The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Aug. 26, 1999
Thomas Charles Meiller, Pittsford, NY (US);
Martin A. Martina, Penfield, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Onboard refueling vapor recovery canister for a gasoline-powered vehicle including an unequally-divided carbon bed, a vent solenoid, and a high-capacity, self-cleaning vent filter. Integral configuration of the canister reduces its size and also increases the allowable carbon volume over prior art canisters, permitting use of a lower grade carbon at a significant cost savings while meeting all working capacity requirements. The filter box has an air inlet port and contains a high-efficiency filter wrapped around a feature enclosing a solenoid for opening and closing the air flow through the canister. Wrapping the filter increases the available surface area by more than 50% over that of a flat filter. Outward air flow during refueling partially backflushes the filter, thereby extending the useful life of the filter media. The carbon absorber is divided into two sequential beds of unequal length but equal cross-sectional area, which improves the diurnal efficiency performance of the canister relative to known canisters.