Patent ID: 8241808

Claim:
A fuel cell system comprising: an ejector that is disposed in a gas supply system, combines a new gas to be supplied to a fuel cell with a gas discharged from said fuel cell, and supplies said fuel cell with a resulting combined gas, wherein said ejector comprises: a nozzle for ejecting said new gas and generating a negative pressure for aspirating said gas discharged from said fuel cell; and a flow rate control mechanism for controlling a flow rate of said new gas which passes through said nozzle, wherein said gas supply system includes a first flow path for leading said gas, which is discharged from said fuel cell and flows between said fuel cell and said ejector, to a base end side of said flow rate control mechanism, said flow rate control mechanism controls said flow rate of said new gas in accordance with a pressure of the gas led from said first flow path, and said first flow path is connected to a circulation passage which is disposed between said fuel cell and said ejector, and the first flow path branches directly from the circulation passage which leads said discharged gas to a tip end side of said flow rate control mechanism, opposite said base end side.