The Turbocharger Is essentially an exhaust driven
centrifugal air compressor. Its purpose Is to Increase
diesel engine power output by supplying compressed
inlet air to the engine.
The Turbocharger consists of the following main parts:
(See Fig. 2).
Turbine Wheel (2)
Compressor Wheel (4)
The Turbine Wheel is located at one end of the Bearing
Housing; the Compressor Wheel is at the other end. A
shaft (5) connects the
Turbine Wheel with the Compressor Wheel, making It a
wheel assembly. The Bearing Housing is oil cooled.
Engine oil is circulated through the Bearing Housing
which acts as a heat barrier between the hot Turbine and
the compressor. Bearings are of the sleeve type and are
lubricated by engine oil. Oil is taken directly from the
clean oil side of the engine oil filters. Piston ring type
seals are used at each end of the shaft.
Turbine Housing (e) and Compressor Housing (7) are
located at opposite ends of the core assembly.
Figure 2. - Turbocharger Core Assembly
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