WO2000066402A1 - Générateur de gaz - Google Patents
Générateur de gaz Download PDFInfo
- Publication number
- WO2000066402A1 WO2000066402A1 PCT/JP1999/002291 JP9902291W WO0066402A1 WO 2000066402 A1 WO2000066402 A1 WO 2000066402A1 JP 9902291 W JP9902291 W JP 9902291W WO 0066402 A1 WO0066402 A1 WO 0066402A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gas
- combustion
- combustion chamber
- combustion chambers
- gas generator
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
- B60R21/272—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
- B60R2021/2633—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output with a plurality of inflation levels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
- B60R2021/2648—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder comprising a plurality of combustion chambers or sub-chambers
Definitions
- the present invention relates to an apparatus for inflating and deploying an airbag of an automobile, and more particularly to a gas generator capable of controlling a deployment form of the airbag.
- a gas generator for quickly deploying and inflating the airbag to protect the occupants of the vehicle from collisions caused by a vehicle collision is provided by the airbag's knob mounted in the instrument panel inside the steering wheel. Built into the module.
- the gas generator instantaneously generates a large amount of high-temperature gas based on a collision detection signal from a collision sensor in the event of a collision.
- a gas generator for inflating and deploying an airbag as shown in FIG. 16, the inner cylinder and the outer cylinder of the upper and lower containers 101 and 102 each having a closed double cylindrical structure are joined to each other.
- a housing 100 in which an annular closed space is formed by friction welding is provided.
- a gas generating agent 103 and a cylinder are arranged radially outward from the inner cylinder.
- the filter members 104 are sequentially housed. Further, an igniter 105 which is ignited by a collision detection signal from a collision sensor and a transfer agent 106 which is ignited by the ignition of the igniter 105 are arranged in the inside. ing.
- the gas generator is an ignition device based on the collision detection signal from the collision sensor.
- the ignition agent 105 ignites the transfer agent 106, and the flame of the transfer agent 106 is ejected into the enclosed space through the internal combustion hole 107, thereby producing a gas generating agent. 1
- the high-temperature gas flows into the filter member 1041, where it undergoes slag capture and cooling, and is discharged from the plurality of gas discharge holes 1 Ola of the upper container 101 into the Your bag, and the air bag is rapidly discharged. Inflate and deploy.
- the present invention makes it possible to control the airbag to be inflated and deployed slowly at the initial stage of deployment, and then to rapidly inflate and deploy thereafter, whereby the gas generator can exhibit the original function of the airbag.
- the purpose is to provide Disclosure of the invention
- a closed space in a housing is defined by a plurality of combustion chambers, and a gas generating agent, a filter member, and an igniter are arranged in each of the combustion chambers.
- the combustion chambers communicate with each other.
- the combustion of the gas generating agent in each combustion chamber is reduced to the capacity of the entire housing (sealing). Space). Therefore, when each igniter is activated with a time difference, it is generated in one combustion chamber in the early stage of air bag deployment, and is gradually expanded and deployed with a small amount of gas with suppressed pressure rise characteristics, and then generated in each combustion chamber.
- the airbag can be inflated and deployed rapidly by adding the gas with the specified pressure characteristics and the maximum pressure.
- the occupant is not subjected to the impact (punching phenomenon) due to rapid deployment in the early stage of the deployment of the airbag, and the original function of the airbag can be exerted.
- a closed space in the housing is defined by a partition member as two combustion chambers, and a gas generating agent, a filter member, and an igniter are arranged in each of the combustion chambers.
- the combustion chambers communicate with each other.
- the airbag can be deployed and inflated by controlling the gas pressure and the pressure rise characteristics of the deployment of the airbag.
- a housing is formed in a short circular shape, and a sealed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each combustion chamber. It was done. In each combustion chamber, a long inner cylinder and a short inner cylinder are projected, and an igniter is arranged in each inner cylinder. As a result, by operating the two igniters with a time lag, it is possible to control the gas released into the airbag, thereby enabling two-stage control of the airbag deployment. Moreover, the gas generating agent in each combustion chamber can be made combustible by a simple structure in which each igniter is arranged in each inner cylinder. Short housing It is most suitable for inflating and deploying the driver's seat airbag by making it cylindrical.
- the combustion chambers pass through each other quickly.
- the gas amount and the pressure rise characteristics of the airbag deployment can be controlled to deploy and inflate the airbag.
- a housing is formed in a short cylindrical shape, a sealed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers ⁇ . It is. In each combustion chamber, a long inner cylinder and a short inner cylinder are projected, and the upper and lower lids of the housing are joined by a long inner cylinder. An igniter is placed in each cylinder. I do. As a result, by operating the two igniters with a time lag, it is possible to control the gas released into the rear bag, thereby enabling two-stage control of the airbag deployment.
- the gas generating agent in each combustion chamber can be made combustible by a simple structure in which each igniter is disposed in each cell.
- the structural strength of the housing can be increased, so a large gas generator that generates a large amount of gas or a non-gas generator that generates a high-pressure gas Adaptation is also possible in the case of chemical gas generators.
- the housing By making the housing a short cylindrical shape, it is most suitable for inflating and deploying the driver's seat airbag.
- the combustion chambers communicate with each other.
- the gas amount and the pressure rise characteristics of the airbag deployment can be controlled to deploy and inflate the airbag.
- a housing is formed in a short circle shape, a combustion space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers. It was done. Also, inside each combustion chamber, an S scale inner cylinder and a short length inner wall are projected, and igniters are arranged in each inner wall. As a result, by operating the two igniters with a time difference, it is possible to control the gas released into the air bag and to enable two-stage control of the air pacing.
- the gas generator in each combustion nitrogen can be burned by a simple structure in which each igniter is arranged in each inner cylinder.
- the short cylindrical shape of the housing is suitable for inflating and deploying the driver's seat airbag.
- each of the combustion chambers is communicated through a gas passage space by forming a closed space inside the housing into a gas passage space and a combustion space with an inner member.
- each combustion chamber can be communicated with a simple configuration of adding the inner cylinder material, and similarly to the first invention, the airbag deployment gas amount and the pressure rise characteristics are controlled, and the airbag is opened. It can be expanded and expanded.
- a housing is formed in a short cylindrical shape, an enclosed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers. It is. In each combustion chamber, a long inner cylinder and a short inner cylinder are projected, and the upper lid and lower pot of the housing are joined by the long inner cylinder. An igniter is arranged in each inner cylinder. . As a result, by operating the two igniters with a time lag, it is possible to control the gas discharged into the airbag and to enable two-stage control of the airbag deployment.
- each combustion chamber can be burned by a simple structure in which each igniter is disposed in each inner cylinder.
- the structural strength of the housing can be increased, so a large gas generator that generates a large amount of gas or a non-azide gas that generates high-pressure gas Adaptation is also possible in the case of generators.
- the housing By making the housing a short cylindrical shape, it is most suitable for inflating and deploying the driver's seat airbag.
- each of the combustion chambers is communicated through a gas passage space by defining a closed space in the housing as a gas passage space and a combustion space by an inner material. This allows the combustion chambers to communicate with each other with a simple configuration in which an inner cylinder is added.
- the gas amount of the airbag deployment and the pressure rise characteristics are controlled, so that the airbag can be used. It can be expanded and expanded.
- a housing is formed in a short circular shape, a combustion space in the housing is divided into two combustion chambers by a partition member, and a gas generating agent and a filter member are arranged in each of the combustion chambers. It was done.
- a long cylinder and a short inner cylinder are protruded, and an igniter is arranged in each inner cylinder.
- the gas generating agent in each combustion chamber can be made combustible by a simple structure in which each igniter is arranged in each inner cylinder.
- the shape of the housing is a short circle, so that the airbag for seats is inflated and deployed.
- the seventh invention is that the sealed space inside the housing is formed into a gas passage space by the inner cylinder material and the filter member, and is formed in the combustion space, so that each combustion chamber is passed through the gas passage space and the filter member. It is a communication.
- the combustion chamber can be communicated by adding a cylinder material and a simple structure with the filter member, and as in the first invention, the gas amount and pressure rise characteristics of the airbag deployment can be improved. By controlling, the airbag can be deployed and inflated.
- a housing is formed in a short cylindrical shape, a sealed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers. It is.
- the long inner cylinder and the short inner wall are made to protrude, and the upper and lower lids of the housing are joined at the long inner wall.
- the igniters are arranged in each inner cylinder.
- the gas generating agent in each combustion chamber can be made combustible by a simple structure in which each igniter is arranged in each interior.
- the structural strength of the housing can be increased, so a large gas generator that generates a large amount of gas Non-azide system that generates high-pressure gas Adaptation is also possible in the case of gas generating agents.
- the housing By making the housing a short cylindrical shape, it is most suitable for inflating and deploying the driver's seat airbag.
- the closed space inside the housing is formed in the gas passage space and the combustion space by the inner cylinder material and the filter member, so that each fuel chamber can be continuously connected through the gas passage space and the filter member. It is a thing.
- the internal cylinder is added, and the combustion chambers can be communicated with each other by a simple structure with the filter member.
- the gas amount and the pressure rise characteristics of the airbag deployment can be controlled.
- the airbag can be deployed and inflated.
- a housing is formed in a short circular shape, and an enclosed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each combustion chamber. It was done. In each combustion chamber, a long inner cylinder and a short inner cylinder are projected, and an igniter is arranged in each inner cylinder. As a result, by operating the two igniters with a time lag, it is possible to control the gas released into the airbag, thereby enabling two-stage control of the airbag deployment. Moreover, the gas generating agent in each combustion chamber can be made combustible by a simple structure in which each igniter is disposed in each interior. Also, by making the housing a short cylinder, the airbag for the driver's seat can be expanded and deployed. Optimal.
- the combustion chambers communicate with each other through gas holes of the partition member.
- each combustion chamber can be communicated with a simple structure in which a gas through hole is formed in the partition member, and similarly to the first invention, the gas amount and pressure rise characteristics of the airbag deployment are controlled.
- the airbag can be deployed and inflated.
- a housing is formed in a short circle shape, a sealed space in the housing is defined by a partition member in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers. It was done. In each combustion chamber, a long inner cylinder and a short cylinder are projected, and the upper and lower lids of the housing are joined to the long inner cylinder. An igniter is arranged in each inner cylinder. I do. As a result, by operating the two igniters with a time difference, it is possible to control the gas released into the air bath and to enable two-stage control of the air bag deployment.
- each combustion chamber can be made combustible by a simple feeder in which each igniter is arranged in each inner cylinder. Since the structural strength of the housing can be increased by joining with a long inner cylinder, a large amount of gas can be used for large gas generators that generate Ik and non-azide gas generators that generate high-pressure gas. Can also be adapted. Further, the housing is formed into a short cylindrical shape, which is most suitable for inflating and deploying an air basig for a driver's seat. . By this, each combustion chamber can be communicated by a simple structure in which a gas through hole is formed in the partition member, and similarly to the first invention, by controlling the gas amount and the pressure rise characteristic of the air bag deployment, The airbag can be deployed and inflated.
- the housing is formed in a long cylindrical shape, and the inside of the housing is formed. This closed space is defined in two combustion chambers, and a gas generating agent and a filter member are arranged in each of the combustion chambers. At the end of the housing, an igniter is placed.
- the two igniters As a result, by operating the two igniters with a time lag, it is possible to control the gas released into the airbag, thereby enabling two-stage control of the airbag deployment. Moreover, by making the housing a long cylinder, it is most suitable for inflating and deploying the airbag for the passenger seat or side collision.
- the combustion chambers communicate with each other. As a result, similarly to the first invention, the gas amount and the pressure rise characteristics of the airbag deployment can be controlled to deploy and inflate the airbag.
- the closed space of the housing is defined by the partition member into two combustion chambers, and each combustion chamber is communicated through the gas through hole of the partition member.
- An air gap is defined in the gas passage space and the combustion space by the inner cylinder material, the combustion space is defined by the partition member in two combustion chambers, and each combustion chamber is connected through the gas passage space.
- the enclosed space of the housing is defined by a gas passage space and a combustion space by the inner cylinder material and the filter member, and the combustion space is defined by the partition member into two combustion chambers, and each combustion chamber is formed by a gas.
- a system that communicates through the passage space and the filter member can be adopted.
- a third invention to a tenth invention are directed to forming a projection for accommodating the igniter in the partition member. This makes it possible to easily arrange the igniter in the short inner cylinder. Also in the third invention - the invention of the first 0, by a simple structure by a which 9 This should be adopted a structure that fit position ⁇ the partition member abuts the stepped portion of the long inner cylinder, two combustion A chamber can be defined, and the volume ratio of the two combustion chambers can be easily changed by adjusting the step. Further, in the second invention to the eleventh invention, a cushion member for suppressing the transfer of combustion heat is arranged in the partition member. As a result, transmission of the combustion heat generated by one of the combustion chambers can be cut off, and when the combustion of the gas generating agent in the two combustion chambers is ignited with a time difference, it can be ensured that each igniter can adjust the combustion.
- the inner cylindrical member is formed of an expanded metal.
- the expanded metal has a plurality of gas passage holes that protrude from the inner and outer peripheral surfaces and pass through each other quickly, and the expanded metal layer itself forms a gas passage space.
- the inner member and the outer member and the filter member can be arranged in close contact with each other, and the positioning and arrangement of these members becomes easy.
- the filter member is formed by a knitted wire mesh or a crimp-woven metal wire. As a result, the filter member can be manufactured at low cost.
- FIG. 1 is a cross-sectional view showing a gas generator for a driver's seat according to the present invention
- FIG. 2 is a cross-sectional view showing another gas generator for a driver's seat
- FIG. FIG. 2B is a cross-sectional view taken along the line A-A of FIG.
- FIG. 4 is a cross-sectional view showing another gas generator for the driver's seat
- FIG. 5 is a cross-sectional view taken along line C-C of FIG.
- FIG. 6 is a diagram showing an expansive metal for forming a steel material
- FIG. 7 is a cross-sectional view showing a tension state of the expansive metal shown in FIG.
- FIG. 8 is a view showing a knitted wire mesh or crimped wire mesh for forming a filter member.
- FIG. 9 is a sectional view showing a gas generator for a passenger seat or a side collision according to the present invention.
- the figure is a cross-sectional view taken along line DD and line EE in FIG.
- FIG. 11 is a cross-sectional view showing another passenger seat or side collision gas generator
- FIG. 12 is a cross-sectional view taken along line FF of FIG.
- FIG. 13 is a cross-sectional view showing still another gas generator for a passenger seat or a side biting mouth
- FIG. 14 is a sectional view taken along line GG of FIG.
- FIG. 15 is a graph comparing the pressure increase characteristics and the maximum quotient pressure of the gas generator according to the present invention and the gas generator of the comparative example.
- No. 1 611 is a cross-sectional view showing a conventional driver-side gas generator. BEST MODE FOR CARRYING OUT THE INVENTION
- the interior of the housing is defined as two combustion chambers, and the gas generating agent loaded in each combustion chamber is independently ignited by the igniters arranged in each combustion chamber.
- the two combustion chambers communicate with each other via a filter member, and by operating the igniter with a time difference, the pressure rise of gas released from the housing and the maximum pressure can be controlled.
- the gas generator X 1 for the driver's seat shown in FIGS. 1 and 3 is composed of a short circular housing 1, an inner cylindrical member 2 inserted in the housing 1, and an inner biasing member 2 ⁇ , two upper and lower combustion chambers. 3, a partition member 5 to be provided, a gas generating agent 6 and a filter member 7 disposed in each of the combustion chambers 3 and 4, and a gas generating agent 6 of each of the combustion chambers 3 and 4. It has two igniters 8 and 9 that burn independently.
- the housing 1 has a structure in which an upper container 10 and a lower container 11 form a closed space S inside.
- the upper container 10 is formed in a closed cylindrical shape by closing the upper end of a short cylindrical outer surface 12 with an upper lid 13 and is integrally formed of an aluminum alloy or the like.
- a plurality of gas discharge holes 12 a opening into the sealed space S are formed on the upper lid 13 side of the outer case 12, and these gas discharge holes 12 a are attached to the inner periphery of the outer cylinder 12. It is closed by a worn burst plate 15.
- the burst plate 15 is made of, for example, aluminum foil or the like, and plays a role in preventing moisture in the housing 1 and adjusting pressure during combustion.
- An inner projection 14 is formed in the center of the upper lid 13 so as to project concentrically with the outer projection 12 and project inside.
- the lower container 11 is formed in a cylindrical shape with a bottom by closing the lower end of a short-circular flanged cylindrical portion 16 with a lower lid 17, and is integrally formed of an aluminum alloy or the like.
- a side flange 20 is formed at the upper end of the flanged cylindrical portion 16 so as to bend radially outward with water.
- the side flange 20 is attached to a retainer of an airbag module (not shown).
- the lower part 17 has a question about the long inner cylinder 18 which is arranged concentrically with the flange cylinder part 16 at the center, and the long inner cylinder 18 and the flange cylinder part 16. Are formed integrally with the short inner cylinder 19 disposed at the flange so as to protrude from the flange ⁇ 16 ⁇ .
- the housing 1 is configured such that the lower peripheral surface of the outer cylinder 12 of the upper container 10 abuts on the bottom peripheral surface of the lower lid 17 and the lower peripheral surface of the inner cylinder projection 14 is formed on the long inner cylinder 18.
- butt welding for example, friction welding
- the upper and lower ends of the outer cylinder 12 are closed by the lids 13 and 17 to form a double-circle structure.
- a closed space S is formed.
- the closed space S of the housing 1 is located between the outer cylinder 12 and the short inner cylinder 19 and is concentric with the long inner cylinder 18.
- annular combustion space S 1 between the inner periphery of the inner cylinder member 2 and the outer periphery of the long inner cylinder 18, and the inner periphery of the annular combustion space S 1
- An annular gas passage space S2 between the circumference and the periphery is defined.
- the inner cylindrical member 2 has a plurality of gas passage holes 2a communicating the spaces S1 and S2 in the axial direction and the circumferential direction.
- the inner cylinder 2 extends from the lower lid 17 to the vicinity of the upper lid 13, and the upper end is closed by a lid 21 pressed into the outer periphery of the long inner cylinder 18.
- the base material 22 having a large number of slits 22a formed at predetermined intervals is uniformly pulled as shown in FIG. 6 (a). It is manufactured using expansive metal having a plurality of gas passage holes 2a as shown in FIG. Then, as shown in Fig. 6 (c), the inner cylindrical member 2 is formed by molding an expansive metal having a predetermined length and width into a cylindrical shape, and fixing the ends to each other by a joining method such as spot welding. To make more.
- a stainless steel sheet or a thin steel sheet other than stainless steel is used as the base material 22 a stainless steel sheet or a thin steel sheet other than stainless steel is used.
- each slit 22a is formed by the base material as shown in FIG. 7 during the tensile processing in the direction of the arrow shown in FIG. 6 (a). 22 It is curved from the plane portion B to the inner and outer circumferences by the height h from the top. Therefore, the inner cylindrical member 2 has a plurality of gas passage holes 2a protruding at a height h at each slit 22a at the outer periphery thereof, opening in the circumferential direction and extending in the axial direction, and The structure is such that the gas passage holes 2a communicate with each other in the circumferential direction.
- the inner cylindrical member 2 is not limited to being made of expansive metal, but is formed by forming a porous thin steel plate (such as a punching plate) having a plurality of gas passage holes 2a at predetermined intervals into a cylindrical shape. Then, the ends can be joined together by spot welding or another joining method. In the cylindrical member 2 made of a punching plate, it is necessary to provide a space between the cylindrical member 2 and the outer periphery of the outer cylinder 12 so as to define the gas passage space S2.
- the combustion space S1 in the inner cylindrical member 2 is divided into upper and lower two combustion chambers 3 and 4 by a partition member 5 arranged between the upper part 13 and the lower lid 17 in substantially parallel with them.
- the partition member 5 is formed in a disk shape which can be press-fitted into the inner member 2, and has a through hole 23 at the center thereof, through which the long inner cylinder 18 passes. Further, the partition member 5 is formed with a cup-shaped convex portion 24 that is eccentric to the through hole 23 and protrudes like a raft on the short inner diameter 19.
- the partition member 5 is inserted into the inner periphery of the inner member 2 from the opening end of the lower container:!. 1, and the through hole 23 is fitted into the long tube 18 to form the long inner tube 18. Positioned in contact with step 18a.
- the partition member 5 has two upper and lower combustion chambers 3 and 4 in the axial direction of the housing 1 in a state where the opening side of the projection 24 faces the short inner cylinder 19.
- Each of the combustion chambers 3 and 4 is loaded with a gas garden freshener 6, and a filter member 7 is arranged so as to surround it.
- the finoleta member 7 of each of the combustion chambers 3 and 4 has a cylindrical shape that can be inserted into the inner cylindrical member 2.
- the filter member 7 of the upper combustion chamber 3 is inserted into the inner cylindrical member 2 and extends from the partition member 5 to contact the lid member 21.
- the filter member 7 of the chamber 4 is inserted into the inner cylindrical member 2 and extends from the lower lid 17 until it comes into contact with the partition member 5.
- the filter member 7 As the filter member 7, a knitted wire mesh shown in FIG. 8 (a) or an aggregate of crimp woven gold wire shown in FIG. 8 (b) is press-formed into a cylindrical shape as shown in FIG. 8 (c). It is preferable to manufacture it at low cost.
- the combustion chambers 3 and 4 are configured to communicate with each other through the filter members 7, the gas passage holes 2 a of the inner cylindrical member 2, and the gas passage space S 2. Further, between the gas generating material 6 and the partition member 5 in the lower combustion chamber 4, a cushion member 25 abutting on the partition member 5 is arranged.
- the cushion member 2S also has a function as a heat insulating material for preventing powder dust due to the diffusion of the gas generating agent 6 and for suppressing heat transfer between the combustion chambers 3 and 4. Therefore, as the cushion member 25, it is preferable to use a green raw material having a heat insulating function such as a ceramic fiber.
- a cushion member 26 that contacts the lid member 21 is provided between the gas generating agent 6 of the upper combustion chamber 3 and the lid member 21, a cushion member 26 that contacts the lid member 21 is provided.
- the cushion member 26 also has a function of preventing powdering due to the vibration of the gas generating agent 6, and it is preferable to use an elastic material such as silicone rubber or silicon foam, but a material having a heat insulating function such as ceramic fibers. It does not matter.
- Each of the igniters 8 and 9 is composed of a holding portion 27A and an ignition portion 27B disposed at the tip of the holding portion 27A, and has an inner cylinder protrusion 14 and an inner diameter 18
- the storage space formed and the storage space formed by the inside of the projection 24 of the partition member 5 and the inside of the short length 19 are arranged independently of each other.
- Each of the igniters 8 and 9 is hermetically sealed by interposing a seal lin (rubber sheet) on a tapered step 28 formed in the long inner cylinder 18 and the short inner ⁇ 19.
- the inner cylinders 18 and 19 are fixed by caulking by bending inwardly the force crimping portions 30 at the tips.
- the igniter 8 of the escalating cylinder 18 has the ignition portion 27B protruding into the storage space, and the flames caused by the ignition of the igniting portion 27B are connected to the plurality of igniters 18 of the escalating cylinder 18. Spray into upper combustion chamber 3 ⁇ through vent 18b.
- the ignition portion 27B penetrates through the cushion member 25 and protrudes to the projection 24, so that the flame caused by the ignition of the ignition portion 27B The gas is ejected into the lower combustion chamber 4 through the gap between the short cylinder 19 and the short cylinder 19.
- These igniters 8 and 9 ignite based on a collision detection signal from a collision sensor (not shown).
- the collision sensor detects the collision of the car
- first, only the igniter 8 on the upper combustion chamber 3 side is operated to ignite the ignition portion 27B.
- the ignition flame of the ignition portion 27B is ejected from each of the ignition holes 18b into the upper combustion chamber 3, and the flame is forcibly ignited by the flame to generate high-temperature gas by burning. .
- the heat of combustion generated in the upper combustion chamber 3 is suppressed (dulled) by the heat insulating function of the cushion member 25, and the gas generating agent 6 of the lower combustion chamber 4 is ignited at the same time. Has been prevented.
- the high-temperature gas generated in the upper combustion chamber 3 flows into the filter member 7, passes through the slag trapping and cooling by the filter member 7, and passes through the gas passage holes 2a of the inner cylindrical member 2 into the gas passage space S2. Leaked to When the gas pressure rises with the combustion in the upper combustion chamber 3 and reaches a predetermined pressure, the burst plate 15 is broken, and the clean gas uniformized in the gas passage space S 2 It is discharged into the airbag from the discharge hole 12a.
- the combustion in the upper combustion chamber 3 depends on the entire volume (sealed space S) of the housing 1 including the lower combustion chamber 4 communicated with the gas passage space S2 and the like.
- the pressure characteristic is such that the pressure rise is suppressed (dulled) by the added volume (the volume of the lower combustion chamber 4).
- the calorific value of the gas flowing out into the lower combustion chamber 4 is absorbed (cooled) when passing through the inner cylinder 2 and the filter member 7 on the lower combustion chamber 4 side, and the temperature of the gas decreases. Since the gas is ejected from the lower combustion chamber 4 into the lower combustion chamber 4, the gas generating agent 6 in the lower combustion chamber 4 is not spontaneously ignited.
- the airbag is inflated and deployed by a small amount of clean gas whose pressure rise has been suppressed (slowed down) so that it is gently and slightly stretched.
- a by adjusting the cross-sectional area for gas passage in the gas passage space S2 and controlling the gas flow flowing out to the lower combustion chamber 4: a, a small amount of gas having an appropriate pressure-rise characteristic can be obtained. Inflate and deploy the airbag with gas.
- the gas generating agent 6 in the lower combustion chamber 4 is forcibly ignited and combustion is started.
- Generate hot gas The high-temperature gas generated in the lower combustion chamber 4 flows out from the gas passage holes 2 a of the cylindrical member 2 into the gas passage space S 2 in the same manner as the upper combustion chamber 3, and the gas discharge holes 1 2
- the air pasig is transferred to rapid expansion and deployment by the clean gas of Tado released from both combustion chambers 3 and 4.
- the combustion brick in the lower combustion chamber 4 has the same volume as the housing 1 which is communicated with the upper combustion chamber 3 in the gas passage space S2 and the like (sealed space S). Done. Therefore, the cleaning gas released to the airbag is generated by the combustion in the lower combustion chamber 4 in addition to the gas pressure of the entire housing 1 (the gas pressure generated by the combustion in the upper combustion chamber 3) when the igniter 9 is activated.
- the gas has a pressure rising characteristic, and the flat pressure of these gas pressures is set as the maximum pressure Pmax, so that the second bang is rapidly expanded and deployed.
- the small time difference for activating each of the igniters 8 and 3 it is possible to control the pressure rise characteristic of the gas discharged to the airbag and the minimum pressure Pmax, and to perform the operation when the airbag is inflated and deployed. Therefore, it is possible to reduce the impact on the occupant.
- the lower combustion chamber 4 uses the amount of heat of the high-temperature gas flowing into the lower combustion chamber 4. It is necessary to delay the timing until the gas generating agent 6 in the chamber 4 spontaneously ignites by a small time difference.
- the operation of the igniters 8 and 9 does not necessarily have to be performed with a slight time difference, but the operation of each of the igniters 8 and 9 is appropriately selected depending on the collision mode of the automobile.
- each igniter 8, 9 Activate each igniter 8, 9 simultaneously.
- the airbag is rapidly inflated and deployed by the large amount of gas generated in each of the combustion chambers 3 and 4 and having a characteristic of rapid pressure rise, and the maximum pressure Pmax of the gas pressure is also high. it can.
- each of the igniters 8 and 9 is operated with a small time difference.
- the airbag is gradually inflated and deployed in the early stage of deployment with a small amount of gas that suppresses the rise in gas pressure, and rapidly expanded and deployed by a large amount of gas with improved pressure characteristics after a small time lag.
- the maximum pressure P max of the gas pressure can be suppressed as compared to a head-on collision at speed, etc.
- the gas generating agent 6 in the upper combustion chamber 3 is forcibly ignited, and the gas generating agent 6 in the lower combustion chamber 4 is spontaneously ignited by the high-temperature gas discharged into the lower combustion chamber 4.
- the gas generated by the spontaneous ignition is released into the airbag with a time difference that does not contribute to the protection of the occupant, so that the airbag is inflated and deployed slowly. Also, due to this spontaneous ignition, even when only one igniter 8 is operated, the gas generating agent 6 in the lower combustion chamber 4 is completely burned and does not remain.
- the gas generator XI can regulate an extremely wide range of maximum pressures depending on the forcible ignition of the igniters 8 and 9.
- the igniters 8 and 9 are operated with a slight time difference to generate pressure only from the upper combustion chamber 3 in the initial stage of the air bag deployment, thereby suppressing a pressure rise. Slow expansion due to the small amount of gas produced! After that, deployment control can be performed to rapidly inflate and deploy with a large amount of gas generated from both combustion chambers 3 and 4 and whose pressure rise has been increased (control of the amount of gas released to the airbag and the gas pressure in two stages). Can be done).
- the inner cylinder 2 is made of eta spand metal
- the outer peripheral side of the expansed metal is warped when the opening is formed, so that the base metal 2 2 has a height h from the reference plane B as shown in FIG. Is formed.
- the gas passing air space S is kept in the expansive metal itself. 2 can be integrally formed.
- the driver-side gas generator X2 in FIGS. 2 and 3 will be described.
- the gas generator X2 shown in FIGS. 2 and 3 is different from the gas generator X1 shown in FIG. 1 and 3 are the same, and the same members as those in FIGS. 1 and 3 are denoted by the same reference numerals, and redundant description is omitted.
- the filter member 7 is inserted into the inner member 2 and extends between the lower lid 17 of the lower container 11 and the lid member 21.
- the partition member 5 is inserted into the inner periphery of the filter member 7 from the open end of the lower container 11, and the through hole 23 is fitted into the long inner cylinder 18, and the step of the long inner cylinder 18 is formed. Positioned in contact with 18a.
- the partition member 5 defines the upper and lower two combustion chambers 3 and 4 in the axial direction of the housing 1 in a state where the opening side of the projection 24 faces the short inner cylinder 19.
- a gas generating agent 6 is loaded in each of the combustion chambers 3 and 4. Further, each of the combustion chambers 3 and 4 is configured to be in communication with each other through the filter member 7 or the filter member 7 and the gas passage space S2.
- the collision sensor detects the collision of the car and only the igniter 8 on the upper combustion chamber 3 is activated, the high-temperature gas generated in the upper combustion chamber 3 is trapped by the filter member 7 as shown in FIG. After collecting and cooling, it is homogenized by gas passing sky It) S2 After that, the release into the airbag is started.
- combustion of the gas generating agent 6 in the lower combustion chamber 4 starts, as shown in FIG. Similarly, the airbag is moved to a rapid inflation deployment by the large amount of clean gas released from both combustion chambers 3,4.
- the combustion in the lower combustion chamber 4 is performed in the same manner as the upper combustion chamber 3 by using the entire volume of the housing 1 that is connected to the upper combustion chamber 3 by a filter member or the like.
- the purified gas released into the chamber has a pressure rise characteristic due to the gas pressure generated by combustion in the lower combustion chamber 4 in addition to the gas pressure of the entire housing 1 when the igniter 9 is activated.
- the equilibrium pressure is the maximum pressure Pmax
- the airbag is inflated and deployed rapidly.
- the time difference between the activation of each of the igniters 8 and 9 is appropriately adjusted to obtain a predetermined pressure rise characteristic and a maximum pressure P depending on the collision mode of the vehicle. It is what is set to max.
- the deployment of the airbag can be easily controlled as in FIG. 1, and the original function of the airbag can be safely performed.
- the filter member 7 is disposed in each of the combustion chambers 3 and 4 in order to collect and cool the slag of the combustion gas generated in each of the combustion chambers 3 and 4 by using an integrated filter member 7.
- the number of parts can be reduced and the production cost can be reduced.
- the driver-side gas generator X3 in FIGS. 4 and 5 will be described.
- the gas generator X 3 shown in FIGS. 4 and 5 is different from the gas generator X 1 shown in FIG. 1 in that the partition member 5 is inserted around the inner circumference of the outer cylinder 1 2 without providing the inner cylinder 2.
- the upper and lower two combustion chambers 3 and 4 are defined, and the partition member 5 is formed with a gas through hole 5a that communicates with each of the combustion chambers 3 and 4, for example.
- the same members as those described above are denoted by the same reference numerals, and redundant description will be omitted.
- the partition member 5 is inserted into the inner periphery of the outer cylinder 12 from the opening end of the lower container 11, and the hole 23 for fitting the hole into the long inner cylinder 18 is inserted into the long inner cylinder 18.
- the level is determined by contacting the step 18a of the shank inner cylinder 18.
- the partition member 5 defines two upper and lower combustion chambers 3 and 4 in the axial direction of the housing 1 in a state where the opening side of the projection 2 faces the short inner cylinder 19.
- a plurality of gas holes 5 a are formed on the outer periphery ⁇ of the partition member 5. As shown in IH 5, four gas through holes 5a are formed at an angle of 90 degrees in the circumferential direction of the housing 1.
- the combustion chambers 3 and 4 are in communication.
- a gas generating agent 6 is loaded in each of the combustion chambers 3 and 4, and a filter member 7 is disposed so as to surround the gas generating agent 6.
- Each filter member 7 extends from the lower pot 17 to the partition member 5, or extends from the partition member 5 to the lid member 21, and is disposed in each combustion block 3, 4. or, Each filter member 7 covers each gas through hole 5a at the end on the partition member 5 side, and defines a gas passage space S2 between itself and the inner periphery of the outer surface 12.
- each of the combustion chambers 3 and 4 is configured to be connected to each other through each of the filter members 7 and each of the gas through holes 5a.
- a plurality of gas discharge holes 12 a communicating the gas passage space S 2 of each of the combustion chambers 3 and the outside are formed in the outer periphery 12 of the upper container 10.
- the collision sensor detects an automatic collision and activates only the igniter 8 on the upper combustion chamber 3 side
- the combustion gas generated in the upper combustion chamber 3 is slagged by the filter member 7 as in FIG. After being trapped and cooled, it is homogenized in the gas passage space S2 and then released into the airbag.
- the combustion in the lower combustion chamber 4 is performed by the entire volume of the housing 1 that is communicated with the upper combustion chamber 3 through the gas communication holes 5a and the like, as in the upper combustion chamber 3.
- the clean gas released into the airbag has a pressure-rise susceptibility due to the gas pressure generated by combustion in the lower combustion chamber 4 in addition to the gas pressure of the entire housing 1 when the igniter 9 operates.
- Gas pressure flat Assuming that the equilibrium pressure is the maximum pressure Pmax, the airbag is inflated and deployed rapidly.
- the time difference between the activation of each of the igniters 8 and 9 is appropriately adjusted to obtain the predetermined pressure rise characteristics and the maximum pressure according to the vehicle collision mode. P ma X.
- the deployment control of the airbag can be easily performed, and the original function of the airbag can be exhibited safely.
- the mode in which the gas generating agent 6 in the upper combustion chamber 3 is burned and then the gas generating agent 6 in the lower combustion chamber 4 is burned has been described.
- the present invention is not limited to this, and the upper combustion chamber 3 may be burned after the lower combustion chamber 4 is burned.
- the volume of each of the combustion chambers 3 and 4 can be changed so that one is larger and the other is smaller, so that ignition is performed from the large-capacity combustion side.
- the passenger-side or side-surface 1 ⁇ gas generator ⁇ 1 shown in Fig. 9 and Fig. 10 is composed of a long cylindrical housing 31 and two combustion chambers 33, 34 inside the housing 31.
- the housing 31 is composed of an outer cylinder 42 with an open end at both ends, and two lid members 41 that respectively close both openings of the outer shell 42.
- each lid member 41 is fitted from both open ends of the outer cylinder 42, and the caulking projections 4 2 b protruding from both sides of the outer cylinder 42 are bent inward.
- the structure is such that a closed space S is formed inside.
- a plurality of gas discharge holes 42 a are formed in the outer periphery of the outer cylinder 42 and communicate with an airbag (not shown) for a passenger seat. As shown in FIG. 10 (a), each gas discharge hole 42a is formed on a straight line extending in the axial direction at an angle of 180 degrees in the circumferential direction of the housing 31.
- the row of gas holes rl, r2 are formed.
- the gas discharge holes 42 a of each gas hole row rl, r 2 are sequentially formed at predetermined intervals in the axial direction of the outer cylinder 42, and are formed in a belt shape adhered to the inner periphery of the outer cylinder 42.
- the burst plates are each closed with 4-7.
- the burst plate 47 is made of, for example, aluminum foil or the like, and has a length and a width sufficient to close the gas discharge holes 42a for each of the gas hole rows r1 and r2. It is not excluded that a single burst plate 47 is attached over the inner circumference of the outer cylinder 42.
- the closed space S of the housing 31 is defined by a partition member 35 into two left and right combustion chambers 33, 34 in the axial direction of the housing 31.
- the partition member 35 is inserted into the inner periphery of the outer cylinder 42 to define the combustion chambers 33, 34, and is drawn on the outer periphery of the outer cylinder 42 (the outer cylinder 4). It is fixed by caulking by the method of reducing the diameter of 2).
- the partition member 35 has a plurality of gas through holes 35a formed on the outer peripheral side thereof. As shown in FIG. 10 (b), each of the gas through holes 35 a is formed at 90 degrees in the circumferential direction of the housing 31 and is divided in the axial direction of the housing 31.
- the combustion chambers 33, 34 are communicated through the member 35.
- a gas generating agent 36 is loaded into each of the combustion chambers 33, 34 defined by the partition member 35, and a filter member 37 and an inner cylindrical member 32 are arranged in this order so as to surround the gas generating agent 36.
- Each filter member 37 is fitted into the projection 41 a of each lid member 41, and covers each gas through hole 35 a at an end extending to the partition member 35, and sandwiches the partition member 35. are doing.
- the filter member 37 is manufactured by forming an aggregate of a mesh wire mesh or a crimp-woven metal wire into a cylindrical shape. Further, the filter member 37 may be divided into a plurality of filter units which are sequentially stacked in the axial direction of the housing 31. By appropriately changing the number of stacked filter units, the housing member 31 can be used. The filter member 37 can be arranged corresponding to the length of the filter member.
- Each inner cylindrical member 32 is fitted around the outer periphery of the filter member 37 of each of the combustion chambers 33, 34 to form an annular gas passage space S2 with the inner periphery of the outer cylinder 42. are doing.
- Each inner cylindrical member 32 is fitted into the convex portion 41 a of each lid member 41 together with the filter member 37, and extends from each lid member 41 to the partition member 35.
- a plurality of gas passage holes 32 a communicating with the inside of the filter member 37 and the gas passage space S 2 are formed on the peripheral surface of each inner cylindrical member 32. As shown in FIG. 10 (a), each gas passage hole 32a is opened at a displaced portion that does not face each gas discharge hole 42a when viewed from the circumferential direction of the housing 31.
- each gas passage hole 32a of the inner cylinder member 32 does not directly go to each gas discharge hole 42a of the outer cylinder 42, but flows inside the outer cylinder 42. After being colliding with the periphery and collecting and cooling the slag in the outer cylinder 42, the slag is discharged into the airbag from each gas discharge hole 42 a.
- the inner cylindrical member 32 is preferably formed into a cylindrical shape with expansive metal as in FIGS. 6 and 7, but may be manufactured by forming a punching plate into a cylindrical shape. If the inner cylinder 32 is made of expansive metal, it can be arranged so as to be in contact with the inner circumference of the outer cylinder 42 and the outer circumference of the filter member 37, and as in FIG. A space S2 can be formed.
- Each igniter 3 8, 3 9 comprises a transfer agent 4 4 and an igniter 4 5 igniting the transfer agent 4 4, and each cover member 4 1 closing both openings of the outer cylinder 4 2.
- the gas generating agent 36 in each of the combustion chambers 33 and 34 is independently burned.
- Each igniter 45 is fixed by caulking in the convex portion 41 a of each lid member 41.
- each transfer agent 44 is housed in a flanged cap 46 fitted in the convex portion 41a of each lid member 41, and is ignited with a gap between the convex portions 41a. It is facing the tool 4 5.
- the protruding side 46 a of the flanged cap 46 is inserted into the filter member 37, and the ignition flame of the transfer agent 44 is injected into the filter member 37 of each of the combustion chambers 33, 34. It has a through hole 46b to be ejected.
- the flange 46 c of the cap 46 closes the lid 41 side of the filter member 37 and extends to the inner circumference of the outer cylinder 42, and the lid 41, the finoleta member 37, and the inner cylinder 3 It is pinched by two.
- the flange portion 46 c is in contact with a seal member 48 interposed in the lid member 41, and seals the combustion chambers 33, 34 from the outside.
- the igniter 44 is ignited by operating only the igniter 38 on the left combustion chamber 33 side.
- the igniting flame of the transfer agent 4 4 is ejected from the through hole 4 6 b of the flanged cap 46 into the left combustion chamber 33, and the gas generating agent 36 is forcibly ignited by this flame and burned. To generate hot gas.
- the pressure characteristics are such that the pressure rise is suppressed (dulled).
- the calorific value of the gas flowing into the right combustion chamber 34 is absorbed (cooled) when passing through the inner cylindrical member 32 and the filter member 37 on the right combustion chamber 34 side, and the temperature decreases. Since the fuel is injected from the filter member 37 into the right combustion chamber 34, the gas generating agent 36 in the right combustion chamber 34 cannot be immediately ignited spontaneously.
- the airbag is inflated and deployed by a small amount of clean gas whose pressure rise has been suppressed (slowed down) so that it is gently and slightly stretched.
- a small amount of clean gas whose pressure rise has been suppressed (slowed down) so that it is gently and slightly stretched.
- the airbag can be inflated and deployed with a small amount of gas.
- the igniter 39 in the right combustion chamber 34 is actuated after a small time lag to produce the right combustion chamber.
- the gas generating agent 36 in 34 is forcibly ignited and combustion starts to generate high-temperature gas.
- the high-temperature gas generated in the right combustion chamber 34 is discharged from each gas passage hole 32 a of the inner cylindrical member 32 into the gas passage space S 2 in the same manner as the left combustion chamber 33, and Since the airbag is released from 2a into the airbag, the airbag is shifted to rapid inflation and deployment by a large amount of clean gas released from both combustion chambers 33, 34.
- the combustion in the right-side combustion chamber 34 involves the entire volume of the housing 31 communicated with the left-side combustion chamber 33 through the gas holes 35a and the like (the closed space S ). Therefore, the clean gas released into the airbag is generated by the right combustion chamber 34 in addition to the gas pressure of the entire housing 31 when the igniter 39 is actuated (gas pressure generated by combustion in the left combustion chamber 33). It has a pressure rise characteristic due to the gas pressure due to combustion, and the airbag is rapidly inflated using the equilibrium pressure of these gas pressures as the maximum pressure Pmax.
- the airbag is generated only in the left combustion chamber 33 at the initial stage of deployment, and starts gently inflating and deploying with a small amount of clean gas with suppressed pressure rise. , 34, and rapidly expands and expands due to a large amount of clean gas having a predetermined pressure characteristic and a maximum pressure Pmax.
- the gas generator Y2 for the passenger seat or side collision shown in FIGS. 11 and 12 will be described.
- the gas generator Y 2 shown in FIGS. 11 and 12 is different from the gas generator Y 1 shown in FIG. 9 in that the configuration of the housing 31 and the partition member 35 and the inner cylindrical member 32 are used in both combustion chambers 33. , 34 are different, and the same members as those in FIGS. 9 and 10 are denoted by the same reference numerals, and redundant description is omitted.
- the gas generator Y 2 shown in FIGS. 11 and 12 is composed of a long cylindrical outer cylinder 62 with an open end, and a lid member 41 for closing the open end of the outer cylinder 62.
- the housing 31 is formed by joining the annular rib 41b formed on the outer peripheral end of the lid member 41 and the open end of the outer cylinder 62 by butt welding (for example, friction welding) to form a sealed space S inside.
- the structure is formed.
- the gas discharge holes 62a of the number of excretions are formed for each gas hole row r1, r2.
- a projection 62 b protruding into the closed space S ⁇ is formed on the bottom of the outer wall 62.
- Lining material 32 is arranged inside the housing 31.
- the material 3 2 defines the sealed space S of the housing 3 1 as a combustion space S 1 on the inner peripheral side of the inner cylindrical member 32, and a gas passage space between the outer periphery thereof and the inner periphery of the outer cylinder 62.
- Question S2 the sealed space S of the housing 3 1 as a combustion space S 1 on the inner peripheral side of the inner cylindrical member 32, and a gas passage space between the outer periphery thereof and the inner periphery of the outer cylinder 62.
- the inside of the combustion space S1 of the interior material 32 is defined by left and right two combustion chambers 33, 34 by a partition member 35 press-fitted into the interior material 32.
- Each of the combustion chambers 33, 34 ⁇ ⁇ is loaded with a gas generating agent 36, and a filter member 37 is disposed in the inner cylindrical member 32 so as to surround the gas generating agent 36.
- Each of the filter members 37 is fitted into the projections 6 2 b and the projections 41 a of the lid member 41 together with the inner member 32, and the partition members 35 are extended at the ends extending to the partition members 35. It is pinched.
- the combustion chambers 33, 34 are structured so that they can pass each other quickly through the filter member 37, the gas passage hole 32a of the inner cylinder member 32, and the gas passage space S2. I have.
- the igniters 45 and igniters 45 of the igniters 38 and 39 are fixed by caulking to the ⁇ member 41 and the protrusions 6 2 b, and the transfer agent 44 is provided with a flanged cam 46. Therefore, it is provided so as to face the igniter 45.
- the flanged cap 46 on the side of the member 41 has its leading end 46c abutted and fixed to a burr 62c formed when the outer cylinder 62 and the lid member 41 are welded together.
- 6 4 is the lid member 4 1 side cap 4 6 flange 4 6 c and the combustion chamber 3 4 filter member 3 7 It is a ⁇ ⁇ ⁇ -shaped seal plate interposed between the ends.
- the collision sensor detects the collision of the car and only the igniter 38 on the left combustion chamber 33 is activated, the combustion gas generated in the left combustion chamber 33 becomes the filter member as in ⁇ 9. After the slag is captured and cooled in 37, it is homogenized in the gas passage space S2, and then the release into the airbag is started.
- the ignition device 39 of the right combustion chamber 34 is actuated with a slight time lag, and the combustion of the gas generating agent 36 in the right combustion chamber 34 begins.
- the airbag is shifted to rapid inflation and deployment by a large amount of gas released from the combustion chambers 33 and 34.
- Combustion is performed with the entire volume of the housing 1 that communicates with the left combustion chamber 33 in the ⁇ -passing space S2, as in the case of the combustion chamber 33, so that clean gas released into the airbag is released.
- the pressure rises with the gas pressure due to combustion in the right combustion chamber 34.
- the airbag will be inflated rapidly.
- the deployment control of the airbag can be easily performed.
- the gas generator ⁇ 3 shown in FIGS. 13 and 14 is different from the gas generator ⁇ 1 shown in FIG. 9 in that the configuration of the housing 31 and the inner cylindrical member 32 and the filter member 37 are used in both combustion chambers 3 3 , 34 are different, and the same members as those in FIGS. 9 and 10 are denoted by the same reference numerals, and redundant description is omitted.
- the gas generator ⁇ 3 shown in FIGS. 13 and 14 is constructed by butt-welding the annular ribs 4 1b of the shuttle member 41 to the both open ends of the long cylindrical outer cylinder 82 (for example, friction welding). ) To form a housing 31 that forms a closed space S in the upper part. As in FIG. 10 (a), the outer cylinder 82 is provided with a plurality of gas discharge holes 82a for each gas hole row r1, r2. Inside the housing 31, an inner cylindrical member 32 and a filter member 37 loaded in the inner cylindrical member 32 are arranged between each of the small members 41.
- the filter member 37 is fitted into the convex portion 41 a of each member 41 together with the cylindrical member 32, and the sealed space S of the housing 31 is divided into the outer periphery of the inner cylindrical member 32 and the inner portion of the outer cylinder 82. And a combustion space S1 on the inner peripheral side of the filter member 37.
- the combustion space S ⁇ of the filter member 37 ⁇ is defined by the partition member 35 into two combustion chambers 33, 34 on the left and right sides in the axial direction of the housing 31.
- the partition member 35 has a cylindrical portion 35 A inserted in the inner periphery of the filter member 37, and the opening of the cylindrical portion 35 A on the combustion chamber 33 side is closed by a disk 35 B.
- the combustion chambers 33 and 34 are defined. With this, each combustion chamber 3 3. 3 4
- the structure is such that they communicate with each other through a filter member 37 or a finoleta member 37, an inner cylindrical member 32, and a gas passage space S2. And each combustion chamber
- Gas generating agent 36 is loaded in 33, 34.
- the igniters of the igniters 38, 39 are provided on each lid member 41.
- each flanged cap 46 has its flange 46 c tip abutting and fixed to a burr 82 c formed at the time of welding the outer cylinder 82 to each lid material 41.
- the collision sensor detects the collision of the vehicle and only the igniter 38 on the left combustion chamber 33 is activated, the combustion gas generated in the left combustion chamber 33 is filtered by the filter member 3, as in FIG. After the slag is collected and cooled in step 7, the gas is made uniform in the gas passage space S2 and then released into the airbag.
- part of the combustion gas generated in the left combustion chamber 33 flows out into the right combustion chamber 34 through the filter member 37, the gas passage space S2, etc.
- the filter member 37 and the gas passage space fTOf are cut and adjusted to obtain an appropriate pressure rise characteristic.
- the combustion of the gas generating agent 36 in the right combustion chamber 34 starts.
- the airbag is moved to rapid inflation and deployment by a large amount of clean gas released from both combustion chambers 33 and 34.
- the combustion in the right combustion chamber 34 is performed in the same manner as the left combustion chamber 33 because the entire housing 31 communicated with the left combustion chamber 33 by the filter member 37 or the like.
- the clean gas released into the airbag has a pressure rise characteristic due to the gas pressure generated by combustion in the combustion chamber 34 in addition to the gas pressure of the entire housing 31 when the igniter 39 is operated. Assuming that the equilibrium pressure of the gas pressure is the maximum pressure Pmax, the airbag is inflated and deployed rapidly.
- the passenger-side or side-collision gas generator Y3 can easily control the deployment of the airbag, similarly to the passenger-side or side-collision gas generator Y1 in FIG.
- the airbag can safely perform its original function.
- the gas generators Y 1 -Y 3 for the passenger seat or side collision also have the same configuration as the gas generators XI to X 3 for the driver's seat, depending on the type of collision of the vehicle. It controls the movement. That is, in a high-speed head-on collision, etc., each of the igniters 38, 39 is activated simultaneously, and in a moderate collision, each of the igniters 38, 39 is activated with a small time difference. Then, by operating only one igniter 38, the deployment mode of the airbag is selected in the same manner as the driver-side gas generators X1 to X3.
- the gas generating agent 36 in the left combustion chamber 33 is burned, the gas generating agent 36 in the right combustion chamber 3 is burned.
- the present invention is not limited to this, and the left combustion chamber 33 may be burned after the right combustion chamber 34 is burned. Also, by changing the type of each of the combustion chambers 33, 34, one can be made larger and the other smaller, so that the ignition is performed from the side of the large-capacity combustion chamber.
- the cushion member 25 shown in FIG. 1 may be arranged so as to contact the cutting member 35. This prevents powdering of the gas generating agent 36 and heat transfer between the combustion chambers 33 and 34 in the same manner as the driver's seat gas generators X 1 to X 3 in FIGS. 1 to 5. It is possible to control the airbag deployment appropriately.
- Each of the above gas generators X 1 to X 3 and Y 1 to Y 3 is shown as having two combustion chambers 3, 4, 33, 34 formed by partition members 5, 35, but is not limited to this. Instead, the number of partition members 5, 35 is changed to define three or more combustion chambers, and igniters are installed in each of the combustion chambers to control the deployment of airbags in multiple stages. You can do it.
- FIG. 15 shows a comparison between the pressure increase characteristics and the maximum pressure of the gas generator according to the embodiment of the present invention and the gas generator as a comparative example.
- the gas generator of the embodiment includes two igniters that define two combustion chambers by communicating with each other and can independently and forcibly ignite the gas generating agent in each combustion chamber (see H11 to FIG. 14). ).
- two combustion chambers are hermetically sealed and defined, and two igniters capable of independently and forcibly igniting the gas generating agent in each combustion chamber are available.
- Fig. 15 (a) in the gas generator of the embodiment, the pressure rise tends to be suppressed as the minute time difference t for operating each igniter becomes longer. Was confirmed. Also, the maximum pressure P ma can be suppressed lower as the minute time difference t for activating the igniter becomes longer. This is considered to be due to the fact that the combustion chambers communicate with each combustion chamber and the combustion in each combustion chamber is performed with a large volume of the entire housing.
- the maximum pressure P max is controlled to be substantially the same regardless of the interrogation time t when each igniter is activated. It is not possible to reduce the gas pressure of ma X to a degree that does not give an impact to the crew. Therefore, even if the airbag is inflated and deployed in two stages, the airbag will ultimately be deployed and inflated at a relatively high pressure (maximum pressure Pmax), which may give impact to the occupant. . In particular, it is considered that there is a danger in the case of a moderate or ⁇ collision of a car. Industrial applicability
- the gas kiln device according to the present invention is useful for inflating and expanding the airbags for the driver's seat, the passenger's seat, and the side collision.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99917222A EP1090817A4 (en) | 1999-04-28 | 1999-04-28 | GAS GENERATOR |
KR10-2000-7014860A KR100417766B1 (ko) | 1999-04-28 | 1999-04-28 | 가스발생기 |
US09/719,563 US6485051B1 (en) | 1999-04-28 | 1999-04-28 | Gas generator |
PCT/JP1999/002291 WO2000066402A1 (fr) | 1999-04-28 | 1999-04-28 | Générateur de gaz |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1999/002291 WO2000066402A1 (fr) | 1999-04-28 | 1999-04-28 | Générateur de gaz |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000066402A1 true WO2000066402A1 (fr) | 2000-11-09 |
Family
ID=14235598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/002291 WO2000066402A1 (fr) | 1999-04-28 | 1999-04-28 | Générateur de gaz |
Country Status (4)
Country | Link |
---|---|
US (1) | US6485051B1 (ja) |
EP (1) | EP1090817A4 (ja) |
KR (1) | KR100417766B1 (ja) |
WO (1) | WO2000066402A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002051673A1 (fr) * | 2000-12-26 | 2002-07-04 | Nippon Kayaku Kabushiki-Kaisha | Generateur de gaz |
US6857658B2 (en) * | 2001-03-15 | 2005-02-22 | Daicel Chemical Industries, Ltd. | Gas generator for air bag and air bag apparatus |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ298910B6 (cs) * | 1999-02-05 | 2008-03-12 | Nippon Kayaku Kabushiki-Kaisha | Vyvíjec plynu |
JP2001163171A (ja) * | 1999-12-10 | 2001-06-19 | Nippon Kayaku Co Ltd | ガス発生器 |
JP2001180428A (ja) * | 1999-12-27 | 2001-07-03 | Daicel Chem Ind Ltd | エアバッグ用ガス発生器及びエアバッグ装置 |
JP4215163B2 (ja) * | 2002-01-03 | 2009-01-28 | オートモーティブ システムズ ラボラトリー インコーポレーテッド | エアバッグインフレータ |
US7467588B2 (en) * | 2002-12-09 | 2008-12-23 | Daicel Chemical Industries, Ltd. | Gas generator for air bag |
US6886856B2 (en) * | 2003-04-01 | 2005-05-03 | Key Safety Systems, Inc. | Dual stage inflator |
US7438313B2 (en) * | 2003-08-06 | 2008-10-21 | Arc Automotive, Inc. | Compact multi-level output gas generator |
US20050029785A1 (en) * | 2003-08-06 | 2005-02-10 | Arc Automotive, Inc. | Compact multi-level output hybrid gas generator |
US7204512B2 (en) * | 2004-01-28 | 2007-04-17 | Automotive Systems Laboratory, Inc. | Multi-stage inflator with sympathetic ignition enhancement device |
US7044502B2 (en) * | 2004-02-24 | 2006-05-16 | Key Safety Systems, Inc. | Dual stage pyrotechnic driver inflator |
US7413216B2 (en) * | 2004-02-27 | 2008-08-19 | Daicel Chemical Industries, Ltd. | Gas generator for an air bag |
US7267365B2 (en) * | 2004-03-10 | 2007-09-11 | Automotive Systems Laboratory, Inc. | Inflator |
US7367584B2 (en) * | 2004-04-19 | 2008-05-06 | Automotive Systems Laboratory, Inc. | Gas generating system |
US7343862B2 (en) * | 2004-05-27 | 2008-03-18 | Automotive Systems Laboratory, Inc. | Gas generating system |
US7438315B2 (en) | 2004-05-28 | 2008-10-21 | Automotive Systems Laboratory, Inc. | Inflator and method of assembly |
US7814838B2 (en) | 2004-06-28 | 2010-10-19 | Automotive Systems, Laboratory, Inc. | Gas generating system |
US7275760B2 (en) * | 2004-07-23 | 2007-10-02 | Automotive Systems Laboratory, Inc. | Multi-chamber gas generating system |
US7237801B2 (en) * | 2004-08-31 | 2007-07-03 | Automotive Systems Laboratory, Inc. | Gas generating system |
US20060186654A1 (en) * | 2005-01-28 | 2006-08-24 | Daicel Chemical Industries, Ltd. | Gas generator for air bag |
US7537240B2 (en) * | 2005-02-22 | 2009-05-26 | Automotive Systems Laboratory, Inc. | Gas generating system |
US7654565B2 (en) | 2005-06-02 | 2010-02-02 | Automotive Systems Laboratory, Inc. | Gas generating system |
WO2007005824A2 (en) | 2005-06-30 | 2007-01-11 | Automotive Systems Laboratory, Inc. | Gas generator |
US7600783B2 (en) * | 2005-07-08 | 2009-10-13 | Daicel Chemical Industries, Ltd. | Gas generator |
US9700825B2 (en) | 2006-09-21 | 2017-07-11 | Acs Industries, Inc. | Expanded metal filters |
EP2073999B1 (en) * | 2006-09-21 | 2016-02-24 | ACS Industries, Inc. | Method for making a filter and filter |
US10717032B2 (en) | 2006-09-21 | 2020-07-21 | Acs Industries, Inc. | Expanded metal filters |
US8453575B2 (en) * | 2006-10-09 | 2013-06-04 | Herakles | Pyrotechnical method for dual-mode gas generation and related pyrotechnical generator |
KR100863633B1 (ko) * | 2006-10-31 | 2008-10-15 | 현대자동차주식회사 | 차량용 에어백의 복합뇌관 장치 및 그 제어방법 |
US8444179B2 (en) * | 2006-12-06 | 2013-05-21 | Trw Vehicle Safety Systems Inc. | Dual stage air bag inflator |
IL184216A0 (en) * | 2007-06-25 | 2008-01-06 | Rafael Advanced Defense Sys | Two-stage airbag inflation system with pyrotechnic delay |
US7950691B1 (en) | 2007-10-31 | 2011-05-31 | Tk Holdings, Inc. | Inflator body with adapter form end |
DE102009052565A1 (de) * | 2009-11-10 | 2011-05-12 | GM Global Technology Operations LLC, Detroit | Airbagmodul für ein Fahrzeug |
JP2011218942A (ja) * | 2010-04-08 | 2011-11-04 | Daicel Chemical Industries Ltd | ガス発生器とその組立方法 |
JP6543560B2 (ja) * | 2015-11-26 | 2019-07-10 | 株式会社ダイセル | ガス発生器 |
DE102016213002B4 (de) * | 2016-07-15 | 2019-02-14 | Joyson Safety Systems Germany Gmbh | Gasgenerator für ein Gassackmodul eines Fahrzeuginsassen-Rückhaltesystems und Verfahren zum Herstellen eines Gasgenerators |
JP6930981B2 (ja) | 2016-08-29 | 2021-09-01 | 株式会社ダイセル | ガス発生器 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3029326U (ja) * | 1995-03-22 | 1996-09-27 | モートン インターナショナル,インコーポレイティド | 多段式エアバッグ膨張装置 |
JP3033792U (ja) * | 1996-06-04 | 1997-02-07 | 日本化薬株式会社 | エアバッグ用ガス発生器 |
JPH09183359A (ja) * | 1995-11-08 | 1997-07-15 | Temic Bayern Chem Airbag Gmbh | ガス発生器を多段点火する装置 |
JP3040049U (ja) * | 1996-01-30 | 1997-08-05 | モートン インターナショナル,インコーポレイティド | 適応性のあるエアバッグ膨張装置 |
JPH10297416A (ja) * | 1997-04-25 | 1998-11-10 | Matsushita Electric Ind Co Ltd | エアバッグ装置用ガス発生装置及びエアバッグ膨張方法 |
JPH1159318A (ja) * | 1997-08-25 | 1999-03-02 | Nippon Kayaku Co Ltd | ガス発生器 |
JPH1191494A (ja) * | 1997-09-18 | 1999-04-06 | Nippon Kayaku Co Ltd | ガス発生器 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6189924B1 (en) * | 1997-11-21 | 2001-02-20 | Autoliv Asp, Inc. | Plural stage inflator |
US6032979C1 (en) * | 1998-02-18 | 2001-10-16 | Autoliv Asp Inc | Adaptive output inflator |
US6019389A (en) * | 1998-03-31 | 2000-02-01 | Trw Vehicle Safety Systems Inc. | Air bag inflator |
US6168200B1 (en) * | 1998-12-01 | 2001-01-02 | Atlantic Research Corporation | Dual level inflator |
CZ298910B6 (cs) * | 1999-02-05 | 2008-03-12 | Nippon Kayaku Kabushiki-Kaisha | Vyvíjec plynu |
US6227565B1 (en) * | 1999-03-04 | 2001-05-08 | Trw Inc. | Air bag inflator with pressure regulation |
US6257617B1 (en) * | 1999-03-04 | 2001-07-10 | Trw Inc. | Air bag inflator with pressure regulation |
US6315322B1 (en) * | 1999-03-05 | 2001-11-13 | Trw Inc. | Air bag inflator |
US6189927B1 (en) * | 1999-12-16 | 2001-02-20 | Autoliv Asp, Inc. | Adaptive output inflator |
-
1999
- 1999-04-28 US US09/719,563 patent/US6485051B1/en not_active Expired - Fee Related
- 1999-04-28 EP EP99917222A patent/EP1090817A4/en not_active Withdrawn
- 1999-04-28 WO PCT/JP1999/002291 patent/WO2000066402A1/ja active IP Right Grant
- 1999-04-28 KR KR10-2000-7014860A patent/KR100417766B1/ko not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3029326U (ja) * | 1995-03-22 | 1996-09-27 | モートン インターナショナル,インコーポレイティド | 多段式エアバッグ膨張装置 |
JPH09183359A (ja) * | 1995-11-08 | 1997-07-15 | Temic Bayern Chem Airbag Gmbh | ガス発生器を多段点火する装置 |
JP3040049U (ja) * | 1996-01-30 | 1997-08-05 | モートン インターナショナル,インコーポレイティド | 適応性のあるエアバッグ膨張装置 |
JP3033792U (ja) * | 1996-06-04 | 1997-02-07 | 日本化薬株式会社 | エアバッグ用ガス発生器 |
JPH10297416A (ja) * | 1997-04-25 | 1998-11-10 | Matsushita Electric Ind Co Ltd | エアバッグ装置用ガス発生装置及びエアバッグ膨張方法 |
JPH1159318A (ja) * | 1997-08-25 | 1999-03-02 | Nippon Kayaku Co Ltd | ガス発生器 |
JPH1191494A (ja) * | 1997-09-18 | 1999-04-06 | Nippon Kayaku Co Ltd | ガス発生器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1090817A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002051673A1 (fr) * | 2000-12-26 | 2002-07-04 | Nippon Kayaku Kabushiki-Kaisha | Generateur de gaz |
US6857658B2 (en) * | 2001-03-15 | 2005-02-22 | Daicel Chemical Industries, Ltd. | Gas generator for air bag and air bag apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP1090817A4 (en) | 2005-03-30 |
US6485051B1 (en) | 2002-11-26 |
KR20010106140A (ko) | 2001-11-29 |
EP1090817A1 (en) | 2001-04-11 |
KR100417766B1 (ko) | 2004-02-05 |
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