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LUCAS ACE

Product Code : SM032

EUR 92.00 (excl. VAT)
EUR 109.48 (incl. VAT)

The ACE (Active Cornering Enhancement) is only currently fitted to the Discovery series II. It is a very sophisticated system which uses a high capacity hydraulic pump, driven by the engine to supply pressure to two hydraulic arms mounted on the anti roll bars of both the front and rear axles. The pressure is normally relieved by a Pressure Control valve and the direction of force is controlled by two Direction Control Valves. The ECU controls these using inputs from a number of inputs, but mainly from two very sensitive sideways G sensors. One of these is mounted high in the vehicle and the other is mounted low. The differential between them allows the ECU to calculate cornering forces against which it should apply opposite force to prevent the vehicle from leaning. The system has the normal fault code memory functions and gives a large range of dynamic inputs. It drives the outputs to all valves, lamps and relays. It also allows calibration of the sensors which must be checked periodically and allows bleeding of the hydraulic circuits. A variety of performance tests can also be done which should fall within set time parameters to pass.

ECU Type: Suspension

Quantity:

The Active Corner Enhancement system manufactured by Rover Group Lucas appears to have been produced specifically for the Land Rover Discovery series II to address the poor cornering association of the Discovery series one. Constantly monitoring very sensitive G sensors mounted at high and low points on the vehicle, the system can detect roll forces and counter them using the output of a hydraulic pump via valves and powerful actuators mounted on both axles to resist the roll forces thus reducing cornering roll. The system is a vast improvement to the vehicles handling allowing much sharper cornering than without, and anyone used to driving with is needs to be careful should it stop working, or due to the fact that it was an optional extra, they lend a non ACE equipped vehicle, not to forget to slow down more than usual at corners. The system has very fast response requirements and as such there is much emphasis on ensuring that the system works properly and fast enough. New ECUs have to pass a number of response tests successfully before the system is commissioned to try and ensure this. There is also sensor calibration and sophisticated bleeding procedures.

Interestingly or amusingly, the ECU is housed in an identical case to the MEMS 1.9 engine management with a blanking plug fitted where the vacuum tube inlet is, no doubt a cost saving measure.

Land Rover Discovery II When Fitted Black OBDII Lead

For more detailed information about this ECU please click here.