WO2008019726A1 - Rückhaltesystem - Google Patents
Rückhaltesystem Download PDFInfo
- Publication number
- WO2008019726A1 WO2008019726A1 PCT/EP2007/005558 EP2007005558W WO2008019726A1 WO 2008019726 A1 WO2008019726 A1 WO 2008019726A1 EP 2007005558 W EP2007005558 W EP 2007005558W WO 2008019726 A1 WO2008019726 A1 WO 2008019726A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- restraint system
- support structure
- gas
- support structures
- restraint
- 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
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
-
- 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
Definitions
- the invention relates to a restraint system for a motor vehicle according to the features of the preamble of claim 1.
- inflatable restraint systems such as driver or passenger airbags are well known.
- the airbag is folded up in a storage position. If an accident is detected, the airbag is pyrotechnically filled with gas, so that it unfolds abruptly on the vorverlagernden occupant.
- the gas cushion quickly reaches its effective volume.
- gas for example pyrotechnic
- occupant and / or vehicle parameters have recently been evaluated in order, for example, to prevent the gas bag from developing to full size by gas volume reduction in the case of so-called "out-of-position" of the occupant conceivable load cases and the relatively costly control technology. Therefore, efforts are increasingly being made to develop so-called self-regulating systems that can adjust themselves to the corresponding load cases.
- German Offenlegungsschrift 2 302 737 has disclosed a restraint system comprising a two-layered gas bag, in which the gas is conducted only between the two layers, so that there is no complete gas cushion, but rather a spherical ring-shaped supporting structure. The unfolding of the support structure takes place in the transverse direction of the adjoining gas cushion.
- EP 0589 059 B1 shows that, when unfolding the two-layer gas bag, it is necessary to suck ambient air into the interior in order to overcome the negative pressure.
- GB 1 420 226 A shows a restraint system for a motor vehicle in that a tubular support structure is provided in the interior of the two-layered gas cushion, whose longitudinal extent in the inflated, ie active, state exceeds the dimensions of the transverse extent.
- the support structure unfolds due to their special geometry mainly in the direction of their longitudinal extent.
- the principle of the restraint system according to the invention is based on the fact that the unfolding is effected by one or more support structures which can be filled with gas from a gas pressure source, while the retention is ensured by the carrying volume enveloped by flexible support structures. If the restraint system is activated, only the support structures, for example pyrotechnic, are filled with gas. When deploying or erecting the support structures flexible support structures are clamped, which envelop a carrying volume. The carrying capacity is formed due to the rapid deployment of the system by sucking in ambient air and is sufficient to withhold the occupants.
- the support structure may be an airbag fabric, a net or similar flexible fabric.
- An advantage of the invention is that only a gas pressure source must be provided for filling the support structures gas.
- the support structures can be stopped with only small forces due to the small volume of gas during deployment. This means that in "out of position" of the occupant, the deployment of the affected support structure is easier stopped or obstructed or deflected without undue stress on the occupant, while other support structures can continue to unfold, so that the flexible support structures spanned and thus Nevertheless, the carrying capacity can be formed so far that a retention effect occurs.
- a support structure is provided according to claim 2, which is designed substantially tubular.
- the support structure can be stopped by low forces during deployment, which can be done for example by kinking. Due to the special geometric shape of the support structure, namely by a longitudinal extent exceeding the cross-section, the stability that it would have at full deployment, and / or the final volume or the final extent is not reached when hitting an obstacle during deployment. Due to their elongated design, the support structure behaves differently stable during deployment.
- a support structure may be formed as a pilot tube, which is first filled after activation with the gas of the gas pressure source.
- the pilot hose does not necessarily have to be tubular. It can also be e.g. assume the shape of a tetrahedron.
- the pilot tube is in registration with a predetermined breaking line / point below the airbag cover.
- the pilot tube takes its cross-section abruptly in a limited but very effective to the opening area, so that the airbag flap can be pressed with less gas and escape the restraint system. This requires less energy to open the flap. The load can be lowered.
- outflow and / or inflow openings can be provided in the restraint system, which allow, depending on the load case, the inflow of ambient air or the discharge.
- the restraint system can be designed to be self-regulating. That is, depending on the particular load case, the cross section of the outflow and / or the inflow openings adapts via the extent of the restraint system.
- the opening cross section can be opened or closed, for example by means of a slider.
- the connection between slide and support structures can be done for example via cables or tethers.
- this contact surface and thus the seal in persons with a larger volume (and thus usually larger weight) larger, so that in this way a stronger retention effect is achieved.
- the contact surface and thus the retention effect is also increased by a greater immersion of the occupant in the airbag.
- This principle also allows a different air bag damping for strapped and unguarded passengers, since in unguarded case, the occupant will dive less strongly in the airbag.
- outflow openings are formed as perforations, that is to say as many small openings, as for example in the case of a fabric net, a projection surface corresponding to the dimensions of the occupant can be closed. With many small outflow openings, the reproducibility of the results increases on average.
- a gas pressure source in particular a gas generator, with only small dimensions is necessary, so that the restraint system can be in its storage position in the roof area.
- the usually housed in the steering wheel or in the cockpit area airbags could then be eliminated in favor of restraint systems that can be accommodated in the roof frame area to save space and unfold diagonally from above towards the occupant.
- the advantage would be that no distinction between driver and passenger airbag must be made.
- Equivalent restraint systems can be provided for the driver as well as for the front passenger or even rear passengers.
- At least one of the support structures extends at least partially into coverage of a hard structure, such as a support column. It is also possible to provide a support structure that unfolds between the occupants as an interaction bag.
- the one-piece-woven technique is recommended. This technique is characterized by the fact that on one and the same device, if necessary, double-layered for the inflatable support structures and single-layered for the flexible fabrics or a three-dimensional structure can be woven.
- the gas flowing into the support structure can be redistributed to other adjacent support structures or into the environment with the aid of redistribution means. It is also conceivable that the internal pressure generated by the afterflow is reduced in the support structure by a cross-sectional increase of the support structure. This can be done so that tear seams fail at a certain pressure, so that the support structure in its transverse direction can enlarge. It is also conceivable a pressure relief valve that opens when an excessive internal pressure is reached.
- the gas can be utilized in the support volume enveloped thereby for the retention effect.
- the gas in the carrying volume that serves to restrain occupants may be heated by means of a heating device (e.g., a squib or a small gas generator stage that generates heat and possibly a small volume of gas).
- a heating device e.g., a squib or a small gas generator stage that generates heat and possibly a small volume of gas.
- Fig. 1 shows a support structure shortly after activation of a
- FIG. 3 shows the support structure according to FIG. 1 in the completely unfolded state
- FIG. 4 shows a restraint system with a complex one
- FIG. 6 shows a restraint system in a further embodiment with a complex support structure
- FIG. 7 shows a restraint system according to FIG. 5 when hitting an obstacle.
- Fig. 5 two interconnected by a flexible sheet supporting structures.
- Figures 1 to 3 show a schematic side view of a support structure 1, which is rolled up in the deactivated state. Alternatively, a zigzag folding or other folds is possible.
- the length L of the support structure in the active state substantially exceeds the dimensions of the cross section Q. It is irrelevant which cross-sectional shape has the support structure 1.
- the support structure 1 is extremely unstable with respect to acting transverse forces, so that when hitting the obstacle of the not yet unfolded portion is simply clamped at the designated 6 position.
- the support structure does not achieve the stability it would have at full deployment and / or the final volume or extent so that the load values on the occupant are substantially reduced.
- the support structure 1 can be deflected (compare FIG. 2b). Again, during deployment, the support structure does not achieve the stability it would have upon complete deployment.
- Figures 1 to 3 show the basic operation of a single support structure. Only in conjunction with flexible support structures, the restraint system unfolds its full retention effect. This will be explained in more detail below with reference to Figures 4 to 7.
- FIG. 4 shows a restraint system 8 in its retaining position, which comprises a plurality of support structures 1 and flexible support structures 7 connecting them to one another.
- the restraint system 8 has its own
- support structures 11 are provided, which are fluidly connected to each other via a transverse support structure 12. Between the support structures 11 and 12 are flexible support structures 7, in particular flexible sheets, clamped. As a result, the flexible supporting structures 7 envelop a cuboid carrying volume 13 -in this case. It goes without saying that the external shape of the carrying volume 13 is dependent on the spatial profile of the supporting structures and the supporting structures.
- the support structures 11 When unfolding the restraint system 8, first the support structures 11 are filled with gas, so that they straighten up and the gas in the direction of arrow G in the transverse support structures 12 can flow. As a result, the flexible support structures 7 are clamped between the support structures 11, 12 and the carrying volume 13 is enveloped. The ambient air necessary for the retention effect is sucked into the interior of the restraint system 8 via corresponding inflow openings. The resulting negative pressure inside the restraint system 8 causes a rapid intake of ambient air, so that no additional pressure source is necessary.
- the gas can be heated or supplemented by means of a heating device (eg a squib or a small gas generator stage which generates heat and possibly a small gas volume), so that the gas expands abruptly and thus the internal pressure increases.
- a heating device eg a squib or a small gas generator stage which generates heat and possibly a small gas volume
- FIG. 6 A second embodiment is shown in FIG. 6. Like reference numbers indicate like components. Different versions are marked with apostrophe.
- the support structures 11 ' are filled according to arrow G with gas from a gas pressure source. Of the support structures 11 ', the gas flows into the transverse support structures 12'. By erecting the support structures 11 ', 12', the flexible support structures 7 'are stretched again, so that the carrying volume 13' is formed. Of particular importance are the support structures 11 'extending beyond the transverse support structures 12'. By these projecting sections IIa lateral supports can be formed, which can absorb lateral forces, for example, in a staggered frontal impact.
- Figure 7 shows the behavior of the restraint system 8 'when hitting an obstacle.
- the left support structure 11 ' is clamped so that this portion can not further upright.
- the clamping is carried out as described in Figure 2b.
- the carrying volume can be increased by means of a heating element, that is to say the internal pressure can be increasingly designed.
- the arrangement of the support structures in cooperation with the flexible support structures, in particular fabrics, is largely determined by the position of the restraint system within the vehicle and the expected load cases.
- the support-like arrangement for a side impact protection will be designed differently for reasons of space, as support structures for the frontal impact.
- the fact is that with the elongated support structures, a large number of positions in the vehicle can be achieved. can not reach the conventional gas bags due to the necessary gas volume.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009524086A JP4891403B2 (ja) | 2006-08-14 | 2007-06-23 | 車両用拘束システム |
CN200780030396.2A CN101506005B (zh) | 2006-08-14 | 2007-06-23 | 约束系统 |
US12/377,573 US8998252B2 (en) | 2006-08-14 | 2007-06-23 | Restraint system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006038125.4A DE102006038125B4 (de) | 2006-08-14 | 2006-08-14 | Rückhaltesystem |
DE102006038125.4 | 2006-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008019726A1 true WO2008019726A1 (de) | 2008-02-21 |
Family
ID=38458219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/005558 WO2008019726A1 (de) | 2006-08-14 | 2007-06-23 | Rückhaltesystem |
Country Status (5)
Country | Link |
---|---|
US (1) | US8998252B2 (de) |
JP (1) | JP4891403B2 (de) |
CN (1) | CN101506005B (de) |
DE (1) | DE102006038125B4 (de) |
WO (1) | WO2008019726A1 (de) |
Cited By (1)
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---|---|---|---|---|
WO2021185752A1 (de) * | 2020-03-16 | 2021-09-23 | Dalphi Metal Espana, S.A. | Gassackmodul und fahrzeuginsassen-rückhaltesystem |
Families Citing this family (11)
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DE102007052246B4 (de) | 2007-11-02 | 2020-06-04 | Daimler Ag | Airbag, insbesondere für einen Kraftwagen |
DE102008012137B4 (de) * | 2008-03-01 | 2018-10-25 | Daimler Ag | Airbag |
DE102008014442A1 (de) | 2008-03-14 | 2009-09-17 | Daimler Ag | Airbagsystem mit wiederholt einsetzbarer oder regenerierbarer/austauschbarer Gasquelle |
DE102008057376A1 (de) | 2008-11-14 | 2010-05-20 | Daimler Ag | Luftsack mit kanalförmigem Verschlusselement |
DE102009021854A1 (de) | 2009-05-19 | 2010-11-25 | Daimler Ag | Airbag mit eingewebten Funktionselementen |
EP2905185B1 (de) * | 2014-02-06 | 2018-03-14 | Autoliv Development AB | Kraftfahrzeug mit einem Airbag zwischen einem Rad und der Fahrzeugkarosserie und Airbageinheit |
DE102014001952B4 (de) | 2014-02-12 | 2019-01-24 | Daimler Ag | Insassenschutzvorrichtung für ein Fahrzeug und Fahrzeug |
DE102014017841B4 (de) | 2014-12-03 | 2022-08-11 | Mercedes-Benz Group AG | Insassenschutzvorrichtung für ein Fahrzeug und Fahrzeug |
DE102017011884A1 (de) | 2017-12-21 | 2018-07-19 | Daimler Ag | Rückhaltesystem |
DE102019203048B4 (de) | 2019-03-06 | 2025-02-20 | Ford Global Technologies, Llc | Airbagmodul und Kraftfahrzeug |
DE102023120543A1 (de) * | 2023-08-02 | 2025-02-06 | Zf Automotive Germany Gmbh | Fahrzeuginsassen-Rückhaltesystem |
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WO2021185752A1 (de) * | 2020-03-16 | 2021-09-23 | Dalphi Metal Espana, S.A. | Gassackmodul und fahrzeuginsassen-rückhaltesystem |
Also Published As
Publication number | Publication date |
---|---|
US20120068445A1 (en) | 2012-03-22 |
CN101506005B (zh) | 2012-10-31 |
JP4891403B2 (ja) | 2012-03-07 |
CN101506005A (zh) | 2009-08-12 |
US8998252B2 (en) | 2015-04-07 |
DE102006038125A1 (de) | 2008-02-21 |
DE102006038125B4 (de) | 2022-08-18 |
JP2010500223A (ja) | 2010-01-07 |
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