Fuel, Exhaust & Engine Electrics
Page 2.27
Cayenne S Intake System
The illustration shows the intake system, from the air intakes behind the
left and right headlights, the air filter housings with sound opening and
the two pipe mass air flow sensors to the electronic throttle.
Variable Intake System
A new feature of the Cayenne S variable intake system is that intake
manifolds of different lengths can be used due to a switching
mechanism within the intake system. The variable intake system
combines the advantage of long intake manifolds (for high torque in the
lower rpm range) with short intake manifolds (for high specific power in
the upper rpm range). A high torque curve is achieved, depending on
the position of the intake manifold switching flap in conjunction with the
optimised intake duct geometry.
1 - Air intakes behind the left and right headlights
2 - Left and right air filter housings (with sound
opening)
3 - Left and right pipe mass airflow sensors
4 - To electronic throttle 2
1 - Electronic throttle
2 - Variable intake system
3 - Diaphragm cell for switching flaps
4 - Connecting link
5 - Shaft for switching flap for cylinder bank 1
6 - Shaft for switching flap for cylinder bank 2
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