Gas generating apparatus for air bag apparatus and method...

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 21/26 (2006.01)

Patent

CA 2216864

The present invention relates to a gas generating apparatus for an air bag apparatus mounted in a vehicle or the like for protecting a passenger of the vehicle by charging a gas into an air bag interposed between the passenger and an interior member of the vehicle chamber so as to inflate the air bag at the time of collision of the vehicle. The gas generating apparatus for the air bag apparatus includes a first chamber 9 which accommodates a combustible fluid 7 and which is provided with a first vent opening 8 leading to the air bag 3; a second chamber 5 larger than the first chamber 9; a first occluding member 31 for occluding the first vent opening 8; and an ignition means 14 for igniting the combustible fluid in the first chamber 9. By burning at least a portion of the combustible fluid 7 within the first chamber 9, the fluid in the first and second chambers 9 and 5 is discharged through the first vent opening 8 to inflate the air bag 3. Therefore, the first occluding member is swiftly broken to discharge a mixture of the combustible fluid in the first chamber, it is possible to shorten the initial responding time period required to start inflating the air bag.

L'invention porte sur un dispositif produisant un gaz pour un coussin gonflable monté dans un véhicule, ou autre appareil semblable, afin de protéger un passager. L'appareil injecte un gaz dans un coussin gonflable, interposé entre le passager et un élément interne de la cabine du véhicule, de façon à gonfler le coussin gonflable au moment de la collision. Le dispositif produisant un gaz pour le coussin gonflable comporte : une première chambre 9 contenant un fluide combustible 7 et munie d'une première ouverture de ventilation 8 qui communique avec le coussin gonflable 3; une seconde chambre 5 plus grande que la première 9; un premier élément d'occlusion 31 bloquant la première ouverture de ventilation 8; et un élément d'allumage 14 pour allumer le fluide combustible dans la première chambre 9. En brûlant au moins une partie du fluide combustible 7 contenu dans la première chambre 9, le fluide dans les première et seconde chambres 9 et 5 est évacué par la première ouverture de ventilation 8 afin de gonfler le coussin gonflable 3. Ainsi, le premier élément d'occlusion est rapidement rompu pour relâcher un mélange de fluide combustible dans la première chambre. Il est donc possible de réduire le temps de réponse initial nécessaire pour commencer à gonfler le coussin gonflable.

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