X Series E70 X5 3.0Si (N52K) OFFRD
"Dynamic Performance Control".
The rear axle transverse torque distribution specifically distributes the drive torque between both wheels on the
rear axle.
With the new development, the rear axle transmission of the conventional design is supplemented by 2
planetary gearboxes with override function. These planetary gearboxes can if required by integrated in the
powertrain via a disc set. Independently of the required drive torque of the engine, a differential moment of up to
1800 Nm can be actively set between the left and right rear wheel.
Benefits:
•
Optimum directional stability as well as reduced steering effort
•
Improved traction
•
Increased driving safety
The chassis control systems are still interconnected, even if they function largely independent of each other.
The innovative architecture of the Integrated Chassis Management (ICM) takes over the role of a superordinate
control unit, opening up new potentials in driving dynamics. The ICM as the central controller in the vehicle
compiles all the available individual items of information and distributes these in a coordinated and concerted
manner to the chassis control systems.
On the basis of a comprehensive analysis of the driving status derived from a wide variety of information, the
ICM can decide: Which servo interventions in the respective driving context are most likely to harmonise driver
wishes and vehicle reaction. By means of networking via ICM, new functions are also created that are only made
possible by the interaction of several control systems.
Thus the Dynamic Performance Control ( rear axle transverse torque distribution) interacts dynamically with
Dynamic Stability Control, Active Steering and dynamic drive.
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Chassis
From an electrical point of view, the chassis has been modified with respect to the following systems:
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Dynamic Stability Control
The vehicle is equipped as standard with Dynamic Stability Control (DSC).
DSC is a development of the DSC 8Plus.
For ease of identification this chassis control system is known as "Premium".
The control functions of DSC have been further optimised. The improvements have been achieved through the
use of a return pump with 6 pistons as well as more efficient electronics. The extended functions of the DSC are:
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Brake standby by preemptive application of brake shoes in case of need (creation of low anticipatory brake
pressure)
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"Dry braking" of the brake discs on wet roads when wiper switched on
-
Detection of fading and increase in brake pressure during fading
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Start-off assistant
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Cruise control with brake function (option 544)
-
Parking brake (electromechanical and hydraulic parking brake)
> from 09/2007: additionally with automatic-hold function
New from 10/2007:
The DSC is equipped with the function "Drive dynamic brake intervention". To this end, the software in the DSC
has been changed. No additional hardware is required.
Drive dynamic brake intervention increases agility and reduces understeering. This improves the handling
SBT Electrical systems E70, E71
BMW AG - TIS
07.02.2013 11:39
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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