9415 Headlights · Xenon main headlights

911 Electrical system 9 9415 Headlights Xenon main headlights Additional equipment (I-no.) for all models instead of the previously known "Litronic", is now the new gas discharge light system known as "Bi-Xenon", which, in terms of range and road surface illumination, is adapted to the superior performance. In technical terms these headlamps are ba- sically the same as the standard headlamps of the 911 Turbo, the only difference being an ad- ditional grooving in the protective glass 9_01_00 (same as halogen basic headlamps) The mechanical concept of the beam maskNote is based on an electronically actuated sole- Technically speaking, there is no difference noid which moves the beam mask to the between "Litronic" and "Xenon". Both systems high-beam position when the high-beam are based on the principle of the gas- signal is issued. discharge lamp. Trademark protection of When the high-beam headlight is switched different manufacturers accounts for the off, the moving beam mask is raised to the different system names. The name "Bi- low-beam position and held there by a pre- Xenon" is a reference to the fact that gas- tensioned spring so that the specified discharge lamp technology is also used in light/dark boundary is maintained reliably the high-beam headlights. Unlike the "Bi- even in the event of a system failure. Xenon" system, the "Litronic" system uses a conventional halogen lamp for the high- beam headlight. With the Bi-Xenon projection module, the light generated by the D2S xenon lamp is projected onto the road surface by means of a large glass lens measuring 70 mm in di- ameter. By moving a beam mask, the beam exit area can be enlarged compared to that for the low-beam headlight so that the xenon light (similar to normal daylight) can also be used to produce the spread beam of the high-beam headlight. 9_02_00 A – High beam B – Low beam 2002 Service Information 9 - 19