Anode circuit of fuel cell system mounted in vehicle, has recirculation conveying device for anode gas exhaust, which is provided in form of gas jet pump by which fuel flowing to fuel cell is driven as propellant gas stream

The anode circuit has a recirculation conveying device (16) for anode gas exhaust, which is drivable by an air driven power turbine (17). The recirculation conveying device is provided in the form of a gas jet pump (11) by which the fuel flowing to the fuel cell (3) is driven as a propellant gas stream. The recirculation conveying device is connected with the power turbine through a clutch (19). The clutch comprises magnetic coupling and freewheel. The power turbine is driven by the cathode-side airflow to and/or from the fuel cell. An independent claim is included for method for operating fuel cell system. Die Erfindung betrifft ein Anodenkreislauf für ein Brennstoffzellensystem (1) mit einer ersten Rezirkulationsfördereinrichtung (16) für Anodenabgas, welche mittels einer luftbetriebenen Antriebsturbine (17) antreibbar ist. Die Erfindung ist dadurch gekennzeichnet, dass eine weitere Rezirkulationsfördereinrichtung in Form wenigstens einer Gasstrahlpumpe (11) vorgesehen ist, welche von einem zur Brennstoffzelle (3) strömenden Brennstoff als Treibgasstrom angetrieben ist.