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Engine, Mechanics
Variable-intake manifold in 3.7 l engine
Operation of the 3-stage variable-intake
manifold is described in SSP 217.
SSP282_017
This is the same 3-stage variable-intake
manifold as previously fitted in the V8 engine.
Due to the piston stroke of only 82.4 mm,
three resonance tube lengths are required to
achieve resonance effects in the lower engine
speed range.
Changeover points:
– Long to short
at 3,280 rpm
– Short to long
at 3,120 rpm
– Short to shorter
at 5,120 rpm
– Shorter to short
at 4,920 rpm
Changeover flap, stage 3
From electronic throttle
Throttle valve
Intake air (inlet)
Changeover flap, stage 2
(open)
Resonance tube, cyl. 5
(inlet end)
Vacuum unit
Changeover flap, stage 2
Vacuum unit
Changeover flap, stage 3
Injector
mounts
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