IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0448132
(2003-05-30)
|
우선권정보 |
JP-2002-158961(2002-05-31); JP-2002-365161(2002-12-17) |
발명자
/ 주소 |
- Iwakiri,Toshiro
- Miyaji,Katsuhito
|
출원인 / 주소 |
- Daicel Chemical Industries, Ltd.
|
대리인 / 주소 |
Birch, Stewart, Kolasch &
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
The invention provides a downsized gas generator for a passenger side air bag, which can supply a gas to the bag in at the time at which reaction force is most needed for restraining a vehicle occupant to be protected. The gas generator comprises a housing having a gas discharging port, an igniter t
The invention provides a downsized gas generator for a passenger side air bag, which can supply a gas to the bag in at the time at which reaction force is most needed for restraining a vehicle occupant to be protected. The gas generator comprises a housing having a gas discharging port, an igniter to be activated by an impact, and a molded article of a gas generating agent to be ignited and burnt by the igniter for generating a combustion gas, wherein one, two, or three requirements selected from the following (a), (b), and (c) are met: (a) an internal volume of a gas generator is 200 to 400 cm3; (b) a ratio L/D of an axial length L of a gas generator to a diameter D is 0.6 to 1.5; and (c) an amount of gas of a molded article of a gas generating agent is 1.5 to 4.5 mol.
대표청구항
▼
The invention claimed is: 1. A gas generator for an air bag, comprising: a housing having a gas discharging port; ignition means to be activated upon an impact; and a molded article of a gas generating agent to be ignited and burnt by the ignition means for generating a combustion gas, wherein at l
The invention claimed is: 1. A gas generator for an air bag, comprising: a housing having a gas discharging port; ignition means to be activated upon an impact; and a molded article of a gas generating agent to be ignited and burnt by the ignition means for generating a combustion gas, wherein at least one of three requirements selected from the following (a), (b) and (c) are met such that a time, between a peak of an inner pressure generated in the gas generator and subsequent lowering of the inner pressure to one-fourth its peak value, is not less than 45 milliseconds when the gas generator is activated at room temperature: (a) an internal volume of a gas generator is 200 to 400 cm 3; (b) a ratio (L/D) of an axial length (L) of the gas generator to a diameter (D) of the gas generator is 0.6 to 1.5; and (c) an amount of gas generated by combustion of the molded article of a gas generating agent is 1.5 to 4.5 mol. 2. The gas generator for an air bag as claimed in claim 1, wherein the axial length (L) of the gas generator is 50 to 100 mm. 3. The gas generator for a passenger side air bag as claimed in claim 1, wherein the housing includes a diffuser shell having the gas discharging port and a closure shell, and a ratio of an axial length (L 2) of the closure shell to an axial length (L1) of the diffuser shell is 0.5 to 1.5. 4. The gas generator for a passenger side air bag as claimed in claim 1, wherein the housing includes a diffuser shell having the gas discharging port and a closure shell, and a ratio (D2/D1) of a diameter (D2) of the closure shell to a diameter (D1) of the diffuser shell is 0.8 to 1.2. 5. The gas generator for an air bag as claimed in claim 1, wherein the housing includes a diffuser shell and a closure shell that are provided with a flange extending outwardly in a radial direction formed at open ends of circumferential walls thereof, respectively. 6. The gas generator for an air bag as claimed in claim 1, wherein a minimum thickness (W) of the molded article is 0.8 to 2.2 mm. 7. The gas generator for an air bag as claimed in claim 1, wherein the molded article has a perforation. 8. The gas generator for an air bag as claimed in claim 1, wherein the housing includes a plurality of molded articles having a total surface area (A) and is formed with a plurality of gas discharging ports, and a ratio (A/At) between the total surface area (A) and a total area (At) of the plurality of gas discharging ports is 500 to 1,000. 9. The gas generator for an air bag as claimed in claim 1, wherein the housing includes a plurality of molded articles and is formed with a plurality of gas discharging ports, and a ratio between a total area (At) of gas discharging ports and an amount of gas generated by combustion of the plurality of molded articles is 0.3 to 1.0 cm2 /mol. 10. The gas generator for an air bag as claimed in claim 1, wherein the housing includes a plurality of molded articles, and a ratio between a total surface area (A) of molded articles and an amount of gas generated by combustion of the molded articles is 350 to 650 cm2 /mol. 11. An air bag apparatus, comprising: a gas generator; an impact sensor detecting an impact to activate the gas generator; an air bag; and a module case accommodating the air bag, wherein the gas generator for an air bag is the gas generator according to claim 1. 12. A method of generating a gas from a gas generator for an air bag, comprising: providing a housing having a gas discharging port; providing ignition means within the housing for activating the gas generator upon an impact; providing, within the housing, a molded article of a gas generating agent to be ignited and burnt by the ignition means for generating a combustion gas; meeting at least one of three requirements selected from the following (a), (b) and (c); and adjusting a time, between a peak of an inner pressure generated in the gas generator and subsequent lowering of the inner pressure to one-fourth its peak value, is not less than 45 milliseconds when the gas generator is activated at room temperature: (a) an internal volume of a gas generator is 200 to 400 cm 3; (b) a ratio (L/D) of an axial length (L) of the gas generator to a diameter (D) of the gas generator is 0.6 to 1.5; and (c) an amount of gas generated by combustion of the molded article of a gas generating agent is 1.5 to 4.5 mol. 13. A method according to claim 12 of generating a gas, wherein the step of providing a molded article further includes: providing the molded article having a minimum thickness (W) of 0.8 to 2.2 mm. 14. A method according to claim 13 of generating a gas, wherein the step of providing a molded article further includes: providing the molded article having a perforation. 15. A method according to claim 12 of generating a gas, further comprising: providing, within the housing, a plurality of molded articles having a total surface area (A); providing a plurality of gas discharging ports in the housing; and adjusting a ratio (A/At) between the total surface area (A) and a total area of gas discharging ports (At) to be 500 to 1,000. 16. A method according to claim 12 of generating a gas, further comprising: providing, within the housing, a plurality of molded articles; providing a plurality of gas discharging ports in the housing; and adjusting a ratio (At/amount of gas) between a total area (At) of gas discharging ports and an amount of gas generated by combustion of the molded articles to be 0.8 to 1.0 cm2/mol. 17. A method according to claim 12 of generating a gas, further comprising: providing, within the housing, a plurality of molded articles; and adjusting a ratio (At/amount of gas) between a total surface area (A) of molded articles and an amount of gas generated by combustion of the molded articles to be 350 to 650 cm2/mol.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.