5 Series E60 M5 (S85) SAL
Advantage: Regardless of the load state of the vehicle, the best possible braking distance is achieved while
driving stability is maintained.
If ABS fails, the EBV function is sustained for as long as possible.
The signals from at least two wheel speed sensors are needed for the EBV function.
Cornering brake control
Cornering Brake Control (CBC) is an extension of ABS. CBC increases driving stability when the brakes are
applied as the car corners ("cornering logic").
Advantage: Optimum driving stability if brakes are partially applied when cornering.
The shift in wheel loads as the car corners (the onset of this phenomenon requires no more than light
application of the brakes) can result in a reduction in handling stability. If required, CBC generates a stabilising
load moment when the brakes are applied lightly outside the ABS intervention range.
Automatic stability control
Automatic stability control (ASC) prevents the wheels spinning during acceleration by intervention in brake and
engine operations.
Advantage: More traction and better driving stability.
If, for example, one of the wheels of the drive axle is on a high-grip surface and the other is on a slippery
surface, the wheel tending to spin is braked. If necessary, the engine's power output is also reduced.
Dynamic traction control
Dynamic traction control (DTC) offers better traction as a trade-off against a reduction in stability in some
circumstances. Consequently, its use should be reserved for exceptional conditions (driving in deep snow, for
example).
The DTC function approximates to that of DSC with a slightly modified control strategy. DTC can be activated by
deactivating DSC (DSC button). DTC intervenes in the braking actions to imitate the function of a conventional
differential lock.
Advantage: Higher traction is available with DTC.
Vehicle stabilisation intervention (e.g. reduced power output) is made slightly later than with DSC.
This enhances traction with a slight loss of driving stability. Occasionally, a compromise is needed between
driving stability and traction.
This is especially true when accelerating and driving uphill on loose surfaces or in deep snow (= friction values
demanding increased slip).
DTC allows DSC to provide a high degree of driving stability while retaining sufficient traction.
Engine drag torque control
The engine drag torque control (MSR) counteracts the tendency of the wheels to lock on smooth surfaces. The
engine's drag torque generated by downshifts or abrupt load changes can lock the driven wheels (especially on
surfaces with a low coefficient of friction).
The wheel speed sensors tell MSR as soon as the wheels are about to lock. MSR then briefly reduces the
engine's drag torque by opening the throttle slightly.
Advantage: The drive wheels retain their lateral stability in overrun mode.
Dynamic brake control
Dynamic brake control (DBC) assists the driver in emergency braking situations by automatically increasing the
brake pressure.
SBT Dynamic Stability Control DSC 8 E60, E61, E63, E64
BMW AG - TIS
23.02.2013 19:56
Issue status (12/2007) Valid only until next DVD is issued
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