WO2007010165A2 - Energy absorbing assembly, in particular for motor vehicle bumper, and motor vehicle equipped with same - Google Patents
Energy absorbing assembly, in particular for motor vehicle bumper, and motor vehicle equipped with same Download PDFInfo
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- WO2007010165A2 WO2007010165A2 PCT/FR2006/050724 FR2006050724W WO2007010165A2 WO 2007010165 A2 WO2007010165 A2 WO 2007010165A2 FR 2006050724 W FR2006050724 W FR 2006050724W WO 2007010165 A2 WO2007010165 A2 WO 2007010165A2
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- WIPO (PCT)
- Prior art keywords
- absorber
- motor vehicle
- absorbers
- assembly
- transverse beam
- Prior art date
Links
- 239000006096 absorbing agent Substances 0.000 claims abstract description 51
- 230000035939 shock Effects 0.000 claims description 24
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
- B60R19/12—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement vertically spaced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/1886—Bumper fascias and fastening means therefor
Definitions
- Energy absorbing assembly especially for a motor vehicle bumper, and a motor vehicle equipped with such a set.
- the present invention relates to an energy absorbing assembly, particularly for a bumper of a motor vehicle, and a motor vehicle equipped with such an assembly.
- a concern is to ensure the protection of the occupants of the vehicle during a frontal impact, side or rear and also during a reversal of the vehicle.
- the pedestrian impact is used to estimate the bodily injury of an individual in shock on a vehicle. To limit this bodily injury, it is therefore necessary to absorb the kinetic energy under a limited effort.
- the repairable shock consists in estimating the cost of repairs on the vehicle tested, when it hits a rigid wall at a low speed of the order of 16 km / h.
- the design of the vehicle thus makes it possible to reduce the costs of repair at low speed by integrating a zone specially designed to absorb the kinetic energy.
- Document FR-A-2 833 054 discloses a kinetic energy absorption device comprising a rigid beam extending along a longitudinal dimension, an absorber covering the beam and an outer shell at least partially covering the absorber. .
- the device therefore comprises an absorber placed between a shell which forms a piece of style and the rigid beam on which said absorber and said shell are fixed, said rigid beam being itself fixed to the longitudinal members of the chassis of the vehicle.
- This device poses problems that lie in the connection between the rigid beam formed by a metal part and the shell and the absorber made of a plastic material.
- the aim of the invention is to propose an energy absorption assembly that makes it possible to satisfy the safety criteria during a pedestrian impact and during a low-speed impact, while at the same time reducing the dedicated space requirement respectively. to the pedestrian impact and repair shock of the whole.
- the subject of the invention is therefore an energy absorption assembly, in particular for a bumper of a motor vehicle, of the type comprising a transverse beam connected to the side members of the vehicle body, characterized in that it comprises a stack two absorbers bearing on the transverse beam and overlapping at least partially by providing between them and with the transverse beam a free volume, said absorbers comprising, on the one hand, an external absorber for the weakest shocks and, on the other hand an internal absorber for larger shocks.
- the external absorber is formed by a beam having a U-shaped cross section and working in buckling during the weakest shocks
- the inner absorber is formed by a wall having, on its outer face, parallel and horizontal ribs, said ribs working in buckling during an impact,
- the upper and lower longitudinal flanges belonging to the beam and to the wall of the two absorbers are interconnected, for example by interlocking or by welding,
- the upper edge of the wall of the outer absorber is extended by a grid and the lower edge of the beam of the internal absorber is extended by a grid
- the absorbers are made of an elastically deformable material, such as for example a plastic material.
- the invention also relates to a motor vehicle, characterized in that it comprises an energy absorption assembly as previously mentioned.
- FIG. 1 is a schematic perspective view of a front of a motor vehicle equipped with an energy absorption assembly, according to the invention
- FIG. 2 is a schematic perspective view of an energy absorption assembly according to the invention.
- FIG. 3 is a schematic cross-sectional view of the energy absorption assembly according to the invention.
- FIG. 4 is a schematic perspective view of the external absorber of the energy absorption assembly, according to the invention.
- FIG. 5 is a cross-sectional view along line 5-5 of FIG. 4
- FIG. 6 is a schematic perspective view of the internal absorber of the energy absorbing assembly according to the invention
- FIG. 7 is a schematic cross-sectional view along line 7-7 of FIG. 6.
- orientations used are the usual orientations of a motor vehicle and the terms "front” and “rear” refer to the direction of normal operation of the motor vehicle.
- FIG. 1 schematically shows a front of a motor vehicle which comprises in particular a shield 1 having an opening 2 inside which is integrated an energy absorbing assembly designated by the general reference 10 and which satisfies regulations corresponding to a shock called “pedestrian” and a shock called “repairability", ie a shock at low speed.
- the front of the motor vehicle also comprises a front technical 5 supporting in particular a cooling radiator, not shown, and a ventilation unit, not shown.
- This technical front 5 is supported by the two side members 6 of the body of the motor vehicle.
- the assembly 10 comprises, in front of the technical face 5, a bumper reinforcement formed by a transverse beam 11 provided, at each of its ends, with a lateral branch 12 intended to be fixed by appropriate means, no shown on the corresponding spar 6.
- the energy absorbing assembly 10 also comprises a stack of two absorbers bearing on the transverse beam 11, an outer absorber 15 for the weakest shocks and forming an outer skin for the bumper and an internal absorber 25 for bigger shocks.
- the two absorbers 15 and 25 are directly fixed by appropriate means, not shown, to the shield 1, the latter is itself attached to the vehicle structure.
- the absorbers 15 and 25 overlap at least partially.
- the outer absorber 15 with the inner absorber 25 has a free volume 16 while the inner absorber 25 with the transverse beam 11 also has a free space.
- the outer absorber 15 is formed by a beam 17 having a U-shaped cross section having two longitudinal flanges, respectively an upper longitudinal flange 17a and a lower longitudinal flange 17b.
- the upper longitudinal flange 17a of the beam 17 of the internal absorber 15 is extended by a grid 18.
- the assembly formed by the beam 17 and the grid 18 of the internal absorber 15 forms a style element integrating into the general style of the motor vehicle, while forming an energy absorber for the weakest shocks.
- the inner absorber 25 shown in Figs. 6 and 7, is formed of a wall 28 (FIG 7) provided with parallel and horizontal ribs 29 bearing on the transverse beam 11 of the bumper, as shown in FIG. 3.
- the lower rim 28b of the wall 28 of the inner absorber 25 is extended by a grid 30.
- the longitudinal flanges 17a, 28a and 17b and 28b respectively belonging respectively to the beam 17 and to the wall 28 are interconnected, for example by interlocking or by welding.
- the absorbers 15 and 25 are made of an elastically deformable material, such as a plastic material.
- the outer absorber 15 deforms while working in buckling, which makes it possible to absorb the stresses due to such an impact, while having a reduced stroke of the order of 65 to 90 mm. .
- the external absorber 15 is initially stressed, then the inner absorber 25 deforms while working in compression which absorbs greater stresses during a shock at low speed by coming to rest on the transverse beam 11 of the bumper.
- the ribs 29 resting on the transverse beam 11 flambé.
- the energy absorbing assembly according to the invention makes it possible to satisfy the safety criteria during a pedestrian impact and during a low-speed impact, while at the same time making it possible to reduce the bulk of the areas intended for pedestrian shocks and intended for low speed shocks and, thereby, to reduce the size of such an assembly.
- the assembly of the invention allows to use a piece of style at the same time forming an absorber for so-called shocks "pedestrians" thereby saving an extra room.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Ensemble d'absorption d'énergie, notamment pour un pare-chocs de véhicule automobile, et véhicule automobile équipé d'un tel ensemble. Energy absorbing assembly, especially for a motor vehicle bumper, and a motor vehicle equipped with such a set.
La présente invention concerne un ensemble d'absorption d'énergie, notamment pour un pare-chocs de véhicule automobile, et un véhicule automobile équipé d'un tel ensemble.The present invention relates to an energy absorbing assembly, particularly for a bumper of a motor vehicle, and a motor vehicle equipped with such an assembly.
Dans le cadre de la sécurité passive qui concerne l'ensemble des moyens et des actions mises en œuvre pour diminuer les conséquences d'un accident, les constructeurs automobiles doivent faire face à plusieurs préoccupations majeures.In the context of passive safety, which concerns all the means and actions implemented to reduce the consequences of an accident, car manufacturers have to face several major concerns.
Une préoccupation consiste à assurer la protection des occupants du véhicule lors d'un choc frontal, latéral ou arrière et également lors d'un retournement du véhicule.A concern is to ensure the protection of the occupants of the vehicle during a frontal impact, side or rear and also during a reversal of the vehicle.
Une préoccupation également des constructeurs consiste à maîtriser des coûts de réparation du véhicule lors de chocs dits "urbains", c'est à dire à faible vitesse.A concern also manufacturers is to control vehicle repair costs during shocks called "urban", ie at low speed.
Une autre préoccupation des constructeurs consiste à limiter l'agressivité du véhicule vis à vis des autres usagers de la route et notamment les piétons afin de réduire les risques de blessures graves au niveau des jambes de ces piétons.Another concern of manufacturers is to limit the aggressiveness of the vehicle vis-à-vis other road users and especially pedestrians to reduce the risk of serious injury to the legs of these pedestrians.
La conception d'un véhicule automobile doit donc aujourd'hui répondre à de nombreuses réglementations et doit donc subir des procédures d'essais, entre autres, pour le choc piéton et le choc à faible vitesse au niveau de la réparabilité.The design of a motor vehicle must therefore now meet many regulations and must therefore undergo test procedures, among others, for the pedestrian impact and the low-speed shock at the level of repairability.
Le choc piéton permet d'estimer les dommages corporels d'un individu en situation de choc sur un véhicule. Pour limiter ces dommages corporels, il est donc nécessaire d'absorber l'énergie cinétique sous un effort limité.The pedestrian impact is used to estimate the bodily injury of an individual in shock on a vehicle. To limit this bodily injury, it is therefore necessary to absorb the kinetic energy under a limited effort.
Le choc réparabilité consiste à estimer le coût des réparations sur le véhicule testé, lorsqu'il percute un mur rigide à faible vitesse de l'ordre de 16 km/h. La conception du véhicule permet donc de réduire les coûts de réparation à basse vitesse en intégrant une zone spécialement destinée à faire absorber l'énergie cinétique. On connaît dans le document FR-A-2 833 054, un dispositif d'absorption d'énergie cinétique comprenant une poutre rigide s'étendant suivant une dimension longitudinale, un absorbeur recouvrant la poutre et une coquille externe recouvrant au moins partiellement l'absorbeur.The repairable shock consists in estimating the cost of repairs on the vehicle tested, when it hits a rigid wall at a low speed of the order of 16 km / h. The design of the vehicle thus makes it possible to reduce the costs of repair at low speed by integrating a zone specially designed to absorb the kinetic energy. Document FR-A-2 833 054 discloses a kinetic energy absorption device comprising a rigid beam extending along a longitudinal dimension, an absorber covering the beam and an outer shell at least partially covering the absorber. .
Dans ce document, le dispositif comporte donc un absorbeur placé entre une coquille qui forme une pièce de style et la poutre rigide sur laquelle sont fixés ledit absorbeur et ladite coquille, ladite poutre rigide étant elle- même fixée sur les longerons du châssis du véhicule.In this document, the device therefore comprises an absorber placed between a shell which forms a piece of style and the rigid beam on which said absorber and said shell are fixed, said rigid beam being itself fixed to the longitudinal members of the chassis of the vehicle.
Ce dispositif pose des problèmes qui résident dans la liaison entre la poutre rigide formée par une pièce métallique et la coquille et l'absorbeur réalisés en une matière plastique.This device poses problems that lie in the connection between the rigid beam formed by a metal part and the shell and the absorber made of a plastic material.
De plus, l'encombrement d'un tel agencement est relativement important.In addition, the size of such an arrangement is relatively large.
L'évolution technique des dispositifs d'absorption d'énergie est aujourd'hui guidée par deux préoccupations, à savoir celle d'augmenter leurs performances en termes d'absorption d'énergie et celle de donner des dimensions aussi modestes que possible, tout en s'intégrant dans le style du véhicule.The technical evolution of energy absorption devices is today guided by two concerns, namely that of increasing their performances in terms of energy absorption and that of giving dimensions as modest as possible, while integrating into the style of the vehicle.
L'invention a pour but de proposer un ensemble d'absorption d'énergie qui permet de satisfaire aux critères de sécurité lors d'un choc piéton et lors d'un choc à faible vitesse, tout en permettant de réduire l'encombrement dédié respectivement au choc piéton et au choc réparabilité de l'ensemble.The aim of the invention is to propose an energy absorption assembly that makes it possible to satisfy the safety criteria during a pedestrian impact and during a low-speed impact, while at the same time reducing the dedicated space requirement respectively. to the pedestrian impact and repair shock of the whole.
L'invention a donc pour objet un ensemble d'absorption d'énergie, notamment pour un pare-chocs de véhicule automobile, du type comprenant une poutre transversale reliée aux longerons de la caisse du véhicule, caractérisé en ce qu'il comprend un empilement de deux absorbeurs en appui sur la poutre transversale et se recouvrant au moins partiellement en ménageant entre eux et avec la poutre transversale un volume libre, lesdits absorbeurs comprenant, d'une part, un absorbeur externe pour les plus faibles chocs et, d'autre part, un absorbeur interne pour les chocs plus importants.The subject of the invention is therefore an energy absorption assembly, in particular for a bumper of a motor vehicle, of the type comprising a transverse beam connected to the side members of the vehicle body, characterized in that it comprises a stack two absorbers bearing on the transverse beam and overlapping at least partially by providing between them and with the transverse beam a free volume, said absorbers comprising, on the one hand, an external absorber for the weakest shocks and, on the other hand an internal absorber for larger shocks.
Selon d'autres caractéristiques de l'invention : - l'absorbeur externe est formé par une poutre présentant une section transversale en U et travaillant en flambement lors des plus faibles chocs,According to other features of the invention: the external absorber is formed by a beam having a U-shaped cross section and working in buckling during the weakest shocks,
- l'absorbeur interne est formé par une paroi comportant, sur sa face extérieure, des nervures parallèles et horizontales, lesdites nervures travaillant en flambement lors d'un choc,- The inner absorber is formed by a wall having, on its outer face, parallel and horizontal ribs, said ribs working in buckling during an impact,
- les rebords longitudinaux respectivement supérieurs et inférieurs appartenant à la poutre et à la paroi des deux absorbeurs sont reliés entre eux par exemple par emboîtement ou par soudage,the upper and lower longitudinal flanges belonging to the beam and to the wall of the two absorbers are interconnected, for example by interlocking or by welding,
- le rebord supérieur de la paroi de l'absorbeur externe est prolongé par une grille et le rebord inférieur de la poutre de l'absorbeur interne est prolongé par une grille, etthe upper edge of the wall of the outer absorber is extended by a grid and the lower edge of the beam of the internal absorber is extended by a grid, and
- les absorbeurs sont réalisés en une matière élastiquement déformable, comme par exemple une matière plastique.the absorbers are made of an elastically deformable material, such as for example a plastic material.
L'invention a également pour objet un véhicule automobile, caractérisé en ce qu'il comporte un ensemble d'absorption d'énergie tel que précédemment mentionné.The invention also relates to a motor vehicle, characterized in that it comprises an energy absorption assembly as previously mentioned.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :The invention will be better understood on reading the description which follows, given by way of example and with reference to the appended drawings, in which:
- la Fig. 1 est une vue schématique en perspective d'un avant d'un véhicule automobile équipé d'un ensemble d'absorption d'énergie, conforme à l'invention,FIG. 1 is a schematic perspective view of a front of a motor vehicle equipped with an energy absorption assembly, according to the invention,
- la Fig. 2 est une vue schématique en perspective d'un ensemble d'absorption d'énergie, conforme à l'inventionFIG. 2 is a schematic perspective view of an energy absorption assembly according to the invention.
- la Fig. 3 est une vue schématique en coupe transversale de l'ensemble d'absorption d'énergie, conforme à l'invention,FIG. 3 is a schematic cross-sectional view of the energy absorption assembly according to the invention,
- la Fig. 4 est une vue schématique en perspective de l'absorbeur externe de l'ensemble d'absorption d'énergie, conforme à l'invention,FIG. 4 is a schematic perspective view of the external absorber of the energy absorption assembly, according to the invention,
- la Fig. 5 est une vue en coupe transversale selon la ligne 5-5 de la Fig. 4,FIG. 5 is a cross-sectional view along line 5-5 of FIG. 4
- la Fig. 6 est une vue schématique en perspective de l'absorbeur interne de l'ensemble d'absorption d'énergie, conforme à l'invention, et - la Fig. 7 est une vue schématique en coupe transversale selon la ligne 7-7 de la Fig. 6.FIG. 6 is a schematic perspective view of the internal absorber of the energy absorbing assembly according to the invention, and FIG. 7 is a schematic cross-sectional view along line 7-7 of FIG. 6.
Dans la description qui suit, les orientations utilisées sont les orientations habituelles d'un véhicule automobile et les termes "avant" et "arrière" s'entendent par rapport au sens de la marche normale du véhicule automobile.In the following description, the orientations used are the usual orientations of a motor vehicle and the terms "front" and "rear" refer to the direction of normal operation of the motor vehicle.
Sur la Fig. 1 , on a représenté schématiquement un avant d'un véhicule automobile qui comprend notamment un bouclier 1 comportant une ouverture 2 à l'intérieur de laquelle est intégré un ensemble d'absorption d'énergie désigné par la référence générale 10 et qui permet de satisfaire aux réglementations correspondant à un choc dit "piéton" et à un choc dit "réparabilité", c'est à dire un choc à faible vitesse.In FIG. 1 schematically shows a front of a motor vehicle which comprises in particular a shield 1 having an opening 2 inside which is integrated an energy absorbing assembly designated by the general reference 10 and which satisfies regulations corresponding to a shock called "pedestrian" and a shock called "repairability", ie a shock at low speed.
Ainsi que montré à la Fig. 2, l'avant du véhicule automobile comprend également une face avant technique 5 supportant notamment un radiateur de refroidissement, non représenté, ainsi qu'un groupe de ventilation, non représenté.As shown in FIG. 2, the front of the motor vehicle also comprises a front technical 5 supporting in particular a cooling radiator, not shown, and a ventilation unit, not shown.
Cette face avant technique 5 est supportée par les deux longerons 6 de la caisse du véhicule automobile.This technical front 5 is supported by the two side members 6 of the body of the motor vehicle.
L'ensemble 10 comporte, en avant de la face technique 5, une armature de pare-chocs formée par une poutre transversale 11 munie, à chacune de ses extrémités, d'une branche latérale 12 destinée à être fixée par des moyens appropriés, non représentés, sur le longeron 6 correspondant.The assembly 10 comprises, in front of the technical face 5, a bumper reinforcement formed by a transverse beam 11 provided, at each of its ends, with a lateral branch 12 intended to be fixed by appropriate means, no shown on the corresponding spar 6.
L'ensemble 10 d'absorption d'énergie comprend également un empilement de deux absorbeurs en appui sur la poutre transversale 11 , un absorbeur externe 15 pour les plus faibles chocs et formant une peau extérieure pour le pare-chocs et un absorbeur interne 25 pour les chocs plus importants.The energy absorbing assembly 10 also comprises a stack of two absorbers bearing on the transverse beam 11, an outer absorber 15 for the weakest shocks and forming an outer skin for the bumper and an internal absorber 25 for bigger shocks.
Les deux absorbeurs 15 et 25 sont directement fixés par des moyens appropriés, non représentés, au bouclier 1 , ce dernier est lui-même fixé à la structure du véhicule.The two absorbers 15 and 25 are directly fixed by appropriate means, not shown, to the shield 1, the latter is itself attached to the vehicle structure.
Comme montré sur les Figs. 2 et 3, les absorbeurs 15 et 25 se recouvrent au moins partiellement. L'absorbeur externe 15 ménage avec l'absorbeur interne 25 un volume libre 16 tandis que l'absorbeur interne 25 ménage avec la poutre transversale 11 également un espace libre 26. Comme représenté plus particulièrement sur les Figs. 4 et 5, l'absorbeur externe 15 est formé par une poutre 17 présentant une section transversale en U comportant deux rebords longitudinaux, respectivement un rebord longitudinal supérieur 17a et un rebord longitudinal Inférieur 17b. Le rebord longitudinal supérieur 17a de la poutre 17 de l'absorbeur interne 15 est prolongé par une grille 18.As shown in Figs. 2 and 3, the absorbers 15 and 25 overlap at least partially. The outer absorber 15 with the inner absorber 25 has a free volume 16 while the inner absorber 25 with the transverse beam 11 also has a free space. shown more particularly in Figs. 4 and 5, the outer absorber 15 is formed by a beam 17 having a U-shaped cross section having two longitudinal flanges, respectively an upper longitudinal flange 17a and a lower longitudinal flange 17b. The upper longitudinal flange 17a of the beam 17 of the internal absorber 15 is extended by a grid 18.
Ainsi, l'ensemble constitué par la poutre 17 et la grille 18 de l'absorbeur interne 15 forme un élément de style s'intégrant dans le style général du véhicule automobile, tout en formant un absorbeur d'énergie pour les plus faibles chocs.Thus, the assembly formed by the beam 17 and the grid 18 of the internal absorber 15 forms a style element integrating into the general style of the motor vehicle, while forming an energy absorber for the weakest shocks.
L'absorbeur interne 25 représenté sur les Figs. 6 et 7, est formé d'une paroi 28 (Fig. 7) pourvue de nervures 29 parallèles et horizontales en appui sur la poutre transversale 11 du pare-chocs, comme montré à la Fig. 3. Le rebord inférieur 28b de la paroi 28 de l'absorbeur interne 25 est prolongé par une grille 30.The inner absorber 25 shown in Figs. 6 and 7, is formed of a wall 28 (FIG 7) provided with parallel and horizontal ribs 29 bearing on the transverse beam 11 of the bumper, as shown in FIG. 3. The lower rim 28b of the wall 28 of the inner absorber 25 is extended by a grid 30.
Lors de l'assemblage des deux absorbeurs, respectivement 15 et 25, les rebords longitudinaux, respectivement supérieurs 17a, 28a et inférieurs 17b et 28b appartenant respectivement à la poutre 17 et à la paroi 28, sont reliés entre eux par exemple par emboîtement ou par soudage.During the assembly of the two absorbers, respectively 15 and 25, the longitudinal flanges 17a, 28a and 17b and 28b respectively belonging respectively to the beam 17 and to the wall 28 are interconnected, for example by interlocking or by welding.
Enfin, les absorbeurs 15 et 25 sont réalisés en une matière élastiquement déformable, comme par exemple une matière plastique.Finally, the absorbers 15 and 25 are made of an elastically deformable material, such as a plastic material.
Lors d'un choc avec un piéton, l'absorbeur externe 15 se déforme en travaillant en flambement, ce qui permet d'absorber les sollicitations dues à un tel choc, tout en présentant une course réduite de l'ordre de 65 à 90 mm.During an impact with a pedestrian, the outer absorber 15 deforms while working in buckling, which makes it possible to absorb the stresses due to such an impact, while having a reduced stroke of the order of 65 to 90 mm. .
Lors d'un choc plus important, l'absorbeur externe 15 est dans un premier temps sollicité, puis l'absorbeur interne 25 se déforme en travaillant en compression ce qui permet d'absorber des sollicitations plus importantes lors d'un choc à faible vitesse en venant s'appuyer sur la poutre transversale 11 du pare-chocs. Ainsi, suite à un choc plus important, les nervures 29 en appui sur la poutre transversale 11 flambent.During a greater shock, the external absorber 15 is initially stressed, then the inner absorber 25 deforms while working in compression which absorbs greater stresses during a shock at low speed by coming to rest on the transverse beam 11 of the bumper. Thus, following a greater shock, the ribs 29 resting on the transverse beam 11 flambé.
L'ensemble d'absorption d'énergie selon l'invention permet de satisfaire aux critères de sécurité lors d'un choc piéton et lors d'un choc à faible vitesse, tout en permettant de réduire l'encombrement des zones destinées aux chocs piétons et destinées aux chocs à faible vitesse et, de ce fait, de diminuer l'encombrement d'un tel ensemble.The energy absorbing assembly according to the invention makes it possible to satisfy the safety criteria during a pedestrian impact and during a low-speed impact, while at the same time making it possible to reduce the bulk of the areas intended for pedestrian shocks and intended for low speed shocks and, thereby, to reduce the size of such an assembly.
De plus, l'ensemble selon l'invention permet d'utiliser une pièce de style formant en même temps un absorbeur pour les chocs dits "piétons" permettant de ce fait d'économiser une pièce supplémentaire. In addition, the assembly of the invention allows to use a piece of style at the same time forming an absorber for so-called shocks "pedestrians" thereby saving an extra room.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0507620 | 2005-07-18 | ||
| FR0507620A FR2888545B1 (en) | 2005-07-18 | 2005-07-18 | ENERGY ABSORPTION ASSEMBLY, IN PARTICULAR FOR A BUMPER FOR A MOTOR VEHICLE, AND A MOTOR VEHICLE EQUIPPED WITH SUCH AN ASSEMBLY |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007010165A2 true WO2007010165A2 (en) | 2007-01-25 |
| WO2007010165A3 WO2007010165A3 (en) | 2007-03-29 |
Family
ID=35874753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2006/050724 WO2007010165A2 (en) | 2005-07-18 | 2006-07-18 | Energy absorbing assembly, in particular for motor vehicle bumper, and motor vehicle equipped with same |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2888545B1 (en) |
| WO (1) | WO2007010165A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016190540A (en) * | 2015-03-31 | 2016-11-10 | ダイハツ工業株式会社 | Front bumper of vehicle |
| CN108725362A (en) * | 2017-04-21 | 2018-11-02 | 标致雪铁龙汽车股份有限公司 | The especially End assemblies at the rear portion of motor vehicles |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2912101A1 (en) * | 2007-02-05 | 2008-08-08 | Renault Sas | Fixed protection element i.e. hollow transversal flange, arrangement for rear face bar of motor vehicle, has element assembled with respect to bar between rest position and damping position in which element is projected towards rear |
| FR2927033B1 (en) * | 2008-02-05 | 2010-03-26 | Peugeot Citroen Automobiles Sa | ENERGY ABSORPTION BEAM FOR FRONT BUMPER AND BUMPER BEFORE MOTOR VEHICLE |
| FR2959464B1 (en) * | 2010-04-29 | 2012-04-27 | Peugeot Citroen Automobiles Sa | ENERGY ABSORPTION DEVICE FOR VEHICLE BUMPER. |
| FR3011520B1 (en) | 2013-10-09 | 2016-12-16 | Autotech Eng A I E | SHOCK ABSORBER SYSTEM FOR MOTOR VEHICLE |
| FR3047222B1 (en) * | 2016-01-28 | 2018-02-02 | Renault S.A.S | AERIAL GRID MOLDING ELEMENT FOR FRONT PANEL OF MOTOR VEHICLE. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2736315B1 (en) * | 1995-07-07 | 1997-08-14 | Renault | DEVICE FOR MOUNTING A BUMPER ON A VEHICLE STRUCTURE |
| JP2002274430A (en) * | 2001-03-15 | 2002-09-25 | Fuji Heavy Ind Ltd | Body front structure |
| GB0124108D0 (en) * | 2001-10-06 | 2001-11-28 | Ford Global Tech Inc | A bumper assembly |
| FR2833054B1 (en) | 2001-12-05 | 2004-07-02 | Peugeot Citroen Automobiles Sa | ELASTIC RESISTANCE AND FLAMMING KINETIC ENERGY ABSORPTION DEVICE AND APPLICATION |
| FR2840573B1 (en) * | 2002-06-11 | 2004-09-10 | Faurecia Ind | BUMPER ASSEMBLY, MOTOR VEHICLE AND MANUFACTURING METHOD THEREOF |
-
2005
- 2005-07-18 FR FR0507620A patent/FR2888545B1/en not_active Expired - Fee Related
-
2006
- 2006-07-18 WO PCT/FR2006/050724 patent/WO2007010165A2/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016190540A (en) * | 2015-03-31 | 2016-11-10 | ダイハツ工業株式会社 | Front bumper of vehicle |
| CN108725362A (en) * | 2017-04-21 | 2018-11-02 | 标致雪铁龙汽车股份有限公司 | The especially End assemblies at the rear portion of motor vehicles |
| CN108725362B (en) * | 2017-04-21 | 2023-03-14 | 标致雪铁龙汽车股份有限公司 | End assembly, in particular for the rear part of a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007010165A3 (en) | 2007-03-29 |
| FR2888545B1 (en) | 2007-10-19 |
| FR2888545A1 (en) | 2007-01-19 |
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