BMW F12 2011, Техническое учебное пособие, Страница: 28 / 68

F12�Chassis�Dynamics
4.�Brakes
24
Index Explanation
1 Dynamic�Stability�Control�(DSC)
2 Central�gateway�module�(ZGM)
3 Footwell�module�(FRM)
4 Car�Access�System�(CAS)
5 Instrument�panel�(KOMBI)
6 Parking�brake�button
7 Junction�box�for�the�power�distribution�box
8 Luggage�compartment�power�distribution�box
9 EMF�control�unit
10 EMF�actuator,�rear�left
11 EMF�actuator,�rear�right
12 Wheel�speed�sensor,�rear�left
13 Wheel�speed�sensor,�rear�right
4.2.3.�System�structure
The�EMF�control�unit�receives�the�driver's�command�to�engage�the�parking�brake�through�the�park-
ing�brake�button.�The�vehicle�condition�is�queried/detected�via�the�electrical�system�connection�and
the�bus�systems.�The�control�unit�decides�whether�all�conditions�for�engaging�the�parking�brake�are�in
place.�If�this�is�the�case,�the�two�EMF�actuators�on�the�rear�brake�calipers�are�activated.
4.2.4.�System�function
Due�to�the�spindle's�self-locking�facility,�the�clamping�force�remains�securely�applied�even�when�no
power�supply�is�connected,�and�the�vehicle�is�thus�securely�held.�Once�the�required�force�is�reached,
the�parking�brake�applied�status�is�indicated�by�a�red�indicator�lamp�in�the�instrument�panel�(KOMBI)
and�an�additional�red�LED�in�the�parking�brake�button.