system
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Nov 19, 2007
filing date -
Nov 19, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A vapor canister having an integrated evaporative emission canister purge actuation monitoring system. The vapor canister has a housing with an integrated valve body having a main flow passage, 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 a fresh air port. A vacuum actuated switch is supported by the integrated valve body and in electrical communication with a control unit. The switch is responsive to negative pressure in the main flow passage to send a signal indicative of the predetermined negative pressure to the control unit.
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