• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The inflator (10) comprises a rupture cap (20) comprising a bottom (21) and a sleeve-like side wall (22), the bottom (21) and the side wall (22) defining an igniter compartment ( 23), and the cap (20), in the inactive mode, being pressurized on the outer peripheral side with compressed gas having a filling pressure (PF) which, at a maximum operating temperature of the inflator (10), has a pressure maximum filling (PFmax), and in which the cap (20) can be destroyed by burst pressure on the compartment side during operation. A transition portion (24) is formed from the side wall (22) of the cap (20) to the bottom (21) so that the compartment side burst pressure necessary to destroy the cap (20) is less than the sum of the maximum filling pressure (PFmax) and the filling pressure (PF).
    公开号:FR3023761A1
    申请号:FR1556850
    申请日:2015-07-20
    公开日:2016-01-22
    发明作者:Lorenz Seidl
    申请人:TRW Airbag Systems GmbH；
    IPC主号:
    专利说明:

    [0001] The invention relates to a rupture cap, in particular for a hybrid inflator, comprising a bottom and a wall. The invention relates to a rupture cap, in particular for a hybrid inflator, comprising a bottom and a wall. The invention relates to a rupture cap, particularly for a hybrid inflator, comprising a bottom and a wall. sleeve-shaped sidewall defining an igniter compartment within the rupture cap, the rupture cap being adapted to be pressurized with compressed gas on its outside in the inactive mode and, in the event of operation, being adapted to be destroyed by bursting pressure on the side of the igniter compartment. In addition, the invention relates to a hybrid inflator, an airbag module and a vehicle security system. In addition, the invention relates to a method for making a rupture cap. Occupant restraint systems for motor vehicles usually comprise air bag modules including an airbag which, in the event of a crash, is inflated to reduce the likelihood of body parts of a vehicle occupant. hit a component of the vehicle. In order to inflate the airbag in the event of a collision, for example, hybrid inflators consisting of a compressed gas reservoir containing compressed gas and / or fluids and a pyrotechnic subassembly are provided. pyrotechnic assembly for triggering and / or heating gas which is originally compressed and escapes in the event of operation. The compressed gas of such a hybrid inflator can be sealed in a pressure-tight manner to the pyrotechnic sub-assembly by a rupture diaphragm or by a rupture cap which, in an inactive mode, can thus be or is put under pressure on its outer peripheral side with compressed gas stored in the compressed gas tank. The term "inactive mode" herein means that the hybrid inflator has not yet been activated, or in other words, that the rupture cap is in an inactive position in which no activation signal is yet provided. in response to which the burst cap must be opened or burst. WO 01/13484 A1, particularly Figure 8, illustrates a rupture cap described above which is incorporated into a hybrid inflator. The cup-shaped rupture cap comprises a bottom which, at its boundary area, is converted into a sleeve-shaped side wall and / or is integrally connected thereto forming a radius. The bottom and the sleeve-shaped sidewall define an igniter compartment in which an igniter is housed, wherein, in an inactive mode, the rupture cap may be or is pressurized with compressed gas on its outer peripheral side . In the event of operation, the burst cap can be destroyed by bursting pressure at the igniter chamber side by activating the igniter. The rupture cap has a continuously constant material thickness. Such a hybrid inflator thus comprises a compressed gas reservoir which can be filled, for example, at room temperature, with gas or a gaseous mixture having a predetermined pressure, for example 580 bar (1 bar: 1.105 Pa), for example, during the manufacture of the hybrid inflator. Such a pressure or filling pressure can increase, in the inactive mode of the hybrid inflator, in the so-called high temperature case, by heating the interior of the vehicle, for example at 90 ° C., by solar radiation up to a pressure of maximum filling of approximately 800 bars. When an airbag is triggered, the pyrotechnic subassembly opens the diaphragm that breaks. closes the compressed gas reservoir or rupture cap which closes the compressed gas reservoir so that pre-compressed gas in the compressed gas reservoir inflates the airbag, in which the pre-compressed gas may be nitrogen, argon, helium or oxygen and / or a mixture of two or more of said gases. In the case of operation in which the rupture cap must be opened by activating an igniter, said igniter provided for this purpose must accumulate a burst pressure on the igniter compartment side which is significantly greater than the predominant filling pressure in the compressed gas tank. The igniter must not only accumulate the pressure required for the destruction of the rupture cap, when it is considered isolated in itself, but in addition must "counteract" the predominant filling pressure in the compressed gas reservoir, ie that is to say, control such a back pressure in order to cause the destruction of the rupture cap when it is incorporated in such a hybrid inflator.
    [0002] Since the pressure in such a compressed gas reservoir can increase up to approximately 800 bar, as described above, extremely high rupture pressures have been necessary so far to open closure diaphragms and / or to open a rupture cap. Therefore, both a burst cap closing the gas tank and an optionally provided diaphragm are subjected to the high pressure on the side of the compressed gas reservoir in the inactive mode so that a burst cap is exposed, for example , extreme deformation and bending and can support and rely on other components of the hybrid inflator or gas module thus possibly having a negative effect. In addition, and additionally, the burst cap must be very sturdy by having a material thickness appropriate to withstand the maximum fill pressure described above in the inactive mode.
    [0003] An object of the present invention is to provide a rupture cap further developed to overcome the disadvantages mentioned above. In particular, it is described a rupture cap which, with respect to the known prior art, is subjected to smaller deformations and / or can be opened with less bursting pressure from the igniter . Another object is to develop a hybrid inflator such that a bursting or opening pressure of a burst cap can be reduced. In addition, the object of the invention is to provide an airbag module and a vehicle safety system comprising a hybrid inflator more developed and an improved rupture cap. Also, the object of the present invention is to provide a method for making a rupture cap. According to the invention, this object is achieved with respect to the rupture cap according to claim 1, with respect to the hybrid inflator according to claim 7 or 9, with respect to the airbag module according to claim 13, with respect to vehicle security system according to claim 14 and the method for producing a rupture cap according to claim 15. The advantageous and expedient configurations of the hybrid inflator according to the invention and the rupture cap according to the invention are described in US Pat. the subclaims. The invention is based on the idea of providing a rupture cap, in particular for a hybrid inflator, comprising a bottom and a sleeve-shaped side wall, the bottom and the sleeve-shaped side wall delimiting a compartment. igniter inside the rupture cap and the rupture cap, in the inactive mode, being adapted to be pressurized on its outside with compressed gas and, in the event of operation, the rupture cap being adapted to be destroyed by bursting pressure on the igniter compartment side. According to the invention, a transition portion from the side wall to the bottom is formed so that the bottom is pressurized externally, a part of the bottom side of the igniter compartment can rely on a part of the side wall side lighter compartment. Therefore, the invention is based on the idea of forming the transition from the sidewall to the bottom so that the bottom can be pressurized externally with compressed gas and the bottom does not need to be supported by other components. The bottom and the rupture cap are respectively formed to be almost self-supporting in idle mode. The transition portion is preferably formed so that the bottom of the rupture cap, particularly its lighter side, can be simply supported towards its own vertical side wall, in particular towards a portion of the side of its compartment. lighter. In other words, because of the particular configuration of a transition portion to the side wall arranged substantially perpendicular to the bottom, in idle mode, the bottom can be supported on the side wall, the cap of fracture is formed to be self-supporting, i.e., the burst cap need not be supported by another component of the hybrid inflator when it is pressurized with compressed gas in idle mode. Therefore, it is possible to prevent the rupture cap from inadvertently and detrimentally leaning against another component such as an igniter. By the configuration according to the invention, in particular by the self-supporting design of the rupture cap, the rupture cap according to the invention can be opened, on the one hand, with significantly lower bursting pressures on the side of the igniter , that this is the case with the rupture caps known from the prior art. Apart from this, the same rupture cap according to the invention, on the other hand, may still have a relatively high crushing pressure from a compressed gas reservoir of a hybrid inflator filled with compressed gas. , as is known from the prior art rupture caps incorporated in such a hybrid inflator. This fact will be described in more detail below. Advantageously, the rupture cap is formed integrally, in particular by transformation, preferably by stamping and / or bending and / or extrusion and / or stamping. Such a one-piece configuration saves manufacturing costs over a multi-piece break cap in which a bottom has to be connected, for example, welded, to a side wall. The bottom or side wall of the rupture cap may comprise, at least in parts, a groove-like recess having a groove bottom, the recess preferably being provided on the outer peripheral side or substantially parallel to a longitudinal axis of the groove. rupture cap. The groove-like recess may be a groove-like recess or stamp. Preferably, the recess or groove-like recess or recess is formed on the bottom surface facing away from the igniter compartment, but may also be positioned on a surface of the side wall. opposed to the igniter compartment, advantageously in the region of the transition portion. The groove bottom is the deepest point or the deepest surface part of the recess / recess / stamping. In other words, the groove bottom of the recess is the point closest to the opposite bottom surface or bottom side or side wall, and respectively to the nearest surface portion. The recess may for example be circular and / or semi-circular and / or cross-shaped and / or double C-shaped and / or I-shaped and / or wave-shaped in the bottom of the rupture cap. In addition, the recess in the side wall may also be circular and / or semicircular. In the transition part, at least in parts, a side surface of the igniter compartment side wall may have a curved shape, in particular a convex shape, preferably such that between the bottom portion of the igniter compartment side and the side of the side wall of the igniter compartment, a fold having a tip is formed. In other words, the transition portion inside the rupture cap may have a fold, from the bottom to the side wall, at least in parts, the fold comprising a tip. The tip is the deepest point of the fold. Preferably, the deepest point of the fold or the tip is formed in the immediate vicinity of the bottom of the rupture cap. The tip may also define the transition point from the sidewall to the bottom, particularly from the sidewall area of the igniter compartment side to the bottom portion of the igniter compartment side. The bend may be formed throughout the inner periphery between the bottom portion of the igniter compartment side and the sidewall side of the igniter compartment side. It is conceivable that the bottom portion of the igniter compartment side and in particular the convexly extending surface of the side wall of the igniter compartment form the fold boundary faces. Therefore, the curved, in particular convex, shape of the side surface of the igniter compartment side wall may be delimited by the side portion of the igniter compartment side. In other words, the curved, in particular convex, shape of the igniter compartment side surface terminates at a boundary portion of the igniter compartment side portion of the bottom. If the rupture cap is integrally formed, the curved, in particular convex, shape of the igniter compartment side surface can be transformed into a boundary portion of the bottom side compartment side of the igniter compartment. . The shape of the fold in the transition portion of the burst cap may also be referred to as a bellows shape or as a bellows. From the tip, a weakened area to the nearest surface portion of the outer peripheral side rupture cap may be formed. The weakened zone of the rupture cap is the zone or part defining and having, respectively, the smallest wall thickness or rupture cap thickness and which is destroyed or exploded when a burst pressure on the side igniter compartment is applied. In other words, in the weakened zone, the area of the rupture cap breaks when the burst pressure is applied. The surface portion on the outer peripheral side that is closest to the tip may be a surface of the side wall of the outer peripheral side and / or the groove bottom. Therefore, the weakened zone can be formed from the tip to a surface portion or surface point closest to the outer peripheral side, the outermost surface portion of the outer peripheral side being able to be the outer surface surface. closer to the side wall of the outer peripheral side and / or the groove base closest to the bottom or the side wall, the weakened zone being adapted to be circumferential in one embodiment of the invention, that is, that the weakened area can be formed at the entire inner periphery of the igniter compartment side.
    [0004] The transition portion may be inwardly or outwardly bend shaped at least in part, the inward and / or outward shaping reinforcing the transition portion so that in the Inactive, the bottom rests on the side wall and no additional support against other components or elements of the hybrid inflator is needed. In addition, it is possible that the wall thickness of the break cap in the transition portion is smaller than the bottom liner compartment side portion and / or the liner compartment side area of the side wall. Therefore, the tip can describe or define the area of the smallest wall thickness of the rupture cap. The hybrid inflator according to the invention comprises a rupture cap having a bottom and a sleeve-shaped side wall, the bottom and the side wall defining an igniter compartment. In idle mode, the burst cap is pressurized with compressed gas at a fill pressure that has a maximum fill pressure at a maximum operating temperature of the hybrid inflator. During operation, the burst cap can be destroyed by bursting pressure on the igniter compartment side. According to the invention, a transition portion is formed from the side wall of the rupture cap to the bottom so that the bursting pressure of the igniter compartment side necessary to destroy the rupture cap is less than the sum of the maximum filling pressure and the filling pressure. Therefore, a rupture cap comprises at least one bottom and a sleeve-like sidewall, the inside of the burst cap serving as an igniter compartment, wherein the outer surface of the break cap in the inactive mode is pressurizing with compressed gas preferably provided in a compressed gas tank. The case of operation describes the case of the trigger, that is to say the case in which compressed gas provided in a compressed gas reservoir is provided for inflating and respectively inflates an airbag and therefore the cap The bursting pressure must be destroyed by bursting pressure on the igniter compartment side.
    [0005] The invention is therefore based on the idea of forming a transition portion from the side wall of the rupture cap to the bottom so that bursting pressure of the igniter compartment side necessary to destroy the rupture cap is less than the sum of the maximum filling pressure and the filling pressure. The sum of the maximum fill pressure and the fill pressure is a computable auxiliary variable, as will be described hereinafter. The filling pressure is the temperature-dependent pressure in the compressed gas tank which, because of the different operating temperatures of the hybrid inflator, can fit into the inactive mode in a vehicle. For example, a vehicle in which the hybrid inflator is incorporated is exposed to a functional temperature range usually from minus 40 degrees Celsius to plus 90 degrees Celsius. Therefore, the filling pressure in the compressed gas tank continuously increases to a temperature of -40 ° C to + 90 ° C until it reaches its maximum filling pressure in the inactive mode, at + 90 ° C, that is to say the maximum functional temperature of the hybrid inflator. The calculable variable mentioned above, "the sum. the maximum filling pressure and the filling pressure "can thus be illustrated or understood as being the filling pressure (temperature dependent) increased by the level of the maximum possible filling pressure. In addition, the hybrid inflator according to the invention can be configured so that the rupture cap is connected, in particular welded, to an igniter holder so that a pyrotechnic igniter protrudes into the igniter compartment of the igniter holder. rupture cap and rupture cap protrudes into the interior of a compressed gas tank. To connect and / or weld the rupture cap to an igniter support, the rupture cap may comprise a radially projecting collar, the collar being preferably formed at the end, in particular the vertical end, of the sidewall facing away from the bottom of the rupture cap. During operation, i.e., upon ignition of the hybrid inflator, the igniter compartment is in fluid communication or adapted to be in fluid communication with the interior of the compressed gas reservoir. Due to the destruction or bursting of the rupture cap, compressed gas or pre-compressed gas present in the compressed gas reservoir can flow into the airbag by a shock wave triggered by the destroying the rupture cap passing through the compressed gas reservoir to open another rupture diaphragm closing the compressed gas reservoir so that the airbag is inflated. With regard to the airbag module, the object is achieved by the features of claim 13. Such an airbag module according to the invention may comprise a rupture cap according to the invention and or a hybrid inflator according to the invention. With regard to the vehicle security system, the object is achieved by the features of claim 14. Accordingly, a vehicle security system comprises a rupture cap according to the invention and / or a hybrid inflator according to the invention and / or an airbag module according to the invention. Similar advantages are obtained to those already explained together with the rupture cap according to the invention and / or with the hybrid inflator according to the invention. With regard to a method for producing a rupture cap, in particular a rupture cap 10 according to the invention, the object is achieved by the features according to claim 15. Therefore, a blanking cap blank is provided with a fold during a process of deformation under horizontal pressure and / or inward shaping and / or shrinking, in particular by transformation, preferably by deep drawing and / or bending and / or extrusion and / or stamping, and or with a pleat having a point between the bottom liner compartment side portion and the liner compartment side area of the side wall. It is conceivable to configure the fold comprising the tip over the entire periphery and / or over the entire inner periphery. Also, one can imagine an embodiment or a formation of the fold in certain areas. In addition, it is conceivable that the break cap according to the invention is made in two parts, i.e., a bottom member is connected to a side wall member. Within the scope of the process according to the invention, the rupture cap blank may be provided to be equipped with bead-shaped inward and / or outward shaping, inward and outward shaping. or bead-shaped outer being formed in the transition portion from the side wall of the break cap to the bottom, preferably the outer peripheral side.
    [0006] Hereinafter, the invention is illustrated in detail by means of the embodiments with reference to the accompanying drawings, in which: Fig. 1a is a sectional view of an igniter-side zone of a hybrid inflator according to invention comprising a rupture cap according to the invention without pressurizing the rupture cap with compressed gas according to a first embodiment; FIG. 1b shows a sectional view of an igniter-side zone of a hybrid inflator according to the invention comprising a rupture cap according to the invention with pressurization of the rupture cap with compressed gas according to the first embodiment. of achievement; Figure 2 shows a second embodiment of a rupture cap according to the invention; Figure 3a shows a third embodiment of a rupture cap according to the invention; FIG. 3b represents a fourth embodiment of a rupture cap according to the invention; FIG. 4 is a schematic diagram for a compressed gas reservoir side pressure of a rupture cap according to the prior art and according to the invention and for a gas filling pressure in the compressed gas reservoir; Figure 5 is a schematic diagram for an igniter-side burst pressure of a burst cap without gas filling in the compressed gas tank, comparing the prior art with the invention; and Fig. 6 is a schematic diagram for an igniter-side bursting pressure of a bursting cap with gas filling in the compressed gas tank, comparing the prior art and the invention. Hereinafter, the same reference numerals for like parts or working parts of the same. 35 ways are used. In Fig. La, an igniter-side region of a hybrid inflator 10 according to the invention comprising a rupture cap 20 is illustrated. The hybrid inflator 10 comprises a compressed gas reservoir 11 having an interior 12. For the sake of clarity, a complete representation of the compressed gas reservoir 11, that is to say a closure of the compressed gas reservoir, has been dispensed with. 11 pressure-tight upward. In Figure la, the interior 12 is not pressurized; that is, no pre-compressed gas has yet been introduced into the interior 12 and only ambient atmospheric pressure is acting. In addition, an igniter support 13 and an igniter 14 are shown. The rupture cap 20 is sealingly connected, in particular welded, to the igniter support to ensure sealing for compressed gas intended for sealing. to be placed in the interior 12 of the compressed gas reservoir 11. In addition, an easily compressible lining ring 15 arranged at the radial periphery of the rupture cap is shown which merely serves as a volume compensation for a filling. fuel, not shown here, since it can be provided in the form of known compressed molds. The rupture cap 20 comprises a bottom 21 and a sleeve-shaped side wall 22. The bottom 21 and the side wall 22 define a rupture cap interior and, respectively, an igniter compartment 23. FIG. the inactive mode of the hybrid inflator 10 in which no signal to activate the hybrid inflator has yet been provided. As already described, in FIG. 1a, the rupture cap 20 is not yet pressurized with compressed gas on its outside, that is to say on the part of the interior 12 of the gas tank. 11. This is also clear from, among others, FIG. 1a, from the fact that the bottom 21 of the rupture cap 20 is in an almost horizontal position, in which in its central zone it is not only slightly biased or preformed in the direction of the igniter 14. On the other hand, in Figure lb, the bottom 21 of the rupture cap 20 is clearly curved in the direction of the igniter 14, as will be described In more detail below, because in Fig. 1b, the rupture cap is pressurized with pre-compressed gas on its outside. In Fig. La, the bottom 21 of the rupture cap 20 comprises a groove-like recess or groove 26 on its outer periphery, i.e. on the outer surface 25. The groove-like recess 26 is formed in the direction of the boundary zone 27 of the bottom 21 over the entire periphery, for example, of circular shape, according to Figure la. The groove bottom 28 of the groove-shaped recess 26 constitutes the surface portion of the outer face 25 of the bottom 21 which is the closest to the opposite inner face 29 of the bottom 21. The transition portion 24 of the bottom 21 at the side wall 22, comprises a fold 32 at least in parts so that the bottom 21, in the inactive mode shown, is supported on the side portion 22 specially arranged vertically and the rupture cap 20 is formed to be self-supporting.
    [0007] It is also shown a bead-shaped outward shaping 31 in the transition portion 24, for example the limit area 27 of the bottom 21 is reinforced on its outer peripheral side in the transition portion 24 towards the side wall 22 In the transition portion 24 of the rupture cap 20 of the igniter compartment side, the fold 32 which is progressively narrowed and has a tip 33, is formed at least in portions in the side wall 22. The tip 33 forms the point the deepest of the fold 32 in the side wall 22 and respectively in the surface 34 igniter compartment side of the side wall 22. The fold 32 and the tip 33 are formed over the entire inner periphery, for example over the entire periphery of the liner compartment surface 34 of the side wall 22. The bend 32 is formed by a curved shape, i.e. a convex shape, of the igniter-side surface 34 of the side wall 22 The fold 32 and the shape of the fold 32 may also be referred to as bellows. According to Embodiment 1a, the tip 33 is formed on the vertical extension of the groove bottom 28. That is, the vertical line passing through the groove bottom 28 extends perpendicular to the tip 33 and cut the latter. The fold 32 is delimited and is respectively formed by the surface 34 igniter side extending convexly of the side wall 22 and the inner face 29, in particular the peripheral boundary zone of the inner face 29, the bottom 21. In in other words, the bend 32 comprising the tip 33 is formed between an igniter compartment side portion 40 of the bottom 21 and an igniter compartment side portion 50 of the side wall 22. The bottom side portion of the compartment side portion igniter and the zone 50 of the side wall 22 of the igniter compartment side are adjacent to each other in the tip 33 and respectively in contact with each other.
    [0008] From tip 33, a weakened zone 35 is formed on the surface portion closest to the rupture cap 20 of the outer peripheral side. The outermost surface portion of the outer peripheral side is formed by the groove bottom 28 of the bottom 21 according to the illustrated embodiment. In other words, the weakened area 35 is the area of the rupture cap 20 having the smallest component thickness or wall thickness. If, in the igniter compartment 23, a burst pressure is generated, the weakened zone 35 is destroyed and, respectively, the weakened zone 35 bursts so that the igniter compartment 23 is or may be in fluid communication with the interior 12 of the compressed gas reservoir 11. Therefore, the bottom 21 is torn at the sleeve-shaped sidewall 22 due to the weakened zone 35 formed so that the rupture cap 20 is destroyed by particularly along the weakened zone 35 and a fluid communication is established between the igniter compartment 23 and the interior 12. The rupture cap 20 further comprises a radially projecting collar 36 serving as a gastight connection or gas-tight welding of the rupture cap 20 to the igniter holder 13. During operation, for example if a signal to activate the hybrid inflator is provided, the igniter 14 must generate a burst pressure in order to open the break cap 20 from the outside. In this context, "outside" means the igniter side or the igniter compartment 23. Since the bottom 21 of the rupture cap 20 in the idle mode is pressurized with a high internal pressure, for example with high pressure. compressed gas which predominates in the interior 12, the bottom 21 can be supported on the side wall 22 formed substantially vertically. It is not necessary for it to rely on the igniter 14 or other elements of the hybrid inflator 10 in this case. Therefore, the rupture cap 20 is configured to be self-supporting. In FIG. 1b, as in FIG. 1a, an igniter side portion of a hybrid inflator 10 according to the invention comprising a rupture cap 20 according to the invention is shown, in this case, the rupture cap 20 being set under pressure with gas compressed on its outside, for example, from the inside 12 of the compressed gas reservoir 11. In other words, Figure lb represents the part of a hybrid inflator according to the invention shown in Figure la, but with the pressurization in the compressed gas reservoir 11 as is the case in a hybrid inflator 10 completely mounted according to the invention. With regard to the corresponding reference numbers and their meaning, the explanations relating to the embodiment according to claim la refer to it. As already described in the previous part, in FIG. 1b, the bottom 21 of the rupture cap 20 is definitively curved in the direction of the igniter 14, which is caused by the pressurization in the compressed gas tank 11. In FIG. 1b, the compressed gas reservoir 11 is filled with compressed gas which may be pre-compressed gas such as, for example, nitrogen, argon, helium or oxygen, or mixing two or more of said gases. The compressed gas reservoir 11 can be pressurized with a pressure of 580 bar at ambient temperature, in which said pressure can increase to about 800 bar in the case of high temperature, ie in a vehicle heated by the sun, in which the hybrid inflator is installed, up to 90 ° C. In the case of this maximum functional temperature of 90 ° C of the hybrid inflator, then a maximum filling pressure of 800 bar is reached in the inactive mode of the hybrid inflator.
    [0009] In FIG. 1b, the outside of the rupture cap 20, in particular the bottom 21 of the rupture cap 20, is pressurized in the inactive mode with the high pressure of the compressed gas which prevails in the interior 12, which cause the bottom 21 to curve toward the igniter compartment 23, since the igniter compartment 23 is not yet pressurized or simply that the atmosphere pressure predominates, because the igniter has not has not been activated or lit in the idle mode. In this regard, it is clear from FIG. 1b that in the fold area 32, the igniter compartment side portion 40 of the bottom 21 may abut the igniter compartment side area of the side wall 22. This The support takes place in a position or in an area which is positioned radially inwardly with respect to the groove bottom 28, i.e. in the direction of the center of the rupture disk or the longitudinal axis A. 20. It is not necessary in this case that the bottom relies on the igniter 14 and other elements of the hybrid inflator 10. The rupture cap 20 is formed to be almost self-supporting. As in Fig. 1a, Fig. 1b represents an inactive mode of the hybrid inflator 10 in which no signal to activate the hybrid inflator has been provided so far. In operation not shown here, the rupture cap 20 may be destroyed by a bursting pressure on the igniter compartment side, i.e., acting in the igniter compartment 23. FIG. another embodiment relating to a rupture cap 20 according to the invention. With regard to the same reference numerals and their meaning, the explanations concerning the embodiments according to Figs. 1a and 1b refer to them. Also initially, the rupture cap 20, in FIG. 2, comprises a bottom 21 and a sleeve-shaped side wall 22. The igniter compartment 23 is also shown. According to this embodiment also, a transition portion 24 is configured from the side wall 22 of the rupture cap 20 to the bottom 21. On the outer face 25 of the bottom 21, a groove-shaped recess 26 having a bottom groove 28 is formed, the groove-shaped recess 26 having a circular shape in the limit area 27 of the bottom 21. The groove bottom 28 is the part of the surface closest to the inner face 29 of the bottom 21. The part transition member 24 comprises a fold 32 which is formed such that, in the inactive mode, the bottom 21 bears against the substantially vertically formed side wall 22 and the rupture cap 20 and the bottom 21 are self-supporting . In the transition portion 24 of the burner cap 20 of the igniter compartment side, the surface 34 of the igniter compartment side wall 22 comprises a ply 32 having a tip 33. The ply 32 is progressively narrowed towards the tip 33. The fold 32 is formed by a curved path, i.e., a convex path, of the surface 34 of the sidewall 22 of the igniter compartment side. In the bottom boundary area 27, the break cap 20 is beaded outwardly shaped 31 which is formed into a bead-shaped inward shaping 37. Due to this double bead configuration of the transition portion 24, the bottom 21 can withstand very high pressures of the compressed gas acting on the outer peripheral side, when the bottom 21 is vertically supported on the sleeve-shaped side wall 22 and because of the shaping to The bead-shaped exterior 31 and the bead-shaped inward-forming 37 form a double-bump transition portion which can be highly compressed. Therefore, this also shows that the rupture cap 20 is self-supporting. In the illustrated embodiment, the weakened zone 35 is also formed from the tip 33 to the nearest surface portion of the rupture cap 20 of the outer peripheral side, i.e. groove 28 of the bottom 21. When the bursting pressure is applied to the igniter compartment 23 and therefore to the inner face 29 of the bottom 21, the weakened zone 35 between the tip 33 and the groove bottom 28 is consequently destroyed. FIG. 3a illustrates a third possible embodiment of a rupture cap 20 according to the invention. With respect to the same reference numerals and their meaning, the explanations concerning the embodiments according to Figs. 1a, 1b and 2 refer to them. The igniter compartment surface 34 of the side wall 22 has a curved shape, i.e. a convex shape, towards the bottom 21. The wall thickness of the side wall 23 decreases in the transition portion 24 corresponding to the trajectory of the igniter compartment surface 34 sidewall side 22 towards the bottom 21. Therefore, the side wall 22 comprises, in the area of the tip 33, the smallest wall thickness. From tip 33, a weakened zone 35 is formed toward the nearest surface portion of the rupture cap 20 of the outer peripheral side. The outermost surface portion of the outer peripheral side is a face 38 of the sidewall 22 of the outer peripheral side. When the igniter compartment 23 and the inner face 29 of the bottom 21 are pressurized, the bottom 21 is separated from the side wall 22, when the side wall 22 is broken or broken in the horizontal extension of the tip 33 and the bottom 21 can then separate from the side wall 22. With respect to the embodiment according to Figure 3a, the outward shaping configurations 31 or the bead-shaped inward shaping 37 are dispensed with. Nevertheless, in the transition part 24, the bottom 21 rests on the sleeve-shaped lateral wall 22 formed perpendicular to the bottom 21 so that the bottom 21 is simply slightly bent, when the pressure of the compressed gas is applied to the outer peripheral side, and the additional support against parts of the hybrid inflator 10 and / or the igniter 14 is not necessary. Figure 3b shows a fourth possible embodiment of a rupture cap 20 according to the invention. With reference to similar reference numerals and their meaning, the explanations of the embodiments according to Figs. 1a, 1b, 2 and 3a refer to them. The fourth embodiment of FIG. 3b substantially corresponds to the third embodiment described in FIG. 3a, however with a slight difference with respect to the embodiment of FIG. 3b which comprises a groove-shaped recess 26 having a base of FIG. groove 28. The transition portion 24 comprises a bead-shaped outward-shaping 31 in which the groove-shaped recess 26 is arranged radially, substantially perpendicular to the longitudinal axis A of the rupture cap 20. The recess groove form 26 and in particular its groove bottom 28 are preferably positioned so that they are provided substantially level with the point 33 of the fold 32 relative to the longitudinal axis A of the rupture cap 20. In the 3b, also, a weakened area 35 is formed which extends from the point 33 to the nearest surface portion of the forming. in other words, the embodiment of FIG. 3b can also be understood as a modification of the first embodiment of FIG. 1a according to which, according to FIG. 3b the groove-shaped recess 26 in Fig. 1a is arranged to be outwardly offset approximately 90 ° C from the position shown here, ie radially outwardly. along the outward molding shaped bead. In other words, the alignment of the groove-shaped recess 26 shown in FIG. 1a is offset, ie substantially parallel to the longitudinal axis A of the rupture cap 20, towards an alignment substantially perpendicular to the axis. longitudinal A of the rupture cap 20, as shown in Figure 3b. Following the pressurization of the igniter compartment 23 and the inner face 29 of the bottom 21, the bottom 21 is separated from the side wall 22 when the side wall 22 is broken or broken in the horizontal extension of the tip 33 and the bottom 21 can then separate from the side wall 22. FIG. 4 illustrates a diagram including a curve for a compressing pressure of the compressed gas reservoir side of a rupture cap according to the prior art and according to FIG. invention, and further a curve for a filling pressure PF in the compressed gas reservoir 11. At the horizontal axis of the diagram, a temperature scale ranging from -40 ° C to + 90 ° C corresponding to the common functional range of application of a hybrid inflator or inflator is marked. At the vertical axis, a pressure scale ranging from 0 bar to 1800 bar is marked.
    [0010] The lower curve in FIG. 4 represents the filling pressure PF in the compressed gas reservoir which depends on the temperature. In this case, the compressed gas reservoir was filled with a gas mixture of 97% argon and 3% helium at a pressure of 25 580 bar and at a temperature of 23 ° C (room temperature). so that the resulting curve (characteristic) results. At a maximum operating temperature of the hybrid inflator of + 90 ° C., a maximum filling pressure PF max of 800 bar is set in the compressed gas reservoir. The upper curve in FIG. 4 represents the crushing pressure or bursting pressure of a rupture cap on the side of the compressed gas reservoir of both the prior art and the invention. The term "crushing pressure on the side of the compressed gas reservoir" means in this case the following: a rupture cap mounted in a hybrid inflator, as shown for example in Fig. 1b of the invention in the inactive mode which must of course withstand, with respect to the structural strength, the filling pressure PF in the compressed gas reservoir which pressurizes the rupture cap of the outer peripheral side from the inside 12 of the compressed gas reservoir 11. In general, a rupture cap is designed with respect to said resistor so that a safety factor is always included which takes into account appropriate parameters such as component and pressure tolerances so that a rupture cap can not crash into idle mode. Nevertheless, when a hybrid inflator is designed, it is verified at which pressure, in the compressed gas reservoir, a rupture cap collapses from the structural point of view. Such a feature is now represented by the upper curve "crushing pressure (compressed gas reservoir side)" in FIG. 4. There is essentially no difference between the crush pressure of the rupture cap. of the prior art and the crushing pressure of the rupture cap 20 according to the invention, with regard to the rupture cap 20 according to the invention, if it is intended to replace a rupture cap of the Prior art and must be exchanged by the latter, it is supposed to imitate a nearly identical crush pressure characteristic and it is supposed not to crash at a lower filling pressure compared to a break cap of the art prior. A rupture cap of the prior art can be considered as being the rupture cap known from the document W01 / 13484 A2 already mentioned, here figure 8. Figure 5 represents a diagram comprising. 35 curves for an igniter side burst pressure without gas filling in the compressed gas tank 11 by comparing the prior art and the invention. The term "without gas filling in the compressed gas reservoir" means that in this case a condition is considered in which the hybrid inflator is not (yet) filled with compressed gas, as mentioned, as illustrated on Figure la for example. Therefore, in the inactive mode of both sides of the rupture cap 20, i.e. the compressed gas reservoir side and the igniter side, identical pressure levels predominate, such as atmospheric ambient pressure. In other words, here we consider only the burst pressure of the igniter side which is simply required, isolated in itself, to open and respectively destroy the rupture cap 20. As a test bench for determining the pressure As shown in FIG. 5, a burner on the igniter side shown in FIG. 5 can be constructed, for example, as shown in FIG. 1a, namely having a wall of a compressed gas reservoir 11 which is open or "cut" towards the top. To measure the igniter side burst pressure, the igniter is then ignited and the pressure formed in this manner in the igniter chamber 23 is measured as the igniter side burst pressure required to open and respectively destroy the break cap. In this way, on the one hand, a rupture cap known from the prior art as well as from the document W01 / 13484 A2 already mentioned, cf. FIG. 8 can be used in a test bench mentioned above to determine the curve "of the prior art: bursting pressure PBL" shown in FIG. 5. On the other hand, the cap According to the invention, as shown in FIG. 1, the invention can also be used to obtain the curve of the invention: bursting pressure. PBL "35 shown in FIG.
    [0011] The acronym "PBL" in this case is used for "no burst pressure" which equates to the term described above "without gas filling in the compressed gas tank".
    [0012] Detailed description of the diagram in FIG. 5: As it is clear, these two bursting pressure characteristics "prior art: bursting pressure PBL" and "invention: bursting pressure PBL" are very far apart from one another. other, that is to say that for a rupture cap of the prior art, a significantly higher bursting pressure, for example 900 bar at -40 ° C and 860 bar at + 90 ° C must be applied by the igniter, only for the rupture cap 20 according to the invention for which just 400 bars at -40 ° C and 250 bars at + 90 ° C are required to open the rupture cap 20. In this way, it clearly shows a significant advantage of the invention, that is to say a considerable reduction of bursting pressure on the igniter side.
    [0013] This advantage can be obtained in that, with the rupture cap 20 according to the invention, the transition portion 24 from the side wall 22 to the bottom 21, is formed so that when the pressure is applied from the outside on the bottom 21, the igniter compartment side portion 40 of the bottom 21 may abut the igniter compartment side area 50 of the side wall 22. For the rest, the fact that in both burst pressure characteristics In FIG. 5, the respective burst pressure decreases slightly with increasing temperature, is due to a general softening of the material or to a general structural weakening of the respective rupture cap with increasing temperature.
    [0014] In addition to the two burst pressure characteristics described above "prior art: burst pressure PBL" and "invention: burst pressure PBL", in the diagram of FIG. 5, the two curves of "burst pressure" bursting (compressed gas tank side) "and" filling pressure PF in the compressed gas tank "already described in Figure 4, are illustrated. When comparing the two upper curves "burst pressure (compressed gas tank side)" and "prior art: burst pressure 10 PBL", we can make the following two comments: First, the two curves are located at a very short distance from each other. This is not surprising since both curves represent crush pressure characteristics for the same component, i.e., the prior art break cap, the "prior art: pressure" curve. PBL bursting ", it represents nothing more than a curve of crushing pressure. The difference simply resists in the fact that the curve "prior art: burst pressure PBL" is defined by the application of pressure on the part of the igniter, i.e. in the igniter compartment 23, while the "crushing pressure (compressed gas tank side)" curve results from the application of pressure from the compressed gas reservoir 11. Secondly, these two curves are in the application range total common temperature of a hybrid inflator (-40 ° C to + 90 ° C) above the maximum filling pressure PFmax (800 bar) which can be reached at the maximum operating temperature of the hybrid inflator (here + 90 ° C) Thus in the diagram of Figure 5, the curve "prior art: burst pressure PBL" with the mark of the. Maximum operating temperature (+ 90 ° C) with a burst pressure value of 860 bar is above the maximum filling pressure PF max of 800 bar of the compressed gas tank of about 7.5%. On the other hand, the "invention: burst pressure PBL" curve throughout the temperature application range (-40 ° C to + 90 ° C) is significantly lower than the maximum filling pressure PFmax (800 bar). ); Specifically, with the above-mentioned reference point of the maximum operating temperature (+ 90 ° C), the burst pressure PBL of the rupture cap according to the invention, in this case, is simply 250 bar. that is, less than the maximum filling pressure PFmax of about 68.75%. According to this consideration, there is also the substantial advantage of the invention already mentioned above, namely a considerable reduction of bursting pressure on the igniter side by the rupture cap 20 according to the invention. Part of the consideration described above can also be formulated as follows, using a representation of formula: The following is applicable to a prior art break cap: PBL> PFmax. On the other hand, the following is applicable to a break cap according to the invention: PBL <PFmax in which PBL is defined in each case as the bursting pressure on the igniter side of the burst cap only with the counterpart atmospheric pressure opposite the igniter chamber, i.e. without any gas filling pressure in the compressed gas tank. PFmax is defined as the maximum fill pressure that results at the maximum operating temperature of the hybrid inflator in idle mode. FIG. 6 illustrates a diagram including curves for igniter side burst pressure with compressed gas gas filled gas tank 11 comparing the prior art and the invention. In contrast to FIG. 5 described above, in this case, the hybrid inflator is now filled with compressed gas as intended, as illustrated for example in FIG. 1b, that is, mounted to be ready to work. A corresponding characteristic for the filling pressure PF in the compressed gas reservoir 11, as already shown in FIGS. 4 and 5, has been adopted for FIG.
    [0015] In FIG. 6, two curves "prior art: PBL + PF" and "invention: PBL + PF" are also represented. These two curves result, as already indicated by their formula designation, from the addition of the igniter side burst pressure curve without any gas filling pressure in the compressed gas tank (see FIG. curve of the corresponding filling pressure PF in the compressed gas tank. In other words, the two previous curves of FIG. 6 are developed from the two curves described in FIG. 5 "prior art: burst pressure PBL" and "invention: burst pressure PBL" by raising each of these two curves of Figure 5 with the level of the curve "filling pressure PF"; i.e., the respectively predominant pressure value of the filling pressure PF in the compressed gas reservoir is added in each case to the pressure values of these two curves in FIG. bursting pressure on the igniter side comes from a rupture cap of the prior art (curve "prior art: PBL + PF") and the rupture cap according to the invention (curve "invention: PBL + PF") given that the filling pressure PF is opposed to the bursting pressure on the igniter side. As already described at the beginning, the igniter must not only accumulate the pressure required to destroy the rupture cap, considered isolated in itself, but must also "counteract" the predominant filling pressure in the compressed gas reservoir, ie that is to say overcome such a back pressure, to cause the destruction of the rupture cap, when mounted on such a hybrid inflator. A possible test bench can be made with regard to FIG. 6 for measuring the pressure of the two curves "prior art: PBL + PF" and "invention: PBL + PF" with a device as illustrated, for example, in FIG. 1b. in this case with a wall of the compressed air tank 11 closed on the top, automatically, so that the filling pressure PF appears in the compressed gas tank 11 (for example 580 bars at 23 ° C) to measure the burner pressure on the igniter side, then the igniter 14 is activated and the resulting pressure is measured in the igniter compartment 23. With such a test bench, that is to say a hybrid inflator filled with pressure to be ready for use, it must be made plausible, with respect to the burst pressure on the igniter side, the fact that the igniter 14 activated in the igniter compartment 23 must first generate a back pressure corresponding to the PF pre-filling pressure dominant in the compressed gas reservoir 11 to cause a pressure balance on both sides of the rupture cap 20. Only a proportion of pressure exceeding the level of the filling pressure PF in the igniter compartment 23 is adapted to provide the deformation and finally to open and break the rupture cap. Thus, the burst pressures at the igniter side and igniter chamber side shown in Fig. 6 ("prior art: PBL + PF" and "invention: PBL + PF") really come from the pressures that are required to open a rupture cap. in a hybrid inflator comprising a compressed gas reservoir filled with the filling pressure. In the diagram of Figure 6, in addition, a curve "PFmax + PF" is shown. It is a calculable auxiliary variable or auxiliary curve which can be deduced from the diagram of FIG. 5 and is not a really measurable pressure at the level of a component or a component space as will be explained here. -after. As already described, since the two curves "prior art: burst pressure PBL" and "invention: burst pressure PBL" of FIG. 5 increase according to the pressure level of the "filling pressure PF in the reservoir of compressed gas "characteristic to arrive at the corresponding curves in Figure 6 (" prior art: PBL + PF "and" invention: PBL + PF "), therefore also the pressure value" PFmax "of Figure 5 increases depending on the pressure level of the characteristic "filling pressure PF in the compressed gas tank", which then results in the computable auxiliary curve "PFmax + PF", ie the sum of the filling pressure maximum PFmax and filling pressure PF. FIG. 6 clearly shows that, in the prior art break cap, the burst chamber side burst pressure necessary to destroy the burst cap ("prior art: PBL + PF" curve) is superior to the "PFmax + PF" curve over the entire temperature range (-40 ° C to + 90 ° C) of the hybrid inflator. On the other hand, in this range, the igniter compartment side burst pressure required to destroy the rupture cap 20 according to the invention ("invention: PBL + PF" curve) is significantly lower than the "PFmax" curve. + PF ". In other words, it is clear from FIG. 6 that the burst chamber side burst pressure 32 necessary to destroy the rupture cap 20 according to the invention is less than the sum of the maximum filling pressure. PFmax and filling pressure PF.
    [0016] This relation can also be formulated, analogously to the previous part, using the following representation of formula: The following is applicable to a rupture cap of the prior art: PBL + PF> PFmax + PF then that the following is applicable to a rupture cap according to the invention: PBL + PF <PFmax + PF.
    [0017] List of Part Numbers 10 Hybrid Inflator 11 Compressed Gas Tank 12 Inside Compressed Gas Tank 13 Igniter Bracket 14 Igniter 15 Trim Ring 20 Breaking Cap 21 Bottom 22 Sleeve Side Wall 23 Igniter Compartment 24 transition portion 25 outer face of bottom 26 groove-shaped recess 27 boundary zone 28 groove bottom 29 inner face of bottom 31 bead-shaped outward formation 32 bend 33 tip 34 surface side of igniter compartment 35 zone weakened 36 collar 37 inwardly shaped bead 38 outer peripheral side surface 40 part side bottom liner compartment 50 side lighter compartment side side section A longitudinal axis of the burst cap PF filling pressure in the compressed gas tank PFmax maximum filling pressure in the compressed gas tank PBL without bursting pressure (without any pr gas filling pressure in the compressed gas tank)
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. A rupture cap, particularly for a hybrid inflator, comprising a bottom (21) and a sleeve-like side wall (22) defining an igniter compartment (23) within the rupture cap (20), the rupture cap (20) being adapted to be pressurized with compressed gas in idle mode, on its outside, and in case of operation, the rupture cap (20) being adapted to be destroyed by a bursting pressure on the side ignition compartment, characterized in that: a transition portion (24) is formed from the side wall (22) at the bottom (21) so that, when external pressure of the bottom (21) is applied, a the igniter compartment side (40) of the bottom (21) can be supported on an igniter compartment side area (50) of the side wall (22).
    [0002]
    2. The rupture cap according to claim 1, characterized in that it is formed integrally, in particular by transformation, preferably by deep drawing and / or bending and / or extrusion and / or stamping.
    [0003]
    Breaking cap according to claim 1 or 2, characterized in that: the bottom (21) or the side wall (22) comprises, at least in parts, a groove-shaped recess (26) having a bottom of groove (28), the recess (26) being preferably provided on the outer peripheral side or substantially parallel to a longitudinal axis (A) of the rupture cap (20).
    [0004]
    Breaking cap according to one of claims 1 to 3, characterized in that: in the transition part (24), at least in parts, a sidewall igniter compartment surface (34) of the side wall (22) has a curved shape, in particular a convex shape, preferably so that between the igniter compartment side portion (40) of the bottom (21) and the side igniter compartment side (50) of the side wall (22), a fold (32) comprising a tip (33) is formed.
    [0005]
    Breaking cap according to claim 4, characterized in that: from the tip (33) a weakened area (35) is formed for an outer peripheral lateral surface portion closest to the rupture cap. (20).
    [0006]
    Breaking cap according to claim 5, characterized in that: the nearest outer peripheral side surface portion constitutes an outer peripheral side surface (38) of the side wall (22) and / or the groove base ( 28). 15
    [0007]
    Hybrid inflator (10) comprising a rupture cap (20) according to any one of claims 1 to 6.
    [0008]
    The hybrid inflator of claim 7, characterized in that: the wall thickness of the rupture cap (22) in the transition portion (24) is smaller than in the igniter compartment side portion (40). the bottom (21) and / or the igniter compartment side area (50) of the side wall (22). 25
    [0009]
    Hybrid inflator (10), in particular according to claim 7 or 8, comprising a rupture cap (20) comprising a bottom (21) and a sleeve-shaped side wall (22), the bottom (21) and the side wall (22) defining an igniter compartment (23), in which, in the inactive mode, the rupture cap (20) is pressurized on the outer peripheral side with compressed gas having a filling pressure (PF) which, at a maximum functional temperature of the hybrid inflator (10), has a maximum filling pressure (PFmax), and in. Wherein the rupture cap (20) can be destroyed during operation by bursting pressure on the igniter compartment side, characterized by: forming a transition portion (24) from the cap sidewall (22) of rupture (20) to the bottom (21) so that the igniter compartment side burst pressure necessary to destroy the capture cap (20) is less than the sum of the maximum fill pressure (PFmax) and filling pressure (PF).
    [0010]
    10. Hybrid inflator according to claim 9, characterized in that the rupture cap (20) is formed according to any one of claims 1 to 6.
    [0011]
    Hybrid inflator according to any one of claims 7 to 10, characterized in that: the rupture cap (20) is connected, in particular welded, to an igniter support (13) so that an igniter (14) protrudes into the igniter compartment (23) of the rupture cap (20) and the rupture cap (20) projects into the interior (12) of a compressed gas reservoir (11).
    [0012]
    Hybrid inflator according to one of claims 7 to 11, characterized in that during operation the igniter chamber (23) is or may be in fluid communication with the interior (12) of the reservoir. of compressed gas (11).
    [0013]
    An airbag module comprising a rupture cap (20) and / or comprising a hybrid inflator (10) according to any one of the preceding claims.
    [0014]
    A vehicle security system comprising a rupture cap (20) and / or a hybrid inflator (10) and / or an airbag module according to any one of the preceding claims.
    [0015]
    A method of manufacturing a rupture cap (20) according to any one of claims 1 to 6, characterized in that: a rupture cap blank is provided in a method of deformation under pressure and / or shaping and / or shrinking, in particular by transformation, preferably by deep drawing and / or bending and / or extrusion and / or stamping, with a fold (32) and / or between the igniter compartment side portion (40) of the bottom (21) and the igniter compartment side area (50) of the side wall (22) with a fold (32) comprising a tip (33).
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    同族专利:
    公开号 | 公开日
    FR3023761B1|2019-05-31|
    JP2016022946A|2016-02-08|
    CN105270317B|2019-07-05|
    CN105270317A|2016-01-27|
    JP6661287B2|2020-03-11|
    DE102014010617A1|2016-01-21|
    US20160016531A1|2016-01-21|
    US9821752B2|2017-11-21|
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    法律状态:
    2016-07-26| PLFP| Fee payment|Year of fee payment: 2 |
    2017-07-26| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-29| PLSC| Search report ready|Effective date: 20180629 |
    2018-07-26| PLFP| Fee payment|Year of fee payment: 4 |
    2019-07-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-27| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-26| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014010617.9A|DE102014010617A1|2014-07-21|2014-07-21|Hybrid gas generator with a bursting cap, bursting cap, gas bag module, vehicle safety system and method for producing a bursting cap|
    DE102014010617.9|2014-07-21|
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