Patent ID: 8960718
Filing Date: 2015-02-24
Classification: B60R,F42B

Abstract:
1. A gas generator for inflation of an airbag, the gas generator comprising: a case; a combustion chamber enclosed by the case, the combustion chamber containing at least one pyrotechnic charge able to be ignited by an initiator; a diffusion chamber enclosed by the case, the diffusion chamber having at least one communication orifice with an exterior able to receive gases coming from combustion of the charge and evacuate gases towards the exterior; a storage chamber; and a material stored in the storage chamber, the material able to be released from the storage chamber under effect of the combustion of the pyrotechnic charge to change state endothermically under effect of gases coming from the combustion, then to be evacuated via the diffusion chamber, the material being a liquid stored at atmospheric pressure; wherein the storage chamber includes at least one inlet opening and at least one outlet opening, the inlet and outlet openings normally being sealed in absence of combustion of the charge, the storage chamber separated from the diffusion chamber by a fixed wall through which are arranged the at least one outlet opening, wherein the charge and the combustion and diffusion chambers are dimensioned such that under effect of the combustion, at least one portion of a flow of gas generated by the pyrotechnic charge opens the at least one inlet opening and penetrates into the storage chamber, thereby provoking escape of the material via the at least one outlet opening, then endothermic change of state of the material, mainly in the diffusion chamber, wherein the diffusion chamber is between the combustion chamber and the storage chamber.