Teledyne TSIO-360-RB, Maintenance Manual

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11-4
11-2 TURBOCHARGER DETAILED DESCRIPTION.
The turbocharger consists of a radial inward flow turbine and turbine housing, a centrifugal
flow impeller (compressor) and compressor housing, each bolted to a center housing.
The center housing incorporates bearings that support the turbine/compressor shaft. The
shaft and bearings are lubricated with pressurized engine oil that enters the center housing
through an oil inlet check valve and fitting. Drilled passages direct the pressurized oil to the
bearings. After passing through the bearings the oil is evacuated from the center housing oil
outlet and check valve by an engine driven scavenge pump. Oil seals installed outboard of
the turbine/compressor shaft bearings retain the oil in the center housing. The inlet and
outlet check valves prevent oil from flooding the center housing when the engine is not
operating.
During engine operation, exhaust gases from the engine pass through the turbine housing
and cause the turbine wheel to rotate. Since the turbine wheel and compressor are
attached to a common shaft, the compressor rotates with in the compressor housing. The
compressor impeller draws in ambient air, through the aircraft induction system, compresses
the air and delivers it to the engine intake manifold.
As engine power is increased the flow of exhaust gases increase which increases the speed
of the turbine/compressor assembly and the output of the turbocharger. The flow of exhaust
gases through the turbocharger is controlled by the Exhaust By-pass Valve or wastegate
.
FIGURE 11-2. BASIC TURBOCHARGER