BMW F48 - Page 71

F48�General�Vehicle�Electronics
6.�Locking�and�Security�Functions
67
F48�sensors�for�non-contact�tailgate�opening
Index Explanation
1 Tailgate�lock
2 Comfort�Access�antenna,�bumper,�rear
3 Evaluation�electronics�for�non-contact�tailgate�opening
4 Sensor�at�top�for�non-contact�tailgate�opening
5 Sensor�at�bottom�for�non-contact�tailgate�opening
The�two�sensors�are�connected�to�the�evaluation�electronics�and�constantly�measure�the�capacity.
A�comparison�of�the�time�characteristic�of�the�measured�capacities�permits�the�identification�of�a
certain�movement�pattern.
A�targeted�foot�movement�to�and�from�the�bumper�can�be�detected�herefrom.�The�top�sensor�detects
the�shin,�the�bottom�sensor�the�toes.
The�detection�range�is�between�the�rear�lights.
The�sensors�are�secured�in�the�inside�of�the�rear�bumper.
The�evaluation�electronics�evaluate�the�signals�from�the�sensors�and�make�this�information�available
to�the�BDC�via�the�local�interconnect�network�bus.�If�there�is�a�valid�ID�transmitter�near�the�Comfort
Access�antenna�in�the�rear�bumper,�the�BDC�initiates�an�opening�of�the�tailgate.
The�tailgate�opens�regardless�if�it�was�locked�or�unlocked.
The�tailgate�of�the�F48�can�also�be�closed�again�using�the�same�foot�movement�as�for�opening.
With�the�closing�of�the�tailgate�via�the�non-contact�tailgate�activation,�a�sound�is�output�by�an�acoustic
warning�device,�which�is�installed�in�the�tailgate.