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:
Oct. 07, 2014
Filed:
Apr. 29, 2011
Applicants:
Oliver Maier, Worms, DE;
Michael Leykauf, Darmstadt, DE;
Inventors:
Oliver Maier, Worms, DE;
Michael Leykauf, Darmstadt, DE;
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 28/00 (2006.01); G06F 19/00 (2011.01); F02M 21/02 (2006.01); B60K 15/03 (2006.01); B60K 15/07 (2006.01); B60K 1/00 (2006.01);
U.S. Cl.
CPC ...
F02M 21/0242 (2013.01); B60K 2015/03026 (2013.01); B60K 15/07 (2013.01); B60K 15/03006 (2013.01); B60K 2001/001 (2013.01); Y02T 10/32 (2013.01); B60K 2015/03315 (2013.01); B60K 2015/03013 (2013.01);
Abstract
Systems and methods to diagnose valve leakage in a vehicle storing gaseous fuel in two or more vessels. A valve regulating the flow of the gaseous fuel from one of the vessels is closed and reopened, while the other vessels are providing gaseous fuel during a full run. The pressure spike from reopening the valve is analyzed to determine the rate of pressure change. Pressure spikes having a rate of change lower than a threshold parameter are indicative of a leaking valve.