WO2009053199A1 - Motor vehicle front end - Google Patents

Motor vehicle front end Download PDF

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Publication number
WO2009053199A1
WO2009053199A1 PCT/EP2008/062768 EP2008062768W WO2009053199A1 WO 2009053199 A1 WO2009053199 A1 WO 2009053199A1 EP 2008062768 W EP2008062768 W EP 2008062768W WO 2009053199 A1 WO2009053199 A1 WO 2009053199A1
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WO
WIPO (PCT)
Prior art keywords
front face
cross member
face according
armature
central portion
Prior art date
Application number
PCT/EP2008/062768
Other languages
French (fr)
Inventor
Laurence Marechal
Emmanuelle Guillaume
Original Assignee
Valeo Systemes Thermiques
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 Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2009053199A1 publication Critical patent/WO2009053199A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/082—Engine compartments
    • B62D25/084—Radiator supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material

Definitions

  • the invention relates to a front face for a motor vehicle comprising at least one armature capable of receiving equipment,
  • a front face is a structural element capable of integrating various equipment of the vehicle, such as projectors, turn signals, buzzer, heat exchanger, fan motor unit or complete cooling module, lock bracket etc.
  • the front panel thus equipped with its equipment, is a unitary element prepared and delivered by the equipment manufacturer, ready to be mounted on the vehicle by the manufacturer.
  • the mounting of this unitary module is, for example, by connecting to lateral structural elements of the vehicle, such as longitudinal members, wings or hulls.
  • front faces comprising a frame made entirely of steel.
  • Such a front face has a weight that can reach more than 10 kg.
  • Hybrid material means a material comprising a metal on which is molded plastic. In such a hybrid material, the attachment of the plastic to the metal can be performed by cuts provided in the metal.
  • the invention aims to improve the situation.
  • the invention provides a front face as described above wherein at least a portion of the frame is made of said sandwich material.
  • the sandwich material is composed of a core of a first material which is covered on each of its faces with a skin in at least a second material.
  • Such a front face is lighter than the front faces of the prior art.
  • the use of the sandwich material makes it possible to obtain a front face which, while weighing less weight than the front faces of the prior art, has a behavior in terms of rigidity compatible with the requirements of the manufacturers.
  • Figure 1 shows a front face according to the prior art.
  • Figure 2 schematically shows a so-called sandwich material which is used in a front face according to the invention.
  • Figure 3 shows a front face according to an embodiment of the invention.
  • FIG. 4 represents a graph comparing the stiffness values with the so-called “lock” pulling of a crossmember superior / weight, on a base 100, of the assembly "upper cross-jambs" of a front face according to the invention and front faces according to the prior art.
  • FIG. 5 represents a graph comparing the torsional stiffness values of a front face / weight, on a base 100, of the "upper cross-jambs" assembly of a front face according to the invention and front faces according to FIG. prior art.
  • FIG. 1 represents a front face 10 as known according to the prior art.
  • the front face 10 comprises a frame 20 adapted to receive equipment of the motor vehicle such as projectors or heat exchangers (not shown).
  • the frame 20 of the front face 10 is made entirely of steel. •
  • the armature 20 has a cross member 22 said upper and is substantially horizontal.
  • the upper cross member 22 has two so-called lateral ends 24-A and 24-B and a central portion 26.
  • the side portions can be viewed as arms extending substantially horizontally and laterally.
  • the central portion 26 is in turn adapted to receive a lock support 28.
  • the lock support 28 is fixed to the upper cross member 22.
  • the upper cross member 22 and the lock bracket 28 are made of steel and has a thickness of about 1 mm.
  • the armature 20 further comprises two legs 30-A and 30-B.
  • the two legs 30-A and 30-B are substantially vertical and arranged respectively on the right side and the left side of the vehicle. These two jambs are still called “amounts” or "quarters”.
  • the legs 30-A and 30-B are connected by their ends said upper to the upper cross member 22.
  • the legs 30-A and 30-B are joined together by the crosspiece 22 disposed between their upper ends.
  • the legs are also made of steel.
  • the armature 20 further comprises a lower cross member 32.
  • the lower cross member 32 is fixed to the legs 30A and 30-B by their ends said lower.
  • the lower cross member 32 extends substantially horizontally and is parallel to the upper cross member 22.
  • the lower rail 32 is also made of steel.
  • the lower cross member 32 is reinforced by a so-called reinforcing plate (not shown) which is made of steel.
  • the armature 20 of the front face further comprises a beam 34.
  • the beam 34 is supported by the legs 30-A and 30-B.
  • the beam 34 extending substantially horizontally and parallel to the upper cross member 22 and the lower cross member 32.
  • the beam 34 is made of steel.
  • a front face 100 according to the invention comprises a frame 120.
  • the armature 120 of the front face 100 is here made of several parts. In other words, the front face 100 has several sections or pieces that are assembled with each other to form the frame 120.
  • At least one of said parts of the frame 120 is made of said sandwich material.
  • the armature 120 is made of sandwich material and not all of the latter.
  • sandwich material is shown, schematically, in FIG. 2.
  • sandwich material is meant a material composed of a core 200 made of a first material which is covered on each of its outer faces 210 and 220 with a skin in at least one second material.
  • the sandwich material is composed of a thickness of material 200 interposed between two so-called outer sheets 210 and 220.
  • the core 200 is composed of a polymer, for example a plastic, whose thickness is between 0.2 and 1.5 mm.
  • the skins 210 and 220 are, for their part, both made of metal sheet. Here, it is steel, for example, covered with a layer of zinc. The thickness of the skins 210 and 220 is, in this embodiment, 0.25 mm. However, it is possible to envisage other reagents than steel, such as, for example, aluminum. Such a sandwich material is in particular described in patent applications EP 1 651 432 or EP 1 636 024.
  • the armature 120 of the front face 100 comprises at least one cross member 122 said upper.
  • the cross member 122 has at least one portion made of sandwich material.
  • the cross member 122 is here made in three parts.
  • the upper cross member 122 has two so-called lateral ends 124-A and 124-B and a central portion 126.
  • the term lateral ends, the ends of the upper rail which are able to support at least part of the projectors.
  • the central portion 126 is, in turn, made of steel.
  • the side portions 124-A and 124-B have a thickness of 2mm.
  • the central portion 126 has a thickness of between 0.5 and 1.5 mm, preferably 1 mm.
  • Another embodiment not shown proposes that all of the upper cross member is made in the sandwich material.
  • the lateral ends 124-A and 124-B are connected to the central portion
  • the frame 120 of the front face further comprises at least two legs 130-A and 130-B.
  • the jambs 130-A and 130-B are connected by their so-called upper ends to the upper cross member 122.
  • the legs 130-A and 130-B are, in this example, made of sandwich material. They have a thickness of 2 mm.
  • Two arms 134-A and 134-B extend laterally, respectively substantially horizontally, from each leg 130-A and 130-B outwardly.
  • the arm 134-A (134-B), the leg 130-A (130-B) and the lateral portion 134-A (134-B) of the upper rail 122 define a housing for receiving in particular a lighthouse optics ⁇ not shown ⁇ .
  • the armature 120 also includes a lower cross member 132 which is fixed to the legs 130-A and 130-B by their so-called lower ends.
  • the bottom rail 132 extends substantially horizontally and parallel to the upper rail 122.
  • the armature 120 is provided with at least one lock support 128.
  • the lock support 128 is fixed at least to the upper cross member 122.
  • the Lock support 128 is more precisely fixed on the central portion 126 of the upper cross member 122.
  • Said central portion 126 is, in particular provided steel and has a length that is at least equal to the portion of the lock support for fixing the support 128 on the upper rail.
  • the lock support is also connected to the bottom rail 132.
  • the lock support is made of steel and has, for example, a thickness of 1.3 mm.
  • An embodiment not shown proposes to provide the frame with a steel beam as the beam 34 described above.
  • the armature 120 of the front face 100 comprises several parts secured to each other and at least one part of the armature 120 is made of sandwich material while the rest of the armature is made of another material, for example metal, in particular steel.
  • the Applicant has determined the ratio between the stiffness in the tear, 60 0 C, the area of the upper cross member accommodating the lock carrier and the weight on a basis
  • a front face of a constant bulk and said assembly "crosses upper-jambs” is made of different materials.
  • the tested front face always comprises the same reinforcement comprising lower and upper cross members, two jambs, a lock support and a beam.
  • These different elements of the frame are all identical in terms of shape and size between the different faces before tested.
  • the only variant of this test is the type and thickness of the material used for the manufacture of the legs and the upper rail.
  • the Applicant has compared the results obtained with a front made entirely of steel, a front having jambs and an upper cross member made of sandwich material and a front having legs and an upper cross member made of hybrid material.
  • the front face comprising at least a portion of its sandwich material frame is the one that obtains the most interesting results.
  • a front face comprising at least a portion sandwiched material, more particularly the parts mentioned above, is a front face having a lower weight to the front faces of the same stiffness but performed in different technologies.
  • the Applicant has determined the ratio of the torsional stiffness of a front face, at 60 0 C, and the weight on a base 100, a set "through upper-jambs' of the different front faces as already described for the previous test.
  • the front faces tested always include the same frame having lower and upper cross members, two jambs, a lock bracket and a beam. These different elements of the frame are all identical in terms of shape and size between the different faces before tested.
  • the only variant of this test is the type and thickness of the material used to manufacture the jambs and the top rail.
  • the Applicant has thus compared the results obtained with a front made entirely of steel, a front having jambs and an upper cross member made of sandwich material and a front having jambs and an upper cross member made of hybrid material.
  • a front face comprising at least one part made of sandwich material, more particularly the parts mentioned above, is a front face presenting a weight lower than the front faces of the same stiffness but realized in different technologies.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Support Devices For Sliding Doors (AREA)

Abstract

The invention relates to a motor vehicle front end (100) comprising a frame (120) which is capable of accommodating equipment. At least part of the frame (120) is made of sandwich material. The sandwich material is composed of a core made of a first material, said core being covered on each of its faces by a skin made of at least one second material. The invention can be applied particularly in the automotive sector.

Description

Face avant pour véhicule automobile Front side for a motor vehicle
L'invention concerne une face avant pour véhicule automobile comportant au moins une armature propre à recevoir des équipements ,The invention relates to a front face for a motor vehicle comprising at least one armature capable of receiving equipment,
Une face avant est un élément de structure susceptible d'intégrer divers équipements du véhicule, tels que projecteurs, clignotants, avertisseur sonore, échangeur thermique, groupe moto-ventilateur ou module de refroidissement complet, support serrure etc.A front face is a structural element capable of integrating various equipment of the vehicle, such as projectors, turn signals, buzzer, heat exchanger, fan motor unit or complete cooling module, lock bracket etc.
La face avant, ainsi pourvu de ses équipements, constitue un élément unitaire préparé et livré par l'équipementier, prêt à être monté sur le véhicule par le constructeur. Le montage de ce module unitaire se fait, par exemple, par raccordement à des éléments de structure latéraux du véhicule, tels que les longerons, ailes ou coques.The front panel, thus equipped with its equipment, is a unitary element prepared and delivered by the equipment manufacturer, ready to be mounted on the vehicle by the manufacturer. The mounting of this unitary module is, for example, by connecting to lateral structural elements of the vehicle, such as longitudinal members, wings or hulls.
On connaît ainsi des faces avant réalisées comportant une armature réalisée entièrement en acier. Une telle face avant a un poids qui peut atteindre plus de 10 kg.Thus known front faces comprising a frame made entirely of steel. Such a front face has a weight that can reach more than 10 kg.
II est aussi connu des faces avant réalisées en matière hybride « métal-plastique ». On entend par matière hybride « métal plastique », un matériau comportant un métal sur lequel est surmoulé du plastique. Dans un tel matériau hybride, l'accrochage du plastique sur le métal peut s'effectuer par des découpes prévues dans le métal.It is also known front faces made of hybrid material "metal-plastic". Hybrid material "plastic metal" means a material comprising a metal on which is molded plastic. In such a hybrid material, the attachment of the plastic to the metal can be performed by cuts provided in the metal.
Toutefois, ces faces avant ne donnent pas entièrement satisfaction.However, these front faces are not entirely satisfactory.
En outre, les nouvelles réglementations en terme d'émission de polluants entraînent la nécessité de réduire le poids global d'un véhicule automobile. En effet, une réduction de poids de 100 kg permet une diminution de consommation de carburant d'environ 0,4 L/ 100 km.In addition, new regulations in terms of pollutant emissions lead to the need to reduce the weight of a motor vehicle. Indeed, a weight reduction of 100 kg allows a reduction of fuel consumption of about 0.4 L / 100 km.
L'invention vise à améliorer la situation.The invention aims to improve the situation.
A cet effet, l'invention propose une face avant telle que décrite plus haut dans laquelle au moins une partie de l'armature est réalisée en matériau dit sandwich. Le matériau sandwich est composé d'une âme en un premier matériau qui est recouverte sur chacune de ses faces d'une peau en au moins un second matériau.For this purpose, the invention provides a front face as described above wherein at least a portion of the frame is made of said sandwich material. The sandwich material is composed of a core of a first material which is covered on each of its faces with a skin in at least a second material.
Une telle face avant est plus légère que les faces avant de l'art antérieur. L'utilisation du matériau sandwich permet d'obtenir une face avant qui, tout en pesant moins lourd que les faces avant de l'art antérieur, a un comportement en terme de rigidité compatible avec les exigences des constructeurs .Such a front face is lighter than the front faces of the prior art. The use of the sandwich material makes it possible to obtain a front face which, while weighing less weight than the front faces of the prior art, has a behavior in terms of rigidity compatible with the requirements of the manufacturers.
D'autres avantages et caractéristiques de l'invention apparaîtront mieux à la lecture de la description à titre illustratif et non limitatif d'exemples issus des figures sur les dessins annexés dans lesquels :Other advantages and characteristics of the invention will appear better on reading the description by way of illustration and without limitation of examples from the figures in the accompanying drawings in which:
La figure 1 représente une face avant selon l'art antérieur.Figure 1 shows a front face according to the prior art.
La figure 2 représente de manière schématique un matériau dit sandwich qui est utilisé dans une face avant selon l'invention.Figure 2 schematically shows a so-called sandwich material which is used in a front face according to the invention.
La figure 3 représente une face avant selon un mode de réalisation de l'invention.Figure 3 shows a front face according to an embodiment of the invention.
La figure 4 représente un graphique comparant les valeurs raideur à l'arrachage dit « serrure » d'une traverse supérieure/poids, sur une base 100, de l'ensemble «traverse supérieure-jambages» d'une face avant selon l'invention et de faces avant selon l'art antérieur.FIG. 4 represents a graph comparing the stiffness values with the so-called "lock" pulling of a crossmember superior / weight, on a base 100, of the assembly "upper cross-jambs" of a front face according to the invention and front faces according to the prior art.
La figure 5 représente un graphique comparant les valeurs raideur en torsion d'une face avant/poids, sur une base 100, de l'ensemble «traverse supérieure-jambages» d'une face avant selon l'invention et de faces avant selon l'art antérieur.FIG. 5 represents a graph comparing the torsional stiffness values of a front face / weight, on a base 100, of the "upper cross-jambs" assembly of a front face according to the invention and front faces according to FIG. prior art.
La figure 1 représente une face avant 10 telle que connue selon l'art antérieur. La face avant 10 comporte une armature 20 propre à recevoir des équipements du véhicule automobile tels que des projecteurs ou des échangeurs de chaleur (non représentés) .FIG. 1 represents a front face 10 as known according to the prior art. The front face 10 comprises a frame 20 adapted to receive equipment of the motor vehicle such as projectors or heat exchangers (not shown).
L'armature 20 de la face avant 10 est réalisée entièrement en acier. •The frame 20 of the front face 10 is made entirely of steel. •
L'armature 20 comporte une traverse 22 dite supérieure et qui est sensiblement horizontale. La traverse supérieure 22 comporte deux extrémités dites latérales 24-A et 24-B et une partie centrale 26.The armature 20 has a cross member 22 said upper and is substantially horizontal. The upper cross member 22 has two so-called lateral ends 24-A and 24-B and a central portion 26.
On entend par extrémités latérales, les extrémités de la traverse supérieure qui sont aptes à supporter au moins enSide ends are the ends of the upper cross member which are able to support at least
• partie les projecteurs. Autrement dit, les parties latérales peuvent être vues comme des bras s ' étendant de manière sensiblement horizontale et latérale. • part the projectors. In other words, the side portions can be viewed as arms extending substantially horizontally and laterally.
La partie centrale 26 est quant à elle apte à recevoir un support de serrure 28. Le support de serrure 28 est fixé à la traverse supérieure 22.The central portion 26 is in turn adapted to receive a lock support 28. The lock support 28 is fixed to the upper cross member 22.
La traverse supérieure 22 et le support de serrure 28 sont réalisés en acier et comporte une épaisseur d'environ lmm. L'armature 20 comporte en outre deux jambages 30-A et 30-B. Ici, les deux jambages 30-A et 30-B sont sensiblement verticaux et disposés respectivement du côté droit et du côté gauche du véhicule. Ces deux jambages sont, encore appelés "montants" ou "quarts".The upper cross member 22 and the lock bracket 28 are made of steel and has a thickness of about 1 mm. The armature 20 further comprises two legs 30-A and 30-B. Here, the two legs 30-A and 30-B are substantially vertical and arranged respectively on the right side and the left side of the vehicle. These two jambs are still called "amounts" or "quarters".
Les jambages 30-A et 30-B sont reliés par leurs extrémités dites supérieures à la traverse supérieure 22. Autrement dit, les jambages 30-A et 30-B sont réunis entre eux par la traverse 22 disposée entre leurs extrémités supérieures.The legs 30-A and 30-B are connected by their ends said upper to the upper cross member 22. In other words, the legs 30-A and 30-B are joined together by the crosspiece 22 disposed between their upper ends.
Dans ce mode de réalisation, les jambages sont eux aussi réalisés en acier.In this embodiment, the legs are also made of steel.
L'armature 20 comporte en outre une traverse inférieure 32. La traverse inférieure 32 est fixée aux jambages 3OA et 30-B par leurs extrémités dites inférieures . La traverse inférieure 32 s'étend de manière sensiblement horizontale et est parallèle à la traverse supérieure 22.The armature 20 further comprises a lower cross member 32. The lower cross member 32 is fixed to the legs 30A and 30-B by their ends said lower. The lower cross member 32 extends substantially horizontally and is parallel to the upper cross member 22.
La traverse inférieure 32 est aussi réalisée en acier. La traverse inférieure 32 est renforcée par une plaque dite de renfort (non représentée) qui est réalisée en acier.The lower rail 32 is also made of steel. The lower cross member 32 is reinforced by a so-called reinforcing plate (not shown) which is made of steel.
L'armature 20 de la face avant comporte en outre une poutre 34. La poutre 34 est supportée par les jambages 30-A et 30- B. La poutre 34 s 'étendant de manière sensiblement horizontale et parallèlement à la traverse supérieure 22 et à la traverse inférieure 32. La poutre 34 est en acier.The armature 20 of the front face further comprises a beam 34. The beam 34 is supported by the legs 30-A and 30-B. The beam 34 extending substantially horizontally and parallel to the upper cross member 22 and the lower cross member 32. The beam 34 is made of steel.
La poutre 34 et les jambages 30-A et 30-B sont reliés par l'intermédiaire d'absorbeurs de chocs (non visibles) qui sont interposés entre la poutre 34 et chaque jambage 30-A ou 30-B. L'invention concerne une face avant telle que représentée, par exemple, à la figure 3. Une face avant 100 selon l'invention comporte une armature 120. L'armature 120 de la face avant 100 est, ici, réalisée en plusieurs parties. Autrement dit, la face avant 100 comporte plusieurs sections ou morceaux qui sont assemblés les uns avec les autres en vue de former l'armature 120.The beam 34 and the jambs 30-A and 30-B are connected by means of shock absorbers (not visible) which are interposed between the beam 34 and each leg 30-A or 30-B. The invention relates to a front face as shown, for example, in Figure 3. A front face 100 according to the invention comprises a frame 120. The armature 120 of the front face 100 is here made of several parts. In other words, the front face 100 has several sections or pieces that are assembled with each other to form the frame 120.
Selon l'invention, au moins une desdites parties de l'armature 120 est réalisée en matériau dit sandwich. Autrement dit, ici, seule une fraction de l'armature 120 est réalisée en matériau sandwich et non la totalité de cette dernière.According to the invention, at least one of said parts of the frame 120 is made of said sandwich material. In other words, here only a fraction of the armature 120 is made of sandwich material and not all of the latter.
Un tel matériau sandwich est représenté, de manière schématique, à la figure 2. On entend par matériau sandwich un matériau composé d'une âme 200 en un premier matériau qui est recouverte sur chacune de ses faces extérieures 210 et 220 d'une peau en au moins un second matériau.Such a sandwich material is shown, schematically, in FIG. 2. By sandwich material is meant a material composed of a core 200 made of a first material which is covered on each of its outer faces 210 and 220 with a skin in at least one second material.
Autrement dit, il s'agit d'un matériau tri-couche ou encore autrement dit, le matériau sandwich est composé d'une épaisseur de matière 200 intercalée entre deux feuillets dits extérieurs 210 et 220.In other words, it is a tri-layer material or, in other words, the sandwich material is composed of a thickness of material 200 interposed between two so-called outer sheets 210 and 220.
Dans ce mode de réalisation, l'âme 200 est composée d'un polymère, par exemple un plastique, dont l'épaisseur est comprise entre 0,2 et 1,5 mm.In this embodiment, the core 200 is composed of a polymer, for example a plastic, whose thickness is between 0.2 and 1.5 mm.
Les peaux 210 et 220 sont, quant à elles, toutes deux réalisées en feuillet métallique. Ici, il s'agit d'acier, par exemple, recouvert d'une couche de zinc. L'épaisseur des peaux 210 et 220 est, dans ce mode réalisation, de 0,25 mm. Il est toutefois possible d'envisager d'autres rαétals que l'acier, tel que, par exemple, de l'aluminium. Un tel matériau sandwich est notamment décrit dans les demandes de brevets EP 1 651 432 ou EP 1 636 024.The skins 210 and 220 are, for their part, both made of metal sheet. Here, it is steel, for example, covered with a layer of zinc. The thickness of the skins 210 and 220 is, in this embodiment, 0.25 mm. However, it is possible to envisage other reagents than steel, such as, for example, aluminum. Such a sandwich material is in particular described in patent applications EP 1 651 432 or EP 1 636 024.
L'armature 120 de la face avant 100 selon l'invention comporte au moins une traverse 122 dite supérieure.The armature 120 of the front face 100 according to the invention comprises at least one cross member 122 said upper.
La traverse 122 présente au moins une partie réalisée en matériau sandwich.The cross member 122 has at least one portion made of sandwich material.
La traverse 122 est ici réalisée en trois parties. Ainsi, dans ce mode de réalisation, la traverse supérieure 122 comporte deux extrémités dites latérales 124-A et 124-B et une partie centrale 126.The cross member 122 is here made in three parts. Thus, in this embodiment, the upper cross member 122 has two so-called lateral ends 124-A and 124-B and a central portion 126.
Ici aussi, on entend par extrémités latérales, les extrémités de la traverse supérieure qui sont aptes à supporter au moins en partie les projecteurs.Here also, the term lateral ends, the ends of the upper rail which are able to support at least part of the projectors.
Les parties latérales 124-A et 124-B sont ici réalisées dans le matériau sandwich tel que décrit plus haut.Side portions 124-A and 124-B are here made in the sandwich material as described above.
La partie centrale 126 est, quant a elle, ici réalisée en acier.The central portion 126 is, in turn, made of steel.
Dans ce mode de réalisation, les parties latérales 124-A et 124-B comportent une épaisseur de 2mm. La partie centrale 126 comporte, quant à elle, une épaisseur comprise entre 0,5 et 1,5 mm, de préférence 1 mm.In this embodiment, the side portions 124-A and 124-B have a thickness of 2mm. The central portion 126 has a thickness of between 0.5 and 1.5 mm, preferably 1 mm.
Un autre mode de réalisation non représenté propose que l'ensemble de la traverse supérieure soit réalisé dans le matériau sandwich.Another embodiment not shown proposes that all of the upper cross member is made in the sandwich material.
Dans l'exemple de réalisation illustré, les extrémités latérales 124-A et 124-B sont reliées à la partie centraleIn the exemplary embodiment illustrated, the lateral ends 124-A and 124-B are connected to the central portion
126 par collage et/ou apposition de rivets. En d'autres termes, lors de l'assemblage de la traverse supérieure, on munit la partie centrale et/ou les parties latérales de colle. On assemble ensuite les différents éléments de la traverse supérieure qu'on peut éventuellement réunir par des rivets. Enfin, on réticule la colle pour finaliser l'assemblage .126 by gluing and / or affixing rivets. In others terms, when assembling the upper rail, is provided with the central portion and / or the side portions of glue. The various elements of the upper crossbar are then assembled, which may be assembled by rivets. Finally, the glue is reticulated to finalize the assembly.
L'armature 120 de la face avant comporte en outre au moins deux jambages 130-A et 130-B.The frame 120 of the front face further comprises at least two legs 130-A and 130-B.
Les jambages 130-A et 130-B sont reliés par leurs extrémités dites supérieures à la traverse supérieure 122.The jambs 130-A and 130-B are connected by their so-called upper ends to the upper cross member 122.
Les jambages 130-A et 130-B sont, dans cet exemple, réalisés en matériau sandwich. Ils comportent une épaisseur de 2 mm.The legs 130-A and 130-B are, in this example, made of sandwich material. They have a thickness of 2 mm.
Deux bras 134-A et 134-B s'étendent latéralement respectivement, de manière sensiblement horizontale, à partir de chaque jambage 130-A et 130-B, vers l'extérieur.Two arms 134-A and 134-B extend laterally, respectively substantially horizontally, from each leg 130-A and 130-B outwardly.
Le bras 134-A (134-B) , le jambage 130-A (130-B) et la partie latérale 134-A (134-B) de la traverse supérieure 122 définissent un logement destiné à recevoir notamment une optique de phare {non représentée} .The arm 134-A (134-B), the leg 130-A (130-B) and the lateral portion 134-A (134-B) of the upper rail 122 define a housing for receiving in particular a lighthouse optics { not shown}.
Dans ce mode de réalisation, l'armature 120 comporte aussi une traverse inférieure 132 qui est fixée aux jambages 130-A et 130-B par leurs extrémités dites inférieures. La traverse inférieure 132 s'étend de manière sensiblement horizontale et parallèlement à la traverse supérieure 122.In this embodiment, the armature 120 also includes a lower cross member 132 which is fixed to the legs 130-A and 130-B by their so-called lower ends. The bottom rail 132 extends substantially horizontally and parallel to the upper rail 122.
Ici, l'armature 120 est munie d'au moins un support de serrure 128. Le support de serrure 128 est fixé au moins à la traverse supérieure 122. Dans ce mode de réalisation, le support de serrure 128 est plus précisément fixé sur la partie centrale 126 de la traverse supérieure 122.Here, the armature 120 is provided with at least one lock support 128. The lock support 128 is fixed at least to the upper cross member 122. In this embodiment, the Lock support 128 is more precisely fixed on the central portion 126 of the upper cross member 122.
Ladite partie centrale 126 est, notamment prévue en acier et présente une longueur qui est au moins égale à la partie du support de serrure servant à la fixation du support 128 sur la traverse supérieure.Said central portion 126 is, in particular provided steel and has a length that is at least equal to the portion of the lock support for fixing the support 128 on the upper rail.
Ici, le support de serrure est aussi relié à la traverse inférieure 132.Here, the lock support is also connected to the bottom rail 132.
Le support de serrure est réalisé en acier et présente, par exemple, une épaisseur dé 1,3 mm.The lock support is made of steel and has, for example, a thickness of 1.3 mm.
Un mode de réalisation non représenté propose de munir l'armature d'une poutre en acier comme la poutre 34 décrite plus haut .An embodiment not shown proposes to provide the frame with a steel beam as the beam 34 described above.
Autrement dit, selon la présente invention, l'armature 120 de la face avant 100 comporte plusieurs parties assujetties les unes aux autres et une au moins des parties de l'armature 120 est réalisée en matériau sandwich tandis que le reste de l'armature est réalisé dans un autre matériau, par exemple en métal , notamment en acier .In other words, according to the present invention, the armature 120 of the front face 100 comprises several parts secured to each other and at least one part of the armature 120 is made of sandwich material while the rest of the armature is made of another material, for example metal, in particular steel.
La demanderesse a testé différentes configurations de faces avant. Les résultats sont représentés aux figures 4 et 5.Applicant has tested different configurations of front faces. The results are shown in Figures 4 and 5.
Dans le test dont les résultats sont représentés à la figure 4, la demanderesse a déterminé le ratio entre la raideur à l'arrachage, à 600C, de la zone de la traverse supérieure accueillant le support serrure et le poids, sur une baseIn the test whose results are shown in Figure 4, the Applicant has determined the ratio between the stiffness in the tear, 60 0 C, the area of the upper cross member accommodating the lock carrier and the weight on a basis
100, d'un ensemble «traverse supérieure-jambages» d'une face avant d'un encombrement constant et dont ledit ensemble «traverse supérieure-jambages» est réalisé en différents matériaux. Autrement dit, dans ce test, la face avant testée comporte toujours une même armature comportant des traverses inférieure et supérieure, deux jambages, un support serrure et une poutre. Ces différents éléments de l'armature sont tous identiques en terme de forme et d'encombrement entre les différentes faces avant testées. Ainsi, la seule variante de ce test est le type et l'épaisseur du matériau utilisé pour la fabrication des jambages et de la traverse supérieure.100, of a set "upper cross-jambs" a front face of a constant bulk and said assembly "crosses upper-jambs" is made of different materials. In other words, in this test, the tested front face always comprises the same reinforcement comprising lower and upper cross members, two jambs, a lock support and a beam. These different elements of the frame are all identical in terms of shape and size between the different faces before tested. Thus, the only variant of this test is the type and thickness of the material used for the manufacture of the legs and the upper rail.
La demanderesse a comparé les résultats obtenus avec une face avant réalisée tout en acier, une face avant comportant des jambages et une traverse supérieure réalisés en matériau sandwich et une face avant comportant des jambages et une traverse supérieure réalisés en matériau hybride.The Applicant has compared the results obtained with a front made entirely of steel, a front having jambs and an upper cross member made of sandwich material and a front having legs and an upper cross member made of hybrid material.
La demanderesse s'est rendu compte que la face avant comportant au moins une partie de son armature en matériau sandwich est celle qui obtient les résultats les plus intéressants.The Applicant has realized that the front face comprising at least a portion of its sandwich material frame is the one that obtains the most interesting results.
Ainsi, pour des raideurs à l'arrachage, à 600C, s 'étalant entre 200 et 800 N/rnm et de préférence entre 280 et 600 N/mm, une face avant comportant au moins une partie en matériau sandwich, plus particulièrement les pièces mentionnées plus haut, est une face avant présentant un poids inférieur aux faces avant de même raideur mais réalisée en technologies différentes.Thus, for stiffness grubbing, 60 0 C, s' ranging between 200 and 800 N / MNC and preferably between 280 and 600 N / mm, a front face comprising at least a portion sandwiched material, more particularly the parts mentioned above, is a front face having a lower weight to the front faces of the same stiffness but performed in different technologies.
Dans le test dont les résultats sont représentés à la figure 5, la demanderesse a déterminé le ratio entre la raideur en torsion d'une face avant, à 600C, et le poids, sur une base 100, d'un ensemble «traverse supérieure-jambages» des différentes faces avant telles que déjà décrites pour le test précédent . Autrement dit, ici aussi, les faces avant testées comportent toujours une même armature comportant des traverses inférieure et supérieure, deux jambages, un support serrure et une poutre. Ces différents éléments de l'armature sont tous identiques en terme de forme et d'encombrement entre les différentes faces avant testées. A nouveau, la seule variante de ce test est le type et l'épaisseur du matériau utilisé pour la fabrication des jambages et de la traverse supérieure.In the test whose results are shown in Figure 5, the Applicant has determined the ratio of the torsional stiffness of a front face, at 60 0 C, and the weight on a base 100, a set "through upper-jambs' of the different front faces as already described for the previous test. In other words, here too, the front faces tested always include the same frame having lower and upper cross members, two jambs, a lock bracket and a beam. These different elements of the frame are all identical in terms of shape and size between the different faces before tested. Again, the only variant of this test is the type and thickness of the material used to manufacture the jambs and the top rail.
La demanderesse a ainsi comparé les résultats obtenus avec une face avant réalisée tout en acier, une face avant comportant des jambages et une traverse supérieure réalisés en matériau sandwich et une face avant comportant des jambages et une traverse supérieure réalisés en matériau hybride .The Applicant has thus compared the results obtained with a front made entirely of steel, a front having jambs and an upper cross member made of sandwich material and a front having jambs and an upper cross member made of hybrid material.
A nouveau, il s'avère que la face avant comportant au moins une partie de son armature en matériau sandwich est celle qui obtient les résultats les plus intéressants.Again, it turns out that the front with at least a portion of its sandwich material frame is the one that gets the most interesting results.
Ainsi, pour des raideurs en torsion, à 600C, s 'étalant entre 17900 et 18050 Nm/0, une face avant comportant au moins une partie en matériau sandwich, plus particulièrement les pièces mentionnées plus haut, est une face avant présentant un poids inférieur aux faces avant de même raideur mais réalisée en technologies différentes. Thus, for torsional stiffness, at 60 ° C., spreading between 17900 and 18050 Nm / 0 , a front face comprising at least one part made of sandwich material, more particularly the parts mentioned above, is a front face presenting a weight lower than the front faces of the same stiffness but realized in different technologies.

Claims

Revendications claims
1. Face avant (100) pour véhicule automobile comportant une armature (120) propre à recevoir des équipements, caractérisée en ce qu'au moins une partie de ladite armature1. Front face (100) for a motor vehicle having a frame (120) adapted to receive equipment, characterized in that at least a portion of said frame
(120) est réalisée en matériau dit sandwich, ledit matériau sandwich étant compose d'une âme (200) en un premier matériau qui est recouverte sur chacune de ses faces d'une peau (210 ; 220) en au moins un second matériau.(120) is made of said sandwich material, said sandwich material being composed of a core (200) of a first material which is covered on each of its faces with a skin (210; 220) in at least one second material.
2. Face avant selon la revendication 1, dans laquelle ladite âme (200) et ladite peau (210, 220) sont respectivement composées d'un polymère plastique et d'un feuillet métallique.2. Front face according to claim 1, wherein said core (200) and said skin (210, 220) are respectively composed of a plastic polymer and a metal sheet.
3. Face avant selon la revendication 1 ou 2 , dans laquelle ladite armature (120) comporte au moins une traverse (122) dite supérieure et dans laquelle ladite traverse supérieure (122) comporte deux extrémités dites latérales (124-A, 124- B) et une partie centrale (126) et dans laquelle ladite partie centrale (126) et lesdites parties latérales (124-A, 124-B) sont respectivement réalisées en acier et en dit matériau sandwich.3. Front face according to claim 1 or 2, wherein said armature (120) comprises at least one cross member (122) said upper and wherein said upper cross member (122) has two so-called lateral ends (124-A, 124-B). ) and a central portion (126) and wherein said central portion (126) and said side portions (124-A, 124-B) are respectively made of steel and said sandwich material.
4. Face avant selon la revendication précédente, dans laquelle lesdites extrémités latérale (124-A, 124-B) de ladite traverse supérieure (122) sont reliés à ladite partie centrale (126) de ladite traverse supérieure (122) par collage et/ou par des rivets.4. Front face according to the preceding claim, wherein said lateral ends (124-A, 124-B) of said upper cross member (122) are connected to said central portion (126) of said upper cross member (122) by gluing and / or by rivets.
5. Face avant selon la revendication 3 ou 4, dans laquelle ladite partie centrale (126) comporte une épaisseur comprise entre 0,5 et 1,5 mm. 5. Front face according to claim 3 or 4, wherein said central portion (126) has a thickness of between 0.5 and 1.5 mm.
6. Face avant selon l'une des revendications 1 à 5, dans laquelle ladite armature (120) comporte au moins deux jambages (130-A, 130-B) , lesdits jambages (130-A, 130-B) étant reliés par leurs extrémités dites supérieures à une traverse supérieure (122) et dans laquelle leεdits jambages (130-A, 130-B) sont réalisés également en dit matériau sandwich.6. Front face according to one of claims 1 to 5, wherein said armature (120) comprises at least two legs (130-A, 130-B), said legs (130-A, 130-B) being connected by their ends said to be greater than an upper cross member (122) and in which said legs (130-A, 130-B) are also made of said sandwich material.
7. Face avant selon la revendication précédente comportant en outre une traverse inférieure (132), ladite traverse inférieure (132) étant fixée auxditε jambages (130-A, 130-B) par leurs extrémités dites inférieures.7. Front face according to the preceding claim further comprising a lower cross member (132), said lower cross member (132) being fixed to said jambs (130-A, 130-B) by their so-called lower ends.
8. Face avant selon l'une des revendications . 3 à 7, comportant en outre au moins un support de serrure (128) , ledit support de serrure (128) étant fixé à ladite traverse supérieure (122) .8. Front face according to one of the claims. 3 to 7, further comprising at least one lock bracket (128), said lock bracket (128) being attached to said top rail (122).
9. Face avant selon la revendication précédente dans laquelle ledit support de serrure (128) est fixé sur ladite partie centrale (126) de la traverse supérieure (122) .9. Front face according to the preceding claim wherein said lock support (128) is fixed on said central portion (126) of the upper rail (122).
10. Face avant selon l'une des revendications précédentes, dans laquelle ladite armature (120) présente une raideur à l'arrachage comprise entre 200 et 800 N/mm.10. Front face according to one of the preceding claims, wherein said armature (120) has a pulling stiffness of between 200 and 800 N / mm.
11. Face avant selon l'une des revendications précédentes, dans laquelle ladite armature (120) présente une raideur à en torsion comprise entre 17900 et 18050 Nm/0. 11. Front face according to one of the preceding claims, wherein said armature (120) has a torsional stiffness between 17900 and 18050 Nm / 0 .
PCT/EP2008/062768 2007-10-24 2008-09-24 Motor vehicle front end WO2009053199A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0707486A FR2922853B1 (en) 2007-10-24 2007-10-24 FRONT PANEL FOR MOTOR VEHICLE
FR0707486 2007-10-24

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WO2009053199A1 true WO2009053199A1 (en) 2009-04-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022242844A1 (en) * 2021-05-19 2022-11-24 HELLA GmbH & Co. KGaA Support frame for a vehicle lighting device

Citations (2)

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Publication number Priority date Publication date Assignee Title
WO2003008256A1 (en) * 2001-07-18 2003-01-30 Decoma International Inc. Composite component integration panel for a motor vehicle
EP1449748A1 (en) * 2003-02-18 2004-08-25 Compagnie Plastic Omnium Front end odule for a car, with reinforced upper cross beam

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003008256A1 (en) * 2001-07-18 2003-01-30 Decoma International Inc. Composite component integration panel for a motor vehicle
EP1449748A1 (en) * 2003-02-18 2004-08-25 Compagnie Plastic Omnium Front end odule for a car, with reinforced upper cross beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022242844A1 (en) * 2021-05-19 2022-11-24 HELLA GmbH & Co. KGaA Support frame for a vehicle lighting device

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FR2922853B1 (en) 2009-12-18

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