3 Series E90 328xi (N52K) SAL
VS-42 je
Baugruppe/Group: 27
27 01 05 (128)
weltweit
Datum/Date:
03/2005
Update: 08/2006
xDrive
E60, E61, E90, E91, E92
Introduction
xDrive is already in use on the E53 and E83. Because of the small amount of space available on the E60, E61, E90,
E91, E92 transmission tunnel, it was not possible to use the xDrive from the E83 (ATC 400).
The transfer case ATC 300 is used on the E60, E61, E90, E91, E92. (ATC = Active Torque Control)
[System overview ...]
xDrive consists of a link between the Dynamic Stability Control (DSC) and an electronically controlled multi-plate
clutch in the transfer case.
The electronically controlled multi-plate clutch smoothly distributes the drive torque as required to the front axle. The
rear axle is always driven.
When the multi-plate clutch is open, the entire drive torque flows to the rear axle.
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
SBT xDrive E60, E61, E90, E91, E92
BMW AG - TIS
18.02.2013 22:36
Issue status (12/2007) Valid only until next DVD is issued
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