WO2008110448A1 - Dispositif de protection d'un passager d'un véhicule automobile - Google Patents

Dispositif de protection d'un passager d'un véhicule automobile Download PDF

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Publication number
WO2008110448A1
WO2008110448A1 PCT/EP2008/052257 EP2008052257W WO2008110448A1 WO 2008110448 A1 WO2008110448 A1 WO 2008110448A1 EP 2008052257 W EP2008052257 W EP 2008052257W WO 2008110448 A1 WO2008110448 A1 WO 2008110448A1
Authority
WO
WIPO (PCT)
Prior art keywords
inflatable element
gas
occupant
protection device
inflator
Prior art date
Application number
PCT/EP2008/052257
Other languages
German (de)
English (en)
Inventor
Hans-Peter Sendelbach
Original Assignee
Takata-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 Takata-Petri Ag filed Critical Takata-Petri Ag
Publication of WO2008110448A1 publication Critical patent/WO2008110448A1/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
    • B60R21/18—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags the inflatable member formed as a belt or harness or combined with a belt or harness arrangement
    • 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
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
    • 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
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
    • 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
    • B60R2021/0002—Type of accident
    • B60R2021/0006—Lateral collision
    • 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
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
    • B60R2021/0055—Pelvis
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26094—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by fluid flow controlling valves

Definitions

  • Occupant protection device for an occupant of a motor vehicle
  • the invention relates to an occupant protection device for an occupant of a motor vehicle according to the preamble of claim 1.
  • Such an occupant protection device comprises a safety belt, which may also be a multi-part belt system and is intended to be arranged in such a way in a motor vehicle or on a motor vehicle seat, that hereby a seated in normal position on the vehicle seat occupant in the event of collision-related external forces the motor vehicle seat is restrained, and an inflatable element connected to the seat belt, which is filled with gas to protect the vehicle occupant sitting on the vehicle seat and forms a gas cushion in the filled state, which acts on the basin of the vehicle occupant, and further an inflator for providing a Gas with which the gas bag can be filled.
  • a safety belt which may also be a multi-part belt system and is intended to be arranged in such a way in a motor vehicle or on a motor vehicle seat, that hereby a seated in normal position on the vehicle seat occupant in the event of collision-related external forces the motor vehicle seat is restrained
  • an inflatable element connected to the seat belt, which is filled with gas to protect the vehicle occupant sitting on the vehicle seat and forms a
  • Such an occupant protection device is known, for example, from DE 10 2004 005 412 A1.
  • the inflatable element which is to serve in a crash case to protect the pelvic area of a motor vehicle occupant, is integrated, for example, in a lap belt portion of a seat belt and thereby arranged on the lap belt, that the inflatable element forms a gas cushion in the gas-filled state, the between a lateral vehicle structure and the vehicle occupant to be protected lies.
  • the inmate in particular Impact protected in the vehicle interior penetrating body parts of the lateral vehicle structure.
  • the invention is based on the problem to further improve an occupant protection device of the type mentioned.
  • the inflator associated with the inflatable element is coupled to a pre-crash sensor which activates the inflator to inflate the airbag when an imminent (but not yet done) by means of the pre-crash sensor (and associated evaluation unit / electronics) ) Collision of the motor vehicle with a third object or an unusual or dangerous driving situation is detected.
  • the inflatable element serving as a pelvic protection By filling the inflatable element serving as a pelvic protection already before the occurrence of a collision, the inflatable element typically deploying between the lateral vehicle structure and the vehicle occupant to be protected has sufficient space for the formation of the gas cushion provided for protecting the pelvic region of the vehicle occupant available.
  • the pelvic protection serving inflatable element is triggered only when a collision occurs, for. B. by serving as a crash sensor acceleration sensor activates the inflatable element associated inflator, so at this time by the - especially in a side impact - already penetrating into the vehicle interior areas of the lateral vehicle structure is no longer sufficient space for proper deployment of the inflatable element between the lateral vehicle structure and the vehicle occupant to be protected are available.
  • the inflatable element which unfolds before the occurrence of a collision can be used to move the vehicle occupant to be protected away from the lateral vehicle structure in the direction of the center of the vehicle under the action of the deploying inflatable element To minimize the risk of a collision in the vehicle interior in deformed areas of the lateral body structure with the vehicle occupant to be protected.
  • an inflatable element integrated into the safety belt can also be used to tighten the seat belt even before a collision occurs, by using a material for the inflatable element that causes a substantial shortening of the inflatable element along a longitudinal direction when the inflatable element inflatable element is filled with gas and thereby transversely to the
  • Section of the seat belt this can lead to the desired tightening of the seat belt, the shortening of the inflatable element.
  • vehicle environment sensing sensors such as an image acquisition system (camera), a radar or the like, and / or an on-vehicle systems monitoring detection device can be used.
  • an image acquisition system camera
  • radar radar
  • on-vehicle systems monitoring detection device can be used.
  • the tightening of the associated seat belt caused by the inflatable element is helpful not only in the case of an impact of a third object on the lateral vehicle structure in the area of the vehicle occupant to be protected, but also in other collision cases, such.
  • the inflatable element is reversible, so that after filling by the associated inflator
  • Such a reversible embodiment of the inflatable element has the advantage that the triggering threshold of the occupant protection device can be made comparatively low, so that an activation of the inflator for filling the inflatable element can already take place if the associated pre-crash Sensor determines a sufficient probability of an imminent collision without the collision is already considered safe.
  • the reversible occupant protection device is returned to the state in which the inflatable element is available for re-inflation.
  • EP 1 559 622 A2 For details with regard to the reversible embodiment of an occupant protection system, reference is made to EP 1 559 622 A2.
  • a compressed gas reservoir from which by means of a valve (switching valve) each gas for filling the inflatable element can be removed when the associated pre-crash sensor detects a imminent with a certain probability collision.
  • a pressure control can be provided, for. B. using a suitable control valve, pressure sensor and pressure regulator.
  • the inflatable element may be made of a fabric that causes the inflatable element to shorten along a first direction (longitudinal direction of the inflatable element) when the expansion of the inflatable element when filling along at least one other direction (width direction) increases.
  • the inflatable element may be an elongated tube whose two ends (end faces) are each connected to a portion of the safety belt. When filling this inflatable element with gas, its expansion in the radial direction, ie its diameter or width, increases at the same time as the length of the tubular element decreases, which leads to a tightening of the safety belt connected thereto.
  • a hose-like, inflatable element and materials suitable therefor are described for example in US-A 5,322,322 and US-A 5,839,753.
  • the above-described tissue itself gas-tight (or substantially gas-tight) designed so that that tissue can form a shell of the inflatable element directly through which the interior is substantially gas-tightly separated from the environment.
  • a one- or two-sided coating of the fabric with an (elastic) sealing layer can be provided, wherein the coating can furthermore be designed so that it facilitates or promotes a return of the inflatable element to its original state after inflation.
  • the coating may contain a rubbery silicone compound.
  • a separate inflatable body containing a shell which receives the admitted when filling the inflatable element gas and which may consist for example of classic gas bag fabric or a rubber bubble the tendency has, after releasing a previously filled gas, revert back to its original form that it had before filling with gas.
  • the inner inflatable body formed by the separate shell can be suitably, z. B. by gluing or sewing, be connected to the shortening tissue and / or the seat belt.
  • z. B. depending on whether a side impact is present in which to protect a vehicle occupant required gas cushion must be present only for a relatively short time in the filled state, or a vehicle rollover is present, may be required in the pressure hold times of up to 7 seconds, the Controlling the discharge of gas from the inflatable element filled with the inflator in particular, using a controllable / switchable valve for venting gas from the inflatable element.
  • return means may be provided for exerting and counteracting the inflatable element with a force towards a given geometric configuration the effect of which inflates the inflatable element upon activation of the inflator.
  • return means may be associated with different components of the inflatable element, ie z. It is crucial that the restoring means act on those components of the inflatable element, which are returned to a specific geometric configuration after filling and subsequent emptying of the inflatable element should. It may be sufficient to return a portion of the components of the inflatable element under the action of the return means in their original configuration, if more components are automatically taken in this case.
  • the inflatable element can furthermore be surrounded by a protective cover, which can serve in particular for the protection of a tissue shortening during inflation and for this purpose can be made elastic, for example.
  • the protective cover can also be made resealable, z. B. by means of a hook and loop fastener. In this case, the protective cover is at least partially opened during filling of the inflatable element and later closed again (after emptying of the inflatable element).
  • the inflatable element is filled with gas not only in an impending collision, but also in critical Driving conditions, such. B. in response to an ESP system of the motor vehicle, at high bends or strong braking. In this way, for example, an improved safety of the vehicle occupant to be protected by tightening the seat belt can be achieved in such situations.
  • the inflatable element is filled in such cases with a lower pressure than when detecting an imminent collision with a third object.
  • the occupant protection device can also be operated in combination with other (reversible) protection systems, such.
  • Fig. 1 a an occupant protection device for one in addition to a side
  • FIG. 1 b shows the occupant protection device from FIG. 1 a after filling an inflatable element integrated in a seat cushion
  • FIG 2b shows an arrangement according to Figure 2a, but without filling the inflatable elements.
  • FIG. 3 shows a modification of the embodiment of Figures 1 a to
  • FIG. 4a shows a first embodiment of an integrable in a safety belt inflatable element, which for the Occupant protection device of Figures 1 a to 2b can be used;
  • FIG. 4b shows the inflatable element of FIG. 4a in the inflated state
  • Fig. 4c shows a detail of the inflatable element of Figures 4a and
  • FIGS. 1a to 2b shows a second embodiment of an inflatable element which can be used in an occupant protection device according to FIGS. 1a to 2b;
  • FIGS. 1a to 2b shows a third exemplary embodiment of an inflatable element that can be used in an occupant protection device according to FIGS. 1a to 2b;
  • Fig. 6b shows a fourth embodiment of an inflatable element, the inflatable element, the at a
  • Occupant protection device according to Figures 1 a to 2b can be used;
  • Fig. 7a an example of the integration of an inflatable element in one
  • Seat belt, with additional return means are provided to return the inflatable element after filling with gas and subsequent emptying back to its original geometry can;
  • FIG. 7b shows a cross section through the arrangement of FIG. 7a
  • FIG. 7c shows a cross section through a modification of the arrangement from FIG. 7a;
  • Fig. 8 shows a modification of the embodiment of Figures 7a to
  • FIG. 7c. 1 a shows a motor vehicle seat 1 fixed to the body floor in addition to a lateral body structure S of a motor vehicle, on the seat cushion 10 of which a vehicle occupant I has taken a seat.
  • the pelvic area B, the upper body O and the head K can be seen in the illustration according to FIG.
  • an inflatable element 12 is arranged, which can be filled by means of an associated compressed gas storage 15 as an inflator via a gas line 16 with gas.
  • an outlet valve 19 connected to the inflatable element 12 via a gas line 18 serves.
  • the vehicle seat 1 is assigned a safety belt 2 (with at least one elastic webbing), which is a so-called three-point belt system which is connected at three points to the vehicle body and / or the vehicle seat, namely in the present case on the one hand in the region of a buckle 21 and on the other hand on the belt buckle 21 along the vehicle transverse axis opposite side of the vehicle seat at a point 25 in the lateral vehicle structure S and also via a provided on the lateral vehicle structure S belt retractor 29th
  • the seat belt 2 has a belt section 20 (shoulder belt section) assigned to the upper body O of the vehicle occupant I, and a belt section 22 (lap belt section) assigned to the pelvic area and the thighs of the vehicle occupant.
  • a tubular inflatable element 3 inflatable tube is integrated in the initial state, which extends in an elongate shape between two end faces, which are each connected to the lap belt 22.
  • the inflatable element 3 integrated in the lap belt section 22 of the safety belt 2 is associated with an inflator 45, which communicates with the inflator 3 via a gas line 46 so that it can be filled with gas by means of the inflator 45 comprising a compressed gas reservoir.
  • an outlet valve 39 may be provided, see Fig. 2a.
  • the inflator 45 in the form of a compressed gas reservoir is coupled to a so-called pre-crash sensor 48 which continuously monitors the vehicle environment and in the event of an imminent collision or other critical driving situation, the inflator 45 for filling the inflatable element 3 integrated into the seat belt 2 activated.
  • the pre-crash sensor may also monitor certain vehicle systems to detect critical driving situations, such as: B. by monitoring an ESP system or the steering movement.
  • the inflator 15 is first activated in the form of a compressed gas storage by the pre-crash sensor by means of the seat-integrated inflatable element 12 can be filled with gas.
  • the vehicle occupant I is raised slightly, as the transition from FIG. 1 a to FIG. 1 b shows, so that the seat connection of the vehicle occupant I is somewhat reduced and it is made easier for the occupant to move away from the lateral vehicle structure S in order to prevent the vehicle occupant 1 from being seated to protect in a side impact possibly penetrating into the vehicle interior body areas.
  • the belt-integrated inflatable element 3 is filled with gas by activating the associated inflator 45 and unfolds between the side body structure S and the pelvic area B of sitting on the vehicle seat 1, to be protected vehicle occupant I.
  • This is the vehicle occupant I in his Pelvic area B of the lateral vehicle structure S away toward the center of the vehicle interior moves (pressed) to him before in the motor vehicle to protect invading body areas.
  • the belt-integrated inflatable element 3 acts almost exclusively on the pelvic area B of the vehicle occupant I to be protected.
  • the two inflatable elements 3, 12 may also be arranged in a different order, e.g. essentially simultaneously, be filled with gas
  • the force that tends to move the vehicle occupant I in his pelvic region B away from the lateral body structure S does not have to be applied alone (or predominantly) by the inflatable element 3 deploying the seat belt-integrated inflatable element 3 itself. Rather, after the occurrence of the expected collision, the lateral vehicle structure S intruding into the vehicle interior itself can effect such a movement of the motor vehicle occupant I, whereby the action of the lateral body structure S is transmitted to the pool area B of the vehicle occupant I via the seat-integrated inflatable element 3 and thereby is dampened.
  • FIG. 3 shows, by way of example, an inflatable element 2 'which is arranged independently of the seatbelt in the motor vehicle and extends between the lateral body structure S and the pelvic region B of the vehicle occupant to be protected when filled with gas.
  • an inflatable element 2 ' can be realized, for example, as an extension projecting downwards from a side airbag A (in the form of an additional chamber 2' of the side airbag A).
  • filling of the inflatable element 2 ' may only be provided when a collision actually occurs-detected, for example, by an acceleration sensor.
  • the variant shown in FIG. 3 is independent of the invention described with reference to FIGS. 1a to 2b.
  • Both the seat cushion-integrated inflatable element 12 and the seat belt-integrated inflatable element 3 are preferably designed to be reversible, so that they form after the discharge of the respectively associated inflator 15 and 45 filled gases back to their original shape and geometry. This will be described in more detail below with reference to FIGS. 4a to 8.
  • the respective inflatable element 3, 12 for this purpose comprise an inflatable rubber bubble, which returns to its original shape and geometry after draining previously filled gases due to their inherent elasticity or correspondingly regresses.
  • the respective inflatable element 3, 12 based on a tissue, in particular a so-called “knitted cross-woven tube", z.
  • a tissue in particular a so-called “knitted cross-woven tube", z.
  • polyamide threads which has the property or to shorten along a longitudinal direction, when along another direction (by an overpressure caused by the filling with gas) an expansion is effected.
  • Such a fabric may, for example, be sealed by coating with an elastic material (elastic silicone), wherein the coating used for sealing may be chosen so as to promote a recovery of the inflatable element to its original shape after the discharge of gas.
  • the inflators 15, 45 which serve to inflate said inflatable elements 3, 12, are each coupled with a pre-crash sensor (eg 48) for their activation and designed as a compressed gas reservoir from which compressed gas is used to fill the respective one inflatable element 3, 12 can be removed.
  • a pre-crash sensor eg 48
  • only one inflator with a single compressed gas reservoir can be provided, from which gas can be taken for filling the one and / or other inflatable element 3 or 12 by means of at least two (controllable) valves.
  • an in-vehicle compressor may be used, or the compressed gas storage forming the respective inflator 15, 45 is refilled by externally supplied (possibly liquefied) gas.
  • a seat cushion integrated inflatable element 12 below the legs of a vehicle occupant I also serve to prevent immersion of the vehicle occupant I under the lap belt section 22 (so-called "anti-submarining").
  • a seat-integrated inflatable element 12 is always filled with gas as part of a seat cushion 10 and emptied upon detection of a collision risk or a special driving situation (eg., By means of a pre-crash sensor).
  • a collision risk or a special driving situation e.g., By means of a pre-crash sensor.
  • the vehicle occupant I due to its own weight sinks deeper into the seat 1, more precisely the seat cushion 10, and is thus more strongly coupled to this. This reduces the extent of a relative movement of the vehicle occupant I against the collision direction to the vehicle seat 1 and the vehicle structure and thus reduces the risk of injury to the occupant I.
  • the sinking of the occupant I in the seat of the seat cushion 10 can be actively supported and accelerated by tightening the seat belt 2.
  • a tightening can be effected, for example, in the usual way by a belt retractor 29 in the shoulder belt area or by a safety belt-integrated inflatable element 3.
  • the function of providing a sinking of a vehicle occupant I into a seat cushion 10 by emptying an inflatable element 12 integrated in the seat cushion 10, independently of the integration of an inflatable element 3 into the seat belt 2, is also feasible.
  • D. h. The above-described functionality of sinking of the vehicle occupant I can also be used without a seat belt integrated inflatable element.
  • An inflatable element 12 may optionally also improve the seating comfort of a vehicle seat, with a reduction of the cushion pressure also providing improved lateral guidance through the seat cheeks in certain driving situations, such as, for example, driving. B. fast cornering, can cause.
  • FIG. 2b shows, by way of example, the arrangement from FIG. 2a, after all gases have been discharged from the seat-integrated inflatable element 12 by means of the outlet valve 19 provided for this purpose and the seat-integrated inflatable element 12 has returned to its original state.
  • the previously filled gas has also been discharged from the safety belt-integrated inflatable element 3 according to FIG. 2b, and the inflatable element in particular using an exhaust valve 39 provided for this purpose, cf. FIG. 2a, and the inflatable element 3 is again in its in The initial shape and geometry shown in Figures 1 a and 1 b returned, in which it is available for re-use by filling by means of the associated inflator 45.
  • FIG. 2b shows one-triggered by an acceleration sensor-only when a collision actually occurs between the upper body O of the vehicle occupant I and the side body airbag A deploying the lateral body structure S.
  • FIG. 4a in conjunction with Figure 4c, a first concrete embodiment of an inflatable element 3 is shown, the z. B. as seat belt integrated or seat cushion integrated element can be used in one of the arrangements of Figures 1a to 3.
  • the inflatable element 3 is formed according to the figures 4a and 4c as an elongated, tubular element which is formed by a fabric 30, which bulges when filling the inflatable element 3 with gas, according to an increase of the internal pressure p, while along along a longitudinal direction of extension I contracts, as shown by the transition from Figure 4a to Figure 4b.
  • the fabric 30 used to form the inflatable element 3 and shortening in the longitudinal direction I can in particular be a so-called knitted cross fabric (for example made of polyamide yarns), as described in greater detail above and as described, for example, in US Pat US-A 5,322,322 and US-A 5,839,753 is given.
  • a knitted cross fabric for example made of polyamide yarns
  • the fabric 30 forming the inflatable element 3 is provided with a coating 31 or 32 on its two surfaces, ie both on the surface facing the exterior and on the surface facing the interior of the inflatable element 3 such that the fabric 30 is substantially gas-tightly closed and an overpressure built up inside the inflatable element 3 (by the introduction of gas) can be maintained until the gas is discharged from the inflatable element 3 again, for instance using an outlet valve ,
  • the respective coating 31, 32 may also be designed so that a certain gas permeability is provided, so that the internal pressure of the filled inflatable element 3 tends to decrease over time.
  • the final emptying of the inflatable element 3 after filling is preferably carried out by a vent opening provided for this purpose, for. B. in the form of an exhaust valve.
  • the fabric 30 is made, for example, as a circular knit nylon fabric that shortens in the longitudinal direction I as the circumferential expansion increases, which is the case when filling the inflatable element 3 with gas.
  • the fabric 3 is made, for example, as a circular knit nylon fabric that shortens in the longitudinal direction I as the circumferential expansion increases, which is the case when filling the inflatable element 3 with gas.
  • other materials for forming the fabric 3 are usable; especially suitable materials are those which experience a substantial reduction in the longitudinal direction I when stretched in the circumferential direction.
  • Figure 5 shows a modification of the embodiment of Figures 4a to 4c, in which case the inflatable element 3 shown in cross-section in turn shortened by a stretching in the circumferential direction at the same time in the longitudinal direction
  • Fabric 30 is formed. This is here on his the interior of the inflatable
  • Silicone film provided to provide a substantially gas-tight sealed interior of the inflatable element 3.
  • an adhesive 33 a, z is an adhesive 33 a, z.
  • a diffuseused by the tissue 30
  • Tissue 30 is used, can be made so elastic that it tends to bring the inflatable element 3 in its (tubular) initial or basic shape, as shown in Figure 4a for a cross-sectionally substantially circular tube and in Figure 5 for a cross-sectionally flat hose is shown.
  • the expansion of the respective inflatable element 3 in the circumferential direction when filled with gas then takes place in each case against the elastic action of the outer shell of the elastic element, which is provided by the fabric 3 and the thereto
  • Coating 31, 32 or film 30 is formed. After draining gas from the
  • FIG. 6 a shows an exemplary embodiment of an inflatable element 3, which is formed by an outer tissue 30 which shortens along a longitudinal direction when filled with gas and an inflatable body 4 which is arranged within the space enclosed by the tissue 3.
  • the inflatable body 4 is substantially gas-tight and thus serves to provide an internal space of the inflatable element 3, which can maintain an overpressure built up by filling with gas.
  • the inflatable body 4 may be made of a material that tends to revert to a tubular initial state as shown in FIG. 6a when no internal compressive forces impose a different shape on the inflatable body 4.
  • the inflatable body 4 may be formed, for example, by a rubber bladder, that is to say an inflatable body made of rubber.
  • the inflatable body 4 can also be formed by conventional airbag fabric, which is provided with an elastic coating or foil.
  • FIG. 6b shows a further development of the exemplary embodiment from FIG. 6a, in which the outer fabric 30, which is shortened when filled with gas, is additionally enclosed by a protective cover 5.
  • FIG. 7a shows, by way of example, the integration of an inflatable element 3 in a seatbelt 2, more precisely in its lap belt section 22, for example.
  • the inflatable element 3 is inserted in such a way that its longitudinal direction I coincides with the extension direction of the corresponding section 22 of the safety belt 2.
  • a fabric 30, which defines the inflatable element 3 and is shortened during inflation along the longitudinal direction I, is applied to the seat belt between the two sections 22a, 22s.
  • the inflatable element 3 can be connected in each case to one of the partial sections 22a, 22s (of the lap belt section 22) of the safety belt 2 only in the region of its two front sides (ends 30a, 30b) which are spaced apart from one another along the longitudinal direction I.
  • the considered portion 22 of the seat belt 2 may be interrupted in the region lying between the two sections 22a, 22s and is replaced there by the inflatable element 3, which with its end faces 30a, 30b formed by the fabric 30 each with one of Partial areas 22a, 22s is connected.
  • respective partial sections 22a, 22s of the safety belt 2 can, on the one hand, merge seamlessly (forming a one-piece fabric) into the fabric 30 of the inflatable element 3 or the inflatable element 3 can at its end faces 30a, 30b respectively at the corresponding partial section 22a, 22s of the seat belt 2 attached in any other way, z. B. sewn be.
  • the sections 22a, 22b must under no circumstances in both cases be a flexible belt area of the seatbelt 2, ie webbing; Rather, one of the two sections 22a, 22b can also be formed by a rigid belt element which serves to fix the seatbelt 2 (to the body), e.g. by means of a so-called belt hook, cf. the arrangement according to FIGS. 1 a to 2 b, where a rigid belt element, which leads to the fixing point 25 on the vehicle floor, can depart directly from the inflatable element 3. On the other hand, however, even between the inflatable element 3 and leading to the fixation point 25 rigid strap element something (flexible, tightenable) webbing run.
  • the inflatable element 3 should (directly or indirectly) be connected to at least one elastic (tightenable) belt area (webbing) and act on it during inflation (tightening).
  • a gas-tight inflatable body 4 Within the area enclosed by the fabric 30 of the inflatable element 3 is a gas-tight inflatable body 4, in which when filling the inflatable element 3 with gas that gas is admitted, so that the
  • elastic elements 6a, 6b (return means or restoring elements in the form of spring elements) are provided, as with reference to Figure 7a and the associated cross-section of In the present case, these are curved spring elements whose curvature increases as the elastic element 3 or, more precisely, the outer fabric 30 is shortened in the longitudinal direction I, so that those elastic elements 6a, 6b tend to have the inflatable element 3 or its outer fabric 30 to be expanded again by a force F along the longitudinal direction I.
  • the elastic elements 6a, 6b (restoring means) can here consist of plastic or of (light) metal, for example.
  • the force F thus counteracts a shortening of the inflatable element 3 and the outer fabric 30. (The forces F produced by the elastic elements 6a, 6b thus act exactly opposite to the direction along which the inflatable element 3 contracts when filling with gas for length reduction.)
  • the spring constant of the elastic elements 6a, 6b is to be chosen so that, on the one hand, a sufficient shortening of the inflatable element 3 or of the outer one
  • the elastic elements 6a, 6b need not act directly on the outer fabric 30 of the inflatable element 3, but they may optionally act with their restoring force F on the inflatable body 4 or a protective cover surrounding the inflatable element 3. As a rule, all components of the elastic element 3 will move back together under the action of the restoring forces F into their starting position and geometry. If necessary, the said components of the inflatable element 3 can be connected to each other for this purpose, for. B. by gluing or sewing. In particular, in the arrangement shown in Figures 7a and 7b, in which the elastic elements 6a, 6b are within the Aufblas emotionss 4, these act appropriately on the inflatable body 4 on the outer fabric 30 of the inflatable element 3 a.
  • FIG. 7 c shows a cross section through a modified embodiment in which the elastic elements 6 a, 6 b lie within the space enclosed by the outer fabric 30, but outside the space enclosed by the inflatable body 4, so that the elastic elements 6 a, 6 b (restoring means or restraining means) Reset elements) act in this case, rather on the outer fabric 30.
  • Figure 8 shows a modification of the embodiments of Figures 7a to 7c, according to which the inflatable body 4 'is not formed by a rubber body, but by conventional (substantially inelastic) airbag fabric.
  • the inflatable body 4 'in the initial state shown in Figure 8 is placed in folds 40a, 40b and unfolds when filled with gas and the associated inflation.
  • the areas to be folded 40a, 40b of the inflatable body 4' are replaced by an elastic return element, e.g. , B. in the form of an elastic band (rubber band), connected together.
  • an elastic return element e.g. , B. in the form of an elastic band (rubber band)
  • the reversible arrangement of the occupant protection device is in particular such that the inflatable element 3 after filling with gas and a later
  • the associated inflator in particular in the form of a pressure accumulator, can be designed so that they after draining
  • Gas for filling the inflatable element (automatically) is made available again with the previously existing gas pressure, such as by a with the
  • Pressure gas reservoir of the inflator repeatedly brings to a minimum level, which is required for proper filling of the associated inflatable element.
  • the discharge of gas from the previously inflated inflatable element advantageously takes place automatically, eg. B. via a (controllable / switchable) exhaust valve.
  • the occupant protection device has the advantage that it is automatically returned to a state in which it is available for a renewed protective effect in the event of a crash in the event of a collision which is judged to be probable by means of a pre-crash sensor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un dispositif de protection d'un passager d'un véhicule automobile, comprenant une ceinture de sécurité associée à un siège de véhicule conformément à l'usage prévu et de manière qu'un passager assis sur le siège soit retenu si des forces externes dues à une collision agissent sur le siège de véhicule, et un élément gonflable qui est relié à la ceinture de sécurité, se remplit de gaz pour protéger le passager assis sur le siège et, à l'état rempli, forme un coussin de gaz agissant sur la région du bassin du passager, ainsi qu'un dispositif de gonflage pour fournir le gaz destiné à remplir l'élément gonflable. Selon l'invention, le dispositif de gonflage (45) est couplé à un capteur de collision prédictif (48) qui active le dispositif de gonflage (45) pour remplir l'élément gonflable (3) lorsque le capteur de collision prédictif (48) détecte un risque de collision imminente avec un objet tiers.
PCT/EP2008/052257 2007-03-15 2008-02-25 Dispositif de protection d'un passager d'un véhicule automobile WO2008110448A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013105A DE102007013105A1 (de) 2007-03-15 2007-03-15 Insassenschutzeinrichtung für einen Insassen eines Kraftfahrzeugs
DE102007013105.6 2007-03-15

Publications (1)

Publication Number Publication Date
WO2008110448A1 true WO2008110448A1 (fr) 2008-09-18

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Cited By (5)

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US8459690B2 (en) 2008-07-15 2013-06-11 Takata AG Vehicle seat arrangement and airbag arrangement for a motor vehicle and a method for protecting a vehicle occupant
US8474862B2 (en) 2007-03-15 2013-07-02 Takata AG Motor vehicle seat arrangement and method for protecting a vehicle occupant
WO2015132344A1 (fr) * 2014-03-07 2015-09-11 Autoliv Development Ab Dispositif de ceinture de sécurité pour véhicule automobile
WO2016173990A1 (fr) * 2015-04-27 2016-11-03 Bayerische Motoren Werke Aktiengesellschaft Dispositif de retenue de sécurité et de confort pour un occupant d'un véhicule et procédé de fonctionnement de ce dispositif
US11318904B2 (en) * 2018-10-22 2022-05-03 Toyoda Gosei Co., Ltd. Occupant protection device

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DE102010014029B4 (de) * 2010-04-06 2014-06-26 Autoliv Development Ab Rückhaltesystem und Verfahren zur Ansteuerung eines Rückhaltesystems für Kraftfahrzeuge
DE102016214374A1 (de) 2016-08-03 2018-02-08 Volkswagen Aktiengesellschaft Sicherheitsgurteinrichtung für ein Fahrzeug
DE102016214876A1 (de) 2016-08-10 2018-02-15 Volkswagen Aktiengesellschaft Sicherheitsgurteinrichtung für ein Fahrzeug
DE102017212035B4 (de) * 2017-07-13 2022-02-17 Joyson Safety Systems Germany Gmbh Schutzvorrichtung für ein Kraftfahrzeug

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US8474862B2 (en) 2007-03-15 2013-07-02 Takata AG Motor vehicle seat arrangement and method for protecting a vehicle occupant
US8459690B2 (en) 2008-07-15 2013-06-11 Takata AG Vehicle seat arrangement and airbag arrangement for a motor vehicle and a method for protecting a vehicle occupant
WO2015132344A1 (fr) * 2014-03-07 2015-09-11 Autoliv Development Ab Dispositif de ceinture de sécurité pour véhicule automobile
WO2016173990A1 (fr) * 2015-04-27 2016-11-03 Bayerische Motoren Werke Aktiengesellschaft Dispositif de retenue de sécurité et de confort pour un occupant d'un véhicule et procédé de fonctionnement de ce dispositif
US10906491B2 (en) 2015-04-27 2021-02-02 Bayerische Motoren Werke Aktiengesellschaft Safety and comfort restraining device for a vehicle occupant and method for operating said device
US11318904B2 (en) * 2018-10-22 2022-05-03 Toyoda Gosei Co., Ltd. Occupant protection device

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