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. 14, 2013
Filed:
Oct. 06, 2009
Mark Peters, Wolverine Lake, MI (US);
Eric A. Macke, Ann Arbor, MI (US);
Christopher Kragh, Commerce Township, MI (US);
Robert Roy Jentz, Westland, MI (US);
Mark Peters, Wolverine Lake, MI (US);
Eric A. Macke, Ann Arbor, MI (US);
Christopher Kragh, Commerce Township, MI (US);
Robert Roy Jentz, Westland, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for operating a fuel vapor control system included in a vehicle having an internal combustion engine is provided. The method may include storing positive pressure or negative pressure in an isolated fuel tank, transferring at least a portion of the positive pressure or the negative pressure to an evaporation canister region, and determining degradation of the evaporation canister based on a pressure response of the evaporation canister region while the evaporation canister region is isolated from the fuel tank. In this way, it is possible to utilize pressure that may be passively generated in one portion of the system, even during shut-down engine operation, to verify the integrity of another portion of the system.