Central Driving Dynamics Control
The aim of the interventions by the dynamic driving system is to improve agility and traction. If required, they can of course also restore the stability of the vehicle. In previous vehicles, separate systems existed that were designed to do this and although they in fact communicated with each other, they tended to have a more restricted range of tasks. The interaction of all systems that ultimately determines the overall driving characteristics was therefore difficult to coordinate.
The Integrated Chassis Management of the F01/F02 incorporates the central driving dynamics control. This compares the command given by the driver with the actual movement of the vehicle at that point and therefore determines whether intervention of the dynamic driving system is required, and also the extent of the intervention.
The yawing force is an output variable of the central driving dynamics control system. This produces a rotation of the vehicle that is superimposed on the existing movement of the vehicle.
This can be used to "readjust" the driving characteristics if the result identified does not match the driver's command. Classic examples of this are understeering or oversteering driving characteristics.
A new feature of the ICM installed in the F01/F02, however, is that the dynamic driving systems are already deliberately activated before a deviation of this nature is identified. The interventions of the dynamic driving systems therefore take place long before the driving characteristics become unstable.
This produces a far more harmonious effect in the vehicle than would be possible from a conventional chassis design. The vehicle reacts neutrally in many more situations and does not even begin to understeer or oversteer. This new function is possible through the use of extremely precise computing models and new control strategies that can be used to evaluate and influence the driving characteristics.
| Index | Explanation |
|---|---|
| A | Correction of unstable driving characteristics |
| B | Intervention at an early stage to achieve neutral driving characteristics |
| 1 | Braking intervention at individual wheels in order to correct understeering |
| 2 | Braking intervention at individual wheels in order to prevent understeering |
| 3 | Course of an understeered vehicle |
| 4 | Course of a vehicle with neutral driving characteristics |
| M | Yawing force that acts on the vehicle due to braking intervention (at individual wheels) |