5 Series E60 525xd (M57T2) SAL
If the car is not fitted with a navigation system, the telephone control unit receives the converted wheel speed
signals from the front left and right wheels.
The telephone control unit uses these signals to pinpoint the car's position as precisely as possible.
System functions
The dynamic stability control system (DSC) controls longitudinal and transverse dynamics by means of engine and
brake system intervention.
Dynamic Stability Control (DSC) incorporates the following functions.
-
Anti-lock brake system (ABS)
-
Electronic brake force distribution (EBV)
-
Cornering brake control (CBC)
-
Automatic stability control (ASC)
-
Dynamic traction control (DTC)
-
Electronic brake force distribution (MSR)
-
Dynamic brake control (DBC)
-
Electronically controlled deceleration (ECD only in conjunction with ACC)
-
Trailer stabilising control (only in conjunction with trailer module for E60 and E61)
Note: Yaw-rate control by the Active Steering (AS)
Active Steering also influences the vehicle's yaw characteristics. Consequently, the software in DSC is
modified accordingly in cars fitted with Active Steering (for example, 2 DSC sensors).
Dynamic Stability Control
Dynamic Stability Control (DSC) detects the current status of the vehicle by evaluating the sensor signals. This
status is compared with the nominal values derived from a computational model. In this way, the system
recognises incipient instabilities.
The vehicle is stabilised as soon as a deviation exceeds the control threshold stored in the DSC control unit.
Stabilisation (within the limits imposed by the laws of physics) is achieved by reducing engine power and by
braking individual wheels.
DSC interventions override the ABS and ASC functions.
The DSC function can be deactivated by means of the DSC button.
Anti-lock braking system
The anti-lock braking system (ABS) stops the wheels locking during braking.
Advantage: Shorter stopping distances, the car retains its directional stability and remains steerable.
Brake pressure is regulated at all wheels to ensure that each wheel runs in the best possible slip range. When
this happens, slip is controlled so that the maximum possible braking and lateral stability forces can be
transmitted.
ABS alone is available for braking if a sensor for DSC fails or if a bus fault occurs (PT-CAN or chassis CAN).
ABS is the surviving safety function in circumstances in which DSC control is no longer possible.
Electronic brake force distribution
Electronic brake force distribution (EBV) is a component of the ABS. EBV regulates the brake force distribution
between the front and rear axles, depending on vehicle load.
SBT Dynamic Stability Control DSC 8 E60, E61, E63, E64
BMW AG - TIS
21.02.2013 10:54
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 4 -
