Doosan DP158L Series, Руководство по эксплуатации и техническому обслуживанию

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9. Intake/exhaust system
137
General information
General Information
The exhaust gas of the engine passes through the turbine
wing of turbocharger to rotate the rutbine. At the same time,
the impeller air of the compressor mounted on the other end
of same shaft rotates to suck in the fresh air through air filter,
and delivers it to the cylinder through inter cooler with high
pressure.
The turbocharger is air-cooled. The bearing is lubricated by
the lubricant supplied from the engine lubrication system.
The engine power depends on the supplied fuel amount and
engine efficiency.
In order to make the supplied fuel burned completely to work
for the engine efficiently, the sufficient air should be delivered
to the cylinder. That is, the enfine power is virtually deter-
mined by the size of cylinder. If compressed air is delivered
to the cylinder with a given capacity, the air amount in the
cylinder increases to burn more fuel, thereby increasing the
engine power.
The method of compressing the air to supply it into the
engine cylinder is called supercharging; and the method of
using the exhaust gas discharged from the combustion
chamber for the same purpose is called turbocharging.
DV2213107A
No. Name No. Name
1. Compressor casing A. Air inlet
2. Turbine casing B. Exhaust gas outlet
3. Compressor wheel C. Exhaust gas inlet
4. Impeller D. Engine oil delivery
5. Turbine E. Engine oil recovery
C
5
3
2
B
E
4
1
A
D