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Porsche Stability Management (PSM).
Enhanced Porsche Stability Management
(PSM) is fit ted as standard. This system
automatically maintains stability even
at the limits of dynamic driving perfor -
mance. Sensors continuously monitor
the speed, yaw velocit y and lateral
acceleration of the car. Using this
information, PSM is able to calculate the
actual direction of travel at any given
moment. If the car begins to oversteer or
understeer, PSM applies selective braking
on individual wheels in order to restore
stability. Under acceleration on wet or low-grip
road surfaces, PSM improves traction –
as well as agilit y and safet y – using the
automatic brake differential (ABD) and
anti-slip regulation (ASR). Integrated ABS
is designed to minimise braking distances.
If you prefer an ever sportier drive, PSM
can be switched off. For your safet y,
however, PSM remains set to intervene if
the vehicle is braked and ABS assistance
is required. ABS and ABD remain switched on at all times. Also included with PSM
are engine drag torque control (EDC),
precharging of the brake system and
brake assist. If you suddenly release the
accelerator pedal, PSM automatically
prepares for your next action: the braking
system is precharged so that the brake
pads are already in light contact with the
brake discs. Maximum braking power is therefore achieved much sooner. Brake
assist detects a panic braking situation
and generates the brake pressure
required for maximum deceleration.
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Dynamic gearbox mounts.
Dynamic gearbox mounts are included
as part of the optional Sport Chrono
Package. They are designed to enhance
both performance and comfort.
The electronically controlled system
minimises the oscillations and vibrations of the entire drive train, especially the
engine.
The gearbox is bolted to the body by t wo
mounts. Like any mass, it obeys the law
of inertia. This means that it will continue
moving in a uniformly straight line unless
some force causes it to change direction. Put more simply: when you are driving
into a bend, the vehicle will follow your
steering but, at first, the mass of the
drive train will not. This means that the
rear of the vehicle will ultimately be
pushed out wards as a result of the drive
train’s force of inertia.
Dynamic gearbox mounts minimise this
effect. Steering angle and both longitudi
-
nal and lateral acceleration are constantly
recorded by sensors. The stiffness and
damping performance of the gearbox
mounts adapt to changes in driving st yle
and road surface conditions, which is
achieved by use of a fluid with magnetic properties. This results in greater
traction, perceptibly more stable handling
under load change conditions and in
fast corners and, in conjunction with the
‘Launch Control’ function for example,
extremely fast acceleration. Using the SPORT or SPORT PLUS but ton
you can switch the dynamic gearbox
mounts from ‘Normal’ to ‘Sport ’ or
‘Per formance’ mode and intensif y your
driving pleasure. In conjunction with optional PCM, the
G -Force graphic on the TFT screen in
the right-hand circular instrument enables
you to view the lateral and longitudinal
forces as they act on the vehicle.
1 Dynamic gearbox mounts
