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. 25, 2013
Filed:
Oct. 29, 2008
Norimasa Ishikawa, Asahikawa, JP;
Norimasa Ishikawa, Asahikawa, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A fuel cell system having an on-off valve, such as an injector, disposed in a fuel supply flow path restrains a pressure detection error of a fuel gas in the vicinity of the on-off valve to a small level. The fuel cell system includes a fuel cell, a fuel supply flow path for supplying a fuel gas, which is supplied from a fuel supply source, to the fuel cell, an on-off valve which adjusts the condition of a gas on an upstream side of the fuel supply flow path and then supplies the gas to a downstream side, and a control means which controls the drive of the on-off valve at a predetermined drive cycle, wherein the control means sets the upper limit value of a duty ratio at each drive cycle of the on-off valve.