The Advanced Adaptive Frontlighting System (AAFS) described in the paper represents a front lighting system consisting of four halogen projector units, two at each side of the vehicle. One pair of projectors may be horizontally static and the second pair, with capability for horizontal movement, can be bi-functional with a driving/dipped beam, providing a dynamic bending/swiveling function. This horizontally moveable pair of lamps also provides a dipped beam sliding function whereby the horizontal position of the projector axes vary in relation to the vehicle speed. For low speed, the axes are divergent for better curve illumination. The beams provide wide side beam spread and have a lower concentration of light flux in the own road lane. For high vehicle speed, for example, on a motorway, the beam axes are parallel so that the light is concentrated toward the central road space and side beam spread is reduced. The projector axes can be parallel for driving beam operation with or without the dynamic bending. The variation in horizontal position can be continuous or discrete and can also be combined with a vertical shift of the projectors for high vehicle speed. An advantage of the above mentioned headlight system for motor vehicles is in its high adaptability. Variability of the dipped beam spread light in relation to speed and vehicle direction results in a significant change in road luminance, especially at higher distances. This dipped beam adaptation is effective even with straight roads. Swiveling during driving on winding roads additively modulates the basic movement of the sliding dipped beam lights. The main beam lights are maintained at nominal aim to maximize their range. The AAFS system was implemented and tested on a Skoda Octavia A4 test car. The performance was confimed as comparable with a HID system.
Advanced adaptive frontlighting system
Fortschrittliche adaptive Scheinwerfersysteme
2005
10 Seiten, 10 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Englisch
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