| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system which can stably continue power generation even if abnormality of an oxidant gas flow sensor occurs. <P>SOLUTION: A target air-flow rate operation part 23 calculates a target air-flow rate value based on a request quantity of power generation. An air-flow rate sensor normal range operation part 25 calculates a normal range of a detected value of an air-flow rate sensor 7 basing on an operating condition of a fuel cell. An air-flow rate sensor monitoring part 26 monitors whether the detected value of the air-flow rate sensor 7 falls within a normal range or not. An air-flow rate control changing-over part 29 controls an air-flow rate by feedback control when the detected value of the air-flow rate falls within the normal range, and changes over a feedback control part 28 and a feedforward control part 27 so as to control the air-flow rate by feedforward control when the detected value of the air-flow rate deviates from the normal range. <P>COPYRIGHT: (C)2004,JPO |
