Vehicle Loading Conditions’ Influence Over Front Lighting Requirements and Dipped Beam Vertical Leveling Control Method

Abstract

This study evaluates the effects of the vehicle body inclination changes on the cut-off (the transition between the lighter and darker portions of the beam) vertical position of dipped beam which is one of the main functions of the headlamp. The functionality of headlamp vertical aiming system and its importance for the driving safety are examined. In case of any change on the vehicle, which effects to the vehicle inclination values, a control method is defined in order to check suitability of cut-off vertical position for every loading conditions defined by regulations. In addition, the calculations are formulated to find required vertical aiming values in order to keep the cut-off position in the range of minimum to maximum values defined by the regulations are formulated.

It is concluded that after heavy accessory/configuration changes, major modifications, or new version of model aplications on the vehicle make necessary to be checked availability of actual cut-off vertical positions and output values of the headlamp aiming software. In case of aiming software update necessities, new values based on regulated loading conditions can be defined by following formulations.

Keywords

• Automotive,Loading Conditions,Vehicle Inclination,Headlamp,Leveling

References

1. [1] M. S. V. R. Tom K. Philip, «DESIGN OF AN AUTOMOTIVE HEADLAMP CONSIDERING STYLE AND PERFOMANCE,» SASTECH Journal, cilt 12, no. 2, 2013.
2. [2] United Nations Economic Commission for Europe Vehicle Regulations, Reg. 48 - Rev.7.
3. [3] Chung-YuTsai, «Design offree-formreflectorforvehicleLEDlow-beamheadlamp,» Optics Communications, 2016.
4. [4] T. Targosinski, «IMPORTANCE OF CUT-OFF LINE,» Journal of KONES Powertrain and Transport, cilt 19, no. 3, 2012.
5. [5] United Nations Economic Commission for Europe Vehicle Regulations, Reg. 112 - Rev.2.
6. [6] «HOT ROD Hotline,» [Çevrimiçi]. Available: https://www.hotrodhotline.com/headlights-part-2-lowhigh-beams.
7. [7] F. C. Automobiles, EGEA User Manual, 2016.
8. [8] Official Journal of the European Union - Directive 2007/46/EC.