LR3/Disco 3
The AFS is a new system to improve driver visibility under differing driving conditions. AFS provides a larger visible area
which is illuminated when cornering by adjusting the position of the beam distribution on the road. Horizontal adjustment
is made automatically to the most suitable orientation for the driving conditions using steering angle and information from
other vehicle sensors.
AFS is only available with xenon headlamps and also includes the dynamic headlamp levelling system described in the
'Headlamp Levelling' section of this document. The bi-xenon module within the headlamp is controlled by actuator motors
which rotate the projector module on its vertical and horizontal axes to adjust the beam output to suit the cornering
conditions and vehicle inclination. Only the bi-xenon lamp projector module swivels, the halogen high beam lamp unit
remains static.
The AFS system is controlled by an AFS control module which is located at the bottom of the 'A' pillar, behind the CJB.
The control module controls the vertical and horizontal alignment of the xenon projector module and the operation of the
static bending lamp which is requested by the AFS control module but controlled by the CJB.
AFS Concept
AFS Control Module
The AFS control module is a dual functionality unit which also incorporates software to control the dynamic headlamp
levelling. The AFS control module is connected to the high speed CAN bus and receives inputs from other vehicle
systems on the status of the following parameters:
1
-
Locking plate
2
-
Turn signal lamp
3
-
Side marker lamp (NAS only)
4
-
Side lamp
5
-
Static bending lamp (All except NAS)
6
-
Xenon low/high beam AFS lamp
7
-
Halogen high beam lamp
8
-
High beam lamp access cover
9
-
Xenon control module
10
-
Low/high beam lamp access cover
11
-
Side lamp and static bending lamp access cover (hidden)
12
-
Turn signal lamp access cover (hidden)
A Conventional headlamp beam distribution
B AFS swivel headlamp beam distribution
