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:
Jun. 27, 2006
Filed:
Dec. 10, 2002
Peter Willimowski, Darmstadt, DE;
Mirko Schwan, Mittenaar, DE;
Peter Willimowski, Darmstadt, DE;
Mirko Schwan, Mittenaar, DE;
General Motors Corporation, Detroit, MI (US);
Abstract
A delivery system for the delivery of a gaseous fuel such as for example hydrogen, to a consumer, in particular to a fuel cell stack, wherein the fuel comes from a source with a higher pressure level, the delivery system comprising at least one mechanical pressure regulating valve which has a valve member biased by means of a spring and which is designed to regulate the fuel from the higher pressure level down to a lower pressure level which serves as the feed pressure for a control valve, wherein the control valve is connectable via a feed line to a consumer and determines the mass flow of the fuel coming from the source which is supplied to the consumer and wherein changes of the pressure prevailing at the consumer side of the control valve arise with power changes of the consumer, is characterized in that the said pressure prevailing at the consumer side of the control valve, or a value proportional to the latter or corresponding to it, can be supplied via a control line to the mechanical pressure regulating valve to supplement the spring bias acting on the valve member of the mechanical pressure regulating valve. In addition, a fuel cell system and a method for delivering a gaseous fuel are claimed.