| 摘要 |
PROBLEM TO BE SOLVED: To inhibit a rise in the pressure of fuel gas while minimizing the release of the fuel gas into the atmosphere, the fuel gas being located further upstream that an adjustment valve provided upstream from a fuel cell.SOLUTION: The hydrogen gas pressure further downstream than a hydrogen cylinder 2 is reduced by a high pressure regulator 7. Injectors 14 to 17, which adjust the flow rate of hydrogen gas supplied to a fuel cell 1, are provided further downstream than the high pressure regulator 7. The injectors 14 to 17 are set at valve opening pressure by hydrogen gas pressure acting on the upstream side thereof, the valve opening pressure enabling the injectors 14 to 17 to be opened. The injectors 14 to 17 are closed when the supply of hydrogen gas to the fuel cell 1 is stopped. Hydrogen gas pressure (secondary voltage) between the high pressure regulator 7 and the injectors 14 to 17 are detected by a secondary pressure sensor 32. If the difference between the secondary pressure and the valve opening pressure is equal to or smaller than a predetermined value during the stop of the supply of hydrogen gas to the fuel cell 1, a controller 40 opens the valves of the injectors 14 to 17 in order to reduce the secondary pressure. |
