Crash performance evaluation of booster seats for an Australian car

Charlton, Judith L.; Fildes, Brian; Laemmle, Ron; Koppel, Sjaanie; Fechner, Liam; Moore, Kristen; Smith, Stuart; Douglas, Fiona; Doktor, Irena

Affiliations

¹Monash University Accident Research Centre, Australia

²Holden, Australia

Abstract

The aim of this study was to examine the relative effectiveness of two booster seats for use by children across a wide age span, from around 3 years to 10+ years. The study was part of a broad research program to identify suitable child restraint systems (CRS) to fit a large sedan vehicle to maximise protection in a crash. Dummies were restrained in the rear seat of a vehicle buck in three restraint configurations with boosters: (i) with a standard adult lap-sash seatbelt, (ii) with a seatbelt plus H-harness and crotch strap, or (iii) with a seatbelt plus Hharness with the crotch strap disengaged (to simulate the effects of real-world misuse conditions), and a fourth condition (iv) with an adult seatbelt only. Boosters were fitted in the vehicle with two different anchorage systems: a standard seatbelt and a system including a retrofitted rigid ISOFIX attachment and top tether. HyGe sled tests were conducted to simulate a 64 km/h offset deformable barrier frontal impact with a change in velocity of around 71 km/h. Preliminary investigations were also conducted using side impact simulations with a change in velocity of around 15 km/h. Overall, the booster seats for both the 6 year old dummy and the 3 year old dummy when a (with harness and crotch strap) provided superior crash protection than use of the adult seatbelt. For tests when the H-harness was used to restrain the dummy, use of the crotch strap was critical in eliminating ‘sub-marining’. The research highlighted the potential for serious injury with misuse of child harness systems and identified several areas for design improvement of booster seats.

Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv19/05-0425-O.pdf

Cited Works (4)

Year	Entry
2000	Winston FK, Durbin DR, Kallan MJ, Moll EK. The danger of premature graduation to seat belts for young children. Pediatrics. 2000;105(6):1179-1183.
2003	Winston FK, Chen IG, Arbogast KB, Elliott MR, Durbin DR. Shifts in child restraint use according to child weight in the United States from 1999 to 2002. In: 47th Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). September 22-24, 2003; Lisbon, Portugal.313-328.
2001	Paine M, Vertsonis H. Surveys of child restraint use in New South Wales. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.
1994	Henderson M, Brown J, Paine M. Injuries to restrained children. In: 38th Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). September 21-23, 1994; Lyon, France.75-87.

Cited By (1)

Year	Entry
2007	Charlton JL, Fildes B, Taranto D, Laemmle R, Smith S, Clark A. Performance of booster seats in side impacts: effect of adjacent passengers and isofix attachment. In: 51st Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). October 15-17, 2007; Melbourne, Australia.155-167.