Siemens EA6**GE Series, Instructions For Installation And Use Manual

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Vehicle yaw/
course deviation
Vehicle yaw/
course deviation
Correction to
vehicle course
deviation and
stabilisation
Correction to
vehicle course
deviation and
stabilisation
Oversteer without PSM Oversteer with PSM
Understeer with PSM Understeer without PSM
Performance | Chassis
As standard, all Panamera models
are equipped with enhanced
Porsche Stability Management
(PSM), which maintains stability
even at the limits of dynamic
driving performance. Sensors
continuously monitor the direction,
speed, yaw velocity 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 be gins to oversteer or
understeer, PSM applies selective
braking on individual wheels to
restore stability.
Under acceleration on wet or low-
grip road surfaces, PSM improves
traction – and agility – using the
automatic brake differential (ABD),
antislip regulation (ASR) and
engine drag torque control (MSR).
When ‘SPORT PLUS’ mode is
selected on the optional Sport
Chrono Package Plus (p. 74) or
Sport Chrono Package Turbo (p.
76), the PSM intervention thresh-
old is raised to allow a sportier
driving style.
For an even more dynamic expe-
rience, you always have the
option to deactivate PSM. It is
automatically reactivated, for your
safety, only if you brake harder
and either of the front wheels (in
SPORT PLUS mode, both of the front
wheels) requires ABS assistance.
ABS and ABD, however, remain
active at all times.
For an even higher level of active
safety, the enhanced PSM includes
two additional functions: pre-
charging of the brake system, and
brake assist.
If you suddenly release the accel-
erator pedal, PSM detects the
release of the throttle and auto-
matically readies the braking
system. This precharging of the
braking system builds up a small
amount of pressure so that the
brake pads are already in light
contact with the brake discs. If
you actually need to apply the
brakes, maximum braking power
is therefore achieved much
sooner, which reduces the stop-
ping 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 decelera-
tion is immediately available.
PSM therefore offers a high level
of driving stability and safety com-
bined with extraordinary agility.
In line with the Porsche philosophy.
Even a Porsche has limits to its dynamic performance.
Porsche Stability Management (PSM).