by The Stapp Association in United States
In France, as in other countries, accident research studies show that a large proportion of restrained occupants who sustain severe or fatal injuries are involved in frontal impacts (65% and 50%, respectively). In severe frontal impacts with restrained occupants and where intrusion is not preponderant, the oldest occupants very often sustain severe thoracic injuries due to the conventional seat belt. As we have been observing over the last years, we will expect in the coming years developments which include more solidly-built cars, as offset crash test procedures are widely used to evaluate the passive safety of production vehicles. The reduction of intrusion for the most severe frontal impacts, through optimization of car deformation, usually translates into an increase in restraint forces and hence thoracic injury risk with a conventional retractor seat belt for a given impact severity. It is, therefore essential to limit the restraint forces exerted by the seat belt on the thorax in order to reduce the number of road casualties.In order to address thoracic injury risk in frontal impact, Renault cars have…
by National Highway Traffic Safety Administration in United States
The first part of this study endeavors to show that the design of the inter-spinal notch of the pelvises of impact test dummies is unrealistic and can therefore not be expected to reproduce satisfactorily the interaction between the seat belt and the child's pelvis. This part of the study leads to a shape and position recommendation for each dummy weight group. Part two attempts to define the crushing force pattern for the thighs and abdomen of children based on seat belt static compression tests. These recommendations led to modification of a TNO P-series dummy. To measure forces in the abdomen during impa predict a dummy injury risk, a load cell is placed just above the iliac cress of the modified pelvis. Tests performed with the modified dummy highlight the need to equip all boosters with side strap guides by illustrating the phenomenon of submarining for those boosters lacking such guides. To help the booster designer position satisfactorily the strap guides integral with the booster, an installation zone is recommended with reference to the 3-year child…
by ISATA - Dusseldorf Trade Fair in United Kingdom
About 1000 children are killed in Europe each year in cars. 5,000 are severely injured. An accidentological study made by Renault on fatal car accidents in France indicates that 38% of children of less than 4 years killed in vehicles are involved in frontal impact and 29% in lateral impact. This study also shows that 79% of children killed in frontal impact could be saved by a good restraint system, and that this number would be 40% in lateral impact.In Sweden, rearward-facing child seats have been used for over 20 years, and the accident experience is very positive, with very low fatality rates for this age group. When a new model of the Volvo rearward-facing child seat for children up to three years (group 0 and 1) was planned, it was decided to develop it also for Renault car models.As far as frontal impact is concerned, a conclusion from an International Task Force on Child Restraint Systems (ITFCRS), as well as Swedish experience, show that is was absolutely necessary to carry children of less than…
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