WO2023030803A1 - Volant comprenant un coussin de sécurité gonflable - Google Patents

Volant comprenant un coussin de sécurité gonflable Download PDF

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Publication number
WO2023030803A1
WO2023030803A1 PCT/EP2022/071638 EP2022071638W WO2023030803A1 WO 2023030803 A1 WO2023030803 A1 WO 2023030803A1 EP 2022071638 W EP2022071638 W EP 2022071638W WO 2023030803 A1 WO2023030803 A1 WO 2023030803A1
Authority
WO
WIPO (PCT)
Prior art keywords
steering wheel
clock position
chamber
retention chamber
gas bag
Prior art date
Application number
PCT/EP2022/071638
Other languages
German (de)
English (en)
Inventor
Bartolomeu FRANCO
Johannes Morhart
João Duarte AMORIM CORREIA
Original Assignee
ZF Automotive Safety Germany GmbH
Safelife Industria de Componentes de Seguranca Automovel S.A.
Dalphi Metal Espana, S.A.
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 ZF Automotive Safety Germany GmbH, Safelife Industria de Componentes de Seguranca Automovel S.A., Dalphi Metal Espana, S.A. filed Critical ZF Automotive Safety Germany GmbH
Publication of WO2023030803A1 publication Critical patent/WO2023030803A1/fr

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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
    • B60R21/2334—Expansion control features
    • B60R21/2342—Tear seams
    • 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
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns

Definitions

  • the invention relates to a steering wheel of a vehicle with an airbag.
  • a flap of the gas bag module opens at the top of the steering wheel, so that the gas bag emerges from the steering wheel hub with an exit direction parallel to the axis of rotation of the steering wheel. From this point, the airbag can spread unhindered and quickly over the steering wheel rim.
  • a steering wheel that has a steering wheel rim and a gas bag module that is accommodated in a hub area of the steering wheel and that includes a gas bag, with an outlet opening of the gas bag module being in a position different from an upper side of the steering wheel and below the steering wheel rim, and the gas bag module being so is arranged that the airbag unfolds through a free space between the hub area and the steering wheel rim to the top of the steering wheel.
  • the gas bag includes a cushion-shaped restraint chamber, which in the fully inflated state Steering wheel rim covers the occupant side, with the steering wheel in a straight position, an upper end of the restraint chamber is at a 12 o'clock position and a lower end of the restraint chamber is at a 6 o'clock position, and the restraint chamber includes a front and a rear wall that is in front Beginning of inflation are connected by two tear seams, each extending from a first end to a second end, which limit the initial fill volume of the containment chamber by tearing lateral portions of the containment chamber at the 3 o'clock and 9 o'clock positions -position, and which are designed to open during inflation so that the entire volume of the containment chamber is inflated.
  • the deployment of the restraint chamber accelerates towards the 12 o'clock and 6 o'clock positions, so that the steering wheel rim is quickly covered in the area directly in front of the vehicle driver.
  • the tear seams separate, for example, 10% to 20% of the total volume of the restraint chamber on each side of the gas bag.
  • the first ends of the tear seams are near the top and the second ends are near the bottom of the containment chamber.
  • the tear seams run from top to bottom (relative to the straight-ahead position of the steering wheel and the inflated condition prior to tearing the tear seams) and help direct the inflation gas to the top and bottom of the containment chamber.
  • the tear seams can run parallel to one another. For example, they have a maximum distance from the peripheral edge of the retention chamber of about 100 mm, with a diameter of the retention chamber of about 700 mm.
  • the tear seams are arranged parallel to an imaginary center line of the containment chamber running from the 12 o'clock position to the 6 o'clock position.
  • the two tear seams in the area of the 3 o'clock position and the 9 o'clock position are radial lie within the steering wheel rim.
  • the steering wheel 10 is always shown in its neutral straight-ahead position, which is a 12 o'clock position in the figures above, a 6 o'clock position in the figures below, a 3 o'clock position on the right and a 9 o'clock position position is on the left (indicated in Figure 1). All directions refer to this straight-ahead position.
  • the gas bag module 18 has an outlet opening 30 which is closed by a flap (not shown) and whose surface normal is oriented approximately perpendicularly to the axis of rotation R and, in this example, in the direction of the 12 o'clock position.
  • An exit direction A of the gas bag 26 from the gas bag module 18 coincides with this surface normal, so that the gas bag 26 emerges from the gas bag module 18 below the level of the steering wheel rim 16 .
  • This is sketched in Figure 3, for example.
  • FIGS. 24 and 25 show the steering wheel 10 with the gas bag 26 completely filled, in a rear view.
  • the gas bag 26 consists of a cushion-shaped restraint chamber 32 and an arcuate connecting chamber 34 attached to it on the back, which connects the restraint chamber 32 to the gas generator 24.
  • the connecting chamber 34 has a significantly smaller volume than the restraint chamber 32, for example less than 25% of the volume of the restraint chamber 32, and is used exclusively to position and support the restraint chamber 32, while the restraint chamber 32 provides the actual restraint effect for the vehicle occupant who is on the Gas bag 26 strikes, provides.
  • the connecting chamber 34 attaches with a peripheral edge 36 of an injection opening 37 to the edge 38 of an injection mouth 40 of the retention chamber 32 (see, for example, FIGS. 18 and 25). From there, the connecting chamber 34 extends into the gas bag module 18, where the connecting chamber 34 is connected directly to the gas generator 24 via an inlet opening 42 (see, for example, FIG. 19).
  • the restraint chamber 32 corresponds in shape and structure to a classic cushion-shaped steering wheel airbag.
  • the contour of a peripheral edge 44 on the outer circumference of the retention chamber 32 corresponds to the contour of the steering wheel rim 16 and is therefore chosen to be circular here. In the completely filled state, the peripheral edge 44 protrudes radially beyond the steering wheel rim 16 .
  • the restraint chamber 32 In its initial state prior to commencement of deployment, the restraint chamber 32 has two tear seams 46 (see Figure 18) connecting a front, occupant-side wall 48 and a rear, steering wheel-side wall 50 of the restraint chamber 32 together.
  • Figure 18 shows the retention chamber 32 in a plan view of the front wall 48.
  • the two tear seams 46 limit the initial filling volume of the gas bag 26, more precisely of the restraint chamber 32, by preventing or at least significantly reducing gas flow from the inflation mouth 40 into the edge sections between the tear seam 46 and the respective section of the peripheral edge 44.
  • the two tear seams 46 here run parallel to an imaginary center line M of the retention chamber 32, which runs from the 12 o'clock position to the 6 o'clock position, so that gas flowing through the injection mouth 40 into the retention chamber 32 moves to the 12 o'clock position and to the 6 o'clock position but not to the 3 o'clock and 9 o'clock positions. Consequently, the gas bag 26 is initially narrower when inflated than when it is fully inflated.
  • the maximum distance di to the peripheral edge 44 is, for example, about 100 mm, so that, for example, initially 10% to 20% of the total volume of the retention chamber 32 is separated on each side.
  • a diameter of the retention chamber 32 from peripheral edge 44 to peripheral edge 44 is, for example, 700 mm.
  • both tear seams 46 are guided up to the peripheral edge 44 here.
  • a distance d 2 is left open to the peripheral edge 44 through which gas can overflow into the partitioned area.
  • the tear seams 46 are gradually loosened in the course of filling, so that when the Gas bag 26, the walls 48, 50 only rest on top of each other at the peripheral edge 44, but no longer in the area of the tear seams 46.
  • the tear seams 46 in the area of the second end 54 are made with a thicker thread than in the area of the first end 52, or generally speaking, the tear resistance at the second end 54 is higher than at the first end 52. This means that the tear seams 46 towards the 12 o'clock position tear faster with increasing filling, since the force on the tear seams 46 increases with increasing internal pressure.
  • blow-in mouth 40 is shifted a little from a center MM in the direction of the 12 o'clock position in relation to the center line M, so that a center ME of the blow-in mouth 40 is between the center MM of the center line M and the peripheral edge 44 at the 12 o'clock position.
  • the displacement is, for example, about 10% of the diameter of the retention chamber 32.
  • Figures 2 to 17 show the unfolding process of the gas bag 26 up to the fully inflated state (see Figures 16 and 17).
  • the restraint chamber 32 since the gas bag 26 exits from the gas bag module 18 below the level of the steering wheel rim 16 at a right angle to the axis of rotation R, but in the fully filled state the restraint chamber 32 lies in front of the steering wheel rim 16 on the occupant side as usual and completely covers it, the restraint chamber 32 must Steering wheel rim 16 happen in the course of development.
  • the connecting chamber 34 Due to the shape of the connecting chamber 34 predetermined by its cutting, the latter curves towards the steering wheel rim 16 .
  • the gas bag package 28 After exiting through the exit opening 30 , the gas bag package 28 is deflected through 90° by the connecting chamber 34 that is unfolding and being filled and is pushed through the free space 22 between the hub region 12 and the steering wheel rim 16 .
  • the upper area of the restraint chamber fills up first in this example 32, as shown in Figures 6 and 7.
  • the containment chamber 32 also deploys toward the 6 o'clock position until maximum expansion of the containment chamber 32 is achieved at both the 12 o'clock and 6 o'clock positions. This is shown in FIGS. 8 to 11.
  • the two tear seams 46 are still essentially intact.
  • FIGS. 19, 20 and 21 show blanks 56 which consist of only a single blank part 58.
  • the cut part 58 has a plurality of indentations 60 in each case, four in the examples in Figures 19 and 20 and three in the example in Figure 21.
  • a single inlet opening 42 is arranged on the surface of the cut part 58, which, as described above, is connected to the gas generator 24 connected is.
  • fastening openings are distributed around the edge of the inlet opening 42 , which enable the connection chamber 34 to be fastened directly to the gas generator 24 .
  • the remaining, essentially rectangular blank 58 forms a shaft with an approximately constant cross section, so that in addition to good gas conduction, a good supporting effect of the unfolding retention chamber 32 is also achieved.
  • the injection mouth 40 is offset relative to the inlet opening 42 along the center line M, so that these two openings do not overlap.
  • This curved shape forces a deflection of the gas flow, which in turn helps to deflect the airbag package 28 and convey it through the free space 22 to the other side of the steering wheel rim 16 .
  • This first folding step is shown in Figures 28-35. As can be seen in Figure 35, the two curled sections do not overlap each other.
  • the resulting intermediate package 68 (see FIG. 34) is now, as shown in FIGS. 36 to 45, rolled up along the center line M from the 12 o'clock position and from the 6 o'clock position.
  • the airbag package 28 it is conceivable for the airbag package 28 to be additionally fixed, with the fixation containing a weakened zone which opens as soon as the airbag package 28 has passed through the steering wheel rim 16 (not shown).
  • the resulting intermediate package 68 is then rolled up from the two ends or folded in a Z-fold.
  • any suitable combination of different methods for example rolling and Z-folding, can also be carried out.
  • the airbag package 28 first unfolds in the direction of the 12 o'clock position and to the 6 o'clock position and only then to the 3 o'clock and 9 o'clock positions.
  • the connecting chamber 34 ensures the correct positioning of the airbag package 28 before it is deployed above the steering wheel rim 16.

Landscapes

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

Abstract

L'invention concerne un volant comprenant une jante de volant et un coussin de sécurité gonflable (26), le coussin de sécurité gonflable (26) débouchant au niveau d'une position autre qu'un côté supérieur du volant (10) et se déployant à travers un espace libre entre la région de moyeu et la jante de volant vers le côté supérieur du volant. Le coussin de sécurité gonflable (26) comprend une chambre de rétention en forme d'oreiller (32) qui, lorsqu'elle est complètement remplie, recouvre la jante de volant du côté passager. Lorsque le volant se trouve dans une position de marche en ligne droite, une extrémité supérieure (53) de la chambre de rétention (32) se trouve à une position à 12 heures et une extrémité inférieure (55) de la chambre de rétention (32) se trouve à une position à 6 heures. La chambre de rétention (32) comprend une paroi avant et une paroi arrière qui sont jointes avant le début du remplissage par deux coutures déchirables (46) qui s'étendent chacune d'une première extrémité (52) à une seconde extrémité (54) et qui définissent le volume de remplissage initial de la chambre de rétention (32) en séparant les parties latérales de la chambre de rétention (32) dans la région de la position à 3 heures et de la position à 9 heures, et qui sont conçues pour s'ouvrir au cours du remplissage de sorte que l'ensemble du volume de la chambre de rétention (32) est rempli.
PCT/EP2022/071638 2021-09-03 2022-08-02 Volant comprenant un coussin de sécurité gonflable WO2023030803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021122900.6 2021-09-03
DE102021122900.6A DE102021122900A1 (de) 2021-09-03 2021-09-03 Lenkrad mit einem gassack

Publications (1)

Publication Number Publication Date
WO2023030803A1 true WO2023030803A1 (fr) 2023-03-09

Family

ID=83149055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/071638 WO2023030803A1 (fr) 2021-09-03 2022-08-02 Volant comprenant un coussin de sécurité gonflable

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DE (1) DE102021122900A1 (fr)
WO (1) WO2023030803A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11993220B2 (en) * 2020-09-01 2024-05-28 Autoliv Development Ab Driverseat airbag device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320914A (en) * 1997-01-06 1998-07-08 Alliedsignal Deutschland Gmbh Airbag with stitch lines
EP1211145A1 (fr) * 2000-11-25 2002-06-05 Volkswagen Aktiengesellschaft Coussin gonflable dans un volant pour un véhicule
JP2008105624A (ja) * 2006-10-27 2008-05-08 Autoliv Development Ab エアバッグ装置
WO2011087160A1 (fr) * 2010-01-12 2011-07-21 Autoliv Development Ab Module de coussin de sécurité gonflable
DE102014116333A1 (de) * 2014-11-10 2016-05-12 Autoliv Development Ab Airbagmodul für ein Lastkraftfahrzeug mit einem eine Entfaltungsrichtung vorgebenden Kanal aufweisenden Gassack
WO2019048292A1 (fr) * 2017-09-08 2019-03-14 Trw Automotive Safety Systems Gmbh Module de coussin gonflable de sécurité de volant de direction, module d'information de volant de direction, volant de direction ainsi que procédé de déploiement d'un coussin gonflable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951029A1 (de) 1999-09-17 2001-03-22 Volkswagen Ag Airbageinrichtung an einem Lenkrad eines Fahrzeugs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320914A (en) * 1997-01-06 1998-07-08 Alliedsignal Deutschland Gmbh Airbag with stitch lines
EP1211145A1 (fr) * 2000-11-25 2002-06-05 Volkswagen Aktiengesellschaft Coussin gonflable dans un volant pour un véhicule
JP2008105624A (ja) * 2006-10-27 2008-05-08 Autoliv Development Ab エアバッグ装置
WO2011087160A1 (fr) * 2010-01-12 2011-07-21 Autoliv Development Ab Module de coussin de sécurité gonflable
DE102014116333A1 (de) * 2014-11-10 2016-05-12 Autoliv Development Ab Airbagmodul für ein Lastkraftfahrzeug mit einem eine Entfaltungsrichtung vorgebenden Kanal aufweisenden Gassack
WO2019048292A1 (fr) * 2017-09-08 2019-03-14 Trw Automotive Safety Systems Gmbh Module de coussin gonflable de sécurité de volant de direction, module d'information de volant de direction, volant de direction ainsi que procédé de déploiement d'un coussin gonflable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11993220B2 (en) * 2020-09-01 2024-05-28 Autoliv Development Ab Driverseat airbag device

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Publication number Publication date
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