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AB Volvo Penta / Diesel Engine TAMD71B
7.10 Charge air cooler (CAC)
The inlet air passes through the charge air
cooler(s) after compression in the turbocharger.
The charge air cooler lowers the temperature of
the air and thereby considerably improves the
output ratio as the volume of the air is reduced.
More air (oxygen) can therefore be forced into
the engine’s cylinders and burn more fuel per
compression stroke; thus increasing output.
Charge air cooling also helps reduce the thermal
load on the engine.
See also “Heat exchanger and charge air cool-
er” in chap. 10.3.
Fig. 7.3 Turbocharger
1. Compressor wheel
2. Compressor housing
3. Bearing housing
4. Turbine housing (freshwater cooled)
5. Turbine with shaft
7.8 Air Cleaner (ACL)
The air cleaner prevents harmful particles from
being sucked into the engine.
TAMD71 have a dry filter with disposable filter
elements of folded paper.
It is vital to replace/clean the filters in accord-
ance with the maintenance schedule. A blocked
filter results in smoky exhaust emissions and
less engine output.
7.9 Turbocharger
The engines are fitted with a turbocharger driven
by the exhaust gases which ensures a flow of air
to the engine under pressure and thereby in-
creases the amount of oxygen to the engine.
The compressor, which is fitted to the exhaust
manifold at the rear of the engine, is lubricated
and cooled by the engine’s lubricating oil.
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