Xantia 2.O Auto now 16 Valves with New Auto Active Transmission

Effective from June 12, 1998 the newly facelifted Citroën Xantia offers a power improvement of 10% with the addition of the 2.OL 16V (XU1OJ4R) engine.

Putting out 97.4 kW of power at 5500 rpm and 180 Nm of torque at 4200 rpm the 2.OL 16V engine replaces the 89 kW 8V.

The 2.OL 16V engine is coupled to the all new 4 speed Auto-Active transmission. Developed by Citroën, Renault and Siemens, the Auto-Active gearbox benefits from the expertise of the three companies in the fields of production, self adaptability, electronics and fuzzy logic.

Fuzzy logic is a relative logic which is used to incorporate and process a large number of parameters, even if they are uncertain or contradictory, with calculation of their relative importance. The control unit controls not only gear shifts, but also the converter. Lock-up is available on each gear which enables transmission of full engine torque without wheel spin. This system gives the Xantia models fitted with the Auto-Active gearbox low fuel consumption approaching those of manual gearbox vehicles.

The new Auto-Active transmission uses a stepped gate with a "shift-lock" safety in the PARK position and has three push buttons to activate a NORMAL SPORT and SNOW programs. The advantage of using these driving programs is that they enable the driver to stay in the program which best suits the circumstances.

In addition, the new dashboard has a gear gate display showing the gear and program selected.

The ECU is the heart of the new Auto-Active transmission receiving data from...

The gearbox (vehicles speed, turbine speed, oil temperature, lock-up status and oil pressure).

The engine ECU (rpm, load, torque).

The program selector and the pushbuttons (sport, snow, normal).

The brake pedal stop light switch.

The accelerator pedal position.

It uses the following 10 shift mode laws to adapt functioning of the gearbox to the driver's driving style, to the program chosen, interior conditions - transmission temperature and pressure - and exterior conditions - road contours, grip, vehicle load, acceleration or deceleration:

"Eco" Law: Driving style favouring low consumption and a driving style for which the engine load is stable.

"Medium" Law: Mixed driving style with emphasis on the engine speed mid-range.

"Sport" Law: Driving style emphasising high engine speeds and using all of the engine's potential (possibility of manual selection).

"Gradient 1" Law: Driving on an average gradient.

"Gradient 2" Law: Driving on a steep gradient.

'Descent" Law: Driving using the engine brake.

"Snow" Law: Driving on a slippery surface avoiding harsh braking (manual selection).

"Engine Cold" Law: Driving emphasising low or intermediate engine speeds with engine cold.

To these 8 laws, we can add:

Cold weather functioning law - not locked up - up to 15°.

High Transmission oil temperature - from 130°

This completely new transmission gives the Citroën Xantia driver control without the constraints. The Auto-Active box adapts to the driver's every whim, so you can chose in favour of economy or opt for a more sporty driving style and faster acceleration. The Citroën Xantia with Auto-Active transmission offers numerous possibilities combining the relaxation and comfort of conventional automatic gearboxes with "driving pleasure".