EP3941804A1 - Vehicle with central tunnel reinforcement and central tunnel reinforcement - Google Patents
Vehicle with central tunnel reinforcement and central tunnel reinforcementInfo
- Publication number
- EP3941804A1 EP3941804A1 EP20725821.1A EP20725821A EP3941804A1 EP 3941804 A1 EP3941804 A1 EP 3941804A1 EP 20725821 A EP20725821 A EP 20725821A EP 3941804 A1 EP3941804 A1 EP 3941804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- central tunnel
- reinforcement
- vehicle
- cross member
- central
- 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.)
- Pending
Links
- 230000002787 reinforcement Effects 0.000 title claims abstract description 97
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 229910001563 bainite Inorganic materials 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004904 shortening 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
- B62D25/20—Floors or bottom sub-units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/007—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of special steel or specially treated steel, e.g. stainless steel or locally surface hardened steel
-
- 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
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
Definitions
- the invention relates to a vehicle structure comprising a central tunnel and a front seat cross member.
- the invention also relates to a vehicle provided with such a structure.
- Motor vehicles have a central tunnel for the passage of links or for the incorporation of a transmission shaft between the rear axle and the front engine.
- the central tunnel also receives the exhaust pipe for the evacuation of exhaust gases resulting from the combustion of fuel.
- the central tunnel is formed by stamped sheets forming the vehicle body. It extends along the longitudinal axis of the vehicle. In the central position, it separates the front seats and crosses part of the passenger compartment lengthwise. Its central location allows you to attach controls, such as a gear lever.
- the central tunnel and the front stretchers have a shortened length compared to thermal motor vehicles. This makes it possible to place a propulsion battery under the floor, for example under the so-called row 1 front passenger seats.
- a propulsion battery under the floor, for example under the so-called row 1 front passenger seats.
- the shortening of the longitudinal structural members has an impact on the rigidity of the entire front structure. It was thus found that in the event of a frontal impact, under the effect of the forces at play, the central tunnel could sometimes lift in its portion inside the passenger compartment. This situation is not acceptable from the point of view of the safety of the occupants of the vehicle. A solution therefore remains to be found to remedy this problem.
- the aim of the invention is to provide a response to at least one of the problems and drawbacks encountered in the prior art.
- the aim of the invention is to provide a solution for improving the safety of vehicles with hybrid or electric motor vehicles in that it reduces, or even eliminates, the risks of the central tunnel lifting up in the event of a frontal impact.
- the invention also aims to provide a solution for both improving vehicle safety while reducing the possibility of generation of vibrations.
- the invention relates to a motor vehicle comprising a seat floor, a front seat cross member and a central tunnel, the vehicle is remarkable in that it comprises furthermore, a central tunnel reinforcement superimposed over at least part of the length of said central tunnel and showing a rear extension placed in support both on the front seat cross member and on the seat floor.
- the invention is particularly suitable for motor vehicles with electric or hybrid engines.
- the invention relates to an electric or hybrid motor vehicle comprising a seat floor, a front seat cross member, a central tunnel and a propulsion battery installed under said seat floor, the vehicle is remarkable in that it further comprises a central tunnel reinforcement superimposed over at least a part of the length of said central tunnel and showing a rear extension placed in support both on the seat cross member and on the floor of seated.
- the invention consists in providing the junction zone of the central tunnel and of the front seat cross member with a reinforcement arranged for lean on a floor to keep the central tunnel in position.
- the presence of this reinforcement makes it possible to secure the junction zone and to prevent too sudden lifting of the central tunnel zone in the event of a forward collision.
- the central tunnel is dimensioned, in its first portion, so as not to extend beyond the cross member front seat thus forming, with the latter, a T-structure.
- This configuration allows the installation of a sub-floor propulsion battery, the floor then being cut into several portions, the portion of the seat floor being arranged raised relative to the front floor portion receiving the central tunnel.
- the seat floor is arranged at the same height from the ground as the upper wall of the front seat cross member.
- the central tunnel reinforcement also acts as a speed control reinforcement making it possible to reduce, or even annihilate, the vibrations which may rise in the gear lever and / or generate unwanted noise.
- the central tunnel reinforcement is fixed by welding on said central tunnel.
- the reinforcement does not form a hollow body with the central tunnel. Welding is the simplest and strongest method of attachment. It is also advantageously used for fixing the reinforcement on the seat floor and on the front seat cross member.
- the central tunnel reinforcement is fixed by its rear extension to both the seat floor and to the front seat cross member by the same fixing means.
- the fixing means is a three-ply weld point.
- the vehicle is remarkable in that the central tunnel reinforcement has an upper wall and side wings superimposed on the central tunnel so that the upper wall reinforcement is resting on the upper wall of the central tunnel; preferably, the lateral wings of the reinforcement are in contact with the lateral wings of the central tunnel.
- the junction between the upper wall and the side wings of the central tunnel shows a rounding and the central tunnel reinforcement has the same rounding at its junction between its upper wall and the side wings so that that the central tunnel reinforcement is in contact with the central tunnel at the level of said roundings.
- the central tunnel reinforcement comprises an upper wall and side wings and the rear extension is an extension of the upper wall; and / or the rear extension comprises at least one opening for the passage of a fixing screw of a speed control box.
- the welded reinforcement piece is arranged at the node through which the forces pass in the event of a frontal impact.
- the reinforcement piece at least partially covers the tunnel central to ensure its hold and rests on the front seat cross member and the seat floor to prevent the central tunnel from lifting in the event of a frontal impact. This holding is reinforced by fixing said reinforcement to the seat floor and / or to the front seat cross member.
- the central tunnel showing a rear extension placed in support both on the front seat cross member and on the seat floor
- the vehicle is remarkable in that the rear extension of the central tunnel reinforcement is superimposes at least partly on the rear extension of the central tunnel and has at least one fixing lug for its attachment both to the front seat cross member and to the seat floor.
- said one or more fixing tabs are arranged so as not to overlap with the rear extension of the central tunnel.
- the central tunnel and its reinforcement are fixed to the front seat cross member and to the seat floor by different means.
- the front seat cross member comprising an upper wall and a front wall, the central tunnel comprising side wings showing a rear end, the vehicle is remarkable in that the rear end of the side wings of the tunnel center is placed against the front wall of the front seat cross member.
- the rear end of the side wings of the central tunnel reinforcement comprises at least one fixing lug resting against the front wall of the front seat cross member. More preferably, the rear end of the side wings of the central tunnel reinforcement comprises at least one fixing lug fixed to the front wall of the front seat cross member.
- the fact that the rear end of the central tunnel rests against the front seat cross member results from its shortened length for the installation of a sub-floor propulsion battery and the heightening of the floor seat in relation to the front floor.
- the fixing lugs of the side wings of the reinforcement reinforce the maintenance of the central tunnel by preventing the latter from flaring out under the effect of the forces received during a frontal impact.
- the fixing of the central tunnel reinforcement on the front wall of the front seat cross member is advantageously done by welding.
- the central tunnel reinforcement has at least one stiffening rib.
- the central tunnel reinforcement has at least one stiffening rib extending in the longitudinal direction of the vehicle and at least one stiffening rib extending in the transverse direction of the vehicle.
- the association of the different stiffening ribs forms a network of stiffening ribs.
- the central tunnel reinforcement has a network of stiffening ribs comprising at least one stiffening rib extending in the longitudinal direction of said reinforcement and at least one stiffening rib extending in the transverse direction of said reinforcement.
- the function of such a network of stiffening ribs is twofold. On the one hand, it contributes to the stiffening of the central tunnel reinforcement. On the other hand, it makes it possible to annihilate the vibrations which can go back into the gear lever.
- the central tunnel being a stamped sheet
- the vehicle is remarkable in that the central tunnel reinforcement is a stamped sheet of a thickness greater than that of the central tunnel.
- the central tunnel reinforcement is a sheet with a thickness greater than or equal to 0.7 mm; more preferably, of a thickness greater than or equal to 0.8 mm; more preferably still, of a thickness greater than or equal to 0.9 mm.
- the central tunnel reinforcement is made of two-phase type steel comprising a hard phase consisting of bainite and / or martensite dispersed in a ductile ferritic matrix.
- a hard phase consisting of bainite and / or martensite dispersed in a ductile ferritic matrix.
- the use of such a steel is advantageous because of the hardness it presents.
- the invention relates to a central tunnel reinforcement remarkable in that it has an upper wall and side wings, said reinforcement being dimensioned to at least partly cover a central tunnel with a vehicle according to the first aspect so as to be in contact with said central tunnel at least through its upper wall, and in that it also has a rear extension intended to be placed in support both on the front seat cross member and on the seat floor; preferably, the central tunnel reinforcement also has at least one stiffening rib
- Figure 1 shows a perspective view of an arrangement according to the invention comprising a central tunnel, a central tunnel reinforcement, a front seat cross member and a seat floor.
- Figure 2 is a view similar to Figure 1 but from a different viewing angle.
- the term “include” is synonymous with “include” and is not limiting in that it allows the presence of other elements in the vehicle. It is understood that the term “include” includes the terms “consist of”. Likewise, the terms “lower”, “upper”, “front”, “rear”, “longitudinal” and “transverse” will be understood with respect to the general orientation of the vehicle as taken in its normal sense. Steps. Thus, “lower” will denote a greater proximity to the ground than “upper” along the vertical axis. Likewise, the term “front” will indicate a positioning oriented towards the front of a vehicle in the horizontal direction and its normal direction of travel, and the term “rear” will indicate a positioning oriented towards the rear of a vehicle according to the position. same direction.
- the invention finds particular application in motor vehicles of the hybrid or electric type.
- the invention will therefore be described in relation to a motor vehicle of hybrid or electric type, but may be adapted by those skilled in the art to a vehicle with thermal motor.
- the front part of the floor of a motor vehicle of the hybrid or electric type is shown in Figure 1.
- the floor (1, 3) of this vehicle is cut into different portions arranged at different heights from the ground.
- the central tunnel 5 is arranged at the level of the front floor portion 1.
- the seat floor 3 is raised relative to the front floor 1.
- This configuration makes it possible to install a propulsion battery (not shown) under the floor. seat 3 by optimizing the space available for said battery and offering it a maximum implantation volume.
- the front seat cross member 7 is arranged between the front floor 1 and the seat floor 3 and forms a step.
- the front seat cross member 7 is a pressed steel section having the general shape of a straight S, that is to say that it has a vertical front wall and horizontal lower and upper walls.
- the central tunnel reinforcement 9 rests in support, and preferably is fixed, on the upper wall of the front seat cross member 7 by its rear extension 1 1 in addition to a support and d 'a possible attachment to the seat floor 3.
- the central tunnel reinforcement 9 is also attached to the front wall of the front seat cross member 7 by vertical fixing lugs arranged at the rear end of its side walls.
- the central tunnel 5 is dimensioned to extend in the longitudinal direction of the vehicle until it is placed opposite and, preferably, resting on the wall front of the front seat cross member 7. According to a preferred embodiment of the invention, the central tunnel 5, in its front portion, does not extend beyond the front seat cross member 7.
- the vehicle further comprises a central tunnel reinforcement 9 superimposed over at least part of the length of said central tunnel 5 and showing a rear extension 1 1 placed to rest both on the seat cross member 7 and on the seat floor 3.
- the reinforcement 9 of the central tunnel is a stamped sheet preferably made of steel.
- the central tunnel reinforcement 9 is made of two-phase type steel comprising a hard phase consisting of bainite and / or martensite dispersed in a ductile ferritic matrix.
- a hard phase consisting of bainite and / or martensite dispersed in a ductile ferritic matrix.
- Such steels are commercially available, for example, under the trade name Dual-Phase.
- the central tunnel reinforcement 9 has a thickness greater than or equal to that of the central tunnel 5.
- the central tunnel reinforcement 9 consists of a steel sheet with a thickness greater than or equal to 0.7 mm; more preferably, of a thickness greater than or equal to 0.8 mm; more preferably still, of a thickness greater than or equal to 0.9 mm.
- the reinforcement 9 of the central tunnel advantageously has a shape complementary to that of the central tunnel 5.
- the central tunnel 5 shows an upper wall and side wings forming an omega or inverted U section open towards the ground.
- the central tunnel reinforcement 9 also shows an upper wall and side wings, its rear extension 1 1 being an extension of its upper wall.
- the central tunnel reinforcement 9 is dimensioned to at least partially cover the central tunnel 5 by being superimposed on it and being in contact with it; preferably, the contact area is as large as possible, for example, the contact area is greater than 50% of the area, more preferably greater than 70% of the area of the central tunnel reinforcement.
- the junction between the top wall and the side wings of the central tunnel 5 shows a rounding and the central tunnel reinforcement 9 has the same rounding at its junction between its upper wall and the side wings so that the roundings are also in contact.
- the reinforcement 9 of the central tunnel does not form a hollow body with the central tunnel 5. Their contact allows the reinforcement 9 to be attached to the central tunnel 5 by welding.
- the reinforcement 9 of the central tunnel has a length less than or equal to the length of the central tunnel 5. For example, it has a length less than or equal to 80% of the length of the central tunnel; preferably, a length less than or equal to 50% of the length of the central tunnel 5.
- the reinforcement 9 of the central tunnel has a height less than or equal to the height of the central tunnel 5. For example, it has a lower height or equal to 90% of the height of the central tunnel, so as not to extend to the front floor 1.
- the rear extension 11 of the reinforcement 9 of the central tunnel is substantially flat and resting both on the top of the front seat cross member 7 and on the seat floor 3.
- the rear extension 1 1 has no side wings. It advantageously covers a rear extension (not shown) of the central tunnel 5 placed to bear both on the front seat cross member 7 and on the seat floor 3.
- the rear extension 1 1 of the reinforcement 9 of central tunnel has at least one fixing lug 13 for its fixing both to the front seat cross member 7 and to the seat floor 3. Said or said fixing lugs 13 are arranged so as not to overlap with the extension rear 11 of the central tunnel 5.
- the reinforcement 9 of the central tunnel is fixed by the fixing lugs 13 of its rear extension 1 1 both to the seat floor 3 and to the front seat cross member 7 by the same fixing means.
- the fixing means is a three-ply weld point.
- the rear end of the central tunnel 5 is placed opposite, or even in abutment, the front wall of the front seat cross member 7.
- the rear end side wings of the central tunnel reinforcement 9 will also rest against the front wall of the front seat cross member 7.
- the rear end of the side wings of the reinforcement 9 comprises at least one fixing lug 21 (visible in Figure 2) arranged vertically and resting against the front wall of the front seat cross member 7.
- the fixing of the central tunnel reinforcement on the front wall of the front seat cross member 7 is advantageously done by welding .
- the reinforcement 9 of the central tunnel has at least one stiffening rib 15.
- the central tunnel reinforcement 9 has at least one stiffening rib 15 extending in the longitudinal direction of the vehicle and at least one stiffening rib 15 extending in the transverse direction of the vehicle, so as to form a grid. on said reinforcement.
- Said stiffening ribs 15 extend both on the upper wall of the reinforcement and on its side wings.
- the rear extension 11 also has ribs 15 for stiffening.
- the rear end of the rear extension 1 1 of the reinforcement 9 of the central tunnel is positioned opposite a seat reinforcement 17, that is to say say of the transverse reinforcing piece 17 on which the passenger and driver seats are fixed, and possibly on which the devices of seatbelt.
- the central tunnel reinforcement 9 and the seat reinforcement 17 are not in contact.
- the reinforcement 9 of the central tunnel also has a speed control reinforcement function.
- At least one opening for the passage of a fixing screw 19 of the speed control unit will include at least one opening for the passage of a fixing screw 19 of the speed control unit.
- at least one fastening screw 19 of the speed control unit passes through an opening present on the rear extension of the reinforcement 9 of the central tunnel j
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1903001A FR3093984B1 (en) | 2019-03-22 | 2019-03-22 | VEHICLE WITH CENTRAL TUNNEL REINFORCEMENT AND CENTRAL TUNNEL REINFORCEMENT |
PCT/FR2020/050435 WO2020193894A1 (en) | 2019-03-22 | 2020-03-04 | Vehicle with central tunnel reinforcement and central tunnel reinforcement |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3941804A1 true EP3941804A1 (en) | 2022-01-26 |
Family
ID=67742599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20725821.1A Pending EP3941804A1 (en) | 2019-03-22 | 2020-03-04 | Vehicle with central tunnel reinforcement and central tunnel reinforcement |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3941804A1 (en) |
CN (1) | CN113613986A (en) |
FR (1) | FR3093984B1 (en) |
WO (1) | WO2020193894A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7464561B2 (en) | 2021-04-05 | 2024-04-09 | トヨタ自動車株式会社 | Vehicle body |
FR3121906B1 (en) * | 2021-04-15 | 2023-05-26 | Psa Automobiles Sa | Hybrid type vehicles |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002154459A (en) | 2000-11-21 | 2002-05-28 | Suzuki Motor Corp | Lower body structure of automobile |
JP4752471B2 (en) * | 2005-12-01 | 2011-08-17 | マツダ株式会社 | Vehicle body structure at the bottom of the vehicle |
WO2008084097A1 (en) * | 2007-01-11 | 2008-07-17 | Gm Global Technology Operations, Inc. | Body for a motor vehicle |
JP5821424B2 (en) * | 2011-08-31 | 2015-11-24 | マツダ株式会社 | Vehicle body structure |
DE102012109464B4 (en) * | 2012-10-05 | 2020-01-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Modular seat cross member |
CN106314568B (en) * | 2015-06-30 | 2018-12-11 | 长城汽车股份有限公司 | A kind of vehicle and vehicle floor |
JP6227681B2 (en) * | 2016-01-12 | 2017-11-08 | 本田技研工業株式会社 | Body structure |
DE102016203673A1 (en) * | 2016-03-07 | 2017-09-21 | Volkswagen Aktiengesellschaft | Body floor structure for a vehicle |
-
2019
- 2019-03-22 FR FR1903001A patent/FR3093984B1/en active Active
-
2020
- 2020-03-04 WO PCT/FR2020/050435 patent/WO2020193894A1/en unknown
- 2020-03-04 CN CN202080022612.4A patent/CN113613986A/en active Pending
- 2020-03-04 EP EP20725821.1A patent/EP3941804A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN113613986A (en) | 2021-11-05 |
WO2020193894A1 (en) | 2020-10-01 |
FR3093984A1 (en) | 2020-09-25 |
FR3093984B1 (en) | 2021-02-26 |
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Owner name: STELLANTIS AUTO SAS |