List of informal proposals under development within the WLTP informal group for possible submission to the January GRPE session.

Proposal for refinements to the text with regard to testing of electric vehicles under Annexes 4 and 8.

Proposal of amendments to document GRPE/2017/9 by the WLTP informal group for the January 2018 GRPE session (i.e., amendments to Amendment 3 of GTR 15 which was adopted (as document WP.29/2017/140) by WP.29 during its November 2017 session).

Draft letter intended for the UN Office of Legal Affairs to handle three planned series of amendments to the proposed UN Regulation transposing GTR 15 (WLTP) simultaneously. Normally, each series of amendments to a regulation must be implemented sequentially. In the case of WLTP, the informal group is proposing to use the series of amendment to implement stringency levels based upon regional needs (e.g., 00 series for the EU, the 01 series for Japan, and the 02 series as the most stringent set of requirements). The informal group is considering a request to handle this situation differently such that the 3 initial series would be implemented simultaneously, enabling future changes in regional stringency to proceed in a timely fashion (e.g., parallel development of new series based on regional objectives).

Status report of the task force working on the transposition of GTR 15 into a UN Regulation for use under type approval.

Table of regional options for inclusion in the UN Regulation transposition of GTR 15.

Discussion of CO₂ measurements and root mean squared speed error (RMSSE) pursuant to round robin methodology validation testing in Europe.

Proposal by Japan of items to be addressed during the development of the Type V (durability) testing under the draft WLTP UN Regulation.

Propylene and Toluene Response Factors (Annex 5 Para 5.4.3.)
Methane Response Factor (Annex 5 Paragraph 5.4.3.)
Instrument calibration (Annex 5 Paragraph 5.1.)

During discussion in WLTP/DTP, 40 CFR Part 1066 was not finalized yet. Therefore, the values from text in 2011 were used in GTR15. However, the value in CFR were changed to 1.0% from 0.5%. This changes were made to harmonize with other regulations and also because CH-DY manufacturers could not comply with this value.

NO Consistency of Tyre RRC
3g/km Extension from Cal. ? or Test CO₂ value ?
How to develop f₀ and f₂ with fixed f₁ ?
Adjusted f_0,L and/or f_2,L are bigger than f_0,H and/or f_2,H ?
Huge Error when adjusting f_1,L to f_1,H

Presentation of outcomes from the Computational Fluid Dynamics method working group.

Computation Fluid Dynamics working group table of issues;

Copy of the proposal submitted for adoption during the June 2018 World Forum session.

Report of the gearshift and cycle issues task force to the WLTP IWG and proposals for further improvement of annex 2.

Discussion of the two possible interpretations of the phrase “CO2 emission of vehicle H”:

Proposal to add the definition for “on-board charger” and to add paragraphs to Annex 8 Appendix 4 regarding REESS and nominal charging.

Report on consideration of Computational Fluid Dynamics method as a means to simulate aerodynamic drag.

Annex 4 task force proposals.

Provision to address cases where use of interpolation method produces “unrealistic results”.

12 September 2018 WLTP informal group workshop on EET mixtures.

Minutes of the WLTP Workshop ”Calibration and Instrument Gases for WLTP Vehicle Emissions Testing”
Webex Workshop, September 12th 2018.

Presentation on the status of the transposition of GTR 15 into UN Regulations.

DTI Task Force draft text (MaN, TH, and MaN).

Draft text including comments, especially highlighting open issues.

Items from the session for integration into the draft amendment to GTR 15.

Japan proposal to postpone any work on a UN GTR regarding light vehicle OBD for another 12 months.

Report of the CFD working group under the WLTP New Issues task force.