FR3141412A1 - Motor vehicle front bumper skin - Google Patents

Abstract

The invention proposes a front fascia assembly (16) for a motor vehicle. The front panel assembly includes a screen (28) with a vertical air inlet grille (30) and a front panel (50); a transverse panel (24) having an outer veil (68) and a rear face (58). The rear face has a positioning wing (62) with a rear edge (64), and a retaining groove (70) between the outer veil and the positioning wing. The front face comprises a protrusion (60) facing the rear edge of the positioning wing, and a retention stud (42) engaged in the retaining groove so as to maintain the transverse panel vertically relative to the screen. Figure to be published with the abstract: Figure 5

Description

Motor vehicle front bumper skin

The invention relates to a front fascia assembly for a motor vehicle. More precisely, the invention deals with the interface for maintaining a front fascia assembly of a motor vehicle. The invention also relates to a motor vehicle.

A front fascia of a motor vehicle includes a bumper skin and as such must comply with different requirements depending on the speed of the shocks that it is likely to absorb. For example, for a low speed impact, the front panel is designed to absorb the shock by elastic deformation, therefore without requiring subsequent repair. By low speed we mean an impact at a speed less than or equal to 10 km/h. During this impact, the bumper skin deforms elastically upon contact with the obstacle, then returns to position without any permanent deformation remaining after removal from the obstacle involved in the impact.

Around the bumper skin, the vehicle body has exterior panels completing the external envelope. Some of these panels depend on the openings of the vehicle, or directly on the structure of the vehicle. The bumper skin is precisely positioned in relation to these exterior panels in order to refine the separation clearances. Mastering the geometry of the separation clearances contributes to the perceived quality of the vehicle.

Furthermore, these exterior panels must offer a certain firmness to the touch, and more particularly at the level of the separation gaps. If a user presses a separation set, the panels must remain fixed in relation to each other. The width of the separation gap should remain constant as much as possible.

In addition to the exterior panels, the motor vehicle includes lighting devices, including the front headlights. These light devices make it possible to illuminate the environment and emit light signals to the outside. These light devices adjoin the bumper skin by defining other separation games; also involved in the perceived quality of the vehicle.

The front facade also has air inlets. For example, the air captured via the air inlets is used to cool a heat engine, or the passenger compartment via an air conditioning system. This air can also be used to supply oxygen to a combustion engine.

Document FR3071457A1 presents a motor vehicle comprising: a front bumper crossmember; a front bumper shield, placed in front of the crossmember; two headlights placed laterally on either side of the vehicle; vertically away from and above the crosspiece. The shield comprises, on an internal face, at least one support zone of said shield. The shield forms a shell in which a central opening is made receiving an air inlet grille. The support areas of the shield are formed or fixed on said grille. The vehicle also has a transverse panel fixed above the air inlet grille at the level of a holding interface.

When the vehicle is parked outdoors in sunny weather, the transverse panel heats up, especially when it is generally horizontal. It expands and deforms where it is attached to the air inlet grille. When the motor vehicle is traveling, vibrations generate noise pollution at the junction between the transverse panel and the air inlet grille. These noise nuisances disturb drivers or passengers, so that acoustic comfort is degraded. The perceived quality of the vehicle decreases.

The invention aims to respond to at least one of the problems or disadvantages encountered in the prior art. In particular, the invention aims to improve the perceived quality of a motor vehicle. The invention also aims to increase the acoustic comfort of a motor vehicle. The invention also aims to optimize the acoustic comfort and maintenance of a front fascia assembly of a motor vehicle.

According to a first aspect, the invention proposes a front facade assembly for a motor vehicle, said front facade assembly comprising a screen with a vertical air inlet grille, and a front face; a transverse panel having an outer veil and a rear face; remarkable in that the rear face of the transverse panel has a positioning wing with a rear edge, and a retaining groove between the outer veil and the positioning wing; and in that the front face comprises a protrusion facing the rear edge of the positioning wing, and a retention stud engaged in the retaining groove so as to maintain the transverse panel vertically relative to the screen.

The invention improves perceived quality by combining a protrusion and a retention pad. These entities provide functional surfaces avoiding noise linked to vibrations while providing firm support. This combination thus improves the perceived quality.

Preferably, the retention stud is transversely offset relative to the protrusion.

Preferably, the retention stud is vertically offset relative to the protrusion.

Preferably, the protrusion has a first longitudinal height, and the retention stud comprises a second longitudinal height greater than the first longitudinal height.

Preferably, the retaining groove has a horizontal receiving surface and a receiving surface inclined relative to the horizontal receiving surface, the retention stud has and a first facet cooperating with the inclined receiving surface, and a horizontal facet supporting against the horizontal receiving surface.

Preferably, the first facet is inclined relative to the horizontal facet by a first angle of between 15° and 60°.

Preferably, the first facet is inclined relative to the horizontal facet by a first angle of between 30° and 45°.

Preferably, the front face assembly comprises a longitudinal clearance between the protrusion and the rear edge of the positioning wing.

Preferably, the retention pad is a first retention pad, the protrusion is a first protrusion; the front face further comprises second studs identical to the first retention stud, and second protrusions identical to the first protrusion; the first retention stud and the second studs forming a row of studs, the first protrusion and the second protrusions forming a row of protrusions which is vertically spaced from the row of studs.

Preferably, the outer veil is inclined relative to the air inlet grille by a second angle of between 20° and 85°.

Preferably, the outer veil is inclined relative to the air inlet grille by a second angle of between 30° and 60°.

Preferably, the front fascia assembly further comprises at least one side bumper skin panel connected to the transverse panel via the screen.

Preferably, the transverse panel has a width greater than or equal to 1 m.

Preferably, the screen comprises a frame surrounding the air inlet grille.

Preferably, the screen comprises a front surface, the pad projecting longitudinally from the front surface; the transverse panel comprising a horizontal partition forming the horizontal receiving surface, the horizontal partition comprising a rear edge longitudinally spaced from the front surface.

Preferably, the front panel assembly includes a holding interface between the transverse panel and the screen.

Preferably, the holding interface further comprises fixing means, said fixing means comprising hooks secured to the screen, and eyelets secured to the transverse panel.

Preferably, the retaining groove extends transversely over at least half the width of the screen, more preferably substantially the entire width of the screen.

Preferably, the retention stud comprises a point with a junction facet connecting the first facet to the horizontal facet.

Preferably, the screen is vertical.

Preferably, the transverse panel is wider transversely than the screen.

According to another aspect, the invention proposes a front facade assembly for a motor vehicle, said front facade assembly comprising a screen with an air inlet grille, a transverse panel with a front face and a rear face, an interface holding vertically between the screen and the transverse panel, remarkable in that the rear face of the transverse panel has a holding groove at the holding interface, said holding groove having a horizontal receiving surface and an inclined receiving surface relative to the horizontal receiving surface, and in that the screen comprises a retention pad with and a first facet cooperating with the inclined receiving surface, and a horizontal facet bearing against the horizontal receiving surface.

According to another aspect, the invention proposes a front facade assembly for a motor vehicle, said assembly comprising an air inlet grille, a transverse panel with a front face and a rear face, a vertically fixing interface between the grille air inlet and a transverse panel, remarkable in that the rear face of the exterior panel has a retaining groove with a first bearing surface and a second bearing surface inclined relative to the first surface of support, and in that the air inlet grille comprises an indexing pad with a lower face resting against the horizontal support surface; and a front face parallel to the inclined support surface.

According to another aspect, the invention proposes a motor vehicle comprising a front facade assembly, remarkable in that the front facade assembly conforms to the invention.

Preferably, the transverse panel is above the screen.

Preferably, the motor vehicle comprises a front flap with a front edge matching the transverse panel.

Preferably, the motor vehicle comprises two light devices, the screen being arranged between said two light devices, the transverse panel extending transversely along the two light devices.

Preferably, the transverse panel extends transversely over at least half the width of the motor vehicle.

Preferably, the light devices comprise upper zones, the transverse panel being fixed to said upper zones.

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.

There is a front view of a motor vehicle according to the invention.

There shows a front fascia assembly of a motor vehicle according to the invention.

There is an isometric view of the mounting edge of the overall front fascia screen of a motor vehicle according to the invention.

There is an enlargement of the .

There is a section of an interface for maintaining a front fascia assembly of a motor vehicle according to the invention.

In the description which follows, the term “include” is synonymous with “include” and is not restrictive in that it authorizes the presence of other elements of the front fascia assembly or in the motor vehicle to which it is attached. reports. It is understood that the term “understand” includes the terms “consist of”. The terms “external” and “internal” will respectively designate what is oriented towards the exterior of the vehicle and towards the interior of the vehicle.

In this description, the term “longitudinal”, the term “longitudinal”, the term “transverse”, and the term “transversely” are used according to the reference of the vehicle, in the assembly 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.

The X axis represents the longitudinal direction, the Y axis represents the transverse direction, and the Z axis represents the vertical direction. These three axes define a trihedron whose orientation is preserved throughout the figures.

In this description, the value ranges include the limits which delimit them.

Through the description, the different figures use the same reference signs to designate identical or similar entities.

There 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.

The motor vehicle 10 comprises a structure 12, also called a body. The structure 12 forms a framework and supports various components of the motor vehicle 10, including the engine and openings. The structure 12 partially forms the bodywork 14 of the vehicle at the level of the roof, the front wings, the “C” pillars. The bodywork 14 forms the external envelope of the motor vehicle 10.

The motor vehicle 10 further comprises a front facade assembly 16. The front facade assembly 16, in particular each of its elements, is adapted to withstand impacts at speeds up to 10 km/h, preferably up to at 15 km/s, without there being any need to replace specific parts of the vehicle, and in particular all or part of the bumper skin 18.

The front facade assembly 16 also includes at least one light device 20. In this case two light devices 20 are provided, on either side of the bumper skin 18. Each light device 20 is a light device regulatory. A light device 20 commonly has a housing and a transparent wall on the outside, which houses one or more light sources. The light sources are capable of illuminating the environment at a distance from the vehicle for driving comfort, and capable of emitting light signals to the attention of other users.

The motor vehicle 10 also includes a front flap 22, also called front hood. The front flap 22 is pivotally mounted relative to the structure 12. It gives access to the front compartment, which is possibly an engine compartment. It transversely connects the front wings which delimit the wheel arches.

The front panel assembly 16 includes a transverse panel 24. The transverse panel 24 is under the front flap 22, and in front. The front flap 22 has a front edge 26 matching the transverse panel 24. The front edge 26 can be a lower edge. The transverse panel 24 separates the front flap 22 from the light devices 20. The housings of the light devices 20 include upper areas for mounting the transverse panel 24. The transverse panel 24 has a width, in the transverse direction, greater than or equal to 1 m .

The front facade assembly 16 comprises at least one screen 28 with an air inlet grille 30. The air inlet grille 30 is generally vertical. The air inlet grille 30 is generally perpendicular to the longitudinal direction. The transverse panel 24 forms a junction strip between the air inlet grille 30 and the front flap 22.

There presents a front fascia assembly 16 of a motor vehicle. The motor vehicle may correspond to that presented in relation to the . The light devices are not shown for the sake of clarity, and leave lateral clearances 32 with corresponding contours in the front facade assembly 16.

The transverse panel 24 has a front surface 34 and a rear surface. The front surface 34 is the exterior visible surface, the rear surface is longitudinally opposite the front surface 34. The transverse panel 24 connects the side clearances 32 intended to receive the light devices. The transverse panel 24 is wider transversely than the screen 28.

The front panel assembly 16 further comprises a holding interface 36 vertically between the screen 28 and the transverse panel 24. The holding interface 36 is generally horizontal. It includes mechanical clearance between the holding interface 36. The holding interface 36 may include fixing means.

The front facade assembly 16 further comprises at least one, preferably two side panels 38 forming the bumper skin 18. The side panels 38 are connected to the transverse panel 24 via the screen 28. The screen 28 is arranged between the side panels 38. The screen 28 is partially meshed or completely meshed. The air inlet grille 30 can extend over at least half of, or the entire surface of, the screen 28. The screen 28 optionally comprises a frame 31 surrounding the air inlet grille 30. The frame 31 makes it possible to stiffen the screen 28.

The 30 air inlet grille is an upper air inlet grille. In the present embodiment, the front panel assembly 16 includes an optional lower air inlet grille 40, vertically below and at a distance from the upper air inlet grille.

In the present illustration, the air inlet grilles (30; 40) have square or hexagonal meshes. However, any other type of mesh can be chosen in order to optimize mechanical protection, resistance and thermal behavior.

There presents the mounting edge 54 of the screen 28 at the level of the holding interface 36 of the front fascia assembly 16 for a motor vehicle. The motor vehicle may correspond to that presented in relation to one of Figures 1 to 2. The air inlet grille is not shown for the sake of clarity.

Mounting edge 54 is part of screen frame 28. Mounting edge 54 may be a top edge. The screen 28 includes a front face 50. The front face 50 has a complex geometry due to the presence of the air inlet grille and the mounting edge 54. The front face 50 is generally vertical. It extends transversely. Mounting edge 54 includes a front surface 56. Front surface 56 extends vertically and transversely. The front surface 56 extends over the entire width of the screen 28.

The front face 50 comprises at least one retention pad 42, preferably a plurality of identical retention pads 42 (only four shown). The retention studs 42 project longitudinally; forward ; from the front surface 56. The plurality of retention pads may comprise at least eight, preferably at least sixteen retention pads 42. Each retention pad 42 can be a position indexing pad. The retention pads 42 form plates perpendicular to the front surface 56.

The retention pads 42 form a row of pads which extends transversely. The plurality of retention pads 42 comprises a first pad, and second pads identical to the first pad, the first pad and the second pads being distributed transversely over the width of the screen, or distributed along the holding interface 36. Thus , the pads provide support and positioning all along the holding interface 36. The retention pads 42 are grouped in pairs. This allows for firmer support while limiting mass.

The front face 50 comprises at least one protrusion 60, preferably a plurality of identical protrusions 60 (only five shown). The protrusions 60 project longitudinally from the front surface 56. The plurality of protrusions 60 may comprise at least eight, preferably at least sixteen protrusions 60. The protrusions 60 form bumps or extra thicknesses. They have flat ends.

The protrusions 60 form a row of protrusions extending transversely. The plurality of protrusions 60 includes a first protrusion, and second protrusions identical to the first protrusion. The identical protrusions are distributed transversely over the width of the screen 28, or distributed along the holding interface 36. The row of protrusions is offset relative to the row of studs. The row of studs is superimposed on the row of protrusions. These rows are generally parallel.

The retention pads 42 are offset transversely in relation to the protrusions 60. This aspect makes it possible to distribute the points of contact with the transverse panel 24. At the same time, this arrangement makes it possible to avoid jamming the rear edge, and lets it slide in the event of expansion. Set 16 maintains flexibility. Hyperstatism is limited.

The holding interface 36 further comprises fixing means (not shown), said fixing means comprising hooks secured to the screen, and eyelets 37 secured to the transverse panel. These means allow fixation, in addition to the contact provided by the retention pads 42. The eyelets 37 are distributed transversely along the holding interface 36.

There is an enlargement of the at the height of a protrusion 60 and a pair of retention studs 42. For the sake of brevity, the description which follows will be carried out in relation to a retention stud, however it applies to each retention stud of the row of studs.

The retention pad 42 has a first facet 44 and a horizontal facet 46. The first facet 44 can be a front facet. The horizontal facet 46 may be a lower facet. The horizontal facet 46 and the first facet 44 can be vertically opposed.

The first facet 44 is inclined relative to the horizontal facet 46 by a first angle A1 between: 10° and 70°, preferably between 15° and 60°, more preferably between 30° and 45°. These value ranges provide a compromise between positioning precision and firmness of support.

The retention pad 42 comprises a point with a junction facet 48 connecting the first facet 44 to the horizontal facet 46. According to a variant of the invention, the first facet to the horizontal facet are directly contiguous.

The first facet 44 begins at a distance from the front surface 56. The retention pad 42 comprises an upper facet 52 forming a separation between the first facet 44 and the front surface 56. Alternatively, the first facet begins against the front surface.

There presents a section of the front fascia assembly 16 for a motor vehicle. The motor vehicle may correspond to that presented in relation to one of Figures 1 to 4. A single retention stud 42 and a single protrusion 60 are visible. However, this description applies to the entire row of studs 42 and to the entire row of protrusions 60.

The rear face 58 of the transverse panel 24 has an outer wall 68 and a positioning wing 62. The positioning wing 62 forms a horizontal partition. The positioning wing 62 extends horizontally from the outer veil 68 towards the mounting edge 54. The positioning wing 62 has a rear edge 64. The rear edge 64 faces the front face 50 of the screen 28, and in particular of the front surface 56. Optionally, the front facade assembly 16 comprises a longitudinal clearance 66 between the protrusion 60 and the rear edge 64. The longitudinal clearance 66 can measure from 1 mm to 2 mm in the configuration of factory assembly. It is likely to close in the event of expansion of the transverse panel 24.

The rear edge 64 is oriented towards the protrusion 60, which makes it possible to abut against the latter in the event of deformation; possibly triggered by expansion. Since all of the protrusions 60 have a reduced surface area compared to the entire front surface 56, any friction will emit little or no noise. Thus, acoustic comfort is preserved; just like perceived quality.

The rear face 58 also has a retaining groove 70. The retaining groove 70 extends transversely. The retaining groove 70 is delimited in front by the outer veil 68 and the positioning wing 62. The retaining groove 70 is open towards the rear, therefore towards the front surface 56.

The retention stud 42 is engaged in the retaining groove 70 so as to maintain the transverse panel 24 vertically relative to the screen 28. The retention stud 42 allows retention along the Z axis, and therefore vertical positioning. The retention stud 42 is vertically offset relative to the protrusion 60. It is above. They are vertically separated.

The protrusion 60 has a first longitudinal height H1, and the retention stud 42 comprises a second longitudinal height H2 greater than the first longitudinal height H1. The second longitudinal height H2 is at least five times greater than the first longitudinal height H1, which optimizes support, acoustic comfort and compactness.

The retaining groove 70 has a horizontal receiving surface 72 and an inclined receiving surface 74 which is inclined relative to the horizontal receiving surface 72. The first facet 44 of the retention pad 42 is parallel to the inclined receiving surface 74 Optionally, the first facet 44 matches and/or is in contact with the inclined receiving surface 74. The horizontal facet 46 of the retention pad 42 bears against the horizontal receiving surface 72. Thus, the retention pad 42 allows. to ensure longitudinal and vertical positioning between the transverse panel 24 and the screen 28. In addition, it ensures firmer support. This again improves the perceived quality.

The outer veil 68 is inclined relative to the air inlet grille 30 by a second angle A2 of between 20° and 85°, preferably between 30° and 60°.

Claims (10)

Front facade assembly (16) of a motor vehicle (10), said front facade assembly (16) comprising a screen (28) with a vertical air inlet grille (30), and a front face (50); a transverse panel (24) having an outer veil (68) and a rear face (58); characterized in that the rear face (58) of the transverse panel (24) has a positioning wing (62) with a rear edge (64), and a retaining groove (70) between the outer web (68) and the positioning wing (62); and in that the front face (50) comprises a protrusion (60) facing the rear edge (64) of the positioning wing (62), and a retention stud (42) engaged in the retaining groove (70) so as to maintain vertically the transverse panel (24) relative to the screen (28). Front facade assembly (16) according to claim 1, characterized in that the retention stud (42) is transversely offset relative to the protrusion (60), preferably the retention stud (42) is vertically offset relative to the protrusion (60). Front facade assembly (16) according to one of claims 1 to 2, characterized in that the protrusion (60) has a first longitudinal height (H1), and the retention stud (42) comprises a second longitudinal height (H2 ) greater than the first longitudinal height (H1). Front facade assembly (16) according to one of claims 1 to 3, characterized in that the retaining groove (70) has a horizontal receiving surface (72) and an inclined receiving surface (74) relative to the horizontal receiving surface (72), the retention pad (42) has and a first facet (44) cooperating with the inclined receiving surface (74), and a horizontal facet (46) bearing against the horizontal receiving surface ( 72). Front facade assembly (16) according to claim 4, characterized in that the first facet (44) is inclined relative to the horizontal facet by a first angle (A1) between 15° and 60°, preferably between 30° ° and 45°. Front panel assembly (16) according to one of claims 1 to 5, characterized in that the front panel assembly (50) comprises a longitudinal clearance (66) between the protrusion (60) and the rear edge (64) of the positioning wing (62). Front facade assembly (16) according to one of claims 1 to 6, characterized in that the retention stud (42) is a first retention stud, the protrusion (60) is a first protrusion; the front face (50) further comprises second studs identical to the first retention stud, and second protrusions identical to the first protrusion; the first retention stud and the second studs forming a row of studs, the first protrusion and the second protrusions forming a row of protrusions which is vertically spaced from the row of studs. Motor vehicle (10) comprising a front facade assembly (16), characterized in that the front facade assembly (16) conforms to one of claims 1 to 7, preferably the transverse panel (24) is au- above the screen (28). Motor vehicle (10) according to claim 8, characterized in that the motor vehicle (10) comprises a front flap (22) with a front edge (26) matching the transverse panel (24). Motor vehicle (10) according to one of claims 8 to 9, characterized in that the motor vehicle (10) comprises two light devices (20), the screen (28) being arranged between said two light devices (20), the transverse panel (24) extending transversely along the two light devices (20).