UN R44 — Supplement 17 to the 04 series of amendments

Q1What changed4 changes

Q2Why it changed

Proposed by

Expert from the European Association of Automotive Suppliers

Working party

GRSP, 65th session (May 2019)

Reasons

• At GRSP, the expert from Germany introduced a document to clarify the direction of the vertical component of the chest acceleration. The aim was consistency in the tests that different Technical Services perform on Child Restraint Systems under paragraph 7.1.4.2.2.

  Sources (2)

  “The expert from Germany introduced GRSP-65-20 aimed at introducing clarifications on the direction of the vertical component of the chest acceleration”

  “to provide consistency on the test performed by different Technical Services on Child Restraint Systems in accordance to paragraph 7.1.4.2.2. of the UN Regulation”

• Proposer's reason (informal document GRSP-65-28)

  The clarification addresses the concern raised by Germany (GRSP-65-20) that the assessment was not applied consistently by all test labs. A Child Restraint System passed the paragraph 7.1.4.2.2. test during approval but failed the same test during COP measures. The approval test and the COP measure were not carried out by the same technical services. It clarifies the sign convention of dummy instrumentation so that the correct direction of chest vertical acceleration is measured and assessed in the dynamic test.

  Submitted by Expert from the European Association of Automotive Suppliers. Working party adoption: ECE/TRANS/WP.29/GRSP/65, para. 25.

  Sources (4)

  “This clarification addresses the concern raised by Germany (GRSP-65-20) that the assessment was not applied consistently by all test labs.”

  “During approval procedure a Child Restraint Systems had passed the test according section 7.1.4.2.2. , anyhow that Child Restraint System failed the same test during COP measures.”

  “Approval test and COP measure were not carried out by the same technical services.”

  “This proposal clarifies the sign convention of the dummies’ instrumentation to ensure the correct direction of chest vertical acceleration is measured and assessed during the dynamic test.”

Document trail

1. —ProposalGRSP-65-28Proposal by the expert from CLEPA, which superseded GRSP-65-20
2. —Working party adoptsECE/TRANS/WP.29/GRSP/65GRSP session report, para. 25: GRSP adopted GRSP-65-28 as reproduced in Annex III
3. 2019-08Sent to WP.29ECE/TRANS/WP.29/2019/108Text that GRSP sent to WP.29 and AC.1
4. 2019-11WP.29 adoptsECE/TRANS/WP.29/1149Adopted at the 179th session (session report, para. 116)
5. 2020-05-29In forceC.N.237.2020.TREATIES-XI.B.16.44UN depositary notification

Q3Who is affected