WO2010054754A1 - Luftsack mit kanalförmigem verschlusselement - Google Patents
Luftsack mit kanalförmigem verschlusselement Download PDFInfo
- Publication number
- WO2010054754A1 WO2010054754A1 PCT/EP2009/007792 EP2009007792W WO2010054754A1 WO 2010054754 A1 WO2010054754 A1 WO 2010054754A1 EP 2009007792 W EP2009007792 W EP 2009007792W WO 2010054754 A1 WO2010054754 A1 WO 2010054754A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- closure element
- airbag
- opening
- air
- flow
- Prior art date
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
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23115—Inflatable members characterised by their shape, construction or spatial configuration with inflatable support compartments creating an internal suction volume
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
Definitions
- the invention relates to an airbag with a shell, which has at least one opening, and a closure element, which is arranged on the at least one opening, in order to prevent at least partially a flow of air from one direction.
- the present invention also relates to an airbag for a vehicle having such an airbag.
- airbags From the mass production of passenger cars restraint systems in the form of airbags in multiple versions are known. These airbags generally have a containment limited retention volume which is enlargeable from a storage position to a retention position. The usually folded in the storage position airbag is pyrotechnically filled with gas upon detection of an accident so that it unfolds abruptly on the displaced occupant and thus contributes at least indirectly to its retention.
- a so-called "support structure airbag” is known in each case from DE 10 2006 038 125 A1 and from DE 10 2006 038 124 A1
- the support structure is movable by means of a gas flow from a storage position into a retention position by a plurality of interconnected,
- ambient air flows through the airflow openings into the interior of the airbag and when the vehicle occupant is restrained the air flows out through the air flow openings outwards.Apart from air flow openings, which are concealed by the occupant even during the impact, the air is discharged at the same speed as the inflow.
- the object of the present invention is therefore to be able to ensure the retention function of a so-called "support structure airbag" targeted by simple means.
- an airbag with a shell, which has at least one opening, and a closure element, which is arranged on the at least one opening to at least partially prevent a flow of air from a first direction, wherein the Closure element is flexible and has at least when flowing through air from one of the first direction opposite second direction channel-shaped configuration.
- the flexible closure element which is channel-shaped when flowing through air, in a simple manner and reliably ensures a closing function, so that the restraint or for damping the air can be limited blown off.
- an airbag can be provided with flow openings on the airbag surface.
- one flexible hose is attached to one or more of the through-flow openings. Of the Hose is not attached and free at the other end. This allows gas to flow through the opening in the direction of the free end largely unhindered. With a gas flow in the reverse direction, the tube or parts of it overturn in such a way that the opening is at least partially closed.
- the closure element in the flow-through state parallel (as in the example just mentioned) or adjacent boundary walls.
- Such trained flexible boundary walls ensure with great certainty that they lie against each other when flowing from the outside or at least partially move the opening.
- the main flow direction of the closure element may significantly differ when flowing air in the second direction from an angle perpendicular to the surface defined by the opening. As a result, a certain deflection of the gas flow in the inflow can be achieved.
- closure elements on one side, the opening of the shell is attached to the shell. This air or gas flows selectively through the opening and then through the channel-shaped closure element.
- closure element may have a plurality of air-permeable recesses in addition to the two end-side main flow openings. These recesses can serve on the one hand to reduce the flow resistance and on the other hand for targeted juxtaposition of the boundary walls of the closure element.
- closure element may be flat in the non-perfused state and have a recess which is significantly smaller than the opening of the shell. This makes it easier to fold the airbag and prevent sticking of the closure elements.
- the closure element may also have a helical pre-orientation, so that it is tubular in the wound state and disk-shaped in the screwed-in state. This helical preorientation can be used to make the closure element in the non-perfused state folds flat by itself.
- the opening is covered by an air-permeable, flat structure.
- the flat structure may be a network. It prevents the closure element from passing through the opening at high pressure to the other side of the shell.
- a release agent or binder is applied to the closure element. These promote or prevent that the boundary walls of the closure element separate again after mutual contact.
- an airbag for a vehicle is equipped with an airbag described above.
- FIG. 1 shows a support structure airbag in a perspective view
- FIG. 3 shows a cross section through the closure element of Fig. 2.
- Fig. 5 is a perspective view and a section of another
- FIG. 6 shows views of a closure element with preorientation
- Fig. 7 is a flat closure element according to a first embodiment and Fig. 8 is a flat closure element according to a second embodiment.
- the starting point of the present invention or of the exemplary embodiments are the so-called “support structure airbags” as a restraint system, which are decisive for the deployment and the retention function, inter alia, the number, size and position of inflow and outflow openings.
- Fig. 1 shows a support structure airbag 1 in one of its fully deployed retention position. It comprises a support structure 2, which is provided by a plurality of interconnected, a channel system 3 forming hollow bodies 4.
- the hollow bodies 4 are designed as tube-like tubular bodies, which are connected to one another in a truss-like or framework-like channel system 3.
- the hollow body 4 in this case consist of a flexible, gas-filled tubing.
- each compartment 5 of the support structure 2 are created, which are filled by surface elements.
- These surface elements 6 are made of a flexible material, such as a cloth or rubber material. Overall, the surface elements 6 form an airbag or a covering 7, by which a retaining volume enclosed by the support structure 2 is enclosed.
- the sheaths or surface elements have openings 10 for the inflow and optionally for the at least partial outflow of ambient air.
- FIG. 2 shows a closure element which can be attached to an opening 10 of the airbag or airbag 7. Depending on requirements, such a closure element is arranged on all or only on individual of these openings 10. In the left half of Fig. 2, the closure element is shown in the flow-through state.
- the shell 11 has an opening 12. The upper side shown in the figure corresponds to the outside of the airbag or airbag. On the bottom is flush with the opening 12, a tubular closure element 13 is attached.
- the tubular closure element 13 is thus connected at one end face tightly with the shell 11, so that gas, when flowing from the top to the bottom, flows through the opening 12 into the tubular closure element 13, which flows in the flow-through case (see flow arrows 14 ) has a channel-like shape.
- the case shown on the left in Fig. 2 shows the state of the inflow of air into the airbag.
- the airbag In the restraint state, the airbag is under pressure against the environment, so that gas or air wants to flow to the outside. This flow direction is shown by an arrow 15 in the right-hand illustration of FIG. 2.
- the tubular closure element since the tubular closure element is very soft and flexible, it collapses on the underside of the shell 11 when there is no more flow from top to bottom or outside to inside. A gas flow from bottom to top is thus prevented or reduced by the closure element 13.
- FIG. 3 again shows a cross section through the closure element 13 in the flow-through state (left) and when the closure element 13 is applied to the shell 11 or to a net 16 when the flow direction is reversed (right).
- the inside of the airbag is at the top and the outside of the airbag at the bottom. If air flows from outside to inside (picture left), then the tubular closure element 13 is unfolded, it extends with its longitudinal axis substantially perpendicular to the surface of the shell 11.
- a net 16 is provided in the region of the opening 12 ,
- the closure element 13 On the right side of Fig. 3, the closure element 13 is shown for the case that the air flow according to arrow 15 would be done from the inside outwards (corresponding to the right side of Fig. 2).
- the network 16 now prevents the flexible closure element 13 is pushed through the opening 12 to the outside and then release a flow opening.
- the function of the network can also fulfill a holey airbag area or shell area.
- the tubular closure element 13 is made for example of a plastic film or a silicone skin.
- the channel-shaped, flexible flow-through region of a closure element is preferably realized by boundary walls running essentially parallel to one another.
- the closure element 13 can also, as shown in Fig. 4, have different orientations and designs of the boundary walls.
- the channel can have a conical, tapering cross-section towards its free end.
- the cross section may also widen towards its free end, as shown in the sketch below.
- the closure element but also, for example, barrel-shaped shape but also have prismatic shape, hyperboloidal shape and the like.
- FIG. 4 In the middle and on the right side of FIG. 4, different embodiments of closure elements are shown, which have different recesses.
- the example has in the middle above several small circular recesses 17.
- the recesses 17 may also ensure that the openings 12 is not completely closed in the counterflow.
- the elongate recesses 18 according to the diagram of Fig. 4 bottom right.
- the flow resistance is further reduced.
- the example at the bottom center in the upper part of the closure element 13, the one tube half or a tube wall is completely missing. This results in a relatively large recess 19.
- Another example of a closure element is shown in Fig. 4 top right, in which the upper free edge of the channel is corrugated or jagged. Again, this is achieved by recesses 20 in the broadest sense.
- Such recesses basically have the purpose of having less material that proves to be troublesome when the channel is folded.
- the channel-shaped region of the closure element 13 is connected at one end to the shell 11 or the airbag surface and at the other end substantially free.
- a force or a limiting element By a force or a limiting element, a movement of the flow area can be influenced. This can, for example, for targeted creation / sealing or to reduce unwanted movements such. Flapping may be useful.
- the sealing can also be promoted by certain shapes or geometric orientations.
- the closure element according to FIG. 5 may consist of a flattened tube towards one end, which may additionally also be oriented obliquely. On the left side of Fig. 5, the channel-shaped closure element is shown in perspective with flattened ends. In the illustrated case, the closure element 13 is not flowed through. In the cross section on the right side of FIG.
- the closure elements may also have further expedient embodiments.
- the channel formed by the closure element does not necessarily have to have a round or square dimension. Rather, it can also be triangular, polygonal, rectangular, etc.
- the closure elements can also be realized by combining several hoses (eg hose in hose, different lengths, diameters, openings, etc.). Analogous to the closure element according to FIG. 4, middle bottom, a square channel can be realized with only one, two or three of the four walls, which can also be of different lengths.
- FIG. 1 A further embodiment of a closure element according to the invention is shown in FIG.
- FIG. 6 reproduced. It is a biased hose with respect to a longitudinal axis (main flow direction) rotatable. It is shown in Fig. 6 on the left side in its flow-through state, ie in its unfolded or untwisted state. To better illustrate its effect principle, it is chosen here with a square plan. In the flow-through state, it has a large opening 21. If the hose no longer flows through, it rotates according to the picture of Fig. 6, center one. In this case, both its height and its flow-through opening 21 are reduced. In the right-hand image of FIG. 6, the hose, ie the closure element 13, is shown in its completely screwed-in state. The opening 21 is possibly reduced until complete closure and the "tube" now assumes disc shape.
- FIG. 7 Another example of a closure element 13 is shown in Fig. 7 left in the plan view and right in cross section. It represents in the relaxed, non-flow-through state, a stretchable disc with a suitably small hole 22.
- the disc is annularly secured to the shell 11 at its outer periphery. Now, if the closure element is acted upon from below or from the outside with a gas pressure, so the disc bulges in the middle upwards and the hole 22 widens (see Fig. 7, right side). The gas flows according to the arrows 14 from outside to inside. In the relaxed state, d. H. in the flow-free state, the curvature of the disc sets again and the disc is flat again according to the dashed lines 13.
- FIG. 8 shows a variant of the example of FIG. 7.
- the disc-shaped closure element 13 has here in the relaxed state only a very small hole 24 through which virtually no exchange of air is possible (see Fig. 8, left side).
- the closure element 13 In the middle of Fig. 8, the closure element 13 is shown at low air flow. It has already bulged in the middle and the opening 24 is expanded accordingly. With even greater air flow from below or from the outside, the closure element 13 according to the right side of Fig. 8 expands even further and the opening 24 is even larger. Here again a unique channel shape can be seen. At an air pressure in the opposite direction, the closure element 13 would expand accordingly downward, if this is not prevented by an underlying net or a corresponding perforated shell. In this example, because of the small Hole 24 in the relaxed state no additional seal 23 as in the example of Fig. 7 necessary.
- the flow direction-dependent characteristic On the one hand, one uses a flow direction-dependent characteristic, according to which the flow resistance depends on the flow direction. On the other hand, there is an inflow with no or little deflection of the gas flow. Furthermore, the fact is used that the flow channel in the flow direction is substantially stable (oriented), while it is labile or partially or completely closed when reversing the direction. In addition, for example, the dynamic pressure and / or the Bernoulli effect can be used. This allows shutter forces to be generated in different directions (parallel to or in the direction of flow and transversely thereto). This makes it possible to achieve a better and safer, automatic seal.
- the unstable state can optionally be directed by initial force (eg by spring tension or gas inflow) in a desired direction (eg for more targeted application / sealing).
- a stable state for example by geometric limitation (such as straps or bars) can be further stabilized, for example, to avoid flutter.
- sealing eg by silicone skin
- supporting / strength eg by air-permeable mesh
- the responsible areas that abut each other for collapsing the flexible channel-shaped flow area can be designed and matched accordingly.
- This may also relate to the material of the airbag surface or the supporting, air-permeable material in the flow-through region.
- this can be done by a suitable positive fit, which can be achieved by hooking, velcro-like design, increasing the friction, etc.
- the gas seal can also be carried out additionally or alternatively by appropriate frictional connection (eg compression of the area by the gas pressure).
- a local coating eg of silicone
- a release agent eg talcum
- the area of the boundary walls of the flow-through area (for example of the tubular channel) must be at least equal to the area of the flow-through opening.
- the length of the tube must be at least equal to the radius of the round flow opening.
- the collapse of the channel may be chaotic or ordered, or a combination of both.
- closure elements d. H. the movable, flexible flow areas have the lowest possible mass. They should also be as flexible as possible. This can be influenced for example by the thickness and the material properties of the boundary walls.
- the solution principle according to the invention can also be implemented directly in a flexible fabric (for example in an airbag fabric).
- a flexible fabric for example in an airbag fabric.
- a one-piece woven material or a foil, in which corresponding closure elements are integrated can be used.
- the openings and closure elements preferably have macroscopic or microscopic dimensions.
- a combination of different types of production (eg weaving and coating) or materials (eg one-piece woven fabric and film) is also possible.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009002669.9T DE112009002669B4 (de) | 2008-11-14 | 2009-10-30 | Luftsack mit kanalförmigen Verschlusselement |
US13/129,141 US8979117B2 (en) | 2008-11-14 | 2009-10-30 | Air cushion with a channel-shaped closure element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008057376.0 | 2008-11-14 | ||
DE200810057376 DE102008057376A1 (de) | 2008-11-14 | 2008-11-14 | Luftsack mit kanalförmigem Verschlusselement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010054754A1 true WO2010054754A1 (de) | 2010-05-20 |
Family
ID=41360103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/007792 WO2010054754A1 (de) | 2008-11-14 | 2009-10-30 | Luftsack mit kanalförmigem verschlusselement |
Country Status (3)
Country | Link |
---|---|
US (1) | US8979117B2 (de) |
DE (2) | DE102008057376A1 (de) |
WO (1) | WO2010054754A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103097202A (zh) * | 2010-09-07 | 2013-05-08 | 戴姆勒股份公司 | 尤其用于汽车的安全气囊 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008037810B4 (de) * | 2007-11-02 | 2020-03-26 | Daimler Ag | Fahrzeuginsassensicherheitssystem mit energieabsorbierenden Elementen und Verfahren zum Abstützen eines Insassen |
DE102010023370A1 (de) | 2010-06-10 | 2011-12-15 | Daimler Ag | Rückhaltesystem insbesondere für einen Kraftwagen |
DE102010045903A1 (de) | 2010-09-17 | 2011-06-16 | Daimler Ag | Luftsack, insbesondere für einen Airbag eines Kraftwagens |
DE102012016996A1 (de) * | 2012-08-28 | 2013-03-28 | Daimler Ag | Airbag für einen Kraftwagen |
US9862350B2 (en) * | 2013-08-12 | 2018-01-09 | Tk Holdings Inc. | Dual chambered passenger airbag |
JP2015051744A (ja) * | 2013-09-09 | 2015-03-19 | トヨタ自動車株式会社 | 車両用乗員保護装置 |
WO2015112644A1 (en) | 2014-01-21 | 2015-07-30 | Tk Holdings Inc. | Passenger side airbag |
WO2015113739A1 (de) | 2014-01-30 | 2015-08-06 | Trw Automotive Gmbh | Gassack und verfahren zum betrieb eines fahrzeuginsassenschutzsystems |
US9580039B2 (en) * | 2014-04-22 | 2017-02-28 | Autoliv Asp, Inc. | Multi-chamber airbag with unidirectional vent |
DE102016009590A1 (de) | 2016-08-06 | 2018-02-08 | Daimler Ag | Folie für einen Airbag |
Citations (8)
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DE7048410U (de) * | 1971-04-08 | Hoch M | Insassenschutzvornchtung bei Fahr zeugen | |
JPS4880229U (de) * | 1971-12-29 | 1973-10-02 | ||
JPS48113024U (de) * | 1972-03-28 | 1973-12-25 | ||
DE2409409A1 (de) * | 1973-02-28 | 1974-08-29 | Eaton Corp | Insassensicherheitseinrichtung fuer fahrzeuge |
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WO2007110167A1 (de) * | 2006-03-23 | 2007-10-04 | Daimler Ag | Gassack für ein kraftfahrzeug |
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DE102008037810B4 (de) * | 2007-11-02 | 2020-03-26 | Daimler Ag | Fahrzeuginsassensicherheitssystem mit energieabsorbierenden Elementen und Verfahren zum Abstützen eines Insassen |
US8616944B2 (en) * | 2009-09-04 | 2013-12-31 | GM Global Technology Operations LLC | Pressure relief valve for a vehicle body |
-
2008
- 2008-11-14 DE DE200810057376 patent/DE102008057376A1/de not_active Withdrawn
-
2009
- 2009-10-30 US US13/129,141 patent/US8979117B2/en active Active
- 2009-10-30 WO PCT/EP2009/007792 patent/WO2010054754A1/de active Application Filing
- 2009-10-30 DE DE112009002669.9T patent/DE112009002669B4/de active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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DE7048410U (de) * | 1971-04-08 | Hoch M | Insassenschutzvornchtung bei Fahr zeugen | |
JPS4880229U (de) * | 1971-12-29 | 1973-10-02 | ||
JPS48113024U (de) * | 1972-03-28 | 1973-12-25 | ||
DE2409409A1 (de) * | 1973-02-28 | 1974-08-29 | Eaton Corp | Insassensicherheitseinrichtung fuer fahrzeuge |
DE19930155A1 (de) * | 1999-06-30 | 2001-01-04 | Takata Europ Gmbh | Rückschlagventil für eine Luftsack |
EP1595751A1 (de) * | 2003-01-31 | 2005-11-16 | Ashimori Industry Co., Ltd. | Airbagvorrichtung |
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WO2007110167A1 (de) * | 2006-03-23 | 2007-10-04 | Daimler Ag | Gassack für ein kraftfahrzeug |
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CN103097202A (zh) * | 2010-09-07 | 2013-05-08 | 戴姆勒股份公司 | 尤其用于汽车的安全气囊 |
Also Published As
Publication number | Publication date |
---|---|
DE102008057376A1 (de) | 2010-05-20 |
DE112009002669B4 (de) | 2024-07-04 |
DE112009002669A5 (de) | 2012-10-11 |
US20110248487A1 (en) | 2011-10-13 |
US8979117B2 (en) | 2015-03-17 |
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