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Another
breakthrough
The Xantia Activa is equipped with the
SC.CAR roll limitation system, a major
step forward in automotive design.
Dynamic and safe, SC.CAR is underpinned
by an entirely new approach to the ride
and handling mix. The system involved an
innovation to the Xantia's running gear.
It enhances the action of Citroën‘s
Hydractive suspension system by
controlling the sideways body movement
generally known as roll.
Thanks to SC.CAR, vehicle occupants
will no longer be subjected to pitch and
bounce when the car takes a corner. The
system also allows millimetre precision
in terms of steering and handling.
But most of all, it is highly adaptive,
allowing the Xantia Activa to corner on
the level whatever the road conditions.
This feature will be highly popular with
customers who are looking for comfort
and safety in addition to a zippy ride.
Grip, wheel control and traction have
been optimized to give the car
exceptional levels of handling and
safety.
The Xantia Activa's impressive
stability, even when braking in a curve,
means that the driver can put the car
into a bend with maximum efficiency
while easily controlling configurations
which are generally beyond the reach of
conventional cars.
No more rock
‘n roll
The SCCAR roll limitation system was
first demonstrated on the Activa
2 prototype at the 1990 Paris
Motor Show.
The system has been fine-tuned to
enable the Xantia Activa to corner on
the level, thus improving safety and
increasing driving pleasure. When the
system detects a curve, the on-board
computer immediately increases roll
stiffness. If the curve continues and
the passenger cabin tilts to an angle
of0.3 deg, two hydraulic jacks kick in
to help restore the vehicle’s balance.
Roll has been eliminated.
The
art of flat cornering
The action of cornering can be broken
down into several phases: a
straight-line approach followed by a
gradual movement of the steering wheel
that increases as the angle becomes
tighter followed lastly by a
straightening of the wheel as the car
moves out of the bend. During the first
phase, any discomfort to passengers
caused by surface imperfections is
eliminated by an anti-roll sphere.
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