WO2000046077A1 - Ensemble coussin gonflable de securite - Google Patents

Ensemble coussin gonflable de securite Download PDF

Info

Publication number
WO2000046077A1
WO2000046077A1 PCT/DE2000/000247 DE0000247W WO0046077A1 WO 2000046077 A1 WO2000046077 A1 WO 2000046077A1 DE 0000247 W DE0000247 W DE 0000247W WO 0046077 A1 WO0046077 A1 WO 0046077A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
occupant
airbag unit
housing
gas bag
Prior art date
Application number
PCT/DE2000/000247
Other languages
German (de)
English (en)
Inventor
Carsten Haase
Original Assignee
Petri 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 Petri Ag filed Critical Petri Ag
Publication of WO2000046077A1 publication Critical patent/WO2000046077A1/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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • B60R21/21656—Steering wheel covers or similar cup-shaped covers
    • 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
    • B60R2021/162—Means for diverting, destroying or blocking the bag in case of dangerous deployment, e.g. during rescue operations or use of rear-facing children seats

Definitions

  • the invention relates to an airbag unit, in particular for a motor vehicle, according to the preamble of claim 1.
  • Airbag units serve to ensure the safety of a vehicle occupant in the event of a crash in that, after the crash has been detected, a gas bag is inflated by a suitable sensor using a gas generator within a very short time.
  • the airbag thus forms a protective cushion between the occupant and a vehicle part, such as the steering wheel, dashboard or side door.
  • the gas bag is deployed by an occupant who is not in the normal sitting position in the event of a crash, but e.g. bends forward, not only to failure of the protective function but also to serious injuries to the occupant.
  • the airbag is usually folded up in the idle state and hidden under a cover which must be opened by the airbag when it is deployed. To ensure that the airbag inflates sufficiently quickly, considerable forces are exerted by the airbag unfolding. If the occupant is now in the immediate vicinity of the cover during deployment, he is undesirably shot through the cover and / or the gas bag itself. In order to avoid injuries to occupants who are not in their normal sitting position (out of position, oop) at the moment of a crash, various measures have already been proposed for airbag units.
  • DE 41 21 659 AI discloses an impact protection device for vehicle occupants, in which a lobed or bubble-shaped cover is provided above the gas generator in the airbag as heat protection and for controlling the airbag deployment.
  • the reaction gases can enter the airbag laterally and / or in the direction of the occupant through appropriately dimensioned openings in the cover, as a result of which the airbag primarily expands laterally during the deployment process or its rate of propagation in the occupant direction is reduced. This slows down the expansion of the airbag in the direction of the occupant, so that the risk of contact between the occupant and the airbag is reduced during the deployment phase.
  • DE 197 33 599 describes a device for protecting a vehicle occupant outside the normal position (oop case) in a crash case using an airbag module with an airbag, a gas generator and a diffuser, at least partially between the compressed gas source and the airbag Flame protection is provided, in which at least one flame protection band unfolding with the gas bag is provided in the gas bag and the flame protection band has at least one opening for the passage of the gas emerging from the gas generator in the direction of a flame protection-free point of the gas bag. points, so that at this point in the gas bag through the hot compressed gas, an additional opening for an increased gas outlet in the oop case is generated.
  • a steering wheel and airbag arrangement is known from WO 98/22312, which comprises the following: a steering wheel with a hub and a ring, which are connected to one another by spokes, and an airbag module mounted on the hub with a cover, the one has a substantially flat upper surface in which a plurality of first flap regions are provided.
  • the cover further comprises substantially vertical side parts which are arranged vertically to the upper surface and in which second flap areas are provided.
  • the flap areas can be moved from a closed to an open state when the gas bag unfolds.
  • the arrangement of the first and second flap areas is intended to achieve an early deployment of the gas bag in the lateral direction.
  • a housing with a chamber for receiving a folded airbag which has a main flap that almost completely covers a main opening of the housing, through which the airbag extends towards the chest and head of an occupant can unfold, as well as approximately vertically arranged side flaps, which cover openings pointing downward with respect to the main direction of deployment, through which the airbag extends in the direction of the abdomen and Can stretch the occupant's thigh.
  • the secondary flaps can either be hinged to the housing or attached to the main flap.
  • the airbag can expand partially through the openings exposed by the secondary flaps, so that the Pressure on the main flap is reduced.
  • the present invention is therefore based on the problem of providing an airbag unit which further reduces the risk of injury to an occupant who is not in the normal sitting position when the airbag unit is deployed.
  • At least one escape opening can be created in the housing of the airbag unit when the gas bag is inflated in order to deploy the gas bag in a direction away from the occupant, the formation of the escape opening being controllable as a function of the position of the occupant.
  • the control of the gas bag outlet makes it possible to decisively limit the shooting of the occupant in an oop case by deflecting the forces occurring when the gas bag is deployed away from the occupant in a direction away from the occupant.
  • the deployment of the gas bag in the direction of the occupant can be completely prevented by correspondingly controlling the formation of the escape opening.
  • the gas bag (at least when the escape opening is fully open) can expand so far through the escape opening that deployment of the gas bag through the first opening in the direction of the occupant is prevented.
  • This can e.g. can be achieved in that the escape opening is arranged and designed such that the gas bag can be fully deployed through it.
  • the airbag should preferably deploy completely through the first opening.
  • the at least one evasive opening is created in order to allow the gas bag to expand through the evasive opening, the cross section of the evasive opening preferably being of the Position of the occupant, in particular depends on the size of the pressure exerted by the occupant in the region of the first opening.
  • the airbag unit does not require any complex control devices, since the gas bag can be controlled by adjusting the force required to create the individual openings for the gas bag.
  • the housing of the airbag unit is designed or means are provided such that the force required to create the first opening, which serves to deploy the gas bag in the direction of the occupant, is smaller than the force required to create the escape opening. If the occupant to be protected is in a normal sitting position in the event of a crash, the airbag deploys through the first opening (which can be generated with less force) between the vehicle part to which it is attached and the occupant.
  • the force required to create the first opening is significantly increased. This increase in force occurs either through the weight of the occupant resting on the first opening or through the force opposing the unfolding of the gas bag by the bent occupant.
  • the force required to create the escape opening is dimensioned such that it is less than the force to be exerted as a result of the action of the occupant to create the first opening.
  • the escape opening is created in the housing in an oop case, and the airbag unfolds at least partially in a different direction than toward the occupant.
  • the generation of the first opening and / or the escape opening via a sensor or the like. can be controlled, which detects the seating position of the occupant.
  • sensors and suitable controls are known per se and will not be described in more detail here.
  • the escape opening is preferably created on the side of the housing of the airbag unit or in a bottom of the housing.
  • the bottom of the housing in the sense of gravity is not necessarily the bottom, but the most most distant area of the housing understood.
  • the invention is not limited to the creation of a single escape opening; in the case of lateral escape openings, it is rather advantageous to provide several, in particular two to five, escape openings.
  • the first opening and / or the escape openings can be provided in the known manner by material weaknesses in the housing of the airbag unit in the form of tear lines.
  • flaps which can be hinged to the housing, for example by means of a hinge.
  • the flaps can be fixed to the housing by means of latching elements, the gas bag unfolding breaking these latching elements away and thus opening the flaps.
  • the latching elements are preferably arranged in the region of the housing base.
  • the airbag unit is designed as a driver airbag module and mounted on a steering wheel.
  • the escape openings are arranged in such a way that the gas bag unfolds wreath only or predominantly behind the steering wheel through the escape openings when the occupant lies directly on the cover.
  • the entire airbag unit can be fastened to a vehicle part in a manner known per se in such a way that even in the event that the gas bag does not deploy at all, part of the impact energy is absorbed by the airbag unit.
  • the airbag unit can do this be attached to the corresponding vehicle part via deformation elements, or the housing of the airbag unit itself can be deformable.
  • Figure 1 - a section through an airbag unit according to the invention in the idle state
  • FIG. 1 Figure la - a detailed view of another airbag unit according to the invention corresponding to FIG. 1;
  • Figure 2 the airbag unit of Figure 1 after the deployment of the gas bag in an oop case.
  • FIG. 3 shows the airbag unit according to FIG. 1 after the airbag has been deployed in the case of an occupant in a normal sitting position
  • FIG. 4 - the airbag unit according to FIG. 1 after the airbag has been deployed in the case of an occupant bent forward.
  • FIG. 1 shows a section through an airbag unit designed as a driver airbag module 1 in a steering wheel 10.
  • the airbag module 1 comprises a housing 2, an airbag 3 and a gas generator 4.
  • the airbag module 1 is fastened to the hub 12 of the steering wheel 10 by means of fastening elements (not shown).
  • the housing 2 simultaneously forms the cover of the airbag module 1, the bottom 13 of the housing 2 carrying the gas generator 4.
  • the gas bag 3 is unfolded through an opening 5 (see FIG. 3) on the occupants 9 in a known manner by means of a tear line 14 in the housing 2.
  • a tear line 14 in the housing 2.
  • FIG. 1 a shows an embodiment of the airbag unit 1 according to the invention in an enlarged view.
  • locking elements 8 are provided here.
  • the tear line 14 for creating the opening 5 can be clearly seen here.
  • FIG. 2 shows the airbag module 1 according to FIG. 1 shortly after the airbag module has been triggered, an occupant 9 resting his chest on his housing 2 while the airbag module 1 is being triggered.
  • FIG. 3 again shows the airbag module according to FIG. 1 after deployment, the occupant 9 being in a normal sitting position here.
  • the gas bag 3 creates an opening 5 when it is deployed, through which it unfolds in the direction of the occupant 9.
  • a lower force is required than for generating the escape openings 7, which, for. B. can be achieved by a different design of the respective tear lines.
  • the escape openings are only activated when the formation of the opening 5 facing the occupant 9 is hindered by a body part of the occupant 9 (corresponding to FIG. 2).
  • the gas bag 3 can fully fulfill its protective function for the occupant 9 in a normal sitting position and prevent it from a hard impact on the steering wheel 10.
  • FIG. 4 shows an airbag unit 1 according to the invention as shown in FIG. 1 shortly after deployment, the occupant leaning forward but not resting on the cover 2.
  • the gas bag 3 first creates the opening 5 in the cover 2 by tearing open the tear line 14 and partially unfolds in the direction of the occupant 9.
  • the force of the gases emerging from the gas generator 4 increases to create the escape opening 7 by means of the tear lines 6 and the further deployment of the gas bag 3 takes place predominantly behind the steering wheel rim 11.
  • the airbag module according to the invention accordingly allows safe protection of the occupant both in the cases in which he occupies a normal sitting position and also when he has moved in the direction of the airbag module into an abnormal position, even without using complicated controls.
  • active control for creating the openings can also be carried out.

Landscapes

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

Abstract

Cette invention concerne un ensemble coussin gonflable de sécurité (1) comprenant un sac à gaz (3), un générateur de gaz (4) et une enceinte (2) contenant le sac à gaz (3). L'enceinte (2) est conçue de sorte que lorsque le sac à gaz (3) se gonfle, une ouverture (5) se forme dans l'enceinte (2), le sac à gaz (3) pouvant se déployer par cette ouverture (5) en direction d'un occupant (9) en position assise. Selon l'invention, l'enceinte (2) est conçue pour que, lorsque le sac à gaz (3) se gonfle, au moins une ouverture de dégagement (7) se forme dans l'enceinte (2), afin que le sac à gaz (3) se déploie dans une direction opposée par rapport à l'occupant (9), la formation de l'ouverture de dégagement (7) étant réglable en fonction de la position de l'occupant (9).
PCT/DE2000/000247 1999-02-01 2000-01-26 Ensemble coussin gonflable de securite WO2000046077A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19905122A DE19905122A1 (de) 1999-02-01 1999-02-01 Airbageinheit mit einer Steuerung des Gassackaustrittes
DE19905122.4 1999-02-01

Publications (1)

Publication Number Publication Date
WO2000046077A1 true WO2000046077A1 (fr) 2000-08-10

Family

ID=7896812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/000247 WO2000046077A1 (fr) 1999-02-01 2000-01-26 Ensemble coussin gonflable de securite

Country Status (2)

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DE (1) DE19905122A1 (fr)
WO (1) WO2000046077A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1131229B1 (fr) * 1999-09-17 2004-04-07 Volkswagen Aktiengesellschaft Systeme de coussin gonflable situe sur le volant d'un vehicule

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370613A1 (fr) * 1988-11-14 1990-05-30 General Motors Corporation Système modulaire de retenue de passagers
DE19648136A1 (de) * 1996-11-21 1998-05-28 Opel Adam Ag Gehäuse mit einer Kammer zur Aufnahme eines zusammengefalteten und aufblasbaren Luftsackes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5560648A (en) * 1995-08-24 1996-10-01 General Motors Corporation Air bag deployment bias apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370613A1 (fr) * 1988-11-14 1990-05-30 General Motors Corporation Système modulaire de retenue de passagers
DE19648136A1 (de) * 1996-11-21 1998-05-28 Opel Adam Ag Gehäuse mit einer Kammer zur Aufnahme eines zusammengefalteten und aufblasbaren Luftsackes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"AIR BAG WITH IMPROVED OCCUPANT PERFORMANCE", RESEARCH DISCLOSURE,GB,INDUSTRIAL OPPORTUNITIES LTD. HAVANT, no. 392, 1 December 1996 (1996-12-01), pages 805, XP000682096, ISSN: 0374-4353 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1131229B1 (fr) * 1999-09-17 2004-04-07 Volkswagen Aktiengesellschaft Systeme de coussin gonflable situe sur le volant d'un vehicule

Also Published As

Publication number Publication date
DE19905122A1 (de) 2000-08-10

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