DE19846641A1 - Inflation system for vehicle occupant protection airbag has cold gas source and pyrotechnic gas generator able to be activated by crash sensor individually or sequentially at defined interval - Google Patents

Inflation system for vehicle occupant protection airbag has cold gas source and pyrotechnic gas generator able to be activated by crash sensor individually or sequentially at defined interval

Info

Publication number
DE19846641A1
DE19846641A1 DE1998146641 DE19846641A DE19846641A1 DE 19846641 A1 DE19846641 A1 DE 19846641A1 DE 1998146641 DE1998146641 DE 1998146641 DE 19846641 A DE19846641 A DE 19846641A DE 19846641 A1 DE19846641 A1 DE 19846641A1
Authority
DE
Germany
Prior art keywords
gas generator
airbag
activated
gas source
cold gas
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE1998146641
Other languages
German (de)
Inventor
Ruprecht Sinnhuber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE1998146641 priority Critical patent/DE19846641A1/en
Publication of DE19846641A1 publication Critical patent/DE19846641A1/en
Withdrawn legal-status Critical Current

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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
    • B60R21/26—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
    • B60R2021/0002—Type of accident
    • B60R2021/0018—Roll-over
    • 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
    • B60R2021/165—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags reusable, e.g. in case of multiple collisions
    • 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
    • B60R2021/26058—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a combination of inflators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • B60R2021/2633—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output with a plurality of inflation levels
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas

Landscapes

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

Abstract

The inflation arrangement has a cold gas source (4), a pyrotechnic gas generator (5) and at least one crash sensor (7) for activating them. The cold gas source and pyrotechnic gas generator can be activated by the crash sensor either individually and single or at a defined time interval one after the other.

Description

Die Erfindung betrifft eine Aufblaseinrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an inflator according to the preamble of Claim 1.

Bekanntlich verwendet man zum Aufblasen eines Airbags entweder eine Kaltgasquelle mit einem Ventil, das beim Auftreten eines Front-, Heck- oder Seitencrashs bzw. beim Rollover durch ein Signal eines Sensors beispielsweise auf pyrotechnischem Wege zerstört wird, oder einen pyrotechnischen Gaserzeuger mit Pellets, der über den Sensor ebenfalls auf pyrotechnischem Wege gezündet wird; in diesem Falle wird dann heißes Gas erzeugt.As is known, either a cold gas source is used to inflate an airbag with a valve that when a front, rear or side crash occurs or when Rollover by a signal from a sensor, for example pyrotechnically is destroyed, or a pyrotechnic gas generator with pellets that passes through the sensor is also ignited by pyrotechnic means; in this case it becomes hot Produces gas.

Bekannt sind auch Hybrid-Aufblaseinrichtungen mit Kaltgasquelle und pyrotechnischem Gaserzeuger. Sobald der pyrotechnische Gaserzeuger vom Sensor her aktiviert wird, sorgt er auch für die Lieferung von Kaltgas zu dem aufzublasenden Airbag, so daß diesem praktisch gleichzeitig sowohl Kaltgas als auch heißes Gas zugeführt wird.Hybrid inflators with a cold gas source and pyrotechnic are also known Gas generator. As soon as the pyrotechnic gas generator is activated by the sensor, he also ensures the delivery of cold gas to the air bag to be inflated, so that Both cold gas and hot gas are supplied to this practically simultaneously.

Bei der Konzeption von Aufblaseinrichtungen für Airbags ist jedoch eine Reibe unterschiedlicher Gesichtspunkte zu berücksichtigen, die teils aus Einbauverhältnissen, teils aus Abhängigkeiten des optimalen Deformationsverhaltens des Airbags bei unterschiedlichen Unfallarten resultieren. So kann es, wenn ein schneller Druckanstieg im Airbag erwünscht ist und zwischen diesem und der Aufblaseinrichtung sich keine langen und demgemäß Strömungsverluste hervorrufenden Leitungen erstrecken, zweckmäßig sein, zum Aktivieren des Airbags Kaltgas zu verwenden, das einen schnellen Druckanstieg gewährleistet und in jedem Fall thermische Beschädigungen des Airbaggewebes vermeidet. In diesem Falle würde die Auslösung des pyrotechnischen Gaserzeugers, dessen Druck-Zeit-Kennlinie flacher als diejenige der ausgelösten Kaltgasquelle verläuft, nur zur zusätzlichen Druckerhöhung dienen. Ist dagegen die Kaltgasquelle, wie bei dem Seitenschutz von Fahrzeuginsassen dienenden Seitenairbags häufig der Fall, an einer vom Airbag entfernten Stelle des Fahrzeugs untergebracht, so machen sich durch die entsprechend langen Leitungen hervorgerufene Strömungsverluste bemerkbar. Dann ist es zweckmäßig, einen Druckaufbau im Airbag mittels des pyrotechnischen Gaserzeugers vorzunehmen und die Kaltgaszufuhr zur Verlängerung der Standzeit des aufgeblasenen Airbags zusätzlich vorzusehen.However, there is a grater in the design of inflators for airbags to take into account different points of view, some of them from installation conditions, partly from dependencies on the optimal deformation behavior of the airbag different types of accidents result. So it can if there is a rapid increase in pressure is desired in the airbag and none between it and the inflator extend long and accordingly flow-causing lines, be expedient to use cold gas to activate the airbag, the one ensures rapid pressure rise and in any case thermal damage to the Avoids airbag fabric. In this case, the triggering of the pyrotechnic Gas generator whose pressure-time characteristic is flatter than that of the triggered Cold gas source runs, only serve to increase the pressure. Is against that  Cold gas source, such as in the side protection of side airbags for vehicle occupants often the case, housed at a point of the vehicle away from the airbag, so are caused by the correspondingly long cables Flow losses noticeable. Then it is advisable to build up pressure in the airbag by means of the pyrotechnic gas generator and the cold gas supply to To extend the service life of the inflated airbag additionally.

Wieder ein anderer Gesichtspunkt ist bei einem dem Seitenaufprallschutz dienenden Airbag und Out-of-Position-Situation, also beispielsweise dann, wenn ein schlafender Fahrzeuginsasse seinen Kopf seitlich angelehnt hat, beachtlich. Hier muß eine anfängliche elastische Deformierbarkeit ("Gummiballeffekt") des Airbags vermieden werden. Um dies zu erreichen, wird der Airbag zweckmäßigerweise vom pyrotechnischen Gaserzeuger her mit heißem Gas beliefert und aufgeblasen, das sich abkühlt und dadurch eine plastische Verformbarkeit des Airbags sicherstellt. Schließt sich an den Seitenaufprall ein Rollover an, den man beispielsweise mittels eines bekannten Rollover- Sensors durch Erfassung einer bestimmten Zahl von Überschlägen sensieren kann, ist es zweckmäßig, nach dem Aufblasen des Airbags mit heißem Gas die Kaltgasquelle zu aktivieren, um eine Verlängerung der Standzeit des Airbags zu erhalten.Another aspect is that of a side impact protection Airbag and out-of-position situation, for example when sleeping Vehicle occupant leaned his head sideways, remarkable. Here one must initial elastic deformability ("rubber ball effect") of the airbag avoided become. In order to achieve this, the airbag is expediently made by the pyrotechnic Gas generator supplied and inflated with hot gas that cools and thereby ensuring plastic deformability of the airbag. Joins the Side impact to a rollover, which can be used, for example, using a known rollover Sensor can sense by detecting a certain number of rollovers it is advisable to close the cold gas source after inflating the airbag with hot gas activate in order to extend the service life of the airbag.

Wie diese einleitende Betrachtung zeigt, lassen sich die beim Aufblasen eines Airbags vorliegenden Faktoren auch mit der bekannten Hybrideinrichtung, bei der praktisch gleichzeitig die Kaltgasquelle und der pyrotechnische Gaserzeuger aktiviert werden, zumindest nicht optimal berücksichtigen.As this introductory observation shows, these can be done by inflating an airbag present factors also with the known hybrid device, in the practical the cold gas source and the pyrotechnic gas generator are activated at the same time, at least not optimally considered.

Der Erfindung liegt mithin die Aufgabe zugrunde, eine gattungsgemäße Aufblaseinrichtung zu schaffen, die den jeweils vorliegenden Bedingungen angepaßt ist.The invention is therefore based on the object, a generic To create inflator that is adapted to the prevailing conditions.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Hauptanspruchs, vorteilhafte Ausbildungen der Erfindung beschreiben die Unteransprüche.The inventive solution to this problem consists in the characterizing Features of the main claim describe advantageous embodiments of the invention the subclaims.

Während beim Stand der Technik also, wie beschrieben, Kaltgasquelle und pyrotechnischer Gaserzeuger gleichzeitig aktiviert werden, nämlich der pyrotechnische Gaserzeuger unmittelbar über den Sensor und die Kaltgasquelle durch die Aktivierung des pyrotechnischen Gaserzeugers, sieht die Erfindung bewußt eine vorgegebene zeitliche Aufeinanderfolge mit bestimmtem zeitlichen Abstand der Aktivierungsvorgänge von Kaltgasquelle und pyrotechnischem Gaserzeuger vor, wobei die zeitliche Aufeinanderfolge als solche, d. h. der zeitliche Vorrang von Kaltgasquelle oder Gaserzeuger, sowie die Größe des zeitlichen Abstands zwischen beiden Aktivierungsvorgängen durch die jeweils vorliegenden, oben aufgezeigten Einflußgrößen bestimmt sind. Beispiele hierfür sind in den Unteransprüchen angegeben.While in the prior art, as described, cold gas source and pyrotechnic gas generators are activated simultaneously, namely the pyrotechnic Gas generator directly via the sensor and the cold gas source through the activation of the pyrotechnic gas generator, the invention deliberately sees a given one  chronological sequence with a certain time interval between the activation processes of cold gas source and pyrotechnic gas generator before, the temporal Sequence as such, i.e. H. the temporal priority of cold gas source or Gas generator, as well as the size of the time interval between the two Activation processes by the respective influencing variables shown above are determined. Examples of this are given in the subclaims.

Bei leichteren Unfällen und im Out-of-Position-Fall sieht die Erfindung vor, nur die Kaltgasquelle oder nur den Gaserzeuger zu aktivieren, so daß der Fahrzeuginsasse möglichst wenig zusätzlich belastet wird und eine Aufblasmöglichkeit für den Airbag verbleibt für eine eventuelle zweite Kollision.In the case of minor accidents and in the out-of-position case, the invention provides only that Activate cold gas source or only the gas generator so that the vehicle occupant is burdened as little as possible and there is a possibility of inflating the airbag remains for a possible second collision.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnung erläutert, die rein schematisch eine Aufblaseinrichtung für einen Airbag wiedergibt, der als Seitenaufprallschutz und Schutz bei Rollover dient. Da Airbag, Kaltgasquelle und pyrotechnischer Gaserzeuger sowie Crashsensoren an sich bekannt sind, erübrigt sich eine ins einzelne gehende Beschreibung.An embodiment of the invention is described below with reference to the drawing explained, which purely schematically represents an inflator for an airbag, the serves as side impact protection and protection during rollover. Because airbag, cold gas source and pyrotechnic gas generators and crash sensors are known per se, is unnecessary a detailed description.

Der Airbag 1 ist an einer Seitenwand oder einem Seitenpfosten des Fahrzeugs in an sich bekannter Weise untergebracht. Über Leitungen 2 und 3 kann er mit Kaltgas aus der Kaltgasquelle 4 oder heißem Gas aus dem pyrotechnischen Gaserzeuger 5 beliefert werden. Dazu ist es erforderlich, daß auf pyrotechnischem Wege das Ventil 6 zerstört oder ebenfalls auf pyrotechnischem Wege der Gaserzeuger 5, der mit Pellets bestückt ist, gezündet wird.The airbag 1 is accommodated on a side wall or a side post of the vehicle in a manner known per se. It can be supplied with cold gas from the cold gas source 4 or hot gas from the pyrotechnic gas generator 5 via lines 2 and 3 . For this purpose, it is necessary that the valve 6 is destroyed in a pyrotechnic way or that the gas generator 5 , which is equipped with pellets, is also ignited in a pyrotechnic way.

Diese Aktivierungsvorgänge werden durch Signale des Crashsensors 7 ausgelöst, der auf Seitenaufprälle und Rollover anspricht.These activation processes are triggered by signals from the crash sensor 7 , which responds to side impacts and rollovers.

Während die Signale des Sensors 7 dem pyrotechnischen Gaserzeuger 5 sofort zugeführt werden, erhält die Aktivierungsvorrichtung 8 des Ventils 6 diese Signale über die Verzögerungsstufe 9 an sich bekannten Aufbaus. Das bedeutet, daß bei einem Unfall der Airbag 1 zunächst mit heißem Gas aus dem pyrotechnischen Gaserzeuger 5 aufgeblasen wird, er also plastisch d. h. nicht elastisch deformierbar ist, und daß erst nach Ablauf einer durch die jeweiligen Unfallparameter vorgegebenen Zeitspanne, für die die Verzögerungsstufe 9 ausgelegt ist, das Ventil 6 zerstört und der Airbag 1 mit Kaltgas gleichsam nachgeladen wird; dadurch wird eine Verlängerung der Standzeit erzielt, z. B. auf 7 sec.While the signals from the sensor 7 are fed to the pyrotechnic gas generator 5 immediately, the activation device 8 of the valve 6 receives these signals via the delay stage 9 , which is known per se. This means that in the event of an accident, the airbag 1 is first inflated with hot gas from the pyrotechnic gas generator 5 , that is to say it is plastically, ie not elastically deformable, and only after a period of time predetermined by the respective accident parameters, for which the deceleration stage 9 is designed is, the valve 6 is destroyed and the airbag 1 is recharged with cold gas; an extension of the tool life is achieved, e.g. B. to 7 sec.

Mit der Erfindung ist demgemäß eine gattungsgemäße Aufblaseinrichtung geschaffen, die mit leicht beherrschbaren Bauteilen aufgebaut und leicht an verschiedene Einsatzbedingungen anpaßbar ist.The invention accordingly provides a generic inflator, which are built with easily controllable components and easily to different Operating conditions is adaptable.

Claims (6)

1. Aufblaseinrichtung für einen dem Fahrzeuginsassenschutz dienenden Airbag, enthaltend eine Kaltgasquelle, einen pyrotechnischen Gaserzeuger und zumindest einen diesen zur Aktivierung zugeordneten Crashsensor, dadurch gekennzeichnet, daß Kaltgasquelle (4) und Gaserzeuger (5) individuell einzeln oder mit vorgegebenem zeitlichen Abstand und in vorgegebener Aufeinanderfolge durch den Sensor (7) aktivierbar sind.1. Inflation device for an airbag serving the vehicle occupant protection, containing a cold gas source, a pyrotechnic gas generator and at least one crash sensor assigned to this activation, characterized in that the cold gas source ( 4 ) and gas generator ( 5 ) individually individually or with a predetermined time interval and in a predetermined sequence can be activated by the sensor ( 7 ). 2. Aufblaseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei airbagnahem Einbau des Gaserzeugers (5) zur Vermeidung thermischer Beschädigungen des Airbags (1) der Gaserzeuger (5) zeitlich nach der Kaltgasquelle (4) aktivierbar ist.2. Inflation device according to claim 1, characterized in that when the gas generator ( 5 ) is installed near the airbag to avoid thermal damage to the airbag ( 1 ), the gas generator ( 5 ) can be activated in time after the cold gas source ( 4 ). 3. Aufblaseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei Strömungsverluste hervorrufenden Verbindungsleitungen (3) zwischen Airbag (1) und Gaserzeuger (5) dieser zeitlich vor der dann der Verlängerung der Standzeit des Airbags (1) dienenden Kaltgasquelle (4) aktivierbar ist.3. Inflation device according to claim 1, characterized in that in the case of flow losses causing connecting lines ( 3 ) between the airbag ( 1 ) and gas generator ( 5 ) this can be activated in time before the then extending the service life of the airbag ( 1 ) cold gas source ( 4 ). 4. Aufblaseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei einem dem Seitenaufprallschutz dienenden Airbag (1) zumindest im Out-of-Position-Fall zur Vermeidung einer anfänglichen elastischen Deformierbarkeit des Airbags (1) zunächst der Gaserzeuger (5) aktivierbar ist.4. Inflation device according to claim 1, characterized in that in a side impact protection airbag ( 1 ) at least in the out-of-position case to avoid an initial elastic deformability of the airbag ( 1 ) the gas generator ( 5 ) can first be activated. 5. Aufblaseinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß bei einem Rollover zeitlich nach dem Gaserzeuger (5) die Kaltgasquelle (4) aktivierbar ist.5. Inflation device according to claim 4, characterized in that in a rollover time after the gas generator ( 5 ), the cold gas source ( 4 ) can be activated. 6. Aufblaseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei Aufprällen mit geringer Energie und/oder im Out-of-Position-Fall nur der Gaserzeuger (5) oder nur die Kaltgasquelle (4) aktivierbar ist.6. Inflation device according to claim 1, characterized in that in the case of impacts with low energy and / or in the out-of-position case, only the gas generator ( 5 ) or only the cold gas source ( 4 ) can be activated.
DE1998146641 1998-10-09 1998-10-09 Inflation system for vehicle occupant protection airbag has cold gas source and pyrotechnic gas generator able to be activated by crash sensor individually or sequentially at defined interval Withdrawn DE19846641A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998146641 DE19846641A1 (en) 1998-10-09 1998-10-09 Inflation system for vehicle occupant protection airbag has cold gas source and pyrotechnic gas generator able to be activated by crash sensor individually or sequentially at defined interval

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998146641 DE19846641A1 (en) 1998-10-09 1998-10-09 Inflation system for vehicle occupant protection airbag has cold gas source and pyrotechnic gas generator able to be activated by crash sensor individually or sequentially at defined interval

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DE19846641A1 true DE19846641A1 (en) 2000-04-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247698A3 (en) * 2001-04-06 2003-09-17 Robert Bosch Gmbh Safety device for a pedestrian
DE102007037604A1 (en) * 2007-08-07 2009-02-12 Takata-Petri Ag Airbag module for a motor vehicle
WO2012126608A1 (en) * 2011-03-22 2012-09-27 Autoliv Development Ab Knee airbag module with a two-stage inflating unit
WO2020169641A1 (en) * 2019-02-19 2020-08-27 Zf Automotive Germany Gmbh Vehicle-integrated restraint system

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Publication number Priority date Publication date Assignee Title
DE2131744B2 (en) * 1970-06-26 1977-07-28 Nissan Motor Co., Ltd, Yokohama (Japan) GAS BAG IMPACT PROTECTION DEVICE
GB2292788A (en) * 1994-08-26 1996-03-06 Autoliv Dev A gas generator arrangement
DE19610041A1 (en) * 1995-03-14 1996-09-19 Trw Inc Airbag inflator used in two stages
EP0733519A2 (en) * 1995-03-22 1996-09-25 Morton International, Inc. Multiple stage air bag inflator system
DE19548571C1 (en) * 1995-12-23 1997-05-22 Mst Automotive Gmbh Device for quickly inflating an air cushion
DE19602008A1 (en) * 1996-01-20 1997-07-24 Temic Bayern Chem Airbag Gmbh Gas generator for generating a gas mixture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2131744B2 (en) * 1970-06-26 1977-07-28 Nissan Motor Co., Ltd, Yokohama (Japan) GAS BAG IMPACT PROTECTION DEVICE
GB2292788A (en) * 1994-08-26 1996-03-06 Autoliv Dev A gas generator arrangement
DE19610041A1 (en) * 1995-03-14 1996-09-19 Trw Inc Airbag inflator used in two stages
EP0733519A2 (en) * 1995-03-22 1996-09-25 Morton International, Inc. Multiple stage air bag inflator system
DE19548571C1 (en) * 1995-12-23 1997-05-22 Mst Automotive Gmbh Device for quickly inflating an air cushion
DE19602008A1 (en) * 1996-01-20 1997-07-24 Temic Bayern Chem Airbag Gmbh Gas generator for generating a gas mixture

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1247698A3 (en) * 2001-04-06 2003-09-17 Robert Bosch Gmbh Safety device for a pedestrian
US6828697B2 (en) 2001-04-06 2004-12-07 Robert Bosch Gmbh Device for protecting a pedestrian
DE102007037604A1 (en) * 2007-08-07 2009-02-12 Takata-Petri Ag Airbag module for a motor vehicle
US7963555B2 (en) 2007-08-07 2011-06-21 Takata-Petri Ag Airbag module for motor vehicle
WO2012126608A1 (en) * 2011-03-22 2012-09-27 Autoliv Development Ab Knee airbag module with a two-stage inflating unit
WO2020169641A1 (en) * 2019-02-19 2020-08-27 Zf Automotive Germany Gmbh Vehicle-integrated restraint system

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