Correct adjustment of the wheel suspension geometry in relation to the axles of the vehicle is of great importance and should be checked as part of the routine testing of vehicles in accordance with paragraph 29 of the German highway code. A differentiated analysis of toe-in and camber is too comprehensive for this. Therefore the so-called wheel course is determined and evaluated as a summary characteristic value. However, the reliability of the wheel course testers used by the TUEV has never been subjected to a detailed check. The following problem areas were examined: the measuring principle on which the instrument is based (power or path measurement); the effect of vehicle parameters (type of tyre, loading of the vehicle) on the result of the measurement; effect of factors specific to the instrument on the result. A model was built for clarifying the effect of the possible parameters of the result of the measurement. This was followed by practical tests with vehicles of different design and having different wheel adjustment on a number of test rigs. The results obtained from the theoretical and practical tests have shown that, other conditions being equal, power and path measurements provide results which are sometimes difficult to compare; since with power measurement on one axle the results are also affected by geometric errors on the other axle, preference should be given to path measurement. (TRRL)

  • Availability:
  • Supplemental Notes:
    • International Conference on Road Traffic Safety 1978.
  • Corporate Authors:

    Road Safety Study and Research Fund, Belgium

    Chaussee de Haecht 1405
    1000 Brussels,   Belgium 
  • Authors:
    • Ewald, W
  • Publication Date: 0


  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00317124
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Apr 15 1981 12:00AM