Xenon headlamps position/function - GF82.10-P-2001B
MODEL 215
The headlamps in model 215 differ from the previous xenon headlamps on account of their entirely new lighting technology development, which the xenon light uses for low and high beam lights.
The new lighting technology known as Bi-Xenon 70 , 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 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 circuit switches the control modules (E1n1, E2n1) over to power-limiting mode.
The light that was generated up until now in a gas-discharge lamp (D2S lamp) is not reflected in a bi-xenon 70-headlamp, but sent directly through a lens with a diameter of 70 mm.
A voltage transformer generates the voltage required for reliable xenon lamp operation.
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.
The entire luminous flux is made available for the high-beam lights. When switching over to low-beam operation a screen is moved into position between the gas-discharge lamp and the lens, which covers up the luminous flux directed into the distance and thus helps to prevent oncoming traffic from being dazzled.
The screen (B) is controlled electro-mechanically by means of a magnetizing coil (M).
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.
| Xenon headlamp control module, position/task | GF82.10-P-2104A | ||
| Xenon headlamp ignition device, position/task | GF82.10-P-2105A |