DETERMINATION OF EFFECTIVE ROLLING RESISTANCE BY COASTDOWN EXPERIMENTS ON SMOOTH AND ROUGH ROADS

Coastdown experiments on rough roads, when compared with coastdown records for the same vehicle on a smooth level road, allow the determination of road resistance increase due to roughness. Laboratory tests are required to establish the velocity dependency of the tire rolling resistance for smooth surfaces. With this information available, the method of parameter identification by optimization can be used effectively to extract reasonably accurate results for drag coefficients and rolling resistance for smooth and rough roads. Data acquisition and data processing procedures -- which are strongly computer oriented are described. A brief account is given of computer simulation results of vehicle-obstacle encounters by means of a four-degree of freedom energy-dissipative dynamic model.

  • Supplemental Notes:
    • This paper was presented at the Tire Rolling Losses and Fuel Economy Workshop, Transportation System Center, Cambridge, Masschusetts, October 18-20, 1977.
  • Corporate Authors:

    Society of Automotive Engineers

    2100 West Big Beaver Street
    Troy, MI  United States  48084
  • Authors:
    • Korst, H H
    • Funfsinn, M A
  • Publication Date: 0

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Filing Info

  • Accession Number: 00178829
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM