Maserati GranTurismo Coupe Owner's Manual page 180

The "Cambiocorsa" gearbox helps
relieve the driver from bothering and
straining aspects of manual
transmission management, without
depriving him of the pleasure of
controlling gearshifting directly. In the
event that the driver, in particular
situations, prefers to give up this
option as well, the total automatic
mode can be also enabled.
The servo assisted system basically
consists of a hydraulic actuator, fitted
directly onto the gearbox housing,
which manages both the gear
selection and engagement by means
of two different pistons.
The two pistons are controlled by a
series of solenoid valves, hydraulically
powered by an electric pump and a
storage battery.
An electronic control unit, after
receiving the requests from the driver
and after evaluation of the vehicle
7
operation conditions, detected
through a series of sensors,
autonomously manages gearshifting,
thereby controlling clutch, gearbox
and engine torque directly.
180 Technical specifications
When shifting gears, the engine
control is assisted by the gearbox
control.
Interfacing between gearbox and
engine control remarkably improves
the system performance and relieves
the driver, during gearshifting, from
any need to synchronize the clutch-
accelerator operations. Actually, the
accelerator pedal can be even kept
pressed down.
The "Cambiocorsa" gearbox not only
manages the transmission upon the
driver's request, but also "tutors" and
assists him while driving.
As a matter of fact, the system is
designed to automatically exclude all
wrong gearshifting requests. As far as
driving assistance is concerned, it
furthermore ensures that the first
speed is immediately available when
the vehicle is stopped and that gears
are automatically downshifted in case
of sudden deceleration, with
subsequent sharp request for
acceleration. These aspects help
improve driving safety, since the
possibilities for the driver to carry out
wrong maneuvers are decreased.
A display on the instrument panel
indicates the gear currently engaged,
while diagnostics messages are
managed by the electronic control unit
through a warning light and a buzzer.