Intake Air Side, Air Routing

Intake Air Side, Air Routing

General

The intake systems in all new Cayenne models have been redesigned for direct fuel injection (DFI) in order to achieve a high torque curve. The air cleaner elements must be changed every 72,000 miles (120,000 km) or after 4 years according to the Technical Data.

NOTE: Air filter replacement intervals have changed for M.Y. 2008 when compared to the 2003-2006 Cayenne models.

Cayenne V6 Intake System







The illustration shows the intake system, from the air intake behind the left headlight, the air filter housing with sound opening and the pipe mass air flow sensor to the electronic throttle.

The redesigned intake manifold charging system offers considerably improved filling for the V6 engine. This has resulted not only in an optimal torque curve, but has also improved performance.

Long Intake Manifold For High Torque







The operating sleeves in the intake system move into torque position when the engine is started and until an engine rpm of 4200 is reached and this is apparent from the repositioning of the operating sleeves (in direction of travel at the left front of the intake manifold). The vacuum unit pulls the lever to the left (in direction of travel). The operating sleeve seals the reflection point to the power accumulator, which renders the reflection point to the torque accumulator effective. The effective intake manifold length is approx. 610 mm in torque position.

Short Intake Manifold For High Power







If the engine rpm exceeds 4200, the power position is activated by opening the operating sleeves. The vacuum unit then presses the lever to the right (in direction of travel). The operating sleeve opens the reflection point to the power accumulator, which renders the short intake manifold effective with a length of approx. 235 mm. If activation does not occur, the system remains in power position.