Porsche Cayman User Handbook Manual page 25

Porsche Active Suspension The driver can choose one of
two setup modes, 'Normal' or
Management (PASM).
'Sport'. While the first is a blend
PASM is an electronic damping of performance and comfort, the
control system. Available on 'Sport' setup ratings are generally
both Cayman models, it offers much firmer, enabling greater
continuous adjustment of agility on the racetrack. In either
individual damping forces based mode, the system responds to
on current road conditions and changing loads by automatically
driving style. Agility and driving applying the optimum damping
pleasure are significantly rate on each individual wheel.
enhanced while retaining the The rates are selected from a
car's natural ride quality. Equipped range of map options which are
with PASM, the car rides 10 mm specially adapted to the unique
lower than with the standard dynamics of the Cayman and
steel-sprung suspension. Cayman S.
The movement of the body is
continuously monitored under
acceleration, braking and cornering
manoeuvres, as well as on poor
road surfaces. Other sensors
provide additional information on
lateral acceleration, steering
angle, brake pressure and engine
torque. A dedicated control unit
provides real-time analysis and
damper adjustment as defined
for the respective setup mode
('Normal' or 'Sport'). The result:
greater stability and more
consistent occupant comfort.
If, when 'Sport' mode is selected,
the quality of road surface drops
below a certain threshold, the
system immediately switches
to a softer rating and restores
the car's traction and grip.
When the road surface improves,
PASM returns to the original,
harder ratings. The system
remains active in 'Normal' mode,
too, automatically switching to a
harder setup if the car is driven
more assertively. As the dampers
become stiffer, the car becomes
more stable and driver control is
improved.
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The new Cayman and the Cayman S |
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