Caterpillar Inc.

Delbert L Kramer

James John Callas

Jim K Carroll

Mark D Moeckel

Frank G Gerke

Wade James Robel

Kerry Allen Delvecchio

Richard W Kruiswyk

Hafiz Anees

An exhaust system for use with an engine is disclosed. The exhaust system may have a first treatment device configured to receive a flow of exhaust from the engine and convert a first constituent of the exhaust to a second constituent. The exhaust system may also have a second treatment device located downstream of the first treatment device and configured to reduce the first constituent and the second constituent. The exhaust system may further have a flow regulator configured to selectively vary a rate of exhaust passing through the first treatment device, and a controller configured to operate the flow regulator such that a desired amount of the first constituent and the second constituent is received by the second treatment device.

Exhaust system implementing selective catalyst flow control

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 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.

Turbocharger including a disk to reduce scalloping inefficiencies

A fan assembly with an improved seal for a mobile machine cooling system is disclosed. A housing is mounted to a machine structure and an impeller is mounted for rotation with respect to the housing. The impeller includes a plurality of rotating blades supported on a flange. A fan inlet is mounted with the housing and directs air toward the blades. A rotating shroud extends outwardly from the impeller flange and has a shroud inlet that extends into the fan inlet to form a seal between the fan inlet and the shroud inlet. The method and apparatus includes forming the seal between the fan inlet and the rotating shroud to prevent leakage as the rotating blades generate a centrifugal airflow for discharge through a fan outlet.

Sealing system for a centrifugal fan

A quiet compact radiator cooling fan having a hub portion, which extends radially outwardly and axially from its inlet to its outlet end, a shroud portion, which extends radially inwardly and axially adjacent the inlet end and radially outwardly and axially adjacent its outlet end forming a converging annular opening and a plurality of airfoil shaped, forward sweep blades disposed between the hub and shroud which cooperate with the hub and shroud to produce a mixed flow radiator fan which has improved blade loading and aeroacoustic performance producing a quiet and efficient cooling fan for off the road vehicles.

Growing community of inventors

Metamora, IL, United States of America

Delbert L Kramer