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Title:
FUEL CELL SYSTEM AND ITS OPERATION STOP METHOD
Document Type and Number:
WIPO Patent Application WO/2007/077904
Kind Code:
A1
Abstract:
A fuel cell system (1) includes a fuel cell (10), a hydrogen gas supply pipe system (3) for supplying a fuel gas to the fuel cell (10), and an injector (35) for adjusting the pressure of the upstream side of the hydrogen gas pipe system (3) so as to supply the hydrogen gas to the downstream side. The fuel cell system (1) further includes an internal channel communicating the upstream side and the downstream side of the injector (35) and a valve body (65) movably arranged in the internal channel for switching the channel opening area in a plurality of stages according to the movement position. Upon system stop, at least the water around the valve body (65) of the injector (35) is reduced. With this configuration, the water around the valve body as a movable portion in the injector is reduced upon system stop accordingly, even when the fuel cell system is exposed to a low temperature environment, it is possible to suppress fixation of the valve body due to freezing of water in the injector.

Inventors:
KATANO KOJI (JP)
YAMAGISHI NORIO (JP)
HOTTA AKIHISA (JP)
Application Number:
PCT/JP2006/326166
Publication Date:
July 12, 2007
Filing Date:
December 21, 2006
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
KATANO KOJI (JP)
YAMAGISHI NORIO (JP)
HOTTA AKIHISA (JP)
International Classes:
H01M8/04; F02M21/02; F02M51/06; F02M53/06; F16K31/06
Foreign References:
JPH06275300A1994-09-30
JP2005327596A2005-11-24
JP2005011779A2005-01-13
JPH051641A1993-01-08
JP2006127830A2006-05-18
JP2005276764A2005-10-06
JP2005337404A2005-12-08
JPH0539883A1993-02-19
JP2003203665A2003-07-18
JPH08144859A1996-06-04
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (23rd Floor Roppongi Hills Mori Tower, 6-10-1 Roppongi, Minato-k, Tokyo 23, JP)
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