The present invention provides a gas generator including an ignition device provided at one end of a cylindrical housing and a diffuser portion having a gas discharge port and provided at the other end of the housing,molded articles of a gas generating agent and a molded article of a pressure increa
The present invention provides a gas generator including an ignition device provided at one end of a cylindrical housing and a diffuser portion having a gas discharge port and provided at the other end of the housing,molded articles of a gas generating agent and a molded article of a pressure increasing agent charged into a combustion chamber inside the cylindrical housing,the molded articles of a gas generating agent charged into a charging space remained except for a charging portion for the molded article of a pressure increasing agent inside the combustion chamber such that the molded articles of a gas generating agent are in contact with the ignition device and a total volume of the molded articles of a gas generating agent is less than a volume of the charging space,the molded article of a pressure increasing agent charged in contact with the molded articles of a gas generating agent at a position axially distant from the ignition device,a combustion temperature of the molded articles of a gas generating agent being 1000° C. to 1700° C., and a combustion temperature of the molded article of a pressure increasing agent being higher than that of the molded articles of a gas generating agent,a charged mass of the molded articles of a gas generating agent being larger than a charged mass of the molded article of a pressure increasing agent, andthe molded article of a pressure increasing agent being to burn out before burnout of the molded articles of a gas generating agent at the time of actuation.
대표청구항▼
1. A gas generator, comprising: an ignition device provided at one end of a cylindrical housing and a diffuser portion having a gas discharge port and provided at the other end of the housing,molded articles of a gas generating agent and a molded article of a pressure increasing agent charged into a
1. A gas generator, comprising: an ignition device provided at one end of a cylindrical housing and a diffuser portion having a gas discharge port and provided at the other end of the housing,molded articles of a gas generating agent and a molded article of a pressure increasing agent charged into a combustion chamber inside the cylindrical housing,the combustion chamber being a space inside the cylindrical housing excluding the ignition device and the diffuser portion,the molded articles of a gas generating agent being charged, in a charging space remained except for a charging portion for the molded article of a pressure increasing agent inside the combustion chamber, such that the molded articles of a gas generating agent is in contact with the ignition device and a total volume of the molded articles of a gas generating agent is less than a volume of the charging space,the molded article of a pressure increasing agent being charged in contact with the molded articles of a gas generating agent at a position axially distant from the ignition device in the combustion chamber,a combustion temperature of the molded articles of a gas generating agent being 1000° C. to 1700° C., and a combustion temperature of the molded article of a pressure increasing agent being higher than that of the molded articles of a gas generating agent,a charged mass of the molded articles of a gas generating agent being larger than a charged mass of the molded article of a pressure increasing agent, andthe molded article of a pressure increasing agent being to burn out before burnout of the molded articles of a gas generating agent at the time of actuation. 2. The gas generator according to claim 1, wherein the total volume (V1)of the molded articles of a gas generating agent and the volume (V2) of the charging space of the molded articles of a gas generating agent satisfy the relationship V1/V2=0.50 to 0.90 when the molded articles of a gas generating agent do not have a through hole. 3. The gas generator according to claim 1, wherein the molded article of a pressure increasing agent is charged between a position at a distance of 1/3L from the ignition device and the diffuser portion, where L stands for the length of the combustion chamber. 4. The gas generator according to claim 1, wherein, inside the combustion chamber,the molded article of a pressure increasing agent is charged such as to form a disk abutting against the inner circumferential surface of the cylindrical housing, andthe molded articles of a gas generating agent are charged into one or two remaining columnar spaces. 5. The gas generator according to claim 1, wherein a filter is disposed between the combustion chamber and the diffusion portion. 6. The gas generator according to claim 1, wherein the molded articles of a gas generating agent and the molded article of a pressure increasing agent are different from each other in at least one of shape, size, composition and composition ratio. 7. A gas generator, comprising: an ignition device provided at one end of a cylindrical housing and a diffuser portion having a gas discharge port and provided at the other end of the housing,molded articles of a gas generating agent and a molded article of a pressure increasing agent charged into a combustion chamber inside the cylindrical housing,the combustion chamber being a space inside the cylindrical housing excluding the ignition device and the diffuser portion,the molded articles of a gas generating agent being charged, in a charging space remained except for a charging portion for the molded article of a pressure increasing agent inside the combustion chamber, such that the molded articles of a gas generating agent is in contact with the ignition device and a total volume of the molded articles of a gas generating agent is less than a volume of the charging space,the molded article of a pressure increasing agent being charged in the end portion of the combustion chamber opposite the ignition device, and the molded article of a pressure increasing agent and the molded articles of a gas generating agent being separated by a partition wall,the partition wall being selected from a partition wall formed of a metal that is melted and deformed by heat at the time of actuation, a partition wall that is burned by heat at the time of actuation, a partition wall that is not melted or deformed by heat at the time of actuation but has ports,a combustion temperature of the molded articles of a gas generating agent being 1000° C. to 1700° C., and a combustion temperature of the molded article of a pressure increasing agent being higher than that of the molded articles of a gas generating agent,a charged mass of the molded articles of a gas generating agent being larger than a charged mass of the molded article of a pressure increasing agent, andthe molded article of a pressure increasing agent being to burn out before burnout of the molded articles of a gas generating agent at the time of actuation. 8. The gas generator according to claim 7, wherein the total volume (V1) of the molded articles of a gas generating agent and the volume (V2) of the charging space of the molded articles of a gas generating agent satisfy the relationship V1/V2=0.50 to 0.90 when the molded articles of a gas generating agent do not have a through hole. 9. The gas generator according to claim 7, wherein the molded article of a pressure increasing agent is charged between a position at a distance of 1/3L from the ignition device and the diffuser portion, where L stands for the length of the combustion chamber. 10. The gas generator according to claim 7, wherein, inside the combustion chamber,the molded article of a pressure increasing agent is charged such as to form a disk abutting against the inner circumferential surface of the cylindrical housing, andthe molded articles of a gas generating agent are charged into one or two remaining columnar spaces. 11. The gas generator according to claim 7, wherein the molded articles of a gas generating agent and the molded article of a pressure increasing agent are different from each other in at least one of shape, size, composition and composition ratio.
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