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:
Jul. 22, 2014
Filed:
Nov. 03, 2011
Steven R. Falta, Honeoye Falls, NY (US);
Rainer Pechtold, Hunstetten, DE;
Daniel C. Di Fiore, Scottsburg, NY (US);
Donald H. Keskula, Fairport, NY (US);
Matthew A. Lang, Churchville, NY (US);
Michael Leykauf, Darmstadt, DE;
Joseph N. Lovria, Honeoye Falls, NY (US);
Oliver Maier, Worms, DE;
Steven R. Falta, Honeoye Falls, NY (US);
Rainer Pechtold, Hunstetten, DE;
Daniel C. Di Fiore, Scottsburg, NY (US);
Donald H. Keskula, Fairport, NY (US);
Matthew A. Lang, Churchville, NY (US);
Michael Leykauf, Darmstadt, DE;
Joseph N. Lovria, Honeoye Falls, NY (US);
Oliver Maier, Worms, DE;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system and method for controlling hydrogen gas flow to an anode side of a fuel cell stack using a pressure regulator in the event that an injector that normally injects the hydrogen gas into the fuel cell stack has failed in a stuck open position. During normal operation, the control of the injector is determined based on the pressure of an anode sub-system and the position of the pressure regulator is determined based on a supply pressure between the pressure regulator and the injector. If it is determined that the injector is stuck in an open position, then the position of the pressure regulator is controlled to the anode pressure instead of the supply pressure. If the pressure regulator is an electrical pressure regulator, then it is pulsed to mimic normal system operation. Alternately, another valve, such as a shut-off valve, can be employed to provide the flow pulsing.