DE19631316A1 - Hybrid gas generator - Google Patents

Hybrid gas generator

Info

Publication number
DE19631316A1
DE19631316A1 DE1996131316 DE19631316A DE19631316A1 DE 19631316 A1 DE19631316 A1 DE 19631316A1 DE 1996131316 DE1996131316 DE 1996131316 DE 19631316 A DE19631316 A DE 19631316A DE 19631316 A1 DE19631316 A1 DE 19631316A1
Authority
DE
Germany
Prior art keywords
gas
container
storage chamber
gas generator
hybrid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE1996131316
Other languages
German (de)
Other versions
DE19631316B4 (en
Inventor
Lothar Anacker
Karl Dipl Ing Bayer
Eduard Berenz
Uwe Dipl Ing Brede
Anton Bretfeld
Josef Dipl Ing Kraft
Gerrit Scheiderer
Waldemar Dr Weuter
Jiang Dr Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to DE1996131316 priority Critical patent/DE19631316B4/en
Publication of DE19631316A1 publication Critical patent/DE19631316A1/en
Application granted granted Critical
Publication of DE19631316B4 publication Critical patent/DE19631316B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
    • C06D5/08—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more liquids
    • 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
    • B60R2021/2725—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 using a fluid fuel gas generator

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

A hybrid gas generator comprises an ignition element (23), an ignitable gas producing charge, and a storage chamber (13) for a pressurised gas. The gas producing charge consists of a reactive liq. gas. The liq. gas (11) is pref. held in a container with a closure element (12).

Description

Die Erfindung betrifft einen Hybrid-Gasgenerator, der eine anzündbare gaserzeugende Ladung sowie eine ein Druckgas enthaltende Speicherkammer enthältThe invention relates to a hybrid gas generator, the an ignitable gas generating charge as well as a Contains compressed gas containing storage chamber

Aus EP 0 616 578 B1 und EP 0 669 231 A2 sind jeweils Hybrid-Gasgeneratoren bekannt, die in einer Brennkammer eine gaserzeugende Feststoffladung enthalten und ferner in einer Speicherkammer ein Druckgas enthalten. Durch elektrische Auslösung eines Anzündelements wird die Feststoffladung angezündet. Durch die entstehenden Brenngase wird ein hohler Kolben angetrieben, der ein die Speicherkammer verschließendes Schließelement durchstößt, wodurch das in der Speicherkammer enthalte­ ne unter Druck stehende Gas ausströmen kann. Die heißen Brenngase und das aus der Speicherkammer kommende kalte Druckgas werden im Gasgenerator gemischt und von diesem an einen Airbag abgegeben. Insbesondere die Brenngase enthalten Schadgase sowie feste Verbrennungsrückstände.From EP 0 616 578 B1 and EP 0 669 231 A2 are each Hybrid gas generators known in a combustion chamber contain a gas-generating solid charge and further contain a compressed gas in a storage chamber. By electrical triggering of an ignition element Solid charge ignited. By the arising A hollow piston is driven by fuel gases, which is a closing element closing the storage chamber pierces, which contains that in the storage chamber ne can escape under pressure gas. They are called Fuel gases and the cold coming from the storage chamber Compressed gas is mixed in and by the gas generator delivered to an airbag. In particular the fuel gases contain harmful gases and solid combustion residues.

Der Erfindung liegt die Aufgabe zugrunde, einen Hybrid- Gasgenerator zu schaffen, bei dem der Anteil von Schad­ gasen verringert ist und keine festen Verbrennungsrück­ stände entstehen.The invention has for its object a hybrid To create gas generator in which the proportion of harmful gas is reduced and no solid combustion back stands arise.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im Patentanspruch 1 angegebenen Merkmalen.This object is achieved with the invention the features specified in claim 1.

Bei dem erfindungsgemäßen Hybrid-Gasgenerator wird an­ stelle einer Feststoffladung ein reaktives Flüssiggas benutzt, das nach pyrotechnischer Anzündung unter Druckerzeugung verbrennt. Durch das Flüssiggas kann sichergestellt werden, daß nur geringe Schadgase ent­ stehen, und daß keine festen Verbrennungsrückstände anfallen. Das entstehende Gasgemisch ist somit relativ rein.In the hybrid gas generator according to the invention replace a solid load with a reactive liquid gas used after pyrotechnic ignition Pressure generation burns. The liquid gas can be ensured that only small harmful gases ent stand, and that no solid combustion residues attack. The resulting gas mixture is therefore relative purely.

Gemäß einer bevorzugten Weiterbildung der Erfindung ist das Flüssiggas in einem durch ein zerstörbares Schließ­ element verschlossenen Behälter enthalten. Das Schließ­ element wird durch ein von dem Anzündelement angetrie­ benes Masseteil geöffnet und anschließend wird das Flüssiggas von der Flamme des Anzündelements angezün­ det. Das Anzündelement bewirkt sowohl den Antrieb des Masseteils als auch das thermische Anzünden des Flüs­ siggases.According to a preferred development of the invention the liquefied petroleum gas in a destructible lock contain closed container. The closing element is driven by a from the igniter open mass part and then that Ignite liquefied gas from the flame of the igniter det. The igniter causes both the drive of the Mass part as well as the thermal ignition of the river siggases.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist der das Flüssiggas enthaltende Behälter in der durch ein weiteres Schließelement verschlossenen Spei­ cherkammer angeordnet und die Schließelemente von Spei­ cherkammer und Behälter sind in Bewegungsrichtung des Masseteils hintereinander angeordnet, so daß sie von demselben Masseteil nacheinander geöffnet werden.According to a preferred embodiment of the invention is the container containing the liquid gas in the Spei closed by a further closing element Arranged chamber and the closing elements from Spei Chamber and container are in the direction of movement of the  Mass part arranged one behind the other so that they from the same mass part can be opened one after the other.

Im folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.The following is with reference to the drawings an embodiment of the invention explained in more detail.

Es zeigen:Show it:

Fig. 1 einen Längsschnitt durch den Gasgenerator im Bereitschaftszustand und Fig. 1 shows a longitudinal section through the gas generator in the standby state and

Fig. 2 einen Längsschnitt durch den Gasgenerator nach dem Öffnen der Schließelemente. Fig. 2 shows a longitudinal section through the gas generator after opening the closing elements.

Der Gasgenerator enthält einen rohrförmigen Behälter 10, der mit einem Flüssiggas 11 gefüllt ist, das beim Verbrennen eine starke Gasentwicklung verursacht. Das stirnseitige Ende des Behälters 10 ist mit einem Schließelement 12 in Form einer Membran oder einer Berstscheibe druckdicht verschlossen. Im übrigen ist der Behälter 10 durch seine Behälterwand verschlossen.The gas generator contains a tubular container 10 which is filled with a liquefied petroleum gas 11 , which causes a strong gas evolution during combustion. The front end of the container 10 is closed in a pressure-tight manner with a closing element 12 in the form of a membrane or a rupture disk. Otherwise, the container 10 is closed by its container wall.

Der Behälter 10 ist koaxial in einer Speicherkammer 13 angeordnet, die ein unter Druck stehendes Gas enthält. Die Wand 14 der Speicherkammer 13 ist ebenfalls rohr­ förmig ausgebildet und umgibt den Behälter 10 mit ra­ dialem Abstand. In der Stirnwand 15 der Speicherkammer 13 befindet sich eine Öffnung 16, die mit einem Schließelement 17 in Form einer Membran oder Berst­ scheibe druckdicht verschlossen ist. The container 10 is arranged coaxially in a storage chamber 13 which contains a gas under pressure. The wall 14 of the storage chamber 13 is also tubular and surrounds the container 10 with ra dialem distance. In the end wall 15 of the storage chamber 13 there is an opening 16 which is closed in a pressure-tight manner with a closing element 17 in the form of a membrane or bursting disc.

Die beschriebene Anordnung ist von einem Gehäuse 18 umschlossen, daß eine ringförmige Mischkammer 19 be­ grenzt. Die Mischkammer 19 erstreckt sich über die ge­ samte Länge der Speicherkammer 13 und sie mündet am vorderen Ende in Auslässen 20, durch die das Gasgemisch austreten kann, um einem Airbag zugeführt zu werden.The arrangement described is enclosed by a housing 18 that an annular mixing chamber 19 be limited. The mixing chamber 19 extends over the entire length of the ge storage chamber 13 and it opens at the front end in outlets 20 through which the gas mixture can escape to be supplied to an airbag.

Am rückwärtigen Ende des Gehäuses 18 ist an der Stirn­ wand 21 ein axial ausgerichtetes Rohrstück 22 be­ festigt, das in das Gehäuseinnere ragt. Dieses Rohr­ stück enthält ein elektrisch aktivierbares pyrotechni­ sches Anzündelement 23, das in die Bohrung 24 des Rohr­ stücks 22 ragt. Vor dem Anzündelement 23 ist ein Masse­ teil 25 in der Bohrung 24 angeordnet, das die Bohrung 24 ausfüllt.At the rear end of the housing 18 an axially aligned pipe piece 22 is fastened to the end wall 21 , which protrudes into the interior of the housing. This tube piece contains an electrically activatable pyrotechnic igniter 23 which protrudes into the bore 24 of the tube piece 22 . Before the igniter 23 , a mass part 25 is arranged in the bore 24 , which fills the bore 24 .

Wenn das Anzündelement 23 gezündet wird, erzeugt es in der Bohrung 24 einen Gasdruck, der das Masseteil 25 nach Art eines Geschosses beschleunigt. Das Masseteil 25, das hier als Kugel ausgebildet ist, durchdringt nacheinander die beiden Schließelement 17 und 12, um schließlich in das Innere des Behälters 10 einzudrin­ gen, so wie dies in Fig. 2 dargestellt ist. Die dem Masseteil 25 folgende Flamme des Anzündelements 23 zün­ det das Flüssiggas 11, das daraufhin brennt und Brenn­ gas erzeugt. Das Brenngas mischt sich mit dem aus dem Speicherbehälter 13 austretenden Druckgas. Beide Gase strömen durch die Öffnung 16 hindurch und gelangen un­ ter Umlenkung um 180° in die Mischkammer 19, aus der sie durch die Auslässe 20 abströmen.When the ignition element 23 is ignited, it generates a gas pressure in the bore 24 , which accelerates the mass part 25 in the manner of a projectile. The mass part 25 , which is designed here as a ball, penetrates the two closing elements 17 and 12 one after the other in order to finally penetrate into the interior of the container 10 , as is shown in FIG. 2. The mass part 25 following flame of the igniter 23 ignites the liquid gas 11 , which then burns and generates combustion gas. The fuel gas mixes with the compressed gas emerging from the storage container 13 . Both gases flow through the opening 16 and reach un deflection by 180 ° in the mixing chamber 19 from which they flow out through the outlets 20 .

Claims (3)

1. Hybrid-Gasgenerator mit einem Anzündelement (23), einer anzündbaren gaserzeugenden Ladung und einer ein Druckgas enthaltenden Speicherkammer (13) dadurch gekennzeichnet, daß die gaserzeugende Ladung ein reaktives Flüs­ siggas (11) ist.1. Hybrid gas generator with an ignition element ( 23 ), an ignitable gas-generating charge and a storage chamber containing a compressed gas ( 13 ), characterized in that the gas-generating charge is a reactive liquid gas ( 11 ). 2. Hybrid-Gasgenerator nach Anspruch 1, dadurch ge­ kennzeichnet, daß das Flüssiggas (11) in einem durch ein Schließelement (12) verschlossenen Be­ hälter (10) enthalten ist, und daß das Schließele­ ment (12) durch ein von dem Anzündelement (23) angetriebenes Masseteil (25) geöffnet und das Flüssiggas (11) von der Flamme des Anzündelementes (23) gezündet wird.2. Hybrid gas generator according to claim 1, characterized in that the liquid gas ( 11 ) in a by a closing element ( 12 ) Be closed container ( 10 ) is contained, and in that the Schaltele element ( 12 ) by one of the ignition element ( 23 ) driven mass part ( 25 ) is opened and the liquid gas ( 11 ) is ignited by the flame of the ignition element ( 23 ). 3. Hybrid-Gasgenerator nach Anspruch 1 oder 2, da­ durch gekennzeichnet, daß der Behälter (10) in der durch ein weiteres Schließelement (17) geschlosse­ nen Speicherkammer (13) angeordnet ist und die Schließelemente (17, 12) von Speicherkammer (13) und Behälter (10) in Bewegungsrichtung des Masse­ teils (25) hintereinander angeordnet sind.3. Hybrid gas generator according to claim 1 or 2, characterized in that the container ( 10 ) in the closed by a further closing element ( 17 ) is closed NEN storage chamber ( 13 ) and the closing elements ( 17 , 12 ) of the storage chamber ( 13th ) and container ( 10 ) in the direction of movement of the mass part ( 25 ) are arranged one behind the other.
DE1996131316 1996-08-02 1996-08-02 Hybrid gas generator Expired - Fee Related DE19631316B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996131316 DE19631316B4 (en) 1996-08-02 1996-08-02 Hybrid gas generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996131316 DE19631316B4 (en) 1996-08-02 1996-08-02 Hybrid gas generator

Publications (2)

Publication Number Publication Date
DE19631316A1 true DE19631316A1 (en) 1998-02-05
DE19631316B4 DE19631316B4 (en) 2006-06-14

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ID=7801657

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996131316 Expired - Fee Related DE19631316B4 (en) 1996-08-02 1996-08-02 Hybrid gas generator

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DE (1) DE19631316B4 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0949126A2 (en) * 1998-04-08 1999-10-13 Takata Corporation Airbag inflator
EP0919781A3 (en) * 1997-11-25 2000-03-29 Oea, Inc. Controlling gas flow in a hybrid inflator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060973A (en) * 1990-07-23 1991-10-29 General Electric Company Liquid propellant inflator for vehicle occupant restraint apparatus
DE4135547A1 (en) * 1991-10-28 1993-04-29 Dynamit Nobel Ag GAS GENERATOR, IN PARTICULAR FOR AN INFLATABLE IMPACT CUSHION TO PROTECT A MOTOR VEHICLE INJURY FROM INJURY
EP0540013A1 (en) * 1991-10-30 1993-05-05 Dynamit Nobel Aktiengesellschaft Gas generator using liquified gas
DE4241221A1 (en) * 1992-12-08 1994-06-09 Dynamit Nobel Ag Liquid gas generator for an inflatable impact protection cushion to protect a motor vehicle occupant from injuries
US5345876A (en) * 1993-02-04 1994-09-13 Atlantic Research Corporation Hybrid inflator
GB2281228A (en) * 1993-08-26 1995-03-01 Autoliv Dev A gas generator for an air-bag
DE4419313A1 (en) * 1994-06-01 1995-12-07 Hs Tech & Design Gas generator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2555541B2 (en) * 1991-12-17 1996-11-20 ベンディックス・アトランティック・インフレーター・カンパニイ Hybrid inflator
GB2277984B (en) * 1993-05-12 1996-06-12 Autoliv Dev Improvements in or relating to a gas generator
DE4405997C1 (en) * 1994-02-24 1995-03-30 Temic Bayern Chem Airbag Gmbh Hybrid gas generator for filling an air bag
US5470104A (en) * 1994-05-31 1995-11-28 Morton International, Inc. Fluid fueled air bag inflator
US5494312A (en) * 1994-05-31 1996-02-27 Morton International, Inc. Autoignition of a fluid fueled inflator
DE4440247A1 (en) * 1994-11-11 1996-05-15 Dynamit Nobel Ag LPG generator

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060973A (en) * 1990-07-23 1991-10-29 General Electric Company Liquid propellant inflator for vehicle occupant restraint apparatus
DE4135547A1 (en) * 1991-10-28 1993-04-29 Dynamit Nobel Ag GAS GENERATOR, IN PARTICULAR FOR AN INFLATABLE IMPACT CUSHION TO PROTECT A MOTOR VEHICLE INJURY FROM INJURY
EP0540013A1 (en) * 1991-10-30 1993-05-05 Dynamit Nobel Aktiengesellschaft Gas generator using liquified gas
DE4135776C1 (en) * 1991-10-30 1993-05-06 Dynamit Nobel Ag
DE4241221A1 (en) * 1992-12-08 1994-06-09 Dynamit Nobel Ag Liquid gas generator for an inflatable impact protection cushion to protect a motor vehicle occupant from injuries
US5345876A (en) * 1993-02-04 1994-09-13 Atlantic Research Corporation Hybrid inflator
GB2281228A (en) * 1993-08-26 1995-03-01 Autoliv Dev A gas generator for an air-bag
DE4419313A1 (en) * 1994-06-01 1995-12-07 Hs Tech & Design Gas generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0919781A3 (en) * 1997-11-25 2000-03-29 Oea, Inc. Controlling gas flow in a hybrid inflator
EP0949126A2 (en) * 1998-04-08 1999-10-13 Takata Corporation Airbag inflator
EP0949126A3 (en) * 1998-04-08 2001-08-08 Takata Corporation Airbag inflator

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8364 No opposition during term of opposition
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20120301