| 摘要 |
PURPOSE: To prevent lack of oxygen supply in a fuel cell by determining oxygen quantity included in mixed gas and oxygen quantity included in discharge gas, and restraining supply quantity of oxygen-including gas based on a determined oxygen utilization factor. CONSTITUTION: Gas including oxygen is supplied through a cathode entrance 18 to a cathode part 6 to be dicharged from a cathode exit 20, and a sensor 22 to detect oxygen quantity in discharged gas is provided at the exit 20. An air flow sensor 33 is provided close to the entrance 18, and total of quantity of discharge gas 24 discharged from the cathode part 6 to be circulated and introduced air quantity is detected. To a restraining device 34, signals from sensors 22, 33 are inputted, and a signal 40 to detect a current load generated by a stack 7 is inputted. The device 34 performs specified operating action based on above inputted data to control a flow control valve 32, thereby oxygen supply quantity to the cathode part 6 can be controlled at favorable precision. |
