Porsche 911 Turbo User Handbook Manual page 29

Porsche Active Suspension Management (PASM).
From ultimate comfort to optimum performance,
all at the push of a button.
Included as standard equipment, PASM uses a series of sensors to
Porsche Active Suspension monitor the movement of the
Management (PASM) is an electronic body, e.g., under acceleration and
active damping system. It offers braking, during cornering manoeu-
continuous adjustment of the vres as well as on poor road
damping force on each wheel based surfaces. The PASM control unit
on current road conditions and then evaluates this data and
driving style. modifies the damping force on each
individual wheel in accordance
PASM has two driver-selectable with the selected mode. The results
setup modes, 'Normal' and 'Sport', are a reduction in pitch and roll
which share a minimal degree as well as consistent road contact
of overlap. While 'Normal' provides on all four wheels.
a blend of performance and
comfort, the 'Sport' setup mode If 'Sport' mode is selected, the
has a much firmer range of suspension is set to a harder
settings. The system responds to damper rating. If the quality of the
changing road conditions and/or road surface falls below a certain
driving style by continuously varying threshold, the system immediately
the individual damping forces changes to a softer rating within
within the parameters defined for the 'Sport' setup range. This
the selected setup mode ('Normal' adjustment enhances occupant
or 'Sport'). comfort as well as traction and grip.
When the road surface improves,
PASM automatically reverts to the
original, harder rating.
If 'Normal' mode is selected, and
the car is driven more assertively,
PASM automatically switches to
a harder rating within the 'Normal'
setup range. As the dampers
become stiffer, the car becomes
more stable, ensuring higher
levels of active safety as well as
greater enjoyment from your
Porsche.
Limited-slip differential.
Vehicles with a manual gearbox
are also available with an optional
mechanical limited-slip rear
differential. Key benefits include
greater rear-end traction on
the exit of bends as well as on
variable-grip surfaces. It also
compensates for changes in load
caused by throttle modulation
when cornering.
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911 Turbo |
Rebound in 'Normal' mode – Rebound in 'Sport' mode –
damper piston with bypass damper piston with bypass
valve open valve closed
Compression in 'Normal' mode – Compression in 'Sport' mode –
damper piston with bypass damper piston with bypass
valve open valve closed
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Chassis