• Title/Summary/Keyword: Dipped beam

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An Experimental Study on the Lens Surface Temperature Distribution of P/C Headlamp Using the Three Category of H4 Halogen Bulbs (PIC 렌즈 전조등 렌즈면의 온도분포에 관한 실험적 연구)

  • 박경석;강병도
    • Transactions of the Korean Society of Automotive Engineers
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    • v.10 no.4
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    • pp.158-165
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    • 2002
  • This Paper deals with the headlamp lens surface temperature distribution of p/c headlamp using the three categories of H4 halogen bulbs. Glass is gradually replaced by P/C for the lens material off vehicle headlamp due to the weight reduction and stream lined body of a vehicle. With this trend, the newly established standards for a headlamp with a P/C lens in Europe requires that the heat generated by a bulb should not distort the lens surface. Also the requirements fur the bulb of a headlamp are being enforced in U.S.A & Europe. However, such requirements are not established yet in Korea. By using three kinds (60/55w, 100/90w, 130/90w) of H4 halogen bulbs in this experiment, the surface temperature distribution and Max. temperature on the lens were measured. The results of this study implies the necessity of requirement fur the bulb off headlamp.

Analysis of the Irradiation Distance of Dipped-beam Headlamps Using Computer Simulation (컴퓨터 시뮬레이션을 이용한 변환빔 전조등 조사거리에 관한 연구)

  • Cho, Hyun Yul;Lee, Ho Sang;Yong, Boojoong;Woo, Hyun Gu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.4
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    • pp.159-165
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    • 2013
  • One of the leading causes of night time automobile accidents is the darkness of surroundings. Headlamps play a critical role in casting light and providing drivers with visibility. Headlamp design and new technology have been developed recently as research has been actively carried out to increase headlamp recognition. This study statistically analyzes irradiation distance using computer simulation by categorizing headlamps applied in domestic automobiles in the last decade by year, light source, form, vehicle type, and height of installation. After analyzing results of irradiation distance, it appears irradiation distance has been increased by approximately 10m in the last decade. This increase in irradiation distance is predicted to decrease night time accidents by allowing more time to recognize potential causes of accidents.