Proposal to amend para. 1.1., Footnote 1 to update the reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3.) document ECE/TRANS/WP.29/78/Rev.8, para. 2, and amend para. 4.5.1., Footnote 2 to update the reference to Annex 3 of the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.8.

Proposal to enable the approval of vehicles equipped with an Automated Driving System under this Regulation.

Proposal to clarify and update requirements for fitment of auxiliaries when testing the net power or 30 minutes power of electric drive trains.

Proposal to clarify and update requirements for fitment of auxiliaries when testing the net power or 30 minutes power of electric drive trains.

Proposal to permit the use of hydrogen (H2) as fuel for type approval of heavy-duty vehicles and to explicitly permit the usage of the reference fuel required for emission testing when the manufacturer applies for UN Regulations Nos. 24 and/or 49 type approval at same time.

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

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 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 permit the use of hydrogen (H2) as fuel for type approval of heavy-duty vehicles and to explicitly permit the usage of the reference fuel required for emission testing when the manufacturer applies for UN Regulations Nos. 24 and / or 49 type approval at same time.

This document is also available with tracked changes.

Also applicable for R85

Proposal to align UN R85 with ISO 1585:2020 and clarify the scope with regard to electric drive trains.

Proposal to explicitly permit the usage of the reference fuel required for emission testing when the manufacturer applies for
UN R24 and/or R49 type approval at same time.

Proposal to allow for the use of hydrogen (H2) as fuel for type approval of heavy-duty vehicles.

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. This proposal would permit the use of the same test fuel in cases where the testing for emission of gaseous and particulate pollutants is conducted at the same time as the testing under UN R85.

Proposal to permit the use of hydrogen (H2) as fuel for type approval of heavy-duty vehicles.

Proposal to clarify the scope of Regulation 85 concerning electric drivetrains.

Proposal to align UN R85 with ISO 1585:2020.

Proposal to permit the use of the gaseous reference fuels described in UN R83 in order to reduce potential testing complexity.

Proposal to permit the usage of the gaseous reference fuels described in UN Regulation No. 83 in order to reduce potential testing complexity.

Proposal to allow an alternative test method (recognized in SAE J1349) to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5.

Proposal to allow an alternative test method to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5. This alternative method is well recognized in SAE J1349.

Proposal to reduce testing burdens by introducing an alternative test method to “decrease the charge air cooler outlet temperature by the same amount that the ambient conditions for the vehicle test varied from the standard temperature.” This aligns with SAE J1349, “9.3 Application of Vehicle Transient Data to Net Power Test.”

Proposal to allow an alternative test method to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5. This alternative method is well recognized in SAE J1349.

Proposal to reduce testing burdens by introducing an alternative test method to “decrease the charge air cooler outlet temperature by the same amount that the ambient conditions for the vehicle test varied from the standard temperature.” This aligns with SAE J1349, “9.3 Application of Vehicle Transient Data to Net Power Test.”

Explanation of the proposal (GRPE/2018/19) to align UN R24 (Compression Ignition Engines – Emission of Visible Pollutants – Power Measurement) with UN R85 with regard to correction factors.

Proposal to introduce an alternative test method for measuring charge-air-cooled engines net power for use with high power engines of those. The proposal would “decrease the charge air cooler outlet temperature by the same amount that the ambient conditions for the vehicle test varied from the standard temperature” in line with SAE J1349, “9.3 Application of Vehicle Transient Data to Net Power Test.”

Proposal to clarify the wording of the determination of the net power for electric motors and to correct an error in the formula presented in paragraph 5.4.2. Diesel engines – Factor αd. The parameter “f_m” in the equation should be a superscript (e.g., meaning “to the power of f_m”). Through a transcription error, this factor was rendered in normal text.

Revised proposal, superseding document GRPE/2018/5, to clarify the wording of the determination of the net power for electric motors and to correct an error in the formula presented in paragraph 5.4.2. Diesel engines – Factor αd. The parameter “f_m” in the equation should be a superscript (e.g., meaning “to the power of f_m”). Through a transcription error, this factor was rendered in normal text.

Proposal to clarify the wording of the determination of the net power for electric motors and to correct an error in the formula presented in paragraph 5.4.2. Diesel engines – Factor αd. The parameter “f_m” in the equation should be a superscript (e.g., meaning “to the power of f_m”). Through a transcription error, this factor was rendered in normal text.

Proposal to correct an error in the formula presented in paragraph 5.4.2. Diesel engines – Factor αd. The parameter “f_m” in the equation should be a superscript (e.g., meaning “to the power of f_m”). Through a transcription error, this factor was rendered in normal text.

Report on the status of the International Whole Vehicle Type Approval program with regard to regulations under the purview of GRPE.

Presentation on the background and accomplishments of the GFV informal group from January 2008 to June 2016 as the group concludes its final effort on heavy-duty dual fuel engine retrofit systems.

Proposal to avoid a redundant correction of the measured engine power of supercharged and turbocharged engines fitted with a self-correcting system for ambient conditions such as temperature and altitude. The current correction factor may yield inaccurate results for such configurations.

Proposal to avoid a redundant correction of the measured engine power of supercharged and turbocharged engines fitted with a self-correcting system for ambient conditions such as temperature and altitude. The current correction factor may yield inaccurate results for such configurations.

Proposal to clarify the determination of net power in cases where an additional fan or other method is used to maintain the temperature of the engine coolant within the prescribed range.

Proposal from the GRPE secretariat to correct typographical and editorial errors in the current official text.

The purpose of this proposal is to adjust the engine power-measurement calculation for supercharged and turbocharged engines fitted with a system that compensates for ambient conditions such as temperature and altitude. The proposed change would eliminate redundant correction factors that result in inaccurate results for these engine configurations.

GRPE-adopted proposal to introduce provisions for heavy-duty dual-fuel vehicles into UN Regulation No. 85.

Presentation on the status of GFV activities, including for heavy-duty dual-fuel vehicles, bi-fuel gas vehicles, liquefied natural gas (LNG) vehicles, and support to the European Commission concerning THC/CH4 (methane).

This document is a revised version of informal document GRPE-62-17 intended to introduce provisions for heavy-duty dual-fuel vehicles into UN Regulation No. 85 in accordance with those proposed in the GFV proposal to amend Regulation R49.

Gaseous-fueled vehicles informal group review of the proposals developed by the Heavy-Duty Dual-Fuel Task Force to introduce related provisions into UN Regulations Nos. 49 and 85.

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.

GFV overview of existing emission definitions applicable to light and heavy duty vehicles in EU and UNECE legislation, including certain definitions currently (February 2012) under discussion, in order to identify possible inconsistencies.

Status report of the HDDF task force for presentation to the Working Party on Pollution and Energy during its 63rd session.

Progress report of the informal group working on heavy-duty dual-fuel vehicle provisions in UN Regulations 49, 85, and 115.