| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching state determination system of a cutoff valve and a switching state determination method of the cutoff valve, capable of surely and easily determining the switching state of the cutoff valve. <P>SOLUTION: This switching state determining system S1 of a cutoff valve is provided with a fuel gas supply piping 10 for making a hydrogen tank 5 and a fuel cell 6 communicate with each other; the cutoff valve 21 and a decompression valve 100, installed sequentially on the supply piping 10 from the hydrogen tank 5 toward the fuel cell 6; a pressure sensor 41 for detecting pressure of hydrogen gas on the upstream side of the decompression valve 100; and a cutoff valve switching state determining means 70 for determining the switching state of the cutoff valve 21 based on pressure detected by the pressure sensor 41, after valve-closing command is issued to the cutoff valve 21; and is so structured that the determination means 70 continues to determine whether the pressure is lowered, until the maximum delay time elapses from the valve-closing command; it is determined that the cutoff valve 21 is closed, when the pressure is lowered; and it is determined that the cutoff valve 21 is opened, when the pressure is not lowered after the maximum delay time elapses. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
