The intake path length is determined by the fun-
nel position. If the engine speed is less than
3,500 rpm, the funnel is in the longer intake
path length position.
This means that the intake air must cover a
longer path to reach the cylinders.
•• IInnttaakkee mmaanniiffoolldd sseett ttoo lloonnggeerr iinnttaakkee ppaatthh..
When an engine speed of 6,200 rpm is
reached, the rotor is adjusted to the shorter
intake path position. The intake path to the
cylinders is now short.
The funnel can be progressively adjusted to any
point between the long/short intake path posi-
tions.
•• IInnttaakkee mmaanniiffoolldd sseett ttoo sshhoorrtt iinnttaakkee ppaatthh..
Funnel adjustment is carried out by the drive unit, which is located on the rear of the intake
manifold housing. The drive motor adjusts the drive shaft with funnels (cylinder bank 1-4).
The second shaft with funnels for cylinder bank 5-8 is synchronously adjusted by the spur
gears.
The drive motor is controlled by the ECM and
provides feedback about the funnel position via
an integral potentiometer.
11
N62 Engine
42-02-11
42-02-10
42-02-81
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