CUP 5P2525 - Caterpillar

Operation
A turbocharger uses the exhaust gases in order to drive a turbine wheel which drives a compressor. The compressor increases the pressure and density of the charge in the engine's cylinders. This will increase the power of the engine above a naturally aspirated engine.The turbocharger consists of a single stage axial flow turbine and a centrifugal air compressor that is connected by a single rotor shaft that is supported on inboard bearings.The exhaust gas that is discharged from the engine cylinders enters the inlet housing for the turbine. The exhaust gas is accelerated through a nozzle ring into the turbine blades. The turbine blades then turn the rotor shaft. The gases then pass through the outlet housing for the turbine to an exhaust pipe.The air that is required by the engine is drawn through the inlet housing for the compressor. The air is then compressed by compressor wheel and a diffuser into the outlet housing for the compressor. The air is then forced into the engine's combustion chamber.
Illustration 1 g01192403
(1) Inlet housing for the compressor
(2) Bearing
(3) Bearing
(4) Outlet housing for the turbine
(5) Inlet housing for the turbine
(6) Inlet housing for the compressor
(7) Turbine wheel
(8) Compressor wheel Components
The turbocharger is an assembly of four housings that are bolted together. A single stage axial flow turbine and a centrifugal air compressor is mounted on a single shaft.The turbocharger's lubrication is supplied from the engine.Outlet Housing for the Turbine
The outlet housing for the turbine is cooled by air. The outlet housing for the turbine is attached to