The author examines the two functions of the shock absorber: to control the movements of the car body and to limit the movement of the wheels which governs the adhesion between tyres and road surface. Vehicle suspensions determine the stability and enduring quality of a vehicle and also the tyre adhesion, and efficient suspensions depend on the quality of the shock absorber. Checks for shock absorber wear are described and thus stated that these should be carried out at the resonant frequency of the wheel and tyre system. Results of tests performed an in-service vehicles have to be correlated with those on vehicles known to be in good condition. It is pointed out that temperature has a great effect on shock absorber performance. The author concludes that although existing checks show the variation between new and worn shock absorbers, they cannot judge whether suspension damping is accurate from the safety angle, and there is a need for a check which provided an objective evaluation of a safety criterion. This article was originally published in French in "Ingeniseurs de L' Automobile", October 1973. /TRRL/

  • Corporate Authors:

    Motor Industry Research Association

    Watling Street
    Nuneaton CV10 0TU, Warwickshire,   England 
  • Authors:
    • Avner, M D
  • Publication Date: 1975

Media Info

  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127922
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: R&D Rept.
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1975 12:00AM