ADVISORY NOTE ON HEADLAMP ELECTRICAL SYSTEM PERFORMANCE

A statistical sampling was made of the voltage across vehicle headlamp terminals at engine speeds of 1000, 1500 and 2000 r.p.m. The averages for the fifty-car sample were 11.66 volts when all accessories were switched on, and 12.75 volts when all accessories were switched off. The variation in seeing distance corresponding to the measured voltage deviations can be upwards of 100 feet. This suggests that regulatory authorities should examine the technology achievements in headlamp electrical systems to determine whether the voltage regulation can be improved and how the operational deviations might be catered for in headlamp performance evaluations and type comparisons.

  • Corporate Authors:

    NATIONAL AERONAUTICAL ESTABLISHMENT

    OTTAWA,   Canada 
  • Authors:
    • Blais, R
    • Pinkney, HFL
    • Hall, A H
  • Publication Date: 1974-9

Media Info

  • Features: Figures; Tables;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264344
  • Record Type: Publication
  • Report/Paper Numbers: LTR-ST. 730
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM