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equipped with the air suspension and PASM options,
the offroad setting is activated. It is also possible to
select the special offroad level via the rocker switch for
the air suspension system, in order to further increase
the approach and departure angles and the ramp ang-
le as well as fording depth.
If the driver selects offroad mode 2, the longitudinal
clutch is locked up to 100 per cent for better traction
in difficult offroad conditions. The electronically con-
trolled rear differential lock of the optional Porsche
Torque Vectoring Plus (PTV Plus) is integrated in the all
-wheel drive control. Fully automatically, it provides
for suitable metering of power on especially poor off-
road surfaces. If a rear wheel begins to spin on a slip-
pery or loose-packed surface, the differential lock res-
tores traction by intelligently redistributing drive
power to the other rear wheel. When conditions requi-
re it, another press of the offroad rocker switch selects
offroad mode 3 which fully locks the rear differential.
Porsche Torque Vectoring Plus for even greater agility
Performance and stability of the Cayenne S Diesel can
be optimised even further with the new optional Por-
sche Torque Vectoring (PTV Plus). PTV Plus operates
with variable torque distribution to the rear wheels
and an electronically controlled rear differential lock.
Cars
PTV Plus improves steering behaviour and steering
precision by specific brake interventions at a rear
wheel; its control is based on the steering angle and
steering rate, accelerator pedal position, yaw rate and
vehicle speed. Stated more precisely: In a dynamic sty-
le of driving, turning the steering wheel results in slight
braking of the wheel at the inside of the bend. This
gives the rear wheel at the outside of the curve greater
drive force, which generates additional turning force in
the steered direction. This results in more direct and
dynamic steering into the bend.
PTV Plus significantly enhances agility and steering pre-
cision at low and moderate speeds. The electronically
controlled rear differential lock provides for better dri-
ving stability, especially when accelerating quickly out
of fast driven bends or if wheelspin is occurring. Even
on split roadway surfaces, or when roads are wet or
snow covered, the system interacts with Porsche Trac-
tion Management and Porsche Stability Management
to offer benefits in driving stability. In offroad use, PTV
Plus reduces slip at the rear wheels. In addition, brake
interventions are specifically adapted to offroad use.
From the offroad rocker switch on the centre console,
the rear differential lock can be locked up to 100 per
cent.
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