Porsche Stability Management (Psm) - Porsche 911 Turbo Driver Manual

SPORT/SPORT PLUS display on the PDK steering wheel
with shift paddles
When Sport mode is switched on, the logo
SPORT/SPORT PLUS appears on the multi-
function display.
Porsche Stability Management
(PSM)
PSM is an active control system for stabilisation
of the vehicle during extreme driving manoeuvres.
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Safety instruction!
In spite of the advantages of PSM, it is still the
driver's responsibility to adapt his driving style and
manoeuvres in line with road and weather
conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greater risks with your safety.
The limits set by the physics of driving cannot
be overcome, even with PSM.
Risks of accident due to inappropriate speed
cannot be reduced by PSM.
Sensors at the wheels, brakes, steering system
and engine continuously measure:
– Speed
– Direction of travel (steering angle)
– Lateral acceleration
– Rate of turn about the vertical axis
– Longitudinal acceleration
PSM uses these values to determine the direction
of travel desired by the driver.
PSM intervenes and corrects the course if the
actual direction of motion deviates from the
desired course (steering-wheel position):
It brakes individual wheels as needed. In addition,
the engine power may be manipulated in order
to stabilise the vehicle.
The events below inform the driver of PSM control
operations and warn him to adapt his driving style
to the road conditions:
– The multifunctional information light on the
instrument panel flashes.
– Hydraulic noises can be heard.
– The vehicle decelerates and steering-wheel
forces are altered as the PSM controls the
brakes.
– Reduced engine power.
– The brake pedal pulsates and its position is
changed during braking.
In order to achieve full vehicle deceleration,
foot pressure must be increased after the
brake pedal has begun vibrating.
Controls, Safety
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