Drive systems and chassis | Drive systems · 30
29 · Drive systems and chassis | Drive systems
Hybrid, diesel, petrol. Many different options.
One outcome: Porsche.
Drive systems.
The drive system of the
Cayenne S Hybrid.
Hybrid drives are suitable for use in a
wide range of scenarios. On road, off
road or on the track – to us, it ’s about
using technology in the most intelligent
way. This enables us to introduce hybrid
technology into a variet y of different
vehicle concepts.
The clearest proof of this is the 918 Spyder
– a concept study for the super sports car
of the future. The electric machines in its
plug-in hybrid system work in conjunction
with the high rpm
engine to deliver out-
standing performance with incredibly low
fuel consumption.
Another example of a track- derived racing
vehicle is the 911 GT3 R Hybrid. With
its front-wheel hybrid drive and fly wheel storage system, it is an extremely
modern
interpretation of a thoroughbred
racecar with great potential for the
future.
With the Cayenne S Hybrid, our primary
focus was on meeting customer require -
ments in terms of athleticism, high effi -
ciency and greater everyday practicality.
The result: the parallel full hybrid.
The Cayenne S Hybrid has a 3.0 -litre V6
supercharged engine. The charging
effect of the compressor ensures high
levels of torque, even at low engine
speeds. The unit generates an output of
245 kW (333 hp). 440 Nm of torque is
available bet ween 3,000 and 5,250 rpm,
enabling a low-rev, economical driving
style while offering exceptional reserves
of power. At 288 volts, the electric machine has
a maximum output of 34 kW (47 hp).
The benefits of the synchronous motor
with inner rotor design are extremely
compact dimensions and high levels of
efficiency. It also acts as a starter motor
and alternator.
Working in tandem, both units provide
a total output of 279 kW
(380 hp) and
maximum torque of 580 Nm,
propelling
the car from 0 to 100 km/ h in just
6.5 seconds. These are the levels of
acceleration you would usually expect
from an eight- cylinder unit, but with
a combined fuel consumption of
8.2 l/100 km in the EU cycle.
1)
On the parallel full hybrid system, the
electric machine is integrated directly
into the drivetrain. The hybrid module
is situated bet ween the transmission
and the combustion engine. The engine
is engaged and disengaged using a
specially designed decoupler.
The electronic engine management
system receives all information on the
driving and energy status and controls
both drive systems to ensure optimum
performance in any driving scenario.
It shuts off the combustion engine and
switches it back on. Thanks to the ultra-
fast decoupler and instantaneous engine
start-up, all of this goes unnoticed by
the driver. Under moderate acceleration,
the electric machine can power the vehicle independently using electricity
alone. For example, for driving quietly
through residential areas. In addition,
it can be used to boost performance –
for even faster acceleration.
The parallel full hybrid concept also
comes into its own during performance
driving. When the Cayenne S Hybrid is
Parallel full hybrid
driven at high speeds and on overrun,
the combustion engine is automatically
disengaged from the drivetrain and shut
off: the car continues to ‘coast’ along.
Engine drag and the associated losses
are eliminated and efficiency is increased
at speeds of up to 156 km/ h.
1) For details on the test procedure, please refer to page 150.
Decoupler Protective housing Electric machine
Hybrid module
For fuel consumption, CO2 emissions and efficiency class data, please refer to pages 150/151.
