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UN R41 Supplement 9 (04 series) · UNECE Regulation No. 41 (ECE R41) — Uniform provisions concerning the approval of motorcycles with regard to noise.

UN R41 — Supplement 9 to the 04 series of amendments

Supplement 8 → 9

Adopted at the WP.29 183rd sessionEntry into force 2021-09-30
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What changed
  • In Annex 3, the road surface covering of the test site must now conform only to ISO 10844:2014.
  • Annex 4 is now “Test track layout”, and its specifications for the test site in paragraphs 1. to 6.2. are deleted.
  • Paragraph 12.3. now covers type approvals according to any preceding series of amendments, and new paragraph 12.4. covers extensions of existing approvals.
Why
  • The purpose of the proposal is to align the 04 series of amendments with ISO 10844:2014.
  • As from 20 January 2021, the specifications for the test site in Annex 4 will not be valid any more.
  • In paragraph 12.4., a secretariat note says that the wording was adjusted in line with the decision of WP.29 at its November 2020 session.

Q1What changed113 changes

Road surface of the test site to ISO 10844:2014 (Annex 3, para. 1.2.1.)

The road surface covering of the test site must conform to ISO 10844:2014. Before this supplement, it had to conform to the requirements of Annex 4 or to ISO 10844:2014.

On the test site the variations in the free sound field between the sound source at the centre of the acceleration section and the microphone shall be maintained to within 1 dB(A). This condition will be deemed to be met if there are no large objects which reflect sound, such as fences, rocks, bridges or buildings, within 50 m of the centre of the acceleration section. The road surface covering of the test site shall conform to the requirements of Annex 4 or to ISO10844:2014.

Type approvals and extensions to a preceding series (paras. 12.3. and 12.4.)

Paragraph 12.3. now says that Contracting Parties may grant type approvals according to any preceding series of amendments. New paragraph 12.4. says that they must continue to grant extensions of existing approvals to any preceding series of amendments. In both paragraphs, the specification of the test track may conform to ISO 10844:2014. Before this supplement, paragraph 12.3. said that Contracting Parties must not refuse to grant extensions of approval in accordance with the preceding series of amendments. These extensions had to be conducted on the test site of Annex 4 or ISO 10844:2014. A new note by the secretariat says that the wording was adjusted in line with the decision of WP.29 at its November 2020 session.

Contracting Parties applying this Regulation shall not refuse to grant extensions of approval in accordance with the preceding series of amendments to this Regulation which shall be conducted on the test site of Annex 4 or ISO10844:2014.Contracting Parties applying this Regulation may grant type approvals according to any preceding series of amendments to this Regulation. However, the specification of the test track may conform to ISO10844:2014.
Contracting Parties applying this Regulation shall continue to grant extensions of existing approvals to any preceding series of amendments to this Regulation. However, the specification of the test track may conform to ISO10844:2014.
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Paragraphs 12.4. to 12.9. renumbered as 12.5. to 12.10.

Former paragraphs 12.4. to 12.9. are now paragraphs 12.5. to 12.10. Their text does not change.

12.4.12.5.
12.5.12.6.
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New title and Figure 1 (Annex 4)

The title of Annex 4 is now “Test track layout” instead of “Specifications for the test site”. The caption of Figure 1 is now “Test track layout with dimensions in meters”, and the figure is changed. A new key names the minimum area covered with test road surface, that is the test area, and the microphone positions. The old key text is deleted.

Specifications for the test siteTest track layout
Minimum requirements for test surface area. The shaded part is called "Test Area"Test track layout with dimensions in meters
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Specifications for the test site deleted (Annex 4, paras. 1. to 6.2.)

Annex 4 no longer has paragraphs 1. to 6.2. These paragraphs gave the required characteristics of the surface, the test surface design and the test method. They also gave the stability in time and maintenance, and the documentation of the test surface and of tests performed on it. Figure 2 and Table 1 are also deleted. The footnote to the title, the footnote to paragraph 1. and the footnote to paragraph 2.2. are deleted. One of them said that the test site specifications in this Annex were valid until the end of the period in paragraph 12.9.

Introduction
Required characteristics of the surface
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Q2Why it changed

Proposed by
Experts from the International Motorcycle Manufacturers Association (IMMA)
Working party
GRBP, 72nd session (September 2020)

Reasons

  • The proposal aims to align the 04 series of amendments with ISO 10844:2014. It removes the provisions carried over from ISO 10844:1998, but keeps Figure 1 of Annex 4 to explain the test track layout.

    Sources (2)
    “This proposal aims to align the 04 series of amendments to UN regulation No. 41 with ISO 10844:2014”
    “eliminating provisions which are carried over from ISO 10844:1998, except for Figure 1 of Annex 4 which is referred to as explanations of the test track layout”

  • As from 20 January 2021, the specifications for the test site in Annex 4 will not be valid any more. The provisions of ISO 10844:2014 will replace them. This date is 60 months after the entry into force of Supplement 3 to the 04 series of amendments.

    Sources (2)
    “As from 20 January 2021, the specifications for the test site reproduced in Annex 4 will not be valid anymore but will be substituted by the provisions of ISO10844:2014.”
    “The date of 20 January 2021 derives from 60 months after the entry into force of Supplement 3 to the 04 series of amendments”

  • IMMA wanted to replace the current Figure 1 of Annex 4 with a figure in higher resolution.

    Source
    “IMMA would like to replace the current Figure 1 of Annex 4 with the one in higher resolution.”

  • In paragraph 12.4., a secretariat note says that the wording was adjusted in line with the decision of WP.29 at its November 2020 session. The note refers to ECE/TRANS/WP.29/1155, paragraphs 92 and 93, and to informal document WP.29-182-11.

    Sources (2)
    “shall continue to grant extensions of existing approvals to any preceding series of amendments to this Regulation.1”
    “Note by the secretariat: the wording was adjusted in line with the decision of WP.29 at its November 2020 session (ECE/TRANS/WP.29/1155, paras. 92 and 93, and informal document WP.29-182-11).”

Document trail

  1. 2020-06ProposalECE/TRANS/WP.29/GRBP/2020/18Proposal by IMMA
  2. —Working party adoptsECE/TRANS/WP.29/GRBP/70Session report, para. 5
  3. 2020-12Sent to WP.29ECE/TRANS/WP.29/2021/4Text that GRBP sent to WP.29 and AC.1
  4. 2021-03WP.29 adoptsECE/TRANS/WP.29/1157Adopted at the 183rd session (session report, para. 137)
  5. 2021-09-30In forceC.N.312.2021.TREATIES-XI.B.16.41UN depositary notification

Q3Who is affected

Vehicle manufacturer

  • Check that the road surface covering of the test site for your approval tests conforms to ISO 10844:2014.
  • Check paragraphs 12.3. and 12.4. for type approvals and extensions according to a preceding series of amendments.
  • Update documents that quote former paragraphs 12.4. to 12.9., which are now paragraphs 12.5. to 12.10.

Component supplier

  • No direct action for this role.

Technical service / Approval authority

  • Check that the road surface covering of the test site conforms to ISO 10844:2014.
  • Do not use the deleted specifications for the test site of Annex 4 as a reference.
  • Note that, for approvals to a preceding series, the test track specification may conform to ISO 10844:2014 (paras. 12.3., 12.4.).

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

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