| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive detecting device for detecting the leakage of fuel gas from a fuel gas circulating supply system during operating a vehicular fuel cell system. <P>SOLUTION: When a value for an output current i in a fuel cell is smaller than a threshold during regenerating decelerating energy (S1), the output current i is shut off by an output current circuit breaker to stop the generation of a fuel cell (S4) and, in turn, a purge valve for discharging water together with the fuel gas from a circulation system and a pressure reducing control valve for controlling the supply of the fuel gas from a fuel supply source are forcibly closed (S2, S3). At this point pressure in a closed space of the fuel gas circulating supply system is detected by a pressure gage, and when the detection result of the pressure gage shows pressure drop at a reference speed or faster, the leakage of the fuel gas is determined (S5-S7). <P>COPYRIGHT: (C)2004,JPO |
