Porsche PANAMERA 4S -, Брошюра

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How does this benefit you?
Extraordinary power with
relatively low fuel consumption.
In the middle and low load ranges,
low valve lifts with advanced
timing reduce fuel consumption
and exhaust emissions and
improve smooth running. The
increase in fuel economy is
particularly pronounced in the
lower engine speed range. High
torque and maximum output
are achieved through high valve
lifts and advanced timing.
VarioCam Plus.
VarioCam Plus is a two-in-one
engine concept for adjusting the
intake camshafts and switching
the lift of the intake valves.
The system first differentiates
between driver inputs that
typify normal, everyday driving
and those inputs that demand
maximum performance. The
electronic engine management
system then seamlessly adapts
valve operation to the prevailing
conditions. This results in instant
acceleration and extremely
smooth running.
The valve lift adjustment system
comprises a series of selectable
bucket tappets, which are control-
led by an electro-hydraulic switch
valve. The continuously variable
intake timing is controlled by a
lightweight camshaft controller
made of solid aluminium.
output at the same time as
enhanced engine efficiency.
Injection is regulated by the
electronic engine management
system and emissions are
monitored by the stereo lambda
sensors, thus helping to protect
the environment. effective combustion. At up to
3,500 rpm, the engine operates
with dual injection for faster heat-
ing of the catalytic converters
after a cold start and for greater
torque in the upper load range.
DFI improves the internal cooling
of the combustion chamber
by having the mixture prepared
directly in the cylinder. This
allows for a higher compression
ratio, which helps to deliver more
With millisecond precision,
DFI injects fuel at up to 120 bar
directly into the combustion
chamber by means of electro-
magnetically actuated injection
valves.
The spray and cone angles have
been optimised for torque, power
output, fuel consumption and
emissions by enabling a homo-
geneous distribution of the air/
fuel mixture, and, therefore,
A sense of relaxation is felt especially after a period of intense pressure.
Direct fuel injection (DFI).
VarioCam Plus
Performance | Engine
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