Porsche PANAMERA 4S Brochure page 32

Even a Porsche has limits to its dynamic performance.
Porsche Stability Management (PSM).
As standard, all of the new is able to calculate the actual
Panamera models are equipped direction of travel at any given
with enhanced Porsche Stability moment. If the car begins to over-
Management (PSM), which main- steer or understeer, PSM applies
tains stability even at the limits selective braking on individual
of dynamic driving performance. wheels to restore stability.
Sensors continuously monitor the
direction, speed, yaw velocity Under acceleration on wet or low-
and lateral acceleration of the grip road surfaces, PSM improves
car. Using this information, PSM traction – and agility – using the
Oversteer without PSM
Vehicle yaw/
course deviation
Understeer without PSM
Vehicle yaw/
course deviation
automatic brake differential
(ABD), anti-slip regulation (ASR)
and engine drag torque control
(MSR).
When 'Sport Plus' mode is selec-
ted on the optional Sport Chrono
Package Plus (p. 72), the PSM
intervention threshold is raised to
allow a sportier driving style.
Oversteer with PSM
Correction to
vehicle course
deviation and
stabilisation
Understeer with PSM
Correction to
vehicle course
deviation and
stabilisation
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For an even more dynamic precharging of the brake system,
experience, you always have the and brake assist.
option to deactivate PSM. It is
automatically reactivated, for If you suddenly release the accel-
your safety, only if you brake erator pedal, PSM detects the
harder and either of the front release of the throttle and auto-
wheels (in Sport Plus mode, matically readies the braking
both of the front wheels) requires system. This precharging of the
ABS assistance. ABS and ABD, braking system builds up a small
however, remain active at all amount of pressure so that the
times. brake pads are already in light
contact with the brake discs. If
For an even higher level of active you actually need to apply the
safety, the enhanced PSM brakes, maximum braking power
includes two additional functions: is therefore achieved much
sooner, which reduces the
Performance
stopping distance even further.
Brake assist, on the other
hand, is able to interpret a panic
braking situation from a rapid
increase in brake pressure and
acts to ensure that the amount
of brake pressure required
for maximum deceleration is
immediately available.
PSM therefore offers a high level
of driving stability and safety
combined with extraordinary
agility. In line with the Porsche
philosophy.
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