WO2019180337A1 - Front part of a vehicle, offering improved stability in the event of a front impact - Google Patents

Front part of a vehicle, offering improved stability in the event of a front impact Download PDF

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Publication number
WO2019180337A1
WO2019180337A1 PCT/FR2019/050454 FR2019050454W WO2019180337A1 WO 2019180337 A1 WO2019180337 A1 WO 2019180337A1 FR 2019050454 W FR2019050454 W FR 2019050454W WO 2019180337 A1 WO2019180337 A1 WO 2019180337A1
Authority
WO
WIPO (PCT)
Prior art keywords
gearbox
vehicle
engine
front part
shock absorber
Prior art date
Application number
PCT/FR2019/050454
Other languages
French (fr)
Inventor
Marc Peru
Jérôme MINELLI
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
Priority to EP19717511.0A priority Critical patent/EP3768576A1/en
Publication of WO2019180337A1 publication Critical patent/WO2019180337A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/04—Arrangement or mounting of internal-combustion or jet-propulsion units with the engine main axis, e.g. crankshaft axis, transversely to the longitudinal centre line of the vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K2005/003—Arrangement or mounting of internal-combustion or jet-propulsion units the internal combustion or jet propulsion unit is arranged between the front and the rear axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection

Definitions

  • the present invention relates to a front part of a vehicle which comprises a motor compartment in which is positioned a motor and a gearbox which has improved stability in case of front impact.
  • It relates more particularly to a gearbox which is positioned laterally to the engine, with the front wall of the gearbox which is positioned behind the front wall of the engine, defining a volume at least partially empty.
  • a front part of a vehicle which comprises an engine compartment in which is positioned a motor and a gearbox, where the gearbox is positioned laterally to the engine, with the front wall of the gearbox. which is positioned behind the front wall of the engine, defining a volume at least partially empty.
  • one of the tests is to project the vehicle at high speed against a deformable barrier, the goal being that the deformable portion of the barrier is deformed in the most homogeneous manner possible, without hard spots.
  • the barrier switches to the side of the gearbox, destabilizing the front structure of the vehicle, modifying its impact resistance and creating a non deformation.
  • the present invention aims to overcome these problems and to provide a front part of a vehicle which comprises a motor compartment in which is positioned a motor and a gearbox, which allows laterally stabilize such a shock against a deformable barrier without degrade a shock against a rigid wall.
  • the subject of the invention is a front part of a vehicle which comprises an engine compartment in which is positioned a motor and a gearbox, the gearbox being positioned laterally to the engine along the same alignment oriented along the transverse axis of the vehicle, with the front wall of the gearbox which is positioned behind the front wall of the engine, defining a volume at least partially empty, such that it comprises a shock absorber positioned in front of the front wall the gearbox, the absorber being adapted to at least partially fill said volume.
  • the absorber extends over a height greater than the height of the gearbox, said height of the absorber remaining lower than the height of the engine.
  • a reinforcing element may preferably be positioned between an upper wall of the gearbox and the part of the absorber which extends above the gearbox.
  • the reinforcing element is formed in a metallic material, preferably steel and has a thickness of between 2 mm and 3 mm, preferably said thickness is 2.5 mm.
  • the shock absorber comprises a honeycomb structure which comprises cells.
  • the cells are open at both ends and are oriented in the longitudinal direction of the vehicle.
  • the cells have side walls whose thickness is between 2 and 4 mm, preferably said thickness being 3 mm.
  • the cells are formed of a soft metal material such as aluminum, a plastic material or composite materials.
  • the shock absorber may have a width along the longitudinal axis of the vehicle which is between 150 and 250 mm, said width preferably being 200 mm and the shock absorber may have a height along the vertical axis of the vehicle which is between 250 and 350 mm, said width preferably being 300 mm.
  • the present invention also relates to a vehicle which comprises such a front part.
  • Figure 1 shows a partial view of the front part of a vehicle, which comprises a motor compartment in which is positioned a motor and a gearbox;
  • Figures 2 and 3 show perspective views of the motor assembly and gearbox as positioned in the engine compartment and which comprises, according to the invention, a shock absorber.
  • the term front designates a positioning towards the front of the vehicle and the term back designates a positioning towards the rear of the vehicle.
  • the longitudinal axis corresponds to the normal axis of circulation of the vehicle and the axis transverse to an axis perpendicular to the longitudinal axis included in the plane of movement of the vehicle.
  • FIG. 1 represents a partial view of the front part 1 of a vehicle, which comprises a motor compartment 2 in which an engine is positioned.
  • the gearbox 4 is positioned laterally to the engine 3, in the same alignment aligned along the transverse axis of the vehicle.
  • the gearbox 4 has a smaller volume than the engine 4 so that the spacing left free around the gearbox is generally used to position different components.
  • Above the gearbox 4 is for example positioned electronic boxes 5. According to the invention, such a spacing is also present in front of the gearbox
  • Figures 2 and 3 show perspective views of the engine assembly 3 and gearbox 4 as positioned in the engine compartment and which comprises, according to the invention, a shock absorber 6.
  • the transverse axis of the vehicle is represented by the Y axis
  • the longitudinal axis of the vehicle is represented by the X axis
  • the Z axis represents the vertical axis of the vehicle.
  • the gearbox 4 is shown positioned laterally to the engine 3, along the same transverse axis Y.
  • the engine 3 and the gearbox 4 are incompressible in the event of an impact on the front of the vehicle.
  • On the front wall 31 of the engine 3 are positioned various accessories of the engine 3 such as the turbocharger 33, the pollution control device 34, the compressor of the air conditioning 35 or the alternator 36.
  • the shock absorber 6 is positioned in front of the front wall 41 of the gearbox 4 so as to make up all or part of the dimensioning difference along the longitudinal axis X between the foremost part of the engine 3 and engine accessories 3 and the front wall 41 of the gearbox 4.
  • the absorber 6 also has a height adapted for an upper portion 61 of the shock absorber 6 extends above the box of 4 speeds up to a height that is substantially that of the engine 4. Such a height depends on the size of the engine 3 and is generally between 250 and 350 mm. More particularly, in the exemplary embodiment as shown, the height of the shock absorber is taken substantially equal to 300 mm.
  • a holding device 7 forms a reinforcement for the upper part 61 of the shock absorber 6.
  • the holding device 7 has a square shape and is interposed between the upper part of the gearbox 3 and the upper part 61 of the shock absorber 6.
  • the holding device 7 is generally made of metal with a thickness of the walls which is between 2 and 3 mm, allowing it to withstand shock by bending, but without breaking.
  • the holding device 7 is made of steel and has a thickness of these walls of 2.5 mm. At the end of shock, it may still be interesting that the holding device 7 bends without breaking, which allows a metal such as steel.
  • the holding device 7 is screwed onto the gearbox 3.
  • the shock absorber 6, depending on the size of the gearbox 6, has a width along the transverse axis Y which is between 150 and 250 mm. In the exemplary embodiment, the width of the shock absorber is about 200 mm.
  • the shock absorber 6 comprises a honeycomb structure with cavities 62 which are oriented along the longitudinal axis X.
  • the cells 62 have walls whose thickness is between 2 and 4 mm and may be made of different materials. such as soft metal materials such as aluminum, plastics or composite materials. In the exemplary embodiment, the thickness is 3 mm and is made of composite material which comprises short fibers.
  • the shock absorber 6 forms with the engine 3, a homogeneous assembly that best distributes the deformation of the parts of the vehicle that come in contact with this set.
  • the shock absorber 6 must have good resistance to impact against an obstacle that deforms like a barrier, precisely to homogenize the deformation of the barrier, but must be able to crash in the case of an impact against a rigid structure like a wall. Such behavior is suitable for soft metal materials such as aluminum, plastics or composite materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)
  • Vibration Dampers (AREA)

Abstract

The invention relates to a front part of a vehicle which comprises an engine compartment (2) in which an engine (3) and a gearbox (4) are disposed, the gearbox (4) being positioned laterally in relation to the engine (3), both in alignment with the transverse axis (Y) of the vehicle; the front wall (41) of the gearbox (4) is positioned set back from the front wall (31) of the engine (3), defining an at least partly empty space. The front part is characterized in that it comprises a shock absorber (6) disposed ahead of the front wall (31) of the gearbox (3), said shock absorber (6) being adapted to at least partly fill up the space.

Description

PARTIE AVANT D’UN VEHICULE PRESENTANT UNE STABILITE AMELIOREE EN CAS DE CHOC AVANT  FRONT PART OF A VEHICLE HAVING IMPROVED STABILITY IN THE EVENT OF A FIRST SHOCK
La présente invention concerne une partie avant d’un véhicule qui comporte un compartiment moteur dans lequel est positionné un moteur et une boîte de vitesses qui présente une stabilité améliorée en cas de choc avant. The present invention relates to a front part of a vehicle which comprises a motor compartment in which is positioned a motor and a gearbox which has improved stability in case of front impact.
Elle concerne plus particulièrement une boîte de vitesses qui est positionnée latéralement au moteur, avec la paroi frontale de la boîte de vitesses qui est positionnée en arrière de la paroi frontale du moteur, définissant un volume au moins partiellement vide. It relates more particularly to a gearbox which is positioned laterally to the engine, with the front wall of the gearbox which is positioned behind the front wall of the engine, defining a volume at least partially empty.
Il est connu d’avoir une partie avant d’un véhicule qui comporte un compartiment moteur dans lequel est positionné un moteur et une boîte de vitesses, où la boîte de vitesses est positionnée latéralement au moteur, avec la paroi frontale de la boîte de vitesses qui est positionnée en arrière de la paroi frontale du moteur, définissant un volume au moins partiellement vide. Lors de l’homologation du véhicule, un des tests consiste à projeter le véhicule à vitesse élevée contre une barrière déformable, le but étant que la partie déformable de la barrière soit déformée de la manière la plus homogène possible, sans points durs. Mais comme la partie frontale de la boîte de vitesses est positionnée plus en arrière que la partie frontale du moteur, la barrière bascule du côté de la boîte de vitesses, déstabilisant la structure avant du véhicule, modifiant sa résistance au choc et créant une déformation non homogène de la barrière. En même temps, un choc contre un mur rigide ne doit pas être dégradé par la présence d’un nouveau renfort qui permettrait d’éviter un tel basculement de la barrière. La présente invention a pour objectif de pallier ces problèmes et de proposer une partie avant d’un véhicule qui comporte un compartiment moteur dans lequel est positionné un moteur et une boîte de vitesses, qui permet de stabiliser latéralement un tel choc contre une barrière déformable sans dégrader un choc contre un mur rigide. Plus particulièrement, l'invention a pour objet une partie avant d’un véhicule qui comporte un compartiment moteur dans lequel est positionné un moteur et une boîte de vitesses, la boîte de vitesses étant positionnée latéralement au moteur suivant un même alignement orienté suivant l’axe transversal du véhicule, avec la paroi frontale de la boîte de vitesses qui est positionnée en arrière de la paroi frontale du moteur, définissant un volume au moins partiellement vide, telle qu’elle comporte un absorbeur de chocs positionné en avant de la paroi frontale la boîte de vitesses, l’absorbeur étant adapté pour combler au moins en partie ledit volume. It is known to have a front part of a vehicle which comprises an engine compartment in which is positioned a motor and a gearbox, where the gearbox is positioned laterally to the engine, with the front wall of the gearbox. which is positioned behind the front wall of the engine, defining a volume at least partially empty. During the approval of the vehicle, one of the tests is to project the vehicle at high speed against a deformable barrier, the goal being that the deformable portion of the barrier is deformed in the most homogeneous manner possible, without hard spots. But as the front end of the gearbox is positioned further back than the front of the engine, the barrier switches to the side of the gearbox, destabilizing the front structure of the vehicle, modifying its impact resistance and creating a non deformation. homogeneous barrier. At the same time, a shock against a rigid wall must not be degraded by the presence of a new reinforcement that would prevent such a tilting of the barrier. The present invention aims to overcome these problems and to provide a front part of a vehicle which comprises a motor compartment in which is positioned a motor and a gearbox, which allows laterally stabilize such a shock against a deformable barrier without degrade a shock against a rigid wall. More particularly, the subject of the invention is a front part of a vehicle which comprises an engine compartment in which is positioned a motor and a gearbox, the gearbox being positioned laterally to the engine along the same alignment oriented along the transverse axis of the vehicle, with the front wall of the gearbox which is positioned behind the front wall of the engine, defining a volume at least partially empty, such that it comprises a shock absorber positioned in front of the front wall the gearbox, the absorber being adapted to at least partially fill said volume.
Selon une première caractéristique de l’invention, l’absorbeur se prolonge sur une hauteur supérieure à la hauteur de la boite de vitesse, ladite hauteur de l’absorbeur restant inférieure à la hauteur du moteur. Un élément de renfort pouvant préférentiellement être positionné entre une paroi supérieure de la boîte de vitesses et la partie de l’absorbeur qui s’étend au-dessus de la boîte de vitesses. L’élément de renfort est formé dans une matière métallique, préférentiellement en acier et présente une épaisseur comprise entre 2 mm et 3 mm, préférentiellement ladite épaisseur est de 2,5 mm. According to a first characteristic of the invention, the absorber extends over a height greater than the height of the gearbox, said height of the absorber remaining lower than the height of the engine. A reinforcing element may preferably be positioned between an upper wall of the gearbox and the part of the absorber which extends above the gearbox. The reinforcing element is formed in a metallic material, preferably steel and has a thickness of between 2 mm and 3 mm, preferably said thickness is 2.5 mm.
Selon une deuxième caractéristique de l’invention l’absorbeur de chocs comporte une structure en nids d’abeilles qui comporte des alvéoles. Les alvéoles sont ouvertes à leurs deux extrémités et sont orientées selon la direction longitudinale du véhicule. Les alvéoles présentent des parois latérales dont l’épaisseur est comprise entre 2 et 4 mm, préférentiellement ladite épaisseur étant de 3 mm. Les alvéoles sont formées dans une matière métallique tendre comme de l’aluminium, dans une matière plastique ou dans des matériaux composites. According to a second characteristic of the invention the shock absorber comprises a honeycomb structure which comprises cells. The cells are open at both ends and are oriented in the longitudinal direction of the vehicle. The cells have side walls whose thickness is between 2 and 4 mm, preferably said thickness being 3 mm. The cells are formed of a soft metal material such as aluminum, a plastic material or composite materials.
Selon un mode de réalisation de l’invention, l’absorbeur de chocs peut présenter une largeur selon l’axe longitudinal du véhicule qui est comprise entre 150 et 250 mm, ladite largeur étant préférentiellement de 200 mm et l’absorbeur de chocs peut présenter une hauteur selon l’axe vertical du véhicule qui est comprise entre 250 et 350 mm, ladite largeur étant préférentiellement de 300 mm. La présente invention concerne aussi un véhicule qui comporte une telle partie avant. According to one embodiment of the invention, the shock absorber may have a width along the longitudinal axis of the vehicle which is between 150 and 250 mm, said width preferably being 200 mm and the shock absorber may have a height along the vertical axis of the vehicle which is between 250 and 350 mm, said width preferably being 300 mm. The present invention also relates to a vehicle which comprises such a front part.
D’autres objets, caractéristiques et avantages de l’invention apparaîtront plus en détail à la lecture de la description qui suit, ainsi qu’à l’aide des dessins annexés, fournis à titre purement illustratif et non limitatif, parmi lesquels : Other objects, features and advantages of the invention will appear in more detail on reading the description which follows, and with the aid of the accompanying drawings, provided for purely illustrative and non-limiting purposes, among which:
• La figure 1 représente une vue partielle, de la partie avant d’un véhicule, qui comporte un compartiment moteur dans lequel est positionné un moteur et une boîte de vitesses ; et • Figure 1 shows a partial view of the front part of a vehicle, which comprises a motor compartment in which is positioned a motor and a gearbox; and
• Les figures 2 et 3 représentent des vues en perspective, de l’ensemble moteur et boîte de vitesses tel que positionné dans le compartiment moteur et qui comporte, selon l’invention, un absorbeur de chocs. • Figures 2 and 3 show perspective views of the motor assembly and gearbox as positioned in the engine compartment and which comprises, according to the invention, a shock absorber.
Dans la description détaillée de l’invention est utilisé un référentiel lié au sens normal de circulation d’un véhicule. Le terme avant désigne un positionnement vers l’avant du véhicule et le terme arrière désigne un positionnement vers l’arrière du véhicule. L’axe longitudinal correspond à l’axe normal de circulation du véhicule et l’axe transversal à un axe perpendiculaire à l’axe longitudinal compris dans le plan de déplacement du véhicule. In the detailed description of the invention is used a reference linked to the normal direction of circulation of a vehicle. The term front designates a positioning towards the front of the vehicle and the term back designates a positioning towards the rear of the vehicle. The longitudinal axis corresponds to the normal axis of circulation of the vehicle and the axis transverse to an axis perpendicular to the longitudinal axis included in the plane of movement of the vehicle.
La figure 1 représente une vue partielle de la partie avant 1 d’un véhicule, qui comporte un compartiment moteur 2 dans lequel est positionné un moteurFIG. 1 represents a partial view of the front part 1 of a vehicle, which comprises a motor compartment 2 in which an engine is positioned.
3 et une boîte de vitesses 4. La boîte de vitesses 4 est positionnée latéralement au moteur 3, suivant un même alignement aligné selon l’axe transversal du véhicule. La boîte de vitesses 4 présente un plus faible volume que le moteur 4 faisant que l’espacement laissé libre au tour de la boîte de vitesses sert généralement pour y positionner différents composants. Au-dessus de la boîte de vitesses 4 est par exemple positionné des boîtiers électroniques 5. Selon l’invention, un tel espacement est aussi présent en avant de la boîte de vitesses3 and a gearbox 4. The gearbox 4 is positioned laterally to the engine 3, in the same alignment aligned along the transverse axis of the vehicle. The gearbox 4 has a smaller volume than the engine 4 so that the spacing left free around the gearbox is generally used to position different components. Above the gearbox 4 is for example positioned electronic boxes 5. According to the invention, such a spacing is also present in front of the gearbox
4 et est utilisé pour y positionner un absorbeur de chocs, comme plus particulièrement expliqué dans la suite de la description. 4 and is used to position a shock absorber, as more particularly explained in the following description.
Les figures 2 et 3 représentent des vues en perspective de l’ensemble moteur 3 et boîte de vitesses 4 tel que positionné dans le compartiment moteur et qui comporte, selon l’invention, un absorbeur de chocs 6. L’axe transversal du véhicule est représenté par l’axe Y, l’axe longitudinale du véhicule est représenté par l’axe X et l’axe Z représente l’axe vertical du véhicule. La boîte de vitesses 4 est représenté positionnée latéralement au moteur 3, suivant le même axe transversal Y. Le moteur 3 et la boîte de vitesses 4 sont incompressibles en cas de choc sur l’avant du véhicule. Sur la paroi frontale 31 du moteur 3 sont positionnés différents accessoires du moteur 3 comme le turbocompresseur 33, le dispositif de dépollution 34, le compresseur de la climatisation 35 ou l’alternateur 36. Ces accessoires présentent aussi une forte rigidité faisant que, en cas de choc sur l’avant du véhicule, ces accessoires vont aussi difficilement s’écraser. L’amortisseur de choc 6 est positionné en avant de la paroi frontale 41 de la boîte de vitesses 4 de manière à rattraper tout ou partie de la différence de dimensionnement suivant l’axe longitudinal X entre la partie la plus en avant du moteur 3 et des accessoires du moteur 3 et la paroi frontale 41 de la boîte de vitesses 4. L’absorbeur 6 présente aussi une hauteur adaptée pour qu’une partie supérieure 61 de l’absorbeur de chocs 6 s’étend au- dessus de la boîte de vitesses 4, jusqu’à une hauteur qui est sensiblement celle du moteur 4. Une telle hauteur dépend de la taille du moteur 3 et est généralement comprise entre 250 et 350 mm. Plus particulièrement, dans l’exemple de mode de réalisation tel que représenté, la hauteur de l’absorbeur de chocs est prise sensiblement égale à 300 mm. Un dispositif de maintien 7 forme un renfort pour la partie supérieure 61 de l’absorbeur de chocs 6. Le dispositif de maintien 7 présente une forme en équerre et est interposé entre la partie supérieure de la boîte de vitesses 3 et la partie supérieure 61 de l’absorbeur de chocs 6. Le dispositif de maintien 7 est généralement réalisé en métal avec une épaisseur des parois qui est comprise entre 2 et 3 mm, lui permettant de résister à un choc en se pliant, mais sans se casser. Dans l’exemple de mode de réalisation, Le dispositif de maintien 7 est réalisé en acier et présente une épaisseur de ces parois de 2.5 mm. En fin de choc, il peut être tout de même intéressant que le dispositif de maintien 7 se plie sans rompre, ce que permet un métal tel que l’acier. Le dispositif de maintien 7 est vissé sur la boîte de vitesses 3. L’absorbeur de chocs 6, en fonction du dimensionnement de la boîte de vitesses 6, présente une largeur selon l’axe transversal Y qui est comprise entre 150 et 250 mm. Dans l’exemple de mode de réalisation, la largeur de l’absorbeur de chocs est d’environ 200 mm. L’absorbeur de chocs 6 comporte une structure en nid abeilles avec des alvéoles 62 qui sont orientées selon l’axe longitudinal X. Les alvéoles 62 présentent des parois dont l’épaisseur est comprise entre 2 et 4 mm et peuvent être réalisés dans différents matériaux tels que des matières métalliques tendres comme l’aluminium, des matières plastiques ou des matériaux composites. Dans l’exemple de mode de réalisation, l’épaisseur est de 3 mm et est réalisé en matériau composite qui comporte des fibres courtes. Lors d’un choc contre une barrière qui s’étend sur toute la hauteur de la face avant du véhicule, l’absorbeur de chocs 6 forme avec le moteur 3, un ensemble homogène qui répartit au mieux la déformation des parties du véhicule qui viennent en contact de cet ensemble. L’absorbeur de choc 6 doit présenter une bonne résistance à un choc contre un obstacle qui se déforme comme une barrière, justement pour homogénéifier la déformation de la barrière, mais doit pouvoir s’écraser dans le cas d’un choc contre une structure rigide comme un mur. Un tel comportement est adapté à des matières métalliques tendres comme l’aluminium, des matières plastiques ou des matériaux composites. Figures 2 and 3 show perspective views of the engine assembly 3 and gearbox 4 as positioned in the engine compartment and which comprises, according to the invention, a shock absorber 6. The transverse axis of the vehicle is represented by the Y axis, the longitudinal axis of the vehicle is represented by the X axis and the Z axis represents the vertical axis of the vehicle. The gearbox 4 is shown positioned laterally to the engine 3, along the same transverse axis Y. The engine 3 and the gearbox 4 are incompressible in the event of an impact on the front of the vehicle. On the front wall 31 of the engine 3 are positioned various accessories of the engine 3 such as the turbocharger 33, the pollution control device 34, the compressor of the air conditioning 35 or the alternator 36. These accessories also have a high rigidity that, in case shock on the front of the vehicle, these accessories will also hard to crash. The shock absorber 6 is positioned in front of the front wall 41 of the gearbox 4 so as to make up all or part of the dimensioning difference along the longitudinal axis X between the foremost part of the engine 3 and engine accessories 3 and the front wall 41 of the gearbox 4. The absorber 6 also has a height adapted for an upper portion 61 of the shock absorber 6 extends above the box of 4 speeds up to a height that is substantially that of the engine 4. Such a height depends on the size of the engine 3 and is generally between 250 and 350 mm. More particularly, in the exemplary embodiment as shown, the height of the shock absorber is taken substantially equal to 300 mm. A holding device 7 forms a reinforcement for the upper part 61 of the shock absorber 6. The holding device 7 has a square shape and is interposed between the upper part of the gearbox 3 and the upper part 61 of the the shock absorber 6. The holding device 7 is generally made of metal with a thickness of the walls which is between 2 and 3 mm, allowing it to withstand shock by bending, but without breaking. In the exemplary embodiment, the holding device 7 is made of steel and has a thickness of these walls of 2.5 mm. At the end of shock, it may still be interesting that the holding device 7 bends without breaking, which allows a metal such as steel. The holding device 7 is screwed onto the gearbox 3. The shock absorber 6, depending on the size of the gearbox 6, has a width along the transverse axis Y which is between 150 and 250 mm. In the exemplary embodiment, the width of the shock absorber is about 200 mm. The shock absorber 6 comprises a honeycomb structure with cavities 62 which are oriented along the longitudinal axis X. The cells 62 have walls whose thickness is between 2 and 4 mm and may be made of different materials. such as soft metal materials such as aluminum, plastics or composite materials. In the exemplary embodiment, the thickness is 3 mm and is made of composite material which comprises short fibers. During an impact against a barrier that extends over the entire height of the front face of the vehicle, the shock absorber 6 forms with the engine 3, a homogeneous assembly that best distributes the deformation of the parts of the vehicle that come in contact with this set. The shock absorber 6 must have good resistance to impact against an obstacle that deforms like a barrier, precisely to homogenize the deformation of the barrier, but must be able to crash in the case of an impact against a rigid structure like a wall. Such behavior is suitable for soft metal materials such as aluminum, plastics or composite materials.

Claims

REVENDICATIONS
1. Partie avant d’un véhicule comportant un compartiment moteur (2) dans lequel est positionné un moteur (3) et une boîte de vitesses (4), la boîte de vitesses (4) étant positionnée latéralement au moteur (3) suivant un même alignement orienté suivant l’axe transversal (Y) du véhicule, avec la paroi frontale (41 ) de la boîte de vitesses (4) qui est positionnée en arrière de la paroi frontale (31 ) du moteur (3), définissant un volume au moins partiellement vide, caractérisée en ce qu’elle comporte un absorbeur de chocs (6) positionné en avant de la paroi frontale (31 ) la boîte de vitesses (3), l’absorbeur (6) étant adapté pour combler au moins en partie ledit volume. 1. Front part of a vehicle having an engine compartment (2) in which is positioned a motor (3) and a gearbox (4), the gearbox (4) being positioned laterally to the engine (3) following a same alignment oriented along the transverse axis (Y) of the vehicle, with the front wall (41) of the gearbox (4) which is positioned behind the front wall (31) of the engine (3), defining a volume at least partially empty, characterized in that it comprises a shock absorber (6) positioned in front of the front wall (31) the gearbox (3), the absorber (6) being adapted to fill at least in part said volume.
2. Partie avant selon la revendication 1 , caractérisée en ce que l’absorbeur (6) se prolonge sur une hauteur supérieure à la hauteur de la boite de vitesse (4), ladite hauteur de l’absorbeur (6) restant inférieure à la hauteur du moteur (3). 2. Front part according to claim 1, characterized in that the absorber (6) extends over a height greater than the height of the gearbox (4), said height of the absorber (6) remaining below the engine height (3).
3. Partie avant selon la revendication 2, caractérisée en ce qu’un élément de renfort (7) est positionné entre une paroi supérieure de la boîte de vitesses (4) et la partie (61 ) de l’absorbeur (6) qui s’étend au-dessus de la boîte de vitesses (4). 3. Front part according to claim 2, characterized in that a reinforcing element (7) is positioned between an upper wall of the gearbox (4) and the part (61) of the absorber (6) which extends above the gearbox (4).
4. Partie avant selon la revendication 3, caractérisée en ce que l’élément de renfort (7) est formé dans une matière métallique, préférentiellement en acier et présente une épaisseur comprise entre 2 mm et 3 mm, préférentiellement ladite épaisseur est de 2,5 mm. 4. Front part according to claim 3, characterized in that the reinforcing element (7) is formed of a metallic material, preferably steel and has a thickness of between 2 mm and 3 mm, preferably said thickness is 2, 5 mm.
5. Partie avant selon l’une quelconque des revendications précédentes, caractérisée en ce que l’absorbeur de chocs (6) comporte une structure en nids d’abeilles qui comporte des alvéoles (62). 5. Front portion according to any one of the preceding claims, characterized in that the shock absorber (6) comprises a honeycomb structure which comprises cells (62).
6. Partie avant selon la revendication 5, caractérisée en ce que les alvéoles (62) sont ouvertes à leurs deux extrémités et sont orientées selon la direction longitudinale (X) du véhicule. 6. Front part according to claim 5, characterized in that the cells (62) are open at both ends and are oriented in the longitudinal direction (X) of the vehicle.
7. Partie avant selon la revendication 5 ou 6, caractérisée en ce que les alvéoles (62) présentent des parois latérales dont l’épaisseur est comprise entre 2 et 4 mm, préférentiellement ladite épaisseur étant de 3 mm. 7. Front part according to claim 5 or 6, characterized in that the cells (62) have side walls whose thickness is between 2 and 4 mm, preferably said thickness being 3 mm.
8. Partie avant selon l’une quelconque des revendications 5 à 7, caractérisée en ce que les alvéoles (62) sont formées dans une matière métallique tendre comme de l’aluminium, dans une matière plastique ou dans des matériaux composites. 8. Front portion according to any one of claims 5 to 7, characterized in that the cells (62) are formed in a soft metal material such as aluminum, in a plastic material or in composite materials.
9. Partie avant selon l’une quelconque des revendications précédentes, caractérisée en ce que l’absorbeur de chocs (6) présente une largeur selon l’axe transversal (Y) du véhicule qui est comprise entre 150 et 250 mm, ladite largeur étant préférentiellement de 200 mm. 9. Front part according to any one of the preceding claims, characterized in that the shock absorber (6) has a width along the transverse axis (Y) of the vehicle which is between 150 and 250 mm, said width being preferably 200 mm.
10. Partie avant selon l’une quelconque des revendications précédentes, caractérisée en ce que l’absorbeur de chocs (6) présentent une hauteur selon l’axe vertical (Z) du véhicule qui est comprise entre 250 et 350 mm, ladite largeur étant préférentiellement de 300 mm. 10. Front part according to any one of the preceding claims, characterized in that the shock absorber (6) have a height along the vertical axis (Z) of the vehicle which is between 250 and 350 mm, said width being preferably 300 mm.
PCT/FR2019/050454 2018-03-22 2019-02-27 Front part of a vehicle, offering improved stability in the event of a front impact WO2019180337A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19717511.0A EP3768576A1 (en) 2018-03-22 2019-02-27 Front part of a vehicle, offering improved stability in the event of a front impact

Applications Claiming Priority (2)

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FR1852496A FR3079183B1 (en) 2018-03-22 2018-03-22 FRONT PART OF A VEHICLE WITH IMPROVED STABILITY IN THE EVENT OF A FRONT SHOCK
FR1852496 2018-03-22

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WO2019180337A1 true WO2019180337A1 (en) 2019-09-26

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PCT/FR2019/050454 WO2019180337A1 (en) 2018-03-22 2019-02-27 Front part of a vehicle, offering improved stability in the event of a front impact

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FR (1) FR3079183B1 (en)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5819408A (en) * 1996-07-10 1998-10-13 Xcorp, Inc. Recyclable, low cost, collision-resistant automobile chassis and body
JPH115566A (en) * 1997-06-16 1999-01-12 Nissan Motor Co Ltd Floor tunnel reinforcing member of automobile
WO2014173476A1 (en) * 2013-04-24 2014-10-30 Daimler Ag Protective device for the front-end structure of an automobile bodyshell
US20170028950A1 (en) * 2015-07-30 2017-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Front end module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5819408A (en) * 1996-07-10 1998-10-13 Xcorp, Inc. Recyclable, low cost, collision-resistant automobile chassis and body
JPH115566A (en) * 1997-06-16 1999-01-12 Nissan Motor Co Ltd Floor tunnel reinforcing member of automobile
WO2014173476A1 (en) * 2013-04-24 2014-10-30 Daimler Ag Protective device for the front-end structure of an automobile bodyshell
US20170028950A1 (en) * 2015-07-30 2017-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Front end module

Also Published As

Publication number Publication date
FR3079183A1 (en) 2019-09-27
EP3768576A1 (en) 2021-01-27
FR3079183B1 (en) 2020-02-21

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