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CitroŽn Xantia Activa

A gripping tale of innovation


PREVIEWED ON THE ACTIVA II PROTOTYPE, CITROňN’S ACTIVE ROLL LIMITATION SYSTEM IS NOW AVAILABLE ON A PRODUCTION MODEL: THE XANTIA ACTIVA. ONCE AGAIN, CITROňN IS PUTTING ITS INNOVATIVE IDEAS TO WORK FOR THE BENEFIT OF THE DISCERNING MOTORIST.



“This is total driving pleasure without the risk”, exclaimed one driver after trying out the Xantia Activa on a test run organized by the Product Marketing Division. As always, CitroŽn continues to increase overall safety, driving pleasure and dynamic comfort.

The marque is putting technology to work to offer both drivers and passengers a more pleasurable ride.

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 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 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.





When the car enters the bend, sensors inform the system’s computer about the angle and speed of rotation of the steering wheel as well as the speed of the car. Using these data. the computer increases stiffness to a maximum in order to prevent the body from rolling during this phase. Stable in the approach and the initial phase of cornering, the Xantia Activa remains so throughout the entire movement. Roll stiffness is increased momentarily at the same time as a hydraulic anti-roll device corrects the inclination of the body.
The SC.CAR roll limitation system is a natural and effective addition to the Xantia's widely acclaimed running gear, which comprises Hydractive II suspension, a self-steering rear axle and anti-lock brakes.
A number of additional safety features have been added - including side-impact door beams, driver's-side airbag and pyrotechnic pretensioners on the front seatbelts - to make the Xantia Activa’s occupants feel doubly secure.
With the Xantia Activa, Citroen has pioneered a totally new concept in automotive design.


XANTIA ACTIVA


Designed for motorists seeking comfort and safety as well as an exhilarating ride, the Xantia Activa has a number of winning features to attract the potential car buyer. The car is powered by a 2-litre 16 valve engine releasing 110 kW at 6,500rpm, with maximum torque of 18.25 daN.m at 3500rpm. The VSX version, which features anti-lock brakes and hydractive suspension, offers body colour wraparound bumpers at front and rear as well as colour keyed side stripping.

A spoiler mounted on the tailgate contributes to the flow of the car's lines and gives it a sporty look. In the passenger cabin, the leather-trimmed steering wheel conceals a driver's‚ side airbag, which is fitted as standard. The front seats with elongated cushions are velours-covered. Last but not least, the Xantia Activa is available in a brand-new colour: Inferno Red!



© 1994 le Double Chevron/2013 CitroŽnŽt See Hydraulics for more information