| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas leakage determination device capable of determining gas leakage with high precision, and capable of reducing a gas leak volume in a defective flow passage. <P>SOLUTION: This gas leakage determination device for detecting the gas leakage in a fuel cell system is provided with cut-off valves SV1-SV5 for blocking a gas flow in an inspection objective section of a gas leakage inspecting object, a gas pressure regulating valve RG for changing supply pressure of gas supplied to the inspection objective section, gas pressure detecting sensors P1-P3 for detecting pressure of the gas in the inspection objective section, and a control part 20 for controlling the cut-off valves and the gas pressure regulating valve. The control part 20 is provided with the first gas pressure measuring means for blocking the gas flow in the inspection objective section by the cut-off valves SV1-SV5 to monitor a pressure variation of the gas in the inspection objective section by the gas pressure detecting sensors P1-P3, and the second gas pressure measuring means for elevating the pressure of the gas in the inspection objective section by the gas pressure regulating valve RG to monitor the pressure variation of the gas again by the gas pressure detecting sensors, when the pressure variation of the gas is a prescribed value or less in the first gas measurement. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
