Charge air cooling
Cooling and lubrication
47
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
One charge air cooler is installed for each cylinder
bank. Both charge air coolers are connected to the
low-temperature cooling circuit with low-tempera-
ture cooler, expansion reservoir and charge air
cooler circulation pump.
The heated charge air surrenders its heat to the
cool
ant fl
owing through the charge air cooler (air/
water heat exchanger). The coolant in turn releases
the absorbed heat to the ambient air in the low-
temperature cooler.
The coolant is pumped through the circuit
by
the
on-demand electric circulation pump, which is
switched on and off by the engine control unit
according to the charge air temperature.
The cooled sir downstream of the charge air coolers
has a higher density. This increases th
e cylinder
charge and thus the engine power. In addition, the
tendency to knock is decreased and the lower
exhaust temperatures reduce the formation of
nitrogen oxides (NOx).
P09.41-2634-00
Low-temperature cooling circuit (LT circuit)
1 Low-temperature cooler
2Feed line
3 Left charge air cooler
4 Right charge air cooler
5 Service valves
6 Return line
7 Expansion reservoir
M44 Charge air cooler circulation pump
– This printout will not be recorded by the update service. Status: 06 / 2012 –
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