EVAPORATIVE EMISSIONS CANISTER HAVING AN INTEGRAL 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 canister for use in an automotive evaporative emission system to control emission of fuel vapors to the atmosphere. The canister includes an integrally 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 an internal membrane located above the vapor adsorbent chamber in the fresh air side of the adsorbent chamber for preventing the fuel vapor molecules from passing through the internal membrane while allowing the air molecules to pass therethrough. The internal membrane is characterized as a cellular fibular material having physical properties sufficient to effectively cause any fuel vapor component molecules and associated pollutants to be sufficiently filtered or separated on the membrane while allowing fresh air molecules to pass freely therethrough.
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