EP4240636A1 - Vehicle hood - Google Patents

Vehicle hood

Info

Publication number
EP4240636A1
EP4240636A1 EP21806313.9A EP21806313A EP4240636A1 EP 4240636 A1 EP4240636 A1 EP 4240636A1 EP 21806313 A EP21806313 A EP 21806313A EP 4240636 A1 EP4240636 A1 EP 4240636A1
Authority
EP
European Patent Office
Prior art keywords
front edge
stiffener
edge
cover
hood
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21806313.9A
Other languages
German (de)
French (fr)
Inventor
Herve Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stellantis Auto SAS
Original Assignee
PSA Automobiles SA
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 PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP4240636A1 publication Critical patent/EP4240636A1/en
Pending legal-status Critical Current

Links

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
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • 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
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/12—Parts or details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components

Definitions

  • the present invention relates to a motor vehicle cover. It relates in particular to a stiffener for a motor vehicle bonnet. It finds particular application in the impact behavior of the vehicle bonnet. It also relates to a motor vehicle comprising a bonnet according to the invention TECHNOLOGICAL BACKGROUND OF THE INVENTION
  • femur shock causes serious and in some cases irreversible lesions in the event that the system dedicated to a femur shock undergoes stresses from forces and moments that are too high.
  • the object of the invention is to provide a front bonnet for a motor vehicle, the design of which, and in particular an optimized stiffness of the front part of the bonnet, makes it possible to meet pedestrian protection standards, in particular for pedestrian impacts of the femur type.
  • the subject of the invention is therefore a front bonnet for a motor vehicle comprising: an outer skin and a lining comprising a bottom wall spaced from the outer skin, the bonnet comprising a front edge and an opposite rear edge, two side edges connecting the front and rear edges on either side of the hood, a stiffener between the outer skin and the lining
  • said cover being characterized in that it comprises an absorption edge corresponding to at least part of the front edge of the cover located on either side of a middle zone of said front edge, the absorption edge being between the stiffener and the front edge of the bonnet, so that the stiffness of the absorption edge in a longitudinal direction, the longitudinal direction corresponding to the longitudinal direction of the vehicle once the bonnet is installed on the vehicle, in the direction of the front edge towards the rear edge of said cowl, along said absorption edge, is lower than the rigidity, in this longitudinal direction, of the middle zone of said front edge.
  • the invention contributes to the vehicle having a sufficient absorption stroke for at least part of the zone provided behind the impact zone located between the top of the front bumper and the nose of the bonnet in the case of a femur shock. This reduces the difference in rigidity between the front of the bonnet and the top of the bumper and/or the grille, the rigidity of the bonnet being stiffer before the invention.
  • the absorption edge extends on either side of the middle zone of said front edge as far as the side edges of the cover.
  • the absorption zones at the front of the vehicle are preferred, located more on the sides of the vehicle than in the center, which corresponds to usual cases where an avoidance has occurred during the pedestrian impact.
  • the rigidity of the absorption edge decreases from the middle zone towards the side edges.
  • the stiffener comprises a front edge extending from the side of the front edge of the cover, said front edge of the stiffener comprising a central part and two side parts arranged on either side of the central part, the central part of the stiffener being opposite the middle zone, and the lateral zones of the stiffener being arranged opposite the absorption edge of the cowl, the central part of the said front edge of the stiffener being arranged closer to the front edge of the cover than the two lateral parts of the front edge.
  • the cover comprises a striker wire fixed to the facing lining facing the central part of the stiffener.
  • the lateral parts of the front edge of the stiffener comprise, on each side of the central part, at least two segments, a first segment connected to the central part and a second segment between the first segment and the side edge of the cowl, the front edge of the stiffener in the second segment being arranged further towards the rear edge of the cowl than the front edge of the stiffener in the first segment.
  • the front edge of the stiffener comprises: A first connecting portion between the front edge in the central part of the stiffener and the first segment,
  • each connecting portion forms an acute angle (a1, a2) between zero degrees and sixty degrees relative to a longitudinal and vertical plane of the vehicle when the hood is installed on said vehicle, the vertex of the angle corresponding to the point of each connecting portion closest to the front edge of the bonnet of each connecting portion.
  • the dimension of the stiffener in the longitudinal direction is reduced as it moves away from the central part towards the side edges of the cover.
  • the invention also relates to a vehicle comprising a bonnet according to the invention.
  • FIG.1 shows a top view of a flap in which the outer skin has been removed.
  • FIG.2 schematically represents a top view of a stiffener according to the invention.
  • the X direction is the longitudinal axis of the vehicle in running order.
  • the Y direction is the transverse direction of the vehicle in running order.
  • the Z direction is the vertical of the vehicle oriented upwards.
  • front refers to the front of the vehicle and rear refers to the rear of the vehicle in running order.
  • Figure 1 schematically shows a view of a vehicle front cover according to the invention, comprising an outer skin, a liner 2 and a stiffener 3, with in this view the outer skin which is not shown.
  • the front bonnet for a motor vehicle comprising: an outer skin and a lining 2 comprising a bottom wall 21 spaced from the outer skin, the bonnet 100 comprising a front edge 101 and an opposite rear edge, two side edges 103, 104, connecting the front and rear edges on either side of the cover.
  • the front cover further comprises a stiffener 3 placed between the outer skin and the lining 2.
  • the cover 100 comprises an absorption edge 111 corresponding to at least a part of the front edge 101 of the cover, located on either side of a middle zone 110 of said front edge 101 .
  • the absorption edge 111 being located between the stiffener 3 and the front edge 101 of the bonnet, so that the rigidity of the bonnet in a longitudinal direction, the longitudinal direction corresponding to the longitudinal direction X of the vehicle once the bonnet 100 installed on the vehicle, in the direction from the front edge to the rear edge of said bonnet 100, along said absorption edge 111, is lower than the rigidity in this longitudinal direction of the middle zone 110 of said front edge 101 .
  • the stiffener 3 arranged between the outer skin of the bonnet and the lining 2 makes it possible to stiffen the bonnet 100 with respect to aerodynamic forces, in particular when the vehicle is moving.
  • the stiffener has the particular function of preventing visible vibrations of the outer skin of the bonnet.
  • the stiffener 3 comprises fixing lugs 32 extending from a main body of the stiffener 3, in the form of a plate, in the direction of the lining 2.
  • the stiffener 3 is fixed to the lining 2 by clinching at the ends of the fixing lugs 32.
  • the stiffener 3 also has the function of providing energy absorption means during a vertical head impact on the hood, in particular in the middle part 110 and at the hood front.
  • the rigidities of the fixing lugs 32 are chosen to bend from a certain force so as to absorb the energy of a vertical head impact.
  • the stiffener 3 is fixed to the outer skin by bonding zones 31 .
  • the absorption edge 111 extends on either side of a middle zone 110 of said front edge 101 as far as the side edges 103, 104 of the cover.
  • the terms "up to the side edges” mean that the side edges of the absorption edge, that is to say the edges furthest transversely from the longitudinal axis in the middle of the vehicle and located vis-à-vis the side edges of the cover 103, 104, are closest to the fixing zone of the liner with the outer skin, for example by crimping, but without interfering with the fixing or the crimping of the liner 2 with the outer skin.
  • the absorption edge 111 extends on either side of a middle zone 110 of said front edge 101 "up to proximity" to the side edges 103, 104 of the cover.
  • the terms "up to proximity” mean that the lateral ends of the stiffener stop in the transverse direction when the lining 2 rises upwards in the direction of the outer skin, the cowl 100 being in the vehicle position, so so that the stiffener 3 can play its role of absorbing head impact energy.
  • the stiffener 3 comprises a front edge 301 extending from the side of the front edge of the cover 101, comprising a central part 310 and two side parts 311 arranged on either side of the central part 310, the central part 310 of said front edge of the stiffener 301 being arranged closer to the front edge of the bonnet than the two lateral parts 311 of the front edge of the bonnet, the central part being opposite the middle zone 110.
  • the two side parts of the stiffener 311 extend as far as the side edges 103, 104 of the cover.
  • the terms "up to the side edges” means that the side ends of the side parts 311 of the stiffener 3, that is to say the side ends of the parts 311 of the stiffener 3 furthest transversely from the longitudinal axis in the middle of the vehicle and located vis-à-vis the side edges 103, 104 of the bonnet, are as close as possible to the zone for fixing the lining with the outer skin, for example by crimping, but without interfering with the fixing or crimping the liner with the outer skin, being a few centimeters from the crimping zone, for example less than ten centimeters, preferably less than five centimeters, from the side edges of the cover.
  • zones 31 for fixing the stiffener by bonding to the outer skin of the cowl are located close to the lateral ends of the stiffener 3 thus approaching as close as possible to the crimping zone of the lining to the outer skin, so as to prevent vibrations of the outer skin of the hood 100 under aerodynamic forces when the vehicle is moving.
  • the cover 100 comprises a striker wire fixed to the lining 2 opposite the zone 110 in the middle of the front edge 101 of the cover.
  • the central part 310 of the stiffener 3 is closer to the front edge 101 of the cowl than on either side of this middle zone 110.
  • the stiffener 3 closer to the front edge in this middle zone 110 of the hood makes it possible to improve the behavior of the hood 100 during a vertical head impact on the hood in this middle zone 110, by providing means of energy absorption, and also allowing it to limit the stroke of head during a head impact in the direction of the striker and the lock hook when the bonnet is fitted to the vehicle.
  • the front edge 301 of the central part of the stiffener 310 is as close as possible to the crimping zone between the liner 2 and the outer skin in the middle zone 110, without interfering with the crimping operations, of the liner with the outer skin.
  • a bonding zone between the stiffener 3 and the outer skin is located at the limit of the front edge of the central part 310 of the stiffener.
  • the lateral parts 311 of the front edge of the stiffener 3 comprise, on each side of the central part, at least two segments S1, S2, a first segment S1 connected to the central part 310 and a second segment S2 between the first segment and the side edge of the cover, the front edge of the stiffener in the second segment S2 being closer to the rear edge of the cover 100 than the front edge of the stiffener in the first segment S1.
  • the front edge 301 of the stiffener has a staircase shape, with each step comprising a segment arranged closer to the rear edge of the cowl than the previous one closer to the central part 310 of the stiffener.
  • the stiffener 3 comprises at the level of each segment a fixing lug 32, extending in the direction of the lining 2, with the end of the fixing lug 32 distal from the body of the stiffener which is for example fixed by clinching to the lining
  • the front edge of the stiffener 3 comprises:
  • each connecting portion L1, L2 forms an acute angle (a1, a2) between zero degrees and seventy-five degrees with respect to a longitudinal and vertical plane of the vehicle when the bonnet 100 is installed on said vehicle, the apex of the angle corresponding to the point of each connecting portion closest to the front edge of the hood.
  • the angle between each connecting portion and a longitudinal and vertical plane of the vehicle is therefore acute and open towards the rear of the vehicle.
  • each step comprises successively, starting from the central part of the stiffener, a connecting portion followed by a segment, which thus forms a step.
  • This succession of steps contributes in a simple way to keeping the front edge 311 of the stiffener at a good distance from the front edge of the bonnet, and to promote a longitudinal absorption stroke during a pedestrian impact, in particular for a femur impact.
  • the dimension of the stiffener in the longitudinal direction is reduced as it moves away from the central part towards the side edges 103, 104 of the cover.
  • the rigidity in the longitudinal direction of the stiffener 3 decreases as a function of the lateral distance to the central part 310, that is to say by approaching the side edges 103, 104, of the cowl, which contributes to to reduce the longitudinal rigidity of the bonnet as a function of the distance from the middle zone of the bonnet and to promote a longitudinal absorption stroke during a pedestrian impact, in particular for a femur impact.
  • the stiffener 3 comprises a first connecting portion L1 on the front edge of the stiffener 23 starting at a distance d1 of the order of 180 millimeters to 190 millimeters in transverse with respect to the middle of the front edge 101 of the cover, this first portion forming an angle b1 close to 50° with respect to a longitudinal and vertical plane, in a sub-variant b1 is equal to 54°.
  • This first connecting portion L1 is followed by a first segment S1 making an angle a1 close to 80° with respect to a longitudinal and vertical plane, in a sub-variant a1 is equal to 85°.
  • the end of the first segment S1 closest to the side edge of the bonnet is at approximately a distance d2 of the order of 450 millimeters with respect to the middle of the front edge 101 of the bonnet, in a sub-variant d2 is equal to 430 millimeters.
  • This first segment S1 is followed by a second connecting portion L2 forming an angle b2 close to 50° with respect to a longitudinal and vertical plane, in a sub-variant b2 is equal to 44°.
  • This second connecting portion L2 is followed by a second segment S2 making an angle a2 close to 75° with respect to a longitudinal and vertical plane, in an above-variant a2 is equal to 80°.
  • the invention also relates to a vehicle comprising a bonnet according to the invention.

Abstract

Front hood for a motor vehicle, comprising an outer skin and a liner (2) comprising a bottom wall (21) set apart from the outer skin, the hood (100) comprising a front edge (101) and opposite this a rear edge, two lateral edges (103, 104) connecting the front and rear edges on either side of the hood, a stiffener (3) between the outer skin and the liner (2), said hood (100) being noteworthy in that it comprises an absorption edge (111) corresponding to at least part of the front edge (101) of the hood, located on either side of a middle region (110) of said front edge (101), the absorption edge (111) being between the stiffener (3) and the front edge (101) of the hood, in such a way that the stiffness of the hood in a longitudinal direction - the longitudinal direction corresponding to the longitudinal direction of the vehicle once the hood (100) is installed on the vehicle - in the sense from the front edge (101) to the rear edge of said hood, along said absorption edge (111), is less than the stiffness, in that longitudinal direction, of the middle region (110) of said front edge.

Description

Description Description
Titre de l'invention: CAPOT DE VEHICULE Title of the invention: VEHICLE HOOD
DOMAINE TECHNIQUE DE L’INVENTION TECHNICAL FIELD OF THE INVENTION
[0001] La présente invention concerne un capot de véhicule automobile. Elle concerne en particulier un raidisseur pour capot de véhicule automobile. Elle trouve une application particulière dans le comportement aux chocs du capot de véhicule. Elle concerne aussi un véhicule automobile comportant un capot selon l’invention ARRIÈRE-PLAN TECHNOLOGIQUE DE L'INVENTION The present invention relates to a motor vehicle cover. It relates in particular to a stiffener for a motor vehicle bonnet. It finds particular application in the impact behavior of the vehicle bonnet. It also relates to a motor vehicle comprising a bonnet according to the invention TECHNOLOGICAL BACKGROUND OF THE INVENTION
[0002] Les accidents de la circulation entre un véhicule automobile et un piéton conduisent à des risques de lésions sur trois principales parties du corps du piéton : la tête contre le capot (de la zone avant jusqu’à proximité du pare-brise), la jambe supérieure (zone hanche, fémur), contre le nez de capot et la jambe inférieure (tibia), contre le pare-chocs. Les futurs véhicules devront alors respecter des protocoles de tests, représentatifs de ces trois aspects, utilisant des systèmes adaptés pour réduire les lésions lors d'un choc avec un piéton. [0002] Traffic accidents between a motor vehicle and a pedestrian lead to risks of injury to three main parts of the pedestrian's body: the head against the hood (from the front area to near the windshield), the upper leg (hip area, femur), against the bonnet nose and the lower leg (tibia), against the bumper. Future vehicles will then have to comply with test protocols, representative of these three aspects, using appropriate systems to reduce injuries in the event of an impact with a pedestrian.
[0003] Le choc dit fémur provoque des lésions graves et dans certains cas irréversibles dans le cas où le système dédié à un choc fémur subit des sollicitations d’efforts et de moments trop élevés. [0003] The so-called femur shock causes serious and in some cases irreversible lesions in the event that the system dedicated to a femur shock undergoes stresses from forces and moments that are too high.
[0004] Pour tenter de diminuer les conséquences de telles sollicitations, lors du test fémur, une préconisation couramment admise consiste à amortir le choc fémur sur la partie avant du capot. [0004] In an attempt to reduce the consequences of such stresses, during the femur test, a commonly accepted recommendation consists in damping the femur impact on the front part of the cover.
[0005] Pour cela, une course d'absorption suffisante doit être ménagée derrière la zone d'impact située entre le haut du pare-chocs avant et le nez du capot. [0006] Toutefois, cette disposition n'est pas suffisante car la raideur de cette zone d'impact doit être le plus homogène possible sur toute la majorité de la zone d’impact potentiel du fémur: ladite zone incluant notamment dans le cas de la plupart des véhicules dits légers par opposition aux véhicules destinés aux transports des marchandises le nez de capot et le haut du pare-chocs avant. Ces pièces pouvant être de raideur très différentes, cela engendre des moments excessifs sur le système dédié au choc fémur. Effectivement, le nez de capot est généralement en métal et toujours plus raide que le haut du pare-chocs et/ou de la calandre qui sont des pièces le plus souvent réalisées en matière plastique. [0007] D'une manière générale, les capots avant des véhicules automobiles jusqu'à présent qui comportent des zones plus ou moins rigides, ne permettent pas de satisfaire aux nouvelles normes de protection des piétons. [0005] For this, a sufficient absorption stroke must be provided behind the impact zone located between the top of the front bumper and the nose of the bonnet. [0006] However, this arrangement is not sufficient because the stiffness of this impact zone must be as homogeneous as possible over the entire majority of the potential impact zone of the femur: said zone including in particular in the case of the most so-called light vehicles as opposed to vehicles intended for the transport of goods the bonnet nose and the top of the front bumper. These parts can be of very different stiffness, this generates excessive moments on the system dedicated to the femur impact. Indeed, the nose of the bonnet is generally made of metal and always stiffer than the top of the bumper and/or the grille which are parts most often made of plastic. [0007] In general, the front bonnets of motor vehicles up to now, which have more or less rigid zones, do not make it possible to meet the new standards for the protection of pedestrians.
[0008] L'invention a pour but de proposer un capot avant de véhicule automobile dont la conception et notamment une raideur optimisée de la partie avant du capot permet de satisfaire aux normes de protection des piétons, notamment pour les chocs piétons de type fémur. [0008] The object of the invention is to provide a front bonnet for a motor vehicle, the design of which, and in particular an optimized stiffness of the front part of the bonnet, makes it possible to meet pedestrian protection standards, in particular for pedestrian impacts of the femur type.
[0009] L'invention a donc pour objet un capot avant pour véhicule automobile comprenant : une peau externe et une doublure comprenant une paroi de fond écartée de la peau externe, le capot comportant un bord avant et un bord arrière opposé, deux bords latéraux reliant les bords avant et arrière de part et d’autre du capot, un raidisseur entre la peau externe et la doublure [0009] The subject of the invention is therefore a front bonnet for a motor vehicle comprising: an outer skin and a lining comprising a bottom wall spaced from the outer skin, the bonnet comprising a front edge and an opposite rear edge, two side edges connecting the front and rear edges on either side of the hood, a stiffener between the outer skin and the lining
, ledit capot étant caractérisé en ce que il comporte un bord d’absorption correspondant à au moins une partie du bord avant du capot situé de part et d’autre d’une zone milieu dudit bord avant, le bord d’absorption étant entre le raidisseur et le bord avant du capot, de sorte que la rigidité du bord d’absorption dans une direction longitudinale, la direction longitudinale correspondant à la direction longitudinale du véhicule une fois le capot installé sur le véhicule, dans le sens du bord avant vers le bord arrière dudit capot, le long dudit bord d’absorption, est plus faible que la rigidité, dans cette direction longitudinale, de la zone milieu dudit bord avant. , said cover being characterized in that it comprises an absorption edge corresponding to at least part of the front edge of the cover located on either side of a middle zone of said front edge, the absorption edge being between the stiffener and the front edge of the bonnet, so that the stiffness of the absorption edge in a longitudinal direction, the longitudinal direction corresponding to the longitudinal direction of the vehicle once the bonnet is installed on the vehicle, in the direction of the front edge towards the rear edge of said cowl, along said absorption edge, is lower than the rigidity, in this longitudinal direction, of the middle zone of said front edge.
[00010] Ainsi l’invention contribue à ce que le véhicule ait une course d'absorption suffisante pour au moins une partie de la zone ménagée derrière la zone d'impact située entre le haut du pare-chocs avant et le nez du capot dans le cas d’un choc fémur. Ainsi on réduit l’écart de rigidité entre l’avant du capot et le haut du pare-chocs et/ou la calandre, la rigidité du capot étant plus raide avant l’invention. [00010] Thus the invention contributes to the vehicle having a sufficient absorption stroke for at least part of the zone provided behind the impact zone located between the top of the front bumper and the nose of the bonnet in the case of a femur shock. This reduces the difference in rigidity between the front of the bonnet and the top of the bumper and/or the grille, the rigidity of the bonnet being stiffer before the invention.
[00011] Selon un mode de réalisation de l’invention, le bord d’absorption s’étend de part et d’autre de la zone milieu dudit bord avant jusqu’aux bords latéraux du capot. [00012] Ainsi sont privilégiées les zones d’absorption à l’avant du véhicule se situant plutôt sur les côtés du véhicule qu’au centre, ce qui correspond à des cas usuels où un évitement est survenu lors du choc piéton. [00011] According to one embodiment of the invention, the absorption edge extends on either side of the middle zone of said front edge as far as the side edges of the cover. [00012] Thus, the absorption zones at the front of the vehicle are preferred, located more on the sides of the vehicle than in the center, which corresponds to usual cases where an avoidance has occurred during the pedestrian impact.
[00013] Dans un mode de réalisation de l’invention, la rigidité du bord d’absorption décroit depuis la zone milieu vers les bords latéraux. [00013] In one embodiment of the invention, the rigidity of the absorption edge decreases from the middle zone towards the side edges.
[00014] Dans un mode de réalisation de l’invention, le raidisseur comporte un bord avant s’étendant du côté du bord avant du capot, ledit bord avant du raidisseur comportant une partie centrale et deux parties latérales disposées de part et d’autre de la partie centrale, la partie centrale du raidisseur étant en vis-à-vis de la zone milieu, et les zones latérales du raidisseur étant disposées en vis-à-vis du bord d’absorption du capot, la partie centrale dudit bord avant du raidisseur étant disposée plus proche du bord avant du capot que les deux parties latérales du bord avant. In one embodiment of the invention, the stiffener comprises a front edge extending from the side of the front edge of the cover, said front edge of the stiffener comprising a central part and two side parts arranged on either side of the central part, the central part of the stiffener being opposite the middle zone, and the lateral zones of the stiffener being arranged opposite the absorption edge of the cowl, the central part of the said front edge of the stiffener being arranged closer to the front edge of the cover than the two lateral parts of the front edge.
[00015] Ainsi le fait d’avoir des parties latérales plus éloignées du bord avant du capot que la partie centrale du raidisseur, confère au capot une course d’absorption supérieure au niveau du bord d’absorption en vis à vis des parties latérales. [00015] Thus the fact of having side parts farther from the front edge of the cowl than the central part of the stiffener, gives the cowl a greater absorption travel at the level of the absorption edge facing the side parts.
[00016] Dans un mode de réalisation de l’invention, le capot comprend un fil de gâche fixé sur la doublure en vis-à-vis en vis-à-vis de la partie centrale du raidisseur. [00016] In one embodiment of the invention, the cover comprises a striker wire fixed to the facing lining facing the central part of the stiffener.
[00017] Ainsi la partie centrale du raidisseur en étant plus proche du bord avant du capot que les parties latérales dudit raidisseur, cela confère plus de rigidité autour du fil de gâche destiné à assurer la fermeture du capot. Cela apporte aussi plus de capacité à protéger la tête d’un piéton lors d’un choc tête en vertical dans cette zone en vis-à-vis de la zone centrale du raidisseur. [00017] Thus the central part of the stiffener being closer to the front edge of the cover than the side parts of said stiffener, this gives more rigidity around the striker wire intended to ensure the closing of the cover. This also provides more capacity to protect a pedestrian's head during a vertical head impact in this zone opposite the central zone of the stiffener.
[00018] Dans un mode de réalisation de l’invention, les parties latérales du bord avant du raidisseur comportent de chaque côté de la partie centrale, au moins deux segments, un premier segment relié à la partie centrale et un deuxième segment entre le premier segment et le bord latéral du capot, le bord avant du raidisseur dans le deuxième segment étant disposé d’avantage vers le bord arrière du capot que le bord avant du raidisseur dans le premier segment. In one embodiment of the invention, the lateral parts of the front edge of the stiffener comprise, on each side of the central part, at least two segments, a first segment connected to the central part and a second segment between the first segment and the side edge of the cowl, the front edge of the stiffener in the second segment being arranged further towards the rear edge of the cowl than the front edge of the stiffener in the first segment.
[00019] Dans un mode de réalisation de l’invention, le bord avant du raidisseur comporte : Une première portion de liaison entre le bord avant en partie centrale du raidisseur et le premier segment, In one embodiment of the invention, the front edge of the stiffener comprises: A first connecting portion between the front edge in the central part of the stiffener and the first segment,
Une deuxième portion de liaison entre le premier segment et le deuxième segment, chaque portion de liaison forme un angle (a1 , a2) aigue compris entre zéro degré et soixante degrés par rapport un plan longitudinal et vertical du véhicule lorsque le capot est installé sur ledit véhicule, le sommet de l’angle correspondant au point de chaque portion de liaison le plus en proche du bord avant du capot de chaque portion de liaison. A second connecting portion between the first segment and the second segment, each connecting portion forms an acute angle (a1, a2) between zero degrees and sixty degrees relative to a longitudinal and vertical plane of the vehicle when the hood is installed on said vehicle, the vertex of the angle corresponding to the point of each connecting portion closest to the front edge of the bonnet of each connecting portion.
[00020] Dans un mode de réalisation de l’invention, la dimension du raidisseur suivant la direction longitudinale se réduit en s’éloignant de la partie centrale vers les bords latéraux du capot. In one embodiment of the invention, the dimension of the stiffener in the longitudinal direction is reduced as it moves away from the central part towards the side edges of the cover.
[00021] L’invention concerne aussi un véhicule comportant un capot selon l’invention. The invention also relates to a vehicle comprising a bonnet according to the invention.
DESCRIPTION DETAILLEE DETAILED DESCRIPTION
[00022] L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels : The invention will be better understood on reading the following description, given solely by way of example and made with reference to the accompanying drawings, in which:
[00023] [fig.1 ] représente une vue de dessus d’un capot dans quelle la peau externe a été enlevée. [00023] [fig.1] shows a top view of a flap in which the outer skin has been removed.
[00024] [fig.2] représente schématiquement une vue de dessus d’un raidisseur selon l’invention. [00024] [fig.2] schematically represents a top view of a stiffener according to the invention.
[00025] [fig .3] présente schématiquement une vue d’un raidisseur selon l’invention [00025] [fig .3] schematically shows a view of a stiffener according to the invention
[00026] Les dessins sont des représentations schématiques servant à faciliter la compréhension de l’invention. Les composants ne sont pas forcément représentés à l’échelle. [00026] The drawings are schematic representations serving to facilitate the understanding of the invention. Components may not be shown to scale.
[00027] Dans la description qui suit, le terme « comprendre » est synonyme de « inclure » et n’est pas limitatif en ce qu’il autorise la présence d’autres éléments ou composants ou parties d’un capot. Il est entendu que le terme « comprendre » inclut les termes « consister en ». Sur les différentes figures, les mêmes références désignent des éléments identiques ou similaires. [00028] La direction X est l’axe longitudinal du véhicule en ordre de marche. La direction Y est la direction transverse du véhicule en ordre de marche. La direction Z est la verticale du véhicule orientée vers le haut. [00027] In the description which follows, the term “comprise” is synonymous with “include” and is not limiting in that it authorizes the presence of other elements or components or parts of a cover. It is understood that the term “include” includes the terms “consist of”. In the various figures, the same references designate identical or similar elements. [00028] The X direction is the longitudinal axis of the vehicle in running order. The Y direction is the transverse direction of the vehicle in running order. The Z direction is the vertical of the vehicle oriented upwards.
[00029] Dans la description qui suit le terme avant se rapportant à l’avant du véhicule et l’arrière se rapporte à l’arrière du véhicule en ordre de marche. [00029] In the following description, the term front refers to the front of the vehicle and rear refers to the rear of the vehicle in running order.
[00030] La figure 1 représente schématiquement une vue d’un capot avant de véhicule selon l’invention, comprenant une peau externe, une doublure 2 et un raidisseur 3, avec dans cette vue la peau externe qui n’est pas représentée. [00030] Figure 1 schematically shows a view of a vehicle front cover according to the invention, comprising an outer skin, a liner 2 and a stiffener 3, with in this view the outer skin which is not shown.
Le capot avant pour véhicule automobile selon l’invention comprenant : une peau externe et une doublure 2 comprenant une paroi de fond 21 écartée de la peau externe, le capot 100 comportant un bord avant 101 et un bord arrière opposé, deux bords latéraux 103, 104, reliant les bords avant et arrière de part et d’autre du capot. Le capot avant comprend en outre un raidisseur 3 disposé entre la peau externe et la doublure 2. Le capot 100 comporte un bord d’absorption 111 correspondant à au moins une partie du bord avant 101 , du capot, située de part et d’autre d’une zone milieu 110 dudit bord avant 101 . The front bonnet for a motor vehicle according to the invention comprising: an outer skin and a lining 2 comprising a bottom wall 21 spaced from the outer skin, the bonnet 100 comprising a front edge 101 and an opposite rear edge, two side edges 103, 104, connecting the front and rear edges on either side of the cover. The front cover further comprises a stiffener 3 placed between the outer skin and the lining 2. The cover 100 comprises an absorption edge 111 corresponding to at least a part of the front edge 101 of the cover, located on either side of a middle zone 110 of said front edge 101 .
[00031] Le bord d’absorption 111 étant situé entre le raidisseur 3 et le bord avant 101 du capot, de sorte que la rigidité du capot dans une direction longitudinale, la direction longitudinale correspondant à la direction longitudinale X du véhicule une fois le capot 100 installé sur le véhicule, dans le sens du bord avant vers le bord arrière dudit capot 100, le long dudit bord d’absorption 111 , est plus faible que la rigidité dans cette direction longitudinale de la zone milieu 110 dudit bord avant 101 . [00032] Le raidisseur 3 disposé entre la peau externe du capot et la doublure 2 permet de rigidifier le capot 100 vis-à-vis des efforts aérodynamiques, en particulier lors du roulage du véhicule. Le raidisseur a notamment pour fonction d’empêcher des vibrations visibles de la peau externe du capot. The absorption edge 111 being located between the stiffener 3 and the front edge 101 of the bonnet, so that the rigidity of the bonnet in a longitudinal direction, the longitudinal direction corresponding to the longitudinal direction X of the vehicle once the bonnet 100 installed on the vehicle, in the direction from the front edge to the rear edge of said bonnet 100, along said absorption edge 111, is lower than the rigidity in this longitudinal direction of the middle zone 110 of said front edge 101 . [00032] The stiffener 3 arranged between the outer skin of the bonnet and the lining 2 makes it possible to stiffen the bonnet 100 with respect to aerodynamic forces, in particular when the vehicle is moving. The stiffener has the particular function of preventing visible vibrations of the outer skin of the bonnet.
[00033] Dans une variante de l’invention le raidisseur 3 comporte des pattes de fixation 32 s’étendant depuis un corps principal du raidisseur 3, en forme de plaque, en direction de la doublure 2. Le raidisseur 3 est fixé à la doublure 2 par clinchage aux extrémités des pattes de fixation 32. Le raidisseur 3 a aussi une fonction d’apporter des moyens d’absorption d’énergie lors d’un choc tête en vertical sur le capot, notamment dans la partie milieu 110 et à l’avant du capot. Les rigidités des pattes de fixation 32 sont choisies pour fléchir à partir d’un certain effort de sorte à absorber l’énergie d’un choc tête en vertical. [00034] Le raidisseur 3 est fixé à la peau externe par des zones de collage 31 . [00033] In a variant of the invention the stiffener 3 comprises fixing lugs 32 extending from a main body of the stiffener 3, in the form of a plate, in the direction of the lining 2. The stiffener 3 is fixed to the lining 2 by clinching at the ends of the fixing lugs 32. The stiffener 3 also has the function of providing energy absorption means during a vertical head impact on the hood, in particular in the middle part 110 and at the hood front. The rigidities of the fixing lugs 32 are chosen to bend from a certain force so as to absorb the energy of a vertical head impact. [00034] The stiffener 3 is fixed to the outer skin by bonding zones 31 .
[00035] Dans une variante de l’invention, le bord d’absorption 111 s’étend de part et d’autre d’une zone milieu 110 dudit bord avant 101 jusqu’aux bords latéraux 103, 104, du capot. [00035] In a variant of the invention, the absorption edge 111 extends on either side of a middle zone 110 of said front edge 101 as far as the side edges 103, 104 of the cover.
[00036] Dans cette variante les termes « jusqu’aux bords latéraux » signifient que les bords latéraux du bord d’absorption, c’est-à-dire les bords les plus éloignés transversalement de l’axe longitudinal au milieu du véhicule et situés en vis-à-vis des bords latéraux du capot 103, 104, sont au plus proche de la zone de fixation de la doublure avec la peau externe, par exemple par sertissage, mais sans gêner la fixation ou le sertissage de la doublure 2 avec la peau externe. [00036] In this variant, the terms "up to the side edges" mean that the side edges of the absorption edge, that is to say the edges furthest transversely from the longitudinal axis in the middle of the vehicle and located vis-à-vis the side edges of the cover 103, 104, are closest to the fixing zone of the liner with the outer skin, for example by crimping, but without interfering with the fixing or the crimping of the liner 2 with the outer skin.
[00037] Dans une autre variante, le bord d’absorption 111 s’étend de part et d’autre d’une zone milieu 110 dudit bord avant 101 « jusqu’à proximité » des bords latéraux 103, 104 du capot. Dans cette variante les termes « jusqu’à proximité » signifient que les extrémités latérales du raidisseur s’arrêtent dans la direction transversale lorsque la doublure 2 remonte vers le haut en direction de la peau externe, le capot 100 étant en position véhicule, de sorte à ce que le raidisseur 3 puisse jouer son rôle d’absorption d’énergie des chocs tête. [00037] In another variant, the absorption edge 111 extends on either side of a middle zone 110 of said front edge 101 "up to proximity" to the side edges 103, 104 of the cover. In this variant, the terms "up to proximity" mean that the lateral ends of the stiffener stop in the transverse direction when the lining 2 rises upwards in the direction of the outer skin, the cowl 100 being in the vehicle position, so so that the stiffener 3 can play its role of absorbing head impact energy.
[00038] Dans une variante de l’invention, la rigidité du bord d’absorption 111 , du bord avant101 au capot, décroit depuis la zone milieu 110 vers les bords latéraux 103, 104. [00038] In a variant of the invention, the rigidity of the absorption edge 111, from the front edge 101 to the cover, decreases from the middle zone 110 towards the side edges 103, 104.
[00039] Ainsi on favorise l’absorption d’énergie d’un choc fémur sur les parties latérales du capot de sorte à mieux protéger le piéton au choc fémur. En effet en situation d’accident réelle, les tentatives d’évitement de la part du véhicule et/ou du piéton lors de l’imminence d’un choc ont pour conséquence de renforcer les probabilités de choc fémur sur les côtés du bord avant 101 du capot de part et d’autre de la zone milieu 110 du bord avant 101 du capot. Ce qui rend d’autant plus intéressant le fait d’améliorer l’absorption d’énergie au choc fémur au niveau des côtés du bord avant 101 du capot de part et d’autre de la zone milieu 110, ceci dans le but de mieux protéger le piéton. [00039] This promotes the absorption of energy from a femur impact on the side parts of the cover so as to better protect the pedestrian from a femur impact. Indeed, in a real accident situation, avoidance attempts on the part of the vehicle and/or the pedestrian during the imminence of an impact have the consequence of reinforcing the probabilities of femur impact on the sides of the front edge 101 of the cover on either side of the middle zone 110 of the front edge 101 of the cover. This makes it all the more interesting to improve the energy absorption at the femur impact at the level of the sides of the front edge 101 of the cowl on either side of the middle zone 110, this with the aim of better protect the pedestrian.
[00040] Dans une variante de l’invention, le raidisseur 3 comporte un bord avant 301 s’étendant du côté du bord avant du capot 101 , comportant une partie centrale 310 et deux parties latérales 311 disposées de part et d’autre de la partie centrale 310, la partie centrale 310 dudit bord avant du raidisseur 301 étant disposée plus proche du bord avant du capot que les deux parties latérales 311 du bord avant du capot, la partie centrale étant en vis-à-vis de la zone milieu 110. [00040] In a variant of the invention, the stiffener 3 comprises a front edge 301 extending from the side of the front edge of the cover 101, comprising a central part 310 and two side parts 311 arranged on either side of the central part 310, the central part 310 of said front edge of the stiffener 301 being arranged closer to the front edge of the bonnet than the two lateral parts 311 of the front edge of the bonnet, the central part being opposite the middle zone 110.
[00041] Ainsi en éloignant du bord avant du capot, les parties latérales 311 du raidisseur 3 situées de part et d’autre de la zone milieu du capot, la rigidité dans la direction longitudinale du capot est diminuée en vis-à-vis de ces parties latérales 311 de sorte à favoriser une course d’absorption longitudinale en particulier lors d’un choc fémur. [00041] Thus by moving away from the front edge of the cowl, the side parts 311 of the stiffener 3 located on either side of the middle zone of the cowl, the rigidity in the longitudinal direction of the cowl is reduced vis-à-vis these lateral parts 311 so as to promote a longitudinal absorption stroke in particular during a femur impact.
[00042] Dans une variante de l’invention, les deux parties latérales du raidisseur 311 s’étendent jusqu’aux bords latéraux 103, 104 du capot. [00042] In a variant of the invention, the two side parts of the stiffener 311 extend as far as the side edges 103, 104 of the cover.
[00043] Dans cette variante les termes « jusqu’aux bords latéraux » signifie que les extrémités latérales des parties latérales 311 du raidisseur 3 , c’est-à-dire les extrémités latérales des parties 311 du raidisseur 3 les plus éloignées transversalement de l’axe longitudinal au milieu du véhicule et situés en vis-à-vis des bords latéraux 103, 104 du capot, sont au plus proche de la zone de fixation de la doublure avec la peau externe, par exemple par sertissage, mais sans gêner la fixation ou le sertissage de la doublure avec la peau externe, en étant à quelques centimètres de la zone de sertissage, par exemple à moins de dix centimètres, de préférence à moins de cinq centimètres, des bords latéraux du capot. In this variant, the terms "up to the side edges" means that the side ends of the side parts 311 of the stiffener 3, that is to say the side ends of the parts 311 of the stiffener 3 furthest transversely from the longitudinal axis in the middle of the vehicle and located vis-à-vis the side edges 103, 104 of the bonnet, are as close as possible to the zone for fixing the lining with the outer skin, for example by crimping, but without interfering with the fixing or crimping the liner with the outer skin, being a few centimeters from the crimping zone, for example less than ten centimeters, preferably less than five centimeters, from the side edges of the cover.
[00044] Dans cette variante de l’invention, des zones de fixation 31 du raidisseur par collage à la peau externe du capot sont situées à proximité des extrémités latérales du raidisseur 3 s’approchant ainsi au plus près de la zone de sertissage de la doublure à la peau externe, de sorte à empêcher les vibrations de la peau externe du capot 100 sous des efforts aérodynamiques lorsque le véhicule est en roulage. [00044] In this variant of the invention, zones 31 for fixing the stiffener by bonding to the outer skin of the cowl are located close to the lateral ends of the stiffener 3 thus approaching as close as possible to the crimping zone of the lining to the outer skin, so as to prevent vibrations of the outer skin of the hood 100 under aerodynamic forces when the vehicle is moving.
[00045] Dans une variante de l’invention, le capot 100 comprend un fil de gâche fixé sur la doublure 2 en vis-à-vis de la zone 110 milieu du bord avant 101 du capot. [00045] In a variant of the invention, the cover 100 comprises a striker wire fixed to the lining 2 opposite the zone 110 in the middle of the front edge 101 of the cover.
[00046] Dans cette zone milieu 110 1a partie centrale 310 du raidisseur 3 est plus proche du bord avant 101 du capot que de part et d’autre de cette zone milieu 110. Ainsi la présence du raidisseur 3 plus près du bord avant dans cette zone milieu 110 du capot permet d’améliorer le comportement du capot 100 lors d’un choc tête en vertical sur le capot dans cette zone milieu 110, en apportant des moyens d’absorption d’énergie, et permettant aussi le limiter la course de la tête lors d’un choc tête en direction de la gâche et du crochet de serrure lors le capot est installé sur le véhicule. [00046] In this middle zone 110, the central part 310 of the stiffener 3 is closer to the front edge 101 of the cowl than on either side of this middle zone 110. Thus the presence of the stiffener 3 closer to the front edge in this middle zone 110 of the hood makes it possible to improve the behavior of the hood 100 during a vertical head impact on the hood in this middle zone 110, by providing means of energy absorption, and also allowing it to limit the stroke of head during a head impact in the direction of the striker and the lock hook when the bonnet is fitted to the vehicle.
[00047] Dans une autre variante de l’invention, le bord avant 301 de la partie centrale du raidisseur 310 est le plus proche possible de la zone de sertissage entre la doublure 2 et la peau externe dans la zone milieu 110, sans gêner les opérations de sertissage, de la doublure avec la peau externe. Dans cette autre variante une zone de collage entre le raidisseur 3 et la peau externe se situe en limite du bord avant de la partie centrale 310 du raidisseur. Ainsi le raidisseur par sa fixation par collage à la peau externe en zone milieu 110 du capot à l’avant du capot contribue à améliorer le comportement et l’absorption d’énergie en limitant la course de la tête et ce lors d’un choc tête en vertical dans ladite zone milieu 110. In another variant of the invention, the front edge 301 of the central part of the stiffener 310 is as close as possible to the crimping zone between the liner 2 and the outer skin in the middle zone 110, without interfering with the crimping operations, of the liner with the outer skin. In this other variant, a bonding zone between the stiffener 3 and the outer skin is located at the limit of the front edge of the central part 310 of the stiffener. Thus the stiffener by its attachment by gluing to the outer skin in the middle zone 110 of the bonnet at the front of the bonnet contributes to improving the behavior and the absorption of energy by limiting the travel of the head and this during an impact. head vertically in said middle zone 110.
[00048] Dans une variante de l’invention, les parties latérales 311 du bord avant du raidisseur 3 comportent de chaque côté de la partie centrale, au moins deux segments S1 , S2, un premier segment S1 relié à la partie centrale 310 et un deuxième segment S2 entre le premier segment et le bord latéral du capot, le bord avant du raidisseur dans le deuxième segment S2 étant plus proche du bord arrière du capot 100 que le bord avant du raidisseur dans le premier segment S1 . [00048] In a variant of the invention, the lateral parts 311 of the front edge of the stiffener 3 comprise, on each side of the central part, at least two segments S1, S2, a first segment S1 connected to the central part 310 and a second segment S2 between the first segment and the side edge of the cover, the front edge of the stiffener in the second segment S2 being closer to the rear edge of the cover 100 than the front edge of the stiffener in the first segment S1.
[00049] Ainsi le bord avant 301 du raidisseur a une forme en escaliers, avec chaque marche comportant un segment disposée plus près du bord arrière du capot que la précédente plus proche de la partie centrale 310 du raidisseur. [00049] Thus the front edge 301 of the stiffener has a staircase shape, with each step comprising a segment arranged closer to the rear edge of the cowl than the previous one closer to the central part 310 of the stiffener.
[00050] Dans une variante de l’invention, le raidisseur 3 comporte au niveau de chaque segment une patte de fixation 32, s’étendant en direction de la doublure 2, avec l’extrémité de la patte de fixation 32 distale du corps du raidisseur qui est par exemple fixée par clinchage à la doublure [00050] In a variant of the invention, the stiffener 3 comprises at the level of each segment a fixing lug 32, extending in the direction of the lining 2, with the end of the fixing lug 32 distal from the body of the stiffener which is for example fixed by clinching to the lining
[00051] Dans une variante de l’invention, le bord avant du raidisseur 3 comporte : [00051] In a variant of the invention, the front edge of the stiffener 3 comprises:
Une première portion de liaison L1 entre le bord avant en partie centrale du raidisseur et le premier segment S1 , A first connecting portion L1 between the front edge in the central part of the stiffener and the first segment S1,
Une deuxième portion de liaison L2 entre le premier segment S1 et le deuxième segment S2, chaque portion de liaison L1 , L2, forme un angle (a1 , a2) aigue compris entre zéro degré et soixante-quinze degrés par rapport un plan longitudinal et vertical du véhicule lorsque le capot 100 est installé sur ledit véhicule, le sommet de l’angle correspondant au point de chaque portion de liaison le plus en proche du bord avant du capot. L’angle entre chaque portion de liaison et un plan longitudinal et vertical du véhicule est donc aigu et ouvert en direction de l’arrière du véhicule. A second connecting portion L2 between the first segment S1 and the second segment S2, each connecting portion L1, L2, forms an acute angle (a1, a2) between zero degrees and seventy-five degrees with respect to a longitudinal and vertical plane of the vehicle when the bonnet 100 is installed on said vehicle, the apex of the angle corresponding to the point of each connecting portion closest to the front edge of the hood. The angle between each connecting portion and a longitudinal and vertical plane of the vehicle is therefore acute and open towards the rear of the vehicle.
[00052] Ainsi chaque marche comporte successivement en partant de la partie centrale du raidisseur une portion de liaison suivi d’un segment, ce qui forme ainsi une marche. Cette succession de marches contribue de façon simple à maintenir le bord avant 311 du raidisseur à bonne distance du bord avant du capot, et à favoriser une course d’absorption en longitudinal lors d’un choc piéton, en particulier pour un choc fémur. [00052] Thus each step comprises successively, starting from the central part of the stiffener, a connecting portion followed by a segment, which thus forms a step. This succession of steps contributes in a simple way to keeping the front edge 311 of the stiffener at a good distance from the front edge of the bonnet, and to promote a longitudinal absorption stroke during a pedestrian impact, in particular for a femur impact.
[00053] Dans une variante de réalisation de l’invention, la dimension du raidisseur suivant la direction longitudinale se réduit en s’éloignant de la partie centrale vers les bords latéraux 103, 104 du capot. [00053] In a variant embodiment of the invention, the dimension of the stiffener in the longitudinal direction is reduced as it moves away from the central part towards the side edges 103, 104 of the cover.
[00054] Ainsi la rigidité dans la direction longitudinale du raidisseur 3 diminue en fonction de la distance latérale à la partie centrale 310, c’est-à-dire en se rapprochant des bords latéraux 103, 104, du capot, ce qui contribue à diminuer la rigidité longitudinale du capot en fonction de l’éloignement à la zone milieu du capot et à favoriser une course d’absorption en longitudinal lors d’un choc piéton, en particulier pour un choc fémur. [00054] Thus the rigidity in the longitudinal direction of the stiffener 3 decreases as a function of the lateral distance to the central part 310, that is to say by approaching the side edges 103, 104, of the cowl, which contributes to to reduce the longitudinal rigidity of the bonnet as a function of the distance from the middle zone of the bonnet and to promote a longitudinal absorption stroke during a pedestrian impact, in particular for a femur impact.
[00055] Dans une variante particulière de l’invention, telle que représentée en figure 3, le raidisseur 3 comporte une première portion de liaison L1 sur le bord avant du raidisseur 23 commençant à une distance d1 de l’ordre de 180millimètres à 190millimètres en transversal par rapport au milieu du bord avant 101 du capot, cette première portion faisant un angle b1 proche de 50° par rapport à un plan longitudinal et vertical, dans une sous-variante b1 est égal à 54°. Cette première portion de liaison L1 est suivie d’un premier segment S1 faisant un angle a1 proche de à 80°par rapport à un plan longitudinal et vertical, dans une sous-variante a1 est égal à 85°. Dans cette variante particulière de l’invention, l’extrémité du premier segment S1 la plus proche du bord latéral du capot est à environ une distance d2 de l’ordre de 450 millimètres par rapport au milieu du bord avant 101 du capot, dans une sous-variante d2 est égal à 430 millimètres. Ce premier segment S1 est suivi d’une deuxième portion L2 de liaison faisant un angle b2 proche de 50° par rapport à un plan longitudinal et vertical, dans une sous-variante b2 est égal à 44°. Cette deuxième portion de liaison L2 est suivie d’un deuxième segment S2 faisant un angle a2 proche de 75°par rapport à un plan longitudinal et vertical, dans une sus-variante a2 est égal à 80°. In a particular variant of the invention, as shown in Figure 3, the stiffener 3 comprises a first connecting portion L1 on the front edge of the stiffener 23 starting at a distance d1 of the order of 180 millimeters to 190 millimeters in transverse with respect to the middle of the front edge 101 of the cover, this first portion forming an angle b1 close to 50° with respect to a longitudinal and vertical plane, in a sub-variant b1 is equal to 54°. This first connecting portion L1 is followed by a first segment S1 making an angle a1 close to 80° with respect to a longitudinal and vertical plane, in a sub-variant a1 is equal to 85°. In this particular variant of the invention, the end of the first segment S1 closest to the side edge of the bonnet is at approximately a distance d2 of the order of 450 millimeters with respect to the middle of the front edge 101 of the bonnet, in a sub-variant d2 is equal to 430 millimeters. This first segment S1 is followed by a second connecting portion L2 forming an angle b2 close to 50° with respect to a longitudinal and vertical plane, in a sub-variant b2 is equal to 44°. This second connecting portion L2 is followed by a second segment S2 making an angle a2 close to 75° with respect to a longitudinal and vertical plane, in an above-variant a2 is equal to 80°.
[00056] L’invention concerne aussi un véhicule comportant un capot selon l’invention. The invention also relates to a vehicle comprising a bonnet according to the invention.

Claims

REVENDICATIONS
[Revendication 1] Capot (100) avant pour véhicule automobile comprenant : une peau externe et une doublure (2) comprenant une paroi de fond (21 ) écartée de la peau externe, le capot (100) comportant un bord avant (101 ) et un bord arrière opposé, deux bords latéraux (103, 104) reliant les bords avant et arrière de part et d’autre du capot, un raidisseur (3) entre la peau externe et la doublure (2), ledit capot (100) étant caractérisé en ce que il comporte un bord d’absorption (111 ) correspondant à au moins une partie du bord avant (101 ) du capot situé de part et d’autre d’une zone milieu (110) dudit bord avant (101 ), le bord d’absorption (111 ) étant entre le raidisseur (3) et le bord avant (101 ) du capot, de sorte que la rigidité du bord d’absorption dans une direction longitudinale, la direction longitudinale correspondant à la direction longitudinale du véhicule une fois le capot (100) installé sur le véhicule, dans le sens du bord avant (101 ) vers le bord arrière dudit capot (100), le long dudit bord d’absorption (111 ) , est plus faible que la rigidité, dans cette direction longitudinale, de la zone milieu (110) dudit bord avant (101 ). [Claim 1] Front bonnet (100) for a motor vehicle comprising: an outer skin and a lining (2) comprising a bottom wall (21) spaced from the outer skin, the bonnet (100) comprising a front edge (101) and an opposite rear edge, two side edges (103, 104) connecting the front and rear edges on either side of the hood, a stiffener (3) between the outer skin and the lining (2), said hood (100) being characterized in that it comprises an absorption edge (111) corresponding to at least part of the front edge (101) of the cover located on either side of a middle zone (110) of said front edge (101), the absorption edge (111) being between the stiffener (3) and the front edge (101) of the bonnet, so that the rigidity of the absorption edge in a longitudinal direction, the longitudinal direction corresponding to the longitudinal direction of the vehicle once the hood (100) is installed on the vehicle, in the direction of the front edge (101) towards the rear edge of said hood (100), along said absorption edge (111), is lower than the rigidity, in this longitudinal direction, of the middle zone (110) of said front edge (101).
[Revendication2] Capot avant selon la revendication 1 dans lequel le bord d’absorption (111 ) s’étend de part et d’autre de la zone milieu (110) dudit bord avant (101 ) jusqu’aux bords latéraux (103, 104) du capot. [Claim 2] Front cover according to Claim 1, in which the absorption edge (111) extends on either side of the middle zone (110) of the said front edge (101) as far as the side edges (103, 104 ) of the hood.
[Revendications] Capot avant selon la revendication 2 dans lequel la rigidité du bord d’absorption (111 ) décroit depuis la zone milieu (110) vers les bords latéraux (103, 104). [Claims] Front cover according to Claim 2, in which the rigidity of the absorption edge (111) decreases from the middle zone (110) towards the side edges (103, 104).
[Revendication4] Capot selon un des revendications 1 à 3, dont le raidisseur (3) comporte [Claim 4] Cover according to one of Claims 1 to 3, the stiffener (3) of which comprises
- un bord avant (301 ) s’étendant du côté du bord avant (101 ) du capot, comportant une partie centrale (310) et deux parties latérales (311 ) disposées de part et d’autre de la partie centrale (310), la partie centrale (310) dudit bord avant du raidisseur (3) étant disposée plus proche du bord avant du capot (3) que les deux parties latérales (311 ) par rapport au bord avant, du capot, la partie centrale (310) étant en vis-à-vis de la zone milieu (110). - a front edge (301) extending from the side of the front edge (101) of the cover, comprising a central part (310) and two side parts (311) arranged on either side of the central part (310), the central part (310) of the said front edge of the stiffener (3) being arranged closer to the front edge of the cover (3) than the two lateral parts (311) relative to the front edge of the cover, the central part (310) being opposite the middle zone (110).
[Revendications] Capot (100) selon la revendication précédente, dans lequel les deux parties latérales (311 ) s’étendent jusqu’aux bords latéraux (103, 104) du capot. [Revendications] Capot (100) selon une des revendications 4 ou 5, comprenant un fil de gâche fixé sur la doublure (2) en vis-à-vis en vis-à-vis de la partie centrale (310) du raidisseur (3). [Claims] Cover (100) according to the preceding claim, in which the two lateral parts (311) extend as far as the side edges (103, 104) of the cover. [Claims] Cover (100) according to one of Claims 4 or 5, comprising a striker wire fixed to the lining (2) facing facing the central part (310) of the stiffener (3 ).
[Revendication?] Capot (100) selon une des revendications 4 à 6, dans lequel les parties latérales (311 ) du bord avant du raidisseur comportent de chaque côté de la partie centrale (310), au moins deux segments, un premier segment (S1 ) relié à la partie centrale (310) et un deuxième segment (S2) entre le premier segment (S1 ) et le bord latéral (103, 104) du capot, le bord avant du raidisseur (3) dans le deuxième segment (S2) étant disposé d’avantage vers le bord arrière du capot (100) que le bord avant du raidisseur (3) dans le premier segment (S1 ). [Claim?] Cover (100) according to one of Claims 4 to 6, in which the lateral parts (311) of the front edge of the stiffener comprise, on each side of the central part (310), at least two segments, a first segment ( S1) connected to the central part (310) and a second segment (S2) between the first segment (S1) and the side edge (103, 104) of the cover, the front edge of the stiffener (3) in the second segment (S2 ) being arranged more towards the rear edge of the cover (100) than the front edge of the stiffener (3) in the first segment (S1).
[Revendications] Capot selon la revendication précédente, dans lequel le bord avant du raidisseur (3) comporte [Claims] Cover according to the preceding claim, in which the front edge of the stiffener (3) comprises
Une première portion de liaison (L1 ) entre le bord avant de la partie centrale (310) du raidisseur (3) et le premier segment (S1 ), A first connecting portion (L1) between the front edge of the central part (310) of the stiffener (3) and the first segment (S1),
Une deuxième portion de liaison (L2) entre le premier segment (S1 ) et le deuxième segment (S2), A second connecting portion (L2) between the first segment (S1) and the second segment (S2),
Chaque portion de liaison (L1 , L2) forme un angle (a1 , a2) aigue compris entre zéro degré et soixante degrés par rapport un plan longitudinal et vertical du véhicule lorsque le capot est installé sur ledit véhicule, le sommet de l’angle correspondant au point de chaque portion de liaison (L1 , L2) le plus en proche du bord avant (101 ) du capot (100). Each connecting portion (L1, L2) forms an acute angle (a1, a2) between zero degrees and sixty degrees relative to a longitudinal and vertical plane of the vehicle when the bonnet is installed on said vehicle, the apex of the corresponding angle at the point of each connecting portion (L1, L2) closest to the front edge (101) of the cover (100).
[Revendication9] Capot (100) suivant l’une des revendications 4 à 9, dans lequel la dimension du raidisseur (3) suivant la direction longitudinale se réduit en s’éloignant de la zone milieu (110) vers les bords latéraux (103, 104) du capot (100). [Revendication ] Véhicule comportant un capot (100) selon l’une des revendications précédentes. [Claim 9] Hood (100) according to one of Claims 4 to 9, in which the dimension of the stiffener (3) in the longitudinal direction decreases away from the middle zone (110) towards the lateral edges (103, 104) of the cover (100). [Claim] Vehicle comprising a bonnet (100) according to one of the preceding claims.
EP21806313.9A 2020-11-06 2021-10-20 Vehicle hood Pending EP4240636A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2011416A FR3116038A1 (en) 2020-11-06 2020-11-06 VEHICLE HOOD
PCT/FR2021/051840 WO2022096796A1 (en) 2020-11-06 2021-10-20 Vehicle hood

Publications (1)

Publication Number Publication Date
EP4240636A1 true EP4240636A1 (en) 2023-09-13

Family

ID=75953884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21806313.9A Pending EP4240636A1 (en) 2020-11-06 2021-10-20 Vehicle hood

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Country Link
EP (1) EP4240636A1 (en)
FR (1) FR3116038A1 (en)
WO (1) WO2022096796A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29924443U1 (en) * 1998-10-07 2003-03-27 Volkswagen Ag Bonnet, in particular, for covering motor of motor vehicle comprises central bonnet section which is only slightly arched for added flexibility, and adjoins arched side sections resting on support elements
FR2914266B1 (en) * 2007-03-28 2010-01-08 Peugeot Citroen Automobiles Sa HOOD WITH REINFORCED LINING FOR VEHICLE.
EP2008884A1 (en) * 2007-06-28 2008-12-31 Ford Global Technologies, LLC Bonnet for Motor Vehicles
DE102009005910A1 (en) * 2009-01-23 2010-07-29 GM Global Technology Operations, Inc., Detroit Front bonnet for motor vehicle, has inner shell that limits hollow space in front edge area of bonnet, and roof stick supporting outer shell extending in width direction of bonnet in hollow space
FR2946946B1 (en) * 2009-06-23 2012-10-19 Peugeot Citroen Automobiles Sa VEHICLE COVER COMPRISING A FUSE PART IN THE EVENT OF REPAIR SHOCK
DE102013014203A1 (en) * 2013-08-26 2015-02-26 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Front hood for a motor vehicle

Also Published As

Publication number Publication date
FR3116038A1 (en) 2022-05-13
WO2022096796A1 (en) 2022-05-12

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