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

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



The bi-xenon light technology is located in the outer headlamps. When low beam is switched on, the xenon headlamp control unit (E1n1) and the xenon headlamp control unit (E2n1) activate the xenon headlamp ignition module (E1n2) and the xenon headlamp ignition module (E2n2) via the control voltage within a few milliseconds. The bi-xenon bulb is ignited via a high-voltage surge from the ignition modules. A light arc is formed between the electrodes in this case. If a sufficiently stable light arc is detected, the xenon headlamp control unit (E1n1) and xenon headlamp control unit (E2n1) control electronics switch to output-limiting mode. With the bi-xenon headlamps, the light generated in the previous manner in a gas discharge lamp travels directly through the optical system without being reflected. A voltage converter generates the required voltage for the reliable function of the bi-xenon lamp.

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 beam, the shield is pivoted away downwards so that the entire light beam is available. The shield is actuated electromechanically via the left high beam solenoid (E1l1) and the right high beam solenoid (E2l1). In order to make the extremely bright light 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.

For technical reasons, the bi-xenon lamps have a timed startup characteristic. After switching on, 50 % of the brightness is achieved within 1 to 2 seconds and the full brightness is achieved after approx. 30 seconds.