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Horizontal Adjusting Control for Automotive Headlight System
Technical Paper
2007-01-0610
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A well-designed headlamp system should allow enough illumination to road conditions and less glare to an oncoming vehicle for night-time driving or in darkness. However, loads and body motions of a running vehicle can affect the beam direction of a headlamp. Besides, car braking and acceleration also cause vehicle pitching and then change beam direction. Change of beam direction due to the above factors results in insufficient illumination in front of a car and glaring to the oncoming vehicles. To solve the above problems, one solution is to equip a vehicle with a horizontal adjustable headlight system for night-time driving or in darkness. However, some road conditions, such as speed breaker or pavement with pot-hole, can cause high frequency vehicle vibrations, which will cause high frequency headlight adjustments if the headlamp is adjustable. These unnecessary high-frequency adjustments might also cause safety problems to drivers. To solve the dilemma, this paper simulated several vehicle motions under different road conditions for different vehicle speeds. Results showed that an active horizontal adjustable headlight system should not respond to some road conditions which cause high frequency vehicle motions. A low-pass filter was proposed for headlight control system to keep the headlight horizontal adjustment appropriate under different driving conditions.
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Authors
Citation
Shiao, Y. and Ou, Y., "Horizontal Adjusting Control for Automotive Headlight System," SAE Technical Paper 2007-01-0610, 2007, https://doi.org/10.4271/2007-01-0610.Also In
Automotive Lighting Technology and Human Factors in Driver Vision and Lighting
Number: SP-2106; Published: 2007-04-16
Number: SP-2106; Published: 2007-04-16
References
- Neumann R. “System Integration in Automotive Lighting Improvements in Visibility at Night ” SAE Technical Paper Series 2002-01-1989
- Kalze F-J “ Xenon Light for Main and Dipped Beam ” SAE Technical Paper Series 980005
- Shiao Y. Chen L. Sun C. “ Study of an Adaptive Frontlight System ” proceedings of 21th CSME conference Taiwan Nov 2004
- Shiao Y. Lin C. “ The Dynamic Vertical Aim Control for an Adaptive Motorcycle headlight ” proceedings of 22th CSME conference Taiwan Nov 2005
- Okawa M. “ The Development of Visibility Evaluation Method for Automotive Headlamps in Motion ” SAE Technical Paper Series 2003-01-0928
- Neumann R. “ AFS Halogen Headlamp System Experimental Study and First Field Results ” SAE Technical Paper Series 2004-01-0439
- Hamm M. Lampen M. “ Safety and Comfort: Advanced Methods to Analyze Headlamp Light Performance ” SAE Technical Paper Series 2000-01-0320
- Hamm M. Rosenhahn E-O “ Facts and Feelings Regarding Motorway Light in Adaptive Headlamp Systems ” SAE Technical Paper Series 2003-01-0552
- Adams/Car User Manual.
- ECE Rev.2/Add.111 Regulation No. 112, page14.