Volkswagen Ag

Audi Ag

Alexander Weß

Hendrik Schröder

Marc Düvel

Frank Juergen Engler

Kay Koppenhagen

The disclosure relates to a fuel cell system comprising a fuel cell stack for providing an electrical power Pdepending on a power demand, at least one auxiliary unit for operating the fuel cell stack with an electrical power consumption P, at least one consumer with an electrical power request P, and a control unit for regulating the power demand as well as a method for controlling such a fuel cell system. It is provided that the control unit is configured to selectively operate the fuel cell system in a first operating mode or in a second operating mode, whereby the fuel cell stack is turned off depending on the operating mode upon the falling below of an optimal efficiency degree operating point P(&#x3b7;) of the fuel cell system or a minimum operating point Pof the fuel cell stack. In particular, at least one auxiliary unit is also turned off in the first operating mode, when the optimal efficiency degree operating point decreases.

Fuel cell system and method for operating a fuel cell system

A method for operating an output apparatus of a motor vehicle performed by the output apparatus and including receiving a first consumption signal that indicates a consumption relating to a first form of energy measured in a first unit of measurement, receiving a second consumption signal that indicates a consumption relating to a second form of energy measured in a second unit of measurement, providing at least one reference element that indicates a respective predetermined standard consumption, displaying the at least one reference element on a display unit, and controlling a position of a consumption display element on the display unit based on the two consumption signals and, as a result, adjusting a relative position of the consumption display element with regard to the at least one reference element.

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Wolfsburg, Germany

Alexander Weß