Caterpillar Inc.

Frank G Gerke

Mark D Moeckel

James John Callas

Delbert L Kramer

Beth A Hinchee

A turbocharger for an internal combustion engine, is provided with a turbine including a rotatable turbine shaft, a turbine wheel carried by the turbine shaft, and a drive gear carried by the turbine shaft. A first compressor includes a rotatable first compressor shaft, a first compressor wheel carried by the first compressor shaft, and a first driven gear carried by the first compressor shaft. The first driven gear is operatively engaged with and driven by the drive gear. The turbocharger has a compact arrangement, and allows for optimization of compressor wheel operating speeds, including in a turbocharger having multiple compression stages.

Separate shaft turbocharger

A variable geometry nozzle suitable for a radial turbine in a turbocharger for an internal combustion engine. The turbine inlet, turbine outlet or both include a vane assembly having a housing and an adjustable cartridge movable in the housing. Each cartridge has vanes having a plurality of vane sections. Each vane section provides a vane geometry different than the vane geometries of the other vane sections.

Variable geometry nozzle for radial turbines

A turbocharger for an internal combustion engine is provided with a compressor having an inlet receiving combustion gas and an outlet; and a turbine drivingly coupled to the compressor. The turbine has a shaft and a turbine wheel disposed on the shaft. The turbine wheel has a plurality of turbine blades and an edge defining a plurality of scallops. Scallop fillers are disposed between the turbine blades. Advantages of a scalloped turbine wheel, resulting from reductions in mass, are achieved without reductions in efficiency normally experienced with scalloped turbine wheels.

Growing community of inventors

Chillicothe, IL, United States of America

Frank G Gerke