This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Photometrical Measurements of Headlamps Exposed to Standard and Natural Dirt - Efficacy of Headlamp Cleaning Systems
Technical Paper
2010-01-0125
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Along with the introduction of HID-headlamps and a luminous flux beyond 2000 lm the regulations concerning automatic levelling and headlamp cleaning systems were enacted. This reply regarding the position, HID-headlamps would produce a higher glare-illuminance, was only partly accepted. While levelling systems are well established, headlamp cleaning systems are challenged for economical and ecological reasons.
The proposed paper will deal with the different aspects of soiling. Because standard dirt as defined in ECE R-1 is not representative for any dirt from the street, the efficacy of HCS on different kinds of dirt are analyzed. Initially 22 headlamps from H4 to HID have been systematically soiled with standard dirt, then the ECE-points and the luminance distribution have been measured. The maximum increase of the glare illuminances should highlight the moment where cleaning could have its most valuable benefit and what the minimal effects of cleaning should be. Furthermore standard-soiled headlamps have been system-cleaned at different degrees of soiling and the efficacy of the HCS is compared with the efficacy on street-dirt of comparable levels collected on the same headlamps. Since natural dirt consists of different components dependent on weather and street conditions, different degrees of efficacy are expected.
This study merges and consolidates most of the previous researches regarding soiling and headlamp cleaning systems. Hence it could be a valuable contribution to the ongoing and upcoming discussions related to HCS.
Recommended Content
Ground Vehicle Standard | Motorcycle Headlamps |
Technical Paper | Operator's Enclosures |
Technical Paper | Advanced Optical Films for Automotive Displays |
Authors
Citation
Soellner, S., Haferkemper, N., Weibel, T., and Khanh, T., "Photometrical Measurements of Headlamps Exposed to Standard and Natural Dirt - Efficacy of Headlamp Cleaning Systems," SAE Technical Paper 2010-01-0125, 2010, https://doi.org/10.4271/2010-01-0125.Also In
Automotive Lighting Technology and Human Factors in Driver Vision and Lighting, 2010
Number: SP-2266; Published: 2010-04-13
Number: SP-2266; Published: 2010-04-13
References
- Alferdinck J.W.A.M. Padmos P. Car headlamps: Influence of dirt, age and poor aim on glare and illumination intensities Lighting Res. Technol. 20 195 198 SAGE Publications 1988
- Bahnmüller; G. Progress in development of headlamp cleaning systems PAL proceedings 1997 43 48 Fachgebiet Lichttechnik TU Darmstadt 1997
- Flannagan M.J. Sivak M. Schoettle B. Benefits of Headlamp Leveling and Cleaning for Current U.S. Low Beams University of Michigan Ann Arbor Transportation Research Institute 2007
- Orth P. Headlamp Cleaning Systems; PAL proceedings 1995 136 140 Fachgebiet Lichttechnik TU Darmstadt 1995
- Rumar K. Dirty Headlights - Frequency and Visibility Effects; Ergonomics 17 4 529 533 1974
- Schmidt-Clausen H.-J. Improvement of the Low Beam Pattern by Leveling Systems and Headlamp Cleaning Systems; PAL proceedings 1995 178 184 Fachgebiet Lichttechnik TU Darmstadt 1995
- Schmidt-Clausen H.-J. Evaluation of the cutoff referring to quality, location and linearity PAL proceedings 1995 171 177 Fachgebiet Lichttechnik TU Darmstadt 1995
- Sivak M. Flannagan M.J. Traube E.C. Kojima S. Aoki M. Low-beam headlamps: Effects of realistic levels of dirt on light output Lighting Res. Technol. 29 15 22 SAGE Publications 1997
- UNECE Agreement concerning motor vehicle and parts: Regulation 1: conventional headlamps 1960 Regulation 45: headlamp cleaners 1988 Regulation 48: installation of lighting 1995 Regulation 98: gas-discharge light sources 1996 Geneva