US Patent 7712311 Turbocharger assembly with catalyst coating

A turbocharger assembly is provided. The turbocharger assembly includes a turbine assembly having at least one internal aerodynamic surface and a compressor assembly having at least one internal aerodynamic surface. At least one of the at least one internal aerodynamic surface of the turbine assembly and the at least one internal aerodynamic surface of the compressor assembly is at least partially coated with a catalyst material. The internal aerodynamic surfaces of the turbine assembly may include a volute, variable geometry mechanism, turbine wheel, and outlet. The internal aerodynamic surfaces of the compressor assembly may include and inlet, compressor impeller, diffuser, variable geometry mechanism, and a volute. An internal combustion engine incorporating the disclosed turbocharger assembly is also provided.