| 摘要 |
A temperature sensor detects the temperature of a coolant circulating in a coolant supply system of a fuel cell. A control unit monitors the temperature detected by the temperature sensor. When the temperature of the coolant is higher than a target temperature, the control section switches a rotary valve to a radiator-side flow path so that a radiator cools the coolant, and when the temperature of the coolant is lower than the target temperature, the control section switches the rotary valve to a bypass-side flow path to raise the temperature of the coolant through FC generation so that the temperature detected by the temperature sensor is equal to the target temperature. During the process above, in a low temperature environment, the target temperature is raised to a temperature that is higher than a target temperature during a normal operation, while a heater heats the coolant. Through the above processing, the temperature inside the fuel cell can be prevented from decreasing excessively even in the low temperature environment.
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