16. The expert from ETRTO introduced ECE/TRANS/WP.29/GRB/2013/5, drafted in cooperation with the experts from Poland and the United Kingdom, proposing to update the test track requirements to ISO 10844:2011 as a supplement to the UN Regulation rather than a new series of amendments. He stated that the new test track with tighter tolerances would maintain the same nominal noise behaviour and that its introduction as a new series of amendments was not justified (GRB-57-02). The experts from France endorsed the proposal and stated that technical variations introduced by the new track would not justify a new series of amendments. The experts from Italy and Japan also endorsed ECE/TRANS/WP.29/GRB/2013/5.

17. GRB finally adopted ECE/TRANS/WP.29/GRB/2013/5 (superseding ECE/TRANS/WP.29/GRB/2013/2, ECE/TRANS/WP.29/GRB/2012/15 and ECE/TRANS/WP.29/GRB/2012/18) as reproduced in Annex II to this report. The secretariat was requested to submit the proposal to WP.29 and AC.1 for consideration and vote at their June 2013 sessions as draft Supplement 4 to the 07 series of amendments to UN Regulation No. 117. Moreover, GRB agreed that extensions of type approvals, granted by using the test track in accordance to ISO 10844:1994, may be carried out with the test track built in accordance with ISO 10844:2011, taking into account that this last would not negatively affect type approval noise test results.

18. The expert from the Russian Federation introduced ECE/TRANS/WP.29/GRB/2013/3, amended by GRB-57-01, proposing the use of a “Deceleration Calculator” software for the deceleration test method in the test procedure for measuring rolling resistance. He informed GRB about the variant of data processing in the rolling resistance deceleration test method basing on the dω/dt formula. He underlined that this variant was used as an alternative to the existing data processing stipulated in UN Regulation No. 117, not affecting the existing test methods, and that it fully matches ISO 28580 and the procedures of Annex 6 of UN Regulation No. 117. The “Deceleration calculator” is a mathematical tool providing high accuracy [σ < 0.001%; R2 > 0.999] of development in the experimental data. The concept dω/dt was incorporated into standard GOST R 52102.1 He also introduced GRB-57-25 to provide a background history on the development of legislation on rolling resistance and made a practical demonstration of the proposed “Calculator”.

19. GRB recommended that experts start using the proposed calculator and to provide comments at its September 2013 session. The expert from the Russian Federation was recommended to provide, in the meantime, further background information on the algorithms of the calculator and on both proposals (ECE/TRANS/WP.29/GRB/2013/3 and GRB-57-01), as well as demonstration at the next session of GRRF for an exchange of views.

15. The expert from the Russian Federation made a presentation (GRB-58-12) to introduce a revised proposal (ECE/TRANS/WP.29/GRB/2013/10) that would introduce a “Deceleration Calculator” software for the deceleration test method in the test procedure for measuring rolling resistance. The expert from France informed GRB that the proposed calculator had been verified for a first cycle of tests by the Technical Union for the Automobile, Motorcycle and Cycle Industries (UTAC). However, he added that the method should be still thoroughly analysed. The expert from ETRTO expressed some doubts on the variability of the method by temperature change and stated that further work was needed to demonstrate equivalence. The expert from the Russian Federation recalled that full cooperation was offered by the Russian experts as well as data sharing and asked GRB to take into consideration the positive experience developed by the industrial sector of his country in this field. The expert from France proposed to host a meeting of experts (date to be defined) in UTAC to further the exchange of views and finalize the proposal. The Chair of GRB suggested that other laboratories would start similar activities to evaluate the proposed method and devise possible alternative calculators to provide wider choice to future users. Finally, GRB endorsed the ad hoc meeting with the experts of ETRTO and the Russian Federation which was proposed by the expert from France to test the proposed “Deceleration Calculator”. It was also noted that once that the calculator was accepted by GRB as a valid alternative to the current one, it could be hosted on the WP.29 website, as an example, with an anonymous reference.

6. The expert from China introduced ECE/TRANS/WP.29/GRB/2013/4 and GRB-57-13 proposing amendments to improve the test method of the 02 series of amendments to the UN Regulation. The expert from OICA questioned the opportunity of introducing amendments to the 02 series of amendments, taking into account that the latter one would be superseded in a short time by the 03 series of amendments. He finally proposed that draft amendments of method B, concerning Annexes 9 and 10 of the UN Regulation introduced by ECE/TRANS/P29/GRB/2013/4, would be discussed at the next ISO Working Group 42 meeting in April, because affecting the measurement procedure of method B reproduced in Standard ISO 362-1:2007. The expert from ISO agreed on this approach. GRB agreed to resume discussion on this subject at its September 2013 session on the basis of a proposal jointly revised by the experts from China, ISO and OICA.

10. The EC expert informed GRB on the work progress of the European Union (EU) institutions on the EC proposal on vehicle noise. He added that at this stage no political agreement on new limits had been reached at the EU level.

11. The expert from China introduced GRB-56-07, proposing a different scheme to identify vehicle categories. He also added that his proposal would offer an option to cover needs of a broader range of countries. The experts from Japan and OICA endorsed the Power to Mass Ratio index (PMR) as a tool to link noise emission and vehicle performance. The EC expert recalled that to overcome the different national political priorities/classifications, the discussion should be focused on the mutual recognition principle of the 1958 Agreement, i.e. the vehicle complying with the lowest noise level would be accepted everywhere. He recalled that this would not prevent Contracting Parties from having less stringent requirements in their national law for their internal markets. Finally GRB agreed to resume consideration of GRB-56-07 at its February 2013 session to provide study time for experts.

12. GRB considered GRB-56-01 and GRB-56-05 supplementing ECE/TRANS/WP.29/GRB/2012/7 tabled by the expert from Japan. He explained that the proposal was based on GRB-55-01, including limit values with some modification of the threshold of subcategories, as a basis for a common position with the proposal tabled by the expert from Germany (GRB-54-03). Moreover, he made a presentation (GRB-56-21) concerning rationales for the proposed Stage 3 of limit values. The EC expert stated that the review of vehicle classification should not only consider the proposals tabled by the experts from Germany and Japan, but also the present vehicle classification in UN Regulation No. 51 and in the EC proposal and verify the rationales for the changes proposed by the experts from Germany and Japan.

GRB recalled that the EC proposal was available at: http://ec.europa.eu/enterprise/sectors/automotive/documents/proposals/index_en.htm#h2-1

13. Upon the suggestion of the Chair, GRB agreed to verify data and provide a basis for analysis for a power reference value of 160 kW in vehicle category M3 and for the reference value of 140 kW in vehicle category N2. Finally, GRB agreed to resume consideration on this subject at its February 2013 session on the basis of the above test data, if available, and on those existing provided by the experts from China, Japan and EC.

16. The expert from ETRTO introduced ECE/TRANS/WP.29/GRB/2013/5, drafted in cooperation with the experts from Poland and the United Kingdom, proposing to update the test track requirements to ISO 10844:2011 as a supplement to the UN Regulation rather than a new series of amendments. He stated that the new test track with tighter tolerances would maintain the same nominal noise behaviour and that its introduction as a new series of amendments was not justified (GRB-57-02). The experts from France endorsed the proposal and stated that technical variations introduced by the new track would not justify a new series of amendments. The experts from Italy and Japan also endorsed ECE/TRANS/WP.29/GRB/2013/5.

17. GRB finally adopted ECE/TRANS/WP.29/GRB/2013/5 (superseding ECE/TRANS/WP.29/GRB/2013/2, ECE/TRANS/WP.29/GRB/2012/15 and ECE/TRANS/WP.29/GRB/2012/18) as reproduced in Annex II to this report. The secretariat was requested to submit the proposal to WP.29 and AC.1 for consideration and vote at their June 2013 sessions as draft Supplement 4 to the 07 series of amendments to UN Regulation No. 117. Moreover, GRB agreed that extensions of type approvals, granted by using the test track in accordance to ISO 10844:1994, may be carried out with the test track built in accordance with ISO 10844:2011, taking into account that this last would not negatively affect type approval noise test results.

67. Agenda item 4.8.1, Regulation No. 117, document ECE/TRANS/WP.29/2013/55, add at the end:

Annex 4, the title, insert the reference to footnote ¹ and footnote ¹, to read:
“¹ The specifications for the test site reproduced in this annex are valid until the end of the period indicated in paragraph 12.9.”