TIRE/ROAD NOISE TRAILER MEASUREMENTS WITH THE CLOSE-PROXIMITY METHOD UNDER VARIATION OF ACCELERATING AND BRAKING TORQUE

On a roller bench tire dimensions of a wide range can be examined on the same tool, suspension characteristics like camber, slip angle, wheel load, etc., can easily be varied and the surrounding conditions can be well-controlled. As a disadvantage the curvature and the surface texture of the 'pavement' have to be mentioned, which influence the sound radiatiorn conditions, the shape of the contact patch, and as a result, the noise generation mechanisms. On real roads these disadvantages do not exist but the measurement conditions cannot be controlled as well as in a laboratory. Additionally, with a car the examination of different tire dimnensions is difficult. To change the measuring tool (car) means to also change many other parameters. With a trailer it is possible to use only one tool for the examination of the influence of different parameters. The examination of the parameter torque is normally difficult to realise, especially when discussing accelerating torque, which is important for the tire-pavement noise and is a major element of the ISO-362 test. This paper reports measurements with a trailer conducted by the Automotive Engineering Department of Darmstadt University of Technology to investigate the influence of braking and accelerating torque on the tire/road noise. For the covering abstract see IRRD E104312.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 213-8

Subject/Index Terms

Filing Info

  • Accession Number: 00790184
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-9622072-3-3
  • Files: ITRD
  • Created Date: Apr 11 2000 12:00AM