FUEL CELL SYSTEM

PROBLEM TO BE SOLVED: To provide a fuel cell system capable of minimizing unnecessary power generation in a fuel cell during deceleration.SOLUTION: A fuel cell system 101 uses, as an inlet sealing valve 174, an eccentric valve having a rubber sheet 21 provided with a seal part 21a having such a shap...

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Bibliographische Detailangaben
Hauptverfasser: ITO SHIGETO, YOSHIOKA MAMORU, FUJIMURA TOSHIYUKI, SUGIURA HIROSHI, FUKUI MAKOTO, MISHIMA YOSHIZUMI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a fuel cell system capable of minimizing unnecessary power generation in a fuel cell during deceleration.SOLUTION: A fuel cell system 101 uses, as an inlet sealing valve 174, an eccentric valve having a rubber sheet 21 provided with a seal part 21a having such a shape as to increase the surface pressure of a portion in contact with a seal surface 18 of a valve body 14 when pressure in an air supply passage 161 rises. An eccentric valve basically identical in structure to the inlet sealing valve 174 is used as each of an outlet integration valve 181 and a bypass valve 191. When supply of air to a fuel cell stack 111 is to be stopped during deceleration of a vehicle, a controller 201 closes the inlet sealing valve 174 and opens the bypass valve 191 and, after the inlet sealing valve 174 is fully closed, closes the bypass valve 191.SELECTED DRAWING: Figure 22 【課題】減速時における燃料電池での不要な発電を最小限に抑えることができる燃料電池システムを提供すること。【解決手段】燃料電池システム101において、入口封止弁174として、エア供給通路161の圧力が上昇した場合に、弁体14のシール面18に接触する面圧が高められる形状のシール部21aを備えるゴムシート21を有する偏心弁を使用する。また、出口統合弁181及びバイパス弁191として、入口封止弁174と基本的に同一構成の偏心弁を使用する。そして、コントローラ201は、車両の減速時に燃料電池スタック111へのエアの供給を停止する場合、入口封止弁174を閉弁させるとともにバイパス弁191を開弁させ、入口封止弁174が全閉になった後にバイパス弁191を閉弁させる。【選択図】図22