WO2023057698A1 - Structure avant de véhicule automobile avec reprise en choc frontal d'effort latéral par le groupe motopropulseur - Google Patents
Structure avant de véhicule automobile avec reprise en choc frontal d'effort latéral par le groupe motopropulseur Download PDFInfo
- Publication number
- WO2023057698A1 WO2023057698A1 PCT/FR2022/051692 FR2022051692W WO2023057698A1 WO 2023057698 A1 WO2023057698 A1 WO 2023057698A1 FR 2022051692 W FR2022051692 W FR 2022051692W WO 2023057698 A1 WO2023057698 A1 WO 2023057698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- motor vehicle
- powertrain
- force
- longitudinal beam
- structural longitudinal
- Prior art date
Links
- 238000005452 bending Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/082—Engine compartments
Definitions
- the invention relates to the field of motor vehicles, more particularly to the field of passive safety of motor vehicles.
- the aim of the invention is to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the aim of the invention is to improve the behavior of a motor vehicle with low recovery frontal impact test protocols.
- the subject of the invention is a motor vehicle comprising a passenger compartment; two structural longitudinal beams each extending forward from the passenger compartment; a powertrain disposed between the two structural longitudinal beams; remarkable in that said motor vehicle further comprises a force take-up part, arranged between a front end of at least one of the two structural longitudinal beams and the powertrain, and configured to transmit to the powertrain a force of interior horizontal bending of said structural longitudinal beam.
- the two structural longitudinal beams are commonly referred to as stretchers.
- the powertrain is of the electric type, more advantageously exclusively of the electric type.
- the at least one force-absorbing part has a main force-absorbing direction which is inclined, with respect to a direction perpendicular to a longitudinal axis of the motor vehicle, by a angle between 20° and 50°.
- the at least one force-absorbing part is located at the front of the powertrain.
- the at least one force-absorbing part is a rigid impactor with a first end rigidly fixed only to one of the structural longitudinal beam and of the powertrain.
- the first end is rigidly fixed to the powertrain.
- the at least one force-absorbing part comprises a second end facing each other, with a clearance, on the other side of the structural longitudinal beam and of the powertrain.
- the second end is fixed facing, with clearance, the structural longitudinal beam.
- the first end is a flange fixed to the powertrain and the second end has a front surface of L-section matching the structural longitudinal beam.
- the at least one force-absorbing part comprises a first end fixed to the powertrain, a second end fixed to the structural longitudinal beam and a connection with pivot(s) and/or ball joint (s) between said first end and said second end.
- the at least one force-absorbing part also comprises a sliding and rotating connection at the first end.
- the second end has a front surface of L-section matching and fixed to the longitudinal structural beam
- the invention also relates to a force-absorbing part for a motor vehicle, intended to be placed between a front end of a front structural longitudinal beam and a powertrain adjacent to said structural longitudinal beam, configured to transmit to the powertrain an interior horizontal bending force of said structural longitudinal beam.
- the force-absorbing part of the invention has all the characteristics described in relation to the motor vehicle of the invention.
- the measures of the invention are advantageous in that they profile the powertrain, in particular when the latter is of the electric type and thus of reduced size compared to a powertrain of the thermal type.
- the force-absorbing part(s) can be added in production to an existing vehicle model, in particular on motor vehicles intended for certain markets.
- the force recovery part(s) can also be pooled on several types of vehicles.
- the invention thus also has advantages of modularity.
- FIG 1 is a schematic representation of an underrun scenario and an avoidance scenario in the event of a frontal impact with low overlap
- FIG 2 is a view from above of the deformation of a motor vehicle front structure in the event of a frontal impact with low overlap, leading to an underrun scenario;
- FIG 3 is a perspective view of a force-absorbing part arranged between one of the two structural longitudinal beams and the powertrain, according to a first embodiment of the invention
- FIG 4 is a front view of the load-bearing part, the structural longitudinal beam and the power unit of Figure 3;
- FIG 5 is a perspective view of the force-absorbing part, alone, of Figures 3 and 4;
- FIG 6 is a perspective view of a force-absorbing part arranged between one of the two structural longitudinal beams and the powertrain, according to a second embodiment of the invention.
- FIG 7 is a perspective view of the force-absorbing part of Figures 6;
- FIG 8 is a perspective view of a variant of the force-absorbing part of Figures 6;
- FIG 9 is a view from above of the deformation of a motor vehicle front structure according to the invention, in the event of a frontal impact with low overlap, leading to an avoidance scenario.
- Figure 1 is an illustration of two possible scenarios in the event of a frontal collision according to the low overlap frontal collision protocol, detailed above in the Prior Technique part.
- the two illustrations at the top show a first scenario where the vehicle crashes into the obstacle, leading to strong deformations, strong decelerations and even a pivoting of the vehicle around the obstacle, illustrated by the circular arrow.
- This scenario is unfavorable in that the obstacle, which is rounded with a radius of curvature of 150mm, avoids the structural longitudinal beam, commonly called a stretcher, and collides with the front wheel to then crash into and deform the front apron. .
- the two illustrations at the bottom show a second scenario where the vehicle avoids the obstacle, by moving with a lateral component, this combined movement being illustrated by the straight arrow.
- This avoidance is advantageous in that not only the decelerations of the vehicle are lower but also the deformations of the passenger compartment are reduced.
- FIG. 2 is a top view of the front part of a motor vehicle in frontal collision with an obstacle following the low overlap frontal impact protocol mentioned above and in the process of undergoing an underrun scenario as illustrated to the top two illustrations in Figure 1 .
- the front structure of the motor vehicle 2 comprises a passenger compartment 4 delimited at the front by a front apron, two structural longitudinal beams 6, commonly referred to as stretchers, extending from the passenger compartment forwards, a front bumper crossmember 8 fixed to the front ends 6.1 of the two structural longitudinal beams 6 via the deformable boxes 10, commonly referred to by the English term “crashboxes".
- a powertrain 12 in this case of the electric type, is arranged between the two longitudinal structural beams 6 and fixed thereto by two engine mounts with an elastically deformable elastomer connection, more commonly referred to by the English expression "silent". -block ".
- the obstacle located in this case on the left side, is partially opposite the structural longitudinal beam 6 and, when it comes into contact with the front bumper crossmember 8, deforms in bending a front part of the structural longitudinal beam 6 in question.
- This bending deformation has the effect that the obstacle will run along the longitudinal structural beam 6 and then fit into the front apron.
- the bending deformation of the front part of the structural longitudinal beam 6 takes place despite the presence of the engine mounts 14 of the powertrain 12 essentially due to their flexibility and intrinsic deformability. They are in fact designed to absorb forces located mainly in a vertical plane.
- the present invention provides for the addition of a force take-up part, between the front end of at least one of the two structural longitudinal beams and the powertrain, and configured to transmit to the powertrain an interior horizontal bending force of said structural longitudinal beam during a low overlap frontal impact.
- Figures 3 to 5 illustrate such a force-absorbing part, according to a first embodiment of the invention.
- the reference numbers in Figure 2 are used in Figures 3 to 5 to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in relation to Figure 2.
- the front structure of the motor vehicle 102 comprises a force-absorbing part 116, arranged between the right-hand structural longitudinal beam 106 and the powertrain 112, close to and below the engine support 114 located on the same coast.
- the force-absorbing part 116 comprises a first end 116.1 rigidly fixed to the powertrain 112. In this case, the latter has the shape of a flange or fixing lug, it being extended that other forms of fixing are possible.
- the force-absorbing part 116 comprises a second end 116.2, opposite the first end 116.1, arranged opposite the structural longitudinal beam 106, more precisely the inner side face of the structural longitudinal beam 106 in question.
- the second end 116.2 has a clearance with the structural longitudinal beam 106 and is therefore not fixed there.
- the play can be between 1 and 10mm.
- the force-absorbing part 116 thus forms an impactor in that it only intervenes in the event of deformation of the longitudinal structural beam 106, laterally inwards, when said beam contacts the second end 116.2 of the part 116.
- the connection 116.3 between the first end 116.1 and the second end 116.2 is rigid, so as to ensure optimum transmission of force to the powertrain 112.
- first end 116.1 is located behind the second end 116.2, which gives the part force take-up 116 a main direction, illustrated by the center line, which is generally horizontal and inclined forwards from the first end 116.1 towards the second end 116.2.
- This inclination, relative to a transverse direction perpendicular to the longitudinal direction of the motor vehicle 102, is advantageously between 20° and 50°.
- FIG. 4 is a front view of the force-absorbing part, of the structural longitudinal beam and of the power unit of FIG. 3. It can be observed that the second end 116.2 has a front face with an L-section matching, with clearance, a lower and inner side part of the structural longitudinal beam 6. More specifically, the L-shaped profile forms between the two facets of the L an angle greater than 90°.
- the lower and inner side part of the structural longitudinal beam 106 facing the second end 116.2 comprises, from top to bottom, a vertical part corresponding to the inner side wall of the structural longitudinal beam 106, a predominantly horizontal part corresponding to a lower wall of the structural longitudinal beam 6, and a lower junction rabbet between two stampings forming the structural longitudinal beam 106, the lower junction rabbet being essentially vertical.
- FIG 5 is a perspective view of the load-bearing part, alone, of Figures 3 and 4. It can be seen that the load-bearing part 116 is a rigid part in its entirety, that is to say ie from the first end 116.1 to the second end 116.2 via the link 116.3.
- the force-absorbing part 116 is advantageously in one piece. It can be made of aluminum.
- the connection 116.3 may have one or more openings or cavities, allowing a gain in weight and material without losing efficiency given the large section of the connection 116.3.
- front face of the second end 116.2 comprises an upper horizontal facet intended to contact the inner side wall of the structural longitudinal beam and a horizontal facet lower surface, advantageously of smaller surface, intended to contact the lower junction rabbet, as mentioned above in relation to Figure 4.
- Figures 6 to 8 illustrate such a force-absorbing part, according to a second embodiment of the invention.
- the reference numbers of the first embodiment in FIGS. 3 to 5 are used in FIGS. 6 to 8 to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in relation with figures 3 to 5 as well as figure 2.
- the front structure of the motor vehicle 202 comprises a force-absorbing part 216, arranged between the structural longitudinal beam 206 on the left and the powertrain 212, close to and below the engine support 214 located on the same side.
- the force absorption part 216 differs from that of the first embodiment in Figures 3 to 5 essentially in that not only the first 216.1 is fixed to the powertrain 212 but also the second end 216.2 is fixed to the structural longitudinal beam 206, and in that it comprises at least one connection with pivot(s) and/or ball joint(s) 216.3 between said first end 216.1 and said second end 216.2.
- This connection with pivot(s) and/or ball joint(s) 216.3 provides a certain freedom of movement to the powertrain 212 while ensuring a transmission of force to said powertrain 212 in the event of deformation of the structural longitudinal beam 206, laterally towards inside.
- the second end 216.2 has a front face of L-section matching the structural longitudinal beam 206, more precisely its interior vertical side face and its interior lower face, adjacent to the interior vertical side face.
- the second end 216.2 is advantageously fixed by welding to the structural longitudinal beam 206, as shown by the two circles under the inner underside of said structural longitudinal beam 206.
- the first end 216.1 is located behind the second end 216.2, which gives the force-absorbing part 216 a main direction, illustrated by the center line, which is generally horizontal and inclined forward, from the first end 216.1 to the second end 216.2.
- This inclination, with respect to a direction transverse perpendicular to the longitudinal direction of the motor vehicle 202, is advantageously between 20° and 50°.
- FIG. 7 is a perspective view of the force-absorbing part 216 of FIG. 6.
- a rotation P1 and a translation M at the first end 216.1 produced by a sliding and rotating sleeve, a rotation P2 and a rotation P3 at both ends of the pivot connection 216.3 connecting the first and second ends 216.1 and 216.2 of the part recovery effort 216.
- FIG. 8 is a perspective view of a variant 216' of the force-absorbing part 216 of FIGS. 6 and 7.
- This variant 216' differs from the force-absorbing part 216 of FIG. 7 in that that the degree of freedom in rotation P2 is replaced by a degree of freedom of the ball joint type R.
- the degree of freedom in rotation P1 at the level of the sliding and rotating sleeve may be absent, in which case the sleeve may be sliding uniquely.
- FIG. 9 is a view from the top of a motor vehicle front structure according to the invention, undergoing a frontal impact with low overlap, leading to an avoidance scenario as illustrated in the two bottom images of FIG. Figure 9 is to be compared with figure 2 illustrating an embedding scenario.
- This limited flexion or absence of the front part of the structural longitudinal beam 106 or 206 has the effect, at the start of the impact, of laterally deflecting the motor vehicle 102 or 202.
- This lateral displacement of the motor vehicle is particularly favorable to the beginning of the shock, because the motor vehicle, as it advances relative to the obstacle, will naturally tend to avoid the obstacle.
- the direction of vehicle movement after lateral displacement is illustrated by the arrow presenting an inclination with respect to the horizontal corresponding to the initial direction before the impact.
- the motor vehicle may comprise a force take-up part on only one of the two left and right sides, advantageously on the driver's side, or even on each of the two sides.
- the force-absorbing parts can be identical, by symmetry, or different, as for example according to the first and the second embodiment described above.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22789625.5A EP4412887A1 (fr) | 2021-10-05 | 2022-09-07 | Structure avant de véhicule automobile avec reprise en choc frontal d'effort latéral par le groupe motopropulseur |
CN202280067213.9A CN118055879A (zh) | 2021-10-05 | 2022-09-07 | 正向碰撞中由动力总成吸收侧向作用力的机动车辆前结构 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2110527A FR3127742A1 (fr) | 2021-10-05 | 2021-10-05 | Structure avant de véhicule automobile avec reprise en choc frontal d’effort latéral par le groupe motopropulseur |
FR2110527 | 2021-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023057698A1 true WO2023057698A1 (fr) | 2023-04-13 |
Family
ID=78212378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/051692 WO2023057698A1 (fr) | 2021-10-05 | 2022-09-07 | Structure avant de véhicule automobile avec reprise en choc frontal d'effort latéral par le groupe motopropulseur |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4412887A1 (fr) |
CN (1) | CN118055879A (fr) |
FR (1) | FR3127742A1 (fr) |
WO (1) | WO2023057698A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2110527A5 (fr) | 1970-10-09 | 1972-06-02 | Bertoncini Gaston | |
DE4313785A1 (de) * | 1993-04-27 | 1994-11-03 | Daimler Benz Ag | Kraftfahrzeug mit einer zwei Längsträger aufweisenden Tragstruktur |
FR2921032A1 (fr) * | 2007-09-19 | 2009-03-20 | Peugeot Citroen Automobiles Sa | Impacteur de choc pour groupe motopropulseur automobile |
FR3011524A1 (fr) * | 2013-10-09 | 2015-04-10 | Peugeot Citroen Automobiles Sa | Vehicule automobile avec bras de deformation d’un des brancards en cas d’impact avant |
FR3081421A1 (fr) | 2018-05-24 | 2019-11-29 | Psa Automobiles Sa | Structure avant de vehicule favorisant l’evitement du vehicule par rapport a l’obstacle en cas de choc a faible recouvrement |
-
2021
- 2021-10-05 FR FR2110527A patent/FR3127742A1/fr active Pending
-
2022
- 2022-09-07 EP EP22789625.5A patent/EP4412887A1/fr active Pending
- 2022-09-07 WO PCT/FR2022/051692 patent/WO2023057698A1/fr active Application Filing
- 2022-09-07 CN CN202280067213.9A patent/CN118055879A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2110527A5 (fr) | 1970-10-09 | 1972-06-02 | Bertoncini Gaston | |
DE4313785A1 (de) * | 1993-04-27 | 1994-11-03 | Daimler Benz Ag | Kraftfahrzeug mit einer zwei Längsträger aufweisenden Tragstruktur |
FR2921032A1 (fr) * | 2007-09-19 | 2009-03-20 | Peugeot Citroen Automobiles Sa | Impacteur de choc pour groupe motopropulseur automobile |
FR3011524A1 (fr) * | 2013-10-09 | 2015-04-10 | Peugeot Citroen Automobiles Sa | Vehicule automobile avec bras de deformation d’un des brancards en cas d’impact avant |
FR3081421A1 (fr) | 2018-05-24 | 2019-11-29 | Psa Automobiles Sa | Structure avant de vehicule favorisant l’evitement du vehicule par rapport a l’obstacle en cas de choc a faible recouvrement |
Also Published As
Publication number | Publication date |
---|---|
CN118055879A (zh) | 2024-05-17 |
FR3127742A1 (fr) | 2023-04-07 |
EP4412887A1 (fr) | 2024-08-14 |
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