EVAPORATIVE EMISSIONS CANISTER WITH EXTERNAL MEMBRANE
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United States of America Patent
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N/A
Issued Date -
Dec 18, 2008
app pub date -
Jun 13, 2007
filing date -
Jun 13, 2007
priority date (Note) -
Abandoned
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Abstract
An evaporative emissions system is used in an automotive evaporative emission system including a fuel tank coupled to an automotive engine to control emission of fuel vapors to the atmosphere. The system includes (1) an evaporative emissions canister comprising a unitary molded housing having a circumferential side member, a top member and a bottom member; a hydrocarbon-adsorbing material disposed therein so as to provide a vapor adsorbent chamber for adsorbing hydrocarbon fuel vapor flowing therethrough; and (2) a second housing containing a membrane, the second housing located adjacent the fresh air line of the evaporative emissions canister for preventing fuel vapor molecules and pollutants associated therewith, from passing through the membrane while allowing the air molecules to pass therethrough. A method is provided for preventing or substantially reducing hydrocarbon emissions to the atmosphere.
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