differential PORSCHE PANAMERA 2010 1.G Information Manual

· 60 ·· 61 ·
All -wheel drive
Performance | Transmission
Fit ted as standard in the new
Panamera 4, the Panamera 4S
and the Panamera Turbo, Porsche
Traction Management (PTM) com -
prises an active all-wheel drive
with electronic and map-controlled
multi-plate clutch with automatic
brake differential (ABD) and anti -
slip regulation (ASR). The electronically controlled multi
-
plate clutch regulates the distri -
bution of drive force bet ween the
permanently driven rear axle and
the front axle.
Through continuous monitoring
of the driving conditions, the elec -
tronics are able to respond to a
variet y of situations. Sensors
check,
among other variables, the
rotation speeds of all four wheels,
the longitudinal and lateral accel -
eration of the vehicle, and the
steering angle.
If the rear wheels threaten to
spin under acceleration, a greater
proportion of drive force is distrib-
uted to the front by a more power -
ful engagement of the multiplate
clutch. In addition, ASR reduces
wheel slip. When cornering, the
front wheels only ever receive as
much drive force as is necessary
to maintain optimum lateral
stability. In this way, PTM, in conjunction
with Porsche Stabilit y Management
(PSM, p. 72), ensures that the
perfect distribution of drive is
achieved every time: whether on
long straights, through tight cor
-
ners, or on surfaces with dif ferent
friction coefficients. In this situa -
tion, traction is additionally enhanced by the automatic brake
differential (ABD).
Whenever the brake control

systems are required to intervene,
PTM decouples the front axle
completely so that PSM interven -
tions can take place at each
individual wheel.
You always like to have your feet firmly planted on the ground.
With all-wheel-drive, the principle is the same.
Porsche Traction Management (PTM).

· 70 ·· 71 ·
A Porsche holds the road well, its
handling is sport y and precise –
but you’ve known this for a long
time.
What you might not know is
that, with the optional Porsche
Dynamic Chassis Control (PDCC)
with Porsche Torque Vectoring
Plus (PT V Plus), road holding can
be even further improved in all the Panamera models for even more
dynamic per formance and
increased comfort.
PDCC is an active anti-roll system
that anticipates and significantly
reduces lateral body movement
during cornering manoeuvres. In
addition, it minimises the lateral
instabilit y of the vehicle on uneven
ground. The ef fect is achieved with the aid of active anti-roll bars
on the front and rear axles which
respond to the current steering
angle and lateral acceleration

by producing a stabilising force
that precisely negates the roll
of the body.
PT V Plus combined with PDCC is
a system that actively enhances
vehicle dynamics and stabilit y. Operating in conjunction with an
electronically regulated rear dif
-
ferential lock, it works by varying
the torque distribution to the rear
wheels. As a function of steering
angle and steering speed,
accel -
erator pedal position, yaw rate and

vehicle speed, PT V Plus is able
to improve steering response and
steering precision by specific
braking of the right or left rear
wheel.
To be more precise, this means
that when the car is driven asser -
tively into a corner, moderate
brake pressure is applied to the inside rear wheel. Consequently,
a greater amount of drive force is
distributed to the outside rear
wheel, inducing an additional
rotational pulse (yaw movement)
around the vehicle’s vertical axis.
This results in a direct and sport y
steering action as the car enters
the corner.
At low and medium vehicle speeds,
PT V Plus significantly increases
agilit y and steering precision.
At high speeds and when acceler -
ating out of corners, the elec -
tron
ically regulated rear differential
lock ensures greater driving
stabilit y. It also serves to improve
traction at the rear wheels on
road surfaces with varying levels
of grip as well as on snow and ice.
For the driver, this means remark -
able stabilit y and easier handling,
optimum traction, and greater
agilit y at every speed with precise
steering and stable load transfer
characteristics. The result is
a high level of driving pleasure.

Rapid cornering in the Panamera Turbo with PDCC (illustrative example)
Rapid cornering in the Panamera S without PDCC (illustrative example)
Performance | Chassis
A wavering course was never your thing.
Porsche Dynamic Chassis Control (PDCC)
with Porsche Torque Vectoring Plus (PTV Plus).