EP3802291A1 - Diffuseur arriere mobile de vehicule a panneau escamotable - Google Patents
Diffuseur arriere mobile de vehicule a panneau escamotableInfo
- Publication number
- EP3802291A1 EP3802291A1 EP19728035.7A EP19728035A EP3802291A1 EP 3802291 A1 EP3802291 A1 EP 3802291A1 EP 19728035 A EP19728035 A EP 19728035A EP 3802291 A1 EP3802291 A1 EP 3802291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- panel
- diffuser
- vehicle
- primary
- primary panel
- 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- Withdrawn
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, 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. 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 perform its function and affect the aerodynamic performance of the vehicle, and requires maintenance and / or replacement that can be expensive. Then these openings can be perceived as unsightly for the motorist, as it affects the overall aesthetics 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 rear diffuser of a motor vehicle which comprises a primary panel and a secondary panel connected to the primary panel by at least two guide rods adapted to move the secondary panel in a movement along a longitudinal axis (X) of the vehicle compared to the primary panel, when the diffuser is mounted on a motor vehicle, each of these panels being movable between an extended position and a retracted position when the diffuser is fixed on a vehicle body part; the secondary panel being completely invisible from the outside in the retracted position and obstructing the opening between the bodywork part and the primary panel in the deployed position, when the bodywork part is fixed to a motor vehicle, the displacement of the secondary panel having place following a movement along a longitudinal axis (X) of the vehicle.
- the secondary panel obstructs, at least partially an opening created during deployment between the primary panel and the rest of the rear bumper of the vehicle. When it is deployed, three openings are created, a central between the primary panel and the bodywork part, and two sideways located on the sides of the primary panel.
- the secondary panel obstructs the central opening. Depending on its shape, it can even obstruct the two side openings.
- 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.
- the rear bumper 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 housed inside the vehicle in the retracted position, also allows to have a primary panel on the entire surface of the opening of the bumper. 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.
- connection between the primary and secondary panels via two connecting rods imposes a particular kinematic secondary panel which is particularly advantageous to allow it to avoid certain structural parts of the vehicle present in the direct environment of the diffuser.
- One of these pieces can for example be a shock absorber, which is usually made of a steel beam or aluminum, present in the vehicle rear bumper. This part, which can not be moved during the design of the vehicle, may interfere with the retraction of the secondary panel.
- the kinematics of the secondary panel according to the invention makes it possible to avoid this part.
- one of the guide rods linking the primary and secondary panels is linked to a system for deploying the primary panel
- the system for deploying the primary panel comprises at least one deployment link
- the primary panel deployment rod is mechanically linked to one of the guide rods, the deployment and retraction of the primary panel leading to those of the secondary panel;
- the two guide rods have the same length
- the two guide rods have different lengths
- the secondary panel has an amplitude of displacement between its extended and retracted positions of between 5 mm and 100 mm, preferably between 10 mm and 40 mm, in a frame of reference related to the primary panel;
- the invention also relates to a bodywork part of a motor vehicle comprising a rear diffuser according to the invention.
- the bodywork 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 secondary panel is invisible from outside the vehicle when the diffuser is in the retracted position.
- - Figure 1 is a sectional view of a rear lower end of a motor vehicle along a longitudinal plane comprising a rear diffuser according to the invention in the deployed position
- - Figure 2 is a sectional view of a rear lower end of a motor vehicle along a longitudinal plane comprising a rear diffuser according to the invention in the retracted position
- FIG. 3 is a perspective view of a vehicle bumper comprising a rear diffuser.
- 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.
- FIG. 1 and 2 show a rear diffuser 10 mounted on a vehicle body part 40, in section along a plane oriented vertically along the longitudinal axis X of the vehicle.
- This diffuser 10 is for example made of plastic.
- the body part 40 is here a rear bumper, for example also made of plastic.
- This diffuser 10 comprises a primary panel 20 and a secondary panel 30, each of these panels being movable between an extended position (illustrated in FIG. 1) and a retracted position (illustrated in FIG. 2), when the rear diffuser 10 is fixed on a vehicle body part (in this case the rear bumper 40).
- the secondary panel 30 is connected to the primary panel 20 by two guide rods 35.
- These two guide rods 35 are connected to the primary panel 20 each by a pivot connection, which is here placed at one end of the guide rod 35 and on a protuberance 22 of the primary panel 20, which extends substantially perpendicularly from an inner face 24 of the primary panel 20, toward the bodywork part 40.
- the rear diffuser 10 is therefore able to move from an extended position shown in FIG. 1 to a retracted position represented in FIG. 2.
- the bodywork part 40 of the vehicle comprises an upper part 42 and a lower part 44.
- An opening 50 is arranged between these two parts of the bumper.
- the primary panel 20 In retracted position, the primary panel 20 is pressed against the bumper of the vehicle and 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 face external, here shown facing downwards, relative to the vertical axis z of the vehicle.
- the primary panel 20 here comprises a tab 27 at its rear end 29.
- the tab 27 is optional, the primary panel 20 can therefore quite be devoid of it.
- the contact between the tongue 27 and the secondary panel 30 is optional, so it is quite possible to have a rear diffuser 10 in which the secondary panel 30 and the tab 27 do not touch.
- the bodywork part 40 here comprises a shock absorber 46, which forms a beam that may be made of steel, aluminum or composite for example, which is a structural part of the vehicle.
- a shock absorber 46 which forms a beam that may be made of steel, aluminum or composite for example, which is a structural part of the vehicle.
- the deployment and retraction of the primary panel 20 are actuated by means of a link system 26.
- This system 26 comprises several deployment links 25, which link the primary panel 20 to the body part 40.
- These rods 25 are either simple or double, that is to say that two connecting rods are arranged in series between the bodywork part 40 and the primary panel 20.
- This link system 26 can be actuated by an electric motor, a pneumatic device, or any other device that lends itself to this application.
- a transmission rod 37 connects one of the deployment rods 25 with one of the guide rods 35.
- This transmission rod 37 is fixed at one of its ends to one of the guide rods 25 at a connection point 38 by a pivot connection. On its other end, it is fixed at a point of connection 39 by a pivot connection on a guide rod 35.
- the choice of the height of the connection point 38 on the deployment rod 25 is made at the time of the diffuser design to achieve the desired deflection for the secondary panel between the deployed and retracted positions. The higher this point 38 is located on the deployment rod 25, the greater the clearance of the secondary panel 30 will be large, and vice versa.
- the guide rod 35 on which is fixed the transmission rod 37 has a square shape, and is connected with the protrusion 22 of the primary panel at its right angle. This guide rod 35 is connected at one of its ends to the secondary panel 30, and at the other of its ends to the guide rod 37. The geometry of this rod 35 is also chosen so as to obtain the desired travel for the secondary panel 30 between its deployed and retracted
- the two guide rods 25 here have the same length between their connection points with the primary panel and the secondary panel, but it is possible, alternatively, to have a connecting rod having a different length between these two points that the other, which leads to a different kinematics.
- the primary panel 20 completely obstructs an opening in the bodywork part 40, so that an internal space of the diffuser 70, located between the primary panel 20 and the body part 40, is protected from soiling of all kinds, such as mud, snow or dust, or any other type of foreign body to the vehicle.
- the rods 25, 35 and 37, as well as the deployment system 26 are also protected.
- the secondary panel is completely invisible from the outside of the vehicle on which it is mounted, which is particularly advantageous for the quality perceived by the user.
- 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 bodywork part 50 alone.
- the secondary panel 30 is this time oriented almost perpendicularly. at said primary panel 20.
- the assembly of the secondary panel 30 and the primary panel 20 obstructs, at least partially an opening of the bodywork part 50.
- the deployment of the primary panel 20 creates three openings, one central between the primary panel and the bodywork part 50, as well as two lateral sides (along the Y axis) of the primary panel 20.
- the secondary panel 30 obstructs the central opening 50, when the diffuser 10 is in the deployed position.
- the internal space of the diffuser 70 is actually larger than when the diffuser 10 is in the retracted position.
- This internal space 70 is protected from dirt 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.
- the primary panel 20 may have a general shape "U" allowing it to obstruct the lateral openings between it and the bumper 50, when the diffuser 10 is in the deployed position.
- the diffuser 10 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 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. As a result, the diffuser 10 reduces the drag force when deployed.
- a device (electric, mechanical, pneumatic or other), which is not shown in the figures, causes the movement of the deployment rods 25 of the deployment system of the primary panel 26.
- the primary panel 20 is moved from its retracted position to its deployed position. It thus performs, through the arrangement of the linkage system 22, a trajectory following a combined movement of several simultaneous rotations around different axes of rotation.
- This trajectory of the primary panel allows it to best position itself between its retracted position, where it fills alone the opening 50 of the bodywork part 40 so as to maintain continuity between the lower part 42 and upper part 44 of the part 40, and its deployed position in which it is placed to reduce the "suction effect" on the vehicle.
- the transmission rod 37 which is connected to one of the deployment rods 25 transmits the deployment or retraction movement to one of the guide rods 35, which has the effect of setting it rotation relative to the primary panel 20.
- This guide rod 35 therefore drives the secondary panel 30 in its retracting or deploying movement.
- these movements may for example be effected along a circular path relative to the primary panel 20.
- the guide rods 35 rotate around the point of connection with the primary panel 20, and drive the secondary panel 30 in their movement.
- one of the guide rods 35 is connected to the deployment system 26, which enables the deployment and retraction of the two panels 20, 30 with a single mechanism, which reduces the number of parts necessary and simplifies these steps.
- the fact that a guide rod 35 is mechanically connected to a deployment rod 25 further ensures good synchronization during the deployment and retraction of the two panels 20, 30.
- the secondary panel 30 is placed so as to obstruct a central opening 50 between the upper part of the bodywork part 44 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.
- This particular kinematics of the secondary panel 30 has many advantages. First, the shrink and unfold system of the diffuser 10, namely the deployment system 26 of the primary panel 20, and the connecting rods 25, 35 and 37 are protected from soiling. Thus, the risk of blocking the device is greatly reduced. Similarly, the wear of these mechanical elements is greatly reduced by their protection against soiling.
- the secondary panel 30 follows a particular path relative to the primary panel 20 allows it to avoid vehicle parts present in the environment of the diffuser 10, such as a shock absorber 46 for example.
- the two guide rods 35 making the same length the secondary panel 30 moves while remaining parallel to the tongue 27 of the primary panel, which facilitates the integration of the secondary panel 30 in its environment.
- This movement of retraction and deployment of the secondary panel has an amplitude of between 5 mm and 100 mm, preferably between 10 mm and 40 mm, in a frame of reference related to the primary panel 20.
- This retraction distance is adequate for the avoidance of elements in the environment of the diffuser 10.
- this amplitude is 30 mm.
- connection between the two panels 20 and 30 had been for example a slide, it would have been exposed to the risk of blockage by insertion of dirt preventing the sliding movement.
- This remark can be made for any diffuser 10 in which the secondary panel 30 would translate with respect to the primary panel 20.
- such a rigid panel has a much better fatigue strength than if, for example, a flexible element were used.
- the two guide rods 35 have the same length. This arrangement makes it possible to simply implement a circular movement of the secondary panel 30 in a frame linked to the primary panel 20.
- the circular path of the secondary panel 30 relative to the primary panel 20 allows effective avoidance of the elements present in the environment of the rear diffuser 10, such as the shock absorber 46 for example.
- the secondary panel 30 retracts from its deployed position to its retracted position.
- the two guide rods 35 may have different lengths. This arrangement makes it possible to add a rotation of the secondary panel 30 to its trajectory, which is useful for adapting this trajectory to the elements present in the environment of the diffuser 10 (for example the shock absorber 46).
- FIG. 3 represents a rear diffuser 10 according to the invention mounted on a piece of vehicle body 40, in the deployed position and on which the secondary panel 30 does not appear. We can see the opening 50 which is filled by the secondary panel 30 normally and through which dirt could enter the internal space 70 of the diffuser 10, if the secondary panel 30 was not there.
Landscapes
- 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)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1854613A FR3081820B1 (fr) | 2018-05-30 | 2018-05-30 | Diffuseur arriere mobile de vehicule a panneau escamotable |
| PCT/EP2019/064118 WO2019229200A1 (fr) | 2018-05-30 | 2019-05-29 | Diffuseur arriere mobile de vehicule a panneau escamotable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3802291A1 true EP3802291A1 (fr) | 2021-04-14 |
Family
ID=63036157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19728035.7A Withdrawn EP3802291A1 (fr) | 2018-05-30 | 2019-05-29 | Diffuseur arriere mobile de vehicule a panneau escamotable |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3802291A1 (fr) |
| CN (1) | CN112088119A (fr) |
| FR (1) | FR3081820B1 (fr) |
| WO (1) | WO2019229200A1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020132244B4 (de) * | 2020-12-04 | 2022-07-14 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zum Betreiben eines Kraftfahrzeugs mit einem Heckdiffusor |
| US11891126B2 (en) | 2021-08-24 | 2024-02-06 | Honda Motor Co., Ltd. | Active rear diffuser for vehicle |
| CN113998015B (zh) * | 2021-10-15 | 2023-12-22 | 上汽大通房车科技有限公司 | 一种汽车隐藏式后保侧边空气动力学扰流板及其调节方法 |
| DE102023003023A1 (de) * | 2023-07-24 | 2025-01-30 | Mercedes-Benz Group AG | Diffusorbaugruppe und Fahrzeug |
| DE102024117258B3 (de) * | 2024-06-19 | 2025-07-10 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verstellmechanismus für einen Diffusorkörper an einem Kraftfahrzeug, Diffusoreinrichtung und Kraftfahrzeug |
| FR3165429A1 (fr) * | 2024-08-12 | 2026-02-13 | Stellantis Auto Sas | Pare-chocs arrière à partie(s) mobile(s), pour un véhicule automobile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2963309B1 (fr) * | 2010-07-27 | 2012-08-10 | Peugeot Citroen Automobiles Sa | Ecran aerodynamique fixe sous la partie arriere du soubassement d'un vehicule automobile et vehicule ainsi equipe. |
| DE102013105842B4 (de) * | 2013-06-06 | 2022-03-10 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Kraftfahrzeug mit einem Heckdiffusor |
| GB2528926B (en) * | 2014-08-05 | 2018-06-06 | Jaguar Land Rover Ltd | Vehicle aerodynamic apparatus |
| DE102015113047A1 (de) * | 2015-08-07 | 2017-02-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Diffusoranordnung |
| KR20170022282A (ko) * | 2015-08-20 | 2017-03-02 | 현대자동차주식회사 | 차량의 공력 제어 장치 |
| DE102015118076A1 (de) * | 2015-10-23 | 2017-04-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Heckdiffusoranordnung für ein Kraftfahrzeug |
-
2018
- 2018-05-30 FR FR1854613A patent/FR3081820B1/fr not_active Expired - Fee Related
-
2019
- 2019-05-29 WO PCT/EP2019/064118 patent/WO2019229200A1/fr not_active Ceased
- 2019-05-29 EP EP19728035.7A patent/EP3802291A1/fr not_active Withdrawn
- 2019-05-29 CN CN201980031139.3A patent/CN112088119A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN112088119A (zh) | 2020-12-15 |
| FR3081820B1 (fr) | 2020-09-04 |
| WO2019229200A1 (fr) | 2019-12-05 |
| FR3081820A1 (fr) | 2019-12-06 |
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