WO1997010125A1 - Air bag system - Google Patents

Air bag system Download PDF

Info

Publication number
WO1997010125A1
WO1997010125A1 PCT/EP1996/003743 EP9603743W WO9710125A1 WO 1997010125 A1 WO1997010125 A1 WO 1997010125A1 EP 9603743 W EP9603743 W EP 9603743W WO 9710125 A1 WO9710125 A1 WO 9710125A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
airbag system
fibers
air bag
gas flow
Prior art date
Application number
PCT/EP1996/003743
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Rödig
Armin Stark
Siegfried Zeuner
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 WO1997010125A1 publication Critical patent/WO1997010125A1/en

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
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • 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
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • 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
    • B60R21/264—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 generation of gas, e.g. pyrotechnic
    • B60R21/2644—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 generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder

Definitions

  • the present invention relates to an airbag system for reducing the kinetic energy of a vehicle occupant in a vehicle accident with strong negative acceleration, in which an airbag can be inflated by a gas generated in a combustion chamber and by an airbag before it emerges from the combustion chamber Gas flow filter is cleaned
  • airbag gas generators produce gas for filling an airbag, which then protects the vehicle occupants from impact on hard vehicle interior parts such as the steering wheel
  • an igniter is ignited in the gas generator. This ignition is amplified by a so-called ignition charge to generate hot particles. These hot particles then hit the surface of the fuel, which is usually in tablet form, which then ignites itself and in the so-called combustion chamber under high pressure burns, so that gas for filling the airbag is formed.
  • the gas flow is cleaned by appropriate gas flow filters in the filter chamber before it leaves the gas generator
  • the known airbag system uses an airbag made of an organic sack material. At very high temperatures of the gas flow and the hot particles, which are always generated, for example, in gas generators with so-called azide-free fuel systems, the known sack material-related ones cannot adequately thermal or mechanical 0125 PCI7EP96 / 03743
  • the hot gas flow and the hot particles damage the organic sack material, in particular in the area of the so-called sack mouth, since it partially melts or burns the sack material, but at least causes holes to form comes in the airbag
  • the airbag of the known airbag system has ventholes of different sizes and numbers, from which the gas can escape after the sack is deployed and which ensure that the vehicle mass is caught in a smooth manner. This results in solid combustion residues, some of which are hot with azide-free fuels of fine dust via the ventilation openings in the vehicle interior, so that the vehicle mass is harmed to health
  • Air bags of known airbag systems are usually made of polyamide and, if necessary, additionally coated with silicone or neoprene. These bag materials melt or coke at very high gas or particle temperatures, especially in the case of azide-free fuel systems, mainly in the area of the bag mouth to which the gas generator is attached As a result, adequate protection of the vehicle mass against these health-damaging gases such as carbon monoxide, nitrous gases and ammonia is not sufficiently possible
  • Air bags of other known airbag systems therefore have fiber materials made of polyparaphenylene terephthalamide (aramid), which is known, for example, under the brands Kevlar or Twaron.
  • aramid polyparaphenylene terephthalamide
  • these more heat-resistant fiber materials are expensive and also consist of an organic basic structure, so that there is also a further risk of carbon monoxide formation
  • gas flow filters are also used, in which ceramic short-cut fibers are incorporated in an organic plastic matrix. Therefore, these gas flow filters also have a high pollutant and dirt load at high gas flow temperatures
  • the present invention is based on the object of further developing the known airbag system in such a way that pollution of the vehicle mass due to the filling of the airbag of the airbag system with a hot gas is prevented without impairing the efficiency of the airbag system
  • At least partial areas of the airbag have one or more layers of fabric or braid layers which are composed of individual, interconnected fibers from an inorganic, preferably ceramic, fiber material
  • a flexible and deformable airbag can be manufactured, which Position is easy to process and in the inflated state can successfully reduce the kinetic energy of the vehicle occupant, so that a vehicle occupant hitting the airbag is not damaged in a vehicle accident.
  • the airbag has the further advantage that the inorganic or ceramic fiber materials have a low weight.
  • the fiber materials of the airbag system according to the invention have a high resistance to wear, corrosion and oxidation, since airbag systems installed in a vehicle are usually not used over a longer period of time, generally never at all .
  • the mesh size and material thickness of the airbag and also of the gas flow filter can advantageously be set as desired.
  • a gas flow filter is formed which can retain hot combustion residues in the filter chamber without being damaged itself.
  • Endless filaments of inorganic fibers which can be processed into meshes of different sizes, have the further advantage that they are much lighter, more resistant to high temperatures and more flexible than conventional filter materials.
  • the individual fibers can be knotted or crossed with one another, so that different woven or braided layers can be produced which meet all the requirements placed on today's airbag systems.
  • the fabric or braid layers made of fiber material are applied in the area of a sack mouth of the air bag. Since the bag mouth is connected to the gas generator of the airbag system so that the hot gas generated by the gas generator penetrates into the airbag via the bag mouth, it is particularly important to Provide flame protection in this area of the airbag.
  • One or more layers of suitably cut fabric or braid layers made from an inorganic or ceramic fiber material are therefore preferably sewn in the area of the bag mouth as flame protection.
  • the fabric or braid layers of fiber material are sewn onto an inner or outer skin of the airbag.
  • Specially shaped fiber materials can be used as flame protection or as filter elements be attached to particularly important areas of the airbag.
  • the fabric or braid layers are arranged on ventholes of the airbag.
  • the ventilation openings can be covered by fabric or braid layers in such a way that on the one hand the gas can escape from the airbag and a soft collection of the vehicle occupant is ensured and on the other hand hot gas particles be held back.
  • bands of fiber material are attached as filter elements to metal walls of the filter chamber of the gas flow filter, the effectiveness and temperature resistance of the gas flow filter can be increased and at the same time the weight of the gas flow filter can be reduced. It would also be conceivable to use conventional gas flow filters made of metal with gas flow filters according to the invention of fiber material to be combined by gluing suitable strips of fiber material which have been cut to length to the metal walls or being fixed in some other way.
  • the fibers consist of metal oxides. Such fibers have a particularly good adsorption and catalytic behavior, so that hot particles of the gas stream generated by the gas generator are filtered or retained.
  • the fibers can advantageously be made from Al 2 0 3 , which due to their high specific surface energy has a good adsorption capacity. possess good catalytic properties and high mechanical dimensional stability at high temperatures.
  • the fibers are made from Si0 2 .
  • SiO 2 belongs to the group of cross-linked amorphous solids and can be formed with the most varied network structures by adding various additive oxides, such as Na 2 O, so that optimal fibers can be created for use in airbag systems.
  • the fibers are made from B 2 Oj, which due to its molecular structure with a partially ionic and partially covalent bond also has preferred adsorption and catalyst properties.
  • the fibers have a temperature resistance above 1000 ° C without significantly affecting their mechanical properties and a melting point above 1600 ° C. This is particularly important if the woven or braided layers made of inorganic or ceramic fibers are designed as gas flow filters and are used where the hottest temperature of the gas flow is present, namely directly at the outlet opening of the combustion chamber.
  • FIG. 1 shows a schematic perspective illustration of an airbag of the airbag system according to the invention, in which woven or braided layers of fiber material are attached in the region of a mouth of the airbag, and
  • FIG. 2 shows a schematic perspective illustration of a further airbag of the airbag system according to the invention, in which fabric or braid layers made of fiber material are arranged on vent holes of the airbag
  • FIG. 1 shows a perspective view of an airbag 10 of an airbag system according to the invention in the unfolded, inflated state.
  • a gas generated in a gas generator has penetrated into the airbag 10 via a bag opening 11, since a bag mouth 12 of the airbag 10 is connected to an opening of the gas generator The gas generator is not shown in the figure.
  • the gas is at a high temperature, so that the bag mouth 12 and surrounding edge areas of the bag mouth 12 are also exposed to high temperatures and hot particles.
  • Tissue layers 13 made of an inorganic fiber material are in the area of the bag mouth 12 attached and serve as a flame retardant layer. If necessary, several layers of the fabric layer 13 can also be provided in order to protect the area around the bag mouth 12 from melting or coking even at high temperatures
  • FIG. 2 shows a perspective illustration of an airbag 20 of a further airbag system according to the invention, into which a hot gas has penetrated through a bag opening 21, so that the airbag 20 is shown in FIG. 2 in the inflated, unfolded state.
  • the airbag 20 is Connected via a bag mouth 22 to a gas generator for generating the hot gas stream, which is not shown in the figure.
  • the air bag 20 has a vent opening 23, which is also referred to as a venthole. The gas can escape again from the ventilation opening 23 after the bag has been deployed and ensure that the vehicle occupant bouncing onto the air bag 20 is captured softly.
  • a fabric layer 24 made of an inorganic fiber material is attached over the ventilation opening 23.
  • a plurality of ventilation openings 23 can also be provided, which are of different sizes and are covered with different layers of the fabric layer 24.
  • the fabric layer 24 is sewn onto the airbag 20 and serves on the one hand as a gas flow filter for the escaping gas and on the other hand as a flame retardant layer.

Landscapes

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

Abstract

An air bag system for dissipating the kinetic energy of a vehicle passenger during a road accident followed by a strong, negative acceleration has an air bag (10; 20) that may be inflated by gas generated in a combustion chamber and purified through a gas flow filter before leaving the filter chamber. At least some partial areas of the air bag (10) and/or gas flow filter have one or several plies of woven or knitted fabric layers (13; 24) made of individual bonded fibres of an inorganic, preferably ceramic, fibrous material. This protects the vehicle passengers from the pollutants emitted when the air bag of the air bag system is filled with hot gas without reducing the effectiveness of the air bag system.

Description

Airbaαsvstem Airbaαsvstem
Die vorliegende Erfindung betrifft ein Airbagsystem zum Abbau der kineti¬ schen Energie eines Fahrzeuginsassen bei einem Fahrzeugunfall mit starker negativer Beschleunigung, bei dem ein Luftsack durch ein in einer Brenn- kammer erzeugtes Gas aufblasbar ist, das vor dem Austritt aus der Brenn¬ kammer durch einen Gasstromfilter gereinigt wirdThe present invention relates to an airbag system for reducing the kinetic energy of a vehicle occupant in a vehicle accident with strong negative acceleration, in which an airbag can be inflated by a gas generated in a combustion chamber and by an airbag before it emerges from the combustion chamber Gas flow filter is cleaned
Ein derartiges Airbagsystem ist aus der DE 41 35 299 A1 bekanntSuch an airbag system is known from DE 41 35 299 A1
im Falle eines Aufprallunfalls eines Fahrzeugs erzeugen sogenannte Air- bag-Gasgeneratoren Gas zum Füllen eines Luftsackes, der dann die Fahrzeug¬ insassen vor dem Aufprall auf harte Fahrzeuginnenteile wie das Lenkrad schützt Bekannte Airbagsysteme verwenden meist Gasgeneratoren pyro¬ technischer Art wenn eine sensorik des Airbagsystems einen Aufprallunfall des Fahrzeugs erkennt wird ein Anzünder im Gasgenerator gezündet Diese Anzündung wird durch eine sogenannte Anzundladung zur Erzeugung heißer Partikel verstärkt Diese heißen Partikel treffen dann auf die Oberflache des meist in Tablettenform vorliegenden Treibstoffes, der dann selbst zündet und in der sogenannten Brennkammer unter einem hohen Druck abbrennt, so daß Gas zum Füllen des Luftsackes entsteht Da neben reinem Gas auch noch flussige bzw feste Bestandteile bei der Verbrennung entstehen, wird der Gasstrom durch entsprechende Gasstromfilter in der Filterkammer vor Austritt aus dem Gasgenerator gereinigtin the event of a collision of a vehicle, so-called airbag gas generators produce gas for filling an airbag, which then protects the vehicle occupants from impact on hard vehicle interior parts such as the steering wheel In the event of a collision in the vehicle, an igniter is ignited in the gas generator.This ignition is amplified by a so-called ignition charge to generate hot particles.These hot particles then hit the surface of the fuel, which is usually in tablet form, which then ignites itself and in the so-called combustion chamber under high pressure burns, so that gas for filling the airbag is formed. In addition to pure gas, liquid or solid components are also formed during combustion, the gas flow is cleaned by appropriate gas flow filters in the filter chamber before it leaves the gas generator
Das bekannte Airbagsystem verwendet einen Luftsack aus einem organi¬ schen Sackmaterial Bei sehr hohen Temperaturen des Gasstroms und der heißen Partikel die beispielsweise bei Gasgeneratoren mit sogenannten azidfreien Treibstoffsystemen immer erzeugt werden, können die bekann¬ ten sackmateπahen keinen ausreichenden thermischen bzw mechanischen 0125 PCI7EP96/03743The known airbag system uses an airbag made of an organic sack material. At very high temperatures of the gas flow and the hot particles, which are always generated, for example, in gas generators with so-called azide-free fuel systems, the known sack material-related ones cannot adequately thermal or mechanical 0125 PCI7EP96 / 03743
Schutz des auf den Luftsack aufprallenden Fahrzeugmsassen gewahrleisten Durch den heißen Gasstrom und die heißen Partikel wird das organische Sackmaterial, insbesondere im Bereich des sogenannten Sackmundes, be¬ schädigt, da es teilweise zu einem Anschmelzen oder Verbrennen des sack- mateπals, zumindest aber zu einer Locherbildung in dem Luftsack kommtEnsure protection of the vehicle mass impacting on the airbag. The hot gas flow and the hot particles damage the organic sack material, in particular in the area of the so-called sack mouth, since it partially melts or burns the sack material, but at least causes holes to form comes in the airbag
Der Luftsack des bekannten Airbagsystems weist Entluftungsoffnungen (Ventholes) unterschiedlicher Große und Anzahl auf, aus denen das Gas nach der Sackentfaltung wieder entweichen kann und die bei einem Unfall ein weiches Auffangen des Fahrzeugmsassen sicherstellen Dabei gelangen feste, bei azidfreien Treibstoffen zum Teil heiße Verbrennungsruckstande in Form von Feinstaub über die Entluftungsoffnungen in den Fahrzeugmnen- raum, so daß es zu cesundheitsschadigungen des Fahrzeugmsassen kommtThe airbag of the known airbag system has ventholes of different sizes and numbers, from which the gas can escape after the sack is deployed and which ensure that the vehicle mass is caught in a smooth manner.This results in solid combustion residues, some of which are hot with azide-free fuels of fine dust via the ventilation openings in the vehicle interior, so that the vehicle mass is harmed to health
Luftsacke bekannter Airbagsysteme sind meist aus Polyamid hergestellt und ggf zusätzlich mit Silikon oder Neopren beschichtet Diese sackmateπalien schmelzen bzw verkoken bei sehr hohen Gas- bzw Partikeltemperaturen, insbesondere bei azidfreien Treibstoff Systemen, hauptsächlich im Bereich des sackmundes, an dem der Gasgenerator befestigt ist Dies hat zur Folge, daß ein ausreichender Schutz des Fahrzeugmsassen vor diesen gesundheits- schädigenden Gasen wie beispielsweise Kohlenstoffmonoxid, nitrosen Gasen und Ammoniak nicht ausreichend möglich istAir bags of known airbag systems are usually made of polyamide and, if necessary, additionally coated with silicone or neoprene. These bag materials melt or coke at very high gas or particle temperatures, especially in the case of azide-free fuel systems, mainly in the area of the bag mouth to which the gas generator is attached As a result, adequate protection of the vehicle mass against these health-damaging gases such as carbon monoxide, nitrous gases and ammonia is not sufficiently possible
Luftsacke anderer bekannter Airbagsysteme weisen daher Fasermaterialien aus Polyparaphenylenterephthalamid (Aramid) auf, das z B unter den Mar- ken Kevlar oder Twaron bekannt ist. Diese warmeresistenteren Fasermate¬ rialien sind jedoch teuer und bestehen ebenfalls aus einem organischen Grundgerust, so daß auch die Gefahr der Kohlenmonoxidbildung weiter be¬ stehtAir bags of other known airbag systems therefore have fiber materials made of polyparaphenylene terephthalamide (aramid), which is known, for example, under the brands Kevlar or Twaron. However, these more heat-resistant fiber materials are expensive and also consist of an organic basic structure, so that there is also a further risk of carbon monoxide formation
wiederum andere Airbagsysteme besitzen Luftsacke, bei denen die Entluf¬ tungsoffnungen (Ventholes) durch unterschiedlich durchlassige Fasermate¬ rialien aus Polyparaphenylenterephthalamid (Kevlar) ersetzt sind Austretender Feinstaub des Gasstroms ist zwar bei diesen Airbagsystemen auf ein Minimum reduziert, es ist aber eine Schadstoffbelastung des Fahr- zeuginsassen durch Kohlenstoffmonoxid und andere schädigende Gase im¬ mer noch vorhanden, zudem sind diese Luftsacke sehr teuerstill other airbag systems have airbags in which the vent openings are replaced by differently permeable fiber materials made of polyparaphenylene terephthalamide (Kevlar). Victims of carbon monoxide and other harmful gases are still present, and these air bags are also very expensive
Bei der Erzeugung des Gasstromes wird der gesamte Treibstoff unter Bil¬ dung von festen, flussigen und gasformigen Verbrennungsprodukten voll- standig umgesetzt Die festen und flussigen Verbrennungsprodukte werden dabei durch verschiedene Gasstromfilter größtenteils zurückgehalten Be¬ kannte Airbagsysteme verwenden beispielsweise Edelstahlsiebe mit unter¬ schiedlicher Dicke und Maschenweite, die sich aber nachteiligerweise un¬ gunstig auf das Gesamtgewicht des Airbagsystems auswirken Zum Teil wer- den auch Gasstromfilter eingesetzt, bei denen keramische Kurzschnittfasern in einer organischen Kunststoffmatrix eingebunden sind Daher ist auch bei diesen Gasstromfiltern eine hohe schadgas- und Schmutzbelastung bei hohen Gasstromtemperaturen gegebenDuring the generation of the gas flow, the entire fuel is completely converted, forming solid, liquid and gaseous combustion products. The solid and liquid combustion products are largely retained by various gas flow filters. Known airbag systems use, for example, stainless steel sieves with different thicknesses and mesh sizes which, however, disadvantageously have an unfavorable effect on the total weight of the airbag system. In some cases, gas flow filters are also used, in which ceramic short-cut fibers are incorporated in an organic plastic matrix. Therefore, these gas flow filters also have a high pollutant and dirt load at high gas flow temperatures
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, das bekannte Air¬ bagsystem derart weiterzuentwickeln, daß eine Schadstoffbelastung des Fahrzeugmsassen aufgrund der Füllung des Luftsackes des Airbagsystems mit einem heißen Gas verhindert wird, ohne den Wirkungsgrad des Airbag¬ systems zu beeinträchtigenThe present invention is based on the object of further developing the known airbag system in such a way that pollution of the vehicle mass due to the filling of the airbag of the airbag system with a hot gas is prevented without impairing the efficiency of the airbag system
Diese Aufgabe wird dadurch gelost, daß zumindest Teilbereiche des Luft¬ sackes eine oder mehrere Lagen von Gewebe- oder Geflechtschichten auf¬ weisen, die aus einzelnen, miteinander verbundenen Fasern aus einem an¬ organischen, vorzugsweise keramischen Fasermaterial zusammengesetztThis object is achieved in that at least partial areas of the airbag have one or more layers of fabric or braid layers which are composed of individual, interconnected fibers from an inorganic, preferably ceramic, fiber material
Da anorganische, insbesondere keramische Fasermaterialien aufgrund ihrer chemischen Natur eine wesentlich höhere Temperaturbelastbarkeit im ver¬ gleich zu den bekannten sackmateπalien aufweisen, kann ein Luftsack des erfindungsgemaßen Airbagsystems durch das heiße Gas nicht beschädigt werden Deshalb können auch keine für den Fahrzeugmsassen schädlichen Gase freigesetzt werdenSince inorganic, in particular ceramic, fiber materials, owing to their chemical nature, have a significantly higher temperature resistance than the known bag materials, an air bag of the airbag system according to the invention cannot be damaged by the hot gas. Therefore, no gases which are harmful to the vehicle mass can be released
Durch den Einsatz von anorganischen oder keramischen Fasermaterialien laßt sich ein flexibler und verformbarer Luftsack fertigen, der bei der Her- Stellung gut verarbeitbar ist und im aufgeblasenen zustand die kinetische Energie des Fahrzeuginsassen erfolgreich abbauen kann, so daß ein auf den Luftsack aufprallender Fahrzeuginsasse bei einem Fahrzeugunfall nicht ge¬ schadigt wird. Der Luftsack hat den weiteren vorteil, daß die anorganischen bzw. keramischen Fasermaterialien ein geringes Gewicht aufweisen.By using inorganic or ceramic fiber materials, a flexible and deformable airbag can be manufactured, which Position is easy to process and in the inflated state can successfully reduce the kinetic energy of the vehicle occupant, so that a vehicle occupant hitting the airbag is not damaged in a vehicle accident. The airbag has the further advantage that the inorganic or ceramic fiber materials have a low weight.
Ebenso wichtig und vorteilhaft ist es, daß die Fasermaterialien des erfin¬ dungsgemäßen Airbagsystems eine hohe Verschleiß-, Korrosions- und Oxida- tionsbestandigkeit besitzen, da in ein Fahrzeug eingebaute Airbagsysteme meist über einen längeren Zeitraum hinweg nicht zum Einsatz kommen, in der Regel überhaupt nie.It is equally important and advantageous that the fiber materials of the airbag system according to the invention have a high resistance to wear, corrosion and oxidation, since airbag systems installed in a vehicle are usually not used over a longer period of time, generally never at all .
Aufgrund der guten verarbeitbarkeit und Formbarkeit der Fasern aus einem anorganischen oder keramischen Fasermaterial läßt sich die Maschenweite und Materialdicke des Luftsackes und auch des Gasstromfilters vorteil- hafterweise beliebig einstellen.Due to the good processability and formability of the fibers made of an inorganic or ceramic fiber material, the mesh size and material thickness of the airbag and also of the gas flow filter can advantageously be set as desired.
Mit Hilfe der teilweise durchlassigen und hochtemperaturfesten Gewebe¬ schichten aus anorganischen Fasermaterialien wird ein Gasstromfilter gebil¬ det, der heiße Verbrennungsruckstände in der Filterkammer zurückhalten kann, ohne selbst beschädigt zu werden. Endlose Filamente anorganischer Fasern, die zu unterschiedlich großen Maschengeflechten verarbeitet wer¬ den können, haben den weiteren vorteil, daß sie im vergleich zu konven¬ tionellen Filtermateπalien wesentlich leichter, hochtemperaturfester und außerdem flexibler formbar sind.With the aid of the partially permeable and high-temperature-resistant fabric layers made of inorganic fiber materials, a gas flow filter is formed which can retain hot combustion residues in the filter chamber without being damaged itself. Endless filaments of inorganic fibers, which can be processed into meshes of different sizes, have the further advantage that they are much lighter, more resistant to high temperatures and more flexible than conventional filter materials.
Die einzelnen Fasern können, auf einer mikroskopischen Skala gesehen, mit¬ einander verknotet oder gekreuzt sein, so daß sich unterschiedliche Gewe¬ be- oder Geflechtschichten fertigen lassen, die sämtlichen Anforderungen, die an heutige Airbagsysteme gestellt werden, genügen.Viewed on a microscopic scale, the individual fibers can be knotted or crossed with one another, so that different woven or braided layers can be produced which meet all the requirements placed on today's airbag systems.
Bei einer besonders bevorzugten Ausführungsform sind die Gewebe- oder Geflechtschichten aus Fasermaterial im Bereich eines Sackmundes des Luft- sackes angebracht. Da der Sackmund mit dem Gasgenerator des Airbagsy¬ stems verbunden ist, damit das durch den Gasgenerator erzeugte heiße Gas über den Sackmund in den Luftsack eindringt, ist es besonders wichtig, ei- nen Flammschutz in diesem Bereich des Luftsackes vorzusehen. Als Flamm¬ schutz werden daher bevorzugt eine oder mehrere Lagen entsprechend zu¬ geschnittener Gewebe- oder Geflechtschichten aus einem anorganischen oder keramischen Fasermateπal im Bereich des Sackmundes eingenaht.In a particularly preferred embodiment, the fabric or braid layers made of fiber material are applied in the area of a sack mouth of the air bag. Since the bag mouth is connected to the gas generator of the airbag system so that the hot gas generated by the gas generator penetrates into the airbag via the bag mouth, it is particularly important to Provide flame protection in this area of the airbag. One or more layers of suitably cut fabric or braid layers made from an inorganic or ceramic fiber material are therefore preferably sewn in the area of the bag mouth as flame protection.
um Beschadigungen des Luftsackes und damit Verletzungen der Fahrzeugin¬ sassen zu vermeiden, ist es ebenfalls bevorzugt, daß die Gewebe- oder Ge¬ flechtschichten aus Fasermaterial auf eine innen- oder Außenhaut des Luft¬ sackes aufgenaht sind Speziell geformte Fasermaterialien können als Flammschutz oder als Filterelemente an besonders wichtigen Bereichen des Luftsackes angebracht werden.In order to avoid damage to the airbag and thus injuries to the vehicle occupants, it is also preferred that the fabric or braid layers of fiber material are sewn onto an inner or outer skin of the airbag. Specially shaped fiber materials can be used as flame protection or as filter elements be attached to particularly important areas of the airbag.
Bei anderen Ausführungsformen sind die Gewebe- oder Geflechtschichten auf Entluftungsoffnungen (Ventholes) des Luftsackes angeordnet. Durch die Einstellung der Maschenweite und Materialdicke der Gewebe- oder Geflecht- schichten lassen sich die Entluftungsoffnungen durch Gewebe- oder Ge¬ flechtschichten derart abdecken, daß einerseits das Gas aus dem Luftsack wieder entweichen kann und ein weiches Auffangen des Fahrzeuginsassen gewährleistet ist und andererseits heiße Gaspartikel zurückgehalten werden.In other embodiments, the fabric or braid layers are arranged on ventholes of the airbag. By adjusting the mesh size and material thickness of the fabric or braid layers, the ventilation openings can be covered by fabric or braid layers in such a way that on the one hand the gas can escape from the airbag and a soft collection of the vehicle occupant is ensured and on the other hand hot gas particles be held back.
wenn Bander aus Fasermaterial als Filterelemente an Metallwandungen der Filterkammer des Gasstromfilters angebracht sind, laßt sich die Wirkungs¬ weise und Temperaturbeständigkeit des Gasstromfilters erhohen und gleichzeitig das Gewicht des Gasstromfilters reduzieren, ES wäre auch denk¬ bar, konventionelle Gasstromfilter aus Metall mit erfindungsgemaßen Gas- stromfiltern aus Fasermaterial zu kombinieren, indem geeignete abgelangte Bander aus Fasermaterial an den Metallwandungen eingeklebt oder auf an¬ dere weise fixiert werden.If bands of fiber material are attached as filter elements to metal walls of the filter chamber of the gas flow filter, the effectiveness and temperature resistance of the gas flow filter can be increased and at the same time the weight of the gas flow filter can be reduced. It would also be conceivable to use conventional gas flow filters made of metal with gas flow filters according to the invention of fiber material to be combined by gluing suitable strips of fiber material which have been cut to length to the metal walls or being fixed in some other way.
Besonders bevorzugt ist es, daß die Fasern aus Metalloxiden bestehen. Der- artige Fasern weisen ein besonders gutes Adsorptions- und katalytisches verhalten auf, so daß heiße Partikel des durch den Gasgenerator erzeugten Gasstromes gefiltert bzw. zurückgehalten werden.It is particularly preferred that the fibers consist of metal oxides. Such fibers have a particularly good adsorption and catalytic behavior, so that hot particles of the gas stream generated by the gas generator are filtered or retained.
vorteilhafterweise lassen sich die Fasern aus Al203 fertigen, die aufgrund ih- rer hohen spezifischen Oberflachenenergie ein gutes Adsorptionsvermo- gen, gute katalytisehe Eigenschaften und eine hohe mechanische Formbe¬ ständigkeit bei hohen Temperaturen besitzen.The fibers can advantageously be made from Al 2 0 3 , which due to their high specific surface energy has a good adsorption capacity. possess good catalytic properties and high mechanical dimensional stability at high temperatures.
Bei einer weiteren Ausführungsform sind die Fasern aus Si02 gefertigt. Dies hat den vorteil, daß für die Herstellung der Gewebe- oder Geflechtschichten des erfindungsgemäßen Airbagsystems eines der in der Natur am häufigsten vorkommenden anorganischen Oxide verwendet werden kann. Siθ2 gehört zur Gruppe vernetzter amorpher Festkörper und kann durch die Zugabe verschiedener additiver Oxide, wie beispielsweise Na20, mit unterschiedlich¬ sten Netzwerkstrukturen ausgebildet werden, so daß optimale Fasern für den Einsatz in Airbagsysteme geschaffen werden können.In a further embodiment, the fibers are made from Si0 2 . This has the advantage that one of the most frequently occurring inorganic oxides in nature can be used for the production of the fabric or braid layers of the airbag system according to the invention. SiO 2 belongs to the group of cross-linked amorphous solids and can be formed with the most varied network structures by adding various additive oxides, such as Na 2 O, so that optimal fibers can be created for use in airbag systems.
Bei einer weiteren Variante sind die Fasern aus B2Oj gefertigt, das aufgrund seiner Molekülstruktur mit einer teilweise ionischen und teilweise kovalen- ten Bindung ebenfalls bevorzugte Adsorptions- und Katalysatoreigenschaf- ten aufweist.In a further variant, the fibers are made from B 2 Oj, which due to its molecular structure with a partially ionic and partially covalent bond also has preferred adsorption and catalyst properties.
Ebenfalls ist es vorteilhaft, daß die Fasern eine Temperaturbelastbarkeit über 1000 °c ohne wesentliche Beeinträchtigung ihrer mechanischen Eigen¬ schaften sowie einen Schmelzpunkt über 1600 °c aufweisen. Dies ist ins- besondere dann wichtig, wenn die Gewebe- oder Geflechtschichten aus an¬ organischen oder keramischen Fasern als Gasstromfilter ausgebildet sind und dort eingesetzt werden, wo die heißeste Temperatur des Gasstromes vorliegt, nämlich direkt an der Austrittsoffnung der Brennkammer.It is also advantageous that the fibers have a temperature resistance above 1000 ° C without significantly affecting their mechanical properties and a melting point above 1600 ° C. This is particularly important if the woven or braided layers made of inorganic or ceramic fibers are designed as gas flow filters and are used where the hottest temperature of the gas flow is present, namely directly at the outlet opening of the combustion chamber.
Es versteht sich von selbst, daß die Fasern aus unterschiedlichen Fasermate¬ rialien auch zu einem Faserverbund miteinander kombiniert werden kön¬ nen.It goes without saying that the fibers from different fiber materials can also be combined to form a fiber composite.
weitere Vorteile der Erfindung ergeben sich aus der Beschreibung und der Zeichnung. Ebenso können die vorstehend genannten und die noch weiter aufgeführten Merkmale erfindungsgemäß jeweils einzeln für sich oder zu mehreren in beliebigen Kombinationen Verwendung finden. Die gezeigten und beschriebenen Ausführungsformen sind nicht als abschließende Aufzäh¬ lung zu verstehen, sondern haben vielmehr beispielhaften Charakter für die Schilderung der Erfindung. Es zeigenFurther advantages of the invention result from the description and the drawing. Likewise, the features mentioned above and those listed further can be used according to the invention individually or in combination in any combination. The embodiments shown and described are not to be understood as an exhaustive list, but rather have an exemplary character for the description of the invention. Show it
Fig 1 eine schematische perspektivische Darstellung eines Luftsackes des erfindungsgemaßen Airbagsystems, bei dem Gewebe- oder Geflecht- schichten aus Fasermaterial im Bereich eines Sackmundes des Luft- sackes angebracht sind, und1 shows a schematic perspective illustration of an airbag of the airbag system according to the invention, in which woven or braided layers of fiber material are attached in the region of a mouth of the airbag, and
Fig 2 eine schematische perspektivische Darstellung eines weiteren Luft¬ sackes des erfindungsgemaßen Airbagsystems, bei dem Gewebe¬ oder Geflechtschichten aus Fasermaterial auf Entluftungsoffnungen (Ventholes) des Luftsackes angeordnet sind2 shows a schematic perspective illustration of a further airbag of the airbag system according to the invention, in which fabric or braid layers made of fiber material are arranged on vent holes of the airbag
Die einzelnen Figuren in der Zeichnung zeigen den erfindungsgemaßen Ge¬ genstand teilweise stark schematisiert und sind nicht maßstäblich zu verste¬ henThe individual figures in the drawing show the object according to the invention in a highly schematic manner and cannot be understood to scale
Figur 1 zeigt eine perspektivische Darstellung eines Luftsackes 10 eines erfin¬ dungsgemaßen Airbagsystems im entfalteten, aufgeblasenen zustand Über eine Sackoff nung 11 ist ein in einem Gasgenerator erzeugtes Gas in den Luftsack 10 eingedrungen, da ein Sackmund 12 des Luftsackes 10 mit einer Öffnung des Gasgenerators verbunden ist Der Gasgenerator ist in der Figur nicht gezeigt Das Gas weist eine hohe Temperatur auf, so daß der sack- mund 12 und umliegende Randbereiche des Sackmundes 12 ebenfalls hohen Temperaturen und heißen Partikeln ausgesetzt sind Gewebeschichten 13 aus einem anorganischen Fasermaterial sind im Bereich des Sackmundes 12 angebracht und dienen als Flammschutzlage. Gegebenenfalls können auch mehrere Lagen der Gewebeschicht 13 vorgesehen sein, um den Bereich um den Sackmund 12 auch bei hohen Temperaturen vor einem schmelzen oder verkoken zu schützenFIG. 1 shows a perspective view of an airbag 10 of an airbag system according to the invention in the unfolded, inflated state. A gas generated in a gas generator has penetrated into the airbag 10 via a bag opening 11, since a bag mouth 12 of the airbag 10 is connected to an opening of the gas generator The gas generator is not shown in the figure. The gas is at a high temperature, so that the bag mouth 12 and surrounding edge areas of the bag mouth 12 are also exposed to high temperatures and hot particles. Tissue layers 13 made of an inorganic fiber material are in the area of the bag mouth 12 attached and serve as a flame retardant layer. If necessary, several layers of the fabric layer 13 can also be provided in order to protect the area around the bag mouth 12 from melting or coking even at high temperatures
Figur 2 zeigt eine perspektivische Darstellung eines Luftsackes 20 eines wei¬ teren erfindungsgemaßen Airbagsystems, in den über eine sackoffnung 21 ein heißes Gas eingedrungen ist, so daß der Luftsack 20 in der Figur 2 im auf¬ geblasenen, entfalteten zustand dargestellt ist Der Luftsack 20 ist über ei¬ nen Sackmund 22 mit einem Gasgenerator zur Erzeugung des heißen Gas- Stromes verbunden, der in der Figur nicht dargestellt ist Der Luftsack 20 weist eine Entlüftungsöffnung 23 auf, die auch als venthole bezeichnet wird. Aus der Entlüftungsöffnung 23 kann das Gas nach der Sackentfaltung wieder entweichen und gewährleisten, daß der auf den Luftsack 20 aufpral¬ lende Fahrzeuginsasse weich aufgefangen wird. Damit der heiße Gasstrom oder heiße Partikel den aufprallenden Fahrzeuginsassen nicht schädigen können, ist über der Entlüftungsöffnung 23 eine Gewebeschicht 24 aus ei¬ nem anorganischen Fasermaterial angebracht. Es können auch mehrere Ent¬ lüftungsöffnungen 23 vorgesehen sein, die unterschiedlich groß ausgebildet und mit unterschiedlich vielen Lagen der Gewebeschicht 24 abgedeckt sind. Die Gewebeschicht 24 ist auf den Luftsack 20 aufgenäht und dient einerseits als Gasstromfilter für das austretende Gas und andererseits als Flammschutzlage. FIG. 2 shows a perspective illustration of an airbag 20 of a further airbag system according to the invention, into which a hot gas has penetrated through a bag opening 21, so that the airbag 20 is shown in FIG. 2 in the inflated, unfolded state. The airbag 20 is Connected via a bag mouth 22 to a gas generator for generating the hot gas stream, which is not shown in the figure. The air bag 20 has a vent opening 23, which is also referred to as a venthole. The gas can escape again from the ventilation opening 23 after the bag has been deployed and ensure that the vehicle occupant bouncing onto the air bag 20 is captured softly. So that the hot gas flow or hot particles cannot damage the impacting vehicle occupant, a fabric layer 24 made of an inorganic fiber material is attached over the ventilation opening 23. A plurality of ventilation openings 23 can also be provided, which are of different sizes and are covered with different layers of the fabric layer 24. The fabric layer 24 is sewn onto the airbag 20 and serves on the one hand as a gas flow filter for the escaping gas and on the other hand as a flame retardant layer.

Claims

Patentansprücheclaims
1 Airbagsystem zum Abbau der kinetischen Energie eines Fahrzeugmsassen bei einem Fahrzeugunfall mit starker, negativer Beschleunigung, bei dem ein Luftsack no, 20) durch ein in einer Brennkammer erzeugtes Gas aufblas- bar ist, das vor dem Austritt aus der Brennkammer durch einen Gasstromfil¬ ter gereinigt wird, dadurch gekennzeichnet, daß zumindest Teilbereiche des Luftsackes (10, 20) eine oder mehrere Lagen von Gewebe- oder Geflecht- schichten (13, 24) aufweisen, die aus einzelnen, miteinander verbundenen Fasern aus einem anorganischen, vorzugsweise keramischen Fasermaterial zusammengesetzt sind1 airbag system for reducing the kinetic energy of a vehicle mass in a vehicle accident with strong, negative acceleration, in which an airbag no, 20) can be inflated by a gas generated in a combustion chamber and, before exiting the combustion chamber, by a gas flow filter is cleaned, characterized in that at least partial areas of the airbag (10, 20) have one or more layers of woven or braided layers (13, 24) which are composed of individual, interconnected fibers of an inorganic, preferably ceramic, fiber material
2 Airbagsystem nach Anspruch 1, dadurch gekennzeichnet, daß die Gewe¬ be- oder Geflechtschichten (13, 24) aus Fasermaterial im Bereich eines sack- mundes (22) des Luftsackes (20) angebracht sind2 airbag system according to claim 1, characterized in that the Gewe¬ loading or braid layers (13, 24) made of fiber material in the region of a sack mouth (22) of the airbag (20) are attached
3 Airbagsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Gewebe- oder Geflechtschichten (13, 24) aus Fasermaterial auf eine innen- oder Außenhaut des Luftsackes (10, 20) aufgenaht sind3 airbag system according to claim 1 or 2, characterized in that the fabric or braid layers (13, 24) made of fiber material on an inner or outer skin of the airbag (10, 20) are sewn
4 Airbagsystem nach einem der vorhergehenden Ansprüche, dadurch ge¬ kennzeichnet, daß die Gewebe- oder Geflechtschichten (24) auf Entluftungs¬ offnungen (23) (Ventholes) des Luftsackes (20) angeordnet sind4 airbag system according to one of the preceding claims, characterized ge indicates that the fabric or braid layers (24) on Entluftungs¬ openings (23) (vent holes) of the airbag (20) are arranged
5 Airbagsystem nach einem der vorhergehenden Ansprüche, dadurch ge- kennzeichnet, daß Bander aus Fasermaterial als Filterelemente an Metall¬ wandungen der Filterkammer des Gasstromf ilters angebracht sind5 Airbag system according to one of the preceding claims, characterized in that bands of fiber material are attached as filter elements to the metal walls of the filter chamber of the gas flow filter
6 Airbagsystem nach einem der vorhergehenden Ansprüche, dadurch ge¬ kennzeichnet, daß die Fasern aus Metalloxiden bestehen6 Airbag system according to one of the preceding claims, characterized ge indicates that the fibers consist of metal oxides
7 Airbagsystem nach Anspruch 6, dadurch gekennzeichnet, daß die Fasern aus AI2Oj gefertigt sind 8 Airbagsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeich¬ net, daß die Fasern aus Sι02 gefertigt sind7 airbag system according to claim 6, characterized in that the fibers are made of AI 2 Oj 8 airbag system according to one of claims 1 to 5, characterized gekennzeich¬ net that the fibers are made of Sι0 2
9 Airbagsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeich¬ net, daß die Fasern aus B203 gefertigt sind9 airbag system according to one of claims 1 to 5, characterized gekennzeich¬ net that the fibers are made of B 2 0 3
10 Airbagsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeich¬ net, daß die Fasern aus einer Kombination aus Al20j, Sι02 und B2o3 gefertigt10 airbag system according to one of claims 1 to 5, characterized gekennzeich¬ net that the fibers made of a combination of Al 2 0j, Sι0 2 and B 2 o 3
11 Airbagsystem nach einem der vorhergehenden Ansprüche, dadurch ge¬ kennzeichnet, daß die Fasern eine Temperaturbelastbarkeit über 1000 °c ohne wesentliche Beeinträchtigung ihrer mechanischen Eigenschaften so¬ wie einen Schmelzpunkt über 1600 °c aufweisen 11 Airbag system according to one of the preceding claims, characterized ge indicates that the fibers have a temperature resistance above 1000 ° c without significant impairment of their mechanical properties and a melting point above 1600 ° c
PCT/EP1996/003743 1995-09-16 1996-08-24 Air bag system WO1997010125A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19534483.9 1995-09-16
DE1995134483 DE19534483A1 (en) 1995-09-16 1995-09-16 Airbag system

Publications (1)

Publication Number Publication Date
WO1997010125A1 true WO1997010125A1 (en) 1997-03-20

Family

ID=7772418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003743 WO1997010125A1 (en) 1995-09-16 1996-08-24 Air bag system

Country Status (2)

Country Link
DE (1) DE19534483A1 (en)
WO (1) WO1997010125A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2386870B (en) * 2002-03-27 2005-03-16 Autoliv Dev Improvements in or relating to an air-bag
DE10337958A1 (en) * 2003-02-04 2004-08-12 Dynamit Nobel Ais Gmbh Automotive Ignition Systems Pyromechanical separation element, e.g. for interrupting current feeds in on-board electrical systems in accidents, has chisel that cuts conductor constriction forming bent tongue and clamps tongue
DE102005015078A1 (en) * 2005-04-01 2006-10-05 Trw Automotive Gmbh Vehicle restraint system`s gas bag e.g. driver gas bag, has wall section comprising textile layer that is attached at carrier fabric and temperature-resistant as fabric, where fabric and layer represent surface interconnection
DE202005008147U1 (en) * 2005-05-24 2005-09-15 Trw Automotive Safety Sys Gmbh Air bag for vehicle restraint systems has heat protection device formed by a flame-retardant adhesive which connects one layer of uncoated fabric to the uncoated fabric of the bag wall
DE102008046264B4 (en) * 2008-09-08 2014-01-09 Autoliv Development Ab airbag
DE102020104121A1 (en) 2020-02-18 2021-08-19 Zf Airbag Germany Gmbh GAS GENERATOR

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044716A1 (en) * 1980-07-18 1982-01-27 M. H. Detrick Co., Limited Ceramic fibre composite and method of making it
JPS6470247A (en) * 1987-09-11 1989-03-15 Asahi Chemical Ind Base cloth for air bag
WO1990009295A2 (en) * 1989-02-16 1990-08-23 Airbags International Limited Air bag
EP0424617A2 (en) * 1989-10-21 1991-05-02 Erlus Baustoffwerke Smoke tube for a chimney made of several sections
JPH04201647A (en) * 1990-11-29 1992-07-22 Toray Ind Inc Air bag
JPH0578946A (en) * 1991-09-13 1993-03-30 Asahi Chem Ind Co Ltd Air bag made of hollow weave
EP0575038A1 (en) * 1992-04-28 1993-12-22 Matsushita Electric Industrial Co., Ltd. Exhaust gas filter and method for making the same
JPH07285413A (en) * 1994-04-18 1995-10-31 Nippon Reinz Co Ltd Filter for inflator in air bag system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2364534A1 (en) * 1972-12-26 1974-08-01 Nissan Motor MEANS FOR COOLING AND FILTERING GASES AND ITS USE
JPS5127243A (en) * 1974-08-30 1976-03-06 Nissan Motor
US4017100A (en) * 1975-01-08 1977-04-12 Eaton Corporation Fluid supply, filter pack used therein and method of assembly
US4111458A (en) * 1975-11-20 1978-09-05 Honda Giken Kogyo Kabushiki Kaisha Safety air cushion bag in automotive vehicles
US4243715A (en) * 1979-04-27 1981-01-06 Aerodyne Development Corporation Metallized amorphous silica fabric for high temperature use
US4543113A (en) * 1984-08-10 1985-09-24 Minnesota Mining And Manufacturing Company Uniform minimum-permeability woven fabric, filter, and process therefor
DE3644554C1 (en) * 1986-12-24 1988-04-21 Daimler Benz Ag Gas cushion impact protection device for the occupants of a motor vehicle with a filter for cleaning the propellant gas
DE69105179T2 (en) * 1990-09-06 1995-06-22 Nippon Oils & Fats Co Ltd Gas generator device.
US5087070A (en) * 1990-12-18 1992-02-11 Trw Inc. Method of assembling an inflator for a vehicle occupant restraint
DE4121659C2 (en) * 1991-06-29 1996-05-02 Daimler Benz Ag Impact protection device for vehicle occupants
DE4135299C2 (en) * 1991-10-25 1998-12-24 Temic Bayern Chem Airbag Gmbh Gas generator
US5230726A (en) * 1992-04-30 1993-07-27 Morton International, Inc. Spiral wrapped gas generator filter
US5404716A (en) * 1994-02-24 1995-04-11 Caterpillar Inc. Internally insulated gas manifold
US5492362A (en) * 1994-03-11 1996-02-20 Breed Automotive Technology, Inc. Airbag with controlled venting

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044716A1 (en) * 1980-07-18 1982-01-27 M. H. Detrick Co., Limited Ceramic fibre composite and method of making it
JPS6470247A (en) * 1987-09-11 1989-03-15 Asahi Chemical Ind Base cloth for air bag
WO1990009295A2 (en) * 1989-02-16 1990-08-23 Airbags International Limited Air bag
EP0424617A2 (en) * 1989-10-21 1991-05-02 Erlus Baustoffwerke Smoke tube for a chimney made of several sections
JPH04201647A (en) * 1990-11-29 1992-07-22 Toray Ind Inc Air bag
JPH0578946A (en) * 1991-09-13 1993-03-30 Asahi Chem Ind Co Ltd Air bag made of hollow weave
EP0575038A1 (en) * 1992-04-28 1993-12-22 Matsushita Electric Industrial Co., Ltd. Exhaust gas filter and method for making the same
JPH07285413A (en) * 1994-04-18 1995-10-31 Nippon Reinz Co Ltd Filter for inflator in air bag system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 267 (M - 840) 20 June 1989 (1989-06-20) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 538 (M - 1335) 9 November 1992 (1992-11-09) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 409 (C - 1091) 30 July 1993 (1993-07-30) *
PATENT ABSTRACTS OF JAPAN vol. 95, no. 010 *

Also Published As

Publication number Publication date
DE19534483A1 (en) 1997-03-20

Similar Documents

Publication Publication Date Title
DE3644554C1 (en) Gas cushion impact protection device for the occupants of a motor vehicle with a filter for cleaning the propellant gas
US5702494A (en) Airbag filter assembly and method of assembly thereof
DE69020285T2 (en) Shock absorbing device for the occupants of a motor vehicle and their use.
EP0442373B1 (en) Web for airbags
DE19581485B3 (en) Air-Bag
DE3900931C2 (en) Passive restraint system
DE2317032A1 (en) PARTICLE SCREEN FOR PYROTECHNICAL SYSTEM
EP2283901B1 (en) Filter material and respirator mask
DE3840571A1 (en) GAS GENERATOR MATERIAL
DE4126527A1 (en) GAS GENERATOR FOR AN AIRBAG
DE102008037811A1 (en) Restraint system with closable air flow openings
DE3733436A1 (en) INFLATABLE RESTRAINT SYSTEM
EP0033784A2 (en) Multilayered gas filter
DE4135657A1 (en) FILTER ARRANGEMENT FOR A AIR CUSHION INFLATING DEVICE
DE4009611A1 (en) Vehicle air bag fabric of low gas permeability - woven from mixt. yarns of thermal resistant aramid and thermally malleable fibres
DE102006043552B4 (en) Airbag for an airbag module of a motor vehicle
WO1997010125A1 (en) Air bag system
WO2002085426A2 (en) Respiratory air filter
DE102018002343A1 (en) Half-mask respirator
DE19617249C2 (en) Gas generator
DE10230140A1 (en) Airbag module
DE112008003152B4 (en) Metal fiber filter for cleaning exhaust gas with a slot-like diversion part
DE4116882A1 (en) Installing gas generating module in airbag - using coated sheet of azide, nitrate and elastic binder enclosed in metal and non-metal mesh to enhance safety
DE19612581A1 (en) Gas and vapour generator especially for airbag
EP3908485B1 (en) Gas generator, module and vehicle safety system

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

WA Withdrawal of international application
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