BMW F12 2011, Technical Training Manual, Page: 29 / 68

F12�Chassis�Dynamics
4.�Brakes
25
F12�Design�of�EMF�actuator
Index Explanation
1 Plug�connection
2 Electric�motor
3 Drive�belt
4 Planetary�gears
5 Housing
6 Connection�to�spindle
The�EMF�actuator�is�fixed�to�the�brake�caliper�and�acts�directly�on�the�brake�piston.
The�force�is�transmitted�to�a�two-stage�planetary�gear�system�(4)�by�an�electric�motor�(2)�and�a�belt
drive�system�(3).�The�spindle�illustrated�in�the�graphic�below�is�driven�via�the�connection�to�the�spindle
(6).