Fuel, Exhaust & Engine Electrics
Page 2.26
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 reflec-
tion 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.
1 - Electronic throttle
2 - Torque accumulator
3 - Power accumulator
4 - Electropneumatic shift valve
5 - Vacuum unit
6 - Operating sleeves (sealed)
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