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
CitroŽn‘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
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.