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:
Dec. 25, 2012
Filed:
Jan. 24, 2012
Douglas Raymond Martin, Canton, MI (US);
Ann Irene Sipes, Milan, MI (US);
Robert Roy Jentz, Westland, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Mark W. Peters, Wolverine Lake, MI (US);
Guopeng HU, Northville, MI (US);
Douglas Raymond Martin, Canton, MI (US);
Ann Irene Sipes, Milan, MI (US);
Robert Roy Jentz, Westland, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Mark W. Peters, Wolverine Lake, MI (US);
Guopeng Hu, Northville, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for testing a vapor purge system (VPS), and the vehicle having the VPS, including a controller for measuring a VPS pressure, closing a first valve coupling a VPS carbon canister and the environment, decreasing VPS pressure if it is greater than a threshold, and monitoring VPS pressure for a time period when the engine is at rest and the vehicle is operating. The pressure is decreased by opening a second valve coupling the fuel tank and the engine while the engine is running, and closing the second valve when the pressure is below the threshold. Another method for testing a VPS includes closing a first valve, closing a second valve, measuring the VPS pressure to provide a reference pressure with an associated profile, and monitoring VPS pressure compared to the profile for a time period.