BMW F97 - Page 59

F97/F98�Complete�Vehicle
5.�Chassis�and�Suspension
55
Optional�equipment
Designation F97/F98
LM�EH2+�wheel�rims�(forged)�styling�765M 9.5J�x�21
LM�EH2+�wheel�rims,�rear�(forged)�styling�765M 10J�x�21
Color Bi-color
Orbit�grey
Front�tires 255/40�R21
Rear�tires 265/40�R21
RSC�tires�with
emergency�running�properties
No
Factory�equipment
The�components�of�the�above-listed�wheel/tire�combinations�have�been�developed�specially�for�the
F97/F98.�This�can�be�recognized�by�the�star�on�the�outer�side�of�the�tire,�among�other�things.
Other�combinations�may�have�a�negative�effect�on�the�performance�and�the�driveability�of�the�F97/F98
and�lead�to�forfeiture�of�the�operating�licence�with�forfeiture�of�the�insurance�cover.
5.4.�Driving�dynamics�systems
The�M-specific�coordination�of�the�driving�dynamics�(longitudinal,�transverse�and�vertical)�was
effected�on�the�Nürburgring�Nordschleife.�The�main�criteria�were�handling�and�the�lap�times.
5.4.1.�Vertical�Dynamics�Management
The�EDC�function�integrated�in�the�M�vertical�dynamic�platform�(M�VDP)�controls�the�adjustable
dampers.
The�drivability�can�be�shifted�toward�the�individual�driving�dynamics�direction�via�the�EDC�button
in�the�M�drive�dynamic�control�switch�on�the�center�console.�The�program�selection�can�also�be
preconfigured�in�the�head�unit�HU�and�selected�using�the�corresponding�M1/M2�buttons�on�the
steering�wheel.
Adaptive�M�suspension�on�Competition�model�(Dynamic�Damper�Control)
There�are�no�EDC�control�valves�as�familiar�from�the�G01/G02�fitted�on�the�outside�of�the�shock
absorbers�but�instead�typical�M-only�internal�control�valves.�The�shock�absorbers�have�been
developed�with�the�supplier�ZF�Sachs�and�the�system�adapted�to�the�F97/F98.
The�EDC�works�with�infinitely�variable�valves�in�the�absorbers.�The�hydraulic�oil�flow�is�controlled
via�electromagnetic�control�valves.�It�is�thus�possible�to�make�available�the�damping�force�actually
required�at�all�times.�The�infinitely�variable�control�principle�was�introduced�for�the�first�time�in�the�E65
and�has�consistently�been�further�developed.