Direct Fuel Injection (Dfi); Auto Start Stop Function - Porsche Panamera GTS User Handbook Manual

Direct fuel injection (DFI).

With millisecond precision, DFI injects
fuel at up to 1,740 psi directly into the
combustion chamber by means of elec-
tromagnetically actuated injection valves,
thus ensuring homogeneous distribution
of the air/fuel mixture, and, therefore,
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Sport exhaust system
16
effective combustion. As the mixture
is prepared directly in the cylinders,
DFI improves the internal cooling of
the combustion chambers compared
with that of a manifold injection system.
The achievable compression ratio of
12.5:1 helps to ensure a high level of
engine efficiency.
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VarioCam Plus.
The Panamera GTS is also equipped
with VarioCam Plus which automatically
adjusts the intake camshafts and
switches the lift of the intake valves.
In the middle and low load ranges,
low valve lifts with advanced timing
reduce fuel consumption and exhaust
emissions and improve smooth
running. High torque and maximum
output are achieved through high
valve lifts and retarded timing.
How does this benefit you? Extra-
ordinary acceleration power with
comparatively low fuel consumption.

Auto Start Stop function.

The Auto Start Stop function is also
standard in the Panamera GTS. If, for
example, you stop at traffic lights and
keep your foot on the brake pedal, the
system will automatically switch the
engine off. This fuel-saving system
restarts the engine as soon as you
release the brakes.
A key advantage is that there is no
need for you to change your driving
habits. You can simply carry on as
normal. All audio and communication
systems remain switched on and the
climate control continues to maintain
your selected temperature, despite the
engine being switched off. The engine
restarts if more power or extra cooling
output is required.
The Auto Start Stop function can be
activated and deactivated using a
separate button. The function may