Highlight in F01/F02: Notes

The integral-V rear axle is a revolutionary further development of the integral IV rear axle now installed in many BMW models.

The integral IV rear axle fulfils the primary function of the running gear and wheel control in a unique way while making a significant contribution to driving dynamics characteristic of a BMW.

Safety functions are defined by the superior vehicle control characteristics. Effective decoupling of the road and drive train guarantees outstanding levels of acoustic and vibration comfort.

The further developed integral-V rear axle in the F01/F02 also provides these properties. In addition, the new rear axle has been specifically tuned to the new requirements of the F01/F02:

• Larger vehicle dimensions
• Greater total weight
• Greater drive output
• Higher drive torque
• Runflat tires.

In addition, the demanding objectives relating to driving dynamics and comfort have been correspondingly adapted while the new system integrates driving dynamics systems required for this purpose.

The integral-V rear axle primarily fulfils the driving dynamics functions of the mechanical chassis and suspension, i. e. define elastokinematic wheel control in all relevant driving situations.

The particularly innovative BMW development of the integral active steering (IAL), however, makes specific demands in terms of the elastokinematics  of the integral-V rear axle: To a certain extent, the wheels on the rear axle must be able to execute steering movements.