WO1998010963A1 - Airbag system with a plurality of airbags and only one gas generator - Google Patents

Airbag system with a plurality of airbags and only one gas generator Download PDF

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Publication number
WO1998010963A1
WO1998010963A1 PCT/EP1997/004607 EP9704607W WO9810963A1 WO 1998010963 A1 WO1998010963 A1 WO 1998010963A1 EP 9704607 W EP9704607 W EP 9704607W WO 9810963 A1 WO9810963 A1 WO 9810963A1
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WO
WIPO (PCT)
Prior art keywords
airbag
gas
gas generator
unit
airbags
Prior art date
Application number
PCT/EP1997/004607
Other languages
German (de)
French (fr)
Inventor
Ulrich Kippelt
Original Assignee
Pars Passive Rückhaltesysteme 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 Pars Passive Rückhaltesysteme Gmbh filed Critical Pars Passive Rückhaltesysteme Gmbh
Publication of WO1998010963A1 publication Critical patent/WO1998010963A1/en

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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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • 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
    • B60R2021/0002—Type of accident
    • B60R2021/0006—Lateral collision
    • 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
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01034—Controlling a plurality of restraint devices
    • 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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • B60R2021/2615—Gas guiding means, e.g. ducts for diverting the gas into a plurality of bags

Definitions

  • Airbag system with several airbags and only one gas generator
  • the present invention relates to an airbag system with at least two airbags.
  • a common element today for passive impact protection for a person sitting on a vehicle seat of a vehicle is one or more airbags or gas bags.
  • An airbag system comprising two airbags is known, for example, from EP 0 565 501 A1, which in one embodiment consists of an airbag assigned to the thoracic region of a person sitting on the vehicle seat and an airbag assigned to the head region.
  • a gas generator is separately assigned to each airbag, which, in response to a respective trigger signal, suddenly directs gas into the airbag assigned to it.
  • an airbag system with at least two airbag units each having an airbag in such a way that the apparatus structure and the assembly effort are significantly reduced compared to the previous systems with at least two airbags, so that the system increased in Motor vehicles can be used, and this also in motor vehicles below the upper middle class.
  • the airbag system according to the invention which has at least two airbag units each having an airbag and a gas generator, the at least two airbags and the gas generator being fluidically connected to one another by means of gas pressure lines and forming an independently manageable assembly unit.
  • the expenditure on equipment of this system compared to conventional systems is reduced by using only at least one gas generator.
  • the assembly effort is reduced in that the at least two air bags are connected to one another with a gas pressure line.
  • the gas pressure line is preferably a rigid line, so that the airbag system can be delivered pre-assembled for any type of vehicle and can then be installed as a unit in the motor vehicle. Extensive adjustment work, etc. eliminated with this system.
  • the fitter only needs to place and anchor the unit in corresponding recesses, for example in the back of the motor vehicle.
  • the cost of the system is significantly lower than that of the conventional systems due to the low expenditure on equipment and the easier assembly.
  • the passenger cell for example in the thorax and head area of a vehicle occupant, responds differently in time to a side impact of another vehicle due to the structure of the other vehicle penetrating into the passenger cell.
  • the space in the thorax area is pushed together faster than in the head area due to the bumper of the other vehicle, which usually pushes first into the passenger cell, so that the airbag, for example for the thorax area, must be inflated to full size after a short time, whereas it is sufficient for the head area if the head airbag is inflated to full size a little later in order to perform a damping function.
  • these time conditions for filling the air bags with gas are achieved in that the flow resistances of the gas pressure lines are preset accordingly. How the system reacts after the gas generator has been ignited is already specified on the ready-to-install unit by selecting the appropriate flow diameter. For example, the flow resistance of a gas pressure line between an airbag assigned to the head region and an airbag assigned to the thorax region will be preset such that the thorax airbag is initially filled with gas, whereas the head airbag is inflated with a certain time delay.
  • the time requirements can be standardized and determined solely by the concrete design of the unit.
  • the airbag system according to the invention can also advantageously be designed in such a way that at least one of the at least two airbags has two chambers which are fluidically connected to one another.
  • the one airbag has a chamber which is assigned to the head region of the motor vehicle occupant and a further chamber which is assigned to the thorax region of the person.
  • the second separate airbag could, for example, be assigned to the interior of the vehicle in order to avoid interaction between the driver and the front passenger.
  • a pressure line would run from the gas generator to the two-chamber airbag and a pressure line to an interaction airbag or - if the gas generator is directly assigned to an airbag - only one pressure line to the other airbag.
  • FIG. 1 is a schematic section through a motor vehicle from the front, showing a person sitting on a seat,
  • Fig. 2 shows the view of Fig. 1 from the right
  • Fig. 3 shows schematically the airbag unit according to the invention.
  • the airbag system 1 shows a person sitting on a motor vehicle seat 2.
  • the airbag system 1 is integrated into the seat 2.
  • it consists of two airbag units 6 and 7.
  • the airbag unit 6 is assigned to the head area of the person 3 and the airbag unit 7 to the thorax area of the person.
  • the system therefore predominantly has two air bags, to which, however, only one gas generator 4 is assigned, which should suddenly fill them with gas in response to a request signal.
  • the gas generator is arranged directly on the thorax airbag unit 7, so that only one pressure line 5 is required here to establish the connection between the gas generator 4 and the airbag unit 6.
  • FIG. 3 illustrates the assembly-friendly, manageable unit of the airbag system 1.
  • a rigid gas pressure line 5 between the airbag units 6 and 7 the position of both airbag units can be preset by the manufacturer. The unit can then be easily inserted into appropriately designed motor vehicle seats 2 with corresponding recesses and fixed there.

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

Abstract

The invention concerns an airbag system (1) which comprises at least two airbag units (6, 7) which each have an airbag arranged so as to protect different body regions of a person (3) sitting in the motor vehicle seat (2) with which the system is associated, and at least one gas generator (4) which guides gas abruptly into the airbags in response to a request signal. The at least two airbags and the gas generator (4) are interconnected hydraulically by means of gas pressure lines (5) and form an assembly unit which can be handled independently.

Description

Airbagsystem mit mehreren Luftsäcken und nur einem Gasgenerator Airbag system with several airbags and only one gas generator
Die vorliegende Erfindung betrifft ein Airbagsystem mit mindestens zwei Luftsäcken.The present invention relates to an airbag system with at least two airbags.
Ein heute übliches Element für den passiven Aufprallschutz für eine auf einem Fahrzeugsitz eines Fahrzeugs sitzenden Person ist ein oder mehrere Airbags oder Gassäcke. Ein zwei Luftsäcke umfassendes Airbagsystem ist beispielsweise bekannt aus der EP 0 565 501 AI, welches in einer Ausfuhrungsform aus einem dem Thoraxbereich einer auf dem Fahrzeugsitz sitzenden Person zugeordneten Airbag und einem dem Kopfbereich zugeordneten Airbag besteht. Jedem Airbag ist separat ein Gasgenerator zugeordnet, der auf ein jeweiliges Auslösesignal hin schlagartig Gas in den ihm zugeordneten Airbag leitet.A common element today for passive impact protection for a person sitting on a vehicle seat of a vehicle is one or more airbags or gas bags. An airbag system comprising two airbags is known, for example, from EP 0 565 501 A1, which in one embodiment consists of an airbag assigned to the thoracic region of a person sitting on the vehicle seat and an airbag assigned to the head region. A gas generator is separately assigned to each airbag, which, in response to a respective trigger signal, suddenly directs gas into the airbag assigned to it.
Der mit diesem bekannten System zu betreibende apparative Aufbau sowie der Montageaufwand ist relativ hoch. Die dadurch entstehenden Kosten tragen ihren Teil dazu bei, daß Airbagsysteme, die beispielsweise über einen den Kopfbereich des Fahrzeuginsassen sowie den Thoraxbereich schützenden, weiteren Airbag verfugen, noch nicht sehr verbreitet sind und im wesentlichen nur in Automobilen ab der oberen Mittelklasse anzutreffen sind.The apparatus structure to be operated with this known system and the assembly effort are relatively high. The resulting costs contribute to the fact that airbag systems, which have, for example, a further airbag protecting the head area of the vehicle occupant and the thorax area, are not yet very widespread and are essentially only found in automobiles from the upper middle class.
Vor diesem Hintergrund ist es nun die Aufgabe der vorliegenden Erfindung, ein Airbagsystem mit wenigstens zwei jeweils einen Luftsack aufweisenden Airbageinheiten so weiter zu entwickeln, daß der apparative Aufbau und der Montageaufwand gegenüber den bisherigen Systemen mit wenigstens zwei Luftsäcken deutlich reduziert wird, so daß das System vermehrt in Kraftfahrzeugen zum Einsatz kommen kann, und dies auch in Kraftfahrzeugen unterhalb der oberen Mittelklasse.Against this background, it is the object of the present invention to further develop an airbag system with at least two airbag units each having an airbag in such a way that the apparatus structure and the assembly effort are significantly reduced compared to the previous systems with at least two airbags, so that the system increased in Motor vehicles can be used, and this also in motor vehicles below the upper middle class.
Gelöst wird diese Aufgabe durch das erfindungsgemäße Airbagsystem, das wenigstens zwei jeweils einen Luftsack aufweisende Airbageinheiten und einen Gasgenerator aufweist, wobei die wenigstens zwei Luftsäcke und der Gasgenerator mittels Gasdruckleitungen strömungstechnisch miteinander verbunden sind und eine selbständig handhabbare Montageeinheit bilden.This object is achieved by the airbag system according to the invention, which has at least two airbag units each having an airbag and a gas generator, the at least two airbags and the gas generator being fluidically connected to one another by means of gas pressure lines and forming an independently manageable assembly unit.
Der apparative Aufwand dieses Systems gegenüber herkömmlichen Systemen wird durch die Verwendung von nur wenigstens einem Gasgenerator reduziert. Stets ist bei dem erfindungsgemäßen System wenigstens ein Gasgenerator weniger vorhanden als Luftsäcke. Der Montageaufwand wird dadurch reduziert, daß die wenigstens zwei Luftsäcke untereinander mit einer Gasdruckleitung verbunden sind. Vorzugsweise ist die Gasdruckleitung eine starre Leitung, so daß das Airbagsystem für jeden beliebigen Fahrzeugtyp vormontiert ausgeliefert und als Einheit dann in das Kraftfahrzeug eingebaut werden kann. Aufwendige Justierarbeiten o.a. entfallen mit diesem System. Der Monteur braucht nur die Einheit in entsprechende Aussparungen, beispielsweise in der Kraftfahrzeuglehne, zu setzen und zu verankern. Die Kosten des Systems liegen aufgrund des apparativen Minderaufwands und der einfacheren Montage deutlich unterhalb jener der herkömmlichen Systeme.The expenditure on equipment of this system compared to conventional systems is reduced by using only at least one gas generator. In the system according to the invention there is always at least one gas generator less than air bags. The assembly effort is reduced in that the at least two air bags are connected to one another with a gas pressure line. The gas pressure line is preferably a rigid line, so that the airbag system can be delivered pre-assembled for any type of vehicle and can then be installed as a unit in the motor vehicle. Extensive adjustment work, etc. eliminated with this system. The fitter only needs to place and anchor the unit in corresponding recesses, for example in the back of the motor vehicle. The cost of the system is significantly lower than that of the conventional systems due to the low expenditure on equipment and the easier assembly.
Es ist bekannt, daß die Fahrgastzelle, beispielsweise im Thorax- und Kopfbereich eines Fahrzeuginsassen bei einem Seitenaufprall eines anderen Fahrzeugs zeitlich unterschiedlich reagieren aufgrund der in die Fahrgastzelle eindringenden Struktur des anderen Fahrzeuges. So ist der Raum im Thoraxbereich aufgrund der meist zuerst in die Fahrgastzelle drängenden Stoßstange des anderen Fahrzeuges schneller zusammengedrängt als im Kopfbereich, so daß entsprechend der Airbag, beispielsweise für den Thoraxbereich nach kurzer Zeit auf die volle Größe aufgeblasen sein muß, wohingegen es für den Kopfbereich genügt, wenn der Kopfairbag etwas später auf volle Größe aufgeblasen ist, um eine dämpfende Funktion auszuüben. Diese zeitlichen Bedingungen der Befüllung der Luftsäcke mit Gas werden gemäß einer bevorzugten Weiterbildung des erfindungsgemäßen Airbagsystems dadurch erreicht, daß die Strömungswiderstände der Gasdruckleitungen entsprechend voreingestellt sind. Es ist bereits an der montagefertigen Einheit durch die Wahl der entsprechenden Strömungsdurchmesser vorgegeben, wie das System nach Zündung des Gasgenerators reagiert. So wird beispielsweise der Strömungswiderstand einer Gasdruckleitung zwischen einem dem Kopfbereich zugeordneten Luftsack und einem dem Thoraxbereich zugeordneten Luftsack so voreingestellt sein, daß zunächst der Thorax-Luftsack mit Gas gefüllt wird, wohingegen der Kopf-Airbag mit einer gewissen zeitlichen Verzögerung aufgeblasen wird. Die zeitlichen Vorgaben sind standardisierbar und allein durch die konkrete konstruktive Ausgestaltung der Einheit festlegbar.It is known that the passenger cell, for example in the thorax and head area of a vehicle occupant, responds differently in time to a side impact of another vehicle due to the structure of the other vehicle penetrating into the passenger cell. Thus, the space in the thorax area is pushed together faster than in the head area due to the bumper of the other vehicle, which usually pushes first into the passenger cell, so that the airbag, for example for the thorax area, must be inflated to full size after a short time, whereas it is sufficient for the head area if the head airbag is inflated to full size a little later in order to perform a damping function. According to a preferred development of the airbag system according to the invention, these time conditions for filling the air bags with gas are achieved in that the flow resistances of the gas pressure lines are preset accordingly. How the system reacts after the gas generator has been ignited is already specified on the ready-to-install unit by selecting the appropriate flow diameter. For example, the flow resistance of a gas pressure line between an airbag assigned to the head region and an airbag assigned to the thorax region will be preset such that the thorax airbag is initially filled with gas, whereas the head airbag is inflated with a certain time delay. The time requirements can be standardized and determined solely by the concrete design of the unit.
Mit Vorteil kann das erfindungsgemäße Airbagsystem auch so ausgebildet werden, daß wenigstens einer der wenigstens zwei Luftsäcke über zwei Kammern verfugt, die untereinander strömungstechnisch in Verbindung stehen. Beispielsweise wird hierbei daran gedacht, daß der eine Luftsack eine Kammer, welche dem Kopfbereich des Kraftfahrzeuginsassen zugeordnet ist, sowie eine weitere Kammer aufweist, welche dem Thoraxbereich der Person zugeordnet ist. Der zweite separate Luftsack könnte beispielsweise dem Innenbereich des Fahrzeugs zugeordnet sein, um eine Interaktion zwischen Fahrer und Beifahrer zu vermeiden. In diesem Beispiel würde von dem Gasgenerator eine Druckleitung zu dem zweikammerigen Luftsack und eine Druckleitung zu einem Interaktionsairbag verlaufen oder - wenn der Gasgenerator einem Airbag direkt zugeordnet ist - nur eine Druckleitung hin zu dem anderen Airbag. Die Erfindung wird anhand eines Ausführungsbeispiels gemäß der Zeichnungsfiguren näher erläutert. Hierbei zeigt:The airbag system according to the invention can also advantageously be designed in such a way that at least one of the at least two airbags has two chambers which are fluidically connected to one another. For example, it is thought that the one airbag has a chamber which is assigned to the head region of the motor vehicle occupant and a further chamber which is assigned to the thorax region of the person. The second separate airbag could, for example, be assigned to the interior of the vehicle in order to avoid interaction between the driver and the front passenger. In this example, a pressure line would run from the gas generator to the two-chamber airbag and a pressure line to an interaction airbag or - if the gas generator is directly assigned to an airbag - only one pressure line to the other airbag. The invention is explained in more detail using an exemplary embodiment according to the drawing figures. Here shows:
Fig. 1 einen schematischen Schnitt durch ein Kraftfahrzeug von vorne, welcher eine auf einem Sitz sitzenden Person zeigt,1 is a schematic section through a motor vehicle from the front, showing a person sitting on a seat,
Fig. 2 die Ansicht aus Fig. 1 von rechts, undFig. 2 shows the view of Fig. 1 from the right, and
Fig. 3 schematisch die erfindungsgemäße Airbageinheit.Fig. 3 shows schematically the airbag unit according to the invention.
Fig. 1 zeigt eine auf einem Kraftfahrzeugsitz 2 sitzende Person. In den Sitz 2 integriert eingebaut ist das Airbagsystem 1. Dieses besteht vorliegend aus zwei Airbageinheiten 6 und 7. Die Airbageinheit 6 ist vorliegend dem Kopfberc ich der Person 3 und die Airbageinheit 7 dem Thoraxbereich der Person zugeordnet.1 shows a person sitting on a motor vehicle seat 2. The airbag system 1 is integrated into the seat 2. In the present case, it consists of two airbag units 6 and 7. The airbag unit 6 is assigned to the head area of the person 3 and the airbag unit 7 to the thorax area of the person.
Das System verfugt vorwiegend also über zwei Luftsäcke, denen jedoch nur ein Gasgenerator 4 zugeordnet ist, welcher sie schlagartig auf ein Aufforderungssignal hin mit Gas befüllen soll.The system therefore predominantly has two air bags, to which, however, only one gas generator 4 is assigned, which should suddenly fill them with gas in response to a request signal.
Vorliegend ist der Gasgenerator direkt an der Thorax -Airbageinheit 7 angeordnet, so daß es hier nur einer Druckleitung 5 bedarf, um die Verbindung zwischen dem Gasgenerator 4 und der Airbageinheit 6 herzustellen.In the present case, the gas generator is arranged directly on the thorax airbag unit 7, so that only one pressure line 5 is required here to establish the connection between the gas generator 4 and the airbag unit 6.
Fig. 3 veranschaulicht die montagefreundliche handhabbare Einheit des Airbagsystems 1. Bei einer starren Gasdruckleitung 5 zwischen den Airbageinheiten 6 und 7 kann die Lage beider Airbageinheiten vom Herstellerwerk her voreingestellt sein. Die Einheit kann sodann in entsprechend ausgebildete Kraftfahrzeugsitze 2 mit entsprechenden Ausnehmungen einfach eingesetzt und dort fixiert werden. 3 illustrates the assembly-friendly, manageable unit of the airbag system 1. In the case of a rigid gas pressure line 5 between the airbag units 6 and 7, the position of both airbag units can be preset by the manufacturer. The unit can then be easily inserted into appropriately designed motor vehicle seats 2 with corresponding recesses and fixed there.

Claims

Patentansprüche claims
1. Airbagsystem (1), welches wenigstens zwei jeweils einen Luftsack aufweisende Airbageinheiten (6, 7), die zum Schutz unterschiedlicher Körperregionen einer auf dem Kraftfahrzeugsitz (2), welchem das System zugeordnet ist, sitzenden Person (3) angeordnet sind, und wenigstens einen Gasgenerator (4) aufweist, der auf ein Aufforderungssignal hin schlagartig Gas in die Luftsäcke leitet, wobei die wenigstens zwei Luftsäcke und der Gasgenerator (4) mittels Gasdruckleitungen (5) strömungstechnisch miteinander verbunden sind und eine selbständig handhabbare Montageeinheit bildet.Airbag system (1), which has at least two airbag units (6, 7) each having an airbag, which are arranged to protect different body regions of a person (3) seated on the motor vehicle seat (2) to which the system is assigned, and at least has a gas generator (4) which, in response to a request signal, leads gas suddenly into the air bags, the at least two air bags and the gas generator (4) being connected to one another in terms of flow by means of gas pressure lines (5) and forming an independently manageable assembly unit.
2. Airbagsystem nach Anspruch 1, bei dem die zeitliche Abfolge der Befüllung der Luftsäcke mit Gas durch Änderung der Strömungswiderstände der Gasdruckleitungen (5) vorgebbar ist.2. Airbag system according to claim 1, wherein the time sequence of filling the air bags with gas by changing the flow resistance of the gas pressure lines (5) can be predetermined.
3. Airbagsystem nach Anspruch 2. wobei eine Airbageinheit (6) dem Kopfbereich und eine Airbageinheit (7) dem Thoraxbereich der Person (3) zugeordnet ist, bei dem die Strömungswiderstände der Gasdruckleitungen (5) so eingestellt sind, daß bei Aktivierung des Gasgenerators (4) der Luftsack der Airbageinheit (7) für den Thoraxbereich früher gefüllt ist als der Luftsack der Airbageinheit (6) für den Kopfberεich.3. Airbag system according to claim 2, wherein an airbag unit (6) is assigned to the head region and an airbag unit (7) to the thorax region of the person (3), in which the flow resistances of the gas pressure lines (5) are set such that when the gas generator is activated ( 4) the airbag of the airbag unit (7) for the thorax area is filled earlier than the airbag of the airbag unit (6) for the head area.
4. Airbagsystem nach einem der Ansprüche 1 bis 3, bei dem ein Luftsack über zwei Kammern verfugt, die untereinander strömungstechnisch miteinander in Verbindung stehen. 4. Airbag system according to one of claims 1 to 3, in which an airbag has two chambers which are fluidically connected to one another.
PCT/EP1997/004607 1996-09-16 1997-08-23 Airbag system with a plurality of airbags and only one gas generator WO1998010963A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996137603 DE19637603A1 (en) 1996-09-16 1996-09-16 Airbag system with several airbags and only one gas generator
DE19637603.3 1996-09-16

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WO1998010963A1 true WO1998010963A1 (en) 1998-03-19

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DE19704657A1 (en) * 1996-02-07 1997-08-14 Trw Vehicle Safety Systems Airbag module for protection of vehicle passengers

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