Method of estimating the rolling resistance coefficient of vehicle tyre using the roller dynamometer

Author:

Soica Adrian1ORCID,Budala Adrian1,Monescu Vlad1ORCID,Sommer Slawomir2,Owczarzak Wojciech2

Affiliation:

1. Department of Automotive and Transport, Transilvania University of Braşov, RO 500036 Braşov, Romania

2. Faculty of Mechanical Engineering, Gdańsk University of Technology, Gdańsk, Poland

Abstract

The tendency in the past few years has been to introduce tyres with lower rolling resistance coefficients to the market. This paper presents a mathematical method for determining the rolling resistance coefficients variation depending on the speed. The method uses power balance which results from automobile dynamics while rolling on chassis dynamometer. The rolling resistance coefficients of tyres obtained through ‘drum test method’, for which the rolling resistance coefficients variation is known in terms of vehicle speed, are considered as reference values, while than rolling resistance coefficients of tyres obtained through ‘MAHA roller dynamometer’ using the recorded lost drag power in the roll-out phase on the stand are considered as tested values. The rolling resistance coefficients variation could be determined up to the maximum permissible speed of the tyre, for all wheels trained on the stand and not just for one tyre, as determined in laboratory conditions. The test conditions are similar to those in real road conditions, where the temperature of the environment and wheels cannot be controlled. The values obtained by the authors’ proposed method were compared with the values obtained by the ‘drum test method’. The main contribution of the proposed method is to estimate the rolling resistance coefficients without using a very expensive test facility.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Aerospace Engineering

Reference22 articles.

1. Kühlwein J. Driving resistances of light duty vehicles in Europe: present situation, trends, and scenarios for 2025. Report, International Council on Clean Transportation, Berlin, December 2016.

2. Fraggstedt M. Power dissipation in car tyres. Licentiate Thesis (TRITA-AVE 2006: 26, ISSN 1651-7660). Royal Institute of Technology, Stockholm, 2006.

3. Tyre rolling resistance and its influence on fuel consumption

4. Redrouthu BM, Das S. Tyre modelling for rolling resistance. Master’s Thesis, Chalmers University of Technology, Göteborg, 2014.

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