WO2002008025A1 - Dispositif de protection des occupants - Google Patents

Dispositif de protection des occupants Download PDF

Info

Publication number
WO2002008025A1
WO2002008025A1 PCT/EP2001/008330 EP0108330W WO0208025A1 WO 2002008025 A1 WO2002008025 A1 WO 2002008025A1 EP 0108330 W EP0108330 W EP 0108330W WO 0208025 A1 WO0208025 A1 WO 0208025A1
Authority
WO
WIPO (PCT)
Prior art keywords
protection device
occupant protection
occupant
gas
motor vehicle
Prior art date
Application number
PCT/EP2001/008330
Other languages
German (de)
English (en)
Inventor
Klaus Oehm
Original Assignee
Volkswagen 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
Priority claimed from DE20012864U external-priority patent/DE20012864U1/de
Priority claimed from DE2000138298 external-priority patent/DE10038298A1/de
Application filed by Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to AU2001279763A priority Critical patent/AU2001279763A1/en
Publication of WO2002008025A1 publication Critical patent/WO2002008025A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/276—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 to vent the inflation fluid source, e.g. in case of overpressure
    • 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
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means

Definitions

  • the invention relates to an occupant protection device intended for a motor vehicle with an air cushion which, in a critical driving situation, is filled explosively by a pyrotechnic gas generator and is emptied through at least one outflow opening when the occupant collides.
  • Such an occupant protection device has already become an integral part of the occupant protection concept in modern automobile construction, in order to reduce the risk to motor vehicle occupants in the event of an accident and thus to increase passive safety.
  • the air cushion is filled explosively by the gas generator such that it is initially completely filled.
  • the air cushion is partially emptied again and the impact energy of the occupants to be protected is comparatively "gently" absorbed with physiologically compatible surface pressures and deceleration values. This prevents head and chest injuries or at least significantly alleviates them.
  • the air cushion also makes sense if the occupant is protected by a seat belt, since even with an additional belt tensioner in the event of a severe impact, the occupant cannot be prevented from moving forward and the head hit on the steering wheel or other equipment elements of the motor vehicle.
  • DE-OS 21 25 967 proposes to blow the gases from the air cushion outward from the motor vehicle.
  • an outlet line with an inside diameter of such a size is used that there is no hindrance when filling the air cushion and its outflow opening ends outside the motor vehicle.
  • the gases flowing out through the outflow opening are to be vented into the dashboard in order to thereby minimize the amount of particles released into the motor vehicle interior.
  • a ventilation device present on the motor vehicle for example a window pane or a sunroof
  • a ventilation device present on the motor vehicle for example a window pane or a sunroof
  • the practical implementation of this invention already fails due to the short duration of the entire process, which, including the outflow process, is completed after only a few 1/10 seconds and within this period of time a conventional actuation of an electric sunroof or window lifter cannot be achieved.
  • the invention is based on the object of designing an occupant protection device of the type mentioned at the outset in such a way that loads on the occupants of the motor vehicle from escaping gases are further reduced.
  • an occupant protection device in which the at least one outflow opening is arranged in an area of the air cushion facing away from the occupant.
  • the outflow opening of a driver's air cushion is arranged outside of the arms or palms of the hands in order to prevent an increased thermal load or even a reflex-like release of the steering wheel.
  • Another particularly advantageous embodiment of the present invention is achieved when the outflow opening faces a rear region of the occupant protection device.
  • the hot gases pass through the outflow openings into an area of the occupant protection device which is inaccessible to the occupant, so that there is no risk of injury to the occupant.
  • the occupant protection device is equipped with a heat-resistant surface, so that damage to the occupant protection device, for example due to possible ignition, which could result in a new source of danger, is also ruled out.
  • the occupant protection device is arranged in a container into which the gas can be introduced through the outflow opening.
  • This gets the Gas through the outflow openings in the container, which can be closed off from the interior of the motor vehicle.
  • this can also be designed to be deformable in order to be able to accommodate the comparatively large gas volume.
  • the gas can escape from the container automatically after a cooling phase, so that an additional manual intervention is not necessary. In this way, a better retention effect can also be achieved, for example by a longer service life of the air cushion during an impact.
  • an expansion chamber is created by a targeted design of the container, so as to reduce the aggressiveness of the air cushion and thereby transmit the forces transmitted to the occupants in an accident without dangerous impact impacts.
  • the occupant protection device is designed as a module that is independent of the arrangement in the motor vehicle. This considerably simplifies the practical use of the occupant protection device in that the occupant protection device is independent of further control elements or ventilation elements and thus enables individual use in the motor vehicle. Therefore, the occupant protection device is also suitable for areas of application which involve unfavorable spatial conditions or for retrofitting existing motor vehicles.
  • the outflow opening is arranged on the air cushion in such a way that it can be moved into an area facing away from it by the impact of the occupant.
  • the outflow opening is moved by the impact into a rear region of the occupant protection device in accordance with the forward displacement of the occupant. Therefore, the gas can initially escape through the outflow opening with only a slight forward displacement into the interior, contact with the occupant being excluded. Only with increasing forward displacement of the occupant is the outflow opening moved in the direction of the forward displacement into the container of the occupant protection device, so that an increased load from escaping warm gases is excluded.
  • the occupant protection device is designed as a closed system, so that the expansion gases which arise are essentially complete to be caught.
  • the occupant protection device is sealed off from the interior of the motor vehicle, thereby preventing hot gases from escaping.
  • the gases could, for example, pass through the outflow openings into a second air cushion, which only fills when the first air cushion begins to be emptied.
  • the air cushion can also be used to catch the occupant in two stages, for example.
  • An embodiment of the present invention is also particularly expedient, in which a plurality of outflow openings are provided, which are closed or opened depending on the accident-related forward displacement of the occupant.
  • the occupant protection device is therefore advantageously largely independent of the installation conditions in the interior of the motor vehicle, with in particular an opening in the motor vehicle outer skin or the connections to existing ventilation systems being unnecessary.
  • Figure 1 is a perspective view of a partially sectioned motor vehicle.
  • FIG. 2 shows a front view of a steering wheel of the motor vehicle shown in FIG. 1;
  • FIG. 3 shows a longitudinal sectional view of the airbag module according to the invention along the line I-1 in FIG. 1;
  • FIG. 4 shows a further cross-sectional view of the gas bag module according to the invention along the line I-1 in FIG. 1.
  • FIG. 1 a partially sectioned motor vehicle 1 is shown in a perspective view.
  • an air cushion 4, 5 intended for occupants 2 and 3, a driver and a front passenger is completely filled. Due to the impact of the occupants 2, 3 on the respective air cushions 4, 5
  • the hot gas generated by a gas generator 7 is pressed out of an outflow opening 8, 9 in order to reduce the impact energy in a manner that is compatible with the body.
  • the outflow openings 8, 9 are arranged in a position facing away from the respective occupant 3 or the driver 2 and thus prevent the occupants 2, 3 from making physical contact with the hot gas.
  • the escaping gas flows into a rear area of a container 10 of the occupant protection device 6, where it is initially collected and exits later, in particular after a predetermined cooling phase.
  • FIG. 2 shows a front view of a steering wheel 11.
  • the steering wheel 11 receives the container 10 intended for the air cushion (not shown here).
  • the arrangement of the outflow opening 8 within the steering wheel 11 can be seen.
  • the gas escapes in the direction of the occupant 2 shown in FIG. 1 and an associated risk to the occupant 2, in contrast to an air cushion known from the prior art , in which the outflow opening is located above the steering wheel, reliably excluded.
  • the gas bag module essentially comprises a module housing 110 with opening flaps 112 attached to it, a gas bag 114 and a gas generator 116 for inflating the gas bag.
  • the gas bag 114 has an injection opening, through which the gas generator 116 extends into the interior of the gas bag 114.
  • a fastening flange 117 on the gas generator serves to clamp the gas bag 114 between the flange 117 and the module housing 110.
  • FIG. 4 shows the gas bag 114 and the gas generator 116 in the region of the injection opening.
  • At least one reinforcing layer 120 made of fabric material is attached to the gas bag wall and surrounds the blowing opening.
  • the reinforcement layer 120 merges in one piece into four tether straps 122 which are fastened to the front part 124 of the gas bag wall when inflated.
  • the gas bag wall and the reinforcement layer 120 have a plurality of outflow openings 128 lying inside the module housing 110, more precisely at the level of the gas generator 116, when the gas bag 114 is unfolded.
  • the reinforcement layer 120 thus not only surrounds them Blowing opening, but also the outflow openings 128.
  • the gas generator 116 has gas outlet openings 130 which, in the unfolded state of the gas bag 114, lie further inside the gas bag module 110 than the outflow openings 128.
  • gas flows into the gas bag 114 from the gas generator 116 via the gas outlet openings 130 and inflates it.
  • the gas bag 114 presses the opening flaps 112 open and unfolds into the vehicle interior via the deployment opening in the direction of the occupant and is available as a restraining means.
  • Part of the hot gas passes through the outflow openings 128 into an annular space 132 between the wall of the gas bag 114 and the peripheral part of the module housing 110. In this space 132, the gas cools and continues to flow into the vehicle interior in the direction of the arrow.
  • the gas pressure rises in the intermediate space 132, as a result of which a counter pressure is built up in relation to the gas which continues to flow out of the gas bag 114.
  • the outflow rate of the gas from the gas bag 114 is therefore not as high as in the case of a gas bag with outflow openings which are arranged outside the module housing 110.
  • a slow decrease in the gas bag internal pressure can be achieved through the outflow openings 118 provided in the module housing 110.
  • the gas bag has an extended service life.
  • Hot particles carried in the gas can also settle in the intermediate space 132. Overall, there is a reduced smoke development.

Abstract

La présente invention concerne un dispositif de protection des occupants d'une automobile (1), comprenant un coussin gonflable de sécurité (4, 5), qui, en cas d'accident, est rempli de gaz de manière explosive. Ainsi, lors d'un déplacement vers l'avant causé par un accident, un occupant (2, 3) vient heurter le coussin gonflable (4, 5) qui est déjà complètement gonflé, le gaz s'échappant alors par un orifice d'évacuation (8, 9). L'énergie de la collision se voit ainsi limitée dans une mesure qui peut être supportée par le corps. Afin de prévenir une exposition thermique des occupants (2, 3) aux gaz d'expansion s'échappant, l'orifice d'évacuation (8, 9) est monté dans une zone du dispositif de protection des occupants (6) qui est opposée à l'occupant (2, 3). Ce dispositif de protection des occupants est notamment monté à l'intérieur d'une boîte fermée (10), qui permet de l'intégrer facilement dans diverses zones de l'automobile (1).
PCT/EP2001/008330 2000-07-25 2001-07-19 Dispositif de protection des occupants WO2002008025A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001279763A AU2001279763A1 (en) 2000-07-25 2001-07-19 Occupant protection device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20012864U DE20012864U1 (de) 2000-07-25 2000-07-25 Gassack-Modul
DE20012864.7 2000-07-25
DE10038298.3 2000-08-05
DE2000138298 DE10038298A1 (de) 2000-08-05 2000-08-05 Insassenschutzvorrichtung

Publications (1)

Publication Number Publication Date
WO2002008025A1 true WO2002008025A1 (fr) 2002-01-31

Family

ID=26006621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/008330 WO2002008025A1 (fr) 2000-07-25 2001-07-19 Dispositif de protection des occupants

Country Status (2)

Country Link
AU (1) AU2001279763A1 (fr)
WO (1) WO2002008025A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131112A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module airbag pour un vehicule automobile
WO2006131110A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module de coussin gonflable de securite
WO2006131111A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module de coussin gonflable de securite

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758133A (en) * 1970-06-04 1973-09-11 Honda Motor Co Ltd Shock absorbing air bag apparatus in a motor car
JPH042543A (ja) * 1990-04-17 1992-01-07 Ikeda Bussan Co Ltd エアバッグ装置
EP0483366A1 (fr) * 1990-04-27 1992-05-06 Daicel Chemical Industries, Ltd. Dispositif protecteur pour chauffeur du type a coussin pneumatique
DE4223775C1 (fr) * 1992-07-18 1993-06-24 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE19640322A1 (de) * 1996-09-19 1998-03-26 Petri Ag Airbagmodul
DE19805063A1 (de) * 1997-02-11 1998-08-20 Volkswagen Ag Sicherheitseinrichtung für Fahrzeuginsassen
US5799974A (en) * 1995-11-24 1998-09-01 Honda Giken Kogyo Kabushiki Kaisha Vehicle air bag system
DE29907607U1 (de) * 1999-04-29 1999-09-30 Trw Repa Gmbh Schutzeinrichtung mit Gassack für Kraftfahrzeug-Insassen
EP0974497A1 (fr) * 1998-05-29 2000-01-26 Takata Corporation Dispositif de coussin gonflable

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758133A (en) * 1970-06-04 1973-09-11 Honda Motor Co Ltd Shock absorbing air bag apparatus in a motor car
JPH042543A (ja) * 1990-04-17 1992-01-07 Ikeda Bussan Co Ltd エアバッグ装置
EP0483366A1 (fr) * 1990-04-27 1992-05-06 Daicel Chemical Industries, Ltd. Dispositif protecteur pour chauffeur du type a coussin pneumatique
DE4223775C1 (fr) * 1992-07-18 1993-06-24 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5799974A (en) * 1995-11-24 1998-09-01 Honda Giken Kogyo Kabushiki Kaisha Vehicle air bag system
DE19640322A1 (de) * 1996-09-19 1998-03-26 Petri Ag Airbagmodul
DE19805063A1 (de) * 1997-02-11 1998-08-20 Volkswagen Ag Sicherheitseinrichtung für Fahrzeuginsassen
EP0974497A1 (fr) * 1998-05-29 2000-01-26 Takata Corporation Dispositif de coussin gonflable
DE29907607U1 (de) * 1999-04-29 1999-09-30 Trw Repa Gmbh Schutzeinrichtung mit Gassack für Kraftfahrzeug-Insassen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 141 (M - 1232) 9 April 1992 (1992-04-09) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131112A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module airbag pour un vehicule automobile
WO2006131110A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module de coussin gonflable de securite
WO2006131111A1 (fr) * 2005-06-10 2006-12-14 Takata-Petri Ag Module de coussin gonflable de securite
EP1995127A2 (fr) * 2005-06-10 2008-11-26 Takata-Petri AG Module d'airbag
JP2008542114A (ja) * 2005-06-10 2008-11-27 タカタ・ペトリ アーゲー エアバッグ・モジュール
US7478831B2 (en) 2005-06-10 2009-01-20 Takata-Petri Ag Airbag module for a motor vehicle
US7513527B2 (en) 2005-06-10 2009-04-07 Takata-Petri Ag Airbag module
EP1995127A3 (fr) * 2005-06-10 2009-04-08 Takata-Petri AG Module d'airbag
US7635147B2 (en) 2005-06-10 2009-12-22 Takata-Petri Ag Airbag module
JP4757913B2 (ja) * 2005-06-10 2011-08-24 タカタ・ペトリ アーゲー エアバッグ・モジュール

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Publication number Publication date
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