EP3713818A1 - Movable rear diffuser for a motor vehicle, comprising a translating panel - Google Patents

Movable rear diffuser for a motor vehicle, comprising a translating panel

Info

Publication number
EP3713818A1
EP3713818A1 EP18807625.1A EP18807625A EP3713818A1 EP 3713818 A1 EP3713818 A1 EP 3713818A1 EP 18807625 A EP18807625 A EP 18807625A EP 3713818 A1 EP3713818 A1 EP 3713818A1
Authority
EP
European Patent Office
Prior art keywords
panel
primary
diffuser
vehicle
part according
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.)
Withdrawn
Application number
EP18807625.1A
Other languages
German (de)
French (fr)
Inventor
Jérôme UTTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plastic Omnium SE
Original Assignee
Plastic Omnium SE
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 Plastic Omnium SE filed Critical Plastic Omnium SE
Publication of EP3713818A1 publication Critical patent/EP3713818A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/007—Rear spoilers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
    • B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/02—Streamlining the undersurfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/82—Elements for improving aerodynamics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

Definitions

  • the invention relates to the rear diffusers of motor vehicles and more particularly the movable rear diffusers.
  • the rear diffuser is a part that can be present in the rear of a motor vehicle, more precisely under the frame or in the lower part of the bumper, and for the purpose of improving the aerodynamic performance of the vehicle. It may for example be to improve the ground support of the vehicle.
  • Some diffusers allow them to improve the aerodynamic performance of the vehicle by reducing the drag of the vehicle, that is to say the force opposing the movement of the vehicle in the air. It is a question of shifting back the points of separation of the air with respect to the vehicle, that is to say the points at which the air does not follow the body any more. This allows to push back the depression created at the rear of the vehicle and thus limit the effect of restraint (called “suction effect”) of this depression on the motor vehicle.
  • the diffuser in its deployed position, the diffuser reveals major openings between the movable panel and the rear bumper of the vehicle. Indeed, it appears a central opening between the body part and the diffuser panel, and two side openings on each side of the panel.
  • These openings may allow many types of foreign bodies to enter the device. These foreign bodies can be dust, mud, snow in winter weather, or any other type of dirt. These foreign bodies can, in sufficient quantity, block the closure of the device.
  • the diffuser In case of mud or snow, the diffuser can be locked in the deployed position. Similarly, dust can become dirty and damage the mechanical elements necessary for deployment and retraction of the mobile panel.
  • the diffuser can no longer improve the aerodynamic performance of the vehicle, and requires maintenance and / or replacement that can be expensive. Then, these openings can be perceived as being
  • SUBSTITUTE SHEET (RULE 26) unsightly for the motorist, as it affects the overall appearance of the vehicle. Thus, such a device can affect the perceived quality of the vehicle as a whole.
  • Another solution is to use a soft cover component between the movable panel of the diffuser and the bumper of the vehicle.
  • This component closes the opening left when the diffuser is deployed.
  • dirt dirt, mud or other
  • the appearance of such a flexible component can adversely affect the quality perceived by the user and deteriorate the aesthetics of the vehicle.
  • This component can also vibrate more easily than a rigid panel and cause noise.
  • such a flexible component has a low resistance to fatigue caused by many cycles of opening and closing the panel.
  • Another solution consists in using two panels each guided in rotation relative to the bodywork part to which they are each fixed by one of their ends.
  • the first panel acts as a diffuser and the second serves to obstruct the central opening between the first and the body.
  • the panel obstructing the opening is partly hidden behind the first panel when the diffuser is in the retracted position. Thus, part of this panel is visible in this position, which affects the aesthetics of the vehicle.
  • the invention aims to overcome these disadvantages by providing a vehicle body part comprising a rear diffuser not clogging and thus limiting the risk of failure of the device.
  • the invention also aims to provide a vehicle rear diffuser does not detract from the aesthetics of the vehicle (particularly in the deployed position), thus having no adverse impact on the quality perceived by the motorist.
  • the invention relates to a motor vehicle body part which comprises a rear diffuser comprising at least one primary panel and at least one secondary panel, each of these panels being movable between an extended position and a retracted position, characterized in that when the bodywork part is fixed on a motor vehicle, the secondary panel is completely invisible from the outside in the retracted position and obstructs an opening between the bodywork part and the primary panel in the deployed position, the secondary panel being mechanically connected to an upper part of the bodywork part.
  • the secondary panel obstructs, at least partially an opening created during deployment between the primary panel and the rest of the bodywork part of the vehicle. When it is deployed, three openings are created, a central unit between the primary panel and the bodywork part, and two lateral ones on the sides of the body.
  • SUBSTITUTE SHEET (RULE 26) primary panel.
  • the secondary panel obstructs the central opening.
  • the occupation of this opening by the secondary panel makes it possible to prevent a foreign body from penetrating inside the rear diffuser.
  • dirt such as mud, dust, snow, or any other type of dirt, can not enter the device, and therefore can not interfere with the proper functioning of it.
  • the invention thus makes it possible to reduce the maintenance operations, or the wear of the parts of the device by protecting it from dirt.
  • this secondary panel allows, when the diffuser is in the deployed position, to obstruct a gap that was created with the deployment of the primary panel. In this way, the body part retains a harmonious appearance, due to the absence of a gaping hole in the middle of it. This absence of hole improves the overall aesthetics of the vehicle, and consequently improves the quality perceived by the user.
  • the relative positioning of the primary and secondary panels, with a secondary panel which is entirely housed inside the vehicle in the retracted position, makes it possible to have a primary panel over the entire surface of the opening of the bodywork part. This is advantageous from an aesthetic point of view when the rear diffuser is in the retracted position.
  • the secondary panel is hidden in the retracted position, so it is protected from dirt and shocks to which it would otherwise be subjected in this position. It therefore retains a good surface condition, which benefits the aesthetics of the diffuser.
  • the secondary panel is disposed behind the primary panel when the diffuser is in the retracted position.
  • This arrangement provides an optimal compactness of the diffuser, making its integration into a body part (typically a rear bumper) easy, because of the small space occupied.
  • the bodywork part may comprise one or more of the following features, taken alone or in combination:
  • an end point of the secondary panel performs a linear translational movement relative to the primary panel or any other movement in which the end point remains at a substantially constant distance from the primary panel, when the diffuser moves from its retracted position to its deployed position and vice versa, so as to limit as far as possible a distance between the two panels;
  • the secondary panel performs a simple rotational movement relative to the body part with which the panel is bound;
  • the primary panel is devoid of a direct mechanical connection with the secondary panel
  • the secondary panel is connected to the primary panel via a translation element able to translate on the primary panel;
  • the secondary panel is connected to the primary panel by an annular linear connection
  • the primary panel may have a complex shape on its inner side allowing the secondary panel to follow it to the nearest, limiting the space between the two parts during movement;
  • the bodywork part comprises a motorized mechanism adapted to allow the deployment and retraction of the primary and secondary panels;
  • the bodywork part comprises several primary panels, for example three;
  • the bodywork part comprises several secondary panels, for example three;
  • the body part is a rear bumper
  • the secondary panel is able to prevent the intrusion of foreign bodies between the bodywork part and the primary panel;
  • the primary panel and the secondary panel each have an inner face facing the vehicle, an outer face facing the outside of the vehicle, the outer face of the secondary panel being opposite the inner face of the primary panel when the diffuser is in the retracted position.
  • FIG. 1 is a sectional view along a first plane of a rear lower end of a motor vehicle comprising a rear diffuser according to the invention, the rear diffuser being in the deployed position;
  • FIG. 2 is a sectional view along the first plane of a rear lower end of a motor vehicle comprising a rear diffuser according to the invention, the rear diffuser being in the retracted position.
  • the figures show a rear diffuser in its configuration mounted on a body part of a motor vehicle, specifically a rear bumper of a motor vehicle.
  • FIGs 1 and 2 illustrate a rear diffuser 10, for example made of plastic, of a motor vehicle mounted on a vehicle body part, here a rear bumper 40, for example also made of plastic, comprising a panel 20 and at least one secondary panel 30, each of these panels being movable between an extended position (illustrated in Figure 1) and a retracted position (illustrated in Figure 2) when the rear diffuser 10 is fixed on the bodywork part (in this case the rear bumper 40).
  • the secondary panel 30 obstructs an opening 50 in the bodywork part when the diffuser 10 is in the deployed position.
  • the diffuser 10 is therefore able to move from an extended position shown in FIG. 1 to a retracted position shown in FIG.
  • the bumper 40 of the vehicle comprises an upper portion 42 and a lower portion 44.
  • An opening 50 is arranged between these two parts of the bumper 40.
  • the primary panel 20 In the retracted position, the primary panel 20 is pressed against the bumper 40 of the vehicle and completely obstructs the opening 50 located therein, located between the upper portion 42 and the lower portion 44.
  • This panel 20 has a concavity on its outer face, here shown facing downwards, relative to the vertical axis z of the vehicle. This concavity may be more marked than in FIGS. 1 and 2.
  • This panel may also have a more complex profile, or have a straight profile.
  • a secondary panel 30 is connected to the upper part 42 of the bumper 40. This connection is made in the form of a pivot between these two parts.
  • the secondary panel 30 is free in simple rotation relative to the bodywork part. Such relative movement between these parts being simple to operate, this has the advantage of facilitating the design of the diffuser 10, and also to facilitate its maintenance and allow operation with a less bulky system
  • the secondary panel 30 has an inner face 32 which faces the vehicle when the bodywork part is mounted on it, and an outer face 34 which faces outwards.
  • the primary panel 20 has an internal face 22 facing the vehicle when the bodywork part is mounted on a vehicle, and an outer face 24.
  • the outer face 34 of the panel secondary 30 is opposite the inner face 22 of the primary panel 20.
  • the diffuser 10 occupies a small space when it is in the retracted position in the bodywork part, which facilitates its integration into the vehicle.
  • the shape of the secondary panel 30 is intended to marry at
  • the secondary panel 30 is connected to the primary panel 20 via a translation element 38.
  • This element attached to the secondary panel 30 can be connected to the primary panel with a slide (not shown).
  • the movement of one of the two panels 20, 30 can cause the movement of the other panel 20, 30.
  • This advantageously makes it possible to actuate the deployment and retraction of the diffuser 10 by actuating only one of the two panels, namely the primary 20, the secondary 30.
  • it facilitates the maintenance and manufacture of the diffuser 10, and makes it less expensive, more compact, and lighter.
  • the primary panel 20 is devoid of mechanical connection with the secondary panel 30.
  • this makes it possible to economize a connection between the panels 20, 30.
  • this makes it possible to have primary and secondary panels 30 which are never in contact with each other, whether in the extended or retracted position or between these two positions. This absence of contact prevents friction between these two parts 20, 30 and thus prevent wear on the inner surface 22 of the primary panel 20 and the outer surface 34 of the secondary panel 30.
  • the outer surface 34 of the secondary panel is preserved and retains a good aesthetic appearance.
  • Deployment and retraction of the primary 20 and secondary 30 panels of the diffuser 10 may be achieved via one or more rotary or translational actuators (not shown) associated with a kinematic or direct drive assembly.
  • rotary or translational actuators (not shown) associated with a kinematic or direct drive assembly.
  • actuation modes are feasible, be it a mechanical actuator, pneumatic, electrical or hydraulic.
  • a mechanical actuator it can be adapted on demand to a kinematic assembly, for example with a connecting rod-crank system, or a return by one or more spring (s) for example.
  • the actuator may cause the movement of the primary panel 20, which will then drive the secondary panel 30 through the translation member 38.
  • the actuator can cause the movement of the primary panel 20, which will then drive the secondary panel 30 through the translation member 38.
  • the actuator can cause the movement of the primary panel 20, which will then drive the secondary panel 30 through the translation member 38.
  • SUBSTITUTE SHEET (RULE 26) driving the secondary panel 30 which drives the translation member 38 which subsequently drives the primary panel 20.
  • the actuator can drive the translation member 38, which will drive the two panels with him.
  • the actuator can also drive the secondary panel 30 being connected to the pivot connection 36, the secondary panel then driving the translation member 38 which itself drives the primary panel. Having a single actuation for both panels is particularly advantageous because it makes it possible to use only one actuating device. This makes the system less expensive, easier to assemble, and easier to maintain.
  • the two panels 20, 30 may each have an actuating device, and be controlled simultaneously.
  • the primary panel 20 when the diffuser 10 is in the deployed position, the primary panel 20 is oriented horizontally and no longer obstructs the opening of the bumper 50 alone.
  • the secondary panel 30 is oriented almost perpendicularly to the primary panel 20.
  • the assembly of the secondary panel 30 and the primary panel 20 at least partially obstructs an opening of the bumper 50.
  • the deployment of the primary panel 20 creates three openings, one central between the primary panel and the bumper 50, and two lateral sides (along the Y axis and not shown here) of the primary panel 20.
  • the secondary panel 30 obstructs the central opening 50, when the diffuser 10 is in the deployed position.
  • the primary panel 20 may have a generally "U" shape allowing it to obstruct the lateral openings between the latter and the bumper 50, when the diffuser is in the deployed position.
  • the primary panel 20 completely obstructs an opening in the bumper 40, so that the internal space of the diffuser 70, located between the primary panel and the axis motor 62 of the device, is protected from dirt of all kinds, such as mud, snow or dust, or any other type of foreign bodies to the vehicle.
  • the diffuser 10 is able to direct the air from the underbody of the vehicle towards the rear of the latter, and thus to shift back the points of separation of the air with respect to the vehicle. that is to say the points at which the air no longer follows the bodywork. This helps push back the depression to
  • the actuator drives the movement of primary and secondary panels 30 (as previously described).
  • the secondary panel 30 performs a simple rotational movement with respect to the upper portion 42 of the bumper 40.
  • the primary panel 20 also moves to come into the deployed position. It can perform any kind of movement to come into this position, for example a movement consisting of several rotations and translations relative to the rear bumper 40 of the vehicle.
  • an end point of the secondary panel 30, which may for example coincide with the translation element 38, translates relative to the primary panel 20.
  • the secondary panel 30 is placed in position. in order to obstruct a central opening between the upper part of the bumper 42 and the primary panel 20 of the diffuser.
  • the internal space 70 of the diffuser is sheltered from any dirt that might have been introduced otherwise.
  • dirt such as mud, snow, dust or other does not obstruct the internal space of the diffuser 70, which would prevent the retraction thereof.
  • the secondary panel 30 performs a combined movement of several simultaneous rotations around different axes of rotation relative to the body part 40 to which it is connected. This movement can be ensured by means of one or more connecting rods connecting the secondary panel 30 and the upper part of the bumper 42. This trajectory may allow, for example, to limit as much as possible the space between the two panels. during deployment and retraction.
  • This particular kinematics of the secondary panel 30 has many advantages.
  • the actuator for the deployment and retraction of the diffuser 10 is protected from soiling.
  • the risk of blocking the device is greatly reduced.
  • the wear of the mechanical elements of the diffuser 10 is greatly reduced by their protection against soiling.
  • using a rigid secondary panel 30, which can be painted (especially in the same shade as the rest of the vehicle), allows to give an aesthetic diffuser 10 which is consistent with the rest of the vehicle.
  • such a rigid panel 30 has a much better
  • SUBSTITUTE SHEET (RULE 26) resistance to fatigue than using, for example, a flexible element.
  • the diffuser may for example have several secondary panels, for example three. This allows the diffuser to marry the concave shape of the body part, the bumpers of the vehicles often having curved shapes, while having three panels each having a low concavity. This has a definite advantage in terms of the compactness of the diffuser once in the retracted position, because a single secondary panel has a concavity that would make it occupy a larger space once retracted, which would make the system very bulky to house it behind the bumper -chocs.
  • the diffuser may comprise several primary panels, for example three.
  • the diffuser may have a greater concavity, which is particularly advantageous, especially when the body part has a strong concavity.
  • the rear diffuser can, instead of being inserted into an opening of the rear bumper of the vehicle, be inserted between a rear bumper and a sill of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a motor vehicle bodywork part comprising a rear diffuser (10) having at least one primary panel (20) and at least one secondary panel (30), each of said panels (20, 30) being movable between a deployed position and a retracted position. When the bodywork part is attached to a motor vehicle, the secondary panel (30) is completely non-visible from the outside in a retracted position and obstructs an opening (50) between the bodywork part and the primary panel (20) in the deployed position, said secondary panel (30) being mechanically connected to an upper part (42) of the bodywork part.

Description

Diffuseur arrière mobile de véhicule à panneau arrière translatant  Movable rear rear wheel vehicle diffuser
L’invention concerne les diffuseurs arrière de véhicules automobiles et plus particulièrement les diffuseurs arrière mobiles. The invention relates to the rear diffusers of motor vehicles and more particularly the movable rear diffusers.
Le diffuseur arrière est une pièce pouvant être présente à l'arrière d'un véhicule automobile, plus précisément sous le châssis ou bien en partie basse du pare-chocs, et ayant pour but d'améliorer les performances aérodynamiques du véhicule. Il peut par exemple s’agir d’améliorer l’appui au sol du véhicule.  The rear diffuser is a part that can be present in the rear of a motor vehicle, more precisely under the frame or in the lower part of the bumper, and for the purpose of improving the aerodynamic performance of the vehicle. It may for example be to improve the ground support of the vehicle.
Certains diffuseurs permettent quant à eux d’améliorer les performances aérodynamiques du véhicule en réduisant la traînée du véhicule, c’est-à-dire la force s’opposant au mouvement du véhicule dans l’air. Il s’agit de décaler vers l’arrière les points de décollement de l’air par rapport au véhicule, c’est-à-dire les points au niveau desquels l’air ne suit plus la carrosserie. Cela permet de repousser vers l’arrière la dépression se créant à l’arrière du véhicule et ainsi limiter l’effet de retenue (appelé « effet de succion ») de cette dépression sur le véhicule automobile.  Some diffusers allow them to improve the aerodynamic performance of the vehicle by reducing the drag of the vehicle, that is to say the force opposing the movement of the vehicle in the air. It is a question of shifting back the points of separation of the air with respect to the vehicle, that is to say the points at which the air does not follow the body any more. This allows to push back the depression created at the rear of the vehicle and thus limit the effect of restraint (called "suction effect") of this depression on the motor vehicle.
Les solutions actuelles consistent en un diffuseur arrière comprenant un panneau mobile en rotation entre une position rétractée et une position déployée lorsque le véhicule est en mouvement. La rotation de la position déployée à la position rétractée permet de repousser vers l’arrière les points de décollement de l’air et ainsi réduire la traînée du véhicule automobile comme expliqué auparavant. Le panneau mobile est déployé à partir d’une certaine vitesse afin de diminuer la traînée du véhicule et peut-être replié à haute vitesse.  Current solutions consist of a rear diffuser comprising a panel movable in rotation between a retracted position and an extended position when the vehicle is in motion. The rotation of the deployed position to the retracted position makes it possible to push back the air separation points and thus reduce the drag of the motor vehicle as explained previously. The mobile panel is deployed from a certain speed to reduce vehicle drag and can be folded at high speed.
Ce dispositif permet efficacement de réduire la traînée du véhicule. Cependant, dans sa position déployée, le diffuseur laisse apparaître des ouvertures importantes entre le panneau mobile et le pare-chocs arrière du véhicule. En effet, il apparaît une ouverture centrale entre la pièce de carrosserie et le panneau du diffuseur, ainsi que deux ouvertures latérales de chaque côté du panneau. La présence de ces ouvertures entraîne plusieurs inconvénients. Premièrement, ces ouvertures peuvent laisser pénétrer de nombreux types de corps étrangers dans le dispositif. Ces corps étrangers peuvent être de la poussière, de la boue, la neige par temps d’hiver, ou tout autre type de salissure. Ces corps étrangers peuvent, en quantité suffisante, bloquer la fermeture du dispositif. En cas de boue ou de neige, le diffuseur peut ainsi être bloqué en position déployée. De même, de la poussière peut venir encrasser puis endommager les éléments mécaniques nécessaires au déploiement et à la rétractation du panneau mobile. Ainsi bloqué en position déployée ou fermée, le diffuseur ne peut plus améliorer les performances aérodynamiques du véhicule, et nécessite une maintenance et/ou un remplacement qui peuvent être coûteux. Ensuite, ces ouvertures peuvent être perçues comme étant  This device effectively reduces the drag of the vehicle. However, in its deployed position, the diffuser reveals major openings between the movable panel and the rear bumper of the vehicle. Indeed, it appears a central opening between the body part and the diffuser panel, and two side openings on each side of the panel. The presence of these openings has several disadvantages. First, these openings may allow many types of foreign bodies to enter the device. These foreign bodies can be dust, mud, snow in winter weather, or any other type of dirt. These foreign bodies can, in sufficient quantity, block the closure of the device. In case of mud or snow, the diffuser can be locked in the deployed position. Similarly, dust can become dirty and damage the mechanical elements necessary for deployment and retraction of the mobile panel. Thus blocked in the deployed or closed position, the diffuser can no longer improve the aerodynamic performance of the vehicle, and requires maintenance and / or replacement that can be expensive. Then, these openings can be perceived as being
FEUILLE DE REMPLACEMENT (RÈGLE 26) disgracieuses pour l’automobiliste, car nuisant à l’esthétique générale du véhicule. Ainsi, un tel dispositif peut nuire à la qualité perçue du véhicule dans son ensemble. SUBSTITUTE SHEET (RULE 26) unsightly for the motorist, as it affects the overall appearance of the vehicle. Thus, such a device can affect the perceived quality of the vehicle as a whole.
Une autre solution consiste à utiliser un composant de couverture souple entre le panneau mobile du diffuseur et le pare-chocs du véhicule. Ce composant permet d’obstruer l’ouverture laissée lorsque le diffuseur est déployé. Par contre, un tel dispositif n’est pas optimal car de la salissure (neige, boue ou autre) peut se glisser dans les plis du composant souple lorsque le diffuseur se rétracte, pouvant provoquer un blocage du diffuseur. De plus, l’aspect extérieur d’un tel composant souple peut nuire à la qualité perçue par l’utilisateur et détériorer l’esthétique du véhicule. Ce composant peut aussi vibrer plus facilement qu’un panneau rigide et provoquer des nuisances sonores. Enfin, un tel composant flexible possède une faible résistance à la fatigue provoquée par de nombreux cycles d’ouverture et fermeture du panneau.  Another solution is to use a soft cover component between the movable panel of the diffuser and the bumper of the vehicle. This component closes the opening left when the diffuser is deployed. By cons, such a device is not optimal because of dirt (snow, mud or other) can slip into the folds of the flexible component when the diffuser retracts, which can cause a blockage of the diffuser. In addition, the appearance of such a flexible component can adversely affect the quality perceived by the user and deteriorate the aesthetics of the vehicle. This component can also vibrate more easily than a rigid panel and cause noise. Finally, such a flexible component has a low resistance to fatigue caused by many cycles of opening and closing the panel.
Une autre solution, décrite notamment dans le document US 2017/0036710, consiste à utiliser deux panneaux guidés chacun en rotation par rapport à la pièce de carrosserie sur laquelle ils sont fixés chacun par l’une de leurs extrémités. Le premier panneau agit en tant que diffuseur et le deuxième sert à obstruer l’ouverture centrale entre le premier et la carrosserie. Dans ce dispositif le panneau obstruant l’ouverture est en partie caché derrière le premier panneau lorsque le diffuseur est en position rétractée. Ainsi, une partie de ce panneau est visible dans cette position, ce qui nuit à l’esthétique du véhicule.  Another solution, described in particular in the document US 2017/0036710, consists in using two panels each guided in rotation relative to the bodywork part to which they are each fixed by one of their ends. The first panel acts as a diffuser and the second serves to obstruct the central opening between the first and the body. In this device the panel obstructing the opening is partly hidden behind the first panel when the diffuser is in the retracted position. Thus, part of this panel is visible in this position, which affects the aesthetics of the vehicle.
L’invention a pour but de remédier à ces inconvénients en proposant une pièce de carrosserie de véhicule comprenant un diffuseur arrière ne s’encrassant pas et ainsi limitant les risques de panne du dispositif. L’invention a aussi pour but de fournir un diffuseur arrière de véhicule ne nuisant pas à l’esthétique du véhicule (en particulier en position déployée), n’ayant ainsi pas d’impact néfaste sur la qualité perçue par l’automobiliste.  The invention aims to overcome these disadvantages by providing a vehicle body part comprising a rear diffuser not clogging and thus limiting the risk of failure of the device. The invention also aims to provide a vehicle rear diffuser does not detract from the aesthetics of the vehicle (particularly in the deployed position), thus having no adverse impact on the quality perceived by the motorist.
L’invention a pour objet une pièce de carrosserie de véhicule automobile qui comprend un diffuseur arrière comprenant au moins un panneau primaire et au moins un panneau secondaire, chacun de ces panneaux étant mobile entre une position déployée et une position rétractée, caractérisée en ce que lorsque la pièce de carrosserie est fixée sur un véhicule automobile, le panneau secondaire est complètement non visible de l’extérieur en position rétractée et obstrue une ouverture entre la pièce de carrosserie et le panneau primaire en position déployée, le panneau secondaire étant lié mécaniquement à une partie supérieure de la pièce de carrosserie.  The invention relates to a motor vehicle body part which comprises a rear diffuser comprising at least one primary panel and at least one secondary panel, each of these panels being movable between an extended position and a retracted position, characterized in that when the bodywork part is fixed on a motor vehicle, the secondary panel is completely invisible from the outside in the retracted position and obstructs an opening between the bodywork part and the primary panel in the deployed position, the secondary panel being mechanically connected to an upper part of the bodywork part.
Ainsi, le panneau secondaire vient obstruer, au moins partiellement une ouverture créée lors du déploiement entre le panneau primaire et le reste de la pièce de carrosserie du véhicule. Lors du son déploiement, trois ouvertures sont créées, une centrale entre le panneau primaire et la pièce de carrosserie, et deux latérales situées sur les côtés du  Thus, the secondary panel obstructs, at least partially an opening created during deployment between the primary panel and the rest of the bodywork part of the vehicle. When it is deployed, three openings are created, a central unit between the primary panel and the bodywork part, and two lateral ones on the sides of the body.
FEUILLE DE REMPLACEMENT (RÈGLE 26) panneau primaire. Ici, le panneau secondaire vient obstruer l’ouverture centrale. L’occupation de cette ouverture par le panneau secondaire permet d’empêcher un corps étranger de pénétrer à l’intérieur du diffuseur arrière. Ainsi, des salissures comme de la boue, de la poussière, de la neige, ou tout autre type de salissures, ne peuvent pas pénétrer dans le dispositif, et donc ne peuvent venir gêner le bon fonctionnement de celui-ci. L’invention permet donc de diminuer les opérations de maintenance, ou l’usure des pièces du dispositif en le protégeant des salissures. SUBSTITUTE SHEET (RULE 26) primary panel. Here, the secondary panel obstructs the central opening. The occupation of this opening by the secondary panel makes it possible to prevent a foreign body from penetrating inside the rear diffuser. Thus, dirt such as mud, dust, snow, or any other type of dirt, can not enter the device, and therefore can not interfere with the proper functioning of it. The invention thus makes it possible to reduce the maintenance operations, or the wear of the parts of the device by protecting it from dirt.
De plus, la présence de ce panneau secondaire permet, lorsque le diffuseur est en position déployée, d’obstruer un interstice qui s’est créé avec le déploiement du panneau primaire. De cette manière, la pièce de carrosserie conserve une apparence harmonieuse, de par l’absence d’un trou béant en plein milieu de celui-ci. Cette absence de trou permet d’améliorer l’esthétique globale du véhicule, et permet par voie de conséquence de bonifier la qualité perçue par l’utilisateur.  In addition, the presence of this secondary panel allows, when the diffuser is in the deployed position, to obstruct a gap that was created with the deployment of the primary panel. In this way, the body part retains a harmonious appearance, due to the absence of a gaping hole in the middle of it. This absence of hole improves the overall aesthetics of the vehicle, and consequently improves the quality perceived by the user.
Le positionnement relatif des panneaux primaire et secondaire, avec un panneau secondaire qui se loge entièrement à l’intérieur du véhicule en position rétractée, permet d’avoir un panneau primaire sur toute la surface de l’ouverture de la pièce de carrosserie. Ceci est avantageux d’un point de vue esthétique lorsque le diffuseur arrière est en position rétractée. De plus, le panneau secondaire étant caché en position rétractée, il est donc protégé des salissures et des chocs auxquels il serait autrement soumis dans cette position. Il conserve donc un bon état de surface, ce qui profite à l’esthétique du diffuseur.  The relative positioning of the primary and secondary panels, with a secondary panel which is entirely housed inside the vehicle in the retracted position, makes it possible to have a primary panel over the entire surface of the opening of the bodywork part. This is advantageous from an aesthetic point of view when the rear diffuser is in the retracted position. In addition, the secondary panel is hidden in the retracted position, so it is protected from dirt and shocks to which it would otherwise be subjected in this position. It therefore retains a good surface condition, which benefits the aesthetics of the diffuser.
Enfin, le panneau secondaire est disposé derrière le panneau primaire quand le diffuseur est en position rétractée. Cette disposition permet d’obtenir une compacité optimale du diffuseur, rendant son intégration dans une pièce de carrosserie (typiquement un pare-chocs arrière) aisée, en raison du peu d’espace occupé.  Finally, the secondary panel is disposed behind the primary panel when the diffuser is in the retracted position. This arrangement provides an optimal compactness of the diffuser, making its integration into a body part (typically a rear bumper) easy, because of the small space occupied.
La pièce de carrosserie peut comporter l’une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison :  The bodywork part may comprise one or more of the following features, taken alone or in combination:
- un point d’extrémité du panneau secondaire effectue un mouvement de translation linéaire par rapport au panneau primaire ou tout autre mouvement dans lequel le point d’extrémité reste à une distance sensiblement constante du panneau primaire, lorsque le diffuseur passe de sa position rétractée à sa position déployée et inversement, de manière à limiter au maximum une distance entre les deux panneaux ;  an end point of the secondary panel performs a linear translational movement relative to the primary panel or any other movement in which the end point remains at a substantially constant distance from the primary panel, when the diffuser moves from its retracted position to its deployed position and vice versa, so as to limit as far as possible a distance between the two panels;
- le panneau secondaire effectue un mouvement de rotation simple par rapport à la pièce de carrosserie avec laquelle le panneau est lié ;  - The secondary panel performs a simple rotational movement relative to the body part with which the panel is bound;
- le panneau secondaire et la partie supérieure de la pièce de carrosserie sont liés par une liaison pivot ;  - The secondary panel and the upper part of the bodywork part are connected by a pivot connection;
- le panneau secondaire effectue un mouvement combiné de plusieurs rotations  - the secondary panel performs a combined movement of several rotations
FEUILLE DE REMPLACEMENT (RÈGLE 26) simultanées autour de différents axes de rotation par rapport à la pièce de carrosserie à laquelle il est lié ; SUBSTITUTE SHEET (RULE 26) simultaneous around different axes of rotation relative to the body part to which it is linked;
- le panneau secondaire et la partie supérieure de la pièce de carrosserie sont liés par au moins une bielle ;  - The secondary panel and the upper part of the bodywork part are connected by at least one connecting rod;
- le panneau primaire est dépourvu d’une liaison mécanique directe avec le panneau secondaire ;  - The primary panel is devoid of a direct mechanical connection with the secondary panel;
- les panneaux primaire et secondaire ne sont jamais en contact l’un avec l’autre ; - the primary and secondary panels are never in contact with each other;
- le panneau secondaire est lié au panneau primaire via un élément de translation apte à translater sur le panneau primaire ; the secondary panel is connected to the primary panel via a translation element able to translate on the primary panel;
- le panneau secondaire est lié au panneau primaire par une liaison linéaire annulaire ; the secondary panel is connected to the primary panel by an annular linear connection;
- le panneau primaire peut présenter une forme complexe sur sa face interne permettant au panneau secondaire de le suivre au plus proche, limitant ainsi l’espace entre les 2 pièces durant le mouvement ; - The primary panel may have a complex shape on its inner side allowing the secondary panel to follow it to the nearest, limiting the space between the two parts during movement;
- la pièce de carrosserie comprend un mécanisme motorisé apte à permettre le déploiement et la rétractation des panneaux primaire et secondaire ;  - The bodywork part comprises a motorized mechanism adapted to allow the deployment and retraction of the primary and secondary panels;
- la pièce de carrosserie comprend plusieurs panneaux primaires, par exemple trois ; the bodywork part comprises several primary panels, for example three;
- la pièce de carrosserie comprend plusieurs panneaux secondaires, par exemple trois ; the bodywork part comprises several secondary panels, for example three;
- la pièce de carrosserie est un pare-chocs arrière ;  - the body part is a rear bumper;
- le panneau secondaire est apte à éviter l’intrusion de corps étrangers entre la pièce de carrosserie et le panneau primaire ;  the secondary panel is able to prevent the intrusion of foreign bodies between the bodywork part and the primary panel;
- lorsque la pièce de carrosserie est montée sur un véhicule, le panneau primaire et le panneau secondaire comportent chacun une face interne tournée vers le véhicule, une face externe tournée vers l’extérieur du véhicule, la face externe du panneau secondaire étant en regard de la face interne du panneau primaire lorsque le diffuseur est en position rétractée.  - When the bodywork part is mounted on a vehicle, the primary panel and the secondary panel each have an inner face facing the vehicle, an outer face facing the outside of the vehicle, the outer face of the secondary panel being opposite the inner face of the primary panel when the diffuser is in the retracted position.
L’invention sera mieux comprise à la lecture des figures annexées, qui sont fournies à titre d’exemple et ne présentent aucun caractère limitatif, dans lesquelles :  The invention will be better understood on reading the appended figures, which are provided by way of example and are in no way limiting, in which:
- la figure 1 est une vue en coupe suivant un premier plan d’une extrémité inférieure arrière d’un véhicule automobile comprenant un diffuseur arrière selon l’invention, le diffuseur arrière étant en position déployée ;  - Figure 1 is a sectional view along a first plane of a rear lower end of a motor vehicle comprising a rear diffuser according to the invention, the rear diffuser being in the deployed position;
- la figure 2 est une vue en coupe suivant le premier plan d’une extrémité inférieure arrière d’un véhicule automobile comprenant un diffuseur arrière selon l’invention, le diffuseur arrière étant en position rétractée.  - Figure 2 is a sectional view along the first plane of a rear lower end of a motor vehicle comprising a rear diffuser according to the invention, the rear diffuser being in the retracted position.
Les figures représentent un diffuseur arrière dans sa configuration montée sur une pièce de carrosserie de véhicule automobile, plus précisément un pare-chocs arrière de véhicule automobile.  The figures show a rear diffuser in its configuration mounted on a body part of a motor vehicle, specifically a rear bumper of a motor vehicle.
FEUILLE DE REMPLACEMENT (RÈGLE 26) Par la suite, les termes tels que « axe longitudinal X », « axe transversal Y », « axe vertical Z », « avant », « arrière », « au- dessus », « supérieur », « en-dessous », « inferieur », etc. s’entendent par référence à l’orientation usuelle des véhicules automobiles selon le repère représenté sur la figure 1. SUBSTITUTE SHEET (RULE 26) Subsequently, the terms such as "longitudinal axis X", "transverse axis Y", "vertical axis Z", "front", "rear", "above", "upper", "below", "Inferior", etc. are understood by reference to the usual orientation of motor vehicles according to the reference shown in Figure 1.
Les figures 1 et 2 illustrent un diffuseur arrière 10, par exemple réalisé en matière plastique, de véhicule automobile monté sur une pièce de carrosserie de véhicule, ici un pare-chocs arrière 40, par exemple lui aussi réalisé en matière plastique, comprenant un panneau primaire 20 et au moins un panneau secondaire 30, chacun de ces panneaux étant mobile entre une position déployée (illustrée en figure 1) et une position rétractée (illustrée en figure 2) lorsque le diffuseur arrière 10 est fixé sur la pièce de carrosserie (dans ce cas le pare-chocs arrière 40). Le panneau secondaire 30 obstrue une ouverture 50 dans la pièce de carrosserie, quand le diffuseur 10 est en position déployée.  Figures 1 and 2 illustrate a rear diffuser 10, for example made of plastic, of a motor vehicle mounted on a vehicle body part, here a rear bumper 40, for example also made of plastic, comprising a panel 20 and at least one secondary panel 30, each of these panels being movable between an extended position (illustrated in Figure 1) and a retracted position (illustrated in Figure 2) when the rear diffuser 10 is fixed on the bodywork part (in this case the rear bumper 40). The secondary panel 30 obstructs an opening 50 in the bodywork part when the diffuser 10 is in the deployed position.
Le diffuseur 10 est donc apte à passer d’une position déployée représentée à la figure 1 à une position rétractée représentée à la figure 2.  The diffuser 10 is therefore able to move from an extended position shown in FIG. 1 to a retracted position shown in FIG.
Le pare-chocs 40 du véhicule comprend une partie supérieure 42 et une partie inférieure 44. Une ouverture 50 est aménagée entre ces deux parties du pare-chocs 40. En position rétractée, le panneau primaire 20 est plaqué contre le pare-chocs 40 du véhicule et obstrue complètement l’ouverture 50 située dans celui-ci, située entre la partie supérieure 42 et la partie inférieure 44. Ce panneau 20 présente une concavité sur sa face externe, ici représentée orientée vers le bas, relativement à l’axe vertical z du véhicule. Cette concavité peut être plus marquée que sur les figure 1 et 2. Ce panneau peut aussi présenter un profil plus complexe, ou bien avoir un profil rectiligne. Un panneau secondaire 30 est lié à la partie supérieure 42 du pare-chocs 40. Cette liaison est réalisée sous la forme d’un pivot entre ces deux pièces. Ainsi, le panneau secondaire 30 n’est libre qu’en rotation simple par rapport à la pièce de carrosserie. Un tel mouvement relatif entre ces pièces étant simple à actionner, cela présente l’avantage de faciliter la conception du diffuseur 10, et aussi de faciliter sa maintenance et de permettre un actionnement avec un système moins volumineux.  The bumper 40 of the vehicle comprises an upper portion 42 and a lower portion 44. An opening 50 is arranged between these two parts of the bumper 40. In the retracted position, the primary panel 20 is pressed against the bumper 40 of the vehicle and completely obstructs the opening 50 located therein, located between the upper portion 42 and the lower portion 44. This panel 20 has a concavity on its outer face, here shown facing downwards, relative to the vertical axis z of the vehicle. This concavity may be more marked than in FIGS. 1 and 2. This panel may also have a more complex profile, or have a straight profile. A secondary panel 30 is connected to the upper part 42 of the bumper 40. This connection is made in the form of a pivot between these two parts. Thus, the secondary panel 30 is free in simple rotation relative to the bodywork part. Such relative movement between these parts being simple to operate, this has the advantage of facilitating the design of the diffuser 10, and also to facilitate its maintenance and allow operation with a less bulky system.
Le panneau secondaire 30 possède une face interne 32 qui est tournée vers le véhicule quand la pièce de carrosserie est montée dessus, et une face externe 34 qui est tournée vers l’extérieur. De la même façon, le panneau primaire 20 possède une face interne 22 tournée vers le véhicule quand la pièce de carrosserie est montée sur un véhicule, et une face externe 24. Quand le diffuseur 10 est en position rétractée, la face externe 34 du panneau secondaire 30 est en regard de la face interne 22 du panneau primaire 20. Grâce à cette disposition, le diffuseur 10 occupe un faible espace lorsqu’il est en position rétractée dans la pièce de carrosserie, ce qui facilite son intégration dans le véhicule. De plus, la forme du panneau secondaire 30 est prévue pour épouser au  The secondary panel 30 has an inner face 32 which faces the vehicle when the bodywork part is mounted on it, and an outer face 34 which faces outwards. In the same way, the primary panel 20 has an internal face 22 facing the vehicle when the bodywork part is mounted on a vehicle, and an outer face 24. When the diffuser 10 is in the retracted position, the outer face 34 of the panel secondary 30 is opposite the inner face 22 of the primary panel 20. With this arrangement, the diffuser 10 occupies a small space when it is in the retracted position in the bodywork part, which facilitates its integration into the vehicle. In addition, the shape of the secondary panel 30 is intended to marry at
FEUILLE DE REMPLACEMENT (RÈGLE 26) mieux celle du panneau primaire 20, en ayant la même concavité, afin d’améliorer encore la compacité du diffuseur 10 en position rétractée. SUBSTITUTE SHEET (RULE 26) better that of the primary panel 20, having the same concavity, to further improve the compactness of the diffuser 10 in the retracted position.
Le panneau secondaire 30 est lié au panneau primaire 20 par l’intermédiaire d’un élément de translation 38. Cet élément fixé au panneau secondaire 30 peut être lié au panneau primaire à l’aide d’une glissière (non représentée). Ainsi, le mouvement d’un des deux panneaux 20, 30 peut entraîner le mouvement de l’autre panneau 20, 30. Cela permet avantageusement d’actionner le déploiement et la rétractation du diffuseur 10 en actionnant un seul des deux panneaux, soit le primaire 20, soit le secondaire 30. Ceci permet de simplifier le système d’actionnement (que nous décrivons plus loin) utilisé en n’ayant besoin que d’un seul actionneur. Ainsi, cela facilite la maintenance et la fabrication du diffuseur 10, et le rend moins coûteux, plus compact, et plus léger.  The secondary panel 30 is connected to the primary panel 20 via a translation element 38. This element attached to the secondary panel 30 can be connected to the primary panel with a slide (not shown). Thus, the movement of one of the two panels 20, 30 can cause the movement of the other panel 20, 30. This advantageously makes it possible to actuate the deployment and retraction of the diffuser 10 by actuating only one of the two panels, namely the primary 20, the secondary 30. This simplifies the actuating system (which we describe later) used by requiring only one actuator. Thus, it facilitates the maintenance and manufacture of the diffuser 10, and makes it less expensive, more compact, and lighter.
Dans un autre mode de réalisation de l’invention (non représenté), le panneau primaire 20 est dépourvu de liaison mécanique avec le panneau secondaire 30. Ainsi, cela permet de réaliser l’économie d’une liaison entre les panneaux 20, 30. Dans ce cas, cela permet d’avoir des panneaux primaire 20 et secondaire 30 qui ne sont jamais en contact l’un avec l’autre, que ce soit en position déployée, rétractée ou bien entre ces deux positions. Cette absence de contact permet d’éviter un frottement entre ces deux pièces 20, 30 et donc prévenir une usure de la surfaces interne 22 du panneau primaire 20 et de la surface externe 34 du panneau secondaire 30. Cela est particulièrement avantageux pour la surface externe 34 du panneau secondaire 30, qui est visible depuis l’extérieur du véhicule quand le diffuseur 10 est en position déployée, dont l’état de surface n’est pas endommagé par les frottements avec la surface interne 22 du panneau primaire 20. Ainsi, la surface externe 34 du panneau secondaire est préservée et conserve un bon aspect esthétique. In another embodiment of the invention (not shown), the primary panel 20 is devoid of mechanical connection with the secondary panel 30. Thus, this makes it possible to economize a connection between the panels 20, 30. In this case, this makes it possible to have primary and secondary panels 30 which are never in contact with each other, whether in the extended or retracted position or between these two positions. This absence of contact prevents friction between these two parts 20, 30 and thus prevent wear on the inner surface 22 of the primary panel 20 and the outer surface 34 of the secondary panel 30. This is particularly advantageous for the external surface 34 of the secondary panel 30, which is visible from outside the vehicle when the diffuser 10 is in the deployed position, the surface condition is not damaged by friction with the inner surface 22 of the primary panel 20. Thus, the outer surface 34 of the secondary panel is preserved and retains a good aesthetic appearance.
Le déploiement et la rétractation des panneaux primaire 20 et secondaire 30 du diffuseur 10 peuvent être réalisés via un ou plusieurs actionneur(s) rotatif ou translatif (non représentés) associé(s) à un ensemble cinématique ou en prise directe. Plusieurs modes d’actionnement sont réalisables, que ce soit un actionneur mécanique, pneumatique, électrique ou hydraulique. Dans le cas d’un actionneur mécanique, celui- ci peut être adapté à la demande à un ensemble cinématique, par exemple avec un système bielle-manivelle, ou un rappel par un ou plusieurs ressort(s) par exemple. Deployment and retraction of the primary 20 and secondary 30 panels of the diffuser 10 may be achieved via one or more rotary or translational actuators (not shown) associated with a kinematic or direct drive assembly. Several actuation modes are feasible, be it a mechanical actuator, pneumatic, electrical or hydraulic. In the case of a mechanical actuator, it can be adapted on demand to a kinematic assembly, for example with a connecting rod-crank system, or a return by one or more spring (s) for example.
Le pilotage de ces panneaux (pour le déploiement et la rétractation) peut être effectué suivant plusieurs méthodes. Par exemple, l’actionneur peut entraîner le mouvement du panneau primaire 20, qui va ensuite entraîner le panneau secondaire 30 par l’intermédiaire de l’élément de translation 38. De la même façon, l’actionneur peut  The control of these panels (for deployment and retraction) can be carried out according to several methods. For example, the actuator may cause the movement of the primary panel 20, which will then drive the secondary panel 30 through the translation member 38. In the same way, the actuator can
FEUILLE DE REMPLACEMENT (RÈGLE 26) entraîner le panneau secondaire 30 qui entraîne l’élément de translation 38 qui entraîne par la suite le panneau primaire 20. De manière alternative, l’actionneur peut entraîner l’élément de translation 38, qui va entraîner les deux panneaux avec lui. Enfin, l’actionneur peut aussi entraîner le panneau secondaire 30 en étant relié à la liaison pivot 36, le panneau secondaire entraînant ensuite l’élément de translation 38 qui entraîne lui- même le panneau primaire. Avoir un actionnement unique pour les deux panneaux est particulièrement avantageux parce qu’il permet de n’utiliser qu’un seul dispositif d’actionnement. Cela rend donc le système moins coûteux, plus simple à assembler, et plus simple à maintenir. SUBSTITUTE SHEET (RULE 26) driving the secondary panel 30 which drives the translation member 38 which subsequently drives the primary panel 20. Alternatively, the actuator can drive the translation member 38, which will drive the two panels with him. Finally, the actuator can also drive the secondary panel 30 being connected to the pivot connection 36, the secondary panel then driving the translation member 38 which itself drives the primary panel. Having a single actuation for both panels is particularly advantageous because it makes it possible to use only one actuating device. This makes the system less expensive, easier to assemble, and easier to maintain.
De manière alternative, les deux panneaux 20, 30 peuvent chacun disposer d’un dispositif d’actionnement, et être pilotés de façon simultanée.  Alternatively, the two panels 20, 30 may each have an actuating device, and be controlled simultaneously.
Comme montré en figure 1 , lorsque le diffuseur 10 est en position déployée, le panneau primaire 20 est orienté horizontalement et n’obstrue plus à lui seul l’ouverture du pare-chocs 50. Le panneau secondaire 30 est orienté quasiment perpendiculairement au panneau primaire 20. L’ensemble du panneau secondaire 30 et du panneau primaire 20 obstrue, au moins partiellement une ouverture du pare-chocs 50. Le déploiement du panneau primaire 20 crée trois ouvertures, l’une centrale entre le panneau primaire et le pare-chocs 50, ainsi que deux latérales situées sur les côtés (suivant l’axe Y et non représentées ici) du panneau primaire 20. Le panneau secondaire 30 vient obstruer l’ouverture centrale 50, lorsque le diffuseur 10 est en position déployée. Dans cette position, un espace interne au diffuseur 70 est créé, et est plus étendu que lorsque le diffuseur 10 est en position rétractée (comme nous le verrons plus tard). Cet espace interne 70, est à l’abri des salissures provenant du milieu extérieur au véhicule, car l’ouverture du pare-chocs 50 est bien obstruée par le panneau primaire 20 et le panneau secondaire 30. Ainsi, les moyens d’actionnement du diffuseur 10 sont protégés, ce qui augmente la durée de vie de celui-ci. De manière avantageuse, le panneau primaire 20 peut posséder une forme générale en « U » lui permettant d’obstruer les ouvertures latérales entre celui-ci et le pare-chocs 50, lorsque le diffuseur est en position déployée. As shown in FIG. 1, when the diffuser 10 is in the deployed position, the primary panel 20 is oriented horizontally and no longer obstructs the opening of the bumper 50 alone. The secondary panel 30 is oriented almost perpendicularly to the primary panel 20. The assembly of the secondary panel 30 and the primary panel 20 at least partially obstructs an opening of the bumper 50. The deployment of the primary panel 20 creates three openings, one central between the primary panel and the bumper 50, and two lateral sides (along the Y axis and not shown here) of the primary panel 20. The secondary panel 30 obstructs the central opening 50, when the diffuser 10 is in the deployed position. In this position, a space internal to the diffuser 70 is created, and is larger than when the diffuser 10 is in the retracted position (as we will see later). This internal space 70, is protected from contamination from the outside of the vehicle, because the opening of the bumper 50 is obstructed by the primary panel 20 and the secondary panel 30. Thus, the actuating means of the diffuser 10 are protected, which increases the life of it. Advantageously, the primary panel 20 may have a generally "U" shape allowing it to obstruct the lateral openings between the latter and the bumper 50, when the diffuser is in the deployed position.
Comme montré en figure 2, lorsque le diffuseur est en position rétractée, le panneau primaire 20 obstrue complètement une ouverture située dans le pare-chocs 40, de sorte que l’espace interne du diffuseur 70, situé entre le panneau primaire et l’axe moteur 62 du dispositif, est protégé des salissures de toutes sortes, telles que de la boue, de la neige ou de poussière, ou de tout autre type de corps étrangers au véhicule. As shown in FIG. 2, when the diffuser is in the retracted position, the primary panel 20 completely obstructs an opening in the bumper 40, so that the internal space of the diffuser 70, located between the primary panel and the axis motor 62 of the device, is protected from dirt of all kinds, such as mud, snow or dust, or any other type of foreign bodies to the vehicle.
En position déployée, le diffuseur 10 est apte à diriger l’air depuis le soubassement du véhicule vers l’arrière de celui-ci, et ainsi décaler vers l’arrière les points de décollement de l’air par rapport au véhicule, c’est-à-dire les points au niveau desquels l’air ne suit plus la carrosserie. Cela permet de repousser vers l’arrière la dépression se  In the deployed position, the diffuser 10 is able to direct the air from the underbody of the vehicle towards the rear of the latter, and thus to shift back the points of separation of the air with respect to the vehicle. that is to say the points at which the air no longer follows the bodywork. This helps push back the depression to
FEUILLE DE REMPLACEMENT (RÈGLE 26) créant à l’arrière du véhicule et ainsi limiter l’effet de retenue (appelé « effet de succion ») de cette dépression sur le véhicule automobile. De ce fait, le diffuseur 10 permet de diminuer la force de traînée lorsqu’il est déployé. SUBSTITUTE SHEET (RULE 26) creating the rear of the vehicle and thus limit the effect of restraint (called "suction effect") of this depression on the motor vehicle. As a result, the diffuser 10 makes it possible to reduce the drag force when it is deployed.
Nous allons maintenant décrire le déploiement et la rétractation du diffuseur 10 des figures 1 et 2. We will now describe the deployment and retraction of the diffuser 10 of Figures 1 and 2.
Lors du déploiement, le dispositif d’actionnement entraîne le mouvement des panneaux primaire 20 et secondaire 30 (comme nous l’avons décrit précédemment). Ainsi, le panneau secondaire 30 effectue un mouvement de rotation simple par rapport à la partie supérieure 42 du pare-chocs 40. De manière simultanée le panneau primaire 20 effectue lui aussi un mouvement pour venir en position déployée. Il peut effectuer toute sorte de mouvement pour venir dans cette position, par exemple un mouvement composé de plusieurs rotations et translations par rapport au pare-chocs arrière 40 du véhicule. Lors de ce mouvement, un point d’extrémité du panneau secondaire 30, qui peut par exemple coïncider avec l’élément de translation 38, effectue un mouvement de translation par rapport au panneau primaire 20. Ainsi, le panneau secondaire 30 se retrouve placé de manière à obstruer une ouverture centrale entre la partie supérieure du pare-chocs 42 et le panneau primaire 20 du diffuseur. De cette manière, l’espace interne 70 du diffuseur est abrité de toute salissure qui aurait pu s’y introduire autrement. Ainsi, de la salissure comme de la boue, de la neige, de la poussière ou autre ne vient pas obstruer l’espace interne du diffuseur 70, ce qui empêcherait la rétractation de celui- ci.  During deployment, the actuator drives the movement of primary and secondary panels 30 (as previously described). Thus, the secondary panel 30 performs a simple rotational movement with respect to the upper portion 42 of the bumper 40. Simultaneously the primary panel 20 also moves to come into the deployed position. It can perform any kind of movement to come into this position, for example a movement consisting of several rotations and translations relative to the rear bumper 40 of the vehicle. During this movement, an end point of the secondary panel 30, which may for example coincide with the translation element 38, translates relative to the primary panel 20. Thus, the secondary panel 30 is placed in position. in order to obstruct a central opening between the upper part of the bumper 42 and the primary panel 20 of the diffuser. In this way, the internal space 70 of the diffuser is sheltered from any dirt that might have been introduced otherwise. Thus, dirt such as mud, snow, dust or other does not obstruct the internal space of the diffuser 70, which would prevent the retraction thereof.
Selon un autre mode de réalisation de l’invention, la panneau secondaire 30 effectue un mouvement combiné de plusieurs rotations simultanées autour de différents axes de rotation par rapport à la pièce de carrosserie 40 à laquelle il est lié. Ce mouvement peut être assuré à l’aide d’une ou plusieurs biellettes assurant la liaison entre le panneau secondaire 30 et la partie supérieure du pare-chocs 42. Cette trajectoire peut permettre par exemple de limiter au maximum l’espace entre les deux panneaux lors du déploiement et de la rétractation.  According to another embodiment of the invention, the secondary panel 30 performs a combined movement of several simultaneous rotations around different axes of rotation relative to the body part 40 to which it is connected. This movement can be ensured by means of one or more connecting rods connecting the secondary panel 30 and the upper part of the bumper 42. This trajectory may allow, for example, to limit as much as possible the space between the two panels. during deployment and retraction.
Cette cinématique particulière du panneau secondaire 30 présente de nombreux avantages. Par exemple, l’actionneur permettant le déploiement et la rétractation du diffuseur 10, est protégé des salissures. Ainsi, le risque de blocage du dispositif est grandement réduit. De même, l’usure des éléments mécaniques du diffuseur 10 est fortement réduite de par leur protection aux salissures. Enfin, utiliser un panneau secondaire 30 rigide, qui peut être peint (notamment dans la même teinte que le reste du véhicule), permet de donner une esthétique au diffuseur 10 qui soit en accord avec le reste du véhicule. De plus, un tel panneau 30 rigide possède une bien meilleure  This particular kinematics of the secondary panel 30 has many advantages. For example, the actuator for the deployment and retraction of the diffuser 10, is protected from soiling. Thus, the risk of blocking the device is greatly reduced. Similarly, the wear of the mechanical elements of the diffuser 10 is greatly reduced by their protection against soiling. Finally, using a rigid secondary panel 30, which can be painted (especially in the same shade as the rest of the vehicle), allows to give an aesthetic diffuser 10 which is consistent with the rest of the vehicle. In addition, such a rigid panel 30 has a much better
FEUILLE DE REMPLACEMENT (RÈGLE 26) résistance à la fatigue que si l’on utilisait, par exemple, un élément flexible. SUBSTITUTE SHEET (RULE 26) resistance to fatigue than using, for example, a flexible element.
L'invention n'est pas limitée aux modes de réalisation présentés et d'autres modes de réalisation apparaîtront clairement à l'homme du métier.  The invention is not limited to the embodiments presented and other embodiments will become apparent to those skilled in the art.
Le diffuseur peut par exemple comporter plusieurs panneaux secondaires, par exemple trois. Cela permet au diffuseur d’épouser la forme concave de la pièce de carrosserie, les pare-chocs des véhicules ayant souvent des formes galbées, tout en ayant trois panneaux présentant chacun une faible concavité. Ceci présente un avantage certain en termes de compacité du diffuseur une fois en position rétractée, car un seul panneau secondaire présenterait une concavité qui lui ferait occuper un espace plus grand une fois rétracté, ce qui rendrait le système très encombrant pour le loger derrière le pare-chocs.  The diffuser may for example have several secondary panels, for example three. This allows the diffuser to marry the concave shape of the body part, the bumpers of the vehicles often having curved shapes, while having three panels each having a low concavity. This has a definite advantage in terms of the compactness of the diffuser once in the retracted position, because a single secondary panel has a concavity that would make it occupy a larger space once retracted, which would make the system very bulky to house it behind the bumper -chocs.
De la même manière, le diffuseur peut comporter plusieurs panneaux primaires, par exemple trois. Ainsi, le diffuseur peut présenter une plus forte concavité, ce qui est particulièrement avantageux, notamment lorsque la pièce de carrosserie présente une forte concavité.  In the same way, the diffuser may comprise several primary panels, for example three. Thus, the diffuser may have a greater concavity, which is particularly advantageous, especially when the body part has a strong concavity.
En variation, le diffuseur arrière peut, au lieu d’être inséré dans une ouverture du pare- chocs arrière du véhicule, être inséré entre un pare-chocs arrière et un bas de caisse du véhicule.  In variation, the rear diffuser can, instead of being inserted into an opening of the rear bumper of the vehicle, be inserted between a rear bumper and a sill of the vehicle.
FEUILLE DE REMPLACEMENT (RÈGLE 26) Nomenclature SUBSTITUTE SHEET (RULE 26) Nomenclature
10 : diffuseur arrière 10: rear diffuser
20 : panneau primaire  20: primary panel
22 : face interne du panneau primaire  22: inner face of the primary panel
24 : face externe du panneau primaire  24: outer face of the primary panel
30 : panneau secondaire  30: secondary panel
32 : face interne du panneau secondaire  32: inner side of the secondary panel
34 : face externe du panneau secondaire  34: outer face of the secondary panel
36 : liaison pivot entre le panneau secondaire et la pièce de carrosserie 36: pivot connection between the secondary panel and the bodywork part
38 : élément de translation du panneau secondaire 38: translation element of the secondary panel
40 : pare-chocs arrière  40: rear bumper
42 : partie supérieure du pare-chocs  42: upper part of the bumper
44 : partie inférieure du pare-chocs  44: lower part of the bumper
50 : ouverture du pare-chocs  50: opening the bumper
70 : espace interne du diffuseur  70: internal space of the diffuser
FEUILLE DE REMPLACEMENT (RÈGLE 26) SUBSTITUTE SHEET (RULE 26)

Claims

Revendications claims
1 . Pièce de carrosserie de véhicule automobile qui comprend un diffuseur arrière (10) comprenant au moins un panneau primaire (20) et au moins un panneau secondaire (30), chacun de ces panneaux (20, 30) étant mobile entre une position déployée et une position rétractée, caractérisée en ce que lorsque la pièce de carrosserie est fixée sur un véhicule automobile, le panneau secondaire (30) est complètement non visible de l’extérieur en position rétractée et obstrue une ouverture (50) entre la pièce de carrosserie et le panneau primaire (20) en position déployée, le panneau secondaire (30) étant lié mécaniquement à une partie supérieure (42) de la pièce de carrosserie. 1. A motor vehicle body part which comprises a rear diffuser (10) comprising at least one primary panel (20) and at least one secondary panel (30), each of these panels (20, 30) being movable between an extended position and a retracted position, characterized in that when the bodywork part is fixed to a motor vehicle, the secondary panel (30) is completely invisible from the outside in the retracted position and obstructs an opening (50) between the bodywork part and the primary panel (20) in the deployed position, the secondary panel (30) being mechanically connected to an upper portion (42) of the bodywork part.
2. Pièce de carrosserie selon la revendication précédente dans laquelle un point d’extrémité du panneau secondaire (30) effectue un mouvement de translation linéaire par rapport au panneau primaire (20) ou tout autre mouvement dans lequel le point d’extrémité reste à une distance sensiblement constante du panneau primaire (20), lorsque le diffuseur passe de sa position rétractée à sa position déployée et inversement, de manière à limiter au maximum une distance entre les deux panneaux (20, 30).  2. Body part according to the preceding claim wherein an end point of the secondary panel (30) performs a linear translational movement relative to the primary panel (20) or any other movement in which the end point remains at a minimum substantially constant distance from the primary panel (20), when the diffuser moves from its retracted position to its deployed position and vice versa, so as to limit as far as possible a distance between the two panels (20, 30).
3. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle le panneau secondaire (30) effectue un mouvement de rotation simple par rapport à la pièce de carrosserie avec laquelle le panneau est lié.  3. Body part according to one of the preceding claims wherein the secondary panel (30) performs a simple rotational movement relative to the body part with which the panel is bonded.
4. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle le panneau secondaire (30) et la partie supérieure de la pièce de carrosserie (42) sont liés par une liaison pivot.  4. Body part according to one of the preceding claims wherein the secondary panel (30) and the upper part of the bodywork part (42) are connected by a pivot connection.
5. Pièce de carrosserie selon l’une des revendications 1 et 2 dans laquelle le panneau secondaire (30) effectue un mouvement combiné de plusieurs rotations simultanées autour de différents axes de rotation par rapport à la pièce de carrosserie à laquelle il est lié. 5. Bodywork part according to one of claims 1 and 2 wherein the secondary panel (30) performs a combined movement of several simultaneous rotations around different axes of rotation relative to the body part to which it is linked.
6. Pièce de carrosserie selon l’une des revendications 1 , 2 et 5 dans laquelle le panneau secondaire (30) et la partie supérieure de la pièce de carrosserie sont liés par au moins une bielle.  6. Body part according to one of claims 1, 2 and 5 wherein the secondary panel (30) and the upper part of the bodywork part are connected by at least one connecting rod.
7. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle le panneau primaire (20) est dépourvu d’une liaison mécanique directe avec le panneau secondaire (30).  7. Bodywork part according to one of the preceding claims wherein the primary panel (20) is free of a direct mechanical connection with the secondary panel (30).
8. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle les panneaux primaire (20) et secondaires (30) ne sont jamais en contact l’un avec l’autre. 8. Bodywork part according to one of the preceding claims wherein the primary panels (20) and secondary (30) are never in contact with each other.
FEUILLE DE REMPLACEMENT (RÈGLE 26) SUBSTITUTE SHEET (RULE 26)
9. Pièce de carrosserie selon l’une des revendications 1 à 6 dans laquelle le panneau secondaire (30) est lié au panneau primaire (20) via un élément de translation (38) apte à translater sur le panneau primaire (20). 9. Body part according to one of claims 1 to 6 wherein the secondary panel (30) is connected to the primary panel (20) via a translational member (38) adapted to translate on the primary panel (20).
10. Pièce de carrosserie selon l’une des revendications précédentes qui comprend un mécanisme motorisé apte à permettre le déploiement et la rétractation des panneaux primaire (20) et secondaire (30).  10. Body part according to one of the preceding claims which comprises a motorized mechanism adapted to allow the deployment and retraction of the primary panels (20) and secondary (30).
1 1. Pièce de carrosserie selon les revendications précédentes comportant plusieurs panneaux primaires (20), par exemple trois.  1. Body part according to the preceding claims comprising a plurality of primary panels (20), for example three.
12. Pièce de carrosserie selon les revendications précédentes comportant plusieurs panneaux secondaires (30), par exemple trois.  12. Body part according to the preceding claims comprising a plurality of secondary panels (30), for example three.
13. Pièce de carrosserie selon l’une des revendications précédentes, la pièce de carrosserie étant un pare-chocs arrière (40).  13. Bodywork part according to one of the preceding claims, the bodywork part being a rear bumper (40).
14. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle le panneau secondaire (30) est apte à éviter l’intrusion de corps étrangers entre la pièce de carrosserie et le panneau primaire (20).  14. Bodywork part according to one of the preceding claims wherein the secondary panel (30) is adapted to prevent the intrusion of foreign bodies between the bodywork part and the primary panel (20).
15. Pièce de carrosserie selon l’une des revendications précédentes dans laquelle, lorsqu’elle est montée sur un véhicule, le panneau primaire (20) et le panneau secondaire (30) comportent chacun une face interne (22, 32) tournée vers le véhicule, une face externe (24, 34) tournée vers l’extérieur du véhicule, la face externe (34) du panneau secondaire (30) étant en regard de la face interne (22) du panneau primaire (20) lorsque le diffuseur (10) est en position rétractée.  Bodywork part according to one of the preceding claims, in which, when mounted on a vehicle, the primary panel (20) and the secondary panel (30) each have an inner face (22, 32) facing the vehicle. vehicle, an outer face (24, 34) facing the outside of the vehicle, the outer face (34) of the secondary panel (30) being opposite the inner face (22) of the primary panel (20) when the diffuser ( 10) is in the retracted position.
FEUILLE DE REMPLACEMENT (RÈGLE 26) SUBSTITUTE SHEET (RULE 26)
EP18807625.1A 2017-11-22 2018-11-22 Movable rear diffuser for a motor vehicle, comprising a translating panel Withdrawn EP3713818A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1761051A FR3073809B1 (en) 2017-11-22 2017-11-22 MOBILE REAR DIFFUSER FOR A TRANSLATION PANEL VEHICLE
PCT/EP2018/082249 WO2019101875A1 (en) 2017-11-22 2018-11-22 Movable rear diffuser for a motor vehicle, comprising a translating panel

Publications (1)

Publication Number Publication Date
EP3713818A1 true EP3713818A1 (en) 2020-09-30

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ID=60923756

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EP18807625.1A Withdrawn EP3713818A1 (en) 2017-11-22 2018-11-22 Movable rear diffuser for a motor vehicle, comprising a translating panel

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EP (1) EP3713818A1 (en)
CN (1) CN111356627B (en)
FR (1) FR3073809B1 (en)
WO (1) WO2019101875A1 (en)

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FR2845334B1 (en) * 2002-10-02 2004-11-19 Plastic Omnium Cie VEHICLE BUMPER COMPRISING A SPOILER ARTICULATED BETWEEN THREE STABLE BALANCE POSITIONS
DE10319506A1 (en) * 2003-04-30 2004-11-25 Webasto Ag Vehicle roof with a wind deflector element with interfering body and manufacturing process therefor
DE112012005465T5 (en) * 2011-12-26 2014-09-11 Aisin Seiki Kabushiki Kaisha Vehicle rear spoiler device
US9409858B2 (en) * 2012-03-07 2016-08-09 H. Lee Moffitt Cancer Center And Research Institute, Inc. Selective histone deactylase 6 inhibitors
DE102013105842B4 (en) * 2013-06-06 2022-03-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Motor vehicle with a rear diffuser
DE102013020886A1 (en) * 2013-12-11 2015-06-11 Wabco Europe Bvba-Sprl Rear spoiler device for a vehicle
CN205239679U (en) * 2015-07-31 2016-05-18 全耐塑料公司 Automobile body part of motor vehicle
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DE102015116343A1 (en) * 2015-09-28 2017-03-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Adjustable front diffuser for a vehicle
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WO2019101875A1 (en) 2019-05-31
FR3073809B1 (en) 2019-11-22
CN111356627B (en) 2022-03-04
CN111356627A (en) 2020-06-30

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