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. 12, 2015
Filed:
Nov. 08, 2011
Mark W. Peters, Wolverine Lake, MI (US);
Robert Roy Jentz, Westland, MI (US);
Darrell Erick Butler, Macomb, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Mark W. Peters, Wolverine Lake, MI (US);
Robert Roy Jentz, Westland, MI (US);
Darrell Erick Butler, Macomb, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for generating sufficient vacuum to enable a leak detection routine. While a fuel tank pressure is within mechanical limits, fuel vapors are purged from a canister to an engine with an isolation valve open to generate a desired level of vacuum in the fuel tank. Thereafter, the fuel tank is isolated and leak detection is performed concurrent to the purging.