Front bumper grille of a motor vehicle with front radar

Abstract

The invention relates to a grille (20) for the front bumper of a motor vehicle, the grille comprising: at least one perforated portion (36), a plate (26), a mounting area (38) behind the plate (26) and comprising lateral edges (40) adjacent to the at least one perforated portion; an obstacle detection device (30), such as a front radar, which is mounted in the mounting area. The grille further comprises a shock absorber (34), capable of absorbing energy from an impact against the plate; said shock absorber being mounted in the mounting area between the lateral edges in order to reduce displacement of the detection device in the event of a frontal impact against the plate. Figure to be published with the abbreviation: Figure 2

Description

Title of the invention: Front bumper grille of a motor vehicle with front radar

[0001] The invention relates to the low-speed front collision of a motor vehicle with a front detection device. The invention relates more specifically to the protection of a detection device integrated into a front bumper grille of a motor vehicle. The subject of the invention is a grille for a front bumper of a motor vehicle. The subject of the invention is also a motor vehicle.

[0002] A motor vehicle is commonly equipped with a plurality of detection devices intended to analyze the environment. This contributes to the detection of objects or bodies potentially forming obstacles. These detection devices thus contribute to passive safety, and offer driving assistance. Such detection devices generally comprise an ultrasonic generator and ultrasonic sensors, or at least one camera, or a radar, or a lidar. In order to optimize the monitoring of the front environment, it is known to arrange at least one detection device on the front panel, in the bumper.

[0003] The front bumper includes in particular a bumper skin which materializes the bodywork. Its various external elements contribute to the perceived quality by respecting fine and constant mechanical clearances. These elements include in particular a grid forming a mounting support for at least one of the detection devices. For reasons of repairability, the various external elements are capable of deforming, then returning to position following an impact at low speed; for example during a parking maneuver. However, such an event risks damaging the detection device mounted therein. Indeed, the latter is a particularly sensitive electronic component.

[0004] Document CN115038617A discloses a motor vehicle which is equipped with a front protective molding. The front protective molding comprises: a molding protection skin, a damping element extending in a transverse direction Y and fixed to the molding protection skin on an inner surface side of the protective molding, a radar support located at the front and extending under the damping element when the protective molding is mounted on the vehicle and fixed to the inner surface of the protective molding. The damping element comprises two damping stops located on either side of the radar support in the transverse direction, these stops being integral with a lower face of the damping element.

[0005] However, in the event of a front impact during parking, the radar support performs a significant stroke which risks damaging the radar. Furthermore, certain safety standards require precise return to position of the radar following such an 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 protect a detection device integrated into a front bumper grille of a motor vehicle. The invention also aims to optimize the protection of a detection device, the compactness of a front bumper grille of a motor vehicle.

[0007] According to a first aspect, the invention proposes a grille for a motor vehicle front bumper, the grille comprising: at least one perforated portion, a plate, a mounting area behind the plate and comprising lateral edges adjacent to the at least one perforated portion; an obstacle detection device which is mounted in the mounting area; remarkable in that the grille further comprises a shock absorber, capable of absorbing energy from an impact against the plate; said shock absorber being mounted in the mounting area between the lateral edges in order to reduce a displacement of the detection device in the event of a front impact against the plate.

[0008] It will be understood that the invention proposes a grid adding a deformable spacer at the detection device in order to limit its movement and absorb energy in the event of a possible impact. Thus, the kinematics of the detection device are controlled until the end of contact with the obstacle. The latter returns to its reference detection position; as well as the corresponding orientation. The risk of misadjustment decreases.

[0009] Preferably, the grid further comprises a fixing portion between the shock absorber and the detection device.

[0010] Preferably, the fixing portion comprises a horizontal flange fixed to the shock absorber and to the detection device.

[0011] Preferably, the grid comprises a rear face with at least one elastic portion capable of cooperating elastically with a cross member of a motor vehicle structure in the event of an impact against the grid.

[0012] Preferably, the at least one elastic portion comprises several elastic blades.

[0013] Preferably, the shock absorber comprises upper fixing means and lower fixing means.

[0014] Preferably, the shock absorber comprises a foam block.

[0015] Preferably, the lateral edges comprise lateral surfaces for positioning the shock absorber.

[0016] Preferably, the plate comprises a front surface and a rear surface; the shock absorber being against the rear surface.

[0017] Preferably, the shock absorber comprises a front portion mounted against the plate and a rear portion projecting rearwardly from the front portion.

[0018] Preferably, the plate is a central plate delimited transversely by the lateral edges.

[0019] Preferably, the grid comprises a rupture zone, the shock absorber extending longitudinally at the rupture zone.

[0020] Preferably, the detection device comprises a first thickness, and the shock absorber comprises a second thickness greater than the first thickness.

[0021] Preferably, the grid comprises a frame surrounding the at least one openwork portion and the plate, the frame comprising an orifice for mounting the shock absorber.

[0022] Preferably, the grid further comprises clamping means cooperating with the shock absorber.

[0023] Preferably, the plate extends over the entire height of the grid.

[0024] Preferably, the plate extends mainly vertically.

[0025] Preferably, the shock absorber is a single-piece.

[0026] Preferably, the shock absorber is arranged under the elastic portion.

[0027] Preferably, the shock absorber comprises a shock absorbing body.

[0028] Preferably, the shock absorber is inscribed in the contour of the plate.

[0029] Preferably, the shock absorber is bordered and / or delimited by the edges lateral.

[0030] Preferably, the fixing portion is vertically between the shock absorber and the detection device.

[0031] Preferably, the lateral positioning surfaces are transversely against the shock absorber.

[0032] According to another aspect, the invention relates to an assembly for a motor vehicle front bumper, the assembly comprising: a grille with two openwork portions; a mounting area between the openwork portions; lateral edges transversely delimiting the mounting area; the assembly further comprising an obstacle detection device which is mounted in the mounting area; remarkable in that the assembly further comprises a shock absorber mounted in the mounting area between the lateral edges, said shock absorber being capable of absorbing energy from an impact against the grille and reducing a displacement of the detection device in the event of a front impact against the grille. Such an architecture makes it possible to control the displacement of the detection device as well as its position following a front impact; in particular during parking maneuvers.

[0033] According to another aspect, the invention provides a motor vehicle comprising a front bumper with a grille; remarkable in that the grille is in accordance with the invention.

[0034] Preferably, the motor vehicle comprises a structure with a stop surface vertically at the level of the shock absorber, the shock absorber being above the detection device.

[0035] Preferably, the grid is a lower grid.

[0036] Preferably, the grid is under the crosspiece.

[0037] 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.

[0038] 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.

[0039] [Fig.l] is a front view of a motor vehicle according to the invention.

[0040] [Fig.2] shows from the inside a front bumper grille of a motor vehicle according to the invention.

[0041] [Fig. 3] represents a section of a front bumper grille of a motor vehicle according to the invention.

[0042] [Fig. 4] is a section of a shock absorber of a front bumper grille of a motor vehicle according to the invention.

[0043] [Fig. 5] is a front view towards the front of a shock absorber of a front bumper grille of a motor vehicle according to the invention.

[0044] 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 bumper grille 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.

[0045] In the present description, the term “longitudinal”, the term “longitudinally”, the term “transverse”, and the term “transversely” are used according to the reference frame of the vehicle, 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” designates the opposite of the front of the vehicle.

[0046] 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.

[0047] In the present description, the technical characteristics are defined in the grid mounting configuration, unless explicitly stated otherwise.

[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 front compartment which is optionally an engine compartment. 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. At the front, the structure comprises front side members 14. The front side members 14 extend at the level of the front compartment.

[0052] The motor vehicle 10 further comprises a bumper assembly 16, preferably a front bumper assembly 16 for the front bumper 18. The assembly 16, in particular each of the entities of the front bumper 18, is adapted to withstand impacts, at speeds up to 10 km / h, preferably up to 15 km / s, without there being any need to replace specific parts of the motor vehicle, and in particular all or part of the bumper skin elements 19. The front bumper assembly 16 for the front bumper 18 is also designed to limit the extent of injuries in the event of a pedestrian impact; in particular to the legs.

[0053] The bumper skin 19 delimits at least one air inlet opening; preferably two air inlet openings. These air inlet openings are equipped with at least one grille 20; for example an upper grille 22 and a lower grille 24. These grilles 20 form protections against projections. Each grille comprises an openwork portion; for example with a mesh. An openwork portion comprises a plurality of passages passing longitudinally through the grille 20. In the present illustration, the grilles have a hexagonal or diamond mesh. However, any other type of mesh can be adopted.

[0054] At least one grid 20, preferably the lower grid 24, is equipped with a plate 26. Subsequently in the description, the grid 20 will be described in relation to the lower grid 24. However, the present teaching can also be applied to the upper grid 22.

[0055] The plate 26 is transversely spaced from the lateral ends of the grid 20. The plate 26 is transversely between the openwork areas. The plate 26 is solid. It can be sealed. A plate 26 is understood to have a smooth and homogeneous extent. The middle of the grid 20 is transversely at the level of the plate 26. The plate 26 can be substantially laterally offset.

[0056] The grid 20 comprises a detection device 30. The detection device 30 is arranged behind the plate 26; in a mounting area of ​​the grid 20. The detection device 30 allows obstacle detection in front of the motor vehicle 10. Computer means make it possible to detect obstacles and determine their distance. It is coupled to an autonomous driving system and / or to a driving assistance system (not shown) of the motor vehicle 10. The detection device 30 comprises a radar, such as a front radar. Transversely, it is arranged in a central position in order to optimize the coverage of the environment. The plate 26 is in front of the detection device 30 in order to protect it.

[0057] The structure 12 further comprises a crossmember 32. The crossmember 32 is a horizontal beam extending laterally. The crossmember 32 reduces obstacle intrusion during a frontal collision. The crossmember 32 is attached to the front side members 14, and is capable of plastically deforming during a high-speed impact, for example at least 50 km / h. Thus, the deceleration is more gradual, which reduces the possibility of injury to passengers. The crossmember 32 is arranged between the upper grid 22 and the lower grid 24. It comprises a metal profile, for example made of steel or aluminum. Other alloys are envisaged in order to increase the capacity to absorb the energy of an impact. The crossmember 32 has an abutment surface capable of cooperating with a portion of the grid 20. According to one option, the crossmember comprises an upper portion extending transversely. The upper portion is profiled and is above the lower grid 24.

[0058] The grid 20 comprises a shock absorber 34. The shock absorber 34 is integrated into the grid 20. It is arranged within the extent of the plate 26. It is between the perforated portions. The shock absorber 34 is superimposed, and transversely at the level of the detection device 30. It is capable of cooperating with the abutment surface of the crosspiece 32; or any other abutment surface of the structure 12 which is arranged opposite. Thus, in the event of a frontal impact against the plate 26, the grid 20 deforms. The plate 26 moves back, driving the detection device 30. However, the shock absorber 34 limits the longitudinal travel. By deforming, it reduces the acceleration undergone; which preserves the shock absorber 34. Furthermore, it is included in the extent of the plate 26. Therefore, it does not disturb the behavior of the grid 20 in the event of an impact; and limits the creation of a localized hard point.

[0059] The motor vehicle may, for example, be a private motor vehicle or a utility motor vehicle.

[0060] [Fig. 2] shows a grille 20, such as a lower grille, of a front bumper of a motor vehicle. The motor vehicle corresponds to that shown in relation to [Fig. 1].

[0061] The grid 20 is seen from the inside of the motor vehicle, towards the front. The grid 20 comprises at least one openwork portion 36; preferably two openwork portions 36. They are, for example, lateral openwork portions. The grid also comprises a plate 26. The plate 26 is transversely between the openwork portions 36. According to one option, the plate 26 is surrounded by the at least one openwork portion 36. The openwork portions 36 have a stiffness lower than that of the plate 26.

[0062] The grid 20 has a mounting area 38. The mounting area 38 is behind the plate 26. The mounting area 38 may be a central area. It comprises lateral edges 40 adjacent to the perforated portions 36. The lateral edges 40 form walls extending vertically and longitudinally. The lateral edges 40 form the lateral edges of the plate 26. The plate 26 is a central plate delimited transversely by the lateral edges 40.

[0063] The grid 20 is equipped with a detection device 30. The detection device 30 is mounted in the mounting area 38, as is the shock absorber 34. The shock absorber 34 is housed in the mounting area 38, between the lateral edges 40. Thus, the shock absorber 34 is compact. It occupies a reduced area. Its action is targeted. It forms a micro shock absorber. Therefore, its mechanical effect is a precise control of the recoil of the plate 26 in the event of an impact. The detection device 30 benefits from this control since it is connected to the plate 26.

[0064] The grid 20 comprises a rear face 42 with at least one elastic portion 44. The rear face 42 is oriented towards the structure of the motor vehicle. The elastic portion 44 has a spring effect. It is capable of compressing longitudinally and then returning to position following a front impact during a parking maneuver. The elastic portion 44 is capable of cooperating elastically with a cross member of the motor vehicle structure in the event of an impact against the grid. Following the impact, the elastic portion 44 allows the grid 20, and therefore the detection device 30, to return to position. Its detection accuracy is preserved.

[0065] The elastic portion 44 comprises several elastic blades 46; for example four elastic blades 46. The elastic blades 46 form a horizontal row, for example on the upper edge of the grid 20. The elastic blades 46 make it possible to optimize the mass, compactness, and elasticity of the elastic portion 44.

[0066] [Fig. 3] shows a section of a grille 20 of a front bumper 18 which is mounted in front of the structure 12 of a motor vehicle. The motor vehicle corresponds to that shown in relation to one of Figures 1 to 2. The cross member 32 is shown.

[0067] The grid 20 comprises a plate 26 transversely delimited by two openwork portions 36 (only one being visible). In the present embodiment, the openwork portions 36 comprise several horizontal blades. They are connected by rods in order to form meshes. The plate 26 delimits a mounting zone 38 extending towards the rear. The mounting zone 38 is protected by the plate 26. It is in the thickness of the grid 20, for example in the thickness of the openwork portions 36. The mounting zone 38 and the plate 26 extend substantially over the entire height of the grid 20.

[0068] The mounting area 38 houses the detection device 30 and the shock absorber 34. The detection device 30 and the shock absorber 34 are superimposed. They are between the lateral edges 40 at the limit of the perforated portions 36. The shock absorber 34 is configured to compress in the event of an impact against the front bumper 18. The impact is transmitted throughout the grille 20 and is reflected to the shock absorber 34 when it reaches the structure 12. By deforming, it absorbs the energy of the impact. It acts in parallel with the elastic portion 44. The shock absorber 34 is placed under the elastic portion 44.

[0069] According to one option; the elastic portion 44 and the shock absorber 34 both bear on the cross member 32 in the event of a front impact. In particular, the elastic portion 44 cooperates with the transverse and / or profiled portion of the cross member 32, and the shock absorber 34 bears against a stop surface 48 which is under the profiled portion. The stop surface 48 is a front surface. It extends vertically and transversely. The stop surface 48 is vertically at the level of the shock absorber 34. It is vertically at a distance from the detection device 30 in order to avoid damaging it in the event of an impact. The shock absorber 34 is above the detection device 30.

[0070] The shock absorber 34 can deform permanently to increase its absorption potential. The elastic portion 44 allows the grid 20 and therefore the detection device 30 to return to position. It remains functional despite an impact likely to misalign it.

[0071] Along the longitudinal direction of the motor vehicle, the detection device 30 comprises a first thickness. The shock absorber 34 comprises a second thickness. The first thickness and the second thickness are maximum thicknesses. They are measured against the plate 26. The second thickness is greater than the first thickness; preferably by at least 50%; more preferably by at least 100%. This aspect optimizes the spacer and protection effect provided by the shock absorber 34 since it blocks the plate 26 and leaves the detection device 30 set back. It slows its recoil in the event of an impact.

[0072] [Fig.4] shows a shock absorber 34 of grid 20 for vehicle bumper automobile. The motor vehicle corresponds to that shown in relation to one of figures 1 to 3.

[0073] The shock absorber 34 comprises a front portion 50 pressed against the plate 26 and a rear portion 52 projecting rearwardly from the front portion 50. The front portion 50 is more extensive than the rear portion 52. It improves stability. It forms a mounting plate.

[0074] The grid 20 further comprises a fixing portion 54 between the shock absorber 34 and the detection device 30. The fixing portion 54 is vertically in the center of the plate 26. The fixing portion 54 comprises a horizontal flange 56 fixed to the shock absorber 34 and to the detection device 30. This facilitates the driving of the detection device 30 by the shock absorber 34 in the event of an impact. The horizontal flange 56 comprises a strip of material. It provides a dual function since it allows a double fixing, and makes it possible to keep the shock absorber 34 at a distance from the detection device 30.

[0075] The shock absorber 34 comprises upper fastening means 58 and lower fastening means 60. These fastening means may be protrusions. This arrangement improves the stability of the shock absorber 34 during impact. In order to optimize its mass, its strength, and its capacity to absorb energy, the shock absorber 34 comprises a foam block. The shock absorber 34 is a single-piece.

[0076] The plate 26 comprises a front surface 62 and a rear surface 64 longitudinally opposite the front surface 62. The plate 26 is a front plate. The shock absorber is positioned against the rear surface 64. The thickness of the shock absorber 34, in particular of the front portion 50 or of the rear portion 52, is greater than the thickness of the plate 26.

[0077] The grid 20 comprises at least one rupture zone 66, for example several rupture zones 66. Each rupture zone 66 comprises a reduction in thickness. The rupture zone 66 comprises at least one bent zone. The rupture zone 66 is configured to rupture in the event of an impact at a speed greater than a first speed threshold greater than a second speed threshold at which the shock absorber 34 compresses. The shock absorber 34 extends longitudinally at the rupture zone 66. This arrangement optimizes compactness.

[0078] The grid 20 comprises a frame 68 surrounding each openwork portion and the plate 26. The plate 26 and each openwork portion are made in one piece. They are produced by injection. The frame 68 may be a perimeter frame. The frame 68 has a mounting hole 70 for the shock absorber 34. The mounting hole 70 is open vertically. It passes vertically through the frame 68. The upper fixing means 58 are held in the mounting hole 70.

[0079] The grid 20 further comprises clamping means 72 cooperating with the absorber shock absorber 34. The clamping means 72 comprise a screw. They are arranged in the fixing portion 54. The clamping means 72 pass through the horizontal flange 56. The clamping means 72 improve the holding of the shock absorber 34. They allow it to be placed against the plate 26, then locked. Furthermore, they allow the shock absorber 34 to be replaced.

[0080] According to a preferred embodiment, the grid 20 comprises 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, vinyl ester or polyester-vinyl ester 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.

[0081] [Fig. 5] shows from the front the shock absorber 34 for the grille 20 of a motor vehicle bumper. The motor vehicle corresponds to that presented in relation to one of figures 1 to 4.

[0082] The shock absorber 34 has a front portion 50 mounted against the plate 26 and a rear portion 52 projecting rearwardly. The rear portion 52 is centered relative to the front portion 50, and relative to the plate 26. The rear portion 52 forms a stud. It extends longitudinally. In the event of an impact, the deformation of the shock absorber 34 is concentrated in the rear portion 52. The shock absorber 34 comprises a shock absorbing body. The shock absorber 34 is inscribed in the contour of the plate 26.

[0083] The fixing portion 54 supports the shock absorber 34. The fixing portion 54 passes transversely through the plate 26 and the mounting area 38. It comprises a horizontal flange 56 which extends vertically from the shock absorber 34 to the detection device (not shown). The horizontal flange 56 supports the clamping means 72 allowing the front portion 50 to be locked.

[0084] On either side of the mounting zone 38, and therefore at the limit of the plate 26; the lateral edges 40 comprise lateral positioning surfaces 74 for the shock absorber 34. The lateral positioning surfaces 74 are perpendicular to the transverse direction. They may be formed by the ends of the blades of the perforated portions. The lateral positioning surfaces 74 comprise a transverse gap adjusted to the transverse width of the shock absorber 34; preferably of the front portion 50. Thus, when it is placed in the mounting zone 38, the shock absorber 34 is embedded between the lateral positioning surfaces 74. Its stability is optimal.

[0085] The invention comprises the combination of all the embodiments shown by all the figures.

[0086] Figures 2 to 5 are isometric views. They each respect a specific scale.

Claims

Claims

1. Grille (20) for a front bumper (18) of a motor vehicle (10), the grille (20) comprising: at least one perforated portion (36), a plate (26), a mounting area (38) behind the plate (26) and comprising lateral edges (40) adjacent to the at least one perforated portion (36); an obstacle detection device (30) which is mounted in the mounting area (38); characterized in that the grille (20) further comprises a shock absorber (34), capable of absorbing energy from an impact against the plate (26); said shock absorber (34) being mounted in the mounting area (38) between the lateral edges (40) in order to reduce a displacement of the detection device (30) in the event of a front impact against the plate (26).

2. Grid (20) according to claim 1, characterized in that the grid (20) further comprises a fixing portion (54) between the shock absorber (34) and the detection device (30); preferably, the fixing portion (54) comprises a horizontal flange (56) fixed to the shock absorber (34) and to the detection device (30).

3. Grille (20) according to one of claims 1 to 2, characterized in that the grille (20) comprises a rear face (42) with at least one elastic portion (44) capable of cooperating elastically with a cross member (32) of the structure (12) of a motor vehicle (10) in the event of an impact against the grille (20); preferably the at least one elastic portion (44) comprises several elastic blades (46).

4. Grid (20) according to one of claims 1 to 3, characterized in that the shock absorber (34) comprises upper fixing means (58) and lower fixing means (60); preferably, the shock absorber (34) comprises a foam block.

5. Grid (20) according to one of claims 1 to 4, characterized in that the lateral edges (40) comprise lateral positioning surfaces (74) of the shock absorber (34); preferably the plate (26) comprises a front surface (62) and a rear surface (64); the shock absorber (34) being against the rear surface (64).

6. Grid (20) according to one of claims 1 to 5, characterized in that the shock absorber (34) comprises a front portion (50) mounted against the plate (26) and a rear portion (52) projecting rearwardly from the front portion (50); preferably the plate (26) is a central plate delimited transversely by the lateral edges (40).

7. Grid (20) according to one of claims 1 to 6, characterized in that the grid (20) comprises a rupture zone (66), the shock absorber (34) extending longitudinally at the rupture zone (66).

8. Grid (20) according to one of claims 1 to 7, characterized in that the detection device (30) comprises a first thickness, and the shock absorber (34) comprises a second thickness greater than the first thickness.

9. Grid (20) according to one of claims 1 to 8, characterized in that the grid (20) comprises a frame (68) surrounding the at least one perforated portion (36) and the plate (26), the frame (68) comprising a mounting orifice (70) for the shock absorber (34); preferably, the grid (20) further comprises clamping means (72) cooperating with the shock absorber (34).

10. Motor vehicle (10) comprises a front bumper (18) with a grille (20); characterized in that the grille (20) is in accordance with one of claims 1 to 9; preferably the motor vehicle (10) comprises a structure (12) with a stop surface (48) vertically at the level of the shock absorber (34), the shock absorber (34) being above the detection device (30).

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