118. AC.3 noted the latest work progress of the GRPE informal group on WLTP and its subgroups in the development of the gtr. The representative of Germany underlined the tough timeline to develop the gtr on WLTP and the complexity of the process and multiple tasks. He expected GRPE to consider in detail, at the forthcoming session in January 2011, the situation based on the report of both WLTP subgroups DHC (Development of the Harmonized test Cycle) and DTP (Development of the Test Procedures) as well as the vacant chairmanships of WLTP and DTP (see report ECE/TRANS/WP.29/1085, paras. 38 and 91).

91. Agenda item 16.9, Worldwide harmonized Light Vehicle Test Procedures (WLTP). AC.3 noted the information provided by the representative of the United States of America in Informal document No. WP.29-151-07 (see para. 38 above).

124. On behalf of the technical sponsors, the Chair of GRPE reported on the progress made by the two subgroups on the Development of the Harmonized driving Cycle (DHC) and on the Development of the Test Procedure (DTP). He informed AC.3 that the ongoing discussions on developing the Worldwide harmonized Light vehicles Test Procedure led to a delay of 4 months and a revised roadmap for the development of the UN GTR. He announced that this could require a special GRPE session in autumn 2012.

89. The Chair of GRPE informed AC.3 about the group’s activities on Worldwide harmonized Light vehicles Test Procedures (WLTP). He reported on the progress of the work on the cycle and the test procedure. He stressed the complexity of the work, with around 10 informal working groups and subgroups and recalled the need for an additional session of GRPE for the final adoption of the draft UN GTR (see para. 11 above). He expected that as a result of the additional GRPE session, a draft UN GTR could be submitted to AC.3 for final consideration at its March 2014 session.

18. Having recalled the mandate documents (ECE/TRANS/WP.29/AC.3/26 and Add.1) and the information on the status of the DTP work, the GRPE Chair concluded indicating that the adoption of the UN GTR will conclude the first stage of phase I, while the second stage will result in an amendment of the UN GTR.

15. The Chair of the informal subgroup on the Development of the Test Procedure (DTP) reported on the work status of the subgroup (GRPE-66-36). He stated that there are a number of remaining open issues that need to be addressed. According to the mandate documents (ECE/TRANS/WP.29/AC.3/26 and Add.1) three phases are included in the WLTP terms of reference: phase I, concerning the development of the UN GTR (test cycle and test procedure); phase II, concerning on-board diagnostics (OBD) and additional tests (e.g. on pollutants other than CO, NOX, hydrocarbons and particulate matter); and phase III, about reference fuels and performance requirements. Phase I can be further divided in two stages, with the aim to continue work on still open issues and to improve and correct the text of the GTR based on validation and experience. The issues that are foreseen to be solved in phase I, stage 1, include: (i) Rechargeable electric energy storage system Charge Balance (RCB) correction; (ii) the warm-up procedure for the road load and dynamometer setting; (iii) the speed trace violation, concerning deviations from the test cycle beyond the prescribed tolerances; (iv) the definition of the predominant mode for vehicles with multimode gearboxes; and (v) the temperature correction for regional representative conditions for the CO2 emission determination. Other issues could be finalized in phase I, stage 1, or eventually (in a fall back solution) postponed to stage 2: (i) the table of running resistances, concerning default values to be used in the dynamometer settings if the road load cannot be determined; (ii) the ambient temperature for coast-down (the latest discussions were settling on 5 to 40°C ± 5°C); and (iii) utility factors on electric vehicles. If an agreement is not reached in phase 1, stage 1, the issues will need to be defined regionally. Concluding his intervention of the status of the DTP subgroup, the DTP Chair reported that, even if the coast down and wheel torque methods are agreed, the wind tunnel and the comparison of road load determination methods are likely to be addressed in phase I, stage 2.

79. Submitted for consideration and vote, the proposed draft UN GTR on WLTP (ECE/TRANS/WP.29/2014/27 and its Corr.1) was established in the UN Global Registry on 12 March 2014 by consensus vote of the following Contracting Parties present and voting: Australia, China, European Union (voting for Cyprus, Finland, France, Germany, Hungary, Italy, Lithuania, Luxembourg, Netherlands, Romania, Slovakia, Spain, Sweden and the United Kingdom), India, Japan, Norway, Republic of Korea, Republic of Moldova, Russian Federation, South Africa and Turkey.

80. The technical report (ECE/TRANS/WP.29/2014/28) and the adopted proposal for the development of the UN GTR (ECE/TRANS/WP.29/AC.3/26 and its Add.1) will be appended to the established UN GTR.

81. The representative of the Republic of Korea welcomed this new UN GTR which is closely related to fuel efficiency. He stated that his country was making every effort to provide consumers with accurate information. He announced that his country would contribute in the work of the IWG for developing Phase 2 of the UN GTR.

82. The representative of the United States of America abstained. He explained that the existing requirements in his country provided significant controls, covered many different operating systems and applied to various pile requirements. It was also explained that his
country still needed to verify the equivalence of the provisions of the UN GTR with their current national regulations. However, he stated that his country supported the UN GTR and looked forward to further contributing to aligning the two sets of regulations as part of future WLTP work. The representative of Canada also abstained providing similar justifications.

83. The representative of Germany welcomed the establishment of the UN GTR on WLTP which completes the emissions requirements for all categories of vehicles covered by UN GTRs. He thanked the co-sponsors of the UN GTR, all experts of GRPE, WLTP informal groups and task forces for their longstanding efforts.

114. The representative of the European Union informed AC.3 about the progress made by the IWG on WLTP. She mentioned that draft Amendment 1 to UN GTR No. 15 was adopted as result of Phase 1B activities at the last GRPE session in January 2016 and it will be submitted to AC.3 at its June 2016 session for further consideration.

115. The representative of the European Union presented WP.29-168-11 including some additional information to ECE/TRANS/WP.29/2016/29 on the mandate of the IWG on WLTP for Phase 2 activities. AC.3 endorsed WP.29-168-11 and requested the secretariat to distribute it with an official symbol at its June 2016 session.