Proposal to add assembly plant(s) to the approval information document.

Proposal to ensure consistency in the vehicle categories within scope across emissions regulations and with regional requirements within Europe.

1. The current scope of the proposed UN Regulation on RDE (GRPE/2023/3) does not cover all vehicle categories within scope of other UN emissions regulations relevant for light duty vehicles and is inconsistent with regional legislation within the UK and Europe.
2. The proposed amendment seeks to allow Contracting Parties to optionally apply this regulation for vehicle category N2 and for M2 vehicles above 3,500 kg technical permissible maximum laden mass when the reference mass is below 2,610 kg. This would enable equivalent coverage of the scope to regional requirements in Europe and the acceptance of a full UNECE emissions regulation package for those vehicle categories in that region.
3. Provisions relating to the extension of type approvals to vehicles with a reference mass not exceeding 2,840 kg have also been applied to categories M2 and N2 where Contracting Parties are applying the broader scope of vehicle categories.

Proposal to promote harmonisation in use of reference fuels for testing, including hydrogen fuel, based on the following justifications:

1. The use of test fuels is permitted for certification testing of gaseous and particulate pollutants and power/smoke testing in Europe. However, other countries that have adopted and referenced UN R85 may not allow this. In this case, manufacturers have to prepare fuels with different characteristics, which is costly and requires a long time due to the current inconsistent situation.
2. We believe that the use of test fuels for gaseous and particulate pollutant measurement tests should be a priority as a precondition for the introduction of more stringent emission levels.
3. Hydrogen fuelled vehicles are covered in UN Regulation No. 83, but hydrogen is not yet covered in UN R49 and UN R85.
4. Hydrogen fuelled engines could be one complementary option to reduce CO₂ emissions of future heavy-duty vehicles.
5. Therefore, hydrogen fuel should be integrated in UN R49 and UN R85 for better alignment with UN R83.

Proposal to allow higher tolerance for pressure measurement under paragraphs 4.7 and 4.8 (+ aligned intake and exhaust) in order to avoid refusal of test due to the non-compliance of pressure accuracy and based on the low impact on the αd. Value or approach (linearity?) to be discussed.

Proposal for updated goals and objectives for the EVE informal group, including

• A new GTR on battery durability for electric heavy-duty vehicles (to GRPE in June 2024)
• Amendments to GTR 22 on light vehicle battery durability (through January 2024)
• Consideration of candidate test method and family concepts under GTR 21 on power determination
• Support to the Group of Experts on Energy Efficiency on the upstream impact of electric vehicles on energy consumption and emissions.

Proposal to postpone the work on a GTR until after pending national/regional legislation has been enacted (e.g., Euro 7 and US proposal on light vehicle emissions).

Background on changes proposed to UN R49 and UN R85 to address hydrogen fuel and heavy vehicles.

Proposal based on ECE/TRANS/WP.29/GRPE/2021/14, as amended by Annex X of the report of the 83rd GRPE (Supplement 7 to the 06 series of amendments). Some modifications were not taken onboard in the 07 series of amendments (and Supplements 1, 2 and 3). For the remaining amendments included in this proposal, the justifications are:

1. UN R49 does not define 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%.
2. Typo error: the instrument should be now in NOx mode.
3. To clarify the operation procedure, make the text easier to be understood.