Letter from the Retrofit Emissions Control Devices (REC) informal group to solicit input regarding the proposed two-stage implementation of stringency levels in the new REC regulation under development.

Orientation presentation reviewing the informal group structure, key contacts, explanation of the WP.29 mandate, and review of the terms of reference for the scope, objectives, and procedures of the group.

Proposed agenda for the first meeting of the informal group working on environmental requirements for electric vehicles.

Revised project plan for the two phases anticipated for the new regulation on retrofit emissions devices for heavy-duty vehicles.

Working draft of the “Draft new Regulation on uniform provisions concerning the
approval of Retrofit Emission Control Devices (REC) for heavy duty vehicles, agricultural and forestry tractors and non-road mobile machinery (NRMM) equipped with
Compression Ignition engines”.

Working draft of the proposal for an amendment to the regulation on retrofit emissions control devices for heavy-duty vehicles, to be submitted in a second step to increase the regulation’s stringency.

Report of the informal group session held in Tokyo during March 2012. This group is working to add provisions for heavy-duty hybrid vehicles to GTR No. 4 (WHDC).

In 2011, the WLTP-DTP group agreed to pursue an improved definition of vehicle test mass and a step-less approach to the inertia class system. This revised document describes the current view on the combined approach for vehicle test mass, inertia setting, tire and vehicle selection.

Revised version of document GRPE-62-17 prepared by the chair of the GFV informal group in order to extend the scope of Regulation No. 85 to include heavy-duty dual-fuel (diesel-gas) engines.

Corrections to align the unit of each factor in the equations 8-2, 8-4, 8-6, and 8-10 in paragraph 8 and to Annex 13, paragraph 1, Figure A13-1 where, in the upper figure for “gear use during acceleration phases”, the acceleration gear 1 incorrectly starts from zero.

Document GRPE/2012/13/Rev.1. contains all the major amendments to Regulation No. 49 that are considered necessary to type approve heavy-Duty dual-fuel engines and vehicles, except appendixes 3, 4, 5 and 6 of Annex 15. This document corrects typographic errors and cross-references in that proposal.

Working draft of the document consolidating working document GRPE/2012/13/Rev.1 with the pending informal documents GRPE-64-xx1 (completing the working document) and GRPE-64-xx2 (correcting the working document).

Document GRPE/2012/13/Rev.1. contains amendments to Regulation No. 49 considered necessary to type-approve heavy-duty dual-fuel engines and vehicles, except for appendixes 3, 4, 5 and 6 of Annex 15. This document provides the missing appendices and offers editorial corrections to UN R49.

Copy of the GRPE submission prepared by the GFV Chair of the informal group to correct a measurement error contained in documents GRPE/2012/6 (concerning UN R83) and GRPE/2012/7 (concerning UN R115) when weighing method and G25 reference fuel are used.

Documents GRPE/2012/6 and 7 introduce the calculation of NG/biomethane energy ratio during a type I cycle by weighing the NG/biomethane mass consumed. The formulas are affected by an error when G25 reference fuel is used. This proposal precribes a modification to the previous formulas.

Review of Japanese research into procedures for assessing the impact of air-conditioning systems on vehicle fuel efficiency.