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powerful engagement of the
multi-plate 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.
check, among other variables,
the rotation speeds of all four
wheels, the longitudinal and
lateral acceleration of the
vehicle, and the steering angle.
If the rear wheels threaten to
spin under acceleration, a greater
proportion of drive force is
distributed to the front by a more
The electronically controlled
multi-plate clutch regulates the
distribution of drive force
between the permanently driven
rear axle and the front axle.
Through continuous monitoring
of the driving conditions, the
electronics are able to respond
to a variety of situations. Sensors
Fitted as standard in the new
Panamera 4S and Panamera
Turbo, intelligent Porsche Traction
Management (PTM) comprises
an active all-wheel drive with
an electronically mapped multi-
plate clutch, an automatic brake
differential (ABD) and anti-slip
regulation (ASR).
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).
Performance
| Transmission
All-wheel drive
In this way, PTM, in conjunction
with Porsche Stability Manage-
ment (PSM, p. 70), ensures that
the perfect distribution of drive
is achieved every time: whether
on long straights, through tight
corners, or on surfaces with
different friction coefficients.
In this situation, traction is
additionally enhanced by the
automatic brake differential
(ABD). Whenever the brake con-
trol systems are required to
intervene, PTM decouples the
front axle completely so that
PSM inter ventions can take place
at each individual wheel.
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