Session 74 | Geneva | 19-22 Feb 2013
GRRF-74-04
Proposal to amend the document GRRF/2012/19 (ETRTO)
23 Jan 2013 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Amendments to the proposal to amend the snow test method for C3 tyres in order to prescribe the wider of the possible speed ranges. Corrects wording to replace “blocking differential” with “differential lock” and mandatory use of differential lock in certain cases. GRRF-74-0004
GRRF-74-08
Proposal of editorial corrections to document GRRF/2013/9 (EC)
11 Feb 2013 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Editorial corrections to the proposal prepared by the European Commission (EC), France and European Tyre and Rim Technical Organisation (ETRTO) to introduce wet grip provisions and testing procedures for tyres of categories C2 and C3. GRRF-74-0008
GRRF-74-43
Tests supporting provisions for the snow test for tyres of category C3 (ETRTO)
21 Feb 2013 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Relation between L&R slip ratio difference and ACC without TCS and Differential Lock and Comparison between Traction Control System “ON” and “OFF”. GRRF-74-0043
GRRF/2013/9
Proposal for amendments to Regulation No. 117 (EC, France, and ETRTO)
12 Dec 2012 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Text prepared by the European Commission (EC), France and European Tyre and Rim Technical Organisation (ETRTO) in order to introduce wet grip provisions and testing procedures for tyres of categories C2 and C3. GRRF/2013/0009