Airbag system with biomechanical gray zones

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/01 (2006.01)

Patent

CA 2407572

A dual-stage inflator (52, 54) has squibs (48, 50) that can fire independently, simultaneously or in a delayed mode. This flexibility provides the ability to fire a low level, high level or staged delay level depending on the impact velocity or other parameters. For each restraint condition, the inflator output threshold speeds are identified. A biomechanical gray zone for each injury assessment reference value is defined based on vehicle occupant performance. The upper and lower bounds of each biomechanical gray zone are associated with a type of vehicle occupant, inflator output, belt restraint and injury parameter.

Un dispositif de gonflement en deux étapes (52, 54) possède des amorces (48, 50) qui peuvent se déclencher indépendamment, simultanément ou dans un mode retardé. Cette flexibilité permet de déclencher un niveau bas, un niveau élevé ou un niveau de retard étagé selon la rapidité de l'impact ou d'autres paramètres. Pour chaque condition de contrainte, les vitesses seuils de sortie du dispositif de gonflement sont identifiées. Une zone grise biomécanique pour chaque valeur de référence d'évaluation de blessure est définie en fonction de la performance de l'occupant du véhicule. Les bornes supérieure et inférieure de chaque zone grise biomécanique sont associées avec un type d'occupant de véhicule, une sortie de dispositif de gonflement, une contrainte de ceinture et un paramètre de blessure.

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