WO2024089334A1 - Motor vehicle front-end element with shared shock absorber - Google Patents

Motor vehicle front-end element with shared shock absorber Download PDF

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Publication number
WO2024089334A1
WO2024089334A1 PCT/FR2023/051548 FR2023051548W WO2024089334A1 WO 2024089334 A1 WO2024089334 A1 WO 2024089334A1 FR 2023051548 W FR2023051548 W FR 2023051548W WO 2024089334 A1 WO2024089334 A1 WO 2024089334A1
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WO
WIPO (PCT)
Prior art keywords
bumper
front face
shock absorber
face element
thickness
Prior art date
Application number
PCT/FR2023/051548
Other languages
French (fr)
Inventor
Rodolphe Peron
Julien BOUDAN
Original Assignee
Stellantis Auto Sas
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stellantis Auto Sas filed Critical Stellantis Auto Sas
Publication of WO2024089334A1 publication Critical patent/WO2024089334A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
    • B60R19/14—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement having folding parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1833—Structural beams therefor, e.g. shock-absorbing made of plastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/52—Radiator or grille guards ; Radiator grilles
    • B60R2019/525—Radiator grilles
    • B60R2019/527—Radiator grilles integral with bumpers

Definitions

  • TITLE FRONT ELEMENT OF A MOTOR VEHICLE WITH SHARED SHOCK ABSORBER
  • the present invention relates to the field of motor vehicles, more particularly the field of bumpers of motor vehicles.
  • the bumper is the part most often damaged in the event of an impact, and the cost of repairing it is not negligible, which is why the responses of a vehicle repairability tests are criteria increasingly taken into consideration by current automobile manufacturers.
  • motor vehicles include, at their front face, an absorber arranged to rest on a transverse beam, and which is conventionally separated from the bumper skin in order to allow the establishment of different materials between said absorber and the bumper (for example, made of expanded polypropylene and polyethylene, respectively), thus making it possible to absorb the kinetic energy of a light impact and to improve the response of vehicles to repairability tests.
  • an absorber arranged to rest on a transverse beam, and which is conventionally separated from the bumper skin in order to allow the establishment of different materials between said absorber and the bumper (for example, made of expanded polypropylene and polyethylene, respectively), thus making it possible to absorb the kinetic energy of a light impact and to improve the response of vehicles to repairability tests.
  • the published patent document FR 3 024 406 A1 discloses an air guide for the front of a motor vehicle comprising thin areas forming permanent deformation lines to prevent damage to the cooling system of the motor vehicle in the event of a frontal impact.
  • the present invention aims to overcome at least one of the disadvantages of the aforementioned state of the art. More particularly, the invention aims to propose a solution making it possible to effectively improve the response of motor vehicles to repairability tests, in a simple and economical manner.
  • the subject of the invention is a front face element of a motor vehicle, comprising:
  • shock absorber intended to be placed between the bumper and a bumper beam, formed in one piece with the lower grille; remarkable in that the shock absorber is connected to the lower grid by at least one transverse wall forming at least one bend and having a reduction in thickness forming a hinge, so as to allow the shock absorber to deform in compression without deforming the lower grille.
  • the front face element being made of injected plastic material.
  • the shock absorber forms a transverse box with staggered openings on the front and rear faces of said transverse box.
  • the transverse box has a rectangular section.
  • the transverse wall is connected to and projects from a middle portion of a lower face of the transverse box.
  • the transverse wall forms, from the shock absorber towards the lower grille, a first bend describing a quarter turn towards the front followed a second elbow describing a half-turn backwards, followed by a third elbow describing a quarter-turn downwards, when said front element is in the normal mounting position.
  • the reduction in thickness of the transverse wall is located between the at least one elbow and the lower grid.
  • the transverse wall has a nominal thickness of between 2 and 3 mm, and the reduction in thickness is between 0.5 and 1.5 mm.
  • the transverse wall has a thickness of between 1 and 2 mm when the thickness decreases.
  • the invention also relates to a motor vehicle comprising, at the front:
  • a front face element comprising a lower bumper grille housed in an opening in the bumper wall and a shock absorber disposed between the bumper beam and the bumper wall; remarkable in that the front face element is according to the invention.
  • the measures of the invention are advantageous in that the front element of a motor vehicle deforms in compression in order to absorb the energy, during a frontal impact at low speed, in an elastic manner without deformation and/or breakage of the lower grille of the bumper, thus guaranteeing a good response of the motor vehicle to shocks and repairability.
  • the element according to the invention allows it to be obtained from a single tool, which presents a considerable economic gain.
  • the front element being in one piece, saves time during assembly of the motor vehicle.
  • FIG 1 represents a perspective view of a front element of a motor vehicle, according to the invention
  • FIG 2 represents a perspective and sectional view along the axis AA of the front face element of Figure 1
  • FIG 3 represents a perspective and sectional view along the axis BB of the front face element of Figure 1;
  • FIG 4 represents a sectional view schematically illustrating the deformation of the element of Figure 1 due to a frontal impact during a repairability test.
  • Figure 1 represents a perspective view of a front face element 2 of a motor vehicle, according to the invention.
  • the front element 2 comprises an absorber 4 intended to be placed between a bumper 6 and a bumper beam (not shown here) extending transversely to the motor vehicle.
  • the bumper 6 may correspond to a bumper wall or skin, a grille or a grille reinforcement.
  • Element 2 also comprises a lower grid 8, the absorber 4 is connected to said lower grid 8 by at least one transverse wall 12, which will be detailed later in this description.
  • element 2 further comprises a lower bumper blade 10 extending transversely to the vehicle.
  • element 2 is formed in one piece with the lower grid 8. More preferably, element 2 is made of injected plastic material, said plastic preferably corresponds to TD10 polyethylene.
  • the absorber 4, the lower grid 8 and the lower blade 10 are in one piece.
  • element 2 can be obtained from a single tool, resulting in a considerable saving in manufacturing costs.
  • Figure 2 represents a perspective and sectional view along the axis A-A of the front face element 2 being in a normal mounting position on the motor vehicle 1.
  • the bumper beam 14 also designated by: “absorption system”, on which the absorber 4 is in direct contact.
  • the absorber comprises a rear face 4.1 contacting the beam 14, and a front face 4.2 contacting the bumper 6, particularly in the event of a frontal impact of the motor vehicle 1.
  • the absorber 4 comprises a lower face 4.3 and an upper face 4.4.
  • each of said faces 4.3 and 4.4 has a substantially triangular section so as to facilitate longitudinal crushing (along the X axis) in the event of an impact.
  • the transverse wall 12, connecting the absorber 4 to the grid 8, is connected to, and preferably projects from a middle portion of the lower face 4.3.
  • element 2 comprises a single transverse wall 12 extending transversely along a total transverse extent of the absorber 4.
  • element 2 can comprise a plurality of transverse walls 12, for example three walls 12 which can be separated transversely by apertures.
  • the transverse wall 12 forms, from the absorber 4 towards the lower grid 8, a first bend 12.1 describing a quarter turn towards the front followed by a second bend 12.2 describing a half turn towards the rear, followed by a third bend 12.3 describing a quarter turn downwards.
  • At least one of the elbows 12.1, 12.2, 12.3 has a reduction in thickness 13 forming a hinge between the absorber 4 and the lower grid 8. More preferably, the reduction in thickness 13 is arranged to the right of the third elbow 12.3, and has a thinned thickness compared to a nominal thickness of the transverse wall 12, the reduction in thickness 13 being between 1 and 2 mm, and preferably equal to 1.5 mm.
  • the nominal thickness of the transverse wall 12 is between 2 and 4 mm, preferably between 2 and 3 mm, and more preferably equal to 2.5 mm.
  • the reduction in thickness corresponds to at least 0.5 and at most 2.5 mm.
  • the transverse wall 12 is advantageously capable of deforming elastically in the event of compression in the longitudinal direction, without any rupture.
  • the reduction in thickness 13 provides more flexibility to the transverse wall 12 in order to allow a spring effect of said transverse wall 12 during its compression and thus avoid the rupture of the lower grid 8 and the absorber 4.
  • Figure 3 represents a perspective and sectional view along the axis B-B of the front face element 2 of Figure 1.
  • the absorber 4 forms a transverse box having a rectangular section and comprising apertures 5 arranged transversely in a staggered pattern on the front 4.2 and rear 4.1 faces of the absorber 4.
  • the compression of the absorber 4 is advantageously facilitated, thus in the event of a frontal impact, the transverse box of the absorber 4 is sufficiently flexible to compress elastically with a ruzement of the staggered faces 4.1 and 4.2.
  • the unmolding of element 2 can be easily carried out in a direction perpendicular to the faces 4.1, 4.2, and this, in part thanks to the absorber comprising the staggered openings 5.
  • Figure 4 represents a sectional view schematically illustrating the deformation of element 2 due to a frontal impact C during a repairability test.
  • Frontal impact C preferably corresponds to an “ECE 42” impact commonly referred to as: “parking shock”.
  • element 2 returns to its initial position after impact C.
  • the grid and the lower bumper blade remain intact, and the transverse wall 12 does not suffer any breakage.
  • the kinetic energy of the frontal impact C is completely absorbed by the absorber 4 and the transverse wall 12 of the front element 2.
  • the performance of the motor vehicle 1 in the repairability tests is improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Vibration Dampers (AREA)

Abstract

The present invention relates to a motor vehicle front-end element (2), comprising: a lower grille (8) of a bumper (6); a shock absorber (4) which is intended to be arranged between the bumper and a bumper beam and is formed integrally with the lower grille; characterised in that the shock absorber is connected to the lower grille by at least one transverse wall (12) forming at least one elbow and having a decrease in thickness forming a hinge, so as to allow the shock absorber to deform by compression without deforming the lower grille.

Description

DESCRIPTION DESCRIPTION
TITRE : ÉLÉMENT DE FACE AVANT DE VÉHICULE AUTOMOBILE AVEC ABSORBEUR DE CHOCS MUTUALISÉ TITLE: FRONT ELEMENT OF A MOTOR VEHICLE WITH SHARED SHOCK ABSORBER
Domaine technique Technical area
La présente invention revendique la priorité de la demande française 2211291 déposée le 28 octobre 2022, dont le contenu (texte, dessins et revendications) est ici incorporé par référence. The present invention claims priority from French application 2211291 filed on October 28, 2022, the content of which (text, drawings and claims) is herein incorporated by reference.
La présente invention concerne le domaine des véhicules automobiles, plus particulièrement le domaine des pare-chocs des véhicules automobiles. The present invention relates to the field of motor vehicles, more particularly the field of bumpers of motor vehicles.
Technique antérieure Prior art
Parmi les différents protocoles de tests auxquels les véhicules automobiles sont soumis, il existe l'essai réparabilité permettant d'estimer le coût des réparations sur un véhicule testé, notamment lorsqu'il percute un obstacle rigide à une vitesse faible, par exemple inférieure à 20 km/h, en général 16 km/h. Among the different test protocols to which motor vehicles are subjected, there is the repairability test making it possible to estimate the cost of repairs on a tested vehicle, in particular when it hits a rigid obstacle at a low speed, for example less than 20 km/h, generally 16 km/h.
En effet, le pare-chocs est l'organe le plus souvent endommagé en cas d'impact, et le coût d'une réparation de ce dernier n'est pas négligeable, c’est la raison pour laquelle les réponses d'un véhicule aux essais réparabilité sont des critères de plus en plus pris en considération par les constructeurs automobiles actuels. Indeed, the bumper is the part most often damaged in the event of an impact, and the cost of repairing it is not negligible, which is why the responses of a vehicle repairability tests are criteria increasingly taken into consideration by current automobile manufacturers.
A cet égard, les véhicules automobiles comportent, au niveau de leur face avant, un absorbeur disposé en appui sur une poutre transversale, et qui est de façon conventionnelle dissocié de la peau de pare-chocs afin de permettre l’établissement de matériaux différents entre ledit absorbeur et le pare-chocs (par exemple, en polypropylène expansé et en polyéthylène, respectivement), permettant ainsi d'absorber l'énergie cinétique d’un choc léger et d’améliorer la réponse des véhicules aux essais réparabilité. In this regard, motor vehicles include, at their front face, an absorber arranged to rest on a transverse beam, and which is conventionally separated from the bumper skin in order to allow the establishment of different materials between said absorber and the bumper (for example, made of expanded polypropylene and polyethylene, respectively), thus making it possible to absorb the kinetic energy of a light impact and to improve the response of vehicles to repairability tests.
Toutefois, une telle configuration est onéreuse car elle implique des procédés de fabrication différents et un nombre élevé d’opérations de montage sur les véhicules automobiles. However, such a configuration is expensive because it involves different manufacturing processes and a high number of assembly operations on motor vehicles.
Le document de brevet publié FR 3 024 406 A1 divulgue un guide d’air de face avant de véhicule automobile comprenant des zones de faibles épaisseur formant des lignes de déformation permanente permettant d’éviter l’endommagement du système de refroidissement du véhicule automobile en cas de choc frontal. The published patent document FR 3 024 406 A1 discloses an air guide for the front of a motor vehicle comprising thin areas forming permanent deformation lines to prevent damage to the cooling system of the motor vehicle in the event of a frontal impact.
Cependant, la solution du document reste économiquement contraignante et ne permet pas d’améliorer la réponse des véhicules automobiles lors d’un choc réparabilité, car les zones de faiblesse mécanique du guide d’air cassent, ce qui implique son remplacement complet. However, the solution in the document remains economically restrictive and does not make it possible to improve the response of motor vehicles during a reparability shock, because the areas of mechanical weakness of the air guide break, which implies its complete replacement.
Exposé de l'invention Presentation of the invention
La présente invention a pour objectif de pallier au moins un des inconvénients de l’état de la technique susmentionné. Plus particulièrement, l’invention a pour objectif de proposer une solution permettant d’améliorer efficacement la réponse des véhicules automobiles aux essais réparabilité, de manière simple et économique.The present invention aims to overcome at least one of the disadvantages of the aforementioned state of the art. More particularly, the invention aims to propose a solution making it possible to effectively improve the response of motor vehicles to repairability tests, in a simple and economical manner.
À cet effet, l’invention a pour objet un élément de face avant de véhicule automobile, comprenant : To this end, the subject of the invention is a front face element of a motor vehicle, comprising:
- une grille inférieure de pare-chocs ; - a lower bumper grille;
- un absorbeur de chocs destiné à être disposé entre le pare-chocs et une poutre de pare-chocs, formé d’un seul tenant avec la grille inférieure ; remarquable en ce que l’absorbeur de chocs est relié à la grille inférieure par au moins une paroi transversale formant au moins un coude et présentant une diminution d’épaisseur formant charnière, de manière à permettre à l’absorbeur de chocs de se déformer en compression sans déformer la grille inférieure. - a shock absorber intended to be placed between the bumper and a bumper beam, formed in one piece with the lower grille; remarkable in that the shock absorber is connected to the lower grid by at least one transverse wall forming at least one bend and having a reduction in thickness forming a hinge, so as to allow the shock absorber to deform in compression without deforming the lower grille.
Selon un mode de réalisation, l’élément de face avant étant réalisé en matériau plastique injecté. According to one embodiment, the front face element being made of injected plastic material.
Selon un mode de réalisation, l’absorbeur de chocs forme un caisson transversal avec des ajours en quinconce sur des faces avant et arrière dudit caisson transversal. According to one embodiment, the shock absorber forms a transverse box with staggered openings on the front and rear faces of said transverse box.
Selon un mode de réalisation, le caisson transversal présente une section rectangulaire. According to one embodiment, the transverse box has a rectangular section.
Selon un mode de réalisation, la paroi transversale est raccordée à, et en saillie d’une portion médiane d’une face inférieure du caisson transversal. According to one embodiment, the transverse wall is connected to and projects from a middle portion of a lower face of the transverse box.
Selon un mode de réalisation, la paroi transversale forme, de l’absorbeur de chocs vers la grille inférieure, un premier coude décrivant un quart de tour vers l’avant suivi d’un deuxième coude décrivant un demi-tour vers l’arrière, suivi d’un troisième coude décrivant un quart de tour vers le bas, lorsque ledit élément de face avant est en position normale de montage. According to one embodiment, the transverse wall forms, from the shock absorber towards the lower grille, a first bend describing a quarter turn towards the front followed a second elbow describing a half-turn backwards, followed by a third elbow describing a quarter-turn downwards, when said front element is in the normal mounting position.
Selon un mode de réalisation, la diminution d’épaisseur de la paroi transversale est située entre l’au moins un coude et la grille inférieure. According to one embodiment, the reduction in thickness of the transverse wall is located between the at least one elbow and the lower grid.
Selon un mode de réalisation, la paroi transversale présente une épaisseur nominale comprise entre 2 et 3 mm, et la diminution d’épaisseur est comprise entre 0,5 et 1 ,5 mm. According to one embodiment, the transverse wall has a nominal thickness of between 2 and 3 mm, and the reduction in thickness is between 0.5 and 1.5 mm.
Selon un mode de réalisation, la paroi transversale présente une épaisseur à la diminution d’épaisseur comprise entre 1 et 2 mm. According to one embodiment, the transverse wall has a thickness of between 1 and 2 mm when the thickness decreases.
L’invention concerne également un véhicule automobile comprenant, à l’avant :The invention also relates to a motor vehicle comprising, at the front:
- une poutre de pare-chocs ; - a bumper beam;
- une paroi de pare-chocs ; - a bumper wall;
- un élément de face avant comprenant une grille inférieure de pare-chocs logée dans un ajour de la paroi de pare-chocs et un absorbeur de chocs disposé entre la poutre de pare-chocs et la paroi de pare-chocs ; remarquable en ce que l’élément de face avant est selon l’invention. - a front face element comprising a lower bumper grille housed in an opening in the bumper wall and a shock absorber disposed between the bumper beam and the bumper wall; remarkable in that the front face element is according to the invention.
Les mesures de l’invention sont avantageuses en ce que l’élément de face avant de véhicule automobile se déforme en compression afin d’absorber l’énergie, lors d’un choc frontal à faible vitesse, de manière élastique sans déformation et/ou casse de la grille inférieure du pare-chocs, garantissant ainsi une bonne réponse du véhicule automobile aux chocs réparabilité. The measures of the invention are advantageous in that the front element of a motor vehicle deforms in compression in order to absorb the energy, during a frontal impact at low speed, in an elastic manner without deformation and/or breakage of the lower grille of the bumper, thus guaranteeing a good response of the motor vehicle to shocks and repairability.
De plus, l’élément selon l’invention permet son obtention à partir d’un seul outillage, ce qui présente un gain économique considérable. Parallèlement, l’élément de face avant, étant monobloc, permet d’assurer un gain de temps lors du montage du véhicule automobile. In addition, the element according to the invention allows it to be obtained from a single tool, which presents a considerable economic gain. At the same time, the front element, being in one piece, saves time during assembly of the motor vehicle.
Brève description des dessins Brief description of the drawings
[Fig 1] représente une vue en perspective d’un élément de face avant de véhicule automobile, selon l’invention ; [Fig 1] represents a perspective view of a front element of a motor vehicle, according to the invention;
[Fig 2] représente une vue en perspective et en coupe selon l’axe A-A de l’élément de face avant de la figure 1 ; [Fig 3] représente une vue en perspective et en coupe selon l’axe B-B de l’élément de face avant de la figure 1 ; [Fig 2] represents a perspective and sectional view along the axis AA of the front face element of Figure 1; [Fig 3] represents a perspective and sectional view along the axis BB of the front face element of Figure 1;
[Fig 4] représente une vue en coupe illustrant de manière schématique la déformation de l’élément de la figure 1 due à un choc frontal lors d’un essai réparabilité. [Fig 4] represents a sectional view schematically illustrating the deformation of the element of Figure 1 due to a frontal impact during a repairability test.
Description détaillée detailed description
La figure 1 représente une vue en perspective d’un élément 2 de face avant de véhicule automobile, selon l’invention. Figure 1 represents a perspective view of a front face element 2 of a motor vehicle, according to the invention.
L’élément 2 de face avant, comprend un absorbeur 4 destiné à être disposé entre un pare-chocs 6 et une poutre de pare-chocs (non représentée ici) s’étendant transversalement au véhicule automobile. The front element 2 comprises an absorber 4 intended to be placed between a bumper 6 and a bumper beam (not shown here) extending transversely to the motor vehicle.
Le pare-chocs 6 peut correspondre à une paroi ou une peau de pare-chocs, à une calandre ou à un renfort de calandre. The bumper 6 may correspond to a bumper wall or skin, a grille or a grille reinforcement.
L’élément 2 comprend également une grille inférieure 8, l’absorbeur 4 est relié à ladite grille inférieure 8 par au moins une paroi transversale 12, qui sera détaillée plus loin dans la présente description. Element 2 also comprises a lower grid 8, the absorber 4 is connected to said lower grid 8 by at least one transverse wall 12, which will be detailed later in this description.
Préférentiellement, l’élément 2 comprend, en outre, une lame inférieure 10 de pare- chocs s’étendant transversalement au véhicule. Preferably, element 2 further comprises a lower bumper blade 10 extending transversely to the vehicle.
Avantageusement, l’élément 2 est formé d’un seul tenant avec la grille inférieure 8. Plus préférentiellement, l’élément 2 est réalisé en matériau plastique injecté, ledit plastique correspond, de préférence, à du polyéthylène TD10. Advantageously, element 2 is formed in one piece with the lower grid 8. More preferably, element 2 is made of injected plastic material, said plastic preferably corresponds to TD10 polyethylene.
Dans cette configuration, l’absorbeur 4, la grille inférieure 8 et la lame inférieure 10, sont monobloc. Ainsi, l’élément 2 peut être obtenu à partir d’un seul outillage, résultant en une économie considérable des coûts de fabrication. In this configuration, the absorber 4, the lower grid 8 and the lower blade 10 are in one piece. Thus, element 2 can be obtained from a single tool, resulting in a considerable saving in manufacturing costs.
La figure 2 représente une vue en perspective et en coupe selon l’axe A-A de l’élément 2 de face avant étant dans une position normale de montage sur le véhicule automobile 1 . Figure 2 represents a perspective and sectional view along the axis A-A of the front face element 2 being in a normal mounting position on the motor vehicle 1.
On peut voir la poutre 14 de pare-chocs, également désignée par : « système d’absorption », sur laquelle l’absorbeur 4 est en contact direct. En effet, l’absorbeur comprend une face arrière 4.1 contactant la poutre 14, et une face avant 4.2 contactant le pare-chocs 6, notamment en cas de choc frontal du véhicule automobile 1 . We can see the bumper beam 14, also designated by: “absorption system”, on which the absorber 4 is in direct contact. Indeed, the absorber comprises a rear face 4.1 contacting the beam 14, and a front face 4.2 contacting the bumper 6, particularly in the event of a frontal impact of the motor vehicle 1.
L’absorbeur 4 comprend une face inférieure 4.3 et une face supérieure 4.4. Préférentiellement, chacune desdites faces 4.3 et 4.4 présente une section sensiblement en triangle de manière à faciliter un écrasement longitudinal (suivant l’axe X) en cas de choc. The absorber 4 comprises a lower face 4.3 and an upper face 4.4. Preferably, each of said faces 4.3 and 4.4 has a substantially triangular section so as to facilitate longitudinal crushing (along the X axis) in the event of an impact.
La paroi transversale 12, reliant l’absorbeur 4 à la grille 8, est raccordée à, et de préférence en saillie d’une portion médiane de la face inférieure 4.3. The transverse wall 12, connecting the absorber 4 to the grid 8, is connected to, and preferably projects from a middle portion of the lower face 4.3.
Préférentiellement, l’élément 2 comprend une seule paroi transversale 12 s’étendent transversalement suivant une étendue transversale totale de l’absorbeur 4. Preferably, element 2 comprises a single transverse wall 12 extending transversely along a total transverse extent of the absorber 4.
Alternativement, l’élément 2 peut comprendre une pluralité de parois transversales 12, par exemple trois parois 12 pouvant être séparées transversalement par des ajours. Alternatively, element 2 can comprise a plurality of transverse walls 12, for example three walls 12 which can be separated transversely by apertures.
De préférence, la paroi transversale 12 forme, de l’absorbeur 4 vers la grille inférieure 8, un premier coude 12.1 décrivant un quart de tour vers l’avant suivi d’un deuxième coude 12.2 décrivant un demi-tour vers l’arrière, suivi d’un troisième coude 12.3 décrivant un quart de tour vers le bas. Preferably, the transverse wall 12 forms, from the absorber 4 towards the lower grid 8, a first bend 12.1 describing a quarter turn towards the front followed by a second bend 12.2 describing a half turn towards the rear, followed by a third bend 12.3 describing a quarter turn downwards.
Préférentiellement, au moins un des coudes 12.1 , 12.2, 12.3 présente une diminution d’épaisseur 13 formant charnière entre l’absorbeur 4 et la grille inférieure 8. Plus préférentiellement, la diminution d’épaisseur 13 est disposée au droit du troisième coude 12.3, et présente une épaisseur amincie par rapport à une épaisseur nominale de la paroi transversale 12, la diminution d’épaisseur 13 étant comprise entre 1 et 2 mm, et préférentiellement égale à 1 ,5 mm. Preferably, at least one of the elbows 12.1, 12.2, 12.3 has a reduction in thickness 13 forming a hinge between the absorber 4 and the lower grid 8. More preferably, the reduction in thickness 13 is arranged to the right of the third elbow 12.3, and has a thinned thickness compared to a nominal thickness of the transverse wall 12, the reduction in thickness 13 being between 1 and 2 mm, and preferably equal to 1.5 mm.
A cet égard, l’épaisseur nominale de la paroi transversale 12 est comprise entre 2 et 4 mm, préférentiellement entre 2 et 3 mm, et plus préférentiellement égale à 2,5 mm. Ainsi, la diminution d’épaisseur correspond à au moins 0,5 et à au plus 2,5 mm.In this regard, the nominal thickness of the transverse wall 12 is between 2 and 4 mm, preferably between 2 and 3 mm, and more preferably equal to 2.5 mm. Thus, the reduction in thickness corresponds to at least 0.5 and at most 2.5 mm.
Dans cette configuration, la paroi transversale 12 est avantageusement apte à se déformer élastiquement en cas de compression suivant la direction longitudinale, et cela, sans aucune rupture. In this configuration, the transverse wall 12 is advantageously capable of deforming elastically in the event of compression in the longitudinal direction, without any rupture.
Avantageusement, la diminution d’épaisseur 13 procure davantage de souplesse à la paroi transversale 12 afin de permettre un effet ressort de ladite paroi transversale 12 lors de sa compression et ainsi d’éviter la rupture de la grille inférieure 8 et I’absorbeur 4. Advantageously, the reduction in thickness 13 provides more flexibility to the transverse wall 12 in order to allow a spring effect of said transverse wall 12 during its compression and thus avoid the rupture of the lower grid 8 and the absorber 4.
La figure 3 représente une vue en perspective et en coupe selon l’axe B-B de l’élément 2 de face avant de la figure 1 . Figure 3 represents a perspective and sectional view along the axis B-B of the front face element 2 of Figure 1.
On peut voir que l’absorbeur 4 forme un caisson transversal ayant une section rectangulaire et comprenant des ajours 5 disposés transversalement en quinconce sur les faces avant 4.2 et arrière 4.1 de l’absorbeur 4. It can be seen that the absorber 4 forms a transverse box having a rectangular section and comprising apertures 5 arranged transversely in a staggered pattern on the front 4.2 and rear 4.1 faces of the absorber 4.
Dans cette configuration, la compression de l’absorbeur 4 est avantageusement facilitée, ainsi en cas de choc frontal, le caisson transversal de l’absorbeur 4 est suffisamment souple pour se comprimer élastiquement avec un rapprochement des faces en quinconce 4.1 et 4.2. In this configuration, the compression of the absorber 4 is advantageously facilitated, thus in the event of a frontal impact, the transverse box of the absorber 4 is sufficiently flexible to compress elastically with a rapprochement of the staggered faces 4.1 and 4.2.
De façon avantageuse, le démoulage de l’élément 2 peut être réalisé facilement suivant une direction perpendiculaire aux faces 4.1 , 4.2, et cela, en partie grâce à l’absorbeur comprenant les ajours 5 en quinconce. Advantageously, the unmolding of element 2 can be easily carried out in a direction perpendicular to the faces 4.1, 4.2, and this, in part thanks to the absorber comprising the staggered openings 5.
La figure 4 représente une vue en coupe illustrant de manière schématique la déformation de l’élément 2 due à un choc frontal C lors d’un essai réparabilité. Figure 4 represents a sectional view schematically illustrating the deformation of element 2 due to a frontal impact C during a repairability test.
Le choc frontal C correspond préférentiellement à un choc « ECE 42 » communément désigné par : « choc parking ». Frontal impact C preferably corresponds to an “ECE 42” impact commonly referred to as: “parking shock”.
Suite au choc frontal C, on peut voir l’absorbeur 2’ illustré en pointillés à l’état comprimé, celui-ci présente une paroi transversale 12’ longitudinalement allongée et un absorbeur 4’ écrasé contre la poutre 14. Un tel écrasement correspond à une déformation élastique procurée au moins en partie par la diminution d’épaisseur 13 formant charnière entre l’absorbeur 4 et la partie inférieure de l’élément 2. Following the frontal impact C, we can see the absorber 2' illustrated in dotted lines in the compressed state, this has a longitudinally elongated transverse wall 12' and an absorber 4' crushed against the beam 14. Such crushing corresponds to an elastic deformation provided at least in part by the reduction in thickness 13 forming a hinge between the absorber 4 and the lower part of the element 2.
Ainsi, l’élément 2 revient à sa position initiale après le choc C. Dans cette configuration, la grille et la lame inférieure de pare-chocs restent intactes, et la paroi transversale 12 ne subit aucune rupture. Thus, element 2 returns to its initial position after impact C. In this configuration, the grid and the lower bumper blade remain intact, and the transverse wall 12 does not suffer any breakage.
Avantageusement, l’énergie cinétique du choc frontal C est totalement absorbée par l’absorbeur 4 et la paroi transversale 12 de l’élément 2 de face avant. Ainsi, les performances du véhicule automobile 1 aux essais réparabilité sont améliorées. Advantageously, the kinetic energy of the frontal impact C is completely absorbed by the absorber 4 and the transverse wall 12 of the front element 2. Thus, the performance of the motor vehicle 1 in the repairability tests is improved.

Claims

REVENDICATIONS
[Revendication 1 ] Elément (2) de face avant de véhicule automobile (1 ), comprenant : [Claim 1] Front element (2) of a motor vehicle (1), comprising:
- une grille (8) inférieure de pare-chocs (6) ; - a lower bumper grille (8) (6);
- un absorbeur (4) de chocs destiné à être disposé entre le pare-chocs (6) et une poutre (14) de pare-chocs (6), formé d’un seul tenant avec la grille (8) inférieure ; caractérisé en ce que l’absorbeur (4) de chocs est relié à la grille (8) inférieure par au moins une paroi transversale (12) formant au moins un coude (12.1 , 12.2, 12.3) et présentant une diminution d’épaisseur (13) formant charnière, de manière à permettre à l’absorbeur (4) de chocs de se déformer en compression sans déformer la grille (8) inférieure. - a shock absorber (4) intended to be placed between the bumper (6) and a beam (14) of the bumper (6), formed in one piece with the lower grille (8); characterized in that the shock absorber (4) is connected to the lower grid (8) by at least one transverse wall (12) forming at least one bend (12.1, 12.2, 12.3) and having a reduction in thickness ( 13) forming a hinge, so as to allow the shock absorber (4) to deform in compression without deforming the lower grid (8).
[Revendication 2 ] Elément (2) de face avant selon la revendication 1 , dans lequel ledit élément (2) de face avant étant réalisé en matériau plastique injecté. [Claim 2] Front face element (2) according to claim 1, wherein said front face element (2) being made of injected plastic material.
[Revendication 3 ] Elément (2) de face avant selon l’une des revendications 1 et 2, dans lequel l’absorbeur (4) de chocs forme un caisson transversal avec des ajours (5) en quinconce sur des faces avant (4.2) et arrière (4.1 ) dudit caisson transversal. [Claim 3] Front face element (2) according to one of claims 1 and 2, in which the shock absorber (4) forms a transverse box with staggered openings (5) on the front faces (4.2) and rear (4.1) of said transverse box.
[Revendication 4 ] Elément (2) de face avant selon la revendication 3, dans lequel le caisson transversal présente une section rectangulaire. [Claim 4] Front face element (2) according to claim 3, in which the transverse box has a rectangular section.
[Revendication 5 ] Elément (2) de face avant selon l’une des revendications 3 et 4, dans lequel la paroi transversale (12) est raccordée à, et en saillie d’une portion médiane d’une face inférieure (4.3) du caisson transversal.[Claim 5] Front face element (2) according to one of claims 3 and 4, in which the transverse wall (12) is connected to, and projects from a middle portion of a lower face (4.3) of the transverse box.
[Revendication 6 ] Elément (2) de face avant selon l’une des revendications 1 à 5, dans lequel la paroi transversale (12) forme, de l’absorbeur (4) de chocs vers la grille (8) inférieure, un premier coude (12.1 ) décrivant un quart de tour vers l’avant suivi d’un deuxième coude (12.2) décrivant un demi-tour vers l’arrière, suivi d’un troisième coude (12.3) décrivant un quart de tour vers le bas, lorsque ledit élément (2) de face avant est en position normale de montage. [Claim 6] Front face element (2) according to one of claims 1 to 5, in which the transverse wall (12) forms, from the shock absorber (4) towards the lower grille (8), a first elbow (12.1) describing a quarter turn forward followed by a second elbow (12.2) describing a half turn backwards, followed by a third elbow (12.3) describing a quarter turn downwards, when said front element (2) is in the normal mounting position.
[Revendication 7 ] Elément (2) de face avant selon l’une des revendications 1 à 6, dans lequel la diminution d’épaisseur (13) de la paroi transversale (12) est située entre l’au moins un coude (12.1 , 12.2, 12.3) et la grille (8) inférieure. [Claim 7] Front face element (2) according to one of claims 1 to 6, in which the reduction in thickness (13) of the transverse wall (12) is located between the at least one elbow (12.1, 12.2, 12.3) and the lower grid (8).
[Revendication 8 ] Elément (2) de face avant selon l’une des revendications 1 à 7, dans lequel la paroi transversale (12) présente une épaisseur nominale comprise entre 2 et 3 mm, et la diminution d’épaisseur (13) est comprise entre 0,5 et 1 ,5 mm. [Claim 8] Front face element (2) according to one of claims 1 to 7, in which the transverse wall (12) has a nominal thickness of between 2 and 3 mm, and the reduction in thickness (13) is between 0.5 and 1.5 mm.
[Revendication 9 ] Elément (2) de face avant selon l’une des revendications 1 à 8, dans lequel la paroi transversale (12) présente une épaisseur à la diminution d’épaisseur (13) comprise entre 1 et 2 mm. [Claim 9] Front face element (2) according to one of claims 1 to 8, in which the transverse wall (12) has a thickness at the reduction of thickness (13) of between 1 and 2 mm.
[Revendication 10 ] Véhicule automobile (1) comprenant, à l’avant : [Claim 10] Motor vehicle (1) comprising, at the front:
- une poutre (14) de pare-chocs ; - a bumper beam (14);
- une paroi (6) de pare-chocs ; - a bumper wall (6);
- un élément (2) de face avant comprenant une grille (8) inférieure de pare- chocs logée dans un ajour de la paroi (6) de pare-chocs et un absorbeur (4) de chocs disposé entre la poutre (14) de pare-chocs et la paroi (6) de pare- chocs ; caractérisé en ce que l’élément (2) de face avant est selon l’une des revendications 1 à 9. - a front face element (2) comprising a lower bumper grille (8) housed in an opening in the bumper wall (6) and a shock absorber (4) disposed between the beam (14) of bumper and the bumper wall (6); characterized in that the front face element (2) is according to one of claims 1 to 9.
PCT/FR2023/051548 2022-10-28 2023-10-05 Motor vehicle front-end element with shared shock absorber WO2024089334A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2211291A FR3141410A1 (en) 2022-10-28 2022-10-28 FRONT ELEMENT OF A MOTOR VEHICLE WITH SHARED SHOCK ABSORBER
FRFR2211291 2022-10-28

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Publication Number Publication Date
WO2024089334A1 true WO2024089334A1 (en) 2024-05-02

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211291A1 (en) 1972-12-04 1974-07-19 Jetzer Eng Ag
EP1067039A1 (en) * 1999-07-06 2001-01-10 Compagnie Plastic Omnium Front structure of a motor vehicle
DE10260387A1 (en) * 2002-12-21 2004-07-01 Volkswagen Ag Shock absorber unit for a vehicle, in particular, a motor vehicle comprises an insert which is located between the carrier beam and the cover of the unit, and incorporates cup-like deformation elements
US20070069535A1 (en) * 2005-09-27 2007-03-29 General Electric Company Bumper system with integrated energy absorber underbar
FR2911559A1 (en) * 2007-01-23 2008-07-25 Plastic Omnium Cie Impact e.g. insurance impact, absorbing module for motor vehicle, has lower convergent extended from lower element to radiator, case guiding air towards radiator, and lower element or leg supported against lower part of vehicle
FR3024406A1 (en) 2014-08-01 2016-02-05 Plastic Omnium Cie AIR GUIDE FOR FRONT PANEL OF MOTOR VEHICLE COMPRISING ZONES OF WEAKNESS MECHANICAL

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211291A1 (en) 1972-12-04 1974-07-19 Jetzer Eng Ag
EP1067039A1 (en) * 1999-07-06 2001-01-10 Compagnie Plastic Omnium Front structure of a motor vehicle
DE10260387A1 (en) * 2002-12-21 2004-07-01 Volkswagen Ag Shock absorber unit for a vehicle, in particular, a motor vehicle comprises an insert which is located between the carrier beam and the cover of the unit, and incorporates cup-like deformation elements
US20070069535A1 (en) * 2005-09-27 2007-03-29 General Electric Company Bumper system with integrated energy absorber underbar
FR2911559A1 (en) * 2007-01-23 2008-07-25 Plastic Omnium Cie Impact e.g. insurance impact, absorbing module for motor vehicle, has lower convergent extended from lower element to radiator, case guiding air towards radiator, and lower element or leg supported against lower part of vehicle
FR3024406A1 (en) 2014-08-01 2016-02-05 Plastic Omnium Cie AIR GUIDE FOR FRONT PANEL OF MOTOR VEHICLE COMPRISING ZONES OF WEAKNESS MECHANICAL

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