Porsche CAYENNE Brochure page 25

The epitome of adaptability. And that's just the engine.
Variable valve timing in the V6 engine.
The V6 engine in the Cayenne management system via rotary-
features variable valve timing on vane adjusters.
both inlet and exhaust.
Each cylinder has four valves
The camshaft phase angles are actuated by roller cam followers
continuously varied by the engine featuring hydraulic valve clearance
adjustment. The results: high
specific power and torque – even
at low engine speeds. Above all,
this technology improves fuel
economy while further reducing
emissions.
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Increasing torque.
Reducing fuel consumption.
VarioCam Plus in the V8 and V8 turbo engines.
VarioCam Plus creates two engines
out of one by steplessly adjusting
the inlet valve timing and lift.
The system differentiates between
normal road usage and performance
driving, adapting seamlessly as
driver inputs change. All functions
are automatically controlled by
the engine management system.
All you experience is responsive
acceleration and ultra-smooth
running characteristics.
Plus selects the higher lift setting
The valve lift system consists of and retards valve timing.
electro-hydraulically switchable
tappets. At medium revs and minimal
load, the valve lift is lowered and
Inlet valve timing is steplessly timing advanced to minimise
varied using rotary-vane adjusters. fuel consumption and emissions.
To improve response when starting At low engine speeds in particular,
from cold for example, VarioCam VarioCam Plus significantly
VarioCam Plus (V8 engines)
improves fuel economy. To achieve
maximum power and torque, the
valve lift is raised and the timing
advanced.
Overall, the system offers
greater reserves of power and
torque with relatively modest
fuel consumption.
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Drive