Working Party on Noise | Session 60 | 1-3 Sep 2014
Geneva
Agenda Item 7.
Regulation No. 117 (Tyre rolling noise and wet grip adhesion)

11. The expert from the Russian Federation introduced some clarifications to be included in UN Regulation No. 117, on data processing for the measurement method of tyre deceleration value obtained in differential form dω/dt (ECE/TRANS/WP.29/GRB/2014/7). GRB adopted this proposal, as amended by Annex V to this report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2015 sessions.

12. The expert from ERTRO introduced ECE/TRANS/WP.29/GRB/2014/8 to propose new time measurement accuracy for instrumentation involved in the rolling resistance method (Annex 6 to the UN Regulation). The expert from Japan reiterated his reservation that the proposed accuracy might be too strict and asked GRB to postpone the consideration of this item to the next session. The expert from the Russian Federation agreed with this suggestion. GRB recalled that this issue had already been discussed several times and felt that a final decision should be taken at the next session. Meanwhile, experts from Japan, Russian Federation, ETRTO, as well as from other Contracting Parties were invited to finalize their consultations.

Documentation
GRB-60-08/Add.1 Shifts in tyre sound levels between 2007 and 2013 (Addendum) (M+P and Netherlands)
GRB-60-17 ISO 10844: Comparison of 2014 version against 2011 version (ISO)
GRB/2014/7 Proposal for Supplement 6 to the 02 series of amendments to Regulation No. 117 (Russia)
GRB/2014/8 Proposal for Supplement 7 to the 02 series of amendments to Regulation No. 117 (ETRTO and Russia)