Proposal by the expert from OICA to clarify concerns about terms "coasting"and “Twin roller dynamometers in 4WD operation”

OICA comment on the IWG EVE proposal for GTR on in-vehicle battery durability

Proposal suggests that 2 new series of amendments are necessary: 83.08 to cover ISC for the WLTP Test and 83.09 to add ISC for the new UNR „RDE“ (which also has no ISC requirements) because Contracting Parties should be free to apply UNR 154 and UNR "RDE“, each with or without ISC without connection
A Contracting Party applying UNR 154 and UNR 83.08 but not UNR "RDE“ would be obliged to conduct or at least monitor RDE ISC in the absence of 83.09

This proposal aims at harmonizing the text of UN Regulation No. 83 and UN Regulation No. 101. Furthermore, one error was found in the formulas used for the calculation of a NEDC road load values from those determined according to UN GTR No. 15 (WLTP) and one wrong cross reference in the 01 series of amendments to UN Regulation No. 101.
1. Harmonization of UN Regulation No. 83 (Annex 4a, Appendix 7b, paragraph 1.) and UN Regulation No. 101 (Annex 7, Appendix 2, paragraph 1.); in Annex 7, Appendix 2, paragraph 1. Vehicles in general are not approved according to UN GTR No. 15, therefore the text phrase of UN R83 is recommended.
2. Correction of wrong reference to Annex 4 instead of Annex 7 of UN GTR No.15; in Annex 7, Appendix 2, paragraph 2.1.(b).
3. When copying the methodology from EU regulation, a ‘.’ was wrongly introduced instead of a ‘-‘ in the formula.

Proposal to amend Annex 7 – Appendix 2 paragraph 1., to provide the road load power calculation method that may be used

Proposal identifies 2 concerns:
“Coasting“ – Coasting is defined in GTR 15 and UNR 154 and must be deactivated for testing, may raise concerns for the approval of many hybrid vehicles and for conventional vehicles with modern start stop systems.
“Single roller dynamometer in 4WD operation“ – This combination is forbidden by GTR 15 and UNR 154 for the Type 1
test. There appears to be no reason for this ban (restraint systems must meet requirements for all configurations) other than an assumption that the configuration is not used for type 1 testing

Proposes a shortened Test Procedure NEDC for PEV and alternative for conformity of procedure.

The presentation supports the proposal for a Shortened Test Procedure NEDC for PEV acc. to WLTP (including adding PEV COP procedure alternative).

Proposes the modifications (essentially corrections of mistakes) are derived from the text of document ECE/TRANS/WP.29/GRPE/2021/7 from Japan, related to UN GTR 04, as modified by Informal Document GRPE- 82-09

Proposal makes changes to take into consideration the availability of gases for flame ionization detectors and the linearization of the gas analyzer.
UN R49 defines no linearity requirements for humidity sensors. As the humidity content of the intake air is an essential measure for the calculation of the specific exhaust emission, it is important to add requirement for humidity sensor (Reference: ISO 16183 the accuracy of the absolute humidity shall be +- 5%).

As the gas divider is a necessary tool to verify the linearization of the gas analyzer it is mandatory that the deviation of the gas divider is lower than that of the instrument under test. In combination with a calibration gas which has an accuracy of 1 % and a gas divider, which has an accuracy of 1 % it is only possible to reach a guaranteed analyzer accuracy of 2 %.

In the automotive industry Helium is used as so fuel gas for flame ionization detectors (FID) to measure Hydrocarbon emissions. In the FID fuel gas Helium is mixed with Hydrogen in a ratio of 40 % H2 and 60 % He. The annual fluctuations of the helium global market lead to an insufficient supply with FID fuel gas, like happened lately during summer 2018. In order to prevent the industry from the fluctuations of the global helium market, the US legislation reacted already in 2014 and allowed the usage of Nitrogen as batch gas for the FID fuel gas.

Proposes to amend the scope to clarify that UN R 49-06 series engine certification (corresponding to Euro VI) have no smoke and does not include the certification according to UN Regulation 24.

Compares terminology between M.R. 2 in comparison to UN GTR15