BMW F97 Technical Training Manual page 64

F97/F98￿Complete￿Vehicle
5.￿Chassis￿and￿Suspension
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.
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