WO2022122801A1 - Fahrzeuginsassenrückhaltesystem - Google Patents
Fahrzeuginsassenrückhaltesystem Download PDFInfo
- Publication number
- WO2022122801A1 WO2022122801A1 PCT/EP2021/084736 EP2021084736W WO2022122801A1 WO 2022122801 A1 WO2022122801 A1 WO 2022122801A1 EP 2021084736 W EP2021084736 W EP 2021084736W WO 2022122801 A1 WO2022122801 A1 WO 2022122801A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vehicle
- vehicle occupant
- gas bag
- steering wheel
- airbag
- Prior art date
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 210000002414 leg Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—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 the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/01552—Passenger detection systems detecting position of specific human body parts, e.g. face, eyes or hands
-
- 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
- B60R21/214—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in roof panels
-
- 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
- B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
- B60R21/2171—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/183—Steering columns yieldable or adjustable, e.g. tiltable adjustable between in-use and out-of-use positions, e.g. to improve access
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
- B62D1/197—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible incorporating devices for preventing ingress of the steering column into the passengers space in case of accident
-
- 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
- B60R2021/0004—Frontal 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
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
- B60R2021/23382—Internal tether means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
- B60R2021/23386—External tether means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/213—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle roof frames or pillars
Definitions
- the invention relates to a vehicle occupant restraint system with a gas bag module.
- the object of the invention is to create a secure restraining effect for a vehicle occupant on a front seat, in particular for a driver's seat.
- a vehicle occupant restraint system with an airbag module which is arranged in a roof area of a vehicle and is assigned to a front seat, the airbag module comprising an airbag which is arranged in such a way that it unfolds in front of a vehicle occupant on the front seat in the vehicle longitudinal direction, wherein a baffle of When inflated, the airbag is aligned transversely to the longitudinal direction of the vehicle and faces the vehicle occupant.
- the impact surface therefore assumes essentially the same position as the impact surface of a conventional driver or passenger airbag, while the airbag module is arranged in the roof area above the respective front seat and in particular along the longitudinal direction of the vehicle in the direction of the vehicle front in front of a backrest of the respective front seat.
- the impact surface should lie in front of the head and upper body of the vehicle occupant on the assigned vehicle seat.
- the protective effect can be achieved by the gas bag, for example, regardless of whether there is a steering wheel with a steering wheel gas bag in front of the front seat.
- the instrument panel can also be designed independently of considerations regarding the arrangement of a gas bag module, which expands the design options.
- the airbag can have a neck that extends between the airbag module and a body of the airbag.
- the neck has only a small filling volume and has a significantly smaller extent than the body of the airbag both in the longitudinal direction of the vehicle and in the transverse direction of the vehicle.
- the impact surface and a rear side opposite the impact surface are formed on the body of the gas bag.
- the airbag in particular the body of the airbag, can have any suitable shape, in particular a shape that is well suited for early contact with the vehicle occupant.
- the impact surface of the gas bag from two or more cut parts that are connected in sections at the outer edge sections, the shape of the cut parts and in particular the contour of the outer edge sections of the cut parts connected to one another being selected such that when the Gas bag results in a bulging of part of the impact surface in the direction of the vehicle occupant.
- a region of the impact surface can be composed of at least two pre-cut parts lying next to one another along the transverse direction of the vehicle.
- the outer edge sections of the two pre-cut parts are arranged in such a way that the resulting connection is located between the surfaces of the two pre-cut parts when the airbag is inflated along the vehicle transverse direction.
- a bulge is formed which is directed towards the vehicle occupant.
- the aim is to increase the volume of the airbag and a depth along the longitudinal direction of the vehicle in a specific area in order to establish contact with the vehicle occupant as early as possible.
- a targeted bulge can be produced in a desired section of the impact surface by suitably selecting the shape of the cut parts.
- a bulge in the area of the impact surface has proven to be well suited, which is intended to catch a head of the vehicle occupant, ie an upper section of the impact surface when the gas bag is inflated.
- the joining of the outer edge sections can be done in a known manner, for example by sewing, gluing or welding.
- the blanks can be completely separate from one another or connected to one another in a short section before they are connected at their edge sections. If the cut parts are connected to one another, the cut parts are defined in that they have edge sections to be connected to one another, one of the edge sections being assigned to one cut part and the other edge section to the other cut part.
- each of the two cut parts has a laterally protruding area, these two areas defining the bulge in the assembled and filled gas bag.
- the outer edge portions of the blank parts that are joined together are of equal length and shape.
- edge sections of the same length but differently shaped from different cut parts This usually results in a gas bag that cannot be spread out completely flat. Also, the impact surface is usually not spread out flat.
- the rear side of the airbag which is opposite the impact surface in the inflated state, is preferably realized by a single coherent cut piece.
- a further possibility of influencing the shape of the gas bag is to arrange at least one tether inside the gas bag, which acts on the impact surface of the gas bag and which limits expansion of the filled gas bag along the longitudinal direction of the vehicle.
- the tether preferably connects the impact surface and the back of the gas bag to one another. For example, when the airbag is inflated, the tether runs approximately horizontally or diagonally upwards from a point of contact on the impact surface.
- directions such as “up” or “down” always refer to the gas bag in the installed and filled state and thus to a z-direction of the vehicle.
- a preferred attachment point of the tether on the impact surface is just above an area at the upper end of the impact surface, which is provided for catching the head of the vehicle occupant.
- the catch strap can act on the impact surface just above the bulge.
- Several tethers in particular exactly two tethers, can be present.
- the attachment point of the second tether on the impact surface is then preferably located just below the area which is provided for catching the head of the vehicle occupant, in particular just below the bulge.
- a depth of the airbag can be adjusted along the longitudinal direction of the vehicle and the shape of the airbag can be influenced.
- the two tethers are arranged parallel to one another.
- the two tethers are connected to each other inside the gas bag so that together they form a Y-shape, with the stem of the Y extending in particular towards the top of the rear, while the arms of the Y end at the baffle.
- the tether is not normally intended to disengage, lengthen, or split from its attachment points on the impact surface and rear when the vehicle occupant is caught by the airbag. Throughout the restraint situation, the tether should remain intact and connected to the baffle and backing.
- a gas bag pull-back mechanism is preferably present, which is designed in such a way that, after filling, it moves the gas bag away from the vehicle occupant's field of vision, for example from a windshield of the vehicle. This applies in particular when the airbag is assigned to a driver's seat, in order to enable the driver to have a clear view to the front again as quickly as possible.
- the gas bag retraction mechanism should only become active after the vehicle occupant has been safely caught and the gas bag has reached the end of its normal service life.
- the gas bag can have ventilation openings, as is conventionally known, through which the inflation gas escapes from the gas bag during and after the vehicle occupant has been caught.
- the gas bag retraction mechanism is preferably designed in such a way that it pulls the gas bag towards the roof and thus upwards out of the vehicle occupant's field of vision.
- the gas bag retraction mechanism is operated pyrotechnically, with a pyrotechnic propellant charge, which is arranged in the gas bag module, for example, being activated. It would also be conceivable to use a mechanical device that works, for example, via spring force.
- the airbag retraction mechanism can interact with a tether inside or on the outside of the airbag and shorten it, e.g., by gathering or rolling it up, in order to lift a lower end of the airbag upwards.
- gas bag retraction mechanism can, of course, also be used independently of other catch straps running inside the gas bag.
- the gas bag module preferably comprises the folded gas bag and a gas generator, the gas generator being a tube gas generator which is arranged parallel to a vehicle transverse direction, in particular in the area of a sun visor mounted on the roof area.
- the gas bag module can be easily attached to a roof cross brace, while the gas bag can be deployed in a forward and downward direction. The gas bag can thus emerge from the gas bag module away from the vehicle occupant and then position itself directly downwards in front of the vehicle occupant.
- module housing made of sheet steel, but also of any other suitable material.
- a rigid module housing can be advantageous since it protects the attachment of the sun visor when the airbag is deployed.
- the gas generator can be arranged in the longitudinal direction of the vehicle behind the folded gas bag. The airbag then unfolds between the sun visor and the windshield, viewed in the longitudinal direction of the vehicle.
- the overall module height can be limited to around 35 mm.
- the gas bag module In relation to the transverse direction of the vehicle, the gas bag module should be arranged above the respective assigned front seat. A deployment direction parallel to the upper body of the vehicle occupant can be selected for the airbag.
- a lower end of the airbag is preferably below a chest of the vehicle occupant. If a steering wheel is provided, the gas bag should extend beyond the lower end of the steering wheel.
- the vehicle occupant restraint system can be used at every seat in a vehicle, regardless of whether a steering wheel is assigned to the respective vehicle seat or not.
- the airbag can also replace a conventional front airbag, which is installed, for example, in front of the vehicle seat in the steering wheel or the instrument panel.
- gas bag modules of the same construction for all front seats, for example the driver's and front passenger's seat. If, for example, two front seats are arranged next to one another in the vehicle transverse direction in the vehicle, two identical gas bag modules arranged next to one another along the vehicle transverse direction, each with one gas bag, can be arranged in the roof area. It is therefore no longer necessary to provide different airbags for the driver's and front passenger's seat, which reduces costs.
- the vehicle can have a steering wheel, the steering wheel not having its own steering wheel airbag, being in a position that the vehicle occupant cannot operate in specified driving situations and/or having a detection system that detects whether the vehicle occupant is touching the steering wheel. If the steering wheel is placed in front of the driver's seat, the gas bag should of course always be arranged in such a way that it unfolds between the vehicle occupant and the steering wheel.
- the gas bag can assume the sole function of a front gas bag if either the steering wheel does not have its own gas bag, the steering wheel is sunk into the paneling, for example, or based on predetermined parameters, the detection system recognizes it as unfavorable if the steering wheel airbag would be activated.
- the steering wheel is equipped with its own steering wheel airbag, to only inflate the steering wheel airbag when predetermined parameters are detected, e.g. certain positions or arm positions of the vehicle occupant.
- the gas bag can also be filled in addition to a steering wheel gas bag, also optionally depending on predetermined parameters of the detection system.
- the vehicle occupant restraint system is therefore also suitable for partially or fully autonomous vehicles in which driver intervention is not required or is only required in certain driving situations in a manual driving mode.
- This operating element can have its own steering wheel airbag, or can be designed without its own steering wheel airbag if, for example, the installation space required for this is lacking.
- the vehicle occupant restraint system in a method according to the invention such that in a restraint situation a decision is made as to whether the airbag is filled, depending on whether the vehicle occupant touches the steering wheel.
- the driver actively steers the vehicle, i.e. hands on the steering wheel and a touch on the steering wheel is detected, for example by one of the sensors of the detection system detecting a touch on the steering wheel
- only the steering wheel airbag is filled.
- the gas bag of the gas bag module arranged in the roof area is not activated, since in this case the steering wheel gas bag offers the more favorable restraining effect.
- either only the gas bag of the gas bag module located in the roof area can be filled, or it can be filled in addition to the steering wheel gas bag, since in this case a better restraint effect can be achieved with the gas bag unfolding directly in front of the vehicle occupant.
- earlier contact between the gas bag and the vehicle occupant can be achieved in this way, since the impact surface can be positioned closer to the vehicle occupant.
- a steering wheel positioning mechanism configured to move the steering wheel away from the front seat vehicle occupant in a restraint situation.
- a restraint situation for example, the entire steering wheel is pulled back linearly in the direction of the front of the vehicle or is pivoted up or down. In this way, the space for the vehicle occupant's legs can be increased in the restraint situation.
- the steering wheel should not have its own steering wheel airbag.
- the gas bag of the gas bag module arranged in the roof area then acts as the sole front gas bag.
- the steering wheel positioning mechanism is designed in such a way that the steering wheel is moved away from the vehicle occupant in the front seat as soon as a pre-crash situation is detected and thus immediately before the actual restraint situation occurs.
- a pre-crash situation describes in particular an event in which suitable sensor elements and a control unit of the vehicle occupant protection system determine that a restraint situation will occur or is at least likely to occur.
- the sensor elements can be, for example, radar, lidar, infrared and/or camera elements for monitoring the vehicle and/or the vehicle surroundings and/or the driving situation of the vehicle.
- the gas bag of the gas bag module arranged in the roof area or other systems to protect the vehicle occupant can of course also be activated earlier, for example to achieve a more optimal positioning of the gas bag or to place the vehicle occupant in a restraint system better position to move.
- the steering wheel positioning mechanism can be pyrotechnically or mechanically or electromechanically driven.
- the airbag of the vehicle occupant protection system described here is not limited to use for front seats, but can be implemented for any vehicle seat, even if no separate steering wheel or other control element is provided for it.
- FIGS. 1 to 4 show a schematic side view of a vehicle occupant restraint system according to the invention with a completely filled gas bag;
- FIGS. 5 to 7 show the sequence of a restraint situation using the vehicle occupant restraint system from FIG. 1;
- FIGS. 8 and 9 the catching of a vehicle occupant with a gas bag of the vehicle occupant restraint system from FIG. 1;
- FIGS. 10 to 12 show the vehicle mass restraint system from FIG. 1 with a first variant of the airbag;
- FIGS. 13 to 15 show the vehicle occupant restraint system from FIG. 1 with a second variant of the airbag
- FIGS. 16 to 25 different variants of the gas bag of the vehicle occupant restraint system from FIG. 1;
- FIGS. 26 and 27 show an airbag retraction mechanism of the vehicle occupant restraint system according to the invention
- Figures 28 and 29 show a steering wheel positioning mechanism of the vehicle occupant restraint system of the present invention
- FIGS. 30 to 32 schematically show the structure of a gas bag module of the vehicle occupant restraint system according to the invention.
- FIGS. 33 to 35 schematically show the arrangement of a gas generator in the gas bag of the vehicle occupant restraint system according to the invention.
- FIGS 1 to 4 show a vehicle occupant restraint system 10, which is designed for a vehicle occupant 12 on a front seat 14 here.
- a gas bag module 18 is arranged in a roof area 16 of the vehicle and is assigned to the respective front seat 14 .
- the gas bag module 18 is therefore located above the front seat 14 in relation to both a vehicle longitudinal direction L and a vehicle transverse direction Q, in this case approximately above the thighs of the vehicle occupant 12 (indicated e.g. in FIG. 1).
- the gas bag module 18 contains a gas bag 20, which is shown in FIGS. 1, 3 and 4 in a completely inflated state.
- the airbag 20 comprises a body 22, which makes up a large part of the inflated volume of the airbag 20 and on which an impact surface 24 facing the vehicle occupants 12 is formed.
- the body 22 of the gas bag 20 has a rear side 26 on the side opposite the impact surface 24 .
- the course of the impact surface 24 and the back 26 defines a longitudinal axis I of the airbag 20 which runs from a lower end 28 to an upper end 30 .
- the lower end 28 is also through the point characterized at which the baffle 24 and the back 26 are connected to each other.
- the body 22 of the gas bag 20 transitions into a narrow neck 32, which connects the body 22 to a gas generator 34 of the gas bag module 18 (indicated in FIG. 1, see also FIGS. 30 to 35).
- the neck 32 has a significantly smaller filling volume than the body 22 and is narrower than the body 22 both in the vehicle longitudinal direction L and in the vehicle transverse direction Q.
- the neck 32 is used to connect the body 22 to the gas bag module 18 and to position the gas bag 20 at the desired location in the vehicle interior.
- a detection system 36 in the vehicle which includes a control unit (not shown) and various sensors that can detect, for example, a position of front seat 14, a position of vehicle occupant 12 and/or a current driving situation of the vehicle.
- the vehicle has a steering wheel 38 associated with the front seat 14 so that it can be grasped by the vehicle occupant 12 to manually steer the vehicle.
- a separate steering wheel airbag 40 is arranged in the steering wheel 38, which can be filled in a restraint situation in order to catch the vehicle occupant 12.
- the detection system 36 here also includes a sensor that detects whether the vehicle occupant 12 is touching the steering wheel 38 or not, which indicates whether the hands of the vehicle occupant 12 are on the steering wheel 38 or not.
- this detection is used to decide in a restraint situation whether the gas bag 20 should be filled or not.
- FIG. 4 shows a driving situation in which the steering wheel 38 is lowered behind a panel 42 in a fully autonomous or partially autonomous driving situation, so that the steering wheel airbag 40 is therefore also not available in a restraint situation. If a restraint situation occurs in this driving situation, only the gas bag 20 is of course filled.
- FIG. 4 shows a front seat 14 which is not assigned a steering wheel, for example a front passenger seat, the covering 42 then being formed by an instrument panel.
- all of the front seats 14 of the vehicle are assigned identical gas bag modules 18 in the roof area 16 . It is of course also possible Provide gas bag modules 18 for other vehicle seats, for example in the rear area or in coaches.
- Figures 5 to 7 show the course of a restraint situation. It can be seen that the gas bag 20 unfolds from the roof area 16 essentially vertically downwards (z-direction) between the vehicle occupant 12 and the steering wheel 38 , with the impact surface 24 being placed in front of a head 44 and an upper body 46 of the vehicle occupant 12 becomes. As FIG. 6 shows, the gas bag 20 reaches this position before the vehicle occupant 12 dives into the gas bag 20 . The gas bag 20 catches the head 44 and upper body 46 of the vehicle occupant 12 with the impact surface 24, as can be seen in FIG.
- FIGS. 8 and 9 once again show how the vehicle occupant 12 is caught in a restraint situation.
- catch straps 48 , 50 which each engage with one end with a contact point 52 on the impact surface 24 .
- the tethers 48, 50 run approximately parallel to one another and approximately horizontally and are each connected to the rear side 26 with an attachment point 53 opposite the attachment point 52.
- the tethers 48, 50 limit an expansion of the filled gas bag 20 along the longitudinal direction L of the vehicle.
- All of the tethers 48, 50 are designed here to remain firmly connected to the baffle 24 and back 26 throughout the restraint situation and also remain inherently intact and of the same length.
- the attachment points 52 on the impact surface 24 are arranged here above and below an area of the impact surface 24 on which the head 44 of the vehicle occupant 12 strikes.
- Figures 10 to 25 show the cutting of the lateral surface of the gas bag 20, precisely of the body 22, in detail for different shapes of the filled gas bag 20. In general, a wide variety of shapes for the filled body 22 can be achieved via the shape of the individual blanks.
- the principle of shaping is based on the fact that outer edge sections of the same length from different cut parts are connected to one another, which together result in a curved surface with a larger surface area than the resulting peripheral edge. Since the outer edge sections to be connected each have the same length, they can be connected without gathering or darts.
- the length and contour of the outer edge sections determine the shape. On the other hand, it does not matter whether the individual cut parts are completely separate pieces of fabric or whether they are connected to one another in one piece in places that would be connected by a straight connection in the case of separate cut parts.
- the rear side 26 of the body 22 of the gas bag 20 is in each case formed from a single cut part 54, while the impact surface 24 consists of one or more cut parts.
- Figures 10 to 12 show a first example.
- the blank 54 is connected to a subsequent blank 56 of the baffle 54 at the lower end 28 of the body 22 .
- the two blank portions 54, 56 may be integral with one another or may be initially separate from one another.
- the impact surface 24 is composed of the blank part 56 and a further blank part 60 which adjoins the blank part 56 on the opposite side of the blank part 54 .
- the blank parts 54, 56, 60 are lined up along what will later be the longitudinal axis I of the body 22.
- the outer edge sections 58, 62 to be connected to one another each have the same length, but can have different contours.
- Each of the individual blanks 54, 56, 60 is mirror-symmetrical with respect to the longitudinal axis I here.
- Figures 13 to 15 show a shape of the body 22 of the gas bag 20, in which the impact surface 24 along the vehicle longitudinal direction L (in the installed and inflated state) has a bulge 66, which extends towards the vehicle occupant
- the bulge 66 is located in the area of the impact surface 24 which is provided for catching the head 44 of the vehicle occupant 12 and is in an upper area of the impact surface 24 (see, for example, FIG. 15).
- the bulge 66 extends beyond the remainder of the baffle 24 by an amount Ax.
- the catch straps 48 , 50 which are also provided in this example engage with their attachment points 52 respectively above and below the bulge 66 on the impact surface 24 .
- the bulge 66 is produced in that the impact surface 24 is composed of a total of three blank parts 56, 68, 70, as FIG. 14 shows.
- the blank part 56 is approximately semicircular, but here it is a separate part and is connected to the blank part 54 by a further connection.
- the two blank parts 68, 70 are arranged mirror-symmetrically and side by side (relative to the transverse direction Q of the vehicle and the longitudinal axis I). They each have a laterally protruding area 72, with the two areas 72 facing each other and being connected to one another at their outer edge sections 74.
- the connected Outer edge sections 74 In the filled gas bag 20 are the connected Outer edge sections 74 in relation to the vehicle transverse direction Q in the middle of the impact surface 24.
- the outer edge sections 58 of the blank parts 56, 68, 70 pointing towards the blank part 56 are connected to the blank part 54.
- FIGS. 16 and 17 show a second blank shape with which a bulge 66 can be achieved.
- the only difference to the variant shown in Figures 13 to 15 is the shape of the cut parts 68, 70.
- FIGS. 18 and 19 show a variant which is similar in shape to the gas bag 20 of FIGS. 10 to 13.
- two tethers 48, 50 are arranged inside the gas bag 20, which are brought together approximately at the level of the longitudinal axis I and lead from there with a single tether section to a single attachment point 53 on the back 26.
- the lower tether 50 runs obliquely upwards in the direction of the upper end 30 of the body 22 of the gas bag 20 and forms a style of the Y, so to speak.
- Its attachment point 53 is here at the upper end of the rear side 26, near the attachment of the neck 32.
- FIGS. 20 to 25 show variants of the gas bag 20 in which the impact surface 24 also consists of only a single cut part 56.
- the three-dimensional shape is achieved by the differently shaped contours of the outer edge sections 58 of the blank parts 54, 56.
- An optional airbag retraction mechanism 76 is shown in Figures 26 and 27, which is designed to retract the lower end 28 of the airbag 20 upwards in the direction of the roof area 16 and out of the field of vision of the vehicle occupant 12 after the airbag 20 fulfilled its protective function.
- the inflation gas escapes from the gas bag 20 through vent openings (not shown), so that the gas bag 20 becomes compressible again.
- a retraction tether 78 attached to the lower end 28 of the gas bag 20 is connected to the gas bag retraction mechanism 76 located in the roof area 16, so that when the length of the retraction tether 78 inside the gas bag is shortened, the lower end 28 of the gas bag 20 moves upwards towards the roof area 16 is raised. In this way, the gas bag 20 is pulled out of the field of vision of the vehicle occupant 12 .
- the retraction tether 78 can run along the inside of the gas bag 20 or on the outside of the gas bag 20, e.g. on the rear side 26.
- the gas bag retraction mechanism 76 can be integrated into the gas bag module 18, for example.
- a suitable pyrotechnic or mechanical actuator (not shown) is used to retract, e.g., gather or roll up, the retraction tether 78 .
- the air bag retraction mechanism 76 is actuated once the actual restraint situation is complete to allow the vehicle occupant 12 to regain visibility through the vehicle windshield 80 as soon as possible.
- FIG. 28 and 29 Shown in Figures 28 and 29 is an optional steering wheel positioning mechanism 82 which is configured to move the steering wheel 38 away from the vehicle occupant 12 prior to or during a restraint situation. This increases the space for the vehicle occupants 12, in particular for their legs.
- FIG. 28 shows a solution in which the steering wheel 38 is linearly displaced along the direction of a steering column toward the front of the vehicle.
- FIG. 29 shows a solution in which the steering wheel 38 is swiveled up or down through an angle of approximately 30° to 90°.
- the drive can take place, for example, pyrotechnically or mechanically.
- a module housing 84 is firmly fixed to a roof cross brace 88 via fastening straps 86 and corresponding screws.
- the gas generator 34 and the gas bag 20 combined to form a package 89 are accommodated in the module housing 84 , which consists for example of sheet steel or another suitable rigid material.
- the gas generator 34 projects into the gas bag 34 with a gas outflow area 90 .
- the gas generator 34 and the gas bag 20 are also firmly and permanently fixed to the roof area 16 via the module housing 84 .
- a covering for example a headliner 92, covers the gas bag module 18 from the vehicle interior.
- the gas bag module 18 is arranged in the area of a sun visor 94 so that the gas bag 20 unfolds between the windshield 80 and the sun visor 94 .
- the gas generator 34 is arranged parallel to the transverse direction Q of the vehicle.
- the end of the neck 32 that does not lead into the body 22 of the gas bag 20 ends in an opening 96 adapted to the diameter of the gas generator 34, into which the gas outflow area 90 of the gas generator 34 is inserted (see FIG. 34).
- a rim of the opening 96 is turned outwards here, resulting in a defined insertion opening.
- the gas generator 34 After the gas generator 34 has been inserted, it is fixed to the gas bag 20 by means of one or more suitable clamps 98 which are pushed over the gas generator 34 and the edge of the opening 96 .
- the gas outflow area 90 is arranged centrally in the neck 32 so that when the gas generator 34 is activated, the inflation gas flows directly through the neck 32 into the body 22 of the gas bag 20 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112021006366.9T DE112021006366A5 (de) | 2020-12-10 | 2021-12-08 | Fahrzeuginsassenrückhaltesystem |
US18/256,464 US20240025364A1 (en) | 2020-12-10 | 2021-12-08 | Vehicle occupant restraint system |
CN202180080710.8A CN116568587A (zh) | 2020-12-10 | 2021-12-08 | 车辆乘员约束*** |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020132998.9 | 2020-12-10 | ||
DE102020132998.9A DE102020132998A1 (de) | 2020-12-10 | 2020-12-10 | Fahrzeuginsassenrückhaltesystem |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022122801A1 true WO2022122801A1 (de) | 2022-06-16 |
Family
ID=79170952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/084736 WO2022122801A1 (de) | 2020-12-10 | 2021-12-08 | Fahrzeuginsassenrückhaltesystem |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240025364A1 (de) |
CN (1) | CN116568587A (de) |
DE (2) | DE102020132998A1 (de) |
WO (1) | WO2022122801A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230060876A1 (en) * | 2021-09-02 | 2023-03-02 | ZF Passive Safety Systems US Inc. | Fill tube adaptor for inflator |
WO2024137190A1 (en) * | 2022-12-22 | 2024-06-27 | Caleen Design Labs Llc | Airbags for a steering wheel adjustable in an out-of-use position |
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2020
- 2020-12-10 DE DE102020132998.9A patent/DE102020132998A1/de not_active Withdrawn
-
2021
- 2021-12-08 DE DE112021006366.9T patent/DE112021006366A5/de active Pending
- 2021-12-08 CN CN202180080710.8A patent/CN116568587A/zh active Pending
- 2021-12-08 WO PCT/EP2021/084736 patent/WO2022122801A1/de active Application Filing
- 2021-12-08 US US18/256,464 patent/US20240025364A1/en active Pending
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DE102015004973A1 (de) * | 2015-04-20 | 2016-10-20 | Trw Automotive Gmbh | Front-Kopf/Rumpf-Gassack |
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WO2024137190A1 (en) * | 2022-12-22 | 2024-06-27 | Caleen Design Labs Llc | Airbags for a steering wheel adjustable in an out-of-use position |
Also Published As
Publication number | Publication date |
---|---|
DE112021006366A5 (de) | 2023-10-05 |
CN116568587A (zh) | 2023-08-08 |
DE102020132998A1 (de) | 2022-06-15 |
US20240025364A1 (en) | 2024-01-25 |
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