WO1997020712A1 - System for filling a restraint device - Google Patents
System for filling a restraint device Download PDFInfo
- Publication number
- WO1997020712A1 WO1997020712A1 PCT/EP1996/005431 EP9605431W WO9720712A1 WO 1997020712 A1 WO1997020712 A1 WO 1997020712A1 EP 9605431 W EP9605431 W EP 9605431W WO 9720712 A1 WO9720712 A1 WO 9720712A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- membrane
- module
- combustion chamber
- pressure vessel
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
- B60R21/272—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators
Definitions
- the invention relates to a device for filling a restraining device, in particular an impact cushion (airbag) for protection for the occupants of a motor vehicle, according to the preamble of claim 1
- Hyb ⁇ d-Casgenerator is known for example from the patent DE 44 05 997 ci
- the hybrid gas generator described therein has the disadvantages that, on the one hand, only insufficient mixing takes place between the cold gas stored in the high-pressure container and the pyrotechnically generated hot gas in the mixing chamber, so that due to the only slightly cooled hot gas, a strong thermal Loading of parts of the gas generator and the impact cushion takes place. On the one hand, this results in an increased risk of injury for vehicle occupants and, on the other hand, there are larger, thicker walls of the affected parts and thus additional material and weight required
- the gas generator has an unreproducible opening behavior of the membrane, so that the point in time at which cold gas emerges from the high-pressure container is associated with a large uncertainty factor.
- the fuel is dimensioned so that only the membrane is welded on and there is insufficient heating of the propellant gas at a low ambient temperature.
- a device for filling a restraint device in particular an impact cushion (airbag) for protecting the occupants of a motor vehicle, with the following features.
- a gas mixture consisting of a cold gas and a hot gas is used to fill the impact cushion;
- the cold gas is stored in a pressure vessel;
- the pressure vessel has an outlet opening which is closed with a membrane, the hot gas is generated pyrotechnically in a module, the module has a combustion chamber with outlet openings which are directed towards the membrane, the outlet openings are directed towards the membrane;
- the pyrotechnically generated hot gas first welds through the membrane and then heats the emerging cold gas, the pressure vessel being arranged in a toroidal shape around the module
- the hybrid gas generator has a modular structure, so that the individual modules can be prefabricated, tested and easily and inexpensively connected to one another during final assembly.
- tige very pure and tempered propellant gas, so that no complex and expensive filter media for cleaning and cooling of the propellant gas generated must be used
- the figure shows a hybrid gas generator 1, the circular and mostly made of aluminum, an aluminum alloy or sheet steel
- IO home is composed of an upper housing part 2 and a lower housing part 3 for fastening an impact cushion 4 as part of an occupant protection system and for fastening the hybrid gas generator 1 to structural elements of a motor vehicle, for example the steering wheel, which is used with the housing lower part 3 one-piece flange 5 in the center is in one
- igniter 6 arranged an ignition unit 11 consisting of electrical igniter 7, primary charge 8, intensifying charge 9 and early charge 10
- a toroidal combustion chamber 0 12 is arranged concentrically around the igniter unit 11 and contains a solid fuel 13, which is usually in tablet form.
- Volume compensation means in the form of full bodies 14 ensure a secure hold of the fuel tablets 13 and prevent noise caused by rattling during driving operation In a draw, hot gas jets flow from the ignition unit 11 through nozzle holes 5 into the combustion chamber 12 and ignite the fuel tablets there
- the propellant gas which arises when the fuel tablets 13 burn off leaves the combustion chamber 12 through discharge openings in the form of nozzles 16 and flows into a mixing zone 17 em in order to protect the mostly moisture-sensitive fuel tablets 13 from the ingress of moisture, the 0 nozzles 16 by means of a dam 18 sealed in the form of a dense film, for example an aluminum film
- a pressure vessel 19 with filling device 20 for storing an inert gas, a gas mixture or a liquid gas is arranged around the combustion chamber 12 and between the upper housing part 2 and the lower housing part 3, the outlet opening 26 of which is closed by a membrane 21
- the membrane 21 is towards the mixing zone 17 and opposite the du- sen 16 of the combustion chamber 12 arranged such that it is welded when the hybrid gas generator 1 is triggered by the hot gas jets formed when the fuel tablets 13 are burnt off.
- the opening behavior when welding through can be achieved by suitable curvature or 5 notching of the membrane 21 and by the distance between the membrane
- the diameter of the nozzles 16 must be dimensioned according to how much hot gas has to flow through them in order to achieve a burning through of the membrane 21 in the shortest tent, so that cold gas can escape from the pressure vessel 19.
- the pyrotechnically generated hot gas also has the task of heating the cold gas flowing out of the pressure vessel 19 in the mixing zone 17 so that its volume increases and the impact cushion 4 is inflated 15 to a sufficient extent.
- the mixing creates a well-tempered gas mixture, so that a high thermal load on the hybrid gas generator 1 and the baffle cushion 4 due to insufficiently mixed hot gas is avoided.
- the cold gas emerging from the pressure vessel 19 mixes with the hot gas generated in the combustion chamber 12 to form a gas mixture with a defined temperature.
- the modular structure results in a simple and inexpensive construction of the hybrid gas generator 1 housing lower part 3 with the pressure vessel 19 and the approximately rotationally symmetrical housing upper part 2 with the ignition unit 11 and the combustion chamber 12, designed as an insert and designated as a pyrotechnic module 27 preassembled and checked before all modules are connected to each other during final assembly. Since the upper housing part 2 and the lower housing part 3 must be permanently and inseparably connected to one another, a form-locking connection in the form of a thread 24, which is at least partially self-tapping, is used as the connecting means
- the fuel tablets 13 are filled into the combustion chamber 12 and these are sealed with a seal 25. Finally, the upper housing part 2 is screwed into the lower housing part 3
Abstract
The invention concerns a system for filling a restraint device, in particular an airbag (4) for protecting motor vehicle passengers, the system displaying the following features: a gas mixture comprising a cold gas and a hot gas is used to fill the airbag (4); the cold gas is stored in a pressurized container (19); the pressurized container has an outlet opening (26) closed by a diaphragm (21); the hot gas is generated pyrotechnically in a module (27); the module (27) comprises a combustion chamber (12) with outlet openings (16) directed towards the diaphragm (21); when the system is triggered, the pyrotechnically generated hot gas first melts the diaphragm (21) and then heats the emerging cold gas; and the pressurized container (19) is disposed in a toroidal manner about the module (27).
Description
00
Vorrichtung zum Befüllen einer RuckhaltevorπchtunαDevice for filling a Ruckhaltevorπchtunα
Die Erfindung betrifft eine Vorrichtung zum Befüllen einer Ruckhaltevor¬ richtung, insbesondere eines Prallkissens (Airbag) zum Schutz für die insas- 1 sen eines Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 1The invention relates to a device for filling a restraining device, in particular an impact cushion (airbag) for protection for the occupants of a motor vehicle, according to the preamble of claim 1
Ein gattungsgemaßer Hybπd-Casgenerator ist beispielsweise aus der Patent¬ schrift DE 44 05 997 ci bekanntA generic Hybπd-Casgenerator is known for example from the patent DE 44 05 997 ci
0 Für den dann beschriebenen Hybπd-Gasgenerator mit einem pyrotechni¬ schen Gasgenerator und einem Hochdruckbehalter, bei dem nach dem An¬ zünden von Treibstoff heiße Treibgase aus einer Öffnung einer Brennkam¬ mer ausströmen und gegen eine gegenüber der Öffnung angeordneten Dichtscheibe des Hochdruckbehalters blasen und nach dem Offnen der Dich- ^ tungsscheibe die Treibgase und Gas aus dem Hochdruckbehalter durch Aus- tπttsoffnungen in einen Gassack strömen, wird die Verwendung einer Re¬ zeptur für den Treibstoff mit einem Überschuß an Stoffen zum Erzeugen eines chemisch reaktiven Treibgases, welches die Dichtungsscheibe an ihrer Oberflache nicht nur thermisch, sondern auch chemisch angreift und konti- 0 nuierlich durchbrennt, vorgeschlagen, um die schließende Dichtungsscheibe ohne Auftreten eines hohen Schalldrucks zu offnenFor the hybrid gas generator then described, with a pyrotechnic gas generator and a high-pressure container, in which, after the ignition of fuel, hot propellant gases flow out of an opening in a combustion chamber and blow against a sealing disk of the high-pressure container arranged opposite the opening and blow off When the sealing washer and the propellant gases and gas flow from the high-pressure container through outlet openings into a gas bag, the use of a recipe for the propellant with an excess of substances is used to generate a chemically reactive propellant gas which the sealing washer holds on its Surface not only attacks thermally, but also chemically and burns continuously, proposed in order to open the closing sealing washer without the occurrence of high sound pressure
Der darin beschriebene Hybrid-Gasgenerator weist die Nachteile auf, daß ei¬ nerseits zwischen dem im Hochdruckbehalter gespeicherten Kaltgas und ^ dem pyrotechnisch erzeugten Heißgas im Mischungsraum nur eine ungenü¬ gende Vermischung stattfindet, so daß aufgrund des nur wenig abgekühl¬ ten Heißgases eine starke thermische Belastung von Teilen des Gasgene¬ rators und des Prallkissens stattfindet Daraus ergibt sich zum einen eine er¬ höhte Verletzungsgefahr für Fahrzeuginsassen und zum anderen sind gro- 0 ßere wandstarken der betroffenen Teile und damit zusätzliches Material
und Gewicht erforderlich Andererseits weist der Gasgenerator ein unrepro¬ duzierbares Offnungsverhalten der Membrane auf, so daß der Zeitpunkt, zu dem Kaltgas aus dem Hochdruckbehalter austritt, mit einem großen unsi- cherheitsfaktor behaftet ist. Der Treibstoff ist so bemessen, daß lediglich die Membrane aufgeschweißt wird und nur eine ungenügende Erwärmung des Treibgases bei niedriger Umgebungstemperatur erfolgt.The hybrid gas generator described therein has the disadvantages that, on the one hand, only insufficient mixing takes place between the cold gas stored in the high-pressure container and the pyrotechnically generated hot gas in the mixing chamber, so that due to the only slightly cooled hot gas, a strong thermal Loading of parts of the gas generator and the impact cushion takes place. On the one hand, this results in an increased risk of injury for vehicle occupants and, on the other hand, there are larger, thicker walls of the affected parts and thus additional material and weight required On the other hand, the gas generator has an unreproducible opening behavior of the membrane, so that the point in time at which cold gas emerges from the high-pressure container is associated with a large uncertainty factor. The fuel is dimensioned so that only the membrane is welded on and there is insufficient heating of the propellant gas at a low ambient temperature.
Es ist deshalb Aufgabe der Erfindung, einen Hybrid-Gasgenerator der ein¬ gangs genannten Art anzugeben, mit dem die vorgenannten Nachteile ver¬ mieden werdenIt is therefore an object of the invention to provide a hybrid gas generator of the type mentioned at the outset with which the aforementioned disadvantages are avoided
Gelost wird diese Aufgabe durch eine Vorrichtung zum Befüllen einer Ruck- haltevorπchtung, insbesondere eines Prallkissens (Airbag) zum Schutz für die Insassen eines Kraftfahrzeugs, mit folgenden Merkmalen.This object is achieved by a device for filling a restraint device, in particular an impact cushion (airbag) for protecting the occupants of a motor vehicle, with the following features.
zur Befullung des Prallkissens wird ein aus einem Kaltgas und einem Heißgas bestehendes Gasgemisch verwendet; das Kaltgas ist in einem Druckbehalter gespeichert; der Druckbehalter weist eine Austrittsöffnung auf, die mit ei- ner Membrane verschlossen ist, das Heißgas wird pyrotechnisch in einem Modul erzeugt, das Modul weist eine Brennkammer mit Austπttsoffnungen auf, die auf die Membrane gerichtet sind, die Austrittsoffnungen sind auf die Membrane gerichtet; - bei einer Auslosung durchschweißt das pyrotechnisch erzeug¬ te Heißgas zuerst die Membrane und erwärmt anschließend das austretende Kaltgas, wobei der Druckbehalter torusformig um das Modul angeord¬ net ista gas mixture consisting of a cold gas and a hot gas is used to fill the impact cushion; the cold gas is stored in a pressure vessel; the pressure vessel has an outlet opening which is closed with a membrane, the hot gas is generated pyrotechnically in a module, the module has a combustion chamber with outlet openings which are directed towards the membrane, the outlet openings are directed towards the membrane; - In the case of a draw, the pyrotechnically generated hot gas first welds through the membrane and then heats the emerging cold gas, the pressure vessel being arranged in a toroidal shape around the module
in den unteranspruchen sind Weiterbildungen und vorteilhafte Ausfuh¬ rungsformen der Erfindung beschrieben.Further developments and advantageous embodiments of the invention are described in the subclaims.
Die Vorteile der Erfindung liegen insbesondere darin, daß der Hybπd-gasge- nerator einen modularen Aufbau aufweist, so daß die einzelnen Module vor¬ gefertigt, geprüft und bei der Endmontage einfach und kostengünstig mit¬ einander verbunden werden können Bei der Auslosung entsteht ein ungif-
tiges, sehr reines und temperiertes Treibgas, so daß keine aufwendigen und teuren Filtermittel zur Reinigung und Kühlung des erzeugten Treibgases ver¬ wendet werden müssenThe advantages of the invention are, in particular, that the hybrid gas generator has a modular structure, so that the individual modules can be prefabricated, tested and easily and inexpensively connected to one another during final assembly. tige, very pure and tempered propellant gas, so that no complex and expensive filter media for cleaning and cooling of the propellant gas generated must be used
5 Ein Ausfuhrungsbeispiel der Erfindung ist nachstehend ausfuhrlich erläu¬ tert und anhand einer Figur dargestellt5 An exemplary embodiment of the invention is explained in detail below and illustrated with the aid of a figure
Die Figur zeigt einen Hybnd-Gasgenerator 1, dessen kreisförmiges und meist aus Aluminium, einer Aluminiumlegierung oder Stahlblech bestehendes Ge-The figure shows a hybrid gas generator 1, the circular and mostly made of aluminum, an aluminum alloy or sheet steel
I O hause sich aus einem Gehauseoberteil 2 und einem Gehauseunterteil 3 zu¬ sammensetzt zur Befestigung eines Prallkissens 4 als Teil eines Insassen¬ schutzsystems und zur Befestigung des Hybπd-Gasgenerators 1 an Struktur¬ elementen eines Kraftfahrzeugs, z.B dem Lenkrad, dient ein mit dem Ge hauseunterteil 3 einstuckig ausgebildeter Flansch 5 im Zentrum ist in einerIO home is composed of an upper housing part 2 and a lower housing part 3 for fastening an impact cushion 4 as part of an occupant protection system and for fastening the hybrid gas generator 1 to structural elements of a motor vehicle, for example the steering wheel, which is used with the housing lower part 3 one-piece flange 5 in the center is in one
15 Anzunderhulse 6 eine aus elektrischem Anzünder 7, Pπmarladung 8, ver- starkerladung 9 und Fruhzundladung 10 bestehende Anzundemheit 11 an¬ geordnet15 igniter 6 arranged an ignition unit 11 consisting of electrical igniter 7, primary charge 8, intensifying charge 9 and early charge 10
Konzentrisch um die Anzundemheit 11 ist eine torusformige Brennkammer 0 12 angeordnet die einen meist in Tablettenform vorliegenden Festtreib¬ stoff 13 enthalt Volumenausgleichsmittel in Form von Fullkorpern 14 sor¬ gen für einen sicheren Halt der Treibstofftabletten 13 und verhindern Ge¬ räusche durch Klappern wahrend des Fahrbetriebes Bei einer Auslosung strömen heiße Gasstrahlen aus der Anzundemheit 11 durch Dusenbohrun- 5 gen 15 in die Brennkammer 12 und entzünden dort die TreibstofftablettenA toroidal combustion chamber 0 12 is arranged concentrically around the igniter unit 11 and contains a solid fuel 13, which is usually in tablet form. Volume compensation means in the form of full bodies 14 ensure a secure hold of the fuel tablets 13 and prevent noise caused by rattling during driving operation In a draw, hot gas jets flow from the ignition unit 11 through nozzle holes 5 into the combustion chamber 12 and ignite the fuel tablets there
13 Das beim Abbrand der Treibstofftabletten 13 entstehende Treibgas ver¬ laßt durch Austnttsoffnungen in Form von Düsen 16 die Brennkammer 12 und strömt in eine Mischzone 17 em um die meist feuchteempfindlichen Treibstofftabletten 13 vor eindringender Feuchtigkeit zu schützen, sind die 0 Düsen 16 mittels einer Verdammung 18 in Form einer dichten Folie, z B ei¬ ner Aluminiumfolie, abgedichtet13 The propellant gas which arises when the fuel tablets 13 burn off leaves the combustion chamber 12 through discharge openings in the form of nozzles 16 and flows into a mixing zone 17 em in order to protect the mostly moisture-sensitive fuel tablets 13 from the ingress of moisture, the 0 nozzles 16 by means of a dam 18 sealed in the form of a dense film, for example an aluminum film
um die Brennkammer 12 herum und zwischen Gehauseoberteil 2 und Ge- hauseunterteil 3 ist ein Druckbehalter 19 mit Befullvorπchung 20 zur spei- ι5 cherung eines inerten Gases, eines Gasgemisches oder eines Flüssiggases an¬ geordnet, dessen Austrittsöffnung 26 mittels einer Membrane 21 verschlos¬ sen ist Die Membrane 21 ist zur Mischzone 17 hin und gegenüber den Du-
sen 16 der Brennkammer 12 derart angeordnet, daß sie bei einer Auslösung des Hybrid-Gasgenerators 1 durch die beim Abbrand der Treibstofftabletten 13 entstehenden, heißen Gasstrahlen aufgeschweißt wird. Das Öff¬ nungsverhalten beim Durchschweißen kann durch geeignete Wölbung oder 5 Einkerbung der Membrane 21 und durch den Abstand zwischen MembraneA pressure vessel 19 with filling device 20 for storing an inert gas, a gas mixture or a liquid gas is arranged around the combustion chamber 12 and between the upper housing part 2 and the lower housing part 3, the outlet opening 26 of which is closed by a membrane 21 The membrane 21 is towards the mixing zone 17 and opposite the du- sen 16 of the combustion chamber 12 arranged such that it is welded when the hybrid gas generator 1 is triggered by the hot gas jets formed when the fuel tablets 13 are burnt off. The opening behavior when welding through can be achieved by suitable curvature or 5 notching of the membrane 21 and by the distance between the membrane
21 und den Düsen 16, der durch einen Abstandshalter 22 hergestellt wird, bestimmt werden. Der Durchmesser der Düsen 16 muß danach bemessen werden, wieviel Heißgas durch sie hindurchströmen muß, um in kürzester Zelt ein Durchbrennen der Membrane 21 zu erreichen, so daß Kaltgas aus I O dem Druckbehälter 19 austreten kann.21 and the nozzles 16, which is produced by a spacer 22, can be determined. The diameter of the nozzles 16 must be dimensioned according to how much hot gas has to flow through them in order to achieve a burning through of the membrane 21 in the shortest tent, so that cold gas can escape from the pressure vessel 19.
Das pyrotechnisch erzeugte Heißgas hat zudem die Aufgabe, das aus dem Druckbehälter 19 ausströmende Kaltgas in der Mischzone 17 zu erwärmen, damit dessen Volumen zunimmt und das Prallkissen 4 in genügendem Maße 15 aufgeblasen wird. Durch die Vermischung entsteht ein gut temperiertes Gas¬ gemisch, so daß eine hohe thermische Belastung des Hybrid-Gasgenerators 1 und des Prallkissens 4 durch ungenügend vermischtes Heißgas vermieden wird.The pyrotechnically generated hot gas also has the task of heating the cold gas flowing out of the pressure vessel 19 in the mixing zone 17 so that its volume increases and the impact cushion 4 is inflated 15 to a sufficient extent. The mixing creates a well-tempered gas mixture, so that a high thermal load on the hybrid gas generator 1 and the baffle cushion 4 due to insufficiently mixed hot gas is avoided.
0 um den Hybrid-Gasgenerator 1 auszulösen, wird dem elektrischen Anzünder0 to trigger the hybrid gas generator 1, the electric lighter
7 ein hoher Zündstrom zugeführt. Dadurch schmilzt ein im Innern des elek¬ trischen Anzünders 7 angeordneter Schmelzdraht und zündet die Primärla¬ dung 8. Dies hat zur Folge, daß sich die Verstärkerladung 9 entzündet und ihre Abbrandprodukte durch die Düsenbohrungen 15 in die Brennkammer7 a high ignition current is supplied. As a result, a fuse wire arranged in the interior of the electric igniter 7 melts and ignites the primary charge 8. This has the consequence that the booster charge 9 ignites and its combustion products through the nozzle bores 15 into the combustion chamber
25 12 strömen, was zum Abbrand der Treibstofftabletten 13 führt.25 12 flow, which leads to the burning of the fuel tablets 13.
Wie weiter oben schon beschrieben, vermischt sich in der Mischzone 17 das aus dem Druckbehälter 19 austretende Kaltgas mit dem in der Brennkam¬ mer 12 erzeugten Heißgas zu einem Gasgemisch mit definierter Tempera-As already described above, in the mixing zone 17 the cold gas emerging from the pressure vessel 19 mixes with the hot gas generated in the combustion chamber 12 to form a gas mixture with a defined temperature.
30 tur, die niedrig genug ist, um das Prallkissen 4 oder Teile des Hybrid-Gasge¬ nerators 1 nicht zu beschädigen. Da der weitaus größte Anteil aus dem sehr reinen Kaltgas besteht, entsteht in der Mischzone 17 ein kühles und sau¬ beres Gasgemisch, das durch eine rings umlaufende Abströmöffnung 23 den Hybrid-Gasgenerator 1 verläßt und in das Prallkissen 4 einströmt. Ein30 door, which is low enough not to damage the impact cushion 4 or parts of the hybrid gas generator 1. By far the largest proportion consists of the very pure cold gas, is generated in the mixing zone 17, a cool and sow ¬ beres gas mixture leaving through a ring surrounding the discharge opening 23 of the hybrid gas generator 1 and flows into the air bags. 4 On
35 aufwendiges mehrstufiges Filtersystem zum Kühlen und Reinigen des Gas¬ stroms ist nicht notwendig.
Durch den modularen Aufbau ergibt sich eine einfache und kostengünstige Bauweise des Hybrid-Gasgenerators 1 Gehauseunterteil 3 mit dem Druckbe¬ halter 19 und das als Einsatz konzipierte und als pyrotechnisches Modul 27 bezeichnete, annähernd rotationssymmetπsche Gehauseoberteil 2 mit An- zundemheit 11 und Brennkammer 12 können getrennt vormontiert und überprüft werden, bevor bei der Endmontage alle Baugruppen miteinander verbunden werden. Da Gehauseoberteil 2 und Gehauseunterteil 3 dauerhaft und untrennbar miteinander verbunden sein müssen, dient als Verbin¬ dungsmittel beispielsweise eine formschlussige Verbindung in Form eines Gewindes 24, das wenigstens teilweise selbstschneidend ausgeführt ist35-consuming multi-stage filter system for cooling and cleaning the gas stream ¬ is not necessary. The modular structure results in a simple and inexpensive construction of the hybrid gas generator 1 housing lower part 3 with the pressure vessel 19 and the approximately rotationally symmetrical housing upper part 2 with the ignition unit 11 and the combustion chamber 12, designed as an insert and designated as a pyrotechnic module 27 preassembled and checked before all modules are connected to each other during final assembly. Since the upper housing part 2 and the lower housing part 3 must be permanently and inseparably connected to one another, a form-locking connection in the form of a thread 24, which is at least partially self-tapping, is used as the connecting means
Bevor der Hybrid-Gasgenerator 1 fertig montiert wird, werden die Treib¬ stofftabletten 13 in die Brennkammer 12 eingefüllt und diese mit einer Dichtung 25 verschlossen Abschließend wird das Gehauseoberteil 2 in das Gehauseunterteil 3 eingeschraubt
Before the hybrid gas generator 1 is fully assembled, the fuel tablets 13 are filled into the combustion chamber 12 and these are sealed with a seal 25. Finally, the upper housing part 2 is screwed into the lower housing part 3
Claims
1. Vorrichtung zum Befüllen eines Prallkissens (4) als Teil einer Rückhaltevor¬ richtung, insbesondere zum Schutz für die Insassen eines Kraftfahrzeugs, I O wobei1. Device for filling an impact cushion (4) as part of a restraint device, in particular for protection for the occupants of a motor vehicle, I O wherein
a) zur Befüllung des Prallkissens (4) ein aus einem Kaltgas und ei¬ nem Heißgas bestehendes Gasgemisch verwendet wird;a ) a gas mixture consisting of a cold gas and a hot gas is used to fill the impact cushion (4);
15 b) das Kaltgas in einem Druckbehälter (19) gespeichert ist;15 b ) the cold gas is stored in a pressure vessel (19);
c) der Druckbehälter (19) eine Austrittsöffnung (26) aufweist, die mit einer Membrane (21) verschlossen ist;c) the pressure vessel (19) has an outlet opening (26) which is closed with a membrane (21);
0 d) das Heißgas pyrotechnisch in einem Modul (27) erzeugt wird;0 d) the hot gas is generated pyrotechnically in a module (27);
r das Modul (27) eine Brennkammer (12) mit Austrittsöffnungen (16) aufweist, die auf die Membrane (21) gerichtet sind;r the module (27) has a combustion chamber (12) with outlet openings (16) which are directed towards the membrane (21);
5 f) die Austrittsöffnungen (16) auf die Membrane (21) gerichtet sind;5 f) the outlet openings (16) are directed towards the membrane (21);
g) bei einer Auslösung das pyrotechnisch erzeugte Heißgas zuerst die Membrane (21) durchschweißt und anschließend das aus- 30 tretende Kaltgas erwärmt;g) when triggered, the pyrotechnically generated hot gas first welds through the membrane (21) and then heats the emerging cold gas;
dadurch gekennzeichnet, daß der Druckbehälter (19) torusformig um das Modul (27) angeordnet ist.characterized in that the pressure vessel ( 19 ) is arranged in a toroidal shape around the module (27).
J 35 2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die Aus¬ trittsöffnungen (16) am äußeren Rand des Moduls (27) angeordnet sind und auf die auf der Innenseite des Druckbehälters (19) angeordnete Membrane (21) gerichtet sind. J 35 2. Device according to claim 1, characterized in that the outlet openings (16) are arranged on the outer edge of the module (27) and are directed towards the membrane (21) arranged on the inside of the pressure vessel (19).
3 Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Modul (27) eine annähernd rotationssymmetrische Form aufweist, daß sich im Zentrum des Moduls (27) eine Anzundeinheit (11) mit elektrischem An¬ zünder (7), Pπmarladung (8), Verstärkerladung (9) und Frύhzundladung (10) 5 befindet, daß die Brennkammer (12) torusformig um die Anzundeinheit (11) herum angeordnet ist und daß zwischen Anzundeinheit (11) und Brennkam¬ mer (12) Dusenbohrungen (15) angeordnet sind.3 Device according to claim 1 or 2, characterized in that the module (27) has an approximately rotationally symmetrical shape, that in the center of the module (27) there is a lighting unit (11) with an electric igniter (7), Pπmar charge (8) Booster charge (9) and early charge (10) 5 that the combustion chamber (12) is arranged in a toroidal shape around the ignition unit (11) and that nozzle holes (15) are arranged between the ignition unit (11) and the combustion chamber (12).
4. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch ge- I O kennzeichnet, daß das Offnungsverhalten der Membrane (21) beim Durch¬ schweißen durch geeignete Wölbung oder Einkerbung und durch den Ab¬ stand zwischen Membrane (21) und den Düsen (16) bestimmt wird.4. Device according to one of the preceding claims, characterized GE indicates that the opening behavior of the membrane (21) when welding through determined by suitable curvature or notch and by the distance between the membrane (21) and the nozzles (16) becomes.
5 Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Ab¬ is stand zwischen Membrane (21) und Düsen (16) durch einen Abstandshalter5 Device according to claim 4, characterized in that the Ab¬ is between the membrane (21) and nozzles (16) by a spacer
(22) bestimmt wird(22) is determined
6 Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Kaltgas in Form eines inerten Gases, eines Gasgemisches oder eines Flüssiggases im 0 Druckbehalter (19) gespeichert ist.6 Apparatus according to claim 1, characterized in that the cold gas is stored in the form of an inert gas, a gas mixture or a liquid gas in the 0 pressure container (19).
7 Vorrichtung nach einem der vorangehenden Ansprüche, dadurch ge¬ kennzeichnet, daß in der Brennkammer (12) vor den Abstromoffungen (16) eine Verdammung (18) angeordnet ist 57 Device according to one of the preceding claims, characterized ge indicates that a dam (18) is arranged in the combustion chamber (12) before the outflow openings (16) 5
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß es sich bei der Verdammung (18) um eine Aluminium-Dichtfolie handelt.8. The device according to claim 7, characterized in that the dam (18) is an aluminum sealing film.
9. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch ge- 30 kennzeichnet, daß in der Brennkammer (12) Fullkorper (14) als Volumenaus¬ gleichsmittel angeordnet sind9. Device according to one of the preceding claims, characterized GE 30 characterized in that in the combustion chamber (12) full body (14) are arranged as a volume compensation means
10 Vorrichtung nach einem der vorangehenden Ansprüche, dadurch ge¬ kennzeichnet, daß es sich bei dem in der Brennkammer (12) angeordneten 35 Brennstoff (13) um einen tablettenformigen oder ringförmigen Festtreib¬ stoff handelt 10 Device according to one of the preceding claims, characterized ge indicates that it is in the combustion chamber (12) arranged 35 fuel (13) is a tablet-shaped or annular solid propellant
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19545494.4 | 1995-12-06 | ||
| DE1995145494 DE19545494A1 (en) | 1995-12-06 | 1995-12-06 | Device for filling a restraint device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997020712A1 true WO1997020712A1 (en) | 1997-06-12 |
Family
ID=7779337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1996/005431 WO1997020712A1 (en) | 1995-12-06 | 1996-12-05 | System for filling a restraint device |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19545494A1 (en) |
| WO (1) | WO1997020712A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851027A (en) * | 1996-09-09 | 1998-12-22 | Bendix-Atlantic Inflator Company | Variable output driver side hybrid inflator |
| DE19726276A1 (en) * | 1997-06-20 | 1998-12-24 | Temic Bayern Chem Airbag Gmbh | Gas generator with device for producing fluid film |
| DE20114664U1 (en) | 2001-09-05 | 2002-01-17 | Trw Airbag Sys Gmbh & Co Kg | Hybrid gas generator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2243843A1 (en) * | 1973-09-14 | 1975-04-11 | Eaton Corp | Hybrid gas generator for steering wheel mounted airbag - has flat cylindrical housing with central pyrolytic charge and mixing chamber for purifying system |
| DE4405997C1 (en) * | 1994-02-24 | 1995-03-30 | Temic Bayern Chem Airbag Gmbh | Hybrid gas generator for filling an air bag |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3450414A (en) * | 1965-11-06 | 1969-06-17 | Gic Kk | Safety device for vehicle passengers |
| US3567245A (en) * | 1968-05-17 | 1971-03-02 | Eaton Yale & Towne | Vehicle safety apparatus |
| US3901530A (en) * | 1973-08-08 | 1975-08-26 | Allied Chem | Multiple mini hybrid with direct bag connection |
| US5199740A (en) * | 1991-06-10 | 1993-04-06 | Bendix Atlantic Inflator Co. | Hybrid inflator for air bag |
| DE4135299C2 (en) * | 1991-10-25 | 1998-12-24 | Temic Bayern Chem Airbag Gmbh | Gas generator |
| DE4208844C2 (en) * | 1992-03-19 | 1999-12-02 | Trw Airbag Sys Gmbh & Co Kg | Gas generator system |
| DE4312646C2 (en) * | 1993-04-19 | 1997-06-05 | Hs Tech & Design | Device for inflating an airbag |
| US5423570A (en) * | 1994-05-09 | 1995-06-13 | Morton International, Inc. | Hybrid inflator with tortuous delivery passage |
-
1995
- 1995-12-06 DE DE1995145494 patent/DE19545494A1/en not_active Withdrawn
-
1996
- 1996-12-05 WO PCT/EP1996/005431 patent/WO1997020712A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2243843A1 (en) * | 1973-09-14 | 1975-04-11 | Eaton Corp | Hybrid gas generator for steering wheel mounted airbag - has flat cylindrical housing with central pyrolytic charge and mixing chamber for purifying system |
| DE4405997C1 (en) * | 1994-02-24 | 1995-03-30 | Temic Bayern Chem Airbag Gmbh | Hybrid gas generator for filling an air bag |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19545494A1 (en) | 1997-06-12 |
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