Tyre/road noise measurements on ISO tracks according to the UNECE Regulation 117

Truls Berge; Piotr Mioduszewski

doi:10.3397/in_2022_0507

Tyre/road noise measurements on ISO tracks according to the UNECE Regulation 117

Abstract

Within the Polish-Norwegian research project ELANORE, a limited Round Robin Test has been performed on 3 ISO tracks in Northern Europe. The basic objective of the project is to improve the EU directive on labelling of tyres for noise and rolling resistance, and this directive is based on the measurement procedures defined in the UN ECE Reg.117. The same test car, test tyres and measurement equipment as well as personnel were used on all test tracks, to minimize the measurement uncertainties. All tracks were built according to the specification given in ISO 10844:2014. Five sets of C1 tyres were tested. They consisted of 2 sets of summer tyres, one all-season, one winter and one set of the SRTT tyres. Except for the SRTT tyres, the other 4 had labelled noise values from 67 to 74 dB. In addition to the test conditions specified in Reg.117, a modified test was also included, where the load and inflation pressure were adjusted to fit better the test vehicle specifications. Due to some adverse weather conditions at two of the test tracks, only a part of the test program was accomplished. The paper presents results from these measurements. Additional measurements are planned for 2022.