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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Horizontal Adjusting Control for Automotive Headlight System


    Additional title:

    Sae Technical Papers


    Contributors:
    Shiao, Yaojung (author) / Ou, Yu-Jia (author)

    Conference:

    SAE World Congress & Exhibition ; 2007



    Publication date :

    2007-04-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Horizontal Adjusting Control for Automotive Headlight System

    Shiao, Y. / Ou, Y.-J. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Horizontal adjusting control for automotive headlight systems

    Shiao,Y. / Ou,Y.J. / Nat.Taipei Univ.of Technol.,TW | Automotive engineering | 2007


    2007-01-0610 Horizontal Adjusting Control for Automotive Headlight System

    Shiao, Y. / Ou, Y.-J. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Headlight adjusting system comprising gyroscopes

    LANG ANDREAS / HAGENREINER THOMAS | European Patent Office | 2020

    Free access

    LOW-GLARE AUTOMOTIVE HEADLIGHT

    TOYOOKA KAZUHIKO | European Patent Office | 2019

    Free access