WO2013127497A1 - Sac gonflable - Google Patents

Sac gonflable Download PDF

Info

Publication number
WO2013127497A1
WO2013127497A1 PCT/EP2013/000473 EP2013000473W WO2013127497A1 WO 2013127497 A1 WO2013127497 A1 WO 2013127497A1 EP 2013000473 W EP2013000473 W EP 2013000473W WO 2013127497 A1 WO2013127497 A1 WO 2013127497A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas bag
central layer
airbag according
outer walls
wall
Prior art date
Application number
PCT/EP2013/000473
Other languages
German (de)
English (en)
Inventor
Christof Werner
Original Assignee
Trw Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trw Automotive Gmbh filed Critical Trw Automotive Gmbh
Publication of WO2013127497A1 publication Critical patent/WO2013127497A1/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
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge
    • 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
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/36—Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
    • 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
    • B60R2021/23316—Inner seams, e.g. creating separate compartments or used as tethering 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
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process

Definitions

  • the invention relates to a gas bag for a vehicle protection system.
  • Gas bags should provide a good retention effect for a person to be protected wherever possible on their surface. This applies in particular to large-area, curtain-like or mattress-shaped gas bags. The catching effect of the gas bag is better when the gas bag is designed to be relatively soft and yielding at the point where the impact occurs.
  • a gas bag for a vehicle protection system having a first and a second, substantially congruent outer wall, wherein a middle layer between the outer walls is arranged and the outer walls connected away from a peripheral attachment of the outer walls alternately in several places with the middle layer are.
  • “Alternating” means that, seen in a sectional view, between two connecting portions of the central layer with the one outer wall is a connecting portion with the other outer wall, that is on a connecting portion with the first outer wall, a connecting portion of the central position with the second outer wall follows and vice versa
  • This design causes the inflated airbag to have a plurality of outwardly arched chambers of relatively large depth on both outer walls, and the arched areas are softer than a smooth, taut outer wall, thus providing an improved catching effect.
  • a distance between two adjacent connecting sections of the first outer wall and the second outer wall with the central layer is preferably longer than half the distance between second adjacent connecting sections on the same outer wall, so that the central layer assumes a zigzag-shaped course in the inflated gas bag.
  • the permanent connections of the middle layer with the outer walls contribute to the shaping of the gas bag in the inflated state throughout the entire time.
  • the first or second outer wall and the middle layer are preferably directly adjacent to one another in the region of the connecting sections, so that there is no distance between the outer wall and the central layer. Since the connecting portions are arranged alternately on opposite sides of the central position with the two outer walls, but preferably a chamber of the second outer wall is opposite to a connecting portion on the first outer wall, so there is no place in the gas bag, in which the depth of the gas bag, so the Distance between the two outer walls, zero would be. This is achieved without expensive spacers.
  • the middle layer is preferably selected to be as long in the longitudinal extent of the gas bag as the two outer walls, but it can also be longer or shorter.
  • the central layer is stretched tight in the inflated state of the gas bag and contributes to the stabilization of the airbag in a person's impact.
  • the complete middle layer is preferably located in the entire gas bag between the outer walls, so that the chambers are formed over the entire surface and the entire longitudinal extent of the gas bag.
  • the middle layer is preferably a fabric layer. It may be prefabricated, for example, from a known gas bag fabric as well as the outer walls, but it is also possible to weave the middle layer together with the outer walls in one step.
  • the middle layer can be fixed to the longitudinal edges at least in its middle section on at least one of the outer walls.
  • the middle layer at the edge over its entire longitudinal extent (with the exception of any areas necessary for gas supply into the gas bag) on one or both outer walls.
  • this can advantageously be fixed at least in sections to the peripheral fastening in order to save working steps.
  • the middle layer is preferably not attached to its outer edges on the outer walls in order to impede the distribution of the filling gas in the gas bag as little as possible.
  • the middle layer has a slightly lower height than the two outer walls. It is also possible to realize the central position of two or more parallel juxtaposed bands, between which a gas flow can take place.
  • the gas bag is preferably formed by the arrangement of the middle layer and its connections to the outer walls so that on opposite sides of the central layer each have a plurality of adjacent, rib-shaped, in the inflated state in particular curved, chambers are provided, wherein the chambers on one side of the central position the chambers are offset on the opposite side of the central position.
  • This structure results from the exterior walls attached alternately to the middle layer. This results in a (with the exception of the two edge regions) serpentine shape of the gas bag when viewed from the side. There are on the surface of the gas bag no areas where the depth of the gas bag is zero, so the two outer walls are simultaneously in direct contact with the central position or each other.
  • the gas bag is relatively soft in the areas formed by the bulges of the chambers, so that an impacting body can easily dip into the gas bag. Due to the forced curvature of the outer walls between the compounds, the compliance of the airbag increases all at the apex of the vault. As a result, an impact at that point is softer than a flat surface. The same effect also occurs when the curvature occurs on the side of the gas bag facing away from the impact, since the curvature of the gas bag resting against the vehicle takes over the interception.
  • the gas bag can be designed so that the depth of the gas bag, ie the distance of the outer walls, over the entire longitudinal extent of the airbag is approximately constant, but the two outer walls follow a curved contour.
  • the chambers preferably adjoin one another on each side of the central layer at the connecting sections, so that the next chamber on the same side of the central layer directly adjoins a chamber.
  • the area with the greatest thickness of the chamber on one side of the central position coincides in each case with one of the connecting portions of the second outer wall with the central position on the opposite side of the central position, ie with the point of the smallest thickness of the respective chamber on the other side of the Central location.
  • the connecting portions may extend substantially over the entire height of the gas bag and preferably perpendicular to its longitudinal extent.
  • the gas bag is divided into a plurality of directly adjacent, parallel, rib-shaped chambers, each extending from an upper edge of the gas bag to a lower edge of the gas bag.
  • the sections in which the outer walls are connected to the central layer are elongated, parallel connecting sections.
  • the connection is preferably a seam or a weave.
  • the chambers are filled, for example, via channels formed between the peripheral fastening and the connections, which allow an inflow of filling gas uniformly into all the chambers at the same time.
  • the connecting portions or the central position itself may be interrupted at certain points in order to allow a gas flow.
  • the connecting portions are preferably arranged at regular intervals, so that all the chambers are substantially equal in width to achieve a uniform retention effect over the surface of the gas bag.
  • a mattress-shaped airbag for arrangement on the outside of the windshield, for example, three to five connecting sections and thus two to four chambers may be provided on each outer wall.
  • the gas bag may preferably each have a chamber whose thickness is approximately equal to or greater than that of the mutually offset chambers provided between the end regions. In this way, a curvature in the outer wall can be produced in the end regions of the gas bag and achieve an improved catching effect. In addition, in this way, the depth of the gas bag can be increased in its end regions relative to a conventional curtain-like airbag.
  • the middle layer is preferably arranged in the direction of its longitudinal extension at the two opposite ends, based on the inflated state of the gas bag, extending obliquely to one of the outer walls, and the ends of the central layer are secured to the outer walls. This arrangement gives each of the ends the shape of a curved chamber.
  • the invention can advantageously be used for curtain-type or mattress-shaped gas bags, for example for use as pedestrian protection, wherein the gas bag is arranged on the outside of the windshield and covers it completely or partially.
  • FIG. 1 is a schematic view of a gas bag according to the invention in the flat-spread state
  • FIG. 2 is a schematic sectional view of an inflated gas bag according to the invention along a line II-II in Figure 1;
  • - Figure 3 is a schematic perspective view of a gas bag according to the invention in the inflated state;
  • FIG. 4 is a schematic perspective partially transparent view of the airbag of Figure 3;
  • FIG. 5 is another schematic, perspective partially transparent view of the airbag of Figure 3;
  • FIG. 6 is a schematic perspective partially sectioned view of a gas bag according to the invention according to a second embodiment
  • FIG. 7 is a schematic perspective partially sectioned side view of the gas bag of Figure 6;
  • FIG. 8 shows a further schematic perspective partially cutaway side view of the gas bag from FIG. 6.
  • Figures 1 and 2 show a gas bag 10 with a curtain-shaped or mattress-like shape spread flat or cut from the side in the inflated state.
  • the gas bag 10 has a first outer wall 12 and a second outer wall 14, which are substantially congruent and are connected together in a gas-tight manner along a peripheral attachment 16 along their circumference, so that a gas-fillable interior is formed.
  • the perimeter fastener 16 may be a seam or weave, as known from conventional gas bags.
  • the longitudinal extent L of the airbag 10 is greater than its vertically measured height h, which in turn is greater than its depth d, measured as the distance of the outer walls 12, 14 in the inflated state of the airbag 10th
  • an injection mouth 18 is formed by both outer walls 12, 14, to which a gas generator (not shown) is connected, which supplies the filling gas for inflating the gas bag 10.
  • a gas generator not shown
  • the gas bag 10 serves to protect a pedestrian and is arranged on the outside of the vehicle so that it covers a windshield or the transition from a hood to the windshield in the inflated state.
  • the fastening extensions 20 and the injection mouth 18 are fastened in the region of the windscreen-side end of the engine compartment. There, the airbag 10 is arranged in the collapsed state.
  • the middle layer 22 consists of a fabric and has substantially the same dimensions as the outer walls 12, 14. It lies practically in the entire interior of the airbag 10 between the outer walls 12, 14 and extends over the entire longitudinal extent L and almost the entire height h ,
  • Each of the outer walls 12, 14 is fixedly and directly connected to the central layer 22 along a plurality of connecting sections 24, so that there is no distance between the respective outer wall 12, 14 and the central layer 22 in the connecting sections 24.
  • the outer walls 12, 14 and the middle layer 22 may each consist of separate fabric blank parts and be connected, for example via seams. However, it would also be conceivable to produce the outer walls 12, 14 and the middle layer 22 integrally by weaving in a single weaving step.
  • the connecting portions 24 of the first outer wall 12 with the central layer 22 and the connecting portions 24 of the second outer wall 14 with the central layer 22 are provided alternately and parallel to each other.
  • the connecting portions 24 of the first outer wall 12 are shown with the central layer 22 with solid and the second outer wall 14 with the central layer 22 with broken lines.
  • all connecting portions 24 are parallel to each other and approximately perpendicular to the longitudinal extent L of the airbag 10.
  • the connecting portions 24 of the second outer wall 14 with the central position 22 are offset from the connecting portions 24 of the first outer wall 12 with the central position 22 by half of the distance k, so that all connecting portions 24 are formed at the central position 22 at equal intervals k / 2.
  • the middle layer 22 is connected in a central portion, here over the entire length of its longitudinal extent, with the peripheral attachment 16 (see for example Figure 4). In the middle layer 22 itself and in the attachment of the central layer 22 with the peripheral attachment 16 gaps are formed in this example, which allow the gas flow and the gas distribution in the interior of the airbag 10.
  • the middle layer 22 and the connecting portions 24 of the inflated airbag is divided into a series of chambers 30 which are fluidly connected to each other.
  • the chambers 30 are each rib-shaped and curved in the inflated state. All chambers 30 are arranged parallel to each other. In the example shown, three chambers 30 are provided on the first outer wall side 12 and two chambers 30 on the side of the second outer wall 14.
  • the inflated airbag 10 thereby becomes a serpentine shape (see, e.g., Fig. 3).
  • the mid-ply 22 is tautened and assumes a zig-zag shape (see, e.g., Figures 5 and 7).
  • the bounded by opposite slopes of the central layer 22 chambers 30 therefore have a wedge shape in section. If the middle layer 22 is short enough, it can also be substantially flat due to the pressure in the gas bag (see FIG. 2).
  • the shape of the gas bag 10 also causes a distance a M (along the center layer 22) between two adjacent connecting portions 24 of the first outer wall 12 and the second outer wall 14 with the central layer 22 (see FIG. 5) is longer than half the distance a A of two adjacent connecting sections 24 on the same outer wall 12, 14 (see FIG. 6).
  • the depth d of the gas bag 10 corresponding to the distance of the outer walls 12, 14 is never zero due to the offset of the connecting portions 24, since no locations are formed at which the two outer walls 14, 12 and the middle layer 22 lie directly on each other.
  • the central layer 22 extends obliquely through the interior of the airbag 10 and is connected in each case on the surface of one of the outer walls 12, 14 with this.
  • the central layer 22 is connected at its one end 34 with the first outer wall 12 in the connecting portion 24 '.
  • the middle layer 22 is connected at its other end 34 with the second outer wall 14 in the connecting portion 24 '.
  • the chambers formed at the end portions 32 are thicker than the chambers 30 on the surface of the airbag 10. This leads to a good collection and retention, if a person on the end portion 32 of the airbag 10th incident.
  • FIGS. 6 to 8 show a second embodiment of the gas bag 10.
  • the central layer 22 is not connected to the outer walls 12, 14 at the edge, but extends away from the connecting sections 24, 24 'freely in the gas bag 10.
  • the connecting sections 24, 24 'freely in the gas bag 10. take the portions of the central layer 22 between two adjacent connecting portions 24 a in Essentially flat shape.
  • the middle layer 22 could also be realized by a plurality of narrow bands parallel in the longitudinal direction L, between which intermediate spaces are formed which allow a gas flow between the clamps 30.

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

Abstract

L'invention concerne un sac gonflable pour un système de protection de véhicule comprenant une première et une deuxième parois extérieures (12, 14) sensiblement coïncidentes, et une couche centrale, qui est disposée entre les parois extérieures (12, 14). Les parois extérieures (12, 14) sont, en retrait d'une fixation circonférentielle (16) des parois extérieures (12, 14), alternativement solidarisées à demeure avec la couche centrale (22) en plusieurs endroits.
PCT/EP2013/000473 2012-02-28 2013-02-19 Sac gonflable WO2013127497A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210003746 DE102012003746A1 (de) 2012-02-28 2012-02-28 Gassack
DE102012003746.5 2012-02-28

Publications (1)

Publication Number Publication Date
WO2013127497A1 true WO2013127497A1 (fr) 2013-09-06

Family

ID=47845896

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/000473 WO2013127497A1 (fr) 2012-02-28 2013-02-19 Sac gonflable

Country Status (2)

Country Link
DE (1) DE102012003746A1 (fr)
WO (1) WO2013127497A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2958775B1 (fr) * 2013-02-20 2018-10-24 Autoliv Development AB Dispositif d'airbag avec gonflement dirigé
KR101500232B1 (ko) * 2013-12-19 2015-03-06 현대자동차주식회사 보행자에어백 쿠션
FR3065929B1 (fr) * 2017-05-05 2021-01-08 Paul Philippe Cord Systeme de protection des personnes et des biens comprenant une structure gonflable a longue duree d’action
KR20230104911A (ko) * 2020-11-10 2023-07-11 아우토리브 디벨롭먼트 아베 팽창가능 에어백
CN112776746B (zh) * 2021-01-28 2022-07-26 浙江吉利控股集团有限公司 一种行人保护系统及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10220364A1 (de) * 2002-05-07 2003-12-04 Delphi Tech Inc Sicherheitseinrichtung
EP1477372A1 (fr) * 2003-05-14 2004-11-17 Delphi Technologies, Inc. Dispositif de sécurité
WO2009070059A1 (fr) * 2007-11-28 2009-06-04 Autoliv Development Ab Dispositif de coussin de sécurité gonflable de protection des piétons et procédé de pliage et de rangement d'un dispositif de coussin de sécurité gonflable de protection des piétons

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10220364A1 (de) * 2002-05-07 2003-12-04 Delphi Tech Inc Sicherheitseinrichtung
EP1477372A1 (fr) * 2003-05-14 2004-11-17 Delphi Technologies, Inc. Dispositif de sécurité
WO2009070059A1 (fr) * 2007-11-28 2009-06-04 Autoliv Development Ab Dispositif de coussin de sécurité gonflable de protection des piétons et procédé de pliage et de rangement d'un dispositif de coussin de sécurité gonflable de protection des piétons

Also Published As

Publication number Publication date
DE102012003746A1 (de) 2013-08-29

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