GF82.10-P-2007-01T Xenon Headlamp, Function

GF82.10-P-2007-01T Xenon Headlamp, Function
- with CODE (614) Bi-xenon headlamp unit
- with CODE (615) Bi-xenon headlamp unit with integrated curve illumination


When the low beam lamps are switched on, the xenon headlamp supply module (E1n4 and E2n4) activates the xenon headlamp ignition module (E1n2 and E2n2) via the control voltage within a few milliseconds.

A high-voltage surge from the ignition device ignites the xenon lamps, and in doing so an electric arc is formed between the electrodes. If an electric arc of sufficient stability is detected, the control electronics of xenon headlamp supply module (E1n4) and xenon headlamp supply module (E2n4) switch to power-output limitation mode.

With the bi-xenon headlamps the light generated in the previous manner in a gas discharge lamp (D2S lamp), travels directly through the optical system without being reflected For the low beam the bottom half of the light beam is covered by a shield. This prevents oncoming traffic from being dazzled. When switching over to high beams the shield is pivoted away downwards so that the entire light beam is available.

Actuation of the covering is done electromechanically via the left high beam solenoid (E1/1) and the right high beam solenoid (E2/1). In order to shape the extremely bright light to make it more acceptable to other road users, the lens aperture area with its dotted characteristic is optically enlarged.
This is possible on account of the specially formed areas which surround the lens. Additionally, the light can trickle through several chrome-plated strips at the rear.
A portion of the diffused light is intercepted by the lower section of the surface area and reflected to the upper section of the chrome- plated longitudinal strips.

Xenon lamp technology means that the startup characteristic is delayed. After switching on, 50 % of the brightness is achieved within 1 to 2 seconds and the full brightness is achieved after approx. 30 seconds.