THE GENERAL MOTORS HYDRAULIC-PNEUMATIC ENERGY ABSORBER APPLIED TO 1974 BUMPER SYSTEMS

A stipulation of the 1974 Federal Motor Vehicle Safety Standard (FMVSS) 215 is that no portion of the test vehicle is permitted to contact planes A or B of the test pendulum. One situation in which the bumper could contact plane B, and therefore fail the test, occurs while the bumper and pendulum are separating after impact. This report presents the technical procedure used to establish energy absorber rebound performance characteristics and the modifications made to the General Motors hydraulic-pneumatic design to obtain rebound control on certain 1974 car models. Tests were conducted and load values on the hitch ball and energy absorbers for various trailer weights, road conditions, and speeds are presented.

  • Corporate Authors:

    Society of Automotive Engineers

    485 Lexington Avenue
    New York, NY  United States  10017
  • Authors:
    • Kerr, L L
  • Publication Date: 1974-3-1

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264213
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 740061
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM