Request for guidance in order to resolve conflicting interpretations of paragraph 7.1.4.2.2. The paragraphs reads, " The vertical component of the acceleration from the abdomen towards the head shall not exceed 30 g except during periods whose sum does not exceed 3 ms.” However, an explanatory note for Technical Services on performing the tests under Annex 15 adds, "The wording of this paragraph [7.1.4.2.2.] refers to accelerations representing tensile loads in the spine of the dummy.” Differing interpretations have resulted in a CRS being approved but then rejected during Conformity of Production review by a separate Technical Service.
25. 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. The expert from CLEPA introduced GRSP-65-28 which superseded GRSP-65-20. Finally, GRSP adopted GRSP-65-28 as reproduced in Annex III of the session report. The secretariat was requested to submit GRSP-65-28 as Supplement 17 to the 04 series of amendments to UN Regulation No. 44, for consideration and vote at the November 2019 sessions of WP.29 and AC.1.
| GRSP-65-28 |