The program determined the effects of selected modes of disc- and drum-brake component degradation on vehicle braking performance. The results are used to recommend brake-component and system-performance limits of degradation. In this program an inertial brake dynamometer was used to evaluate physically the effects of thin friction materials, friction-material wear characteristics, effects of friction material contamination, and the effects of heat spots, rotor scoring, out-of-round drums and disc lateral runout. Also physically evaluated were sticky wheel cylinders. The other major tasks were the evaluation of side-to-side brake imbalance with vehicle-handling models and vehicle test conducted with sample drivers and the analytical determination of inspection criteria for brake system proporting (front-to-rear ratio) and brake pedal reserve. /NTIS/

  • Supplemental Notes:
    • See also PB-219 378, PB-219 379, PB-219 380, and PB-225 247.
  • Corporate Authors:

    Bendix Corporation

    20800 Ten and One-Half Mile Road
    Southfield, MI  United States  48076

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • KERANEN, T W
    • Schwartz, H W
    • Facko, M J
    • Tarr, W R
    • Leung, C K
  • Publication Date: 1974-11

Media Info

  • Pagination: 22 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00082927
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: BRL/TR-74-7178 Summ Rpt.
  • Contract Numbers: DOT-HS-090-3-710
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 26 1975 12:00AM