WO2006042999A1 - Motor vehicle hood with a reinforced liner - Google Patents
Motor vehicle hood with a reinforced liner Download PDFInfo
- Publication number
- WO2006042999A1 WO2006042999A1 PCT/FR2005/050862 FR2005050862W WO2006042999A1 WO 2006042999 A1 WO2006042999 A1 WO 2006042999A1 FR 2005050862 W FR2005050862 W FR 2005050862W WO 2006042999 A1 WO2006042999 A1 WO 2006042999A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hood
- skin
- cavities
- lining
- cavity
- 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.)
- Ceased
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
- B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components
Definitions
- the invention relates to a reinforced lining for a hood of a motor vehicle, and a hood provided with such a lining.
- Motor vehicle hoods are generally formed of a skin forming the visible side of the hood, and a reinforcement, called lining, placed on the invisible side of the hood.
- a reinforcement called lining
- the lining and the skin are glued and / or crimped on the periphery of the bonnet, and cushioning pads, generally made of low resistance mastic, provide a bond between the skin. and the liner on the rest of the hood surface.
- the liner is also designed to cushion the impact on a pedestrian's head.
- the lining generally has cavities, whose concavity is directed towards the bonnet skin, called “hollow body”. These hollow bodies locally reinforce the hood and reduce the acceleration experienced by the head of a pedestrian contacted with the hood. This deceleration reduces the damage to the pedestrian.
- the edges of the hollow body of the liner can not be welded to the hood for aesthetic reasons, in case of impact, the bonnet skin will tend to enter the hollow body, and it will tend to deform, reducing thus its ability to dampen the shock.
- a pedestrian's head may not be sufficiently decelerated and descend until the liner comes into contact with a component of the engine compartment, thus aggravating the pedestrian's bodily injury.
- one solution is to increase the mass of the lining by itself doubling a plate that conforms to its shape, as described in EP-I 357 018.
- Another solution described in document JP-62210178, consists in producing a lining by enclosing a honeycomb structure between two plates. Such a structure is however complex and expensive to achieve. It is also difficult to work on its entire surface so that some parts of the hood are likely to cause damage greater body weight by not cushioning a pedestrian impact in the expected manner.
- the invention aims to overcome these disadvantages by providing a reinforced bonnet liner so that, during the impact of the head of a pedestrian, the hollow body retains its rigidity and thus more effectively absorbs the energy of the shock.
- the object of the invention relates to a hood liner of a motor vehicle, comprising cavities whose concavity is intended to be directed towards the skin of the hood, characterized in that at least one cavity is closed at least partially by at least one reinforcing plate, which is joined by a rigid connection to at least two opposite edges of the cavity.
- the invention also has the advantage of not requiring changes in the structure of the liner, and can be adapted to any type of lining.
- a single reinforcing plate closes one or more cavities.
- the liner then has a relatively high weight.
- the reinforcing plate is assembled to the two opposite edges closest to the at least partially closed cavity, for a greater increase in the rigidity of the cavity. This is particularly the case of elongated cavities.
- the invention also relates to a motor vehicle hood formed of a skin intended to be visible, reinforced by a liner according to the invention, the edges of the liner being joined to the edges of the skin.
- the cavity closed at least partially of the liner corresponds to a part of the cover intended to be placed substantially above the rigid components of the compartment engine. Only the most dangerous areas for a pedestrian can thus be reinforced.
- the cavity closed at least partially of the liner corresponds to a portion of the hood having the greatest probability of receiving a shock.
- FIG. 1 is a perspective representation of a section along line AA of FIG. 2 showing a reinforced cavity of a liner and the skin of FIG. 'a cap ;
- Figure 2 is a top view of a reinforced liner according to the invention.
- FIG. 1 partially shows a hood 1 of a motor vehicle formed of a skin 2, forming the outer part of the hood, and a lining 3.
- the lining 3 is assembled in a known manner to the inner face of the skin by its edges. .
- Stub pads (not shown) may further be placed between the liner and the skin in a known manner.
- the lining is in the form of a thin plate substantially flat and of the same dimensions as the hood. It may have recesses 6 to reduce the weight of the hood.
- the liner 3 has three cavities 4a, 4b, 4c, the concavity of which is directed towards the skin 2.
- the two lateral cavities 4a and 4c are elongated and a central cavity has a substantially T-shaped shape.
- cavities 4a, 4b, 4c are each partially closed by a reinforcing plate 5a, 5b, 5c, respectively.
- the reinforcing plates 5a, 5b, 5c may be of the same or different material as the lining. They may for example be steel, aluminum, or a visco-thermoelasto plastic material. Their edges are joined to the edges of the cavities by a rigid connection capable of transmitting the forces resulting from a shock. This connection can be formed by gluing, welding, clinching or any other suitable method.
- the invention thus makes it possible in a simple and inexpensive manner to locally adjust the rigidity of the lining and thus the hood, without substantially modifying the structure and the properties of the hood.
- This rigidity can be adjusted without considerably increasing the overall weight of the hood by using one or more locally-arranged reinforcing plates, and / or by choosing a light material.
- several plates of small widths can partially close the same cavity, so as to further limit the total increase in weight of the liner.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Superstructure Of Vehicle (AREA)
Abstract
Description
CAPOT DE VEHICULE AUTOMOBILE AVEC DOUBLURE RENFORCEE HOOD FOR MOTOR VEHICLE WITH REINFORCED LINING
L'invention concerne une doublure renforcée destinée à un capot de véhicule automobile, et un capot pourvu d'une telle doublure.The invention relates to a reinforced lining for a hood of a motor vehicle, and a hood provided with such a lining.
Les capots de véhicule automobile sont généralement formés d'une peau formant le côté visible du capot, et d'un renfort, appelé doublure, placé du côté invisible du capot. Afin de conférer au capot une tenue géométrique et de la raideur statique, la doublure et la peau sont collées et/ ou serties sur la périphérie du capot, et des plots de calage, généralement en mastic de faible résistance, assurent une liaison entre la peau et la doublure sur le reste de la surface du capot.Motor vehicle hoods are generally formed of a skin forming the visible side of the hood, and a reinforcement, called lining, placed on the invisible side of the hood. In order to give the bonnet a geometrical fit and static stiffness, the lining and the skin are glued and / or crimped on the periphery of the bonnet, and cushioning pads, generally made of low resistance mastic, provide a bond between the skin. and the liner on the rest of the hood surface.
La doublure est également conçue de manière à amortir le choc subi par la tête d'un piéton. A cet effet, la doublure présente généralement des cavités, dont la concavité est dirigée vers la peau de capot, appelées "corps creux". Ces corps creux renforcent localement le capot et réduisent l'accélération subie par la tête d'un piéton entrée en contact avec le capot. Cette décélération permet de réduire les dommages subis par le piéton.The liner is also designed to cushion the impact on a pedestrian's head. For this purpose, the lining generally has cavities, whose concavity is directed towards the bonnet skin, called "hollow body". These hollow bodies locally reinforce the hood and reduce the acceleration experienced by the head of a pedestrian contacted with the hood. This deceleration reduces the damage to the pedestrian.
Les bords des corps creux de la doublure ne pouvant être soudés au capot pour des raisons esthétiques, en cas de choc, la peau de capot va avoir tendance à rentrer dans le corps creux, et celui-ci va avoir tendance à se déformer, réduisant ainsi sa capacité à amortir le choc. La tête d'un piéton peut alors ne pas être suffisamment décélérée et descendre jusqu'à ce que la doublure entre en contact avec un élément du compartiment moteur, aggravant ainsi les dommages corporels subis par le piéton.The edges of the hollow body of the liner can not be welded to the hood for aesthetic reasons, in case of impact, the bonnet skin will tend to enter the hollow body, and it will tend to deform, reducing thus its ability to dampen the shock. A pedestrian's head may not be sufficiently decelerated and descend until the liner comes into contact with a component of the engine compartment, thus aggravating the pedestrian's bodily injury.
Pour remédier à ce problème, une solution consiste à augmenter la masse de la doublure en la doublant elle-même d'une plaque qui épouse sa forme, tel que décrit dans le document EP-I 357 018. Toutefois, une telle augmentation de masse conduit à une mise en mouvement plus lente du capot lors d'un choc, ce qui peut être dommageable pour un piéton. Une autre solution, décrite dans le document JP-62210178, consiste à réaliser une doublure en enfermant une structure en nid d'abeille entre deux plaques. Une telle structure s'avère cependant complexe et coûteuse à réaliser. Elle est par ailleurs difficile à faire travailler sur toute sa surface de sorte que certaines parties du capot sont susceptibles de provoquer des dommages corporels plus importants en n'amortissant pas un choc piéton de la manière attendue.To remedy this problem, one solution is to increase the mass of the lining by itself doubling a plate that conforms to its shape, as described in EP-I 357 018. However, such an increase in mass leads to a slower movement of the hood during an impact, which can be harmful for a pedestrian. Another solution, described in document JP-62210178, consists in producing a lining by enclosing a honeycomb structure between two plates. Such a structure is however complex and expensive to achieve. It is also difficult to work on its entire surface so that some parts of the hood are likely to cause damage greater body weight by not cushioning a pedestrian impact in the expected manner.
L'invention vise à pallier ces inconvénients en proposant une doublure de capot renforcée de sorte que, lors de l'impact de la tête d'un piéton, le corps creux conserve sa rigidité et absorbe ainsi plus efficacement l'énergie du choc.The invention aims to overcome these disadvantages by providing a reinforced bonnet liner so that, during the impact of the head of a pedestrian, the hollow body retains its rigidity and thus more effectively absorbs the energy of the shock.
A cet effet, l'objet de l'invention concerne une doublure de capot de véhicule automobile, comportant des cavités dont la concavité est destinée à être dirigée vers la peau du capot, caractérisée en ce qu'au moins une cavité est fermée au moins partiellement par au moins une plaque de renfort, laquelle est assemblée par une liaison rigide à au moins deux bords opposés de la cavité.For this purpose, the object of the invention relates to a hood liner of a motor vehicle, comprising cavities whose concavity is intended to be directed towards the skin of the hood, characterized in that at least one cavity is closed at least partially by at least one reinforcing plate, which is joined by a rigid connection to at least two opposite edges of the cavity.
On améliore ainsi de manière simple et peu coûteuse la rigidité de la doublure, la fermeture, même partielle, des cavités limitant leur déformation en cas d'impact, ce qui améliore les performances du capot en termes d'amortissement des chocs piétons. De plus, la cavité n'étant pas remplie, l'augmentation de poids de la doublure reste faible. L'invention présente également l'avantage de ne pas nécessiter de modifications de la structure de la doublure, et peut être adaptée à tout type de doublure.This improves the rigidity of the lining in a simple and inexpensive manner, the closing, even partial, of the cavities limiting their deformation in the event of an impact, which improves the performance of the hood in terms of damping pedestrian shocks. In addition, the cavity is not filled, the weight increase of the lining remains low. The invention also has the advantage of not requiring changes in the structure of the liner, and can be adapted to any type of lining.
Une seule plaque de renfort ferme une ou plusieurs cavités. La doublure présente alors un poids relativement élevé. On peut également choisir de ne fermer, au moins partiellement, que certaines cavités en assemblant leurs bords à la plaque, les bords des autres cavités n'étant pas liés rigidement à la plaque. Il est ainsi possible de choisir la rigidité de chaque cavité de la doublure, et de l'adapter en fonction des besoins.A single reinforcing plate closes one or more cavities. The liner then has a relatively high weight. One can also choose to close, at least partially, some cavities by assembling their edges to the plate, the edges of the other cavities not being rigidly connected to the plate. It is thus possible to choose the rigidity of each cavity of the lining, and to adapt it as needed.
Avantageusement, la plaque de renfort est assemblée aux deux bords opposés les plus proches de la cavité au moins partiellement fermée, pour une augmentation plus importante de la rigidité de la cavité. C'est le cas notamment des cavités de forme allongée.Advantageously, the reinforcing plate is assembled to the two opposite edges closest to the at least partially closed cavity, for a greater increase in the rigidity of the cavity. This is particularly the case of elongated cavities.
L'invention concerne également un capot de véhicule automobile formé d'une peau destinée à être visible, renforcée par une doublure selon l'invention, les bords de la doublure étant assemblés aux bords de la peau. Avantageusement, la cavité fermée au moins partiellement de la doublure correspond à une partie du capot destinée à être placée sensiblement au dessus de composants rigides du compartiment moteur. Seules les zones les plus dangereuses pour un piéton peuvent ainsi être renforcées.The invention also relates to a motor vehicle hood formed of a skin intended to be visible, reinforced by a liner according to the invention, the edges of the liner being joined to the edges of the skin. Advantageously, the cavity closed at least partially of the liner corresponds to a part of the cover intended to be placed substantially above the rigid components of the compartment engine. Only the most dangerous areas for a pedestrian can thus be reinforced.
Encore plus avantageusement, la cavité fermée au moins partiellement de la doublure correspond à une partie du capot présentant la plus grande probabilité de recevoir un choc. On peut ainsi choisir de ne fermer que les cavités les plus exposées, ce qui permet de moduler localement la rigidité de la doublure. Ces zones peuvent correspondre, ou non, avec les zones précédemment décrites. Seules quelques plaques de renfort de faible surface peuvent être utilisées, allégeant ainsi la doublure, ou bien, une seule plaque peut être assemblée rigidement à certaines ou à toutes les cavités.Even more advantageously, the cavity closed at least partially of the liner corresponds to a portion of the hood having the greatest probability of receiving a shock. We can choose to close only the most exposed cavities, which allows to modulate the stiffness of the lining locally. These zones may or may not correspond with the previously described zones. Only a few small reinforcing plates can be used, thus lightening the liner, or a single plate can be rigidly joined to some or all of the cavities.
L'invention est maintenant décrite en référence aux dessins annexés, non limitatifs, dans lesquels : la figure 1 est une représentation en perspective d'une coupe selon la ligne A-A de la figure 2 représentant une cavité renforcée d'une doublure et la peau d'un capot ; la figure 2 est une vue de dessus d'une doublure renforcée selon l'invention.The invention is now described with reference to the accompanying non-limiting drawings, in which: FIG. 1 is a perspective representation of a section along line AA of FIG. 2 showing a reinforced cavity of a liner and the skin of FIG. 'a cap ; Figure 2 is a top view of a reinforced liner according to the invention.
La figure 1 représente partiellement un capot 1 de véhicule automobile formé d'une peau 2, formant la partie externe du capot, et d'une doublure 3. La doublure 3 est assemblée de manière connue à la face interne de la peau par ses bords. Des plots de calage (non représentés) peuvent en outre être placés entre la doublure et la peau de manière connue. La doublure se présente sous la forme d'une plaque de faible épaisseur sensiblement plane et de mêmes dimensions que le capot. Elle peut présenter des évidements 6 afin de réduire le poids du capot.FIG. 1 partially shows a hood 1 of a motor vehicle formed of a skin 2, forming the outer part of the hood, and a lining 3. The lining 3 is assembled in a known manner to the inner face of the skin by its edges. . Stub pads (not shown) may further be placed between the liner and the skin in a known manner. The lining is in the form of a thin plate substantially flat and of the same dimensions as the hood. It may have recesses 6 to reduce the weight of the hood.
Dans l'exemple, la doublure 3 présente trois cavités 4a, 4b, 4c, dont la concavité est dirigée vers la peau 2. Les deux cavités 4a et 4c latérales sont allongées et une cavité centrale présente sensiblement une forme en T.In the example, the liner 3 has three cavities 4a, 4b, 4c, the concavity of which is directed towards the skin 2. The two lateral cavities 4a and 4c are elongated and a central cavity has a substantially T-shaped shape.
Ces cavités 4a, 4b, 4c sont chacune partiellement fermées par une plaque de renfort 5a, 5b, 5c, respectivement.These cavities 4a, 4b, 4c are each partially closed by a reinforcing plate 5a, 5b, 5c, respectively.
Les bords de ces plaques de renfort sont assemblés aux deux bords opposés les plus proches des cavités, tel que visible sur la figureThe edges of these reinforcing plates are assembled to the two opposite edges closest to the cavities, as visible in FIG.
2. Les plaques de renfort 5a, 5b, 5c peuvent être d'un matériau identique ou différent de celui de la doublure. Elles peuvent par exemple être en acier, aluminium, ou en un matériau visco-thermo- élasto plastique. Leurs bords sont assemblés aux bords des cavités par une liaison rigide apte à transmettre les efforts issus d'un choc. Cette liaison peut être formée par collage, soudage, clinchage ou toute autre méthode appropriée.2. The reinforcing plates 5a, 5b, 5c may be of the same or different material as the lining. They may for example be steel, aluminum, or a visco-thermoelasto plastic material. Their edges are joined to the edges of the cavities by a rigid connection capable of transmitting the forces resulting from a shock. This connection can be formed by gluing, welding, clinching or any other suitable method.
L'invention permet ainsi de manière simple et peu coûteuse d'ajuster localement la rigidité de la doublure et donc du capot, ceci sans modifier de manière conséquente la structure et les propriétés du capot. Cette rigidité peut être ajustée sans augmenter de manière considérable le poids total du capot en utilisant une ou plusieurs plaques de renfort disposées localement, et/ ou en choisissant un matériau léger. Par ailleurs, plusieurs plaques de faibles largeurs peuvent fermer partiellement une même cavité, de manière à limiter encore davantage l'augmentation totale de poids de la doublure. The invention thus makes it possible in a simple and inexpensive manner to locally adjust the rigidity of the lining and thus the hood, without substantially modifying the structure and the properties of the hood. This rigidity can be adjusted without considerably increasing the overall weight of the hood by using one or more locally-arranged reinforcing plates, and / or by choosing a light material. Moreover, several plates of small widths can partially close the same cavity, so as to further limit the total increase in weight of the liner.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0411132 | 2004-10-20 | ||
| FR0411132A FR2876653A1 (en) | 2004-10-20 | 2004-10-20 | REINFORCED LINING FOR MOTOR VEHICLE COVER, AND CORRESPONDING HOOD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006042999A1 true WO2006042999A1 (en) | 2006-04-27 |
Family
ID=34951698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2005/050862 Ceased WO2006042999A1 (en) | 2004-10-20 | 2005-10-18 | Motor vehicle hood with a reinforced liner |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2876653A1 (en) |
| WO (1) | WO2006042999A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1975043A1 (en) * | 2007-03-28 | 2008-10-01 | Peugeot Citroën Automobiles S.A. | Motor vehicle hood provided with a reinforced lining [2007/26] |
| GB2499034A (en) * | 2012-02-06 | 2013-08-07 | Jaguar Cars | Vehicle bonnet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5706908A (en) * | 1994-04-18 | 1998-01-13 | Nissan Motor Co., Ltd. | Front upper structure of automotive vehicle |
| JP2005104274A (en) * | 2003-09-30 | 2005-04-21 | Toyota Motor Corp | Vehicle hood structure |
| JP2005193871A (en) * | 2004-01-09 | 2005-07-21 | Honda Motor Co Ltd | Automotive hood structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19846192A1 (en) * | 1998-10-07 | 2000-04-13 | Volkswagen Ag | Body hood, in particular engine compartment hood of a motor vehicle |
-
2004
- 2004-10-20 FR FR0411132A patent/FR2876653A1/en active Pending
-
2005
- 2005-10-18 WO PCT/FR2005/050862 patent/WO2006042999A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5706908A (en) * | 1994-04-18 | 1998-01-13 | Nissan Motor Co., Ltd. | Front upper structure of automotive vehicle |
| JP2005104274A (en) * | 2003-09-30 | 2005-04-21 | Toyota Motor Corp | Vehicle hood structure |
| JP2005193871A (en) * | 2004-01-09 | 2005-07-21 | Honda Motor Co Ltd | Automotive hood structure |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1975043A1 (en) * | 2007-03-28 | 2008-10-01 | Peugeot Citroën Automobiles S.A. | Motor vehicle hood provided with a reinforced lining [2007/26] |
| FR2914266A1 (en) * | 2007-03-28 | 2008-10-03 | Peugeot Citroen Automobiles Sa | HOOD WITH REINFORCED LINING FOR VEHICLE. |
| GB2499034A (en) * | 2012-02-06 | 2013-08-07 | Jaguar Cars | Vehicle bonnet |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2876653A1 (en) | 2006-04-21 |
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