X Series E83 X3 2.5Si (N52K) OFFRD
VS-42 je
Baugruppe/Group: 27
27 01 03 (048)
weltweit
Datum/Date:
11/2003
Update: 02/2007
xDrive
E53, E70, E83
Introduction
xDrive is an all-wheel drive system that links Dynamic Stability Control (DSC) system to an electronically controlled
multi-plate clutch in the transfer box.
The electronically controlled multi-plate clutch smoothly distributes the drive torque as required to the front axle. The
rear axle is always powered.
All of the drive torque is applied to the rear axle when the multi-plate clutch is separated.
>
E53, E83 [system overview ...]
>
E70 [system overview ...]
xDrive constantly communicates with the DSC. The drive-dynamic input information is computed in the DSC control
unit.
Important information is:
-
Accelerator pedal position
-
Engine torque
-
Drive-dynamic state
The DSC calculates the necessary locking torque. The locking torque is communicated to xDrive. This allows xDrive
to register whether the vehicle is able to follow the driver's commands. xDrive intervenes to counter the threat of any
tendency for wheel spin, oversteer or understeer. xDrive regulates drive torque distribution between the two axles to
meet driving demands.
Only if xDrive cannot maintain the vehicle's course on its own will DSC also intervene. Engine output is reduced and
SBT xDrive E53, E70, E83
BMW AG - TIS
12.02.2013 10:08
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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