Presentation arguing for a “basic rule” to ensure a consistent framework for engine retrofit regulations.

Proposal to introduce an amendment to documents GRPE/2013/8 and GRPE-66-10 that would permit the manufacturer to request a temporary disablement of OBD monitors at low ambient temperature in the same manner as permitted at high ambient temperatures (above 35°C).

Revised proposal to introduce an amendment to documents GRPE/2013/8 and GRPE-66-10 that would permit the manufacturer to request a temporary disablement of OBD monitors at low ambient temperature in the same manner as permitted at high ambient temperatures (above 35°C).

As the Euro VI standards for heavy duty vehicles become mandatory throughout the European Union, manufacturers may adapt their certification processes to take account of the extended scope of Euro VI compared to Euro V. In order to prevent inconsistencies that could affect the ability to offer all vehicles for export, it is proposed to carry back this scope amendment retrospectively to the 05 series of amendments.

Since Euro VI will be fully implemented in the EU from 31 December 2013, this amendment has no effect on EU Approvals or equivalences.

Proposal to add text omitted during the preparation of working document GRPE/2014/12 (proposal to update requirements in line with the current state of technology and to transpose the latest decisions of the EU regarding OBD threshold limits).

Explanation and rationale for the proposal to update OBD threshold limits and align UN R49 with the latest EU OBD requirements.

Proposed amendments to the OICA text proposed in order to adapt certain requirements to the current state of technology and to transpose the latest decisions of the EU regarding OBD threshold limits.

This document is a consolidated text that includes the proposals of the GRPE working document GRPE/2014/12, the proposals of the informal document GRPE-69-07/Rev.1 and the comments to these documents as received from the contracting parties during GRPE 69 session.

Proposal from the International Organization of Motor Vehicle Manufacturers (OICA) to adapt certain requirements to the current state of technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits.

This proposal aligns the transitional provisions of Revision 6 of UN Regulation 49 and thus in document GRPE/2014/3 with the General Guidelines for UN Regulations (WP.29/1044/Rev.1). This change requires changes to Table 1 of Annex 3 to cover diesel and dual-fuel engines bearing the letter B.

The proposal also would allow for methods other than monitoring the reagent tank level or reagent flow in order to monitor reagent consumption in Annex 11.

Consolidation of documents GRPE/2015/3 (proposal to adapt requirements to the current technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits) and GRPE-70-06 (concerning transition provisions and reagent consumption monitoring methods).

Supporting information concerning documents GRPE/2015/3, GRPE-70-06, and GRPE-70-07 (Proposal from the International Organization of Motor Vehicle Manufacturers (OICA) to adapt certain requirements to the current state of technology and to transpose the latest decisions of the European Union (EU) regarding on-board diagnosis (OBD) threshold limits).

Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 with the provisions in Regulation No. 96.

Proposal to adapt the requirements related to fuel injection malfunction monitoring (OBD) to the current state of technology. The current requirements are kept as an option left to those manufacturers that have already agreed with their approval authority to implement a monitoring solution that differs from that specified in this proposal.

Proposal to adapt the requirements related to fuel injection malfunction monitoring (On-Board Diagnostic systems) to the current state of technology.

Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 to the provisions in Regulation No. 96.

Proposal to clarify Annex 10, paragraph 11 with respect to the “formal documentation package” according to paragraph 5.1.4.2. and the “extended documentation package” described in paragraph 5.1.4.3.

Proposal to add the condition “when the engine is equipped with the appropriate sensors” with regard to OBD fuel injection monitoring, aligning the text with that used in GTR No. 5.

Presentation of issues raised during discussions of the GRE Task Force on EMC requirements with regard to the application of several UN Regulations to trolley buses depending upon their configuration (e.g., dual-mode operation either connected to overhead cables or in standard bus mode).

Proposal to introduce provisions to align UN R49 with recently introduced stage D EU legislation in order enable manufacturers to continue to utilize the provisions in paragraph 4 of Annex 9A to approve light commercial vehicles with a light duty OBD architecture under this regulation. This proposal incorporates all of the provisions of the latest amendment to EU legislation. As stage D is unrelated to OBD, the proposal is to make stage C and all subsequent stages equivalent to EOBD 6-2.

Proposal to correct and clarify the text, including to

1. correct the constants for equation (34) to calculate exhaust mass flow using carbon balance method,
2. correct constants used for CVS verification,
3. correct the formula for regression analysis according to Annex 4, Appendix 3, and
4. correct the rise time (to 3.5 s from 2.5 s) for the PEM analyzers under paragraph A.2.2.1. of the 06 series.

Comprehensive amendment of document GRPE/2017/6 to align UN R49 with the latest amendments of EU Euro VI legislation (Reg. EU 2016/1718), including

1. OBD equivalency option for light commercial vehicles to be continued with step ‘D’,
2. editorial corrections (incl. keeping optional THC PEMS measurement for gas engines),
3. implementation dates in Appendix 9 table 1 (2016/1718) and Annex 3 table 1 (R49),
4. implement rejection note for retroactive applicability with regard to in-service conformity (paragraph 13.4.),
clarification of type approval provisions for ‘new vehicle types as of 2017’,
5. deletion of infeasible requirement related to the PEMS test (“…void if … no valid windows left in urban only”), second part of sentence in Annex 8, Appendix 1: A1.4.2.2.2.2.
6. deletion of inconsistency between work based window and CO2 mass based method regarding valid integration windows (A.1.4.2.2.2.2. versus A.1.4.3.1.2.2).

Amendments from OICA to the proposal to introduce provisions to align UN R49 with recently introduced stage D EU legislation in order enable manufacturers to continue to utilize the provisions in paragraph 4 of Annex 9A to approve light commercial vehicles with a light duty OBD architecture under this regulation.

OICA proposal to include the alignment of the amendment of EU Euro VI legislation (Reg. EU 2014/133) into the Regulation No. 49 which has not been covered before. Reg. EU 2014/133 corrects applicability of OBD threshold levels (OTLs) to all types of vehicles covered by the regulation by removing the reference to vehicle classes and weights.

Proposal to improve the “random check requirement” and define the rounding of test results calculated according to Annex 4A in the 05 series of amendments.

Proposal to improve the Engine Control Unit (ECU) torque signal validation requirement in the 06 series of amendments to R49 with regard to dual-fuel or flex-fuel vehicles. Under the regulation, the ECU torque information can be calibrated only to one fuel’s heat value (usually the basic reference fuel) even though the heat value of the alternative fuel is different. In order to increase the accuracy of the torque values used for calculating the emission results during in-service conformity testing, OICA proposes to change the provisions to either:

1. Demonstrate that both fuels comply because the ODB system is able to detect the fuel used, or
2. Determine the torque deviation caused by the alternative fuel heat value compared to the standard fuel and apply this correction factor to calculate a more accurate power signal for the emission calculation.

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 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

Proposes to allow the use of nitrogen as batch gas for FID fuel gas and introduces the requirements for humidity sensors.

Proposal to correct and clarify the text and to introduce linearity requirements for humidity sensors to address humidity content measurement for the calculation of the specific exhaust emission.

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

Also applicable for R85

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

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

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

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

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

Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles and to introduce an option to measure the total hydrocarbon (THC) emissions instead of measuring the non-methane hydrocarbon emissions in certain cases.

Proposal aims to clarify the measurement data.

Proposal to delete the PEMS PM number from 06 series of amendments.

Proposal to maintain consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal for amendments to include OBFCM provisions

Proposal to reintroduce text that was unintentionally omitted in document GRPE/2025/12 as adopted by GRPE during its 92nd session.

Proposal to improve FTIR/QCL Analyser Examination (Para. 9.3.2.8.1, 9.3.2.9.1, 9.3.2.10, Appendices 10–11), including expanding the examination authority to include type-approval authorities and technical services, requiring witnessing of the testing at the instrument manufacturer’s facility, and introducing new appendices providing an examiner template and a verification certificate format, and to permit other techniques for the water quench check (Para. 9.3.2.9.9) to address the adverse effects of H₂O and CO₂ on the CLD’s NOx response and align with the provisions of 40 CFR 1065.750(e)(5).