Title: Occupant responses in child restraint systems in side impact tests

Authors: Jia Hu, Koji Mizuno, Eiichi Tanaka, Shunsuke Takagi, Naruyuki Hosokawa, Yasuhiro Matsui, Hideki Yonezawa, Ryoichi Yoshida

Addresses: College of Mechanical and Automotive Engineering, Hunan University, Changsha, Hunan 410082, China. ' School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 4648603, Japan. ' School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 4648603, Japan. ' Automotive Safety Research Department, National Traffic Safety and Environment Laboratory, 74227 Jindaijihigashi-cho, Chofu, Tokyo 1820012, Japan. ' Automotive Safety Research Department, National Traffic Safety and Environment Laboratory, 74227 Jindaijihigashi-cho, Chofu, Tokyo 1820012, Japan. ' Automotive Safety Research Department, National Traffic Safety and Environment Laboratory, 74227 Jindaijihigashi-cho, Chofu, Tokyo 1820012, Japan. ' Automotive Safety Research Department, National Traffic Safety and Environment Laboratory, 74227 Jindaijihigashi-cho, Chofu, Tokyo 1820012, Japan. ' N Research Project, Takata Corporation, 658 Echigawa, Aisho-cho, Echi-gun, Shiga 5291388, Japan

Abstract: Accident data show that the injury risks to children seated in Child Restraint Systems (CRSs) are higher in side collisions than any other type. To investigate this, it is necessary to understand the occupant responses in various CRSs. While a sled test procedure has been discussed by the International Organisation for Standardisation for evaluating CRS performance, for which full car side impact tests were conducted with a Q3s child dummy seated in a Forward-Facing (FF) CRS, and a CRABI Six-Month-Old (6MO) infant dummy seated in a Rear-Facing (RF) CRS and also placed in car-bed restraint. In FF and RF CRS tests, the chest was loaded by an intruding door and the resulting chest deflection of the Q3s child dummy in the FF CRS was comparable with the Injury Assessment Reference Value (IARV). In tests with the FF and RF CRSs, the dummy heads were contained within the CRS shell during the entire impact event; and the HICs were small. Although all injury criteria of the CRABI 6MO infant dummy in the car-bed restraint were smaller than the IARVs, a calculated crotch harness force was large.

Keywords: child restraint systems; CRS; side impact; occupant protection; full car tests; vehicle safety; injury risk; children; occupant responses; crash injury criteria; crotch harness force; side collisions.

DOI: 10.1504/IJVS.2008.020076

International Journal of Vehicle Safety, 2008 Vol.3 No.1, pp.14 - 31

Published online: 25 Aug 2008 *

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