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

Series of proposals from the WLTP informal group to improve and clarify the text of GTR 15 on light vehicle emissions. This document is also available with track changes: pdf version and doc version.

Draft status report on Part B of the November 2016 mandate for the Electric Vehicles and the Environment Informal Working Group (EVE IWG).

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

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

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

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.

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.

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

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

Compressed (.zip) file containing the documentation for the 25th EV subgroup session, including documents related to charging, drive trace index, fuel cell-hydrogen vehicles (FCHV), REESS voltage measurement, and UF coefficients.

Establishment of the Executive Committee (AC.3) of the 1998 Agreement Fifty-third session (agenda item 12) – Consideration and vote by AC.3 (agenda items 14.2, 14.3 and 15)

Series of proposals from the WLTP informal group to improve and clarify the text of GTR 15 on light vehicle emissions, amending the contents of document GRPE-76-26/Rev.1.

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

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;

Meeting minutes, documents from the meeting are included in the document.

Meeting minutes, documents from the meeting are included in the document.

[Adopted with Canada and US abstaining.]

Report on the development of Amendment 4 to GTR 15. Amendment 4 is part of the second phase development of the GTR mandated to:

1. Introduce definitions of response time, delay time and rise time harmonized with those in GTR Nos. 4 and 11
2. Introduce improvements to the gear shifting procedures
3. Ensure consistency in the use of the terms accuracy, precision, resolution, tolerance, repeatability and deviation
4. Address bi-fuel and bi-fuel gas vehicles in accordance with UN R83
5. Clearly define the appropriate positioning of payload mass (25 kg plus the mass of vehicle load)
6. Correct terminology such as “classes of rolling resistance coefficients”
7. Correct minor spelling and/or punctuation mistakes, and restructuring some paragraphs
8. orrect some equations and to make them all consistent with Word’s use of mathematical symbols
9. Exclude all Rechargeable Electric Energy Storage Systems (REESSs) that do not contribute to vehicle propulsion from monitoring
10. Better define the purity of certain gases such as nitrogen and synthetic air
11. Define more specifically the difference in mass of CO2 during charge sustaining between the test with the highest and lowest positive and negative electric energy charge

EVE informal group form prepared to gather views in support of the discussion on whether to pursue electric vehicle power determination procedures towards the establishment of a new global technical regulation or towards drafting an annex for inclusion in GTR 15 on light vehicle emissions test procedures.

Japan comments in relation to the EU submission WP.29-174-09.

Consolidated version of GTR 15 including the draft Amendment 4 as approved by the Working Party on Pollution and Energy. The amended GTR will be considered for adoption during the June 2018 World Forum session.

Japan proposals for consideration by the WLTP Low Temperature task force.

Annex 8 vehicles: Distinction between vehicles with and without an Internal Combustion Engine, including battery and fuel-cell EVs

Revised proposal for Amendment 4 to GTR 15 from the WLTP informal group.

Revised proposal from the WLTP informal group pursuant to GRPE-76 discussions for Amendment 4 under the Phase 2 development of GTR 15.

OICA proposal to explore the possibilities for harmonizing RDE procedures adopted around the world.

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).

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

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