DCE80-100E
Technical Handbook
Engine TAD720VE
Description
29
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
The intercooler is of the air-to-air type and integrated with the ra-
diator and the gearbox oil cooler.
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 ambi-
ent temperatures. The starter heater is automatically controlled
through separate electronic circuits.
1. Exhaust gases to silencer
2. Air to the engine intercooler
3. Exhaust gases from the engine
4. Intake air
Turbocharger
4
3
1
2
KL1633
1. Intercooler air-to-air
2. Radiator, air-coolant
3. Oil cooler gearbox, air-oil
4. Inlet manifold heater
4
1
2
3
Radiator
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