UN R83 Supplement 18 (06 series) · UNECE Regulation No. 83 (ECE R83) — Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants according to engine fuel requirements.

UN R83 — Supplement 18 to the 06 series of amendments

Supplement 17 → 18

Adopted at the WP.29 188th sessionEntry into force 2023-06-05

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What changed: Under paragraph 9.3.5.1., the number of sample lots now depends on “the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation”. Before, it depended on the annual sales volume in the territories of a regional organization.
Under new paragraph 9.3.5.3., in-service conformity checks for the Type I test are not mandatory “if the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation was less than 5 000 vehicles for the previous year”.
Under paragraph 3.2.1.2. of Annex 11, a manufacturer may now disable “any specific OBD monitor for a given driving cycle”, instead of “the OBD system”, under the conditions of that paragraph.
Why: One proposal aims “to allow measurement equipment compliant with the technical requirements of UN Regulation No. 154 to be used for test to UN Regulations No. 83 and 101”.
Another proposal aims to correct the recursive formula, and aligns the approval certificate with recent changes to UN Regulation No. 24.
An informal proposal says that “it would be helpful to clarify that testing could be based on production volumes”. It also says that a threshold of vehicle sales for in-service testing “should be re-introduced”.

Q1What changed19 changes

Sample lots based on production volume (para. 9.3.5.1.)

Under paragraph 9.3.5.1., the number of sample lots now depends on “the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation”. This applies when the statistical procedure defined in Appendix 4 is used for tailpipe emissions. Before, it depended on the annual sales volume of an in-service family in the territories of a regional organization, for example the European Community. In the table, “Registrations per calendar year” is now “Production Volume”. The new table text also includes “per calendar year (for tailpipe emission tests)” and “of vehicles of an OBD family with IUPR in the sampling period”.

When applying the statistical procedure defined in Appendix 4 (i.e. for tailpipe emissions), the number of sample lots shall depend on the annual sales production volume of an in-service family intended for sales in the territories of a regional organization (e.g. European Community), contracting parties that apply this Regulation, as defined in the following table:.

Registrations per calendar year Up to 100 000 100 001 to 200 000 Above 200 000 Production Volume - per calendar year (for tailpipe emission tests), - of vehicles of an OBD family with IUPR in the sampling period Up to 100,000 100,001 to 200,000 Above 200,000

When in-service conformity checks for the Type I test are not mandatory (para. 9.3.5.3.)

Under new paragraph 9.3.5.3., in-service conformity checks for the Type I test (for tailpipe emissions) are not mandatory “if the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation was less than 5 000 vehicles for the previous year”.

In-service conformity checks for the Type I test (i.e. for tailpipe emissions) shall not be mandatory if the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation was less than 5 000 vehicles for the previous year.

Disablement of specific OBD monitors (Annex 11, para. 3.2.1.2.)

Under paragraph 3.2.1.2. of Annex 11, a manufacturer may now disable “any specific OBD monitor for a given driving cycle”, instead of “the OBD system”, under the conditions of that paragraph. The temperature condition is now “ambient or engine temperatures below 266 K (-7° C)”, instead of “ambient engine starting temperatures below 266 K (-7° C)”. The condition “at elevations over 2,500 metres above sea level” and the data and/or engineering evaluation that the manufacturer submits stay the same. A manufacturer may also request disablement of any specific OBD monitor “at other ambient temperatures or other elevations”, “if they demonstrate to the authority with data and/or an engineering evaluation that misdiagnosis would occur under such conditions”. Before, the request was for disablement of the OBD system “at other ambient engine starting temperatures”.

A manufacturer may disable the any specific OBD system at monitor for a given driving cycle for ambient or engine starting temperatures below 266 K (-7° C) or at elevations over 2,500 metres above sea level provided the manufacturer submits data and/or an engineering evaluation which adequately demonstrate that monitoring would be unreliable when such conditions exist. A manufacturer may also request disablement of the any specific OBD system monitor at other ambient engine starting temperatures or other elevations if he demonstrates they demonstrate to the authority with data and/or an engineering evaluation that misdiagnosis would occur under such conditions. Misdiagnosis would occur under such conditions. It is not necessary to illuminate the malfunction indicator Malfunction Indicator (MI) if the OBD thresholds are exceeded during a regeneration provided no defect is present.

Test equipment that complies with UN Regulation No. 154 (Annexes 4a and 7)

Annex 4a and Annex 7 now have new text for “test and measurement equipment that is compliant with the technical requirements of UN Regulation No. 154 original series or later version”. For this equipment, “the requirements on the technical equipment described in UN Regulation No. 154 may be followed”. In all other cases, “the following requirements shall apply”. Appendix 6 to Annex 4a adds: “In case of the equipment that meets UN Regulation No. 154 requirements, this application may not be required”.

For test and measurement equipment that is compliant with the technical requirements of UN Regulation No. 154 original series or later version, the requirements on the technical equipment described in UN Regulation No. 154 may be followed, in all other cases the following requirements shall apply:

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Heading and reference wording (Annexes 4a and 7)

The headings of paragraph 1.1. of Appendix 1 and paragraph 1.2. of Appendix 2 to Annex 4a now read “General requirements”, instead of “General Requirements”. In Annex 7, the reference for the chassis dynamometer requirements now reads “Appendix 1 to Annex 4a to this Regulation”, instead of “Appendix 1 of Annex 4a”.

General Requirementsrequirements

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Recursive formulae for the test statistic (Appendix 2, para. 6.)

Paragraph 6. of Appendix 2 gives recursive formulae that are useful for computing successive values of the test statistic. In the formula for Vn², the last term is now (d̄n − dn)² divided by (n − 1). Before, the square applied to the whole fraction (d̄n − dn)/(n − 1).

\\begin{array}{l}\overline{d}_{n}=\left(1-\frac{1}{n}\right)\overline{d}_{n-1}+\frac{1}{n}d_{n}\\V_{n}^{2}=\left(1-\frac{1}{n}\right)V_{n-1}^{2}+\left[\frac{\left(\overline{d}_{n}-d_{n}\right)^{2}}{n-1}\right]^{2}\\(n=2,3}\\\left(n=2,3,\ldots;\ qquad\overline{d}_{1\overline{d}_{1}=d_{1};\ quad V_{1}=0\quad0\right)\end{array}

Smoke opacity test results (Annex 2, para. 2.4.)

Paragraphs 2.4.1. and 2.4.2.1. now include “(if any)”: the technical service test report number at steady speeds and the measured value of the absorption coefficient. The smoke opacity footnote now reads “Smoke opacity values according to provisions laid out in UN Regulation No. 24”. Before, it read “Smoke opacity measurements to be carried out according to provisions laid out in Regulation No. 24”.

At steady speeds: See technical service test report number (if any):

Measured value of the absorption coefficient: (if any): .m-1

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Q2Why it changed

Proposed by: Expert from the International Organization of Motor Vehicle Manufacturers
Working party: GRPE, 86th session (May–June 2022)

Reasons

One proposal aims “to allow measurement equipment compliant with the technical requirements of UN Regulation No. 154 to be used for test to UN Regulations No. 83 and 101”. It says that the UN Regulation No. 154 equipment has been updated and regulated based on the UN Regulation No. 83 equipment. OICA would like to make the proposals “in consideration of further operational efficiency”.
Sources (3)
“This document aims to allow measurement equipment compliant with the technical requirements of UN Regulation No. 154 to be used for test to UN Regulations No. 83 and 101.”
ECE/TRANS/WP.29/GRPE/2022/13introduction
“In fact, the UN Regulation No. 154 equipment has been updated and regulated based on the UN Regulation No. 83 equipment”
ECE/TRANS/WP.29/GRPE/2022/13II. Justification, para. 2
“For OICA as well, we would like to make the following proposals in consideration of further operational efficiency.”
ECE/TRANS/WP.29/GRPE/2022/13II. Justification, para. 1
Another proposal addresses the correction of the recursive formula for Vn in paragraph 6. of Appendix 2.
Source
“This proposal addresses the correction of the recursive formula for Vn of paragraph 6. in Appendix 2 of the 05, 06 and 07 series of amendments of UN Regulation No. 83.”
ECE/TRANS/WP.29/GRPE/2022/10II. Justification, para. 1
The same proposal aligns the approval certificates of the 06 and 07 series of amendments with the latest changes to UN Regulation No. 24.
Source
“This proposal aligns the approval certificates of the 06 and 07 series of amendments to UN Regulation No. 83 with the latest changes to UN Regulation No. 24.”
ECE/TRANS/WP.29/GRPE/2022/10II. Justification, para. 2
Proposer's reason (informal document GRPE-86-24-Rev.1)
An informal proposal says that many Contracting Parties do not have monitoring of vehicle registrations. Also, manufacturers have difficulties obtaining accurate information from importers and sales companies. So “it would be helpful to clarify that testing could be based on production volumes”. It also says that the 05 series of amendments contained “a threshold of vehicle sales below which no ISC testing was necessary”. This threshold “does not appear for Type 1 testing in the 06 or 07 series of amendments”. As it is very difficult to source vehicles with low sales, “this threshold should be re-introduced”.
Submitted by Expert from OICA. Working party adoption: ECE/TRANS/WP.29/GRPE/86, para. 22.
Sources (3)
“As many Contracting Parties do not have monitoring of vehicle registrations, and manufacturers have difficulties obtaining accurate information from importers and sales companies, it would be helpful to clarify that testing could be based on production volumes.”
GRPE-86-24-Rev.1II. Justification, para. 1
“The 05 series of amendments contained a threshold of vehicle sales below which no ISC testing was necessary.”
GRPE-86-24-Rev.1II. Justification, para. 2
“As it is very difficult to source vehicles from vehicles with low sales, this threshold should be re-introduced.”
GRPE-86-24-Rev.1II. Justification, para. 2
Proposer's reason (informal document GRPE-86-12)
Another informal proposal says that the altitude of 2500 m in paragraph 3.2.1.2. of Annex 11 “should remain unchanged”. This “permits continuity of existing approvals to UN Regulation No. 83 whilst being covered by the value of 2400m in UN Regulation No. 154”. Other than this altitude, it aligns the UN Regulation No. 83 text with UN Regulation No. 154, “thus enabling harmonized development of OBD systems”.
Submitted by Experts from OICA. Working party adoption: ECE/TRANS/WP.29/GRPE/86, para. 22.
Sources (2)
“The altitude of 2500m in paragraph 3.2.1.2. should remain unchanged. This permits continuity of existing approvals to UN Regulation No. 83 whilst being covered by the value of 2400m in UN Regulation No. 154.”
GRPE-86-12II. Justification, para. 3
“Other than the altitude mentioned above, this proposal aligns the text of UN Regulation No. 83 with that of UN Regulation No. 154, thus enabling harmonized development of OBD systems.”
GRPE-86-12II. Justification, para. 4

Document trail

2022-03ProposalECE/TRANS/WP.29/GRPE/2022/10Proposal by the expert from OICA on the recursive formula and the approval certificate
2022-03ProposalECE/TRANS/WP.29/GRPE/2022/13Proposal by the expert from OICA on measurement equipment compliant with UN Regulation No. 154
—Amended in sessionGRPE-86-12Additional content in ECE/TRANS/WP.29/GRPE/2022/10, with changes to the OBD chapter
—Amended in sessionGRPE-86-24-Rev.1Informal proposal by the expert from OICA on sampling of vehicles for in-service conformity testing
—Working party adoptsECE/TRANS/WP.29/GRPE/86GRPE adopted the proposals, as combined in Annex V, and asked for their submission as a draft new supplement to the 06 series
2022-08Sent to WP.29ECE/TRANS/WP.29/2022/135Text that GRPE sent to WP.29 and AC.1
2022-11WP.29 adoptsECE/TRANS/WP.29/1168Adopted at the 188th session (session report, para. 138)
2023-06-05In forceC.N.170.2023.TREATIES-XI.B.16.83UN depositary notification

Q3Who is affected

Vehicle manufacturer

For the Appendix 4 statistical procedure (tailpipe emissions), check the number of sample lots against “the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation” (paragraph 9.3.5.1.).
For the Type I test (tailpipe emissions), check if “the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation was less than 5 000 vehicles for the previous year”: then in-service conformity checks are not mandatory (paragraph 9.3.5.3.).
To disable “any specific OBD monitor for a given driving cycle” for “ambient or engine temperatures below 266 K (-7° C) or at elevations over 2,500 metres above sea level”, submit “data and/or an engineering evaluation which adequately demonstrate that monitoring would be unreliable when such conditions exist” (Annex 11, paragraph 3.2.1.2.).
To request disablement of “any specific OBD monitor” at “other ambient temperatures or other elevations”, demonstrate “to the authority with data and/or an engineering evaluation that misdiagnosis would occur under such conditions” (Annex 11, paragraph 3.2.1.2.).

Component supplier

Be ready to give the vehicle manufacturer data and/or an engineering evaluation to disable “any specific OBD monitor for a given driving cycle” (Annex 11, paragraph 3.2.1.2.).

Technical service / Approval authority

Be ready for requests to disable “any specific OBD monitor” at “other ambient temperatures or other elevations” (Annex 11, paragraph 3.2.1.2.).
For the Appendix 4 statistical procedure (tailpipe emissions), be ready for sample lot numbers based on “the annual production volume of an in-service family intended for sales in the contracting parties that apply this Regulation” (paragraph 9.3.5.1.).
Be ready for “test and measurement equipment that is compliant with the technical requirements of UN Regulation No. 154 original series or later version” (Annexes 4a and 7).
If you use the recursive formulae for the test statistic, update the formula for Vn² to the new text.

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ⓘ This report gives advice only. It is not legal or type-approval advice.