| 摘要 |
PURPOSE:To achieve a stable and highly accurate measurement without electric contact with an electrolytic liquid from outside, by detecting a partial vapor pressure of a liquid fuel in the gaseous phase of the electrolytic liquid mixed with the liquid fuel with a semiconductor gas sensor. CONSTITUTION:A fuel pole chamber 11 and an air pole chamber 12 are arranged on both sides of a laminated fuel battery 10 and an electrolytic liquid 18 in an electrolytic liquid reservoir 17 is mixed with a liquid fuel 16 from a tank 15 to be supplied and circulated with a pump 14 to the fuel pole chamber 11 through an electrolytic liquid reservoir 17 and supply paths 11A and 11B. Air for an oxidizing agent is supplied to the air pole chamber 12 with a fan 13 through supply paths 12A and 12B. Moreover, a semiconductor gas sensor 26 is arranged in the gaseous phase of the liquid reservoir 17 and the partial vapor pressure of fuel in the gaseous phase, hence changes in the resistance of the gas sensor 26 due to the gas density thereof, is detected with an ammeter 21 to measure the density of the liquid fuel in the electrolytic liquid 18. Then, a temperature correction of a sensor 20 at a correcting section 20 is done with a temperature detection thermistor 25 while the supply of the liquid fuel 16 from the fuel tank 15 is controlled by adjusting the opening/closing frequency of a solenoid valve 19. |
