Gm Global Technolgoy Operations, Inc.

Thomas Hild

Andreas Koenekamp

Thomas Herbig

Christian Koenig

Bernhard Wnendt

Thomas Wollstadt

Rocco Schoene

A back pressure valve for a fuel cell stack assembly is disclosed, wherein the valve includes a solenoid disposed thereon, an energization of the solenoid causing a generation of heat in a valve flap to facilitate a melting of ice that has formed in the valve.

Back pressure valve with inductively heated flap

An air humidifier is disclosed, the air humidifier including a caseless humidification module, wherein sealing properties of the humidification module are optimized.

Fuel cell air humidifier

A fuel cell stack receiving oxidant into a compressor progressively pressurizing the oxidant from an inlet pressure to a discharge pressure where a fluid connection exists between oxidant effluent from the fuel cell stack and the progressively pressurized oxidant within the compressor at an intermediate pressure between the compressor inlet pressure and the compressor discharge pressure. A pressure regulator is provided for managing pressure of the cell oxidant effluent recycle flow to the compressor, and measurements are taken of compressor power consumption and/or compressor discharge temperature, humidity, and/or pressure to further control the regulator.

Cathode humidification of a PEM fuel cell through exhaust gas recirculation into a positive displacement compressor

Turbocompressorscomprise a turbine, a compressor, a rotatable shaftconnecting the turbineand compressorat opposite ends of the shaft, and an electric motorcoupled to the compressor. The turbinecomprises an inlet portconfigured to receive an air feed, and a turbine wheelconnected to the shaftand configured to rotate in response to a torque (&#x3c4;) provided by the air feed. The rotation of the turbine wheelis rotates the rotatable shaftand a compressor wheelof the compressorconnected thereto. The compressorcomprises an inlet port configured to receive and compress an air feed. The electric motormay deliver a torque (&#x3c4;) to the compressor wheelin a direction opposite the direction of rotation of the rotatable shaftin order to shut down the turbocompressor

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Mainz, Germany

Thomas Hild