Patent Document ID: 20090253008
Application ID: 12280368
Patent Flag: 0

Claim One:
1. A fuel cell system comprising: a fuel cell; a supply channel for supplying, to the fuel cell, a fuel gas supplied from a fuel supply source; a variable gas supply device for adjusting a gas state on an upstream side of the supply channel to supply the gas to a downstream side; a control section for performing PI control of a gas supply command amount with respect to the variable gas supply device; and an abnormality judgment section for judging whether or not the variable gas supply device is abnormal, wherein the control section uses, as a part of a correction term of the PI control, a learning term constituted by integrating an I term only in a case where an operation state of the fuel cell satisfies predetermined learning allowable conditions, and the abnormality judgment section judges based on the learning term whether or not the variable gas supply device is abnormal.