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:
Sep. 24, 2013
Filed:
Mar. 16, 2007
Kenichi Hamada, Hadano, JP;
Kenichi Hamada, Hadano, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A fuel cell system () includes: a circulation pump () provided on a fuel gas circulation channel () so as to circulate a fuel gas; a pump temperature detection portion () that detects a temperature of the circulation pump (); a warmup portion that warms up the circulation pump; a pump control portion () that drives the circulation pump; and a breakdown determination portion () that determines whether the circulation pump has broken. At the start of the fuel cell system, if the pump temperature detected by the pump temperature detection portion () is below the melting point of water, the warmup portion warms the circulation pump, and the pump control portion () drives the circulation pump (). If the pump temperature is higher than or equal to the melting point of water and the rotation speed of the circulation pump () is less than a predetermined speed, the breakdown determination portion () determines that the circulation pump () has broken.