Proposal to amend the provisions of Annexes 9B and 9C (with respect to the on-board diagnostic communication protocol) and to clarify some concerns identified during the preparation of legislation implementing the Euro VI emission levels.
| Reference Number: | WP.29/2011/124 |
| Meeting Session(s): | 155th WP.29 session (15-18 Nov 2011) |
| Document date: | 29 Aug 11 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2011/124) was adopted by the World Forum. Thirty-two Contracting Parties out of the 40 applying UN R49 were present for the vote by AC.1. Thirty-two voted in favor with zero against and zero abstaining. | |
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Proposal as approved by the GRPE to introduce type-approval provisions for vehicles equipped with LNG propulsion systems and to extend the pollutant emission requirements of the regulation to dual-fuel heavy duty engines and vehicles.
| Reference Number: | WP.29/2013/111 |
| Meeting Session(s): | 161st WP.29 session (12-15 Nov 2013) |
| Document date: | 23 Jul 13 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
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| Reference Number: | WP.29/2010/54/Rev.1 |
| Meeting Session(s): | 150th WP.29 session (9-12 Mar 2010) |
| Document date: | 18 Feb 10 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| View full document file for more information | |
| Reference Number: | WP.29/2010/51 |
| Meeting Session(s): | 150th WP.29 session (9-12 Mar 2010) |
| Document date: | 22 Dec 09 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions | GTR No. 4 WHDC |
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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 %.
Annex 4B – Amendments to paragraph 9.3.3.1In 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.
| Reference Number: | GRPE-82-24 |
| Submitted by: | OICA |
| Meeting Session(s): | 82nd GRPE session (12-15 Jan 2021) |
| Document date: | 11 Jan 21 |
| Document status: | Informal GR review |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
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| Reference Number: | WP.29/2010/128 |
| Meeting Session(s): | 152nd WP.29 session (9-12 Nov 2010) |
| Document date: | 19 Jul 10 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2010/128) was adopted by the World Forum. Thirty-two Contracting Parties out of the 39 applying UN R49 were present for the vote by AC.1. Thirty-two voted in favor with zero against and zero abstaining. | |
The scope of EU Euro VI standards for heavy-duty vehicles has been expanded compared with Euro V. In order to prevent inconsistencies that could affect the ability to offer all vehicles for export, this proposal would apply the expanded scope retrospectively to the 05 series of amendments to UN R49. This proposal was adopted by the Working Party on Pollution and Energy (GRPE) at its 68th session based on document GRPE/2014/6, not amended.
| Reference Number: | WP.29/2014/39 |
| Meeting Session(s): | 163rd WP.29 session (24-27 Jun 2014) |
| Document date: | 01 Apr 14 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
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Proposal to align the requirements related to measurement equipment linearity verification in Regulation No. 49 to the provisions in Regulation No. 96.
| Reference Number: | WP.29/2016/40 |
| Meeting Session(s): | 169th WP.29 session (21-24 Jun 2016) |
| Document date: | 08 Apr 16 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2016/40) was adopted by the World Forum. Thirty-five Contracting Parties out of the 43 applying UN R49 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining. | |
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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.
| Reference Number: | WP.29/2018/46 |
| Meeting Session(s): | 175th WP.29 session (18-22 Jun 2018) |
| Document date: | 05 Apr 18 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2018/46) was adopted by the World Forum. Thirty-three Contracting Parties out of the 45 applying UN R49 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining. | |
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Proposal to correct and clarify the text, including to
| Reference Number: | WP.29/2017/129 |
| Meeting Session(s): | 173rd WP.29 session (14-17 Nov 2017) |
| Document date: | 25 Aug 17 |
| Document status: | Adopted text published |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2017/129) was adopted by the World Forum. Thirty-three Contracting Parties out of the 44 applying UN R49 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining. | |
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Proposal from GRPE to correct and improve provisions with respect to humidity and hydrocarbon measurements.
| Reference Number: | WP.29/2021/129 |
| Meeting Session(s): | 185th WP.29 session (23-26 Nov 2021) |
| Document date: | 08 Sep 21 |
| Document status: | Adopted by WP.29 |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| Adoption Vote | |
| This proposal (WP.29/2021/129) was adopted by the World Forum. Thirty-five Contracting Parties out of the 47 applying UN R49 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining. | |
| View full document file for more information | |
Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles.
| Reference Number: | WP.29/2024/45 |
| Meeting Session(s): | 193rd WP.29 session (24-28 Jun 2024) |
| Document date: | 09 Apr 24 |
| Document status: | Adopted by WP.29 |
| Regarding: | UN R49 Diesel/CNG/LNG Engine Emissions |
| View full document file for more information | |