Fuel, Exhaust & Engine Electrics
Page 2.29
Cayenne Turbo Intake System
The illustration shows the intake system, from the air intakes behind the
left and right headlights, the air filter housings, the two pipe mass air
flow sensors, the turbocharger and the charge air cooler to the elec-
tronic throttle. A sensor in front of the electronic throttle records the
boost pressure and air temperature.
Turbo Pressure System
The pressure system in the new Cayenne Turbo is manufactured in a
plastic shell design like the variable intake system in the Cayenne S. The
pressure system comprises three shell elements, where the bottom
shell is identical to the variable intake system. It is also made of plastic,
for example, to ensure a low weight. Unlike the V8 naturally aspirated
engine, the switching flaps are not required since the charge effect is
produced by the two turbochargers. As a result, the low-loss short
intake manifold lengths are effective for the entire map. The weight of
the pressure system in the 4.8 l turbo engine compared to the 4.5 l
engine is reduced by approx. 3.3 lbs. (1.5 kg).
1 - Air intakes behind the headlights
2 - Left and right air filter housings
3 - Leftand right pipe mass airflow sensors
4 - Left turbocharger (right turbocharger is
behind the charge air cooler)
5 - Left and right charge air cooler
6 - Pressure sensor with temperature sensor
7 - To electronic throttle
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