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:
Mar. 10, 2015
Filed:
Feb. 22, 2011
Aed Mohammad Dudar, Canton, MI (US);
Robert Roy Jentz, Westland, MI (US);
Timothy Debastos, Royal Oak, MI (US);
James Michael Kerns, Trenton, MI (US);
Michael Igor Kluzner, Oak Park, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Robert Roy Jentz, Westland, MI (US);
Timothy DeBastos, Royal Oak, MI (US);
James Michael Kerns, Trenton, MI (US);
Michael Igor Kluzner, Oak Park, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for monitoring a fuel vapor recovery system including a fuel tank isolation valve coupled between a fuel tank and a canister. During selected conditions, the valve is modulated and pressure pulsations in the fuel vapor recovery system are monitored. Valve degradation is identified based on correlations between the valve modulation and the resultant pressure pulsations.