EP1159164A1 - Restraining device for people in a motor vehicle - Google Patents
Restraining device for people in a motor vehicleInfo
- Publication number
- EP1159164A1 EP1159164A1 EP00989924A EP00989924A EP1159164A1 EP 1159164 A1 EP1159164 A1 EP 1159164A1 EP 00989924 A EP00989924 A EP 00989924A EP 00989924 A EP00989924 A EP 00989924A EP 1159164 A1 EP1159164 A1 EP 1159164A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- airbag
- cushion
- gas
- restraint device
- compressed
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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
- B60R21/20—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
-
- 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
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R21/045—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the instrument panel or dashboard
-
- 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
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R21/05—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the steering wheel, steering hand lever or steering column
-
- 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
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
-
- 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
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R2021/21525—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member the lid being fixed on the bag, or forming part of the bag wall, or the bag itself being used as wall liner
-
- 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
- B60R2021/23169—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for knee protection
-
- 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
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
- B60R21/206—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards in the lower part of dashboards, e.g. for protecting the knees
Definitions
- the present invention relates to a personal restraint device for the passenger compartment of a motor vehicle, with at least one impact protection element and a trigger device that actuates the impact protection element in the event of an impact.
- the invention further relates to a method for triggering personal restraint devices in a motor vehicle
- Airbag systems are most widely used as occupant safety systems with impact protection elements.
- the actual impact protection element of such an airbag system is formed by a sack or a cushion which is acted upon by gas in the event of a collision by a generally pyrotechnic gas generator.
- the actuation, ie the gas filling the impact protection element takes place sufficiently quickly, so that in the event of a collision the impact of the sometimes violently accelerated occupants is considerably dampened.
- the advantage of the aforementioned airbag systems lies particularly in the reliable protection of the occupants in the event of an accident from the consequences of the primary impact, which in most cases releases the greatest impact energy.
- recent studies show that more than 20% of all accidents involve multiple collisions in which the primary impact is followed by one or more further collisions.These are generally weaker than the pnm collisions, but they still have a considerable risk potential for the occupants.
- the aforementioned airbag systems according to the prior art have practical effects once the impact protection element has been exposed to gas No more shock-absorbing effect This has the consequence that the vehicle occupants following collisions in a multiple collision are largely unprotected and there is therefore a high risk of injury from contact with hard components of the vehicle interior.
- This risk la t is only to a small extent by a soft Reduce the coating of hard objects, such as the steering wheel, because the shock-absorbing effect that can be achieved is relatively low
- a personal restraint device as a safety device for the passenger compartment of a motor vehicle is already known, which has at least one impact protection element and a triggering device that actuates the impact protection element in the event of a collision, the impact protection element compressing at least one in the non-activated basic state of the triggering device Has security cushion which can be released by the release device for expansion
- the safety cushion is shown here in connection with a child seat, which has a body serving as a safety catch, which encloses a cavity into which a safety cushion is inserted and received in a compressed manner in the non-activated basic state of the personal restraint device in the event of an activation taking place in a crash situation the personal restraint device can expel this safety cushion through expansion that can be formed in the catch body during expansion and serve as impact protection for the child sitting in the child seat.
- An inflatable airbag can be embedded in the safety cushion, which can be acted upon with a gas when the person restraint device is activated and as a result, the force required for the safety cushion to emerge from the catching body can be applied.
- the activation of the safety cushion is also associated with the child seat by means of an information line possible belt tensioner system possible
- a disadvantage of this structure is that the safety cushion has to be installed by a worker while compressing the cushion, which is obviously labor-intensive and time-consuming.
- Such an assembly effort is necessary for the large-scale production of motor vehicles in connection with personal restraint devices for the passenger cell of a motor vehicle, however, is only slightly or not at all practical, since this leads to undesirable long assembly times, which in turn increases the assembly costs
- a similar structure is also known from US Pat. No. 3,853,334, in which a plurality of cushion parts are arranged in a compressed state in the basic state in the area of a steering wheel hub.
- the hub cover holds the cushion parts in the compressed basic state here.
- a pressure fluid flows into the compressed cushion parts via a pressure line containing receiving space introduced to burst open the hub cover so that the upholstery parts can ooze out under expansion through a release.
- the upholstery parts are collected in an activated and expanded state together with the pressure fluid in a sack.
- the complex assembly is disadvantageous, since the upholstery parts are part of the Assembly must be introduced under compression
- the structure with pressure fluid in connection with upholstery parts is relatively complex and therefore not very practical
- Another conventional structure of a personal restraint device with an airbag and a non-compressible safety cushion is also known from DE 297 16 534 U1.
- a first airbag is inflated, this airbag being shaped in such a way that between the surface of the safety cushion and After filling, an underside of the airbag has a space for another airbag, which is folded around the safety cushion in such a way that, after the ignition of a correspondingly assigned gas generator, the space is filled by the further airbag additional airbag thus serves as an extended impact cushion protection over the safety cushion.
- Such a structure is obviously complex and therefore not very practical
- an energy absorber which has an essentially gas-tight shell which surrounds a full material and is provided with at least one feed line which is connected to a vacuum source.
- a hard energy absorber becomes At the same time, the negative pressure ensures that the generally flexible shell of the energy absorber retains its shape even in the event of an impact load.
- a foam replacement in the interior and exterior of the vehicle is particularly suitable.
- This energy absorber can be used, for example, as a bumper, as a knee pad or possible as upholstery in the door / pillar area An expansion of the full material is not intended here
- an airbag module for motor vehicles in the lower region of a control panel of the motor vehicle which has a knee protector plate designed as a load distribution plate, behind which an airbag is arranged folded.
- the airbag is activated in the event of a collision of the vehicle by activating a gas generator inflated
- the knee protector plate detaches from the control panel and is moved in the direction of the knee of an occupant of the vehicle.
- the knee protector plate intercepts the occupant's knee through the resilient knee protector plate in front of the airbag and a hard impact on vehicle interior parts is avoided
- the airbag is inflated during a pneumatic collision, the gas flows out of the airbag and the airbag collapses, so that the airbag is no longer available as an energy absorber in the event of a subsequent collision
- an airbag module with the elements just described is also known from EP 0 891 901 A1, in which the knee protector plate of the airbag module is additionally made from flexible hard foam. After the gas has flowed out of the airbag after the pnm collision, the knee protector plate then acts as an energy absorber Impact of the knee on the knee protector plate if there is another collision after the PN collision.
- the knee's damping during the secondary impact is solely dependent on the energy absorption capacity of the knee protector plate, since the airbag is deflated during the secondary impact.
- the knee protector plate is effective when the Knee as a load distributor to increase the impact area The absorption capacity of the knee protector plate is limited
- the object of the invention is to provide a personal restraint device for the passenger compartment of a motor vehicle, which is quick and easy to assemble, in particular in the context of large-scale production with little effort and time, and provides effective impact protection in the event of collisions
- the safety cushion in the compressed state is enclosed in a sleeve, which releases the safety cushion in the activated state of the release device for expansion
- the safety cushion is held together by the cover under mechanical pretension in the compressed state in a relatively small volume, so that the safety cushion can be installed at a predetermined location in a relatively simple and quick manner without the compression of the safety cushion during the Installation must be carried out by yourself.
- a particular advantage of this construction is that the safety cushion can be made available as a simple and quick-to-install pre-assembly module
- the safety cushion according to the invention has only a fraction of its expanded volume.This allows it to be quickly and inconspicuously integrated into the vehicle interior in a space-saving manner.
- this safety cushion is preferably mechanically released so that it returns to its original, full volume in the relaxed state If an impact is again applied to this safety cushion from the outside, for example due to the impact of vehicle occupants in the event of a collision, the material is briefly compressed and thereby absorbs the impact energy.In any case, the force of the impact is damped far better than simply by a thin coating of hard surfaces In this way, an improved occupant protection against injury is already achieved
- Another special feature of the impact protection element lies in the fact that it consists of a material which can be compressed to a smaller volume by the action of external forces and which expands again to its original volume without the need for the supply of external energy. This is essential Difference to the known airbags, which have their shock-absorbing effect only once briefly after the gas is applied by the gas generator of the triggering device. In contrast
- the safety cushion Due to the special, previously described ability of the safety cushion to automatically expand to its original volume due to the internal elasticity of its material, it has regained its full shock-absorbing property shortly after being subjected to an impact, for example after a passenger impact has been dampened
- the function of airbags is thus given several times in succession, so that occupant protection in the event of multiple collisions is significantly improved
- the safety cushion is preferably designed as a foam cushion made of compressible foam, for example made of open-pore plastic foam.
- foam cushion made of compressible foam, for example made of open-pore plastic foam.
- Such modern foam materials can be compressed to a particularly high degree and, even after a long period of time in this compressed state, reliably expand again to their original volume.
- the energy absorption capacity, i.e. the shock-absorbing effect is Particularly good with open-pore foam
- the impact energy is essentially converted into flow friction of the pressed-out air, so that the foam itself is not permanently compressed, but regenerates within a short time due to its internal elasticity, ie it recovers its original volume and its full shock-absorbing capacity Effect is fully available again
- the expansion rate of foam cushions is lower, but in combination with fast airbags they offer very good protection against collision injuries in the event of secondary collisions occurring later.
- the use of safety cushions according to the invention is also conceivable in such areas of the vehicle interior , where the use of an airbag is not appropriate or experience has shown that the hazard potential is lower, for example because the impact energy is usually lower or there places with which occupants experience, in the event of an accident, only come into contact later
- the safety cushion is enclosed in an easily destructible cover in the compressed state.
- This cover can be designed, for example, as a foal cover made of plastic film or as a net made of plastic.
- the safety cushion is held together by the cover in a relatively small volume under mechanical pretension This mechanical pretension bursts the cover completely as soon as it is even injured at one point.
- easily destructible materials for example a plastic film, which can absorb the holding forces well, but then tears completely in the event of slight damage
- the safety cushion according to the invention can expand easily with appropriate release means, ie released for expansion by destroying the halyard. This achieves particularly good pretensioning of the cushion to a very small installation volume that the safety cushion, which is preferably made of plastic foam, is welded into the foal envelope during manufacture under vacuum
- the release device has separating means for destroying the cover.
- This can be, for example, drivable cutting means such as mandrels, cutters, blades or the like, which cut or cover the cover when actuated by pricking, whereby a tearing point is formed, which leads to the further tearing of the casing and to the release of the safety cushion which protrudes under mechanical tension
- the release agents can, for example, be mechanically accelerated, ie driven, by a pyrotechnically triggerable gas generator.
- gas generators have long been used reliably in vehicle safety devices, for example in belt tensioners and pyrotechnic safety switches.
- the hot gas escaping causes the material of the sheath, for example the plastic film, to be locally melted or melted on, so that it bursts open again in the manner described above and releases the safety cushion for expansion
- a particularly advantageous integration of the safety cushions according to the invention into existing vehicle safety systems provides that the triggering device of the safety cushion can be actuated via an airbag which can be acted upon pyrotechnically.
- Such an airbag has a gas bag which, when triggered, is filled within a very short time by a pyrotechnic gas generator with the combustion gases then generated is and acts as a cushioning cushion for an impact.
- a gas bag which, when triggered, is filled within a very short time by a pyrotechnic gas generator with the combustion gases then generated is and acts as a cushioning cushion for an impact.
- These systems have the advantages mentioned at the outset of being able to offer particularly effective impact protection very quickly in the event of a collision, but this is offset by the disadvantage that they only offer one-time impact protection.
- the safety cushion according to the invention is forcibly drawn when the airbag is activated.
- release agents are attached, for example, directly to the gas bag of the airbag Eight for mechanical severing of the aforementioned cover, which act on the cover when it is pressurized with gas.
- movably mounted cutting edges, spikes or the like which are displaced, ie driven, by the expanding airbag of the airbag against the
- An alternative embodiment provides that the H thoroughlygasaust ⁇ tt of the airbag gas generator is directed to the shell, so that when the airbag is activated, the hulie of the safety cushion according to the invention is thermally destroyed in the manner described above.
- This variant has the advantage, on the one hand, that none Additional moving parts are required.
- Another advantage is that the expansion of the foam cushion is supported or accelerated again by the escaping gas
- the safety cushion according to the invention is preferably accommodated in the airbag housing.
- the combination with the airbag module provides particularly effective protection in the event of multiple collisions.
- the first impact which as a rule is particularly hard, is absorbed by the airbag's airbag while simultaneously being triggered by
- the energy-absorbing effect of the safety cushions according to the invention for a subsequent impact in a multiple collision is already fully available.
- the security cushion is then attached under a removable cover, which is laterally pushed away or folded away or released from its anchoring in the draw.
- the cover on the housing can be clipped so that it expands from the clipping when the safety cushion is expanded is drawn and printed away
- the safety cushion can be attached to the steering wheel hub of a motor vehicle. It is then expediently designed in the form of a ring or segment or as a flat, preferably round cushion, which is fastened, for example, to the baffle of the steering wheel and especially the Covers opening of the airbag
- the restraint device is arranged in the leg area of a vehicle occupant in a motor vehicle and comprises at least one airbag, at least one gas generator for inflating the at least one airbag and a load distribution plate which is displaced towards the leg space by inflating the at least one airbag, wherein The at least one compressed cushion expands after the gas generator has been released.
- the compressed cushion is preferably arranged on the side of the load distribution plate facing away from the leg space, which is preferably elastically deformable.
- the gas generator is released and inflates the gas bag, which in turn inflates the load distribution plate moves towards the leg area in the motor vehicle interior
- the compressed cushion also expands.
- the gas bag falls because of the escaping gas together and the expanded cushion can now absorb energy e.g. during one or more further collisions.
- the cushion is compressed, it takes up very little space, so that the installation depth of the installation module increases insignificantly compared to an airbag module without a compressed cushion This does not affect the occupant's legroom
- the airbag module can also contain several gas generators, e.g. to prolong the inflated condition of the gas bag during a primary impact in the event of a collision with a flexible obstacle.
- the load distribution plate can be held in the leg area of the vehicle, for example, by tether after the primary impact so that it a subsequent collision between the occupant's legs and rigid components in the knee impact area
- the load distribution plate can be an elastic plate, e.g. made of hard foam, which deforms elastically in the event of an impact and thereby itself absorbs part of the impact energy and also distributes it over a larger area.
- the load distribution plate is designed as a cover plate that positively engages the airbag module in the lower part Area of the control panel or the dashboard cladding, the airbag module, for example, can be integrated on the driver's side or on the passenger's side
- the compressed cushion is arranged inside the airbag, so that the expansion of the cushion takes place simultaneously with the expansion of the airbag.
- Small cushion parts or particles can be used, so that after the airbag module has been triggered, the surface of the cushion is very large is large and the expansion of the cushion takes place quickly
- the advantageous arrangement of the at least one compressed cushion in the area next to an opening of a folded airbag ensures that the cushion is independent of the position of the airbag during inflation and after the airbag has collapsed.
- the cushion or cushions can therefore be independent of the airbag an area where there is a risk of impact is also provided.
- the function and mode of operation of the airbag are not restricted or changed by the upholstery. It is therefore possible to provide an airbag, for example for the front passenger, which extends to the upper body of the front passenger. The effect of the expanded upholstery is reversed by does not affect the condition of the airbag
- part of the gas flow generated by an airbag gas generator can also flow past the film via a gas channel, preferably via gas through-openings, the gas then preferably also being introduced back into the gas bag.
- a gas channel preferably via gas through-openings
- the gas then preferably also being introduced back into the gas bag.
- the at least one cushion covers at least the area of the exit opening in the expanded state.
- the at least one cushion preferably covers the entire impact area, if possible. This provides effective impact protection for a secondary collision and, if necessary, further subsequent collisions
- the invention In combination with an airbag that can be acted upon once or in multiple stages in the event of a collision with gas, the invention is particularly well suited for implementing multiple collision protection and thus for reducing the consequences of secondary collisions.
- the method according to the invention for operating such a multiple collision protection device provides that the draw an airbag, a compressed safety cushion, which is preferably formed from automatically expandable material, is released for expansion according to the invention in this way, the airbag ensures quick and safe protection against the impact of a pnm collision, while the somewhat slower expanding safety cushion unites ensure effective occupant impact protection in subsequent secondary collisions
- the advantages of the automatically unfolding safety cushion are that no additional energy sources are required for activation. Combination with existing safety systems, for example airbags, means that no additional acceleration sensors are required to detect a collision
- the relatively slow expansion of the safety cushion according to the invention compared to the airbag has the further advantage that there is practically no risk of injury due to an explosive deployment, as sometimes occurs, especially in children, in airbags
- FIG. 1 shows a schematic sectional illustration of a driver airbag module with a safety cushion according to the invention
- 2 shows a front view of the airbag module according to FIG. 1
- FIG. 2 shows a detailed representation of the airbag module according to FIG. 1 in a first variant
- FIG. 1 shows a cross-sectional view of a knee airbag module in the lower region of a control panel
- FIG. 6 shows a detailed view of the knee airbag module from FIG. 6 in a first embodiment
- FIG. 6 shows a detailed view of the knee airbag module from FIG. 6 in a second embodiment
- FIG. 6 shows a cross-sectional view of the knee airbag module of FIG. 6 after activation
- FIG. 2 shows a cross-sectional view of a knee airbag module according to a third embodiment
- FIG. 1 shows a schematic cross-sectional view of a first embodiment of a restraint system in a control panel on the passenger side of a motor vehicle
- FIG. 12 shows a plan view of an expanded cushion of the restraint system from FIG. 12,
- FIG. 2 shows a schematic cross-sectional view of a second embodiment of the restraint system from FIG. 12 in detail
- FIG. 1 a schematic cross-sectional view of a third embodiment of a restraint system 1 shows a steering wheel unit of a passenger vehicle as a whole, shown schematically in section and provided with the reference number 1.
- a steering wheel hub 3 is attached to a steering column 2 and carries a steering wheel rim 4
- An airbag module 5 is located in the interior of the steering wheel hub 3.
- the airbag module 5 has a gas generator 6, by means of which a gas bag 8, shown folded together, can be acted upon by gas via a diffuser 7
- the reference numeral 9 denotes a safety cushion made of open-pore plastic foam, which is welded into a plastic foam shell in the compressed state.
- the compressed safety cushion 9a is shown in dotted lines. Furthermore, there are 5 release agents in the airbag module in the form of pivotable spikes
- FIG. 2 shows a front view of the steering wheel 1 according to FIG. 1 using the same reference numerals.
- the safety cushion 9 according to the invention can then be clearly seen, namely once in the compressed state 9a shown in broken lines and in the expanded state 9b shown with hatched lines.
- this safety cushion 9a / b be designed as a one-part ring or in several parts
- the airbag module 5 according to FIG. 1 is shown enlarged again in FIG. 3, the same reference numerals being used.
- FIG. 4 shows, in the same representation as FIG. 3, a further embodiment of an airbag module 5 according to the invention.
- no mechanical separating means are provided here. Instead, the hot gas flow from the gas generator 6 is passed through hot gas channels 12 onto the foils
- the airbag 8 emerges laterally upwards or downwards from the steering wheel hub.
- Mechanical separating means are again provided in the form of a thorn plate 10 that can be displaced by the airbag 8.
- the safety cushion 9 forms a round, Flat cushion, which is attached axially on the hub below a hub cover 13 This hub cover 13 is laterally detachably held with a clip connection 12a.
- the attachment of the hub cover 13 is loosened and moved with the cushion so that the expanded safety cushion 9b shown in dashed lines is available as impact protection
- FIG. 6 schematically shows a cross-sectional view of a knee airbag module 1 '.
- the knee airbag module V is integrated in the lower region, ie in the leg region, of a control panel 2' of a motor vehicle.
- a cover 3' a folded gas bag 4 'is arranged on the cover 3'.
- An inlet opening of the gas bag 4 ' is open to a gas generator 5'
- a compressed foam pad 7 ' is arranged between the folded gas bag 4' and a base plate 6 'of the knee airbag module 1' around the gas inlet opening of the gas bag 4 '.
- the gas generator 5', the foam pad T and the gas bag 4 ' are pre-assembled on the base plate 6' , so that the airbag module is installed as a compact unit in the lower region of the control panel 2 '.
- the cover 3' is fastened above this to protect the airbag 4 'from damage
- the foam pad 7 ' is already welded into a plastic sheet 8' (FIG. 7 or 8) in which the foam pad 7 'is evacuated Condition is maintained During the evacuation of the open-pore material of the foam cushion 7 ', the air escapes, so that the foam cushion T can be compressed to a fraction of the volume of its expanded shape
- FIG. 7 shows a detailed view according to a first exemplary embodiment of the knee airbag module 1 'from FIG. 6.
- a mandrel 10' is arranged on the base plate 6 'of the knee airbag module 1' at the outer end of a pivotable lever 9 '.
- the mandrel 10' points in the direction of the foam cushion 7 'When the airbag is released, the gas bag 4' is pressed apart in the region of its gas inlet opening, as a result of which the pivotable lever 9 'is pivoted in the direction of the foam cushion T.
- the mandrel 10' presses into the plastic film 8 'and tears in the process the plastic film 8 ', so that air can penetrate through it.
- FIG. 8 shows a second embodiment of the knee airbag module 1 'shown in FIG. 6'. Openings 11 'are provided in the gas inlet area of the gas bag 4', through which a portion of the gas from the gas generator 5 'flows out of the gas inlet area after the draw and flows in again Gas emerging through the opening 11 'flows past the plastic film 8' and damages it either mechanically by tearing due to the high flow rate or thermally by melting due to the high temperature of the gas. After the film is damaged, air and gas from the gas generator penetrate here the film 8 'and the foam pad 7' expands
- FIG. 9 shows the knee airbag module 1 'of FIG. 6 after activation with the gas bag 4' fully inflated.
- the pressure 3 of the gas bag 4 ' causes the cover 3' to be attached to the control panel 2 'or to the base plate 6 'Detached and moved in the direction of the leg space of the motor vehicle
- the cover 3' is an elastic hard foam plate which distributes the force of the impact of the leg or knee of the occupant evenly over the gas bag 4 'during the puncture collision
- the expansion process of the foam cushion 7' takes place more slowly.
- the volume of the foam cushion 7 ' takes up less space than the volume of the fully expanded gas bag 4'.
- the foam pad 7 ' is retained as an energy absorber for a further impact of the knee or leg
- FIGS. 10 and 11 show cross-sectional views of a knee airbag module according to a third embodiment once before and once after activation of the airbag module.
- the same reference numerals are used
- the parts of the foam cushion 7 ' are enclosed in an airtight manner in the gas bag 4'.
- the parts of the foam cushion 7' are distributed within the inflated gas bag 4 ', as shown in FIG. 11.
- the gas generator 5' generates a cold gas, so that the parts of the foam pad T are not destroyed due to the high gas temperatures.
- the individual parts of the foam pad 7 ' have a large surface area compared to a compact pad. As a result, the expansion process of the foam parts takes place faster by absorbing gas from the gas generator 5' and the particles have expanded before the gas has completely escaped from the gas bag 4 '.
- the volume of the gas bag 4 ' is reduced to the volume which then passes through the foam cushion 7 'is taken when the gas bag is relieved 4' stretches the foam pad 7 'again and, if necessary, draws air back into the gas bag 4'.
- the cover 3' is held in front of rigid components, such as the steering adjustment or the ignition lock, after the gas bag 4 'has collapsed, so that the cover 3 'does not slide down with the air-free gas bag 4'.
- the restraint in a secondary collision occurs only through the foam cushion 7', the identifier of which is preferably softer in this case 12 shows a restraint system for Mehrfachkol sions in a schematic cross-sectional view.
- the restraint system is integrated in a modular design into a control panel 1 "of a motor vehicle on the passenger side.
- a gas generator 3 is arranged in the rear area of the module, which during a Pnmark collision is triggered.
- a folded airbag 4" lies behind an outlet opening 14 "for the airbag 4".
- the gas generator 3 "generates gas which is released through an opening in the airbag 4" the airbag 4 "and opens a cover of the module housing 2"
- the expandable foam cushions 5 In the compressed state, the expandable foam cushions 5 “consist of a compressed and evacuated foam material which is welded into a plastic film 6".
- a lever element 7" is arranged at the outlet opening of the airbag 4 ", which is pivotally mounted on the module housing 2" At least one mandrel pointing in the direction of the foam cushion 5 “is arranged at the outer end of the lever elements 7".
- the pores of the foam material fill with air and the foam material begins to expand, which destroys the remaining film and exposes the expanding cushion.
- the fully expanded cushion 9 " takes up a multiple of the volume of the compressed foam pad 5 ".
- the expanded foam pad 9" are shown schematically as broken lines
- FIG. 13 shows the expanded foam cushions 5 "in a top view of the control panel 1".
- the expanded foam cushions 9 cover the impact area of an occupant on the control panel 1" during a collision and the outlet opening of the airbag 4 ", thereby providing effective impact protection provide secondary or subsequent collisions
- the compressed pads 5 are produced by evacuating the originally expanded, fully expanded pads 9", pressing them into the shape of the compressed pads 5 "and then enclosing them in a cover. After tearing the cover, the pad 5" expands again in its original size and shape. This allows the geometry of the expanded cushion to be precisely defined for the need for impact protection
- FIG. 14 A second embodiment of the restraint system is shown in FIG. 14 in a schematic cross-sectional view, in which case the lever element is replaced by a pivotable housing part 10 "with a plurality of spikes 8".
- the housing part 10 lies over the outlet opening of the airbag 4 'and is pressed by this onto the foam pad 5 "when it is drawn.
- Several mandrels 8" are arranged on the outside of the pivotable housing part 10 ". The mandrels 8" tear the plastic film of the foam pad 5 "at several points, so that the expansion of the compressed foam 1 1 "faster
- FIG. 15 A third embodiment for a restraint system is shown in a schematic cross-sectional view in FIG. 15.
- the gas generated by the gas generator 3 is introduced into the airbag 4" via a diffuser 12 ".
- a small part of the gas generated by the gas generator 3" flows through side gas channels 13 "not directly in the airbag 4" but laterally along the outlet opening of the airbag up to the compressed foam cushion 5 "There the gas hits the plastic film 6" through openings in the gas channels 13 ", which includes the compressed foam 1 1" through the high flow rate of the gas and its high temperature, the plastic film 6 "is damaged and the expansion process of the compressed foam 1 1" described above begins
- the folded airbag 4 is folded into the channel of the outlet opening and the lower edge of the opening of the airbag 4" is fastened to the outer edge of the outlet opening.
- the gas flowing past the foam pads 5 "during the expansion of the airbag 4" also reaches inside , so that the gas previously branched off from the gas generator 3 "also contributes to the expansion of the airbag 4"
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19958152 | 1999-12-03 | ||
DE1999158152 DE19958152B4 (en) | 1999-12-03 | 1999-12-03 | Personal restraint device for a motor vehicle |
DE2000107407 DE10007407B4 (en) | 2000-02-18 | 2000-02-18 | Airbag module for the leg area in a motor vehicle |
DE10007404 | 2000-02-18 | ||
DE2000107404 DE10007404B4 (en) | 2000-02-18 | 2000-02-18 | Restraint system for multiple collisions |
DE10007407 | 2000-02-18 | ||
PCT/EP2000/012006 WO2001040029A1 (en) | 1999-12-03 | 2000-11-30 | Restraining device for people in a motor vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1159164A1 true EP1159164A1 (en) | 2001-12-05 |
Family
ID=27213667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00989924A Withdrawn EP1159164A1 (en) | 1999-12-03 | 2000-11-30 | Restraining device for people in a motor vehicle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1159164A1 (en) |
AU (1) | AU2670601A (en) |
WO (1) | WO2001040029A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1954398C3 (en) * | 1969-10-24 | 1978-06-08 | Ernst Prof. Dipl.-Ing. Dr.Techn. 3180 Wolfsburg Fiala | Impact protection device for vehicle occupants |
US3853334A (en) * | 1972-12-11 | 1974-12-10 | Gen Motors Corp | Occupant restraint system |
DE19545263A1 (en) * | 1995-11-27 | 1997-05-28 | Tietz Concept Fa | Protective cushion for child's seats installed in car |
DE19908637A1 (en) * | 1999-02-27 | 2000-09-21 | Daimler Chrysler Ag | Energy absorber |
-
2000
- 2000-11-30 EP EP00989924A patent/EP1159164A1/en not_active Withdrawn
- 2000-11-30 WO PCT/EP2000/012006 patent/WO2001040029A1/en not_active Application Discontinuation
-
2001
- 2001-11-30 AU AU26706/01A patent/AU2670601A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0140029A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2670601A (en) | 2001-06-12 |
WO2001040029A1 (en) | 2001-06-07 |
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