Device for regulating the regulated air intake of a motor vehicle

Abstract

The invention proposes a regulating device (20) for regulated air intake at the front of a motor vehicle; the regulating device comprising an inner face (52); an outer face longitudinally opposite the inner face; a peripheral frame (32) with two vertical uprights (34), two horizontal sections (36) connecting the two vertical uprights (34); a longitudinal passage (38) passing through the peripheral frame (32); at least one shutter blade (40) through the longitudinal passage; an actuator (42) configured to move the at least one shutter blade (40) between a closed position and an open position. One of the two horizontal sections (36) comprises at least one guide tab (46) extending longitudinally and projecting from the inner face in order to guide said regulating device (20) relative to a crossmember (11) during a frontal collision. Figure to be published with the abstract: Figure 4

Description

Title of the invention: Device for regulating the regulated air intake of a motor vehicle

[0001] The invention relates to the pedestrian impact type collision of a motor vehicle. The invention relates to regulation devices for front controlled air intakes, likely to become stuck against a cross member of a motor vehicle. The invention relates more specifically to a regulation device for a motor vehicle. The invention also relates to a motor vehicle.

[0002] In order to optimize the aerodynamics of a motor vehicle, and thereby reduce primary energy consumption, controlled air intakes are installed on the front faces. This makes it possible to reduce CO2 emissions when the motor vehicle is a thermal vehicle. Controlled air intakes make it possible to optimize the aerodynamics of vehicles by adjusting the air intake to just the right amount. The closer they are to the overall surface, the greater the aerodynamic gain.

[0003] On electric vehicles in particular, two cross members dedicated to shock absorption will often be found. These cross members are part of the front bumper system, and are commonly referred to as beams. One is aligned with the vehicle's side members, and the other with the subframe. Since electric vehicles are less demanding in terms of air intake surface, the control device will very often be located opposite the single air intake on the front bumper, between the two cross members. The height of the air intake surface is often limited by the space available between the cross members. These have constraints in terms of size and height alignment with the superstructure that supports them, particularly in terms of safety. Therefore, we try to get as close as possible to them to obtain the largest possible air intake.

[0004] The disadvantage is that in the event of an impact with another vehicle or a pedestrian's leg, and due to the different rigidities of the bumper opposite the lower and upper cross members, the regulating device, also called a "cassette", will tend to pivot. From then on, it can no longer pass between the two cross members. In particular, each cross member is equipped with an absorber. These absorbers have different rigidities in the event of an impact against a pedestrian's leg. From then on, the leg tends to tilt relative to the vertical, and to push the regulated air intake sideways. This gets stuck sideways between the cross members. The risk is that the regulated air intake creates a hard point for the pedestrian's leg, increasing the bodily injury caused to the pedestrian. There is also a risk of increasing the damage caused to the front face, due to the lack of possible clearance during an impact with another vehicle.

[0005] Document US11643044B2 presents an assembly for a vehicle grille. The assembly comprises a front frame portion, a rear frame portion and a plurality of springs coupling the front portion to the rear portion such that the front frame is movable relative to the rear frame portion. The assembly also comprises an active grille shutter system. Such an assembly helps to absorb energy during a frontal collision. However, its travel is limited by its longitudinal thickness. From a certain depth, the front grille portion becomes a hard point likely to injure the leg of a pedestrian in the event of a pedestrian impact.

[0006] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to prevent a regulated air intake frame from forming a hard point in the event of a frontal impact. The invention also aims to optimize the safety, manufacturing cost, and positioning accuracy of a regulated air intake control device for a motor vehicle.

[0007] According to a first aspect, the invention proposes a regulating device for regulated air intake at the front of a motor vehicle; the regulating device comprising an internal face; an external face longitudinally opposite the internal face; a peripheral frame with two vertical uprights, two horizontal sections connecting the two vertical uprights; a longitudinal passage passing through the peripheral frame; at least one shutter blade through the longitudinal passage; an actuator configured to move the at least one shutter blade between a closed position and an open position; remarkable in that at least one of the two horizontal sections comprises at least one guide tab extending longitudinally and projecting from the internal face in order to guide said regulating device relative to a cross member during a frontal collision.

[0008] It will be clearly understood that the invention proposes a guide protrusion, or even a mechanical connection of the sliding type, between the crosspiece and one of the horizontal sections of the frame of the regulation device.

[0009] The guide tab allows the sliding movement to be accompanied and allows rotational locking about a transverse axis. The tilting of the regulating device is prevented during a collision of the pedestrian type despite unbalanced frontal support between the top and bottom of the frame. The risk of the frame locking askew is reduced and the probability of a hard point appearing is reduced. The guide tab promotes the correct telescoping of the regulating device and its movement towards a retracted position towards the rear.

[0010] Preferably, the at least one guide tab comprises a row of guide tabs.

[0011] Preferably, the row of guide lugs comprises lateral guide lugs transversely at the level of the two vertical uprights.

[0012] Preferably, the guide tab comprises a stiffening rib; preferably, the guide tab comprises a reduction in width towards the inside.

[0013] Preferably, the peripheral frame has a vertical end, a fixing flange at the vertical end, the at least one guide tab being vertically at the level of the fixing flange.

[0014] Preferably, the at least one guide lug comprises an excess thickness intended to cooperate with the crosspiece.

[0015] Preferably, the at least one guide tab comprises a longitudinal length of between 20 mm and 80 mm.

[0016] Preferably, the at least one guide tab comprises a longitudinal length of between 35 mm and 55 mm.

[0017] Preferably, the peripheral frame has a vertical end, the at least one guide tab being vertically at the level of the vertical end.

[0018] Preferably, the internal face is concave.

[0019] Preferably, the at least one guide tab is beveled in at least one direction.

[0020] Preferably, the closed position is a vertical position.

[0021] Preferably, the open position is an inclined position relative to the closed position.

[0022] Preferably, the at least one guide tab comprises a horizontal guide surface.

[0023] Preferably, vertically, at least one or each stiffening rib projects from the associated guide tab towards the longitudinal passage.

[0024] Preferably, the fixing flange is a front fixing flange.

[0025] Preferably, each shutter blade comprises a lower half with a pivot connection.

[0026] According to another aspect, the invention proposes a motor vehicle comprising a regulation device; remarkable in that the regulation device is in accordance with the invention; and in that the motor vehicle comprises a regulated air inlet, a crossmember, the at least one guide tab being vertically against said crossmember.

[0027] Preferably, the motor vehicle comprises a front bumper system with a protective grille in front of the regulated air inlet, a bumper skin surrounding the protective grille; the protective grille being in front of the regulating device.

[0028] Preferably, the front bumper system comprises a shock absorber against the cross member, said shock absorber having a longitudinal thickness, the peripheral frame being arranged in the longitudinal thickness of the shock absorber.

[0029] Preferably, the motor vehicle has a longitudinal separation between the peripheral frame and the crossmember, the at least one guide tab passing longitudinally through said longitudinal separation.

[0030] Preferably, the cross member is a lower cross member, the motor vehicle further comprises an upper cross member; the peripheral frame being vertically between the upper cross member and the lower cross member.

[0031] Preferably, the at least one guide lug extends longitudinally at the level of the upper crosspiece and the lower crosspiece.

[0032] Preferably, the motor vehicle has a longitudinal separation between the crossmember and said at least one of the two horizontal sections.

[0033] Preferably, the motor vehicle has a longitudinal separation between the frame and each crossmember, in particular between the peripheral frame and the upper crossmember and / or the lower crossmember.

[0034] Each characteristic introduced by the expression “preferably” given in relation to one of the aspects of the invention applies to all the other aspects of the invention.

[0035] The invention will be well understood and other aspects and advantages will appear clearly on reading the description which follows, given with reference to the figures appended and listed below.

[0036] [Fig.l] is a side view of a motor vehicle according to the invention.

[0037] [Fig.2] shows from below a regulation device of a motor vehicle according to the invention.

[0038] [Fig. 3] is a section of the motor vehicle front bumper system according to the invention.

[0039] [Fig.4] is a longitudinal view of an internal face of a motor vehicle regulation device according to the invention.

[0040] [Fig. 5] is an isometric view of the rear of a motor vehicle control device according to the invention.

[0041] [Fig. 6] shows in profile a guide tab of a motor vehicle regulation device according to the invention.

[0042] In the following description, the term "comprise" is synonymous with "include" and is not limiting in that it allows the presence of other elements in the motor vehicle or the control device to which it relates. It is understood that the term "comprise" includes the terms "consist of". The terms "external" and "internal" will designate respectively that which is oriented towards the outside of the vehicle and towards the inside of the vehicle.

[0043] In the present description, the term “longitudinal”, the term “longitudinally ", the term "transverse", and the term "transversely" are used according to the vehicle's reference frame, in the mounting configuration. The term "longitudinal" corresponds to the main direction of movement of the vehicle. The term "transverse" corresponds to a direction perpendicular to the main direction of movement of the vehicle. The term "front" refers to the main direction of movement of the vehicle. The term "rear" refers to the opposite of the front of the vehicle.

[0044] The X axis represents the longitudinal direction, the Y axis represents the transverse direction, and the Z axis represents the vertical direction of the motor vehicle. These three axes define a direct trihedron whose orientation is preserved throughout the figures.

[0045] In the present description, the ranges of values ​​include the limits which delimit them.

[0046] In the present description, the term "vertical" and the term "horizontal" are not to be understood in the strict sense of the term. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, even more preferably at most 2°; compared to the strict sense of these terms.

[0047] In this description, the technical characteristics are defined in the mounting configuration of the regulation device, unless otherwise explicitly mentioned.

[0048] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0049] [Fig.l] represents a motor vehicle 10 according to the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

[0050] The motor vehicle 10 comprises a structure 12. The structure 12 forms an outer body, or even a main frame of the motor vehicle. The structure 12 delimits different compartments of the motor vehicle 10, including the passenger compartment, the cargo compartment, the engine compartment (not shown). The structure 12 may be formed from an assembly of stamped sheets welded to each other.

[0051] The structure 12 connects different parts of the motor vehicle 10 including the openings. The structure 12 forms a mounting support for the powertrain, the suspension systems, the steering system, the braking systems. In the front part, the structure 12 comprises at least one crossmember 11, preferably two crossmembers 11. The crossmembers 11 are also designated as transverse beams.

[0052] These crosspieces 11 comprise an upper crosspiece 14 and a lower crosspiece 16. Each crosspiece 11 is equipped with a shock absorber 18. A shock absorber 18 is capable of absorbing impact energy in the event of a pedestrian impact and / or low-speed impact. Low speed means a speed of no more than 15 km / h. In the event of a pedestrian impacting a leg, it limits possible injuries. The impact absorber 18 comprises a foam block, or an air pocket. It contributes to safety.

[0053] The motor vehicle 10 further comprises a regulation device 20 associated with a regulated air inlet 22 which is in communication with a cooling facade 24. More generally, the cooling facade 24 forms a heat exchanger facade.

[0054] The regulating device 20 forms a flow control passage between the regulated air inlet 22 in front of the motor vehicle and the cooling facade 24. The regulating device 20 modulates the incoming air flow. The regulating device 20 forms a regulated air inlet module. The regulated air inlet 22 is advantageously a central inlet and / or a lower inlet. It communicates with the environment of the motor vehicle 10. The cooling facade 24 contributes to the cooling of the vehicle passenger compartment, and optionally to the cooling of a heat engine. The cooling facade 24 integrates at least one heat exchanger.

[0055] The regulated air inlet 22 generally has a protective grille (not shown) integrated into the bumper skin 26 of the front bumper system 28.

[0056] The regulating device 20 is arranged vertically between the upper cross member 14 and the lower cross member 16. It is under the shock absorber 18 associated with the upper cross member 14, and longitudinally set back from the latter. In the event of a front impact, this shock absorber 18 is thus impacted before the regulating device 20, which limits the hard points. Reducing the longitudinal thickness of the regulating device 20 makes it possible to reduce that of the shock absorber 18; and thereby a reduction in the front overhang of the motor vehicle 10. This contributes to a reduction in weight.

[0057] The motor vehicle may, for example, be a private motor vehicle or a utility motor vehicle.

[0058] According to one embodiment of the invention, the motor vehicle is an electric motor vehicle. For example, the motor vehicle comprises a single air inlet; preferably in the lower half of the bumper skin.

[0059] [Fig. 2] shows a motor vehicle control device 20. The motor vehicle may correspond to that shown in relation to [Fig. 1]. The upper cross member 14 and the lower cross member 16 are shown, as is a portion of the cooling facade 24.

[0060] The regulating device 20 comprises an internal face; an external face 30 longitudinally opposite the internal face; a peripheral frame 32 with two vertical uprights 34, two horizontal sections 36 connecting the two vertical uprights 34; at least one longitudinal passage 38 passing through the peripheral frame 32. Preferably Initially, the regulating device 20 has two longitudinal passages 38. The vertical uprights 34 form the lateral ends of the peripheral frame 32. The peripheral frame 32 is a single piece. It is made in one piece; for example using a molding process.

[0061] The regulating device 20 comprises at least one, preferably several, shutter blades 40 through the or each longitudinal passage 38. The shutter blades 40 are movable between a closed position and an open position; for example horizontal. They are driven; that is to say controlled by an actuator 42. The actuator 42 can be a jack or a motor. It is coupled to each shutter blade 40.

[0062] The regulating device 20 comprises at least one guide lug 46, for example distributed along at least one crossmember 11. The motor vehicle has a longitudinal separation 50 between the peripheral frame and the crossmember. The longitudinal separation 50 forms a recess. The at least one guide lug crosses longitudinally said longitudinal separation. It forms a bridge connecting the horizontal section 36 of the frame to the crossmember 11.

[0063] [Fig. 3] shows a part of a front bumper system 28 of a motor vehicle. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 2. The section cuts through the upper cross member 14 and the lower cross member 16, and is transversely spaced from the regulating device 20.

[0064] Several shutter blades 40 are visible in the closed position, in this case in the vertical position. In the closed position, the shutter blades 40 are joined and / or overlap vertically. The shock absorbers are not shown for the sake of clarity. This section cuts through shock-absorbing boxes 44 behind the crosspieces 11. A protective grille 48 protects the regulated air inlet 22; in front of the regulation device 20. The protective grille 48 forms an openwork screen according to a mesh.

[0065] The regulating device 20 comprises at least one guide lug 46, also called an anti-rotation pin. At least one of two horizontal sections 36 comprises a guide lug 46 extending longitudinally. Each guide lug 46 projects from the inner face 52 in order to guide said regulating device 20 relative to one of the crosspieces 11; during a frontal collision. For example, each guide lug 46 extends from the lower horizontal section. At least one or each guide lug 46 bears on the lower crosspiece 16, which allows vertical positioning.

[0066] Upon impact against a pedestrian or a fixed obstacle, the upper shock absorber will compress and allow a translation of the protective grid 48 and the regulation device 20. It also drives the regulation device 20 according to a tilting movement along a transverse axis of rotation. Thanks to the supports created by the guide lugs 46 on the lower crosspiece 16, the rotation of the regulating device 20 is sufficiently limited to allow the translation of the latter between the two crosspieces 11 without it becoming blocked between them. The pedestrian absorber can then compress conventionally without the leg encountering a hard point. The peripheral frame 32 is arranged in the longitudinal thickness of at least one of the shock absorbers.

[0067] The peripheral frame 32 is vertically between the upper crosspiece 14 and the lower crosspiece 16. The height of the vertical uprights 34 is less than the spacing between the crosspieces 11. The, or each, guide tab 46 extends longitudinally at the level of the upper crosspiece 14 and the lower crosspiece 16.

[0068] According to an alternative of the invention, the at least one guide tab comprises one; possibly a single; guide tab extending over substantially the entire transverse width of at least one of the two horizontal sections.

[0069] [Fig.4] shows the inner face of a regulating device 20 for an input regulated air of a motor vehicle. The motor vehicle may correspond to that shown in relation to one of figures 1 to 3.

[0070] The regulating device 20 regulates the regulated front air intake of the motor vehicle. The regulating device 20 has an inner face 52 and an outer face. The inner face 52 faces the rear of the vehicle. The inner face 52 is delimited by a peripheral frame 32 bordered by vertical uprights 34 which are connected by horizontal sections 36. The peripheral frame 32 delimits at least one longitudinal passage 38.

[0071] In the present embodiment, the longitudinal passage 38 is split into two parts, one left and one right. The longitudinal passage 38 is blocked by at least one shutter blade 40. Preferably, each longitudinal passage 38 is associated with a set of shutter blades 40. The actuator 42 is placed between these sets of shutter blades 40. It is configured to move each shutter blade 40 between a closed position (as shown on the left) and an open position (as shown on the right).

[0072] At least one of the two horizontal sections 36, in this case the lower one, comprises a guide tab 46 extending longitudinally and projecting from the internal face 52 in order to guide said regulating device 20 relative to a cross member 11 during a frontal collision.

[0073] Each shutter blade 40 includes a lower half with a pivot connection that allows it to tilt relative to the peripheral frame 32. The lower half is considered when the shutter blade 40 is in the closed position. The pivot connection is vertically towards the at least one guide tab 46.

[0074] The at least one guide lug 46 comprises a row 54 of guide lugs 46. The row 54 is a horizontal row. The row 54 of guide lugs 46 comprises lateral guide lugs transversely at the level of the two vertical uprights 34. The guide lugs 46 are distributed along the horizontal section 36 at the bottom, therefore over the transverse width of the peripheral frame 32.

[0075] According to one embodiment, the upper horizontal section comprises at least one guide lug. According to one embodiment, each horizontal section comprises at least one guide lug. According to one embodiment, each horizontal section comprises a row of guide lugs.

[0076] [Fig. 5] is an isometric view of a motor vehicle control device 20. The motor vehicle may correspond to that shown in relation to one of FIGS. 1 to 4.

[0077] The regulating device 20 comprises an internal face 52; an external face 30 longitudinally opposite the internal face 52. These faces are materialized by a peripheral frame 32 with two horizontal sections 36 secured by vertical uprights 34. The internal face 52 is concave, and the external face 30 is convex. A longitudinal passage 38 passes through the peripheral frame 32. The longitudinal passage 38 connects the external face 30 to the internal face 52.

[0078] The peripheral frame 32 carries at least one closure blade 40. Each closure blade 40 is movable between a closed position and an open position; thanks to the actuator 42. The movement is carried out according to a rotational movement along transverse axes of rotation. The actuator 42 is configured so as to at least partially open the longitudinal passage, on one side or on both sides.

[0079] On the internal face 52, the horizontal section 36, preferably that associated with the lower crossmember (not shown), comprises at least one projecting guide lug 46. Each guide lug 46 forms a protrusion, like a longitudinal blade. It is flat. Each guide lug 46 extends longitudinally and is capable of guiding the regulation device 20 relative to an adjoining crossmember during a frontal collision.

[0080] At least one or each guide tab comprises at least one stiffening rib 56. Each stiffening rib 56 projects from the associated guide tab 46 on the side of the longitudinal passage 38. At least one or each guide tab 46 comprises a decrease in width towards the inside.

[0081] [Fig. 6] shows a guide lug 46 of a regulating device 20 for a regulated air intake of a motor vehicle. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 5. The guide lug 46 is shown in profile.

[0082] The guide tab 46 forms a ski. It forms a pad intended to slide against the associated crosspiece. It forms the rear end of the regulating device 20. The guide lug 46 comprises a stiffening rib 56; preferably, the guide lug comprises a decrease in width towards the inside. The decrease in width can be vertical and / or transverse.

[0083] The peripheral frame 32 has a vertical end 58. The vertical end 58 may be a lower edge, preferably horizontal. It may be the lowest point of the regulating device 20. The peripheral frame 32 comprises a fixing flange 60 at the vertical end 58. The fixing flange 60 comprises fixing means such as fixing orifices 62. The guide tab 46 is vertically at the level of the fixing flange 60. The fixing flange 60 is optionally a front fixing flange. It is materialized by the horizontal section 36.

[0084] The guide tab 46 comprises a longitudinal length 64 of between 20 mm and 80 mm, preferably of between 35 mm and 55 mm. The elongation provided by this length allows longitudinal sliding during a collision. The length is also chosen in order to preserve the rigidity and the support of the guide tab 46. Thus, the invention provides a compromise between rigidity and guide travel.

[0085] The guide lug 46 comprises an extra thickness 66 intended to cooperate with the crosspiece (not shown). The extra thickness 66 is a vertical extra thickness. The extra thickness 66 is vertically opposite the stiffening rib 56. It reinforces the guide lug 46.

[0086] The guide lug 46 comprises a horizontal guide surface 68. The horizontal guide surface 68 is at least partially materialized by the excess thickness 66. The horizontal guide surface 68 promotes sliding on the crosspiece. It provides mechanical resistance to the guide lug 46.

[0087] Each characteristic defined in relation to one of the guide tabs 46 applies to each guide tab 46, unless otherwise stated.

[0088] According to a preferred embodiment, the peripheral frame 32, in particular each guide tab 46, is made of a plastic or composite material. The plastic material may comprise a thermoplastic material or a thermosetting material. According to a preferred embodiment, the plastic material is selected from the group comprising polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinylester or polyester-vinylester resins. For example, the composite material comprises a matrix of a plastic material as described above with a reinforcement. For example, the reinforcement comprises glass or carbon fibers.

[0089] The peripheral frame 32 comprises at least 10% by weight of plastic material recycled based on the total weight of the plastic material; preferably 10 to 80% by weight; more preferably 20 to 60% by weight or 30 to 40% by weight. The use of recycled plastic material reduces the vehicle's ecological footprint.

[0090] The invention comprises the combination of all the embodiments illustrated by all the figures.

[0091] Figures 2 to 6 are isometric views. They each respect a specific scale, real angles and real proportions.

Claims

Claims

1. A regulating device (20) for a regulated air intake (22) at the front of a motor vehicle (10); the regulating device (20) comprising an inner face (52); an outer face (30) longitudinally opposite the inner face (52); a peripheral frame (32) with two vertical uprights (34), two horizontal sections (36) connecting the two vertical uprights (34); a longitudinal passage (38) passing through the peripheral frame (32); at least one shutter blade (40) through the longitudinal passage (38); an actuator (42) configured to move the at least one shutter blade (40) between a closed position and an open position; characterized in that at least one of the two horizontal sections (36) comprises at least one guide tab (46) extending longitudinally and projecting from the internal face (52) in order to guide said regulating device (20) relative to a cross member (11) during a frontal collision.

2. Regulation device (20) according to claim 1, characterized in that the at least one guide lug (46) comprises a row (54) of guide lugs (46), preferably the row (54) of guide lugs (46) comprises lateral guide lugs transversely at the level of the two vertical uprights (34).

3. Regulation device (20) according to one of claims 1 to 2, characterized in that the guide tab (46) comprises a stiffening rib (56); preferably, the guide tab (46) comprises a reduction in width towards the inside.

4. Regulating device (20) according to one of claims 1 to 3, characterized in that the peripheral frame (32) has a vertical end (58), a fixing flange (60) at the vertical end (58), the at least one guide lug (46) being vertically at the fixing flange (60).

5. Regulation device (20) according to one of claims 1 to 4, characterized in that the at least one guide lug (46) comprises an excess thickness (66) intended to cooperate with the crosspiece (11) and / or the at least one guide lug (46) comprises a longitudinal length (64) of between 20 mm and 80 mm, preferably of between 35 mm and 55 mm.

6. Motor vehicle (10) comprising a regulating device (20); characterized in that the regulating device (20) conforms to one of of claims 1 to 5; and in that the motor vehicle (10) comprises a regulated air inlet (22), a cross member (11), the at least one guide tab (46) being vertically against said cross member (11).

7. Motor vehicle (10) according to claim 6, characterized in that the motor vehicle (10) comprises a front bumper system (28) with a protective grille (48) in front of the regulated air inlet (22), a bumper skin (26) surrounding the protective grille (48); the protective grille (48) being in front of the regulating device (20).

8. Motor vehicle (10) according to claim 7, characterized in that the front bumper system (28) comprises a shock absorber (18) against the cross member (11), said shock absorber (18) having a longitudinal thickness, the peripheral frame (32) being arranged in the longitudinal thickness of the shock absorber (18).

9. Motor vehicle (10) according to one of claims 6 to 8, characterized in that the motor vehicle (10) has a longitudinal separation (50) between the peripheral frame (32) and the cross member (11), the at least one guide tab (46) passing longitudinally through said longitudinal separation (50).

10. Motor vehicle (10) according to one of claims 6 to 9, characterized in that the cross member (11) is a lower cross member (16), the motor vehicle (10) further comprises an upper cross member (14); the peripheral frame (32) being vertically between the upper cross member (14) and the lower cross member (16); preferably, the at least one guide tab (46) extends longitudinally at the level of the upper cross member (14) and the lower cross member (16).

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