Two models of inflatable booster seat cushions were evaluated in the rear seats of motor vehicles undergoing full frontal 40 km/h to 48 km/h barrier tests with instrumented Hybrid III 6 and 10-year old ATDs. Kinematic responses of the ATDs were recorded with lateral and frontal high speed video views. Results of the crash tests were compared to the kinematic responses observed during similar crash testing of conventional booster seats as well as to the responses recorded during 48 km/h compliance sled tests (CMVSS 213.2). The combined effects of the compression of the inflatable cushion and routing of the lap and shoulder belt were found to contribute to the forward excursion and partial ejection of the dummy occupant from the booster seats when tested in the rear seats of passenger vehicles. The extent of seat cushion compression appeared to increase with dummy size and was significantly more pronounced for inflatable booster cushions than previously observed with conventional booster seats constructed with rigid shells. Both the 6 and 10-year-old ATDs exhibited forward excursions that were far greater than those observed during tests carried out on the compliance bench. The absence of belt retractors and the prescribed pre-loading of the belt, required by the North American compliance test methodologies may contribute to the masking of dynamic booster seat performance. Potential reasons for the observed differences are presented and the implications for the development of future test protocols to evaluate the performance of booster seats are discussed.
Dynamic responses of hybrid III 6 & 10-year-old ATDs seated on inflatable booster cushions
International Conference on Protection of Children in Cars, 10 ; Paper 22/1-Paper 22/17
2012
17 Seiten, 19 Bilder, 1 Tabelle, 3 Quellen
Conference paper
English
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