WO2006045594A1 - Generateur de gaz pour systemes de protection des passagers - Google Patents

Generateur de gaz pour systemes de protection des passagers Download PDF

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Publication number
WO2006045594A1
WO2006045594A1 PCT/EP2005/011444 EP2005011444W WO2006045594A1 WO 2006045594 A1 WO2006045594 A1 WO 2006045594A1 EP 2005011444 W EP2005011444 W EP 2005011444W WO 2006045594 A1 WO2006045594 A1 WO 2006045594A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas generator
chamber
generator according
reinforcing element
gas
Prior art date
Application number
PCT/EP2005/011444
Other languages
German (de)
English (en)
Inventor
Thomas Reiter
Karl Heinz Sommer
Ullrich Becker
Original Assignee
Autoliv Development Ab
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 Autoliv Development Ab filed Critical Autoliv Development Ab
Priority to EP05806543A priority Critical patent/EP1805068A1/fr
Publication of WO2006045594A1 publication Critical patent/WO2006045594A1/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
    • 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 gas generator for occupant protection systems of motor vehicles, preferably airbags, having at least one chamber which can be exposed to a high internal pressure.
  • the occupant protection systems of motor vehicles which contribute significantly to increasing vehicle safety, include airbags for many years.
  • airbags In these hybride and pyrotechnic gas generators are used in large quantities. While focused on the development of gas generators in the Vergan ⁇ tunity focus essentially on the safe operation of gas generators over long periods of time, is increasingly recently tried * to reduce the cost and weight of the gas generators. It should be borne in mind that the cost of the gas generator is approximately 40% of the total module costs. It follows that a reduction of the material and Vietnameses ⁇ cost for the gas generator with consistently safe function has a high priority. On the other hand, a weight reduction is of particular importance, since the number of airbags and thus the gas generators used for this purpose per vehicle increases. For gas generators preferred tubular designs are used, since they have a high static strength. Tubes or pipe segments are comparatively simple and inexpensive to produce. The pipes must be designed with a sufficient safety factor compared to the maximum occurring operating pressure.
  • the object of the invention is to reduce the overall weight of gas generators, in particular hybrid gas generators, by improving the static strength.
  • At least one reinforcing element is arranged in the at least one chamber which can be exposed to a high internal pressure, which counteracts an outward buckling of the chamber wall.
  • the necessary wall thickness of the chamber can be reduced to the minimum required from the static calculation.
  • the reinforcing element By inserting the reinforcing element into the interior of the chamber, internal stiffening of the structure is achieved. This leads to a more uniform load distribution in the structure and to lower deformations.
  • a compressed gas can be stored in the chamber.
  • a pyrotechnic chamber for receiving a gas-forming material may be arranged in the gas generator.
  • the high internal pressure exposable chamber is preferably cylindrical aus ⁇ formed.
  • the at least one reinforcing element may be an annular element.
  • the reinforcing element may preferably hold the container containing the pyrotechnic material.
  • the at least one reinforcing element can subdivide the chamber, which can be exposed in a high internal pressure, into a plurality of chambers.
  • the at least one reinforcing element is particularly advantageously designed as a closure cap with a bursting membrane inserted.
  • the same pipe segment is used as a single part.
  • Hier ⁇ by different gas generators of identical individual components can be produced in a preferred manner.
  • the system technology used can be maintained almost unchanged. Only Einzel Einbautei Ie be changed, so that the total cost of gas generator production can be further reduced.
  • the reinforcing elements can be arranged in the region of chamber wall tapers or chamber wall beads and connected to the chamber wall. As a result, the static strength of the construction in the interior of the chamber is even further improved.
  • the at least one reinforcing element can be connected to the chamber wall via welded connections, preferably a friction or laser welding connection.
  • gas generators with two separate pressure systems for each stage are assembled from single pressure cylinders with connecting components to a gas generator.
  • gas generators and pressure cylinders are connected or welded from tube components with end caps.
  • such a gas generator with two separate or combined pressure vessels can be produced from a single tube segment which serves as a chamber.
  • the previous Endkap ⁇ pen the pressure vessels can here as by the reinforcing elements in the interior of the tube welded ring closure caps are formed with optionally introduced bursting membranes. This results in short, almost ball-shaped pressure vessels, which can be pressurized considerably higher with the same wall thickness.
  • the use of laser or friction welding allows a cost-effective production here.
  • FIG. 1 shows a tubular gas generator according to a first embodiment of the present invention
  • FIG. 2 shows a tubular gas generator according to FIG. 1 in a modified embodiment variant
  • FIG. 3 shows a gas generator according to the invention in accordance with a two-stage embodiment variant
  • Figure 4 another two-stage embodiment of the gas generator according to the invention.
  • FIG. 1 shows a gas generator in the form of a hybrid gas generator is shown in Thomasdar ⁇ position, wherein the main body of this gas generator 10 as Rohrseg ⁇ ment 1 2 is formed.
  • the diameter of the tube segment is reduced in its center region.
  • annular elements 14 serving as reinforcing elements are provided in the interior of the tube segment 12 in the region of the taper of the tube segment perpendicular to the outer wall. These annular elements are perpendicular to the outer wall of the pipe segment 12. They are connected to the outer wall of the pipe segment 12 by a suitable joining method, for example by friction welding or laser welding.
  • the annular element 14 can be brought in each case from one side or from both sides of the tube segment 12.
  • the welded connection 16 is located in the exemplary embodiment shown here in the region of the diameter reduction of the tube segment 12.
  • two pyrotechnic charges are provided in the tube segment 12 in the embodiment according to FIG. 1, two pyrotechnic charges are provided.
  • Denoted by 20 is a bursting membrane.
  • FIG. 2 essentially corresponds to that according to FIG. 1.
  • the same parts are designated by the same reference numerals.
  • the tube segment has two beads 22.
  • the annular elements 14 are arranged, wherein These simultaneously enclose the pyrotechnic charges and thereby hold, as shown in Figure 2.
  • the static load distribution in the tube segment 12 changes.
  • the tubular chamber is stiffened so that the individual segments behave zwi ⁇ tween the ring segments as individual gas generators. Critical load limits are therefore only reached much later. This allows a higher pressure filling of the gas generator with the same pipe wall thickness, while maintaining the same safety coefficient of the pressure vessel. On the other hand, it is also possible to reduce the wall thickness of the tube with the same pressure filling.
  • annular elements 14 are used as reinforcing elements in FIGS. 1 and 2, they can of course also have a different shape. They can be designed, for example, in the form of spokes or in any other way.
  • FIG. 3 shows a two-stage gas generator with an inner second stage with puncture protection.
  • a gas generator with two separate systems can be formed from a tube segment 12 by using a closed cap 24 as a reinforcing element, which has an opening closed with a bursting membrane 26.
  • FIG. 4 two sealing caps 24, which are each closed by bursting membranes 26, are used. This results in a two-stage Gasgenera ⁇ gate with a gas outlet system 30 arranged in the center, in which case by providing a partition wall 28, two completely separate pressure vessels are produced.
  • the solution proposed here with reference to the embodiments according to FIG. 3 and FIG. 4 basically permits the production of very different gas generators using the same individual components and the same external dimensions. It is possible to install a modular system for gas generators. different function with the same manufacturing steps and the same technology to provide.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

La présente invention concerne un générateur de gaz destiné à des systèmes de protection des passagers de véhicules automobiles, de préférence des airbags, comprenant au moins une chambre à laquelle peut être appliquée une pression interne élevée. Selon l'invention, la chambre contient au moins un élément de renfort qui agit contre la déformation de la paroi de la chambre vers l'extérieur.
PCT/EP2005/011444 2004-10-26 2005-10-25 Generateur de gaz pour systemes de protection des passagers WO2006045594A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05806543A EP1805068A1 (fr) 2004-10-26 2005-10-25 Generateur de gaz pour systemes de protection des passagers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004052037.2 2004-10-26
DE200410052037 DE102004052037A1 (de) 2004-10-26 2004-10-26 Gasgenerator für Insassenschutzsysteme

Publications (1)

Publication Number Publication Date
WO2006045594A1 true WO2006045594A1 (fr) 2006-05-04

Family

ID=35500811

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/011444 WO2006045594A1 (fr) 2004-10-26 2005-10-25 Generateur de gaz pour systemes de protection des passagers

Country Status (3)

Country Link
EP (1) EP1805068A1 (fr)
DE (1) DE102004052037A1 (fr)
WO (1) WO2006045594A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060265B4 (de) 2007-12-14 2014-10-30 Trw Airbag Systems Gmbh Gasgenerator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519605A1 (de) * 1995-05-29 1996-04-04 Daimler Benz Ag Airbag-Hochdruckspeicher
EP0768218A1 (fr) * 1995-10-10 1997-04-16 Morton International, Inc. Gonfleur à combustible fluide et inversion de l'écoulement
US6233908B1 (en) * 1998-12-24 2001-05-22 Autoliv Asp, Inc. Method of introducing a leak trace material into an airbag inflator
WO2003051685A1 (fr) * 2001-12-14 2003-06-26 Breed Automotive Technology, Inc. Dispositif d'ouverture pour dispositif de gonflage a gaz froid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519605A1 (de) * 1995-05-29 1996-04-04 Daimler Benz Ag Airbag-Hochdruckspeicher
EP0768218A1 (fr) * 1995-10-10 1997-04-16 Morton International, Inc. Gonfleur à combustible fluide et inversion de l'écoulement
US6233908B1 (en) * 1998-12-24 2001-05-22 Autoliv Asp, Inc. Method of introducing a leak trace material into an airbag inflator
WO2003051685A1 (fr) * 2001-12-14 2003-06-26 Breed Automotive Technology, Inc. Dispositif d'ouverture pour dispositif de gonflage a gaz froid

Also Published As

Publication number Publication date
EP1805068A1 (fr) 2007-07-11
DE102004052037A1 (de) 2006-04-27

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