WO1997006988A1 - Systeme pour l'ouverture de la membrane de rupture de bouteilles a gaz comprime dans des generateurs de gaz - Google Patents

Systeme pour l'ouverture de la membrane de rupture de bouteilles a gaz comprime dans des generateurs de gaz Download PDF

Info

Publication number
WO1997006988A1
WO1997006988A1 PCT/EP1996/003392 EP9603392W WO9706988A1 WO 1997006988 A1 WO1997006988 A1 WO 1997006988A1 EP 9603392 W EP9603392 W EP 9603392W WO 9706988 A1 WO9706988 A1 WO 9706988A1
Authority
WO
WIPO (PCT)
Prior art keywords
bursting membrane
explosive
gas
membrane
arrangement
Prior art date
Application number
PCT/EP1996/003392
Other languages
German (de)
English (en)
Inventor
Franz Fürst
Harald Seidel
Original Assignee
Temic Bayern-Chemie Airbag Gmbh
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 Temic Bayern-Chemie Airbag Gmbh filed Critical Temic Bayern-Chemie Airbag Gmbh
Publication of WO1997006988A1 publication Critical patent/WO1997006988A1/fr

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
    • F16K13/04—Other constructional types of cut-off apparatus; Arrangements for cutting-off with a breakable closure member
    • F16K13/06—Other constructional types of cut-off apparatus; Arrangements for cutting-off with a breakable closure member constructed to be ruptured by an explosion

Definitions

  • the invention relates to an arrangement for opening the bursting membrane of compressed gas cylinders in gas generators according to the preamble of claim 1.
  • Restraint systems which are equipped with a gas bag (airbag) which is inflated by a gas generated by a gas generator.
  • the hybrid gas generator ignites and heats the gas by burning suitable pyrotechnic propellants.
  • Hybrid gas generators consist of a container filled with gas. Because this gas does not have to be generated pyrotechnically, it is called cold gas.
  • the gas container is under pressure and is therefore also called a compressed gas bottle.
  • the container is closed by a closure in the form of a bursting membrane.
  • the bursting membrane can be opened in different ways in the event of a release.
  • an igniter that projects into the combustion chamber can ignite a fuel assembly in the form of, for example, propellant disks, which generates a hot gas, which then welds the bursting membrane or damages it due to the high pressure.
  • the explosion of the propellant disks can accelerate projectiles or bolts, which then mechanically destroy the bursting membrane.
  • the cold gas escapes from the container. Hot gas and cold gas mix and escape to the outside through a discharge opening, where they are used to inflate a gas bag or are fed to another consumer.
  • Liquid gas generators are also known, the bursting membrane of which is destroyed in the manner described above
  • the object of the invention is therefore to open the bursting membrane of compressed gas cylinders in gas generators quickly and easily.
  • the advantages achieved by the invention are, in particular, that the bursting membrane is opened quickly and in a defined manner in comparison to conventional solutions, that the construction of gas generators which operate according to the compressed gas cylinder principle is simplified, and thus less expensive production can be achieved.
  • Bonded explosive cushion Figure 2a Construction of a bursting membrane according to the invention
  • Detonating wire and holder Figure 2b Construction according to the invention of a bursting membrane with
  • Detonating cushion and holder Figure 3a Structure according to the invention of a bursting membrane with explosive wire pressed into a groove
  • FIG. 3b Construction of a bursting membrane according to the invention
  • Figure 1a shows a bursting membrane 1 on which an explosive wire 2 has been arranged in a circle.
  • the connection between the bursting membrane 1 and the explosive wire 2 is produced by adhesive 15.
  • Figure 1b shows a bursting membrane 1 on which an explosive cushion 18 is attached.
  • the connection between the bursting membrane 1 and the explosive cushion 18 is produced by adhesive 15.
  • FIG. 2a shows a bursting membrane 1 on which an explosive wire 2 has been arranged in a slightly spiral.
  • the connection between the bursting membrane 1 and the explosive wire 2 is achieved by a holder 17, which fixes the explosive wire 2 to the bursting membrane 1, so that the explosive wire 2 is clamped between the holder 17 and the bursting membrane 1.
  • FIG. 2b shows a bursting membrane 1 on which an explosive cushion 18 is attached.
  • the connection between the bursting membrane 1 and the explosive cushion 18 is achieved by a holder 17 which fixes the explosive wire 2 to the bursting membrane 1, so that the sprinkling cushion 18 is clamped between the holder 17 and the bursting membrane 1.
  • FIG. 3a shows a bursting membrane 1 on which an explosive wire 2 has been arranged in a spiral. There is a groove 16 in the bursting membrane 1. The explosive wire 2 can be inserted into this groove 16 and fixed with the bursting membrane 1.
  • FIG. 3b shows a bursting membrane 1 on which an explosive cushion 18 is attached. There is a groove 16 in the bursting membrane 1. The explosive cushion 18 can be inserted into this groove 16 and fixed with the bursting membrane 1.
  • Figure 4a shows the actual structure of the explosive wire in cross section.
  • the explosive wire has a pyrotechnic core 4 inside, which ignites when heated.
  • This pyrotechnic core 4 is covered with a jacket 3, which protects the pyrotechnic core 4, gives it the desired shape and simplifies the attachment of the explosive 4 to the bursting membrane 1.
  • the heat-sensitive material of the jacket 3 can be, for example, metal or plastic. It is advantageous to choose a flexible jacket with an equally flexible pyrotechnic core, so that the explosive wire can be attached to the bursting membrane in any shape.
  • Figure 4b shows the actual structure of the explosive cushion in cross section.
  • the explosive cushion has a pyrotechnic filling 4 on the inside, which ignites when heated.
  • This pyrotechnic filling 4 is surrounded by a sheath 3, which protects the pyrotechnic filling 4, gives it the desired shape and simplifies the attachment of the explosive 4 to the bursting membrane 1.
  • the heat-sensitive material of the jacket 3 can be, for example, metal or plastic. It is advantageous to choose a flexible sleeve with an equally flexible pyrotechnic filling, so that the explosive cushion can be attached to the bursting membrane in any shape.
  • FIG. 5 shows a compressed gas bottle filled with combustible gas in a gas generator with a bursting membrane according to the invention.
  • a combustible gas 5 inside the gas container 6.
  • the gas container 6 is closed by the bursting membrane 1 and is under pressure.
  • the explosive wire 2 is attached to the bursting membrane 1. This protrudes into the ignition chamber 7, which is formed by an ignition tube 11.
  • an ignition carrier 10 on which the igniter 9 is attached, which projects into the ignition chamber 7.
  • outlet openings 12 are provided on the ignition tube 11. These outlet openings 12 are covered with a dam 8.
  • a bridge wire melts in the igniter 9, which in turn ignites one or more pyrotechnic charges in the igniter itself.
  • the high pressure which arises when the pyrotechnic charges burn off opens the igniter 9 and hot gases and particles emerge from the igniter. These hot gases and particles hit the sheath of the explosive wire 2. This melts or is broken through and its pyrotechnic soul can ignite. When this charge burns up, high pressures and temperatures are generated which, due to the arrangement of the explosive wire 2 on the bursting membrane 1, have a direct effect on its mechanical strength.
  • FIG. 6 shows a compressed gas bottle filled with inert gas in a gas generator with a bursting membrane according to the invention.
  • An inert gas 13 is located inside the gas container 6.
  • the gas container 6 is closed by the bursting membrane 1 and is under pressure.
  • the explosive wire 2 is attached to the bursting membrane 1. This protrudes into the ignition chamber 7, which is formed by an ignition tube 11. In this ignition chamber there is also one or more propellant charges 14. In the ignition tube 11 there is an ignition carrier 10 on which the igniter 9 is attached, which projects into the ignition chamber 7. Furthermore, outlet openings 12 are provided on the ignition tube 11. These outlet openings 12 are covered with a dam 8.
  • a so-called bridge wire melts in the igniter 9, which in turn ignites one or more pyrotechnic charges in the igniter itself.
  • the high pressure which arises when the pyrotechnic charges burn off opens the igniter 9 and hot gases and particles emerge from the igniter. These hot particles and particles hit the sheath of the explosive wire 2.
  • this charge burns up, high pressures and temperatures are generated which, due to the arrangement of the explosive wire 2 on the bursting membrane 1, have a direct effect on its mechanical strength.
  • the action of the high pressures and temperatures weaken the bursting membrane 1 in such a way that it can no longer withstand the pressure of the gas in the compressed gas bottle 6.
  • the bursting membrane 1 bursts and gas 13 flows from the compressed gas container 6 into the ignition chamber 7, where at the same time the propellant charge 14 was ignited with the explosive wire 2.
  • the hot gas formed when the propellant charge 14 burns up mixes with the cold gas from the compressed gas bottle 6 in the ignition chamber 7.
  • the mixed gas flows outward through the outlet openings 12 after the dam 8 of the ignition tube 11 has been opened.
  • Another variant, not shown, also results from the fact that the preferably metallic sheath 3 of the explosive wire 2 or sheath 3 of the explosive cushion 18 is connected to an electrical energy source.
  • the core 4 of the explosive wire 2 or the filling 4 of the explosive cushion 18 can also be ignited independently of the igniter 9, for example by a current flow, by heating the casing 3 or by generating sparks inside the casing 3, the explosive 4 on the bursting membrane 1 ignites.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un système permettant d'ouvrir la membrane de rupture de bouteilles à gaz comprimé dans des générateurs de gaz, notamment pour des systèmes de retenue passifs. Dans les systèmes antérieurs, la membrane de rupture était percée par des projectiles ou des boulons, endommagée sous l'effet d'une pression élevée ou ouverture par fusion par un courant gazeux chaud. Selon l'invention, une matière explosive se présentant de préférence sous forme de fil détonant (2) ou de coussin détonant (18) qui entoure la charge (4) pyrotechnique d'une enveloppe (3) est placée sur la membrane de rupture (1) et est reliée à elle. L'effet chauffant ou le courant gazeux qui circule dans l'enveloppe (3) allume la charge (4) pyrotechnique et détruit par conséquent la membrane de rupture (1). Ce procédé permet l'ouverture de la membrane de rupture (1) très rapide et de manière définie.
PCT/EP1996/003392 1995-08-11 1996-08-01 Systeme pour l'ouverture de la membrane de rupture de bouteilles a gaz comprime dans des generateurs de gaz WO1997006988A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995129553 DE19529553A1 (de) 1995-08-11 1995-08-11 Anordnung zum Öffnen der Berstmembran von Druckgasflaschen in Gasgeneratoren
DE19529553.6 1995-08-11

Publications (1)

Publication Number Publication Date
WO1997006988A1 true WO1997006988A1 (fr) 1997-02-27

Family

ID=7769249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003392 WO1997006988A1 (fr) 1995-08-11 1996-08-01 Systeme pour l'ouverture de la membrane de rupture de bouteilles a gaz comprime dans des generateurs de gaz

Country Status (2)

Country Link
DE (1) DE19529553A1 (fr)
WO (1) WO1997006988A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2024677B2 (fr) † 2006-10-26 2016-11-09 Takata AG Procédé et dispositif de fabrication d'un générateur de gaz et générateur de gaz fabriqué avec le procédé

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702958A1 (de) * 1997-01-28 1998-07-30 Dynamit Nobel Ag Verschlußvorrichtung für einen Druckgasbehälter
AU2002342367A1 (en) 2002-02-14 2003-09-04 Isi Airbag Gmbh Cold gas generator
DE10239780B3 (de) * 2002-08-29 2004-02-12 Trw Airbag Systems Gmbh & Co. Kg Gasgenerator und Fahrzeuginsassen-Schutzsystem
AT6624U1 (de) * 2002-11-29 2004-01-26 Isi Airbag Gmbh Kaltgasgenerator

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736459A (en) * 1952-02-08 1956-02-28 Pyrene Co Ltd Means for the release of compressed fluids from containers
US3088478A (en) * 1960-02-29 1963-05-07 Mcdonnell Aircraft Corp Valve device
US3184097A (en) * 1962-01-19 1965-05-18 Earl E Kilmer Valve with exploding diaphragm
FR1565061A (fr) * 1967-04-29 1969-04-25
US3469733A (en) * 1967-10-31 1969-09-30 Us Navy Rupture disc unit
FR2153856A5 (fr) * 1971-09-23 1973-05-04 Nissan Motor
US3767079A (en) * 1972-05-10 1973-10-23 Gen Motors Corp Pressure vessel sealing arrangement
US3777772A (en) * 1972-09-11 1973-12-11 Gen Motors Corp Flap opening inflator seal arrangement
US3983892A (en) * 1974-12-06 1976-10-05 The United States Of America As Represented By The Secretary Of The Navy Explosive valve
US4424914A (en) * 1982-06-24 1984-01-10 Brown Jr Milton F Air bag explosive device
JPS63214581A (ja) * 1987-02-27 1988-09-07 Mitsui Eng & Shipbuild Co Ltd 緊急開放弁

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3539199A (en) * 1967-09-20 1970-11-10 Eaton Yale & Towne Explosive opening of a fluid container
US3788669A (en) * 1970-09-08 1974-01-29 Nissan Motor Safety device for motor vehicle
JPS507334B1 (fr) * 1970-12-25 1975-03-25
US3746214A (en) * 1971-07-15 1973-07-17 Allied Chem Detonator holder
JPS5151838A (fr) * 1974-10-30 1976-05-07 Nippon Soken
US5263740A (en) * 1991-12-17 1993-11-23 Trw Inc. Hybrid air bag inflator
GB2272754B (en) * 1992-11-23 1996-03-13 Autoliv Dev Improvements in or relating to a gas supply device for an air-bag

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736459A (en) * 1952-02-08 1956-02-28 Pyrene Co Ltd Means for the release of compressed fluids from containers
US3088478A (en) * 1960-02-29 1963-05-07 Mcdonnell Aircraft Corp Valve device
US3184097A (en) * 1962-01-19 1965-05-18 Earl E Kilmer Valve with exploding diaphragm
FR1565061A (fr) * 1967-04-29 1969-04-25
US3469733A (en) * 1967-10-31 1969-09-30 Us Navy Rupture disc unit
FR2153856A5 (fr) * 1971-09-23 1973-05-04 Nissan Motor
US3767079A (en) * 1972-05-10 1973-10-23 Gen Motors Corp Pressure vessel sealing arrangement
US3777772A (en) * 1972-09-11 1973-12-11 Gen Motors Corp Flap opening inflator seal arrangement
US3983892A (en) * 1974-12-06 1976-10-05 The United States Of America As Represented By The Secretary Of The Navy Explosive valve
US4424914A (en) * 1982-06-24 1984-01-10 Brown Jr Milton F Air bag explosive device
JPS63214581A (ja) * 1987-02-27 1988-09-07 Mitsui Eng & Shipbuild Co Ltd 緊急開放弁

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 495 (M - 780) 23 December 1988 (1988-12-23) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2024677B2 (fr) † 2006-10-26 2016-11-09 Takata AG Procédé et dispositif de fabrication d'un générateur de gaz et générateur de gaz fabriqué avec le procédé

Also Published As

Publication number Publication date
DE19529553A1 (de) 1997-02-13

Similar Documents

Publication Publication Date Title
DE4001864C2 (fr)
DE60014910T2 (de) Zweistufige airbagaufblasvorrichtung
DE4229624C2 (de) Aufblasvorrichtung für eine Fahrzeuginsassen-Rückhaltevorrichtung
DE4231356B4 (de) Vorrichtung zum Aufblasen einer aufblasbaren Einrichtung
DE3609668A1 (de) Pyro- oder explosionszuendsatz
DE4231556A1 (de) Aufblasvorrichtungsanordnung
DE19753811A1 (de) Zweistufige Airbagaufblasvorrichtung
DE3742278A1 (de) Gasgenerator-system fuer einen gassack in einem fahrzeug
DE19726275A1 (de) Initiator für eine Airbagaufblasvorrichtung
DE19654315A1 (de) Hybrid-Gasgenerator
DE19732650A1 (de) Leitungstrenner
EP1307363B1 (fr) Generateur de gaz et systeme de retenue pour automobiles
DE102007060265B4 (de) Gasgenerator
DE19925954A1 (de) Mit zündfähigem Gas gestarteter, pyrotechnischer Gasgenerator
EP1702815B1 (fr) Générateur de gaz froid
WO1997006988A1 (fr) Systeme pour l'ouverture de la membrane de rupture de bouteilles a gaz comprime dans des generateurs de gaz
EP0882628B1 (fr) Générateur de gaz
EP0810932A1 (fr) Generateur de gaz, destine en particulier a un airbag, comprenant un recipient a charge et un tuyau de guidage de flammes
DE19541924A1 (de) Gasgenerator
EP0882627B1 (fr) Générateur de gaz et méthode de fonctionnement d'un générateur de gaz
EP0874744B1 (fr) Generateur de gaz pour la production d'un melange de gaz
EP0790906A1 (fr) Generateur de gaz liquide
DE2500003A1 (de) Stroemungsmittelversorgung fuer ein rueckhaltesystem fuer fahrzeuginsassen
WO1997008018A2 (fr) Dispositif d'amorçage premature
DE19601448A1 (de) Verschluß für einen Gasgenerator

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CN JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase