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WO1997008020A1 - Generateur de gaz hybride - Google Patents

Generateur de gaz hybride Download PDF

Info

Publication number
WO1997008020A1
WO1997008020A1 PCT/EP1996/003432 EP9603432W WO9708020A1 WO 1997008020 A1 WO1997008020 A1 WO 1997008020A1 EP 9603432 W EP9603432 W EP 9603432W WO 9708020 A1 WO9708020 A1 WO 9708020A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
combustion chamber
gas
outlet
mixing chamber
Prior art date
Application number
PCT/EP1996/003432
Other languages
German (de)
English (en)
Inventor
Hermann Bauer
Richard Bender
Franz Fürst
Bernhard Vetter
Marc Winterhalder
Siegfried Zeuner
Original Assignee
Trw Airbag Systems Gmbh & Co. Kg
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 Trw Airbag Systems Gmbh & Co. Kg filed Critical Trw Airbag Systems Gmbh & Co. Kg
Publication of WO1997008020A1 publication Critical patent/WO1997008020A1/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
    • 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
    • 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
    • B60R21/263—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 a variable source, e.g. plural stage or controlled output
    • B60R2021/2633—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 a variable source, e.g. plural stage or controlled output with a plurality of inflation levels

Definitions

  • the invention relates to a device for filling a restraint device, in particular an impact cushion (airbag) for protecting the occupants of a motor vehicle, the restraint device being filled by means of an inert gas or gas mixture stored in a pressure container.
  • a restraint device in particular an impact cushion (airbag) for protecting the occupants of a motor vehicle
  • the restraint device being filled by means of an inert gas or gas mixture stored in a pressure container.
  • Hybrid gas generators which can emit a stored cold gas in stages for filling an impact cushion in a motor vehicle, are known, for example, from US Pat. Nos. 5,031,932 or EP 455 435 A2.
  • the hybrid gas generators described therein have at least the disadvantage that the pyrotechnic container necessary for triggering is integrated in the compressed gas container. This design allows only a low level of structural adaptability to the mostly predetermined structure of a motor vehicle. it also complicates the assembly and testing of the individual components of the hybrid gas generator, so that e.g. an inspection of the high pressure container can only be carried out with considerable effort.
  • a device which fills a restraint device, in particular an impact cushion for protecting the occupants of a motor vehicle, with an inert gas or gas mixture, in which the pressure container filled with inert gas or gas mixture has at least two, each with a burstable membrane closed outlet openings has, with each outlet opening is assigned a module for opening, which is triggered independently of one another.
  • the advantages of the invention are, in particular, that the gas can be blown into a baffle cushion in stages when triggered.
  • the modular design enables a good adaptation to the structure of a motor vehicle and permits testing of the individual components of the hybrid gas generator.
  • the figure shows a hybrid gas generator 1, consisting of a first pyrotechnic module 100, a second pyrotechnic module 200 and a pressurized gas container 300.
  • a hybrid gas generator 1 consisting of a first pyrotechnic module 100, a second pyrotechnic module 200 and a pressurized gas container 300.
  • Each pyrotechnic module 100 or 200 is arranged as an insert in a filter housing 2 or 3 with blow-out openings 15 or 25 and essentially consists of an ignition unit 110 or 210 and a combustion chamber unit 120 or 220.
  • the compressed gas container 300 has two outlet nozzles 310 and 320, each of which is closed by a membrane 311 and 321, respectively.
  • Each ignition unit 110 or 21 o contains an electrical igniter 112 or 212 with an electrical connection 111 or 211, which is preferably designed as a plug unit.
  • a high ignition current is supplied to the electric igniter 112 or 212.
  • a fuse wire arranged inside the electric igniter 112 or 212 melts and ignites a primary charge 113 or 213.
  • a secondary charge 114 or 214 serving as an amplifier ignites, the combustion products of which are discharged through nozzles 116 or 216 m flow into the combustion chamber unit 120 or 220.
  • a solid fuel 121 or 221 pressed in the form of a ring or tablet is arranged.
  • Volume compensation means 122 and 222 ensure that the solid fuel 121 and 221 is held securely and prevent the development of noise during driving.
  • the solid fuel 121 or 221 is ignited by the combustion of the secondary charge 114 or 214 and thereby releases a hot gas which escapes from the combustion chamber unit 120 or 220 through nozzle bores 123 or 223.
  • the nozzle bores 123 and 223 are closed with a sealing film 124 and 224, respectively, in order to prevent the mostly moisture-sensitive solid fuel 121 and 221 from absorbing moisture, which leads to a reduction in the burning rate of the solid fuel 121 and 221, respectively.
  • the sealing film 124 or 224 which is usually an aluminum film, the pressure can be determined which arises when the solid fuel 121 or 221 is burned off when triggered. The longer the sealing film 124 or 224 withstands the pressure that builds up, the higher the pressure in the combustion chamber unit 120 or 220 rises.
  • the nozzle bores 123 and 223 are arranged such that the hot gas emerging from the combustion chamber unit 120 and 220 strikes the membrane 311 and 321 in order to weld them on.
  • the diameter of the nozzle bores 123 and 223 must be measured according to how much hot gas has to flow through them in order to achieve a burning through of the membrane 311 or 321 in a very short time, so that the cold gas stored in the compressed gas container 300 can escape.
  • Such an opening mechanism can consist of a mandrel which is driven mechanically, magnetically, pyrotechnically or by means of a combination thereof and which pierces the membrane 311 or 321 in the event of a release.
  • a mixing chamber 13 or 23 arranged around the combustion chamber unit 120 or 320, the cold gas emerging from the compressed gas container 300 mixes with that generated in the combustion chamber unit 120 or 220 Hot gas to a gas mixture with a defined temperature that is low enough not to damage the impact cushion. Since the vast majority consists of the very pure cold gas, a cool and clean gas mixture is produced in the mixing chamber 13 or 23; a complex, multi-stage filter system for cooling and cleaning the gas stream is therefore not necessary; in front of the blow-out openings 15 or 25, only a filter layer 14 or 24 acting as a fine filter is arranged, which consists of fine-meshed filter material and consists of small combustion products filtered out the hot gas.
  • the hybrid gas generator 1 can have a symmetrical structure, i.e. all structural features of the first pyrotechnic module 100 are identical to the structural features of the second pyrotechnic module 200, and the structure of the outlet nozzle 310 corresponds to that of the outlet nozzle 320 and the membrane 311 corresponds to the membrane 321.
  • Module 200 (or vice versa) and simultaneous triggering of modules 100 and 200.
  • the hybrid gas generator 1 in order to be able to optimally adapt the filling of the impact cushion to the severity of the accident in the event of a trigger, the hybrid gas generator 1 must be able to be filled in as many steps as possible.
  • a non-symmetrical structure of the hybrid gas generator 1 is suitable for this, the PV technology modules 100 and 200, the outlet nozzles 310 and 320 and the diaphragms 311 and 321 differing from one another and thereby producing different gas quantities per unit of time.
  • a conceivable asymmetrical structure which is easy to manufacture in terms of production technology, consists in that the outlet nozzles 310 and 320, the membranes 311 and 321 and the pyrotechnic modules 100 and 200 in all constructive details agree and that only the pyro technical components, ie the primary charges 113 and 213, the secondary charges 114 and 214 and the (solid) fuels 121 and 221 only in the type, only in the amount or in type and Differentiate quantity from each other.
  • triggering module 100 only triggering module 200, simultaneous triggering of modules 100 and 200, first triggering module 100, then triggering module 200 and first triggering module 200, then triggering module 100.
  • either the compressed gas container 300 can have more than two outlet openings, each with a module for opening, or another, mainly mechanical opening mechanism can be used so that one or more openings of the compressed gas container 300 can be opened simultaneously or in succession regardless of the triggering of a pyrotechnic module.
  • the conditions must be met that the impact cushion is not damaged by the inflowing gas mixture and that the impact cushion is filled to the extent that it can fulfill its protective function.
  • the modular structure results in a simple and inexpensive construction of the hybrid gas generator.
  • the individual modules and the compressed gas tank can be preassembled and checked separately before all assemblies are connected to one another during final assembly.

Landscapes

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

Abstract

L'invention concerne un dispositif de remplissage d'un élément de retenue, notamment d'un airbag destiné à protéger les passagers d'un véhicule à moteur. Un réservoir sous pression (300) dans lequel est stocké un gaz inerte ou un mélange gazeux, présente au moins deux orifices de sortie (310, 320) fermés chacun par une membrane pouvant éclater (311, 321). Un module d'ouverture (100, 200) est affecté à chaque orifice de sortie (310, 320), le déclenchement de chaque module s'effectuant de façon indépendante.
PCT/EP1996/003432 1995-08-31 1996-08-03 Generateur de gaz hybride WO1997008020A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19532022.0 1995-08-31
DE1995132022 DE19532022A1 (de) 1995-08-31 1995-08-31 Hybrid-Gasgenerator

Publications (1)

Publication Number Publication Date
WO1997008020A1 true WO1997008020A1 (fr) 1997-03-06

Family

ID=7770829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003432 WO1997008020A1 (fr) 1995-08-31 1996-08-03 Generateur de gaz hybride

Country Status (2)

Country Link
DE (1) DE19532022A1 (fr)
WO (1) WO1997008020A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004031002A1 (fr) * 2002-10-01 2004-04-15 Daicel Chemical Industries, Ltd. Gonfleur d'un sac gonflable
US6752421B2 (en) * 2002-01-03 2004-06-22 Automotive Systems Laboratory, Inc. Airbag inflator
WO2004106781A1 (fr) 2003-05-28 2004-12-09 Isuzu Motors Limited Dispositif de stationnement de vehicule
WO2004106124A1 (fr) 2003-05-29 2004-12-09 Daicel Chemical Industries, Ltd. Gonfleur
US7168734B2 (en) 2002-10-01 2007-01-30 Daicel Chemical Industries, Ltd. Inflator for air bag
US7328914B2 (en) 2003-05-29 2008-02-12 Daicel Chemical Industries, Ltd. Inflator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19725475A1 (de) * 1997-06-17 1998-12-24 Dynamit Nobel Ag Gasgenerator
DE102014201419A1 (de) 2014-01-27 2015-07-30 Robert Bosch Gmbh Vorrichtung und Verfahren zum Aktivieren eines Personenschutzmittels für ein Fahrzeug, Herstellungsverfahren zum Herstellen der Vorrichtung und Personenschutzsystem für ein Fahrzeug
DE102019124042A1 (de) * 2019-09-09 2021-03-11 Zf Airbag Germany Gmbh Gasgenerator und verfahren zum betreieben eines gasgenerators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758131A (en) * 1972-01-11 1973-09-11 Allied Chem Inflation apparatus for safety device
FR2227153A1 (fr) * 1973-04-27 1974-11-22 Eaton Corp
US5345876A (en) * 1993-02-04 1994-09-13 Atlantic Research Corporation Hybrid inflator
US5364127A (en) * 1993-06-11 1994-11-15 Trw Inc. Inflator assembly
DE4405997C1 (de) * 1994-02-24 1995-03-30 Temic Bayern Chem Airbag Gmbh Hybrid-Gasgenerator zum Füllen eines Gassacks

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713667A (en) * 1971-08-27 1973-01-30 Gen Motors Corp Occupant restraint system
US3836167A (en) * 1971-09-27 1974-09-17 Irvin Air Chute Ltd Vehicle safety apparatus
BE778386R (fr) * 1971-10-28 1972-05-16 Prb Sa Dispositif de protection d'occupant de
US3966228A (en) * 1972-08-04 1976-06-29 Eaton Corporation Sequenced orifice fluid supply for occupant restraint system
DE3738436C1 (de) * 1987-11-12 1988-11-24 Bayern Chemie Gmbh Flugchemie Elektrische Anzuendeinrichtung
DE4002662A1 (de) * 1990-01-30 1991-08-08 Heckler & Koch Gmbh Verfahren zum fuellen eines airbags und sicherheitssystem vom airbag-typ
US5069478A (en) * 1990-07-24 1991-12-03 Kim Ki I Electromagnetic inflator used in compact vehicle air bag apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758131A (en) * 1972-01-11 1973-09-11 Allied Chem Inflation apparatus for safety device
FR2227153A1 (fr) * 1973-04-27 1974-11-22 Eaton Corp
US5345876A (en) * 1993-02-04 1994-09-13 Atlantic Research Corporation Hybrid inflator
US5364127A (en) * 1993-06-11 1994-11-15 Trw Inc. Inflator assembly
DE4405997C1 (de) * 1994-02-24 1995-03-30 Temic Bayern Chem Airbag Gmbh Hybrid-Gasgenerator zum Füllen eines Gassacks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752421B2 (en) * 2002-01-03 2004-06-22 Automotive Systems Laboratory, Inc. Airbag inflator
WO2004031002A1 (fr) * 2002-10-01 2004-04-15 Daicel Chemical Industries, Ltd. Gonfleur d'un sac gonflable
US7168734B2 (en) 2002-10-01 2007-01-30 Daicel Chemical Industries, Ltd. Inflator for air bag
WO2004106781A1 (fr) 2003-05-28 2004-12-09 Isuzu Motors Limited Dispositif de stationnement de vehicule
WO2004106124A1 (fr) 2003-05-29 2004-12-09 Daicel Chemical Industries, Ltd. Gonfleur
US7328914B2 (en) 2003-05-29 2008-02-12 Daicel Chemical Industries, Ltd. Inflator

Also Published As

Publication number Publication date
DE19532022A1 (de) 1997-03-06

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