Charge Air Cooler - BMW 745i Repair Instructions

~
I
I
1.3.3 Charge Air Cooler
, ~)
~t?o
73013088
The air temperature rises considerably when supercharging the intake air in the compressor of the ex-
haust gas turbocharger.
The high temperature of the air has two disadvantages.
a) Heating the air will reduce its density and consequently the volumetric efficiency (cylinder charge).
b) The combustion temperature will rise and therefore also the thermal engine loads.
These disadvantages can be avoided' by applying a charge air cooler.
12