Xenon Headlamp, Position/Function

Xenon Headlamp, Position/Function






The bi-xenon light technology is located in the outer headlamps.

When the low beam lamps are switched on the xenon headlamp control module (E1n1, E2n1) activates the xenon headlamp control module and ignition module (E1n2, E2n2) via the control voltage within a few milliseconds.

A high voltage surge from the ignition device actuates the xenon lamp by striking an arc between electrodes. If an electric arc of sufficient stability is detected the control circuit switches the control modules (E1n1, E2n1) over to power-limiting 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

A voltage converter generates the required voltage for the reliable function of the xenon headlamp.

NOTE: For technical reasons the xenon lamp has a timed startup characteristic. After switch on, 50 % of the luminosity is reached within 1 to 2 seconds and full luminosity is achieved after another approx. 30 seconds.

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.

The shield is controlled electro-mechanically by the solenoids in the right and left high beams (E1/1, E2/1).

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 accomplished by specially designed surfaces around the lens. In addition the light can enter from the rear between several chromated strips. 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.