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. 07, 2013
Filed:
Apr. 29, 2011
James Michael Kerns, Trenton, MI (US);
Chris Kragh, Commerce Township, MI (US);
Dennis Yang, Canton, MI (US);
Timothy Debastos, Royal Oak, MI (US);
Russell Randall Pearce, Ann Arbor, MI (US);
Scott Bohr, Plymouth, MI (US);
Michael G. Heim, Brownstown, MI (US);
James Michael Kerns, Trenton, MI (US);
Chris Kragh, Commerce Township, MI (US);
Dennis Yang, Canton, MI (US);
Timothy DeBastos, Royal Oak, MI (US);
Russell Randall Pearce, Ann Arbor, MI (US);
Scott Bohr, Plymouth, MI (US);
Michael G. Heim, Brownstown, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for operating a fuel vapor recovery system having a fuel tank isolation valve coupled between a fuel tank and a canister. Fuel vapors are purged from the fuel tank to a canister buffer over a plurality of purge pulses. The pulses are adjusted based on the buffer capacity, a purge flow rate, and a fuel tank pressure to improve control of canister loading and reduce air-to-fuel ratio disturbances.