5 Series E60 M5 (S85) SAL
Just before the vehicle reaches a standstill, the SMG will shift into 1st gear and open the clutch. The
transmission of power between the engine and transmission is broken.
Gearshifts that would result in an excessively high or low engine speed are suppressed.
Driving in gear lever position "D" (automatic mode)
•
Constant-speed travel
Continuous changes of the accelerator pedal position (opening and closing the throttle) are registered in the
SMG control unit. The SMG control unit then suppresses a pendulum shift between adjacent gears (up and
down, e.g. on a motorway with constantly changing speed).
•
Upshift suppression
Based on the accelerator pedal position, the SMG control unit recognises when the throttle is closed rapidly,
e.g. before applying the brake.
The SMG control unit suppresses the upshift. This ensures that the engine braking effect is retained and
supports the braking action.
•
Driving uphill
The SMG control unit recognises when the vehicle is driving uphill from the data from the wheel speed
sensors and the accelerator pedal position, and then prevents unnecessary upshifts and irritating pendulum
shifts (e.g. at constantly high engine speed and foot taken off the accelerator pedal).
•
Driving downhill
The SMG control unit recognises when the vehicle is driving uphill from the data from the throttle valve
potentiometer (load signal), wheel speed sensors (road speed) and the brake light switch. To maintain and
increase the engine's braking effect, the SMG control unit will shift down a gear as road speed increases.
•
Braking deceleration and automatic downshift
The SMG control unit recognises braking deceleration from the brake light switch, the wheel speed sensors
and the accelerator pedal position.
The SMG control unit shifts down according to road speed to maintain the engine's braking effect. As this
happens, several gears may be skipped. The correct gear is automatically selected when the vehicle
accelerates again.
•
Manual intervention in automatic operation
When the gear lever or the gearshift paddles are operated in automatic mode, the system will automatically
change to manual mode.
Automatic mode must be selected again.
Launch control (acceleration assist system)
Preconditions for launch control:
•
High-grip road surface
•
Dynamic Stability Control (DSC) deactivated (DSC button pressed for longer than 3 seconds)
•
SPORT button pressed
The launch control enables optimum vehicle acceleration from standstill on a motor sports level.
Upshifts are automatic even in manual mode when the launch control is active. This prevents the engine from
reaching critical speeds.
Deactivate launch control:
•
By the position of the accelerator pedal (releasing the kickdown position)
SBT Sequential manual gearbox E60, E61, E63, E64
BMW AG - TIS
23.02.2013 19:42
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 6 -
