Cylindrical gas generator

Abstract

The invention discloses a cylindrical gas generator. The cylindrical gas generator comprises a cylindrical shell, the ignition device is fixed at the upstream end of the cylindrical shell; the gas generating agent is close to the ignition device; an inner nozzle engaged with an inner wall of the cylindrical housing; the scrap collecting tank is arranged at the downstream end of the internal nozzle; the screen tank is located at the end, away from the internal nozzle, of the scrap collecting tank; the forming end plate is fixed to the end, away from the scrap collecting tank, of the screen tank; the rupture disk assembly 44 clamping assembly is fixed on an outlet hole of the forming end plate; and the diffuser is located at the downstream end of the rupture disk assembly 44 clamping assembly, an output hole is formed in the diffuser, and combustion products are discharged into the air bag through the output hole. According to the invention, the optimization of performance output, component weight and outline including total length and outer diameter is realized, the characteristics and optimization enable the gas generator to be more suitable for the modern electric automobile technology, and the competitive advantage of the gas generator in the design of the existing automobile gas generator is improved.

Description

Technical Field

[0001] The present invention relates to a gas generator assembly for an air bag or other safety devices, in particular to a cylindrical gas generator for a vehicle. Background Art

[0002] Existing airbag gas generators have various shapes, with the latest version adopting a pancake-shaped structure. Newly designed vehicles, especially electric vehicles (EVs), have very limited installation space for airbag components, so a cylindrical gas generator component with a smaller outer diameter is required.

[0003] Based on this, technicians in this field have proposed a cylindrical gas generator, which provides a new solution to the above technical problems. Summary of the invention

[0004] In view of the problems raised in the above background technology, the present invention provides a cylindrical gas generator, which aims to optimize the performance output range while meeting structural and safety requirements, and can provide repeatable performance, meet standard changes, and meet industry standards.

[0005] The present invention adopts the following technical solution:

[0006] The cylindrical gas generator provided by the present invention specifically comprises:

[0007] Cylindrical housing;

[0008] an ignition assembly 1 fixed to the upstream end of the cylindrical housing;

[0009] a gas generating charge located in the cylindrical housing and adjacent to the ignition assembly 1;

[0010] an inner nozzle engaged with the inner wall of the cylindrical housing through which combustion products flow;

[0011] a tank body disposed at the downstream end of the internal nozzle, the outer wall of the tank body being provided with a plurality of radial holes, the internal nozzle being used to direct the combustion products to the tank body, and an annular channel being formed between the outer diameter of the tank body and the inner wall of the cylindrical shell;

[0012] A central exhaust component 1 is fixed to the downstream end of the cylindrical shell, and the central exhaust component 1 includes a central channel opened adjacent to the tank body and an outlet channel for guiding the exhaust of combustion products.

[0013] Preferably, the junction between the inner nozzle, the inner wall of the cylindrical shell and the tank body forms a turning point and a particle collection area for combustion products.

[0014] Preferably, a toothed structure is provided on the outer surface of the can body, and the combustion products flow through the toothed structure to the upstream end of the first central exhaust component.

[0015] Preferably, the outlet channel is arranged at a 90-degree angle relative to the central channel.

[0016] Preferably, the first central exhaust component includes two outlet channels spaced 180 degrees apart.

[0017] Preferably, it further includes a bursting disc assembly fixed at the end of each outlet channel before the cylindrical gas generator is activated.

[0018] Preferably, it further includes a bursting disc assembly fixed at the end of the outlet channel before the cylindrical gas generator is activated.

[0019] Preferably, the outer diameter of the cylindrical housing is not greater than millimeters.

[0020] Preferably, it further includes an auxiliary housing fixed at one end of the first central exhaust component away from the cylindrical housing.

[0021] Preferably, it further includes:

[0022] A second-stage housing fixed at one end of the first central exhaust component away from the cylindrical housing;

[0023] A first second-stage ignition component fixed at the upstream end of the second-stage housing;

[0024] A second-stage gas-generating propellant arranged in the second-stage housing and adjacent to the first second-stage ignition component;

[0025] A second-stage internal nozzle joined to the inner wall of the second-stage housing;

[0026] A second-stage can body arranged at the downstream end of the second-stage internal nozzle.

[0027] Preferably, it further includes an internal filter arranged between the can body and the first central exhaust component, and a plurality of filter holes are formed in the internal filter.

[0028] A cylindrical gas generator, comprising:

[0029] A cylindrical housing;

[0030] An internal component located inside the cylindrical housing, the internal component including a first ignition component, a gas-generating propellant, an internal nozzle, and a can body located at the downstream end of the internal nozzle;

[0031] A first central exhaust component fixed at the downstream end of the cylindrical housing, the first central exhaust component including a central channel opened near the can body and an outlet channel for guiding the discharge of combustion products;

[0032] At least six turns of a tortuous path for combustion products are formed between the internal component and the first central exhaust component.

[0033] Preferably, a diffuser is fixed outside the first central exhaust component, and an exhaust port is provided on the diffuser, and the combustion products are discharged into the airbag through the exhaust port.

[0034] Preferably, a plurality of radial holes are provided on the outer wall near the upstream end of the tank body, the internal nozzle is used to direct the combustion products to the tank body, and an annular channel is formed between the outer diameter of the tank body and the inner wall of the cylindrical shell.

[0035] Preferably, the six turns include: the first turn is set as a reverse turn one at the downstream end of the tank body; the second turn is set as a turn two from inside the tank body through the radial hole; the third turn is set as a turn three into the annular channel after passing through the radial hole; the fourth turn is set as a turn four at the welding joint of the first central exhaust component and the cylindrical shell; the fifth turn is set as a turn five when entering the central channel of the first central exhaust component; the sixth turn is set as a turn six when entering the outlet channel from the central channel.

[0036] Preferably, the tortuous path further includes a seventh turn of the tortuous path in the direction of the diffuser exhaust port from the outlet channel after contacting the diffuser.

[0037] Preferably, the first central exhaust component includes two outlet channels spaced 180 degrees apart.

[0038] Preferably, a rupture disc assembly is further fixed at the end of each of the outlet channels.

[0039] Preferably, an auxiliary housing is further fixed at one end of the first central exhaust component away from the cylindrical shell.

[0040] Preferably, it further includes:

[0041] A second-stage housing fixed at one end of the first central exhaust component away from the cylindrical shell;

[0042] A first second-stage ignition assembly fixed at the upstream end of the second-stage housing;

[0043] A second-stage gas-generating propellant provided in the second-stage housing and adjacent to the first second-stage ignition assembly;

[0044] A second-stage internal nozzle joined to the inner wall of the second-stage housing;

[0045] The second-stage tank body provided at the downstream end of the second-stage internal nozzle.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The cylindrical gas generator provided by the present invention realizes the optimization of performance output, component weight, and outer contour such as total length and outer diameter. These characteristics and optimizations make it more suitable for modern electric vehicle technology and future autonomous driving vehicles, and improve its competitive advantage in the existing automotive gas generator design.

[0048] 2. The present invention adopts a tortuous path gas flow channel system, which reduces the particulate matter level discharged from the gas generator while meeting its performance objectives, and has good practicability.

[0049] 3. The cylindrical gas generator provided by the present invention optimizes the performance output range, meets the structural and safety requirements at the same time, and can provide repeatable performance, standard-compliant variations, and meet industry standards, which is conducive to popularization. Description of the Drawings

[0050] In order to more clearly illustrate the solutions in the present invention, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 Shows the structural schematic of the cylindrical gas generator and its internal components Figure 1 ;

[0052] Figure 2 Shows the structural schematic of the cylindrical gas generator and its internal components Figure 2 ;

[0053] Figure 3 Is an embodiment showing a single-stage gas generator assembly;

[0054] Figure 4 Shows the particulate collection area of the combustion products;

[0055] Figure 5 Shows the tortuous path of the combustion products;

[0056] Figure 6A Shows the structural schematic of the central exhaust component I Figure 1 ;

[0057] Figure 6B Shows the structural schematic of the central exhaust component I Figure 2 ;

[0058] Figure 7A Shows a schematic diagram of the mechanical crimping fixing method of the diffuser;

[0059] Figure 7B Shows a schematic diagram of the laser welding fixing method of the diffuser;

[0060] Figure 8A Shows a schematic diagram of the structure of the diffuser 147;

[0061] Figure 8B Shows a schematic diagram of the structure of the diffuser 247;

[0062] Figure 8C Shows a schematic diagram of the structure of the diffuser 347;

[0063] Figure 9A Shows a schematic diagram of the structure of the reference design including a spring and a screen;

[0064] Figure 9B Shows a schematic diagram of the double-cup design;

[0065] Figure 9C Shows a schematic diagram of the design of the tank body with a spring;

[0066] Figure 9D Shows a schematic diagram of the design including a filter, a deflector and a spring;

[0067] Figure 10 Shows an embodiment of the present invention with an internal filter screen;

[0068] Figure 11 Shows an embodiment of a single-stage generator assembly of the present invention with an internal filter screen;

[0069] Figure 12 Shows an embodiment change of the improved ignition component I and the gas-generating propellant fixing scheme of the present invention.

[0070] The markings in the figure are explained as follows:

[0071] 1. Steering One; 2. Steering Two; 3. Steering Three; 4. Steering Four; 5. Steering Five; 6. Steering Six; 7. Steering Seven; 10. Dual-stage Gas Generator Assembly One; 12. Cylindrical Housing; 14. Ignition Assembly One; 16. Cover Disk; 18. Igniter Body; 20. Transfer Gunpowder; 22. Gas-generating Gunpowder; 24. Internal Nozzle; 26. Tank Body; 28. Radial Hole; 30. Annular Channel; 32. Tooth-like Structure; 34. Spring; 35. Filter; 36. Screen; 37. Cup; 38. Central Exhaust Component One; 39. Deflector; 40. Central Channel; 42. Outlet Channel; 44. Burst Disk Assembly; 46. Outer Surface; 47. Diffuser; 10'. Single-stage Gas Generator Assembly One; 48. Auxiliary Housing; 50. Inert Gas Mixture; 136. Internal Filter Screen; 138. Filter Screen Hole; 13. Fixing Piece; A1. Region One; A2. Region Two; A3. Region Three; 100. Dual-stage Gas Generator Assembly Two; 100'. Single-stage Gas Generator Assembly Two; 114. Ignition Assembly Two; 238. Central Exhaust Component Two. Detailed Embodiment

[0072] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0073] Figure 1 and Figure 2 An exemplary dual-stage gas generator assembly one 10 and its internal components are shown. The dual-stage gas generator assembly one includes a cylindrical housing 12 and an ignition assembly one 14 fixed to the upstream end of the cylindrical housing 12.

[0074] In a preferred embodiment, the outer diameter of the cylindrical housing 12 is less than or equal to 40 mm, for example, 35.6 mm.

[0075] The ignition assembly one 14 includes a cover disk 16 or a similar structure, which is pressed into the cylindrical housing 12 and engages with its inner surface. The ignition assembly one 14 also includes an igniter body 18. The cover disk 16 and the igniter body 18 together fix the ignition assembly one 14. The structure, function, and operation of the ignition assembly one 14 are prior art and will not be described in detail here. Any suitable ignition assembly one 14 can be used for the dual-stage gas generator assembly one 10 in the embodiments of the present invention.

[0076] The transfer gunpowder 20 is located near the cover disk 16, and the gas-generating gunpowder 22 is located inside the cylindrical housing 12, near the ignition assembly one 14 and the transfer gunpowder 20.

[0077] The inner nozzle 24 directs the combustion products towards the downstream end of the canister 26, as Figure 1 and Figure 2 shown. The nozzle 24 engages with the inner wall of the cylindrical housing 12, and the inner nozzle 24 may be integrally formed with the canister 26.

[0078] The canister 26 includes radial holes 28 formed near the upstream end thereof. Continuing to refer to Figure 1 and Figure 2 , an annular passage 30 is formed between the outer diameter of the canister 26 and the inner wall of the cylindrical housing 12, and a toothed structure 32 is provided at the outer downstream end of the canister 26, and the combustion products flow along the toothed structure 32.

[0079] In an alternative embodiment, the position where the gas generating charge 22 is located inside the cylindrical housing 12 is defined as a gas generating chamber, and a spring 34 may be fixed between the inner nozzle 24 and the gas generating charge 22 to fix the gas generating charge 22 in the gas generating chamber.

[0080] In an alternative embodiment, a screen 36 may be inserted between the spring 34 and the gas generating charge 22 according to the size of the gas generating charge 22.

[0081] Other alternative components may be used to fix the gas generating charge 22 in the gas generating chamber, such as a formed cup with a filtered top, etc. Examples are shown in Figures 9A - 9D , Figure 9A shows a reference design including the spring 34 and the screen 36; Figure 9B shows a double-cup design where the cup 37 is used to fix the gas generating charge 22; Figure 9C shows a design of the canister 26' with the spring 34; Figure 9D shows a design with the filter 35, the deflector 39 and the spring 34.

[0082] Continuing to refer to Figure 1 and Figure 2 , the central exhaust member 38 is fixed to the downstream end of the cylindrical housing 12. The central exhaust member 38 includes a central passage 40 formed adjacent to the canister 26 and at least one outlet passage 42 for guiding the combustion products out of the gas generator assembly; Figure 1 and Figure 2 show two outlet passages 42 in which the outlet passages 42 may be spaced 180 degrees apart and the outlet passages 42 are arranged at a 90-degree angle with respect to the central passage 40.

[0083] Figure 6A and 6BShows a perspective view of the first central exhaust component 38, which is preferably fixed to the downstream end of the cylindrical housing 12 by welding. The central channel 40 connects the first-stage generator assembly of the dual-stage gas generator assembly 10 ( Figure 1 and Figure 2 the left side of the first central exhaust component 38 therein) with the second-stage generator assembly ( Figure 1 and Figure 2 the right side of the first central exhaust component 38 therein). An inert gas mixture can be shared between the first-stage generator assembly and the second-stage generator assembly through the central channel 40, and the performance output of each stage of the generator can be achieved. The first central exhaust component 38 also provides an interface for filling the inert gas mixture into the gas generator assembly during the production process.

[0084] A rupture disc assembly 44 is fixed at the end of each outlet channel 42. The rupture disc assembly 44 includes a support and a rupture disc body. Continuing to refer to Figure 6A and 6B , the outer surface 46 of the first central exhaust component 38 can be machined into a flat surface to facilitate the installation of the rupture disc assembly 44. In some embodiments, the first central exhaust component 38 includes a surface for welding the dual rupture disc assembly 44, and these rupture disc assemblies serve as the gas outlets for the performance output during the inflation process. In other embodiments, the first central exhaust component 38 includes a surface for welding a single rupture disc assembly 44.

[0085] An external diffuser 47 is fixed outside the first central exhaust component 38, Figure 7A and 7B shows the way of fixing the diffuser 47, which is used to fix the diffuser 47 so as to disperse the performance output during the airbag inflation process. Figure 7A shows the way of mechanical crimping, Figure 7B shows the way of laser welding. In another alternative, the ways of mechanical crimping and laser welding can be used simultaneously.

[0086] Figures 8A - 8C Shows three exemplary diffusers 47 for dispersing the output of the gas generator during the airbag inflation process to adapt to the inflation of the airbag by the gas generator in different application scenarios. Figure 8A Shows an external diffuser 147 that can perform 360-degree output in a certain embodiment, including a plurality of exhaust holes arranged circumferentially and axially symmetrically along the diffuser 147; Figure 8B Shows an external diffuser 247 that can perform 180-degree output in a certain embodiment, including symmetric exhaust holes opened on both sides for double exhaust on both sides; Figure 8CShows an external diffuser 347 capable of directional output in an embodiment, including asymmetrically arranged exhaust holes that can maintain a thrust-neutral state to make it recoil-free, thus contributing to error prevention during the inflation process.

[0087] The second-stage gas generator of the gas generator assembly ( Figure 1 and Figure 2 on the right side of the central exhaust component 38) includes the same components and structure as the first-stage gas generator.

[0088] Figure 3 Shows an exemplary single-stage gas generator assembly 10', in which the second-stage gas generator in the two-stage gas generator embodiment is replaced by an auxiliary housing 48. The auxiliary housing 48 can store inert gases for pressurization, such as a mixture 50 of argon and helium. The auxiliary housing 48 can share the inert gas with the single-stage gas generator assembly through the central exhaust component 38.

[0089] Figure 4 Shows the collection area of combustion particles to prevent combustion particles from escaping from the gas generator assembly. After ignition, the combustion products enter the canister 26 through the internal nozzle 24. The downstream end of the canister 26 is closed, and the combustion particles can be collected at the end of the canister 26 (area A1). Then the combustion products continue to flow and contact the downstream end of the canister 26 and are redirected to move in the reverse direction through the radial holes 28 into the annular channel 30. The second particle collection area (area A2) is located at the corner between the internal nozzle 24 and the canister 26. Then the combustion products continue to flow along the annular channel 30. The third collection area (area A3) is located at the position where the cylindrical housing 12 is friction-welded internally with the central exhaust component 38. The combustion particles are collected at the downstream end of the cylindrical housing 12 in the third particle collection area (area A3), where the central exhaust component 38 is fixed. The arrangement of multiple particle collection areas significantly reduces the particles generated by combustion and can effectively prevent any particles from escaping from the gas generator assembly into the airbag.

[0090] Figure 5 Shows a tortuous path of the combustion products. In some embodiments, the internal components and the central exhaust component 38 form a tortuous path with at least six turns for the movement trajectory of the combustion products. Refer to Figure 5, after the first ignition assembly 14 is activated, the gas-generating propellant 22 is ignited by the first ignition assembly 14 and starts to burn inside the cylindrical housing 12. The combustion products flow through the screen 36 and the spring 34, and then enter the canister 26 through the internal nozzle 24. When the flowing combustion products contact the downstream end of the canister 26, the flow direction makes a 180-degree turn to form the first turn 1. Since the radial holes 28 are located near the upstream end of the canister 26, after turning at the downstream end of the canister 26, the combustion products flow out through the radial holes 28; the second turn is the second turn 2 formed when the combustion products flowing out of the canister 26 through the radial holes 28 make a 90-degree turn; the third turn is the third turn 3 formed when the combustion products make a 90-degree turn towards the friction-welded joint between the cylindrical housing 12 and the first central exhaust component 38 when flowing from the radial holes 28 into the annular channel 30; then the combustion products continue to flow and contact the friction-welded area, and make a fourth 90-degree turn through the toothed structure 32 to form the fourth turn 4; then, the combustion products enter the central channel 40 of the first central exhaust component 38 and make a fifth turn to form the fifth turn 5; then the combustion products flow through the outlet channel 42 to the rupture disc assembly 44 and make a sixth turn to form the sixth turn 6; the seventh turn occurs when the combustion products contact the inner diameter of the diffuser 47 after passing through the rupture disc assembly 44 and make a 90-degree turn towards the exhaust port direction of the diffuser 47 to form the seventh turn 7, and then the combustion products are discharged into the airbag. The rupture disc assembly 44 is fixed to the outside of the first central exhaust component 38 by laser or friction welding to provide a sealing function, and its laser or friction-welded structure provides the robustness required for safety and sealing requirements.

[0091] Figure 10 Shows the changes of the dual-stage gas generator assembly two 100 and its internal components in another embodiment. In the shown changes, an internal filter screen 136 is provided between the canister 26 and the first central exhaust component 38 and is also spaced apart from the inner wall of the cylindrical housing 12. The remaining components are the same as those Figure 1 and Figure 2 described in. The internal filter screen 136 is fixed to the downstream end of the canister 26 by an interference fit. The internal filter screen 136 can add two additional collection areas for the debris of combustion particles. The internal filter screen 136 includes a plurality of filter holes 138. In some embodiments, the filter holes 138 are arranged in an interlaced or offset manner.

[0092] Figure 10 Also shows an external fixing member 13 that can be used for fixing the gas generator module. In one embodiment, the fixing member 13 can be a fixing stud, and these external fixing members 13 are applicable to any described embodiment.

[0093] Figure 11 Shows a single-stage gas generator assembly two 100' including an internal filter screen 136 located at the downstream end of the canister 26.

[0094] The internal filter screen 136 provides additional turns for the tortuous path of the combustion products and a further collection area for the debris of the combustion particles. After the combustion products flow out of the canister 26 through the radial holes 28 and enter the space between the cylindrical housing 12 and the canister 26, they enter the internal filter screen 136 through the filter screen holes 138, making a 90-degree turn. Then, the combustion products continue to flow through the internal filter screen 136 and enter the central passage 40 of the central exhaust component 38, making another 90-degree turn.

[0095] Figure 12 Shows variations with improved components. The ignition component 114 can include an igniter body in an all-metal form or, as shown, a semi-metal and semi-molded component. The primer 20 can be modified to a primer assembly 220 with the primer 20 provided inside to protect the primer 20. As shown, the primer assembly 220 can include a container 222 with a lid to protect the primer 20 from rupture. Figure 12 The variations shown also include an improved internal filter screen 236 with its overall height reduced to optimize the internal volume for facilitating the assembly of the internal components.

[0096] In addition, the central exhaust component 238 can be modified to accommodate the variations of the rupture disc assembly 44 and its support. The rupture disc assembly 44 can be a cross-shaped disc so that it can open in a "petal shape". This design reduces the possibility of the debris of the rupture disc assembly 44 being discharged into the airbag. Figure 12 The support of the rupture disc assembly 44 shown can be modified to accommodate a rupture disc assembly 44 with a larger diameter.

[0097] The gas generator assembly described in the present invention achieves the optimization of performance output, component weight, and profile such as total length and outer diameter, etc. These characteristics make it suitable for electric vehicle technology. The tortuous path defined by the internal components can reduce the particulate matter level discharged from the gas generator assembly while achieving the performance goals. The central exhaust component connects the gas generators of two stages in a two-stage gas generator structure and can also be modified to a single-stage gas generator assembly. The cylindrical gas generator assembly provides repeatable performance, compliant variations, and meets industry standards.

[0098] In some embodiments, a cylindrical gas generator assembly provided by the present invention uses a first-stage ignition assembly one and a second-stage ignition assembly one, which are located at both ends of the dual-stage gas generator assembly. By directly acting on the transfer powder 20, the ignition device is activated. The transfer powder 20 then ignites the gas-producing chamber, and the gas-producing agent 22 and the stored gas mixture undergo internal combustion, and the internal pressure begins to rise. The relationship between the first-stage ignition assembly one, the second-stage ignition assembly one, the transfer powder 20, and the gas-producing agent 22 can be adjusted in performance through delayed activation, where the delay duration is greater than or equal to 0.

[0099] The first-stage ignition assembly one and the second-stage ignition assembly one follow the same process and can be started simultaneously or with a delay.

[0100] As the gas-producing agent 22 burns and mixes with the stored gas in the cylindrical housing 12, the combustion products pass through a series of media and channels, which serve as collection areas for the larger particles generated during the combustion process. The main medium is the spring 34 with a top spiral closure, which serves as the abutting end face for loading the gas-producing agent and also provides a surface to block the larger particles. The secondary medium is the internal filter screen 136, which is designed to intercept particulate matter and provide an attachment surface for the particulate matter generated by combustion.

[0101] Although the present invention has been described in connection with the presently considered most practical and preferred embodiments, it should be understood that the present invention is not limited to the disclosed embodiments. On the contrary, the present invention is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.

[0102] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are shown in the drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure made by using the content of the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, is equally within the scope of the patent protection of the present invention.

Claims

1. A cylindrical gas generator, characterized in that: include: A cylindrical housing (12); an ignition assembly (14) fixed to the upstream end of the cylindrical housing (12); a gas generating agent (22) located within the cylindrical housing (12) and adjacent to the ignition assembly (14); an internal nozzle (24) engaged with the inner wall of the cylindrical housing (12), through which combustion products flow; a tank body (26) disposed at the downstream end of the internal nozzle (24), the outer wall of the tank body (26) being provided with a plurality of radial holes (28), the internal nozzle (24) being used to direct the combustion products to the tank body (26), and an annular channel (30) being formed between the outer diameter of the tank body (26) and the inner wall of the cylindrical outer shell (12); A central exhaust component (38) is fixed to the downstream end of the cylindrical shell (12), and the central exhaust component (38) includes a central channel (40) opened adjacent to the tank body (26) and an outlet channel (42) for guiding the exhaust of combustion products.

2. A cylindrical gas generator according to claim 1, characterized in that: The junction of the inner nozzle (24), the inner wall of the cylindrical housing (12) and the tank (26) forms a turning point and a particle collection area for combustion products.

3. A cylindrical gas generator according to claim 1, characterized in that: The outer surface of the tank body (26) is provided with a tooth-like structure, and the combustion products flow through the tooth-like structure toward the upstream end of the central exhaust component (38).

4. A cylindrical gas generator according to claim 1, characterized in that: The outlet channel (42) is arranged at a 90-degree angle relative to the central channel (40).

5. A cylindrical gas generator according to claim 4, characterized in that: The central exhaust component (38) includes two outlet passages (42) spaced 180 degrees apart.

6. A cylindrical gas generator according to claim 5, characterized in that: It also includes a bursting disc assembly (44) fixed to the end of each outlet channel (42) before the cylindrical gas generator is activated.

7. A cylindrical gas generator according to claim 1, characterized in that: Also included is a bursting disc assembly (44) fixed to the end of the outlet passage (42) before the cylindrical gas generator is activated.

8. A cylindrical gas generator according to claim 1, characterized in that: The outer diameter of the cylindrical housing (12) is no greater than 40 mm.

9. A cylindrical gas generator according to claim 1, characterized in that: It also includes an auxiliary housing (48) fixed to an end of the central exhaust component (38) away from the cylindrical housing (12).

10. A cylindrical gas generator according to claim 1, characterized in that: Also includes: A second stage housing fixed to an end of the central exhaust component (38) away from the cylindrical housing (12); a second stage ignition assembly one fixed to the upstream end of the second stage housing; a second-stage gas generating charge disposed in the second-stage housing and adjacent to the second-stage ignition assembly; a second stage internal nozzle engaged with an inner wall of the second stage housing; A second stage tank is disposed at the downstream end of the second stage internal nozzle.

11. A cylindrical gas generator according to claim 10, characterized in that: It also includes an internal filter (136) disposed between the tank body (26) and the central exhaust component (38), wherein the internal filter (136) is provided with a plurality of filter holes (138).

12. A cylindrical gas generator, characterized in that: include: A cylindrical housing (12); An internal assembly located within the cylindrical housing (12), the internal assembly comprising an ignition assembly (14), a gas generating agent (22), an internal nozzle (24), and a tank body (26) located at a downstream end of the internal nozzle; A central exhaust component (38) fixed to the downstream end of the cylindrical housing (12), the central exhaust component (38) comprising a central passage (40) opened near the tank (26) and an outlet passage (42) for guiding the exhaust of combustion products; A circuitous path for combustion products is formed between the inner assembly and the central exhaust component (38) with at least six turns.

13. The cylindrical gas generator according to claim 12, characterized in that: A diffuser (47) is fixed on the outside of the central exhaust component (38), and an exhaust port is opened on the diffuser (47), and the combustion products are discharged into the airbag through the exhaust port.

14. The cylindrical gas generator according to claim 13, characterized in that A plurality of radial holes (28) are provided on the outer wall of the tank body (26) near the upstream end, and the internal nozzle (24) is used to direct the combustion products to the tank body (26). An annular channel (30) is formed between the outer diameter of the tank body (26) and the inner wall of the cylindrical shell (12).

15. The cylindrical gas generator according to claim 14, characterized in that The six turns include: a first turn is set as a reverse turn one (1) at the downstream end of the tank body (26); a second turn is set as a turn two (2) from the inside of the tank body (26) through the radial hole (28); a third turn is set as a turn three (3) after passing through the radial hole (28) and entering the annular channel (30); a fourth turn is set as a turn four (4) at the welding point between the central exhaust component one (38) and the cylindrical shell (12); a fifth turn is set as a turn five (5) occurring when entering the central channel (40) of the central exhaust component one (38); and a sixth turn is set as a turn six (6) occurring when entering the outlet channel (42) from the central channel (40).

16. The cylindrical gas generator according to claim 15, characterized in that The circuitous path also includes a turn seven (7) for a seventh turn from the outlet passage (42) toward the exhaust port of the diffuser (47) after contacting the diffuser (47).

17. The cylindrical gas generator according to claim 12, characterized in that: The central exhaust component (38) includes two outlet passages (42) spaced 180 degrees apart.

18. The cylindrical gas generator according to claim 17, characterized in that It also includes a bursting disc assembly (44) fixed at the end of each outlet channel (42).

19. The cylindrical gas generator according to claim 12, characterized in that: It also includes an auxiliary housing (48) fixed to an end of the central exhaust component (38) away from the cylindrical housing (12).

20. The cylindrical gas generator according to claim 12, characterized in that Also includes: A second stage housing fixed to an end of the central exhaust component (38) away from the cylindrical housing (12); a second stage ignition assembly one fixed to the upstream end of the second stage housing; a second-stage gas generating charge disposed in the second-stage housing and adjacent to the second-stage ignition assembly; a second stage internal nozzle engaged with an inner wall of the second stage housing; A second stage tank is disposed at the downstream end of the second stage internal nozzle.

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