3334
Thermal Management
The thermal management system
regulates the temperature in the engine
and transmission through the intelligent
manipulation of heat flow. It allows the
engine and transmission to reach their
optimal operating temperatures sooner.
The result? Combustion efficiency and
lubrication performance are improved,
and fuel consumption is reduced.
Auto Start Stop Function
The Auto Start Stop function is standard
in the new 911 Turbo models. When
the speed falls below 4 mph and the
911 Turbo is decelerating normally, the
engine switches off. For example, as you
are slowing while approaching a red light.
Audio and communication systems
remain switched on. The climate
control continues to maintain your
selected temperature. The engine
starts again when you release the
brake or move the steering wheel.
The Auto Start Stop function may remain
inactive under particular circumstances,
for example if the bat tery charge is
low, when the Sport but ton is selected,
or when there are extreme outside
temperatures. It is also possible to
deactivate the function manually using a
separate button on the center console.
Electrical System Recuperation
Another fuel-saving innovation that’s
standard on the new 911 Turbo models
is electrical system recuperation
technology. It captures the energy
created during events such as braking.
The vehicle bat tery is recharged by
the alternator, predominantly under
braking. Under acceleration, on the
other hand, the power draw of the
alternator is limited to increase the
engine output available for driving.
The electrical systems are supplied
by the electrical energy stored
during the recharging process.
3536 Power | Transmission
To make something happen,
you have to be able to convey your principles.
Transmission.
1 Power transmission in 1st gear
Porsche Doppelkupplung (PDK)
All of the new 911 Turbo models
feature the enhanced PDK transmission
with manual and automatic modes.
Porsche engineers have yet again
increased the speed and smoothness
of gear shifts. For the driver, this
means even faster shifting through
the gears without interrupting the flow of power. Acceleration
is exceptional, fuel consumption
is optimized, and performance is
delivered at a high level of comfort.
PDK has seven gears at its disposal.
Gears 1 through 6 have a sport ratio
and top speed is reached in 6th gear.
The 7th gear has a long ratio and
helps to reduce fuel consumption
by keeping engine revs low.
PDK is essentially t wo transmissions in
one. This double-clutch arrangement
provides an alternating, non-positive
connection between the two half gearboxes and the engine by means
of t wo separate input shafts.
The flow of power from the engine is
transmit ted through one half gearbox
and one clutch at a time, while the
next gear is preselected in the second
half gearbox. During a gear change, one clutch simply opens and the other
closes at the same time, enabling shifts
to take place within milliseconds.
Depending on the gearshift program
(Sport button activated or deactivated),
the shift of gears is optimized for
comfort or for sporty driving.With the optional Sport Chrono Package
(standard in the 911 Turbo S models),
PDK is enhanced by the Launch
Control and motorsport-derived
gearshift strategy functions.
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