BMW F97, Техническое учебное пособие

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F97/F98�Complete�Vehicle
5.�Chassis�and�Suspension
60
The�sensors�in�the�vehicle�permanently�measure:
• The�body�and�vertical�acceleration
• The�current�lateral�and�longitudinal�acceleration
• The�vehicle�speed
• The�steering�wheel�position.
Based�on�this�measured�data,�the�M�VDP�control�unit�calculates�the�control�commands�to�be�sent
to�the�electromagnetic�valves�in�the�shock�absorbers�for�each�individual�wheel�according�to�the�road
profile�and�driving�situation.�This�means�that�the�damping�forces�will�always�be�applied�according�to
requirements.
This�improves�ride�comfort�and�also�increases�driving�dynamics.
This�improves�the�vehicle's:
• Suitability�for�long-distance�journeys
• Enhanced�body�stability�and�agility
• Improves�driving�safety�by�minimizing�wheel�load�fluctuations
and�reducing�the�stopping�distance.
Adaptive�suspension�(EDC)�button�options
The�EDC�button�is�connected�with�the�Body�Domain�Controller�(BDC)�via�the�LIN�bus.�The�Body
Domain�Controller�(BDC)�forwards�this�information�via�the�FlexRay�bus�to�M�VDP.
The�Dynamic�Damper�Control�on�the�F97/F98�offers�the�options�"Comfort",�"Sport"�and�"Sport+".
All�three�programs�feature�M�dynamic�control�on�the�F97/F98.
Note:
In�the�first�E92/E90�M3�models,�the�EDC�had�the�three�options,�"Comfort",�"Normal"�and�"Sport",
whereby�with�the�"Sport"�option�there�is�no�M�dynamic�control,�but�the�dampers�are�set�very�hard.
This�is�primarily�suited�for�a�cone�slalom�on�an�even�surface.�However,�the�fastest�possible�times�on
normal�roads�cannot�be�achieved�with�the�"Sport"�option.�The�E93�M3�was�dynamically�controlled�in
"Sport"�mode�on�standard�production�models�upwards,�and�all�succeeding�models�including�the�F97/
F98�are�dynamically�controlled�in�"Sport+"�mode.