DCE80-100E
Technical Handbook
Engine TWD731VE
Description
13
P.Group 30
TDCE01
04GB
Turbocharger
The turbocharger supplies more air to the combustion chambers
than the engine would be capable of drawing naturally. This ena-
bles the engine to burn more fuel which, in turn, increases the en-
gine output.
The turbocharger consists of a turbine wheel and a centrifugal
compressor impeller, each with a separate casing but mounted
on a common shaft.
The exhaust gases provide the energy necessary for driving the
turbine wheel which, in turn, drives the compressor.
The turbocharger is lubricated and cooled by the lubricating oil
from the engine.
Intercooler
In intercooling, the air that has been compressed and heated by
the turbo is cooled in an intercooler.
The intercooler increases the oxygen supply for combustion so
allowing the injected fuel to be burnt more effectively whilst re-
ducing guel consumption as well as the level of exhaust emis-
sion.
Intercooling also reduces the thermal stressed on the engine, in-
creasing durability and reducing oil consumption
Inlet manifold heater
Before the air is admitted into the combustion chamber, it flows
across an electrically heated starting element. This has a high
rating of 3 kW and heats the intake air sufficiently for the engine
to start at low ambient temperatures. The heater element is ener-
gised when the starting key is turned. Suitable preheating time is
about 50 seconds.
1. Exhaust gases to silencer
2. Air to the engine intercooler
3. Exhaust gases from the engine
4. Intake air
Turbo charger
1. Air from turbocompressor
2. Engine cooling system
3. Air to combustion chamber
1. Heater element
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