EP4021765A1 - Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur - Google Patents

Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur

Info

Publication number
EP4021765A1
EP4021765A1 EP20753691.3A EP20753691A EP4021765A1 EP 4021765 A1 EP4021765 A1 EP 4021765A1 EP 20753691 A EP20753691 A EP 20753691A EP 4021765 A1 EP4021765 A1 EP 4021765A1
Authority
EP
European Patent Office
Prior art keywords
diffuser
gas generator
outflow opening
gas
base body
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Withdrawn
Application number
EP20753691.3A
Other languages
German (de)
English (en)
Inventor
Christian Jung
Thomas Kapfelsperger
Bernd Weber
Michael SCHMÖKEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Airbag Germany GmbH
Original Assignee
ZF Airbag Germany GmbH
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 ZF Airbag Germany GmbH filed Critical ZF Airbag Germany GmbH
Publication of EP4021765A1 publication Critical patent/EP4021765A1/fr
Withdrawn legal-status Critical Current

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
    • B60R21/26—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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • 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
    • B60R21/26—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
    • 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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • B60R21/262—Elongated tubular diffusers, e.g. curtain-type
    • 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
    • B60R2021/26076—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 casing
    • 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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • 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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • B60R2021/2617—Curtain bag nozzles

Definitions

  • the invention relates to a diffuser for a gas generator according to the preamble of claim 1. Furthermore, the invention relates to a gas generator with such a diffuser. The invention also relates to a gas bag module which has such a gas generator. The invention also shows a method for producing the diffuser.
  • a diffuser with the features of the preamble of claim 1 is known from EP 1 544 060 A1.
  • the known diffuser comprises an essentially tubular base body with a longitudinal axis, an impact cap axially connected to the base body at a first end of the diffuser and a connection device formed on a second end of the diffuser opposite the first end.
  • the known diffuser has radial openings in its tubular base body, through which a gas can flow out of the interior of the diffuser exclusively essentially in the radial direction, that is to say essentially perpendicular to the longitudinal axis of the tubular base body of the diffuser.
  • a diffuser has the function of introducing gas generated and / or stored in a gas generator into a gas bag connected to or subsequently positioned on the diffuser.
  • the known diffuser has the disadvantage that the gas bag, which is usually located relatively close to the radial openings of the diffuser, is relatively heavily loaded by the gas flowing out of the diffuser exclusively in the radial direction, in particular with
  • a further object of the invention is to specify a gas generator with such a diffuser.
  • the invention also has the task of specifying a gas bag module and a vehicle safety system with a gas generator and a method for producing a diffuser for the gas generator.
  • this object is achieved with regard to the diffuser by the subject matter of claim 1, with regard to the gas generator by the The subject matter of claim 12, with regard to the gas bag module by the subject matter of claim 15, with regard to the vehicle safety system by the subject matter of claim 16 and with regard to the manufacturing method by the subject matter of claim 17.
  • the diffuser according to the invention for a gas generator accordingly has an essentially tubular base body with a longitudinal axis, a baffle cap axially connected to the base body at a first end of the diffuser and a connection device formed on a second end of the diffuser opposite the first end and is characterized in that in At least one outflow opening is formed on an outer wall of the tubular base body such that gas can flow out of the diffuser from the interior of the diffuser essentially parallel to the longitudinal axis in the direction of the first and second ends, the baffle cap being free of an outflow opening.
  • a tubular base body is to be understood here as meaning that the base body has an essentially cylindrical outer contour.
  • the term that "the impact cap is axially connected to the base body” should be understood to mean that the impact cap adjoins the base body in the axial direction, that is, along or parallel to the longitudinal axis of the base body, either as an additional component or in one piece with the base body.
  • Essentially parallel to the longitudinal axis should be understood to mean that a mean flow direction of the gas runs parallel to or at an acute angle of less than 45 ° to the longitudinal axis of the base body of the diffuser.
  • the advantage of the invention is, on the one hand, that the gas cannot flow from the area of the impact cap to an airbag or module housing located in the vicinity of the impact cap.
  • the impact cap of the diffuser represents an axial closure of the diffuser or a gas generator with such a diffuser, further components positioned close to the impact cap, such as the gas bag or module housing, are not impaired by thermal and / or mechanical loads.
  • the gas is advantageously not directed directly against an airbag, but along a folded airbag. By deflecting the main flow of the gas inside the diffuser through the impact cap, the main flow is also throttled.
  • the diffuser according to the invention can thus, for example, dispense with the use of a calzone already described above.
  • the diffuser according to the invention is inexpensive because it can be easily realized from. A circumferential clamp outside the diffuser that diverts the flow would result in higher manufacturing costs.
  • the at least one outflow opening is formed as a first outflow opening and as a second outflow opening and in particular the impact cap is dome-shaped, preferably as a spherical segment or spherical cap.
  • the outflow openings are expediently formed in such a way that the surface of the outflow opening has a surface normal which runs parallel to the longitudinal axis.
  • the first outflow opening and the second outflow opening are formed by a single tab, which is formed by two parallel incisions in the outer wall of the tubular base body running perpendicular to the longitudinal axis and deforming the area in between in a radially outward direction.
  • a tab can have a flat or curved surface.
  • An incision in the sense of the invention means that a cut or a corresponding material removal is made along or through the entire thickness of the outer wall of the base body, for example by cutting, sawing, milling or laser ablation, around a corresponding incision which extends radially along a certain area of the base body extends to generate.
  • the two incisions do not have to run geometrically exactly perpendicular to the longitudinal axis or parallel to one another, but can also run divergent to one another. However, when the area lying between the incisions is deformed, a correspondingly more complex tool design or tool guidance may then be necessary in order to produce the tab by deforming.
  • the tab is designed like a gill, the tab comprising two semi-spherical elevations, in particular the connection device formed at the second end of the diffuser has a taper.
  • the elevations are in particular arranged such that the first outflow opening directed towards the first end and the second outflow opening directed towards the second end are formed.
  • the elevation at the respective outflow opening can have the greatest (radial) distance from the longitudinal axis.
  • a boundary surface of the two elevations has the smallest radial distance from the longitudinal axis, which is greater than or equal to the radius of the tubular base body.
  • the tapering at the second end of the diffuser can be produced in the form of a circumferential groove or groove, for example by rolling or crimping, and thus act as a quasi-preformed connection device for a gas generator, which has a geometrically complementary recess at a provided connection point with the diffuser, so that both recesses, which the diffuser and the gas generator, can engage in one another in a form-fitting and / or force-fitting manner.
  • a corresponding recess is only made on the diffuser after a connection or after it has been positioned on the gas generator.
  • the diffuser has an initially cylindrical outer contour at its second end before it is mounted on the gas generator and is brought into the connection position to the gas generator, which has a circumferential recess in its outer housing. Then the diffuser with its connection point to the gas generator is molded or molded in, for example by rolling or crimping, so that a corresponding complementary recess is only formed on the diffuser by this assembly step.
  • a curvature of the elevations decreases towards the first and second outflow opening, so that a radial portion of a flow of the gas from the interior of the diffuser through the first and second outflow opening can be reduced and the flow can be formed essentially exclusively axially. This means that the elevation in an area spaced apart from the first or second outflow opening has the largest (radial)
  • the curvature in the axial direction causes a kind of gas deflection section which deflects the flow of the gas radially inwards to a small extent, at least in such a way that any radially outwardly directed flow components at the outflow openings are directed, so to speak, exclusively on an axial line at least in such a way that overall an essentially exclusively axial direction results for the flow of the gas.
  • the first outflow opening is formed by a first flap and the second outflow opening is formed by a second flap, the first and the second flap being formed by two parallel incisions running perpendicular to the longitudinal axis and deformation of a part of the respective incisions from the incisions to a first or
  • the second end facing region is formed in a radially inward direction.
  • This embodiment is an inverse embodiment to the embodiment mentioned above, in that the base body of the diffuser is deformed inwards and not outwards.
  • the first and second tabs are preferably designed in the manner of gills, the first and second tabs each comprising a semi-spherical recess.
  • the tab or the first and second tabs are expediently designed symmetrically with respect to the longitudinal and / or a transverse axis.
  • the first outflow opening which is directed towards the first end, has a larger opening area than the second outflow opening, which is directed towards the second end.
  • the opening area of the first and the second opening is designed such that a mass flow of the gas through the first opening is the same as that through the second opening.
  • the diffuser can be used in a thrust-neutral manner due to the opposing, equally large mass flows.
  • the base body has an inwardly directed curvature of the bottom on a side radially opposite the first and second outflow opening.
  • the curvature of the bottom optimizes the orientation of the main flow within the diffuser in relation to the outflow openings.
  • first and second outflow openings are arranged, in particular distributed, in a circumferential direction.
  • the arrangement of further first and second outflow openings is the The gas flow in the gas bag is better distributed or it is possible to fill several gas bags separately from one another.
  • a secondary aspect of the invention relates to a gas generator, in particular a tubular gas generator, for a gas bag module with a tubular housing and a diffuser according to the invention, which is arranged at a first end of the gas generator.
  • a diameter of the gas generator and the diffuser is essentially the same size.
  • the housing of the gas generator preferably has a taper at its first end into which a taper of the diffuser can engage in a complementary manner or can be formed there.
  • the diffuser can be fixed to the housing of the gas generator with a corresponding crimp or circumferential rolling, whereby the taper on the diffuser can be introduced before the fixing assembly or only afterwards or with the corresponding assembly step.
  • the gas generator can be a pyrotechnic gas generator or a hybrid gas generator which comprises a pressurized gas container filled with pressurized gas.
  • Another secondary aspect of the invention relates to a gas bag module with a gas generator, a gas bag that can be inflated by the gas generator and a fastening device for attaching the gas bag module to a vehicle.
  • the gas generator can be designed as described above.
  • a vehicle safety system in particular for protecting a person, for example a vehicle occupant or passers-by, is disclosed and claimed.
  • the vehicle safety system has a gas generator, a gas bag that can be inflated by this, as part of a gas bag module, and an electronic control unit, by means of which the gas generator can be activated in the event of a triggering situation.
  • the gas generator is designed as described above.
  • Another secondary aspect of the invention relates to a method for producing a diffuser with the following steps: a) Providing a tubular base body with an outer wall and with an impact cap axially connected to the base body, which is a first
  • the end of the diffuser forms b) making two parallel incisions running in the radial direction in the outer wall of the base body, with a first length, the incisions having a depth of the wall of the base body, c) plastic deformation, in particular bulging of a single tab or a first and a second tab in an area or areas adjoining the incisions.
  • the method according to the invention is simple and inexpensive.
  • the plastic deformation is carried out either from the inside of the diffuser radially outward by means of a mandrel with one or two hemispherical bulges or from the outside of the diffuser radially inward by means of a pressing tool with one or two hemispherical bulges ( en) carried out.
  • FIG. 1 shows a tubular gas generator with a diffuser according to the invention according to a first embodiment
  • FIG. 2 shows a longitudinal section of the tube generator according to FIG. 1;
  • FIG. 3 shows an enlarged detail of FIG. 2;
  • FIG. 4 shows a diffuser according to the invention according to the first embodiment
  • FIG. 5 shows a longitudinal section of the diffuser according to FIG. 4; 6 shows a longitudinal section of a diffuser according to the invention according to a second embodiment;
  • FIG. 7 shows a diffuser according to the invention according to a third embodiment
  • FIG. 8 shows a longitudinal section of the diffuser according to FIG. 7; 9 shows a longitudinal section of a diffuser according to the invention according to a fourth embodiment;
  • FIG. 10 shows a longitudinal section of a diffuser according to the invention according to a fifth embodiment
  • FIG. 11 shows a diffuser according to the invention according to a sixth embodiment
  • FIG. 12 shows a longitudinal section of the diffuser according to FIG. 11.
  • FIG. 1 to 3 show a gas generator 50 with a diffuser 10 according to the invention according to a first embodiment. 4 and 5 show only the diffuser 10 according to the first embodiment.
  • the gas generator 50 is designed as a tubular gas generator.
  • the gas generator has a tubular housing 51 with a
  • the diffuser 10 has a tubular base body 11 with a longitudinal axis 16 which extends as an extension of the longitudinal axis 56 of the housing 51 of the gas generator 50.
  • a baffle cap 12 is then axially connected to the tubular base body 11 at a first end 13 of the diffuser 10.
  • the tubular base body 11 of the diffuser 10 has an essentially cylindrical outer contour.
  • the impact cap 12 axially connected to the base body 11 is to be understood as meaning that the impact cap 12 adjoins the base body 11 in the axial direction, i.e. along or parallel to the longitudinal axis 16 of the base body 11, either as a separate component or in one piece with the base body.
  • the impact cap 12 can, for example, on the ok
  • Base body 11 screwed on, crimped on, rolled up or cohesively connected, for example by laser or friction welding.
  • the housing 51 of the gas generator 50 and the tubular base body 11 of the diffuser 10 expediently have a similar, in particular the same, diameter.
  • the diffuser 10 is connected to the housing 51, for example by means of crimping or radially circumferential rolling.
  • a tab 20 with two elevations 23 is visible in a region of the tubular base body 11 of the diffuser 10.
  • a first outflow opening 21 and a second outflow opening 22 are arranged between the elevations 23 and the tubular base body 11, through each of which gas can flow out or flow out from the interior of the diffuser 10 into an outer region of the diffuser 10.
  • the surface of the first outflow opening 21 and the second outflow opening 22 each have a surface normal parallel to the longitudinal axis 16 of the diffuser 10.
  • a floor arch 24 is arranged there in the wall of the diffuser 10.
  • the mode of operation of the gas generator 50 is as follows: When the igniter 52 is ignited or activated, a gas is generated and / or released inside the gas generator, so that a corresponding gas flow is generated or is formed, which runs along the longitudinal axis 56 of the tubular housing 51 of the gas generator 50 is moved or directed there, and the membrane 55 and subsequently the membrane 54 bursts or opens it. The gas flow or the entire amount of gas which is comprised by the gas flow then flows into the diffuser 10 or is passed on there.
  • part of the gas or the gas flow is deflected by means of the floor vault 24 and the baffle cap 12 and thereby directed to the second outflow opening 22, whereby part of the gas flow or part of the amount of gas makes the outflow opening 22 largely parallel to the longitudinal axis 56 of the gas generator or largely parallel to the longitudinal axis 16 of the base body 11 of the diffuser 10.
  • another part of the gas flow is passed directly through the elevation 23 to the first outflow opening 21 and leaves the diffuser 10 largely parallel to the longitudinal axis 16.
  • the gas flows that the diffuser 10 through the first outflow opening 21 and the leave second outflow opening 22, run essentially in opposite directions, so that for the gas generator 50 with regard to its gas outflow in its activation case, an intended thrust neutrality is essentially maintained.
  • the diffuser 10 shown in FIGS. 4 and 5 is made from a tubular base body 11 with an impact cap 12 connected in one piece to the base body 11, in which the base body 11 is initially provided with two parallel incisions perpendicular to the longitudinal axis 16.
  • the base body 11 is cut continuously from the outside over its entire wall thickness along a corresponding radially circumferentially extending region.
  • Such an incision which produces the corresponding incisions, can be carried out by known material removal methods, such as, for example, sawing, cutting, milling or laser treatment.
  • a molding tool in the form of a dome provided with two semi-spherical bulges, a tab 22 with two elevations 23 is formed in the base body 11 by pressing or moving the mandrel outwards accordingly.
  • a complementarily shaped counter-holding tool can be positioned or guided from the outside.
  • the material of the diffuser is correspondingly stretched, stretched or also cold-hardened in or on the adjacent area of the shaping.
  • the diffuser 10 can be provided with a circumferential tapering 15 in the area of its second end 14 and / or with a bottom arch 24 in the area of its first end 13, which is arranged on a side opposite the tab 20.
  • the diffuser 10 with its circumferential taper 15 can thus be placed on the gas generator 50 for further attachment to the latter in such a way that its taper 15 into a correspondingly geometrically complementary tapering or depression of the gas generator 50 in the attachment area with the diffuser 10 engages and / or is fixed there.
  • the circumferential tapering 15 of the diffuser 10 can only be introduced thereon when the diffuser 10 is mounted or fastened to the gas generator 50.
  • the diffuser 10 has a substantially cylindrically shaped second end 14, without a taper, before its assembly, is then positioned on the gas generator 50, which has a corresponding complementary recess, in a corresponding axial fastening position. Only then is the diffuser 10 at its second end 14 radially inward to the Complementary recess of the gas generator 50 is integrally formed, for example by means of a radially circumferential rolling, so that the recess 15 is formed on the diffuser 10.
  • FIG. 6 shows a longitudinal section of a diffuser 10 according to a second embodiment.
  • the elevations 23 are provided with a first and a second flow guide area 33, 34.
  • the flow guiding area 33 is formed sloping towards the first end 13, while the flow guiding area 34 is formed sloping towards the second end 14.
  • an outwardly sloping curvature is formed, which prevents a flow component of the gas flowing out of the diffuser from developing with a radial component when flowing out of the first outflow opening 21 and the second outflow opening 22.
  • a gas flowing out of the diffuser which could possibly have a small radially directed outflow component, is quasi "forced" to continue flowing in an outflow direction essentially exclusively parallel to the longitudinal axis 16 of the diffuser by the flow guide regions 33, 34.
  • the diffuser 10 has a tubular base body 11 with a longitudinal axis 16.
  • the diffuser 10 has a tab 20 in a section of the base body 11.
  • the tab 20 is at a greater radial distance from the longitudinal axis 16 than the rest of the base body 11, so that a first outflow opening 21 and a second outflow opening 22 are formed.
  • a wall of the tab 20 runs parallel to the longitudinal axis 16.
  • the surface of the first outflow opening 21 and the second outflow opening 22 each have a surface normal parallel to the longitudinal axis 16.
  • the diffuser 10 can also have a bottom curvature 24 according to the third embodiment.
  • the diffuser 10 can optionally have a taper 15 for attachment to the gas generator 50.
  • the fourth embodiment of a diffuser 10 shown in FIG. 9 is a modification of the third embodiment.
  • the tab 20 has flow guide areas 33 and 34.
  • the flow guide areas 33 and 34 also serve here to create a radial To limit flow components or to generate an essentially exclusively parallel outflow direction of a gas from the interior of the diffuser 10.
  • the fourth embodiment 10 shows a diffuser 10 according to a fifth embodiment.
  • the fifth embodiment is a further modification of the third embodiment shown in FIGS.
  • the tab 20 has an inclination or an angle with respect to the longitudinal axis 16.
  • the inclination of the tab 20 is selected such that the second outflow opening 22 has a smaller opening area than the first outflow opening 21. Due to the smaller opening area of the second outflow opening 22, a mass flow of a gas exiting through the second outflow opening 22 can be reduced.
  • the mass flows can be set as desired, in particular the same size.
  • the diffuser 10 has a tubular base body 11 with an impact cap 12 at a first end 13 of the diffuser 10.
  • a first tab 20a and a second tab 20b are arranged or formed in the base body 11.
  • the first tab 20a and the second tab 20b are at a smaller distance from the longitudinal axis 16 than the rest of the base body 11, i.e. they extend inward.
  • Each of the first and second tabs 20a, b has a semi-spherical recess 25.
  • a region of the tubular base body 11 is arranged between the ends of the first and second tabs 20a, b.
  • a first outflow opening 21 is arranged between one end of the first tab 20a and the area of the tubular base body 11, and a second outflow opening 22 is disposed between one end of the second tab 20b and the area of the tubular base body 11.
  • the outflow openings 21 and 22 have a surface normal parallel to the longitudinal axis 16.
  • a diffuser 10 according to the sixth embodiment is produced by providing a tubular base body 11 with an impact cap 12. Two parallel incisions are made in the base body 11 perpendicular to the longitudinal axis 16 of the base body 11. Areas outside of the parallel incisions made are radially inwards with a molding tool pressed in, so that a first tab 20a and a second tab 20b is generated. The area between the two tabs 20a, b is not deformed, so that here an area of the base body 11, so to speak, remains or remains as a remainder, which in itself forms the shape of an arc or a section of an arc.
  • the outer wall of the base body 11 viewed in isolation, or viewed without the aforementioned formed arch, has only a single opening to the outside or a single outflow opening which has a corresponding slot-like shape along a region of the circumference of the base body 11 .
  • the tubular base body 11 is considered with regard to the possibility of different gas flow paths or gas flow directions and if the aforementioned formed bends are also considered, the single outflow opening can be viewed as a formation of the aforementioned first and second outflow openings 21, 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un diffuseur (10) pour un générateur de gaz (50), comportant un corps de base (11) sensiblement tubulaire ayant un axe longitudinal, un capuchon de déflexion (12) jouxtant axialement le corps de base (11), à une première extrémité du diffuseur (10) et un dispositif de raccordement réalisé à une seconde extrémité (14) du diffuseur (10), située à l'opposé de la première extrémité (13), au moins une ouverture d'écoulement (21, 22) étant ménagée dans une paroi extérieure du corps base (11) tubulaire, de sorte que le gaz peut s'écouler hors de l'intérieur du diffuseur (10) sensiblement parallèlement à l'axe longitudinal (16) en direction de la première (13) et de la seconde extrémité (14) hors du diffuseur (10), le capuchon de déflexion (12) étant exempt d'ouverture d'écoulement. L'invention concerne en outre un générateur de gaz doté d'un tel diffuseur, un module airbag qui présente un tel générateur de gaz ainsi qu'un procédé de fabrication du diffuseur.
EP20753691.3A 2019-08-27 2020-07-29 Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur Withdrawn EP4021765A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019122987.1A DE102019122987A1 (de) 2019-08-27 2019-08-27 Diffusor für einen Gasgenerator, Gasgenerator mit einem solchen Diffusor und Herstellungsverfahren für einen solchen Diffusor
PCT/EP2020/071395 WO2021037469A1 (fr) 2019-08-27 2020-07-29 Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur

Publications (1)

Publication Number Publication Date
EP4021765A1 true EP4021765A1 (fr) 2022-07-06

Family

ID=71995964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20753691.3A Withdrawn EP4021765A1 (fr) 2019-08-27 2020-07-29 Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur

Country Status (6)

Country Link
US (1) US11951930B2 (fr)
EP (1) EP4021765A1 (fr)
JP (1) JP7598364B2 (fr)
CN (1) CN114269609A (fr)
DE (1) DE102019122987A1 (fr)
WO (1) WO2021037469A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122990A1 (de) * 2019-08-27 2021-03-04 Zf Automotive Germany Gmbh Baugruppe aus einer Abdeckkappe eines Diffusors eines Rohrgasgenerators und einem Deflektorelement, Rohrgasgenerator und Verfahren zur Herstellung eines Rohrgasgenerators
DE102020104986A1 (de) * 2020-02-26 2021-08-26 Zf Automotive Germany Gmbh Gassackmodul, Verfahren zum Austausch eines Gasgenerators eines Gassackmoduls sowie Verfahren zur Herstellung eines Gassackmoduls
CN114212046A (zh) * 2021-12-30 2022-03-22 宁波均胜汽车安全系统有限公司 一种多向导流支架

Family Cites Families (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151838A (fr) * 1974-10-30 1976-05-07 Nippon Soken
JPS5211533A (en) * 1975-07-14 1977-01-28 Nippon Soken Inc Gas bag device
US5611566A (en) * 1992-08-20 1997-03-18 Temic Bayern-Chemie Airbag Gmbh Gas generator for a safety system for protecting occupants in motor vehicles
US5658008A (en) * 1994-07-19 1997-08-19 Takata (Europe) Vehicle Safety Technology Gmbh Airbag arrangement
DE4442202C2 (de) * 1994-11-17 1998-10-15 Petri Ag Beifahrer-Airbag-Modul
DE19506886A1 (de) * 1995-02-17 1996-08-22 Petri Ag Niederlassung Berlin Airbagmodul
JPH10181514A (ja) * 1996-12-26 1998-07-07 Kansei Corp 車両用エアバッグ装置のエアバッグモジュール構造
DE19704684C2 (de) * 1997-02-07 2000-08-10 Johnson Contr Interiors Gmbh Beifahrerairbagvorrichtung
EP0940304B1 (fr) * 1998-03-06 2005-08-03 TRW Automotive GmbH Canalisation de liaison pour un système de protection de passagers à coussin gonflable
DE19812915A1 (de) * 1998-03-24 1999-09-30 Takata Europ Gmbh Airbagvorrichtung für Kraftfahrzeuge
DE29815940U1 (de) * 1998-09-04 1998-10-15 TRW Automotive Safety Systems GmbH, 63743 Aschaffenburg Mittel zur Befestigung eines Gasgenerators in einem Airbagmodul
US20020105175A1 (en) * 1999-06-09 2002-08-08 Donald J. Lewis An inflatable seat belt anchorage and inflating system
JP3775123B2 (ja) * 1999-08-31 2006-05-17 日産自動車株式会社 車両のサイドエアバッグ装置
DE29917943U1 (de) * 1999-10-12 2001-02-22 Trw Repa Gmbh Beifahrer-Gassack-Rückhaltesystem
DE19957578B4 (de) * 1999-11-30 2012-11-15 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Aufblasbare Schutzvorrichtung für einen Insassen eines Kraftfahrzeuges
DE20003652U1 (de) * 2000-02-22 2000-04-20 Petri Ag, 63743 Aschaffenburg Strömungsleitvorrichtung zur Führung mindestens eines Gasstroms zur Füllung eines Gassacks und Airbagmodul
GB0015240D0 (en) * 2000-06-21 2000-08-16 Autoliv Dev Improvements in or relating to an air-bag
DE10031865C1 (de) * 2000-06-30 2002-01-31 Breed Automotive Tech Vorrichtung zum Befüllen eines Airbags
DE10131286C1 (de) * 2001-06-28 2002-11-21 Breed Automotive Tech Gaszufuhrleitung für ein Airbagmodul
JP3726722B2 (ja) * 2001-07-23 2005-12-14 トヨタ自動車株式会社 エアバッグ装置
DE10139626A1 (de) * 2001-08-14 2003-03-13 Takata Petri Ag Airbaganordnung
JP3951664B2 (ja) * 2001-10-25 2007-08-01 豊田合成株式会社 エアバッグ装置
JP3835264B2 (ja) * 2001-11-22 2006-10-18 豊田合成株式会社 頭部保護エアバッグ装置
US6629703B2 (en) * 2001-12-14 2003-10-07 Breed Automotive Technology, Inc. Opening device for a cold gas inflator
JP2003341467A (ja) * 2002-03-19 2003-12-03 Daicel Chem Ind Ltd キャップ付きインフレータ
US7004500B2 (en) * 2002-03-19 2006-02-28 Paul Dinsdale Dual stage inflator with extended gas delivery for a vehicular airbag system
DE20206340U1 (de) * 2002-04-22 2002-08-29 TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf Gassackmodul
DE10222085A1 (de) * 2002-05-17 2003-12-04 Trw Repa Gmbh Gasführungseinrichtung für ein Gassackmodul
DE20210948U1 (de) * 2002-07-19 2002-11-21 TRW Airbag Systems GmbH & Co. KG, 84544 Aschau Transportbaugruppe
DE20212384U1 (de) * 2002-08-12 2003-04-17 TRW Airbag Systems GmbH & Co. KG, 84544 Aschau Gaserzeugungsvorrichtung
DE10236905A1 (de) * 2002-08-12 2004-02-26 Trw Occupant Restraint Systems Gmbh & Co. Kg Verfahren zur Befestigung einer Gaslanze an einem Gasgenerator und Baugruppe mit einem Gasgenerator und einer Gaslanze
JP2004168103A (ja) * 2002-11-18 2004-06-17 Daicel Chem Ind Ltd エアバッグ用インフレータ
DE20300500U1 (de) * 2003-01-13 2003-06-18 TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf Gasgenerator und Gassackmodul
GB2399548B (en) * 2003-03-20 2006-03-22 Autoliv Dev Improvements in or relating to an air-bag arrangement
US7192052B2 (en) * 2003-09-24 2007-03-20 Autoliv Asp, Inc. Inflation assembly with extended filling capability
GB2406312A (en) * 2003-09-25 2005-03-30 Autoliv Dev Gas deflector
US7129126B2 (en) 2003-11-05 2006-10-31 International Business Machines Corporation Method and structure for forming strained Si for CMOS devices
DE10354560B4 (de) * 2003-11-21 2007-08-02 Trw Occupant Restraint Systems Gmbh & Co. Kg Gassackmodul
DE20319564U1 (de) * 2003-12-17 2004-04-15 Trw Airbag Systems Gmbh Gasgenerator
DE202004000801U1 (de) * 2004-01-20 2004-05-27 Trw Airbag Systems Gmbh Vorrichtung zum Betätigen eines Fahrzeugsicherheitssystems
US7384062B2 (en) * 2004-01-28 2008-06-10 Nihon Plast Co., Ltd. Airbag system
DE102004005555A1 (de) * 2004-02-04 2005-09-08 Autoliv Development Ab Airbag-Modul
US7121576B2 (en) * 2004-02-27 2006-10-17 Autoliv Asp Inc. Airbag retention collar for airbag module assembly
DE102004022732B3 (de) * 2004-05-07 2005-12-29 Trw Automotive Gmbh Baugruppe aus einem Gehäuse und einem Gasgenerator für ein Seitengassackmodul
JP4822693B2 (ja) * 2004-11-16 2011-11-24 タカタ株式会社 エアバッグ装置
US20080136154A1 (en) * 2005-02-15 2008-06-12 Autoliv Development Ab Airbag Inflator Gas Outlet and a Method of Manufacturing an Airbag Inflator
DE202005017267U1 (de) * 2005-05-18 2006-03-09 Trw Automotive Gmbh Gassackmodul
DE102005024846B4 (de) * 2005-05-27 2014-03-13 Autoliv Development Ab Gassack-Einheit
US20070063489A1 (en) * 2005-09-20 2007-03-22 Autoliv Asp, Inc. Quick connect airbag coupling
JP2007106215A (ja) * 2005-10-12 2007-04-26 Takata Corp 乗員拘束装置
DE102006048525A1 (de) * 2005-11-19 2007-05-24 Autoliv Development Ab Gasgenerator-Einheit und Baugruppe
DE202006007751U1 (de) * 2006-05-12 2006-07-27 Trw Automotive Safety Systems Gmbh Lenkvorrichtung für ein Kraftfahrzeug
DE102006041611A1 (de) * 2006-09-05 2008-03-06 Trw Automotive Gmbh Gasgenerator und Gassackmodul
DE102008029903A1 (de) * 2008-06-24 2009-12-31 Bayerische Motoren Werke Aktiengesellschaft Airbaggenerator
DE102008063789A1 (de) * 2008-12-18 2010-07-15 Takata-Petri Ag Gasstromverteiler für ein Gassackmodul eines Fahrzeuginsassen-Rückhaltesystem
US8007003B2 (en) * 2008-12-31 2011-08-30 Key Safety Systems, Inc. Air bag module with T-diffuser for inflator
JP5445083B2 (ja) * 2009-12-04 2014-03-19 タカタ株式会社 サイドエアバッグ装置
US8573644B1 (en) * 2010-04-14 2013-11-05 Tk Holdings Inc. Gas generating system
JP5489882B2 (ja) * 2010-06-29 2014-05-14 タカタ株式会社 側突用エアバッグ装置
DE102010039902A1 (de) * 2010-08-27 2012-03-01 Takata-Petri Ag Vorrichtungen für Personen-Schutzsysteme eines Fahrzeugs
DE102011080800A1 (de) 2011-08-11 2013-02-14 Hilti Aktiengesellschaft Handwerkzeugmaschine
JP5868635B2 (ja) * 2011-08-24 2016-02-24 株式会社ダイセル ガス発生器組立体
JP6494105B2 (ja) * 2015-08-06 2019-04-03 本田技研工業株式会社 インフレータ及びエアバッグ装置
DE102016005020B4 (de) * 2016-04-26 2019-08-14 Dalphi Metal Espana, S.A. Gassackeinheit und Fahrzeuginsassensicherheitssystem mit einer solchen Gassackeinheit sowie Herstellungsverfahren
US10207671B2 (en) 2016-11-18 2019-02-19 Trw Airbag Systems Gmbh Hybrid inflator with foam as a fuel
DE102017100858A1 (de) * 2017-01-18 2018-07-19 Trw Airbag Systems Gmbh Gasgenerator für ein Fahrzeugsicherheitssystem und Herstellungsverfahren
DE102019100262A1 (de) * 2018-10-02 2020-04-02 Trw Automotive Gmbh Baugruppe aus einem Diffusor und einem Gasgenerator, Gassackmodul und Verfahren zur Montage einer Baugruppe
DE102020115988A1 (de) * 2019-07-08 2021-01-14 Illinois Tool Works Inc. Filterdiffusor
US11654859B2 (en) * 2019-07-08 2023-05-23 Illinois Tool Works Inc. Filter diffuser
DE102019122989A1 (de) * 2019-08-27 2021-03-04 Zf Airbag Germany Gmbh Deflektor für einen Diffusor eines Gasgenerators, Diffusor-Deflektor Baugruppe mit einem solchen Deflektor, Gasgenerator mit einer solchen Diffusor-Deflektor Baugruppe, Herstellungsverfahren und Montageverfahren
DE102019122990A1 (de) * 2019-08-27 2021-03-04 Zf Automotive Germany Gmbh Baugruppe aus einer Abdeckkappe eines Diffusors eines Rohrgasgenerators und einem Deflektorelement, Rohrgasgenerator und Verfahren zur Herstellung eines Rohrgasgenerators
DE102019124202A1 (de) * 2019-09-10 2021-03-11 Zf Automotive Germany Gmbh Gassackmodul und Fahrzeugsitz und Fahrzeuginsassen-Schutzsystem

Also Published As

Publication number Publication date
US11951930B2 (en) 2024-04-09
JP7598364B2 (ja) 2024-12-11
CN114269609A (zh) 2022-04-01
JP2022546035A (ja) 2022-11-02
DE102019122987A1 (de) 2021-03-04
WO2021037469A1 (fr) 2021-03-04
US20220324410A1 (en) 2022-10-13

Similar Documents

Publication Publication Date Title
WO2021037469A1 (fr) Diffuseur pour un générateur de gaz, générateur de gaz doté d'un tel diffuseur et procédé de fabrication d'un tel diffuseur
DE102008028389B4 (de) Frontgassack und Ventileinrichtung
EP2222517A2 (fr) Sac gonflable pourvu d'une tubulure de remplissage et dispositif comprenant un sac gonflable et un générateur de gaz
EP4021766B1 (fr) Déflecteur pour un diffuseur de générateur de gaz, module diffuseur-déflecteur doté d'un tel déflecteur, générateur de gaz doté d'un tel module diffuseur-déflecteur, procédé de fabrication et procédé de montage
EP3891025B1 (fr) Générateur de gaz, module de coussin gonflable, système de sécurité de véhicule et procédé pour fabriquer un générateur de gaz
WO2014106567A1 (fr) Unité d'airbag
WO2016142083A1 (fr) Module de sac gonflable et véhicule
EP3658421B1 (fr) Système de protection contre le surallumage, second étage d'allumage, générateur de gaz ainsi que module airbag
DE202004001803U1 (de) Kaltgasgenerator
EP0877683B1 (fr) Generateur de gaz
EP4021764B1 (fr) Ensemble constitué d'une structure de recouvrement d'un générateur de gaz tubulaire et d'un élément déflecteur, générateur de gaz tubulaire et procédé de production d'un générateur de gaz tubulaire
DE102012007406A1 (de) Airbageinrichtung
DE102016124679A1 (de) Brennkammersieb, gasgenerator, gassackmodul und fahrzeugsicherheitssystem
EP2387518B1 (fr) Ensemble sac gonflable pour un système de retenue des occupants d'un véhicule
DE102007002681B4 (de) Frontgassack-Einheit
EP3165409B1 (fr) Ensemble airbag rideau et véhicule comprenant un tel ensemble airbag rideau
DE102008056948A1 (de) Airbagmodul für ein Kraftfahrzeug
DE19930239A1 (de) Airbageinheit und ein Verfahren zum Aufblasen eines Gassackes der Airbageinheit
EP3647126B1 (fr) Sac gonflable pour un système de retenue des occupants d'un véhicule
EP3511469B1 (fr) Dispositif amortisseur de chocs pour véhicules automobiles
WO2018166727A1 (fr) Module de coussin gonflable, volant de véhicule et système de retenue de passager de véhicule
DE102012006504A1 (de) Gasgenerator für eine Airbaganordnung eines Fahrzeugs und Fahrzeug mit der Airbaganordnung
DE102006014823A1 (de) Gassackanordnung mit gekrümmtem Gasverteilrohr
DE102017105347A1 (de) Gassackmodul und fahrzeuglenkrad mit einem solchen gassackmodul
DE10344904B4 (de) Verbindungsanordnung an einem Kraftfahrzeug zwischen einem Airbagmodul eines Fahrerairbags und einer Lenkradnabe

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220328

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

17Q First examination report despatched

Effective date: 20240412

18W Application withdrawn

Effective date: 20240503