Abstract: A turbocharger system for an engine (e.g., a diesel engine in a locomotive) includes a turbocharger unit and a fixed gear assembly. The turbocharger unit comprises a compressor for providing compressed air to an intake of the engine, a turbine driven by an exhaust of the engine, and a shaft interconnecting the turbine and compressor. The fixed gear assembly interconnects an engine gear train of the engine to the turbocharger unit for driving the turbocharger unit. There is no turbocharger clutch mechanism in the turbocharger system, engine, or otherwise in the vehicle. Thus, the fixed gear assembly operates to drive the turbocharger unit whenever the engine gear train is operational.

Abstract: A clutch assembly permanently fixed between a rotary input member and a rotary output member to produce a driving connection between the members, the clutch assembly comprising a plurality of elements wherein every element of the clutch assembly is permanently fixed together so that the clutch assembly does not rotate.