Working Party on Noise and Tyres | Session 78 | 30 Aug-1 Sep 2023
Geneva
AGENDA
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Agenda Item 7. (c)
UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

GRBP will be briefed on the activities of the IWG on Wet Grip Performance of Tyres in Worn State (IWG WGWT).

GRBP is invited to address a proposal by IWG MU which introduces measures to reduce variability.

GRBP will recall that, at its previous meeting, the expert from the American Automotive Policy Council (AAPC) briefly introduced GRBP-77-23 and that GRBP agreed to address the issue in detail at this session.

Documentation
GRBP-77-23 UN R117: Request for consideration of a special case during the 78th (August 2023) GRBP session (AAPC)
GRBP-78-04 UN R117: C2 noise temperature correction update
GRBP-78-05 UN R117: Proposal for Supplement 2 to the 04 series of amendments
GRBP-78-06 UN R117: ETRTO and STEER Analysis of Measurement Uncertainty
GRBP-78-07 Measurement Uncertainties when Testing in WP.29 GRBP Vehicle Regulations
GRBP-78-15 Worn Tyres: Proposal for revised Terms of Reference for the working group
GRBP-78-16 Worn tyres: Status report of the working group
GRBP-78-28/Rev.1 New design C3 standard reference test tyres (ETRTO)
GRBP-78-33 UN R117: Proposal for amendments (AAPC)
GRBP/2023/19 UN R117: Proposal for Supplement 2 to the 04 series of amendments
UN R117
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