Method and apparatus for inflating an inflatable vehicle...

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/20 (2006.01) B60R 21/16 (2006.01) B60R 21/26 (2006.01) B60R 21/00 (2006.01) B60R 21/22 (1995.01)

Patent

CA 2141726

A method of inflating an inflatable vehicle occupant restraint (12) comprises the step of directing inflation fluid to flow into the restraint (12) to inflate the restraint (12) in a vehicle (11) between a vehicle seat (16) and a side portion of the vehicle (11), such as a vehicle door (18). The inflation fluid increases the internal fluid pressure of the restraint (12) toward a maximum internal fluid pressure as the inflation fluid flows into the restraint (12). The method further comprises the step of constraining the restraint (12) to resist inflating the restraint (12) during at least a portion of the step of directing inflation fluid into the restraint (12). The step of constraining the restraint (12) causes the restraint (12) to reach a constrained volume at which the internal fluid pressure is approximately 70-100% of the maximum internal fluid pressure at approximately 6-8 milliseconds after the inflation fluid begins to flow into the restraint (12).

Cette invention concerne une méthode de gonflage d'un dispositif de retenue (12) destiné à protéger les occupants d'un véhicule en cas de collision. La première étape consiste à acheminer le fluide de gonflage vers le dispositif (12) pour le gonfler à l'intérieur du véhicule équipé, entre un siège (16) et une partie latérale dudit véhicule (11), une portière (18) par exemple. Au cours de cette étape, le fluide de gonflage fait monter la pression à l'intérieur du dispositif (12) vers un maximum. La méthode prévoit par ailleurs de confiner le dispositif (12) de manière à s'opposer à son gonflement au moins durant au moins une partie de la première étape, soit l'acheminement du fluide de gonflage vers le dispositif (12). Le confinement du dispositif (12) a pour effet de contenir son volume à une valeur où la pression interne se situe entre environ 70 et 100 % de la pression interne maximale environ 6 à 8 millisecondes après la libération initiale du fluide de gonflage.

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