Skyhook Suspension - Maserati GRANCABRIO Owner's Manual

Skyhook suspension (*)

The electronic system controlling
the vehicle suspension uses the
sophisticated on board sensors
and is aimed at optimising vehicle
performance.
The system is capable of constantly
monitoring suspension damping by
means of the actuator fi tted on each
shock absorber. This way, the shock
absorber setting is suited to the
road surface conditions and vehicle
dynamics, thus improving passenger
comfort and road-holding.
By pressing button A the drivers
can choose, even while driving, a
5
normal or racing-type setting for the
suspension, depending on their own
driving style. This way, the system
operates with a shock absorber
"softer" setting in Normal mode, and
a "harder" setting if SPORT mode is
selected.
(*) This system is linked to the model
and market availability.
164
The system is controlled by an ECU
which manages the solenoid valves
on each shock absorber in response
to the sensor signals, thus adjusting
suspension damping and setting.
The sensors which enable the ECU
to calculate the vehicle speed,
vertical and side acceleration, as
well as the instantaneous braking
system pressure, thereby controlling
suspension damping, are the
following:
- front left-hand vertical acceleration
sensor;
- front right-hand vertical
acceleration sensor;
- rear vertical acceleration sensor;
- front left-hand wheel acceleration
sensor;
- front right-hand wheel acceleration
sensor;
- lateral acceleration sensor;
- driving speed sensor;
- brake pedal switch.
The strategy used by the system
controlling suspension damping
is aimed at reducing the vertical
oscillations of the vehicle (rolling and
pitching) to a minimum.
The activation of SPORT mode sets
the suspension for sports-style driving
and acts on the ASR and Automatic
Gearbox systems as well, modifying
their setting for racing-style driving.
Self-diagnostics
Whenever the engine is started, the
system performs a self-diagnostic
cycle. If a malfunction is found,
the relative icon is displayed
accompanied by the message "Check
suspensions".
A