| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a decreasing volume of a fuel cell output in a fuel cell system due to inability to exhaust hydrogen gas after reaction at start-up in a simple structure. <P>SOLUTION: At a start-up process, as shown in a step S104, the control part 61 judges that a hydrogen system exhaust valve is in a frozen state with a switching operation impossible, in case a temperature of the hydrogen system exhaust valve is not above the defrosting temperature, and, as shown in a step S120, the number of rotation of a hydrogen circulation pump is increased to increase a circulation flow of a hydrogen side electrode more than a normal circulation flow for start-up. Then, if the temperature of the hydrogen system exhaust valve gets above the defrosting temperature, the number of rotation of hydrogen circulation pump is returned back to a normal circulation flow control as shown in a step S105 to start up. <P>COPYRIGHT: (C)2008,JPO&INPIT |
