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WO2020088921A1 - Airbag device for a motor vehicle and motor vehicle equipped therewith - Google Patents

Airbag device for a motor vehicle and motor vehicle equipped therewith Download PDF

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Publication number
WO2020088921A1
WO2020088921A1 PCT/EP2019/077722 EP2019077722W WO2020088921A1 WO 2020088921 A1 WO2020088921 A1 WO 2020088921A1 EP 2019077722 W EP2019077722 W EP 2019077722W WO 2020088921 A1 WO2020088921 A1 WO 2020088921A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
gas
motor vehicle
operating state
airbag device
Prior art date
Application number
PCT/EP2019/077722
Other languages
German (de)
French (fr)
Inventor
Jürgen GIRISCH
Bernhard Schmid
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
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 Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO2020088921A1 publication Critical patent/WO2020088921A1/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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • 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
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • 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
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R2021/23107—Inflatable members characterised by their shape, construction or spatial configuration the bag being integrated in a multi-bag system
    • 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
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents

Definitions

  • the present invention relates to an airbag device for a motor vehicle according to claim 1 and to a motor vehicle equipped therewith according to claim 6.
  • a gas-emptied airbag or airbag is filled with a gas by means of a gas generator.
  • the gas-deflated state of the airbag can be regarded as a first operating state, the gas-filled state of the airbag as a second operating state.
  • the airbag is frequently supported against at least one support element located in the motor vehicle, for example an instrument panel, a headliner, a door lining or a seat element, in order to be able to assume its desired geometry.
  • the airbag device according to the invention for a motor vehicle has at least one first airbag and at least one second airbag.
  • Each of the two airbags is gas-emptied in a first operating state representing an accident-free use of the motor vehicle and gas-filled in a second operating state representing an accident situation. It is provided according to the invention to fill both air bags with gas at the same time or in succession in the event of an accident in the motor vehicle.
  • the first air bag supports the partially or completely filled second air bag and optionally holds or guides it.
  • an occupant of the motor vehicle involved in an accident can crash into the second airbag in a manner known per se, which is precisely guided by the first airbag and stabilized in its position.
  • the airbag device provides a generally dedicated and temporarily acting support means for the vehicle occupant, which takes up comparatively little space in the motor vehicle in an accident-free situation, but is designed as a gas-filled, stiffness-increasing and load-absorbing means in the event of an accident.
  • the gas required is advantageously generated by a gas generator, which can be designed as a pyrotechnic gas generator, cold gas generator or hybrid gas generator. Triggering the gas generator takes place on the basis of at least one crash sensor which is known per se and is operatively connected to an on-board electronics of the motor vehicle which are also known per se.
  • the first airbag or second airbag provided according to the invention can be formed from any suitable material.
  • This material is particularly preferably a polyamide or a polyethylene terephthalate.
  • the two air bags can advantageously be made in one piece or, if they are made in several pieces, can be connected to one another in a material, non-positive or positive manner. In particular, it is possible to weld the first airbag and the second airbag together.
  • the airbag device according to the invention is set up such that the volume of the first airbag and / or the second airbag changes in any spatial direction when the second operating state is assumed.
  • a particularly simple construction of the airbag device is advantageously achieved if the first airbag has a hose or is designed as a hose.
  • the mechanical strength of the first airbag which is in the second operating state is greater than the mechanical strength of the second airbag which is in the second operating state, as a result of which the stabilizing effect of the first airbag is advantageously further improved in favor of the second airbag.
  • the first airbag and the second airbag can each have separate gas generators or can be operatively connected to them.
  • the two airbags can be fluidly separated from one another, so that they can advantageously be filled with gas separately from one another.
  • the two air bags are fluidly connected to one another, so that the two can advantageously be filled further or better coordinated or controlled.
  • the gas channel can be operatively connected to a valve means with which the gas introduction process from the first airbag into the second airbag can be controlled even better.
  • the second airbag has at least one gas outlet means through which the gas can escape after a defined period of time from the airbag device according to the invention, which is inflated in an accident situation.
  • the gas outlet means can in particular be designed as an outlet valve and / or in the form of defined openings in the outer skin of the second airbag, through which the gas exits peu-à-peu.
  • the second airbag is designed as a head airbag, side airbag or knee airbag, so that accident-specific requirements can be taken into account in a simple manner.
  • a motor vehicle which has at least one airbag device of the type disclosed above.
  • the advantages shown apply adequately.
  • the airbag device according to the invention can be located at any suitable location in a motor vehicle, in particular on an end wall of a motor vehicle body.
  • a detailed, non-prejudicial, in particular restrictive, description of exemplary embodiments of the present invention is given below with reference to the attached figures, which are not to scale. The same elements contained therein are provided with the same reference symbols.
  • FIG. 1A is a simplified top view of a vehicle located in the front area of a motor vehicle according to the invention
  • Figure 1 B shows the arrangement shown in Figure 1A in a second
  • FIG. 2 is a simplified side view of a vehicle located in the front area of a motor vehicle according to the invention
  • FIG. 1A shows a part of a motor vehicle 1 according to the invention in plan view. Specifically, a part of a motor vehicle interior 5 is shown which has an end wall 15 forming part of a body 10, a left A-pillar 20 viewed in the main direction of travel, a right A-pillar 25 and a driver seat 30 and front passenger seat 35 which are partially shown. According to this exemplary embodiment, an instrument panel and a steering wheel are not provided in the motor vehicle, although the invention does not in any way preclude their use.
  • two airbag devices 40 and 45 are arranged on the end wall 15 arranged on the end wall 15 , spaced apart from one another and each in a first operating state, in the transverse direction Q of the motor vehicle, each comprising a gas generator 50 and 55, respectively.
  • the airbag device 40 located on the left in FIG. 1A further comprises a first airbag 40-1 and a second airbag 40-2 connected to it, while the airbag device 45 located on the right in this figure further comprises a first airbag 45-1 and a second airbag connected to it 45-2 includes. Further components of the two airbag devices 40 and 45 are explained with reference to FIG. 1B. It should be noted that a cover can be provided on each of the two airbag devices 40 and 45 in the direction of the driver's seat 30 and passenger seat 35, but this is not shown here for reasons of simplicity.
  • the gas generators 50 and 55 are operatively connected to a crash sensor and on-board electronics (not shown in each case), so that when an accident is detected, one or both of the gas generators 50 and 55 generate gas with which the first airbag 40-1 and second airbag are used 40-2 of the airbag device 40 or the first airbag 45-1 and the second airbag 45-2 of the airbag device 45 are filled with gas within milliseconds.
  • FIG. 1B shows the two airbag devices 40 and 45 in a second operating state.
  • an accident situation is shown in which the two gas generators 50 and 55 have generated gas (not shown) due to the action of a load F in accordance with a frontal crash of the motor vehicle 1 in such a way that the first two airbags 40-1 and 45-1 crash are filled.
  • Part of the gas in the first two air bags 40-1 and 45-1 is discharged through a gas channel 40-3 and 45-3 into the two respective second air bags 40-2 and 45-2.
  • a gas outlet means 40-4 or 45-4 arranged which can be designed as known per se with airbags Vents.
  • the two are Airbag devices 40 and 45 are thus set up in the event of an accident in such a way that the respective first airbags 40-1 and 45-1 serve as support means for the two second airbags 40-2 and 45-2, which in turn form a front body area of a respective, person in the driver's seat 30 or passenger seat 35 (not shown in each case).
  • FIG. 2 shows a further embodiment of the invention in the second operating state in a simplified side view.
  • An airbag device 40 is attached to an end wall 15 of a motor vehicle 1, the first airbag 40-1 of which is filled with gas (not shown) by means of a gas generator 55. Gas flows through a gas channel 40-3 arranged on the upper side of the first airbag 40-1 into a second airbag 40-2 which is welded to the first airbag 40-1 and is designed as a head airbag, such that a head of a not shown in FIG the motor vehicle 1 accidentally injured person.
  • the first airbag 40-1 serves as a support for the second airbag 40-2, which is designed as a head airbag.
  • a further airbag 60 which is designed as a knee airbag and is formed from five chambers 60-1, is located below the first airbag 40-1.
  • the airbag 60 is acted upon by a gas generator 65 which is independent of the gas generator 55 and which is not shown here.
  • the chambers 60-1 are fluidly connected to one another by means of gas channels 60-2, so that the gas generated by the gas generator can completely fill the airbag 60.
  • the airbag 60 is not connected to the first airbag 40-1 or second airbag 40-2 in the first operating state. Rather, it is separated from these, but is designed such that it nestles against the first airbag 40-1 when filled.
  • the first airbag 40-1 serves as a support for the airbag 60 designed as a knee airbag.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

For the purpose of increased design freedom when designing a motor vehicle interior (10), the invention relates to an airbag device (40, 45) having - at least one first airbag (40-1, 45-1), which is empty of gas in a first operating state and is full of gas in a second operating state, - at least one second airbag (40-2, 45-2, 60), which is empty of gas in a first operating state and is full of gas in a second operating state and configured to at least temporarily receive a body part of a vehicle occupant in the second operating state, wherein - the second airbag (40-2, 45-2, 60) is supported in the second operating state against the first airbag (40-1, 45-1) which is in the second operating state.

Description

AIRBAGVORRICHTUNG FÜR EIN KRAFTFAHRZEUG SOWIE HIERMIT AUSGESTATTETES KRAFTFAHRZEUG  AIRBAG DEVICE FOR A MOTOR VEHICLE AND A MOTOR VEHICLE FITTED WITH IT
Die vorliegende Erfindung betrifft eine Airbagvorrichtung für ein Kraftfahrzeug gemäß Anspruch 1 sowie ein hiermit ausgestattetes Kraftfahrzeug gemäß Anspruch 6. The present invention relates to an airbag device for a motor vehicle according to claim 1 and to a motor vehicle equipped therewith according to claim 6.
Bei bekannten, in Kraftfahrzeugen befindlichen Airbagvorrichtungen wird ein gasentleerter Airbag bzw. Luftsack vermittels eines Gasgenerators mit einem Gas befüllt. Der gasentleerte Zustand des Airbags kann als ein erster Betriebszustand, der gasbefüllte Zustand des Airbags als ein zweiter Betriebszustand betrachtet werden. Häufig stützt sich der Airbag bei Einnahme des zweiten Betriebszustandes gegen mindestens ein in dem Kraftfahrzeug befindliches Abstützelement, beispielsweise eine Instrumententafel, einen Dachhimmel, eine Türinnenverkleidung oder ein Sitzelement ab, um seine gewünschte Geometrie einnehmen zu können. In known airbag devices located in motor vehicles, a gas-emptied airbag or airbag is filled with a gas by means of a gas generator. The gas-deflated state of the airbag can be regarded as a first operating state, the gas-filled state of the airbag as a second operating state. When the second operating state is assumed, the airbag is frequently supported against at least one support element located in the motor vehicle, for example an instrument panel, a headliner, a door lining or a seat element, in order to be able to assume its desired geometry.
Nun besteht mehr und mehr der Wunsch nach Kraftfahrzeugen mit vergleichsweise flexibel einrichtbaren Innenräumen. So besteht beispielsweise der Wunsch nach kleinen Instrumententafeln oder sogar gar keinen Instrumententafeln, da hierdurch gegenüber dem bekannten Stand der Technik mehr Raum für Fahrzeuginsassen verbleibt. Es ergibt sich hierbei das Problem, dass die bei bekannten Airbags erforderlichen Abstützelemente zu klein sind, um eine Abstützfunktion für einen Airbag zu entfalten, oder diese sogar gänzlich entfallen. Now there is an increasing desire for motor vehicles with comparatively flexible interior spaces. For example, there is a desire for small instrument panels or even no instrument panels at all, since this leaves more space for vehicle occupants compared to the known prior art. The problem arises here that the support elements required in known airbags are too small to to develop a support function for an airbag, or even completely omitted.
Es ist Aufgabe der vorliegenden Erfindung, das genannte Problem zu lösen. It is an object of the present invention to solve the problem mentioned.
Diese Aufgabe wird durch eine Airbagvorrichtung gemäß Patentanspruch 1 gelöst. Vorteilhafte Ausgestaltungen sind in den hierzu gehörigen Unteransprüchen angegeben. This object is achieved by an airbag device according to claim 1. Advantageous refinements are specified in the associated subclaims.
Die erfindungsgemäße Airbagvorrichtung für ein Kraftfahrzeug weist mindestens einen ersten Luftsack und mindestens einen zweiten Luftsack auf. Jeder der beiden Luftsäcke ist in einem ersten, einen unfallfreien Gebrauch des Kraftfahrzeuges repräsentierenden Betriebszustand gasentleert und in einem zweiten, eine Unfallsituation repräsentierenden Betriebszustand gasgefüllt. Es ist erfindungsgemäß vorgesehen, gleichzeitig oder nacheinander beide Luftsäcke bei einem Unfall des Kraftfahrzeuges mit Gas zu befüllen. Im teilweise oder vollständig befüllten Zustand stützt der erste Luftsack den teilweise oder vollständig befüllten zweiten Luftsack ab und hält oder führt diesen optional. Mithin kann ein in einen Unfall verwickelter Insasse des Kraftfahrzeugs in an sich bekannter Weise gegen den zweiten Luftsack prallen, der von dem ersten Luftsack präzise geführt und in seiner Lage stabilisiert ist. In vorteilhafter Weise ist die erfindungsgemäße Airbagvorrichtung ein insgesamt zweckgebundenes und temporär wirkendes Abstützungsmittel für den Fahrzeuginsassen geschaffen, das bei einer unfallfreien Situation vergleichsweise wenig Raum in dem Kraftfahrzeug einnimmt, bei einem Unfall jedoch als gasgefülltes, steifigkeitserhöhendes und lastaufnehmendes Mittel ausgebildet ist. The airbag device according to the invention for a motor vehicle has at least one first airbag and at least one second airbag. Each of the two airbags is gas-emptied in a first operating state representing an accident-free use of the motor vehicle and gas-filled in a second operating state representing an accident situation. It is provided according to the invention to fill both air bags with gas at the same time or in succession in the event of an accident in the motor vehicle. In the partially or completely filled state, the first air bag supports the partially or completely filled second air bag and optionally holds or guides it. Thus, an occupant of the motor vehicle involved in an accident can crash into the second airbag in a manner known per se, which is precisely guided by the first airbag and stabilized in its position. Advantageously, the airbag device according to the invention provides a generally dedicated and temporarily acting support means for the vehicle occupant, which takes up comparatively little space in the motor vehicle in an accident-free situation, but is designed as a gas-filled, stiffness-increasing and load-absorbing means in the event of an accident.
Das erforderliche Gas wird in vorteilhafter Weise durch einen Gasgenerator erzeugt, der als pyrotechnischer Gasgenerator, Kaltgasgenerator oder Hybridgasgenerator ausgebildet sein kann. Eine Auslösung des Gasgenerators erfolgt aufgrund mindestens eines an sich bekannten, mit einer ebenfalls an sich bekannten Bordelektronik des Kraftfahrzeuges wirkverbundenen Crashsensors. The gas required is advantageously generated by a gas generator, which can be designed as a pyrotechnic gas generator, cold gas generator or hybrid gas generator. Triggering the gas generator takes place on the basis of at least one crash sensor which is known per se and is operatively connected to an on-board electronics of the motor vehicle which are also known per se.
Der erfindungsgemäß vorgesehene erste Luftsack bzw. zweite Luftsack kann aus jedem geeigneten Werkstoff ausgebildet sein. In besonders bevorzugter Weise ist dieser Werkstoff ein Polyamid oder ein Polyethylenterephtalat. Weiter können die beiden Luftsäcke (oder etwaige weiteren Luftsäcke) in vorteilhafter Weise einteilig ausgebildet sein oder, sofern diese mehrteilig ausgebildet sind, stoffschlüssig, kraftschlüssig oder formschlüssig miteinander verbunden sein. So ist es insbesondere möglich, den ersten Luftsack und den zweiten Luftsack miteinander zu verschweißen. The first airbag or second airbag provided according to the invention can be formed from any suitable material. This material is particularly preferably a polyamide or a polyethylene terephthalate. Furthermore, the two air bags (or any other air bags) can advantageously be made in one piece or, if they are made in several pieces, can be connected to one another in a material, non-positive or positive manner. In particular, it is possible to weld the first airbag and the second airbag together.
Gemäß einer vorteilhaften Ausbildung ist die erfindungsgemäße Airbagvorrichtung derart eingerichtet, dass sich das Volumen des ersten Luftsacks und/oder des zweiten Luftsacks bei Einnahme des zweiten Betriebszustandes in einer beliebigen Raumrichtung verändert. According to an advantageous embodiment, the airbag device according to the invention is set up such that the volume of the first airbag and / or the second airbag changes in any spatial direction when the second operating state is assumed.
Ein besonders einfacher Aufbau der Airbagvorrichtung ist in vorteilhafter Weise erzielt, wenn der erste Luftsack einen Schlauch aufweist oder als ein Schlauch ausgebildet ist. A particularly simple construction of the airbag device is advantageously achieved if the first airbag has a hose or is designed as a hose.
Gemäß einer bevorzugten Ausführungsform ist die mechanische Festigkeit des ersten, sich im zweiten Betriebszustand befindlichen Luftsacks größer als die mechanische Festigkeit des zweiten, sich im zweiten Betriebszustand befindlichen Luftsacks, wodurch die stabilisierende Wirkung des ersten Luftsackes zugunsten des zweiten Luftsackes in vorteilhafter Weise weiter verbessert ist. According to a preferred embodiment, the mechanical strength of the first airbag which is in the second operating state is greater than the mechanical strength of the second airbag which is in the second operating state, as a result of which the stabilizing effect of the first airbag is advantageously further improved in favor of the second airbag.
Dem Grundsatz kann können der erste Luftsack und der zweite Luftsack jeweils separate Gasgeneratoren aufweisen oder mit solchen wirkverbunden sein. In einem solchen Fall können die beiden Luftsäcke voneinander fluidisch getrennt sein, so dass sie in vorteilhafter Weise separat voneinander mit Gas befüllt werden können. Alternativ oder kumulativ ist es möglich, mindestens einen Gaskanal vorzusehen, der eingerichtet ist, Gas von dem ersten Luftsack zu dem zweiten Luftsack zu leiten. In diesem Fall sind die beiden Luftsäcke miteinander fluidisch verbunden, so dass eine Befüllung der beiden in vorteilhafter Weise weiter bzw. besser koordiniert bzw. gesteuert erfolgen kann. In weiterer vorteilhafter Weise kann der Gaskanal mit einem Ventilmittel wirkverbunden sein, mit dem der Gaseinleitungsvorgang von dem ersten Luftsack in den zweiten Luftsack noch besser gesteuert werden kann. In principle, the first airbag and the second airbag can each have separate gas generators or can be operatively connected to them. In In such a case, the two airbags can be fluidly separated from one another, so that they can advantageously be filled with gas separately from one another. Alternatively or cumulatively, it is possible to provide at least one gas channel which is set up to conduct gas from the first airbag to the second airbag. In this case, the two air bags are fluidly connected to one another, so that the two can advantageously be filled further or better coordinated or controlled. In a further advantageous manner, the gas channel can be operatively connected to a valve means with which the gas introduction process from the first airbag into the second airbag can be controlled even better.
Gemäß einer bevorzugten Ausführungsform verfügt der zweite Luftsack über mindestens ein Gasauslassmittel, durch welches das Gas nach einem definierten Zeitraum aus der erfindungsgemäßen, in einer Unfallsituation aufgeblasenen Airbagvorrichtung austreten kann. Das Gasauslassmittel kann insbesondere als Auslassventil ausgebildet sein und/oder in Form von definierten Öffnungen in der Außenhaut des zweiten Luftsacks, durch die das Gas peu-ä-peu austritt. Alternativ oder kumulativ ist es möglich, mindestens ein Gasauslassmittel in dem ersten Luftsack vorzusehen; das zuvor Gesagte gilt insofern adäquat. According to a preferred embodiment, the second airbag has at least one gas outlet means through which the gas can escape after a defined period of time from the airbag device according to the invention, which is inflated in an accident situation. The gas outlet means can in particular be designed as an outlet valve and / or in the form of defined openings in the outer skin of the second airbag, through which the gas exits peu-à-peu. Alternatively or cumulatively, it is possible to provide at least one gas outlet means in the first airbag; in this respect what has been said before applies adequately.
In besonders vorteilhafter Weise ist der zweite Luftsack als Kopfairbag, Seitenairbag oder Knieairbag ausgebildet, so dass unfallspezifischen Anforderungen auf einfache Art Rechnung getragen werden kann. In a particularly advantageous manner, the second airbag is designed as a head airbag, side airbag or knee airbag, so that accident-specific requirements can be taken into account in a simple manner.
Die oben genannte Aufgabe wird ebenfalls durch ein Kraftfahrzeug gelöst, das mindestens eine Airbagvorrichtung der zuvor offenbarten Art aufweist. Die dargestellten Vorteile gelten adäquat. Die erfindungsgemäße Airbagvorrichtung kann sich dabei an jedem geeigneten Ort in einem Kraftfahrzeug befinden, insbesondere an einer Stirnwand einer Kraftfahrzeugkarosserie. Nachstehend erfolgt unter Bezugnahme auf die beigefügten, nicht maßstäblichen Figuren eine detaillierte, nicht präjudizierende, insbesondere einschränkende, Beschreibung von Ausführungsbeispielen der vorliegenden Erfindung. Darin enthaltene gleiche Elemente sind mit gleichen Bezugszeichen versehen. The above-mentioned object is also achieved by a motor vehicle which has at least one airbag device of the type disclosed above. The advantages shown apply adequately. The airbag device according to the invention can be located at any suitable location in a motor vehicle, in particular on an end wall of a motor vehicle body. A detailed, non-prejudicial, in particular restrictive, description of exemplary embodiments of the present invention is given below with reference to the attached figures, which are not to scale. The same elements contained therein are provided with the same reference symbols.
Figur 1A ist eine vereinfachte Draufsicht auf einen im Frontbereich eines erfindungsgemäßen Kraftfahrzeuges befindlichenFIG. 1A is a simplified top view of a vehicle located in the front area of a motor vehicle according to the invention
Kraftfahrzeuginnenraum, in dem zwei in einem ersten Betriebszustand befindliche erfindungsgemäße Airbagvorrichtungen angeordnet sind. Motor vehicle interior in which two airbag devices according to the invention are arranged in a first operating state.
Figur 1 B zeigt die in der Figur 1A dargestellte Anordnung in einem zweiten Figure 1 B shows the arrangement shown in Figure 1A in a second
Betriebszustand.  Operating status.
Figur 2 ist eine vereinfachte Seitenansicht auf einen im Frontbereich eines erfindungsgemäßen Kraftfahrzeuges befindlichenFIG. 2 is a simplified side view of a vehicle located in the front area of a motor vehicle according to the invention
Kraftfahrzeuginnenraum, in dem eine in einem zweiten Betriebszustand befindliche, alternative Airbagvorrichtung angeordnet ist. Motor vehicle interior in which an alternative airbag device which is in a second operating state is arranged.
In Figur 1 A ist ein Teil eines erfindungsgemäßen Kraftfahrzeuges 1 in Draufsicht gezeigt. Konkret ist ein Teil eines Kraftfahrzeuginnenraumes 5 gezeigt, der eine einen Teil einer Karosserie 10 bildende Stirnwand 15, eine in Hauptfahrtrichtung betrachtet linke A-Säule 20, eine rechte A-Säule 25 sowie einen teilweise dargestellten Fahrersitz 30 und Beifahrersitz 35 aufweist. Eine Instrumententafel und ein Lenkrad sind gemäß diesem Ausführungsbeispiel in dem Kraftfahrzeug nicht vorgesehen, obgleich die Erfindung deren Verwendung in keiner Weise ausschließt. An der Stirnwand 15 sind zwei voneinander beabstandete, jeweils in einem ersten Betriebszustand befindliche Airbagvorrichtungen 40 bzw. 45 in Kraftfahrzeug- Querrichtung Q angeordnet, die jeweils einen Gasgenerator 50 bzw. 55 umfassen. Die in der Figur 1 A links befindliche Airbagvorrichtung 40 umfasst ferner einen ersten Luftsack 40-1 sowie einen hiermit verbundenen zweiten Luftsack 40-2, während die in dieser Figur rechts befindliche Airbagvorrichtung 45 ferner einen ersten Luftsack 45-1 und einen hiermit verbundenen zweiten Luftsack 45-2 umfasst. Weitere Bestandteile der beiden Airbagvorrichtungen 40 bzw. 45 werden unter Bezug auf Figur 1 B erläutert. Es sei angemerkt, dass an den beiden Airbagvorrichtungen 40 bzw. 45 in Richtung Fahrersitz 30 bzw. Beifahrersitz 35 jeweils eine Abdeckung vorgesehen sein kann, welche aus Gründen der Einfachheit hier jedoch nicht dargestellt ist. FIG. 1A shows a part of a motor vehicle 1 according to the invention in plan view. Specifically, a part of a motor vehicle interior 5 is shown which has an end wall 15 forming part of a body 10, a left A-pillar 20 viewed in the main direction of travel, a right A-pillar 25 and a driver seat 30 and front passenger seat 35 which are partially shown. According to this exemplary embodiment, an instrument panel and a steering wheel are not provided in the motor vehicle, although the invention does not in any way preclude their use. Arranged on the end wall 15 are two airbag devices 40 and 45, spaced apart from one another and each in a first operating state, in the transverse direction Q of the motor vehicle, each comprising a gas generator 50 and 55, respectively. The airbag device 40 located on the left in FIG. 1A further comprises a first airbag 40-1 and a second airbag 40-2 connected to it, while the airbag device 45 located on the right in this figure further comprises a first airbag 45-1 and a second airbag connected to it 45-2 includes. Further components of the two airbag devices 40 and 45 are explained with reference to FIG. 1B. It should be noted that a cover can be provided on each of the two airbag devices 40 and 45 in the direction of the driver's seat 30 and passenger seat 35, but this is not shown here for reasons of simplicity.
Die Gasgeneratoren 50 bzw. 55 sind mit einem Crashsensor und einer Bordelektronik (jeweils nicht gezeigt) wirkverbunden, so dass bei einer Detektierung eines Unfalls einer oder beide der Gasgeneratoren 50 bzw. 55 Gas erzeugen, mit dem der erste Luftsack 40-1 und zweite Luftsack 40-2 der Airbagvorrichtung 40 bzw. der erste Luftsack 45-1 und der zweite Luftsack 45-2 der Airbagvorrichtung 45 innerhalb von Millisekunden mit Gas befüllt werden. The gas generators 50 and 55 are operatively connected to a crash sensor and on-board electronics (not shown in each case), so that when an accident is detected, one or both of the gas generators 50 and 55 generate gas with which the first airbag 40-1 and second airbag are used 40-2 of the airbag device 40 or the first airbag 45-1 and the second airbag 45-2 of the airbag device 45 are filled with gas within milliseconds.
In Figur 1 B sind die beiden Airbagvorrichtungen 40 bzw. 45 in einem zweiten Betriebszustand gezeigt. Konkret ist eine Unfallsituation dargestellt, bei der die beiden Gasgeneratoren 50 bzw. 55 aufgrund der Einwirkung einer Last F entsprechend einem Frontalcrash des Kraftfahrzeuges 1 derart Gas (nicht gezeigt) erzeugt haben, dass die beiden ersten Luftsäcke 40-1 bzw. 45-1 prall gefüllt sind. Ein Teil des in den beiden ersten Luftsäcken 40-1 bzw. 45-1 befindlichen Gases wird durch einen Gaskanal 40-3 bzw. 45-3 in die beiden jeweiligen zweiten Luftsäcke 40-2 bzw. 45-2 abgeführt. Damit der durch das Gas hervorgerufene jeweilige Innendruck bei den beiden jeweiligen zweiten Luftsäcken 40-2 bzw. 45-2 geringer als bei den beiden ersten Luftsäcken 40-1 bzw. 45-1 ist, sind an letzteren jeweils ein Gasauslassmittel 40-4 bzw. 45-4 angeordnet, die wie an sich bei Airbags bekannte Vents ausgebildet sein können. Insgesamt sind die beiden Airbagvorrichtungen 40 bzw. 45 also bei einem Unfall derart eingerichtet, dass die jeweiligen ersten Luftsäcke 40-1 bzw. 45-1 als Stützmittel für die beiden zweiten Luftsäcke 40-2 bzw. 45-2 dienen, die ihrerseits einen vorderen Körperbereich einer jeweiligen, sich auf dem Fahrersitz 30 bzw. Beifahrersitz 35 befindlichen Person (jeweils nicht gezeigt) aufnehmen. FIG. 1B shows the two airbag devices 40 and 45 in a second operating state. Specifically, an accident situation is shown in which the two gas generators 50 and 55 have generated gas (not shown) due to the action of a load F in accordance with a frontal crash of the motor vehicle 1 in such a way that the first two airbags 40-1 and 45-1 crash are filled. Part of the gas in the first two air bags 40-1 and 45-1 is discharged through a gas channel 40-3 and 45-3 into the two respective second air bags 40-2 and 45-2. So that the respective internal pressure caused by the gas in the two respective second air bags 40-2 or 45-2 is lower than in the two first air bags 40-1 or 45-1, a gas outlet means 40-4 or 45-4 arranged, which can be designed as known per se with airbags Vents. Overall, the two are Airbag devices 40 and 45 are thus set up in the event of an accident in such a way that the respective first airbags 40-1 and 45-1 serve as support means for the two second airbags 40-2 and 45-2, which in turn form a front body area of a respective, person in the driver's seat 30 or passenger seat 35 (not shown in each case).
In Figur 2 ist eine weitere, im zweiten Betriebszustand befindliche Ausführungsform der Erfindung in vereinfachter Seitenansicht dargestellt. An einer Stirnwand 15 eines Kraftfahrzeuges 1 ist eine Airbagvorrichtung 40 befestigt, deren erster Luftsack 40-1 vermittels eines Gasgenerators 55 mit Gas (nicht gezeigt) befüllt ist. Durch einen an der oberen Seite des ersten Luftsacks 40-1 angeordneten Gaskanal 40-3 ist Gas in einen an dem ersten Luftsack 40-1 angeschweißten, als Kopfairbag ausgebildeten zweiten Luftsack 40-2 derart eingeströmt, dass ein Kopf einer hier nicht gezeigten, in dem Kraftfahrzeug 1 verunfallten Person sicher aufgenommen wird. Auch hier dient also der erste Luftsack 40-1 als Abstützmittel für den als Kopfairbag ausgebildeten zweiten Luftsack 40-2. FIG. 2 shows a further embodiment of the invention in the second operating state in a simplified side view. An airbag device 40 is attached to an end wall 15 of a motor vehicle 1, the first airbag 40-1 of which is filled with gas (not shown) by means of a gas generator 55. Gas flows through a gas channel 40-3 arranged on the upper side of the first airbag 40-1 into a second airbag 40-2 which is welded to the first airbag 40-1 and is designed as a head airbag, such that a head of a not shown in FIG the motor vehicle 1 accidentally injured person. Here too, the first airbag 40-1 serves as a support for the second airbag 40-2, which is designed as a head airbag.
Unterhalb des ersten Luftsacks 40-1 befindet sich gemäß diesem Ausführungsbeispiel ein weiterer, als Knieairbag ausgebildeter Luftsack 60, der aus fünf Kammern 60-1 ausgebildet ist. Der Luftsack 60 wird über einen von dem Gasgenerator 55 unabhängigen Gasgenerator 65 mit einem hier nicht gezeigten Gas beaufschlagt. Die Kammern 60-1 sind miteinander fluidisch mittels Gaskanälen 60-2 verbunden, so dass das von dem Gasgenerator erzeugte Gas den Luftsack 60 vollständig befüllen kann. Der Luftsack 60 ist im ersten Betriebszustand nicht mit dem ersten Luftsack 40-1 oder zweiten Luftsack 40-2 verbunden. Er ist vielmehr von diesen getrennt, jedoch so ausgebildet, dass er sich im befüllten Zustand gegen den ersten Luftsack 40-1 anschmiegt. Auch in diesem Fall dient also der erste Luftsack 40-1 als Abstützmittel für den als Knieairbag ausgebildeten Luftsack 60. Bezugszeichenliste According to this exemplary embodiment, a further airbag 60, which is designed as a knee airbag and is formed from five chambers 60-1, is located below the first airbag 40-1. The airbag 60 is acted upon by a gas generator 65 which is independent of the gas generator 55 and which is not shown here. The chambers 60-1 are fluidly connected to one another by means of gas channels 60-2, so that the gas generated by the gas generator can completely fill the airbag 60. The airbag 60 is not connected to the first airbag 40-1 or second airbag 40-2 in the first operating state. Rather, it is separated from these, but is designed such that it nestles against the first airbag 40-1 when filled. In this case too, the first airbag 40-1 serves as a support for the airbag 60 designed as a knee airbag. Reference symbol list
1 Kraftfahrzeug 1 motor vehicle
5 Kraftfahrzeuginnenraum 5 motor vehicle interior
10 Karosserie 10 body
15 Stirnwand  15 end wall
20 linke A-Säule  20 left A-pillar
25 rechte A-Säule 25 right A-pillar
30 Fahrersitz 30 driver's seat
35 Beifahrersitz  35 Passenger seat
40 Airbagvorrichtung 40 airbag device
40-1 erster Luftsack40-1 first airbag
40-2 zweiter Luftsack40-2 second airbag
40-3 Gaskanal 40-3 gas channel
40-4 Gasauslassmittel 40-4 gas outlet means
45 Airbagvorrichtung45 airbag device
45-1 erster Luftsack45-1 first airbag
45-2 zweiter Luftsack45-2 second airbag
45-3 Gaskanal 45-3 gas channel
45-4 Gasauslassmittel 45-4 gas outlet means
50 Gasgenerator 50 gas generator
55 Gasgenerator  55 gas generator
60 Luftsack  60 airbag
60-1 Kammern 60-2 Gaskanal 60-1 chambers 60-2 gas channel
65 Gasgenerator  65 gas generator
F Last F load
Q Fahrzeugquerrichtung x, y, z Kartesisches Koordinatensystem gemäß ISO 4130-1978  Q Vehicle transverse direction x, y, z Cartesian coordinate system according to ISO 4130-1978

Claims

Ansprüche Expectations
1. Airbagvorrichtung (40, 45) für ein Kraftfahrzeug (1 ), mit 1. Airbag device (40, 45) for a motor vehicle (1) with
mindestens einem ersten Luftsack (40-1 , 45-1 ), der in einem ersten Betriebszustand gasentleert und in einem zweiten Betriebszustand gasgefüllt ist,  at least one first airbag (40-1, 45-1) which is gas-emptied in a first operating state and gas-filled in a second operating state,
mindestens einem zweiten Luftsack (40-2, 45-2, 60), der in einem ersten Betriebszustand gasentleert und in einem zweiten Betriebszustand gasgefüllt und eingerichtet ist, einen Körperteil eines Fahrzeuginsassen im zweiten Betriebszustand mindestens zeitweise aufzunehmen, wobei - der zweite Luftsack (40-2 ,45-2, 60) im zweiten Betriebszustand gegen den ersten, im zweiten Betriebszustand befindlichen Luftsack (40-1 , 45- 1 ) abgestützt ist.  at least one second airbag (40-2, 45-2, 60), which is gas-emptied in a first operating state and gas-filled in a second operating state and is designed to at least temporarily accommodate a body part of a vehicle occupant in the second operating state, wherein - the second airbag (40 -2, 45-2, 60) is supported in the second operating state against the first airbag (40-1, 45-1) in the second operating state.
2. Airbagvorrichtung (40, 45) nach Anspruch 1 , dadurch gekennzeichnet, dass die mechanische Festigkeit des ersten, sich im zweiten Betriebszustand befindlichen Luftsacks (40-1 , 45-1 ) größer als die mechanische Festigkeit des zweiten, sich im zweiten Betriebszustand befindlichen Luftsacks (40-2 ,45-2, 60) ist. 2. Airbag device (40, 45) according to claim 1, characterized in that the mechanical strength of the first airbag (40-1, 45-1) in the second operating state is greater than the mechanical strength of the second airbag (40-1, 45-1) Air bags (40-2, 45-2, 60).
3. Airbagvorrichtung (40, 45) nach Anspruch 1 oder 2, gekennzeichnet durch mindestens einen Gaskanal (40-3, 45-3), der eingerichtet ist, Gas von dem ersten Luftsack (40-1 , 45-1 ) zu dem zweiten Luftsack (40-2 ,45-2, 60) zu leiten. 3. Airbag device (40, 45) according to claim 1 or 2, characterized by at least one gas channel (40-3, 45-3), which is set up, gas from the first airbag (40-1, 45-1) to the second Air bag (40-2, 45-2, 60).
4. Airbagvorrichtung (40, 45) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Luftsack (40-2 ,45-2, 60) ein Gasauslassmittel (40-4, 45-4) aufweist, während der erste Luftsack (40-1 , 45-1 ) kein Gasauslassmittel aufweist. 4. Airbag device (40, 45) according to one of the preceding claims, characterized in that the second airbag (40-2, 45-2, 60) has a gas outlet means (40-4, 45-4), while the first airbag ( 40-1, 45-1) has no gas outlet means.
5. Airbagvorrichtung (40, 45) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Luftsack (40-2 ,45-2, 60) als Kopfairbag, Seitenairbag oder Knieairbag ausgebildet ist. 5. Airbag device (40, 45) according to one of the preceding claims, characterized in that the second airbag (40-2, 45-2, 60) is designed as a head airbag, side airbag or knee airbag.
6. Kraftfahrzeug (1 ), gekennzeichnet durch mindestens eine Airbagvorrichtung (40, 45) nach einem der Ansprüche 1 bis 5. 6. Motor vehicle (1), characterized by at least one airbag device (40, 45) according to one of claims 1 to 5.
PCT/EP2019/077722 2018-10-31 2019-10-14 Airbag device for a motor vehicle and motor vehicle equipped therewith WO2020088921A1 (en)

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DE102018127216.2A DE102018127216A1 (en) 2018-10-31 2018-10-31 Airbag device for a motor vehicle and motor vehicle equipped therewith

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DE10106238B4 (en) * 2001-02-10 2012-09-13 Volkswagen Ag Safety device for a vehicle, in particular for a motor vehicle
DE102010019592B4 (en) * 2010-05-05 2015-04-16 Autoliv Development Ab Passenger front airbag device for installation in the dashboard of a motor vehicle

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Publication number Priority date Publication date Assignee Title
US5577765A (en) * 1994-09-06 1996-11-26 Takata Corporation Air bag device
DE10021893A1 (en) * 2000-05-05 2001-11-08 Volkswagen Ag Airbag unit with several front airbags; has several front airbags including thorax and support airbags, which are supported along vehicle shell to form common restraint system
DE102007051281A1 (en) * 2007-10-26 2009-04-30 Daimler Ag Airbag system for use on front seat passenger side of motor vehicle, has airbag formed from airbag chambers, where one chamber is fillable with gas in one stage and another chamber is fillable with gas in another stage
US20120049491A1 (en) * 2009-05-06 2012-03-01 Autoliv Developemenmt Ab Airbag module
DE102010005530A1 (en) * 2010-01-23 2011-07-28 Bayerische Motoren Werke Aktiengesellschaft, 80809 Air bag system for front seat passenger of motor car, has gas generator blowing up two airbags before vehicle occupants, where one of airbags supports other airbag during collision with vehicle occupants
DE102010051793A1 (en) * 2010-11-18 2012-05-24 GM Global Technology Operations LLC Motor vehicle, particularly passenger car, has inflatable side air bag that is provided in inflated condition against outlet, particularly recess, of side structure

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