GF82.10-P-1002RT Dynamic Curve Illumination, Function

GF82.10-P-1002RT Dynamic curve illumination, function
- with CODE (615) Bi-xenon headlamp unit with integrated curve illumination

General information
The dynamic curve illumination ensures optimum illumination of curves. A conventional bi-xenon headlamp serves as the basis which makes high beam and low beam available. The entire headlamp unit is mounted in a mounting frame so that it pivots horizontally.
The system functions in both low beam and high beam.

Function requirements
^ Circuit 61 ON
^ Rotary light switch (S1) in "low beam" position or
^ Rotary light switch in "Auto" position and the rain/light sensor (B38/2) signals "Darkness"
^ Vehicle moving forward

Function
When steering into a curve, the inside corner headlamp unit swivels in up to max. 15° and the outside corner headlamp also swivels in up to max. 7.5°.
The pivot speed is at least 15 °/s.
When vehicle is stationary, the curve illumination returns to its "zero position".

Curve illumination actuation depends on the following set variables:
^ Steering angle
^ Incline angle
^ Vehicle speed

The direct input parameter is the steering angle, for it describes the driver's direction requirement.
The vehicle speed influences the control response of the swivel angle relative to the steering angle.
Low vehicle speeds require a smaller transformation ratio to prevent the pattern of light from appearing jumpy, e.g. in urban traffic.
At moderate speeds, relatively small changes in steering angle trigger immediate responses.
At higher speeds, the system responses are transformed into larger movements.
The damping and reinforcement of the system are continuous and not based on specific thresholds to ensure a more rapid return movement when exiting the curve.
A range with lower sensitivity and greater damping is provided (approx.± 6° steering angle) to compensate for the natural weaving of the vehicle when traveling straight ahead.

Actuation (up to 8.7.07)
The headlamp range adjustment control unit (N71) actuates via the HRA [LWR] power module (E1n3) the left dynamic curve illumination motor (E1m2) and over the HRA [LWR] power module (E2n3) the right dynamic curve illumination motor (E2m2). Faults that occur, such as short circuits or discontinuities, are reported back to the headlamp range adjustment control unit.

As of 9.7.07 the dynamic curve illumination is controlled by the xenon headlamp control unit (E1n1) and by the xenon headlamp control unit (E2n1).

Actuation (as of 9.7.07)
The xenon headlamp control unit actuates the left dynamic curve illumination motor and the xenon headlamp control unit actuates the right dynamic curve illumination motor.
Faults that occur, such as short circuits or discontinuities, are detected by the xenon headlamp control units and stored in the fault memory for the corresponding xenon headlamp control unit.

If the dynamic curve illumination is faulty, an error message is displayed in the multifunction display (A1p13) of the instrument cluster (A1).