FR2862269A1 - Aerodynamic device for e.g. minivan, has vibrating plates inserted in cut arranged in rear bay, roof, panel and window post of body, and creating vibrations that are directed to units of body to reduce drag and lift of vehicle - Google Patents

Aerodynamic device for e.g. minivan, has vibrating plates inserted in cut arranged in rear bay, roof, panel and window post of body, and creating vibrations that are directed to units of body to reduce drag and lift of vehicle Download PDF

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Publication number
FR2862269A1
FR2862269A1 FR0313433A FR0313433A FR2862269A1 FR 2862269 A1 FR2862269 A1 FR 2862269A1 FR 0313433 A FR0313433 A FR 0313433A FR 0313433 A FR0313433 A FR 0313433A FR 2862269 A1 FR2862269 A1 FR 2862269A1
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France
Prior art keywords
aerodynamic device
vibrating plate
vehicle
vibrations
roof
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Granted
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FR0313433A
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French (fr)
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FR2862269B1 (en
Inventor
Jean Francois Beaudoin
Jean Jacques Lasserre
Jean Luc Aider
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Priority to FR0313433A priority Critical patent/FR2862269B1/en
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Publication of FR2862269B1 publication Critical patent/FR2862269B1/en
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    • 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
    • B62D35/007—Rear spoilers
    • 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

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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 device has a body (2) with a rear bay (3), a roof (4), a rear quarter panel (6) and a front window post for forming window zones. Vibrating plates (10) are inserted in a cut arranged respectively in bay, roof, panel and post of the body, and create vibrations that are directed perpendicularly or parallely to the bay, roof, panel and post of the body for reducing drag and lift of a vehicle. An independent claim is also included for a motor vehicle having an aerodynamic device.

Description

La présente invention concerne un dispositif aérodynamique pour unThe present invention relates to an aerodynamic device for a

véhicule automobile et également un véhicule automobile équipé d'un tel dispositif aérodynamique.  motor vehicle and also a motor vehicle equipped with such an aerodynamic device.

Les véhicules automobiles, lorsqu'ils roulent, sont soumis à un certain nombre d'efforts qui s'oppose à leur avancement. Ces efforts sont en particulier les frottements solides, c'est à dire les contacts des roues avec le sol, et les frottements aérodynamiques, comme par exemple les frottements de l'air sur les parois de la carrosserie du véhicule.  Motor vehicles, when they drive, are subject to a number of efforts that prevent their advancement. These efforts are in particular the solid friction, that is to say the contact of the wheels with the ground, and aerodynamic friction, such as the friction of the air on the walls of the vehicle body.

En plus de ces frottements, les véhicules automobiles sont soumis à une troisième source d'efforts qui s'oppose également à leur avancement. Ces efforts sont les forces aérodynamiques exercées sur le véhicule à travers des régions de surpression et de dépression. En effet, à haute vitesse, ces efforts deviennent dominant par rapport aux autres et jouent un rôle essentiel sur la consommation et la stabilité du véhicule.  In addition to this friction, motor vehicles are subject to a third source of effort that also opposes their advancement. These efforts are the aerodynamic forces exerted on the vehicle through regions of overpressure and depression. Indeed, at high speed, these efforts become dominant over the others and play a key role in the consumption and stability of the vehicle.

Ces forces aérodynamiques sont essentiellement générées par les dépressions créées par les décollements, les recirculations et les tourbillons longitudinaux de l'air. Les recirculations et donc les régions de basse pression sont importantes sur l'arrière du véhicule et particulièrement au niveau de la lunette arrière et du coffre. En effet, les écoulements de l'air à l'arrière des véhicules automobiles sont complexes et, en général, il se produit un équilibre entre les décollements et les tourbillons longitudinaux.  These aerodynamic forces are essentially generated by the depressions created by the detachments, the recirculations and the longitudinal vortices of the air. Recirculation and therefore low pressure regions are important on the rear of the vehicle and particularly at the rear window and the trunk. Indeed, the air flows at the rear of motor vehicles are complex and, in general, there is a balance between detachments and longitudinal vortices.

Les dispositifs utilisés en aérodynamique automobile interviennent sur le décollement qui a lieu sur l'arrière du véhicule, en particulier dans la région du raccord entre le pavillon et la lunette arrière, d'une part, et la lunette arrière et le coffre, d'autre part.  The devices used in automotive aerodynamics intervene on the detachment which takes place on the rear of the vehicle, in particular in the region of the connection between the roof and the rear window, on the one hand, and the rear window and the trunk, of somewhere else.

Les dispositifs classiques sont essentiellement constitués par des becquets, des ailerons ou des déflecteurs placés dans ces zones à l'arrière du véhicule.  Conventional devices consist essentially of spoilers, fins or deflectors placed in these areas at the rear of the vehicle.

Le becquet est utilisé le plus souvent pour réduire le coefficient de 30 pénétration dans l'air et les autres systèmes sont plutôt utilisés pour réduire la portance.  The spoiler is most often used to reduce the coefficient of penetration into the air and the other systems are rather used to reduce the lift.

L'invention a pour but de proposer un dispositif aérodynamique qui permet de contrôler les tourbillons longitudinaux et les décollements et d'une manière générale la structure globale de l'écoulement de l'air sur les éléments de la carrosserie d'un véhicule automobile.  The object of the invention is to propose an aerodynamic device which makes it possible to control the longitudinal vortices and detachments and generally the overall structure of the flow of air over the elements of the bodywork of a motor vehicle.

L'invention a donc pour objet un dispositif aérodynamique pour un véhicule automobile comprenant une carrosserie constituée par les éléments de carrosserie formant des zones tourbillonnaires, caractérisé en ce qu'il comprend, dans au moins une desdites zones tourbillonnaires, au moins une plaque vibrante pour réduire la traînée et la portance de ce véhicule.  The subject of the invention is therefore an aerodynamic device for a motor vehicle comprising a body constituted by the body elements forming swirling zones, characterized in that it comprises, in at least one of said swirl zones, at least one vibrating plate for reduce the drag and lift of this vehicle.

Selon d'autres caractéristiques de l'invention: - ladite plaque vibrante est insérée dans une découpe ménagée dans l'élément de carrosserie correspondant de ladite zone tourbillonnaire, - ladite zone tourbillonnaire est déterminée par une arête formée par au moins un des éléments de carrosserie constitué par les montants de baie avant et/ou arrière, un pavillon et les ailes arrière, - ladite plaque vibrante est disposée en amont ou en aval de l'arête, - les vibrations de ladite plaque vibrante sont dirigées perpendiculairement ou parallèlement à l'élément de carrosserie sur lequel ladite 20 plaque vibrante est montée, - les vibrations de ladite plaque vibrante sont constantes et/ou variables par modification de l'amplitude etlou de la fréquence, - les variations de l'amplitude et/ou de la fréquence des vibrations de ladite plaque vibrante sont pilotées en fonction d'informations fournies par au 25 moins un capteur de vitesse etlou de pression et/ou de frottement, - l'amplitude des vibrations est comprise entre 0 et 10 mm, - la fréquence des vibrations est comprise entre 0 et 500 Hz, - ladite plaque a une largeur comprise entre 1 et 200 mm. L'invention a aussi pour objet un véhicule automobile, caractérisé en ce qu'il comporte au moins un dispositif aérodynamique tel que précédemment mentionné.  According to other features of the invention: - said vibrating plate is inserted into a cutout formed in the corresponding bodywork element of said swirl zone, - said swirl zone is determined by an edge formed by at least one of the bodywork elements constituted by the front and / or rear bay posts, a roof and the rear wings, - said vibrating plate is disposed upstream or downstream of the edge, - the vibrations of said vibrating plate are directed perpendicularly or parallel to the body element on which said vibrating plate is mounted, the vibrations of said vibrating plate are constant and / or variable by modification of the amplitude and / or the frequency, the variations of the amplitude and / or the frequency of the vibrations. vibration of said vibrating plate is driven according to information provided by at least one speed and / or pressure sensor and / or scrubber the amplitude of the vibrations is between 0 and 10 mm, the frequency of the vibrations is between 0 and 500 Hz, the said plate has a width of between 1 and 200 mm. The invention also relates to a motor vehicle, characterized in that it comprises at least one aerodynamic device as previously mentioned.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels: - la Fig. 1 est une vue schématique en perspective de l'arrière 5 d'un véhicule automobile équipé d'au moins un dispositif aérodynamique conforme à l'invention, - la Fig. 2 est une vue schématique de côté du véhicule automobile équipé d'au moins un dispositif aérodynamique conforme à l'invention, - la Fig. 3 est une vue schématique en perspective d'un exemple d'implantation d'un dispositif aérodynamique dans un élément de carrosserie d'un véhicule automobile, - la Fig. 4 est une vue schématique en coupe transversale du dispositif aérodynamique conforme à l'invention.  The invention will be better understood on reading the description which follows, given by way of example and with reference to the appended drawings, in which: FIG. 1 is a schematic perspective view of the rear of a motor vehicle equipped with at least one aerodynamic device according to the invention; FIG. 2 is a schematic side view of the motor vehicle equipped with at least one aerodynamic device according to the invention; FIG. 3 is a diagrammatic perspective view of an exemplary embodiment of an aerodynamic device in a bodywork element of a motor vehicle, FIG. 4 is a schematic cross-sectional view of the aerodynamic device according to the invention.

Les véhicules automobiles, lorsqu'ils roulent, sont soumis à des efforts qui s'opposent à leur avancement et qui sont les frottements solides, les frottements aérodynamiques et, à haute vitesse, les forces aérodynamiques générées par les dépressions et par les décollements, les recirculations et les tourbillons longitudinaux de l'air.  Motor vehicles, when they drive, are subjected to forces which prevent their advancement and which are solid friction, aerodynamic friction and, at high speed, the aerodynamic forces generated by the depressions and by the detachments, the recirculations and longitudinal eddies of air.

Ainsi, une carrosserie 2 d'un véhicule automobile, comme représentée sur les Figs. 1 et 2, comporte des régions de basse pression où ces phénomènes sont particulièrement importants.  Thus, a body 2 of a motor vehicle, as shown in Figs. 1 and 2, includes regions of low pressure where these phenomena are particularly important.

D'une manière générale, les zones tourbillonnaires sont déterminées par des arêtes formées par des éléments de carrosserie qui sont constitués par exemple par les montants de baie arrière 3, le pavillon 4 et les ailes arrière 6 (Fig. 1) et les montants de baie avant 7 (Fig. 2). Le dispositif aérodynamique selon l'invention permet de contrôler les tourbillons longitudinaux et les décollements et par la même la structure globale de l'écoulement de l'air notamment à l'arrière du véhicule automobile 1 en modifiant les conditions limites de l'écoulement de l'air dans ces zones. Il permet également de contrôler l'équilibre entre les tourbillons longitudinaux et le décollement en perturbant ces tourbillons longitudinaux ou en favorisant ou non ces décollements. 15 20  In general, the vortex zones are determined by ridges formed by body members which consist for example of the rear bays 3, the roof 4 and the rear fenders 6 (FIG. front bay 7 (Fig. 2). The aerodynamic device according to the invention makes it possible to control the longitudinal vortices and detachments and consequently the overall structure of the flow of air, particularly at the rear of the motor vehicle 1 by modifying the boundary conditions of the flow of air in these areas. It also makes it possible to control the balance between the longitudinal vortices and the detachment by disturbing these longitudinal vortices or by promoting or not these detachments. 15 20

Pour cela, l'une ou plusieurs ou l'ensemble de ces zones tourbillonnaires formées par les arêtes au niveau des montants de baie avant 7 etlou arrière 3, du pavillon 4 et des ailes arrière 6 sont équipées d'un dispositif aérodynamique conforme à l'invention et qui comprend, en amont ou au niveau de ladite arrête, au moins une plaque vibrante désignée par la référence 10.  For this, one or more or all of these vortex zones formed by the ridges at the level of the front bays 7 and rear rear 3, the roof 4 and the rear fenders 6 are equipped with an aerodynamic device according to the invention and which comprises, upstream or at said edge, at least one vibrating plate designated by the reference 10.

Ainsi que montré à la Fig. 3, la plaque vibrante 10 est insérée dans une découpe 11 ménagée dans l'élément de carrosserie correspondant, comme par exemple le pavillon 4, et cette plaque vibrante 10 est, en position repos, affleurante audit élément de carrosserie. Comme montré à la Fig. 4 la plaque 10 sort d'une hauteur h2 inférieure à son épaisseur h1.  As shown in FIG. 3, the vibrating plate 10 is inserted into a cutout 11 formed in the corresponding bodywork element, such as for example the horn 4, and this vibrating plate 10 is, in the rest position, flush with said bodywork element. As shown in FIG. 4 the plate 10 leaves a height h2 less than its thickness h1.

Les vibrations de la plaque 10 sont provoquées par un dispositif approprié de type connu, comme par exemple un système électromagnétique ou un système mécanique, et ces vibrations sont dirigées perpendiculairement ou parallèlement à l'élément de carrosserie sur lequel ladite plaque vibrante 10 est montée.  The vibrations of the plate 10 are caused by a suitable device of known type, such as for example an electromagnetic system or a mechanical system, and these vibrations are directed perpendicularly or parallel to the bodywork element on which said vibrating plate 10 is mounted.

Un dispositif envisageable pour provoquer les vibrations de la plaque 10 peut-être un système de type "haut-parleur". Le mouvement de la plaque 10 peut dans ce cas être obtenu de la même façon qu'une membrane de hautparleur, au moyen d'une bobine dont l'aimant est solidaire de la plaque vibrante.  A device that can be used to cause the vibrations of the plate 10 may be a "speaker" type system. The movement of the plate 10 can in this case be obtained in the same way as a speaker membrane, by means of a coil whose magnet is integral with the vibrating plate.

Selon un premier mode de réalisation, les vibrations de la plaque 10 sont constantes et, dans ce cas, l'amplitude de ces vibrations est comprise entre 0 et 10 mm et la fréquence desdites vibrations est comprise entre 0 et 500 Hz.  According to a first embodiment, the vibrations of the plate 10 are constant and, in this case, the amplitude of these vibrations is between 0 and 10 mm and the frequency of said vibrations is between 0 and 500 Hz.

Selon un second mode de réalisation, les vibrations de la plaque vibrante 10 sont variables en modifiant l'amplitude et/ou la fréquence de ces vibrations. Pour cela, les variations de l'amplitude et/ou de la fréquence des vibrations de cette plaque vibrante 10 sont pilotées en fonction d'informations fournies par au moins un capteur de vitesse et/ou de pression et/ou de frottement implanté sur au moins un des éléments de la carrosserie 2 du véhicule automobile 1. Dans ce cas, l'amplitude des vibrations varie entre 0 et 10 mm et la fréquence de ces vibrations varie entre 0 et 500 Hz.  According to a second embodiment, the vibrations of the vibrating plate 10 are variable by modifying the amplitude and / or the frequency of these vibrations. For this purpose, the variations of the amplitude and / or the frequency of the vibrations of this vibrating plate 10 are controlled according to information provided by at least one speed and / or pressure and / or friction sensor implanted on at minus one of the elements of the bodywork 2 of the motor vehicle 1. In this case, the amplitude of the vibrations varies between 0 and 10 mm and the frequency of these vibrations varies between 0 and 500 Hz.

La dimension de chaque plaque vibrante 10 est fonction de la géométrie de l'élément de carrosserie sur lequel la plaque vibrante correspondante est insérée. Ainsi, la plaque vibrante 10 peut être constituée d'une seule plaque ou bien de plusieurs plaques vibrantes de plus petites dimensions fonctionnant indépendamment ou collectivement.  The size of each vibrating plate 10 is a function of the geometry of the body element on which the corresponding vibrating plate is inserted. Thus, the vibrating plate 10 may consist of a single plate or of several vibrating plates of smaller dimensions operating independently or collectively.

D'une manière générale, la largeur de la plaque vibrante 10 est comprise entre 1 et 200 mm.  In general, the width of the vibrating plate 10 is between 1 and 200 mm.

Ainsi, les vibrations créées par la ou les plaques vibrantes 10 dans une ou plusieurs zones tourbillonnaires perturbent les structures tourbillonnaires générées autour du véhicule dans les zones équipées de la ou des plaques vibrantes 10 ce qui permet de contrôler les tourbillons longitudinaux et les décollements et, de ce fait, la structure globale de l'écoulement de l'air sur le véhicule automobile.  Thus, the vibrations created by the vibrating plate (s) 10 in one or more vortex zones disturb the vortex structures generated around the vehicle in the zones equipped with the vibrating plate (s) 10, which makes it possible to control the longitudinal vortices and the detachments and, as a result, the overall structure of the flow of air on the motor vehicle.

Le dispositif aérodynamique selon l'invention s'applique à un 15 véhicule automobile qu'il soit monospace, bicorps ou tricorps et permet donc de réduire la traînée et la portance de ce véhicule et par conséquent de diminuer la consommation d'énergie et d'augmenter la stabilité dudit véhicule.  The aerodynamic device according to the invention is applicable to a motor vehicle whether it is a minivan, a hatchback or a three-box vehicle and thus makes it possible to reduce the drag and the lift of this vehicle and consequently to reduce the energy consumption and increase the stability of said vehicle.

Claims (12)

REVENDICATIONS 1. Dispositif aérodynamique pour un véhicule automobile comprenant une carrosserie (2) constituée par des éléments de carrosserie (3, 4, 6, 7) formant des zones tourbillonnaires, caractérisé en ce qu'il comprend, 5 dans au moins une desdites zones tourbillonnaires, au moins une plaque vibrante (10) pour réduire la traînée et la portance de ce véhicule.  An aerodynamic device for a motor vehicle comprising a body (2) constituted by body elements (3, 4, 6, 7) forming swirl zones, characterized in that it comprises, in at least one of said swirl zones at least one vibrating plate (10) for reducing the drag and the lift of this vehicle. 2. Dispositif aérodynamique selon la revendication 1, caractérisé en ce que ladite plaque vibrante (10) est insérée dans une découpe (11) ménagée dans l'élément de carrosserie (3, 4, 6, 7) correspondant de ladite zone tourbillonnaire.  2. Aerodynamic device according to claim 1, characterized in that said vibrating plate (10) is inserted into a cutout (11) formed in the corresponding bodywork element (3, 4, 6, 7) of said swirl zone. 3. Dispositif aérodynamique selon la revendication 1 ou 2, caractérisé en ce que ladite zone tourbillonnaire est déterminée par une arête formée par au moins un des éléments de carrosserie (3, 4, 6, 7) constitué par les montants de baie avant (7) et/ou arrière (3), un pavillon (4) et les ailes arrière (6).  Aerodynamic device according to claim 1 or 2, characterized in that said swirl zone is determined by an edge formed by at least one of the body elements (3, 4, 6, 7) constituted by the front bays (7). ) and / or rear (3), a flag (4) and the rear wings (6). 4. Dispositif aérodynamique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ladite plaque vibrante (10) est disposée en amont ou en aval de l'arête.  4. aerodynamic device according to any one of claims 1 to 3, characterized in that said vibrating plate (10) is disposed upstream or downstream of the edge. 5. Dispositif aérodynamique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les vibrations de ladite plaque vibrante (10) sont dirigées perpendiculairement à l'élément de carrosserie (3, 4, 6, 7) sur lequel ladite plaque vibrante (10) est montée.  Aerodynamic device according to one of claims 1 to 4, characterized in that the vibrations of said vibrating plate (10) are directed perpendicular to the body element (3, 4, 6, 7) on which said plate vibrator (10) is mounted. 6. Dispositif aérodynamique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les vibrations de ladite plaque vibrante (10) sont dirigées parallèlement à l'élément de carrosserie (3, 4, 6. 7) sur lequel ladite plaque vibrante (10) est montée.  Aerodynamic device according to one of Claims 1 to 4, characterized in that the vibrations of said vibrating plate (10) are directed parallel to the body element (3, 4, 6, 7) on which said plate vibrator (10) is mounted. 7. Dispositif aérodynamique selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les vibrations de ladite plaque vibrante (10) sont constantes et/ou variables par modification de l'amplitude et/ou de la fréquence.  Aerodynamic device according to any one of claims 1 to 6, characterized in that the vibrations of said vibrating plate (10) are constant and / or variable by varying the amplitude and / or the frequency. 8. Dispositif aérodynamique selon la revendication 7, caractérisé en ce que les variations de l'amplitude et/ou de la fréquence des vibrations de ladite plaque vibrante (10) sont pilotées en fonction d'informations fournies par au moins un capteur de vitesse et/ou de pression et/ou de frottement implanté sur au moins un des éléments de la carrosserie du véhicule.  Aerodynamic device according to claim 7, characterized in that the variations of the amplitude and / or the frequency of the vibrations of said vibrating plate (10) are controlled according to information provided by at least one speed sensor and / or pressure and / or friction implanted on at least one of the elements of the vehicle body. 9. Dispositif aérodynamique selon la revendication 7 ou 8, caractérisé en ce que l'amplitude des vibrations est comprise entre 0 et 10 mm.  Aerodynamic device according to claim 7 or 8, characterized in that the vibration amplitude is between 0 and 10 mm. 10. Dispositif aérodynamique selon la revendication 7 ou 8, caractérisé en ce que la fréquence des vibrations est comprise entre 0 et 500 hertz.  Aerodynamic device according to claim 7 or 8, characterized in that the vibration frequency is between 0 and 500 hertz. 11. Dispositif aérodynamique selon l'une quelconque des revendications 1 à 10, caractérisé en ce que la plaque vibrante (10) a une largeur 10 comprise entre 1 et 200 mm.  11. Aerodynamic device according to any one of claims 1 to 10, characterized in that the vibrating plate (10) has a width of between 1 and 200 mm. 12. véhicule automobile, caractérisé en ce qu'il comporte au moins un dispositif aérodynamique de réduction de la traînée et de la portance selon l'une quelconque des revendications précédentes.  12. motor vehicle, characterized in that it comprises at least one aerodynamic device for reducing drag and lift according to any one of the preceding claims.
FR0313433A 2003-11-17 2003-11-17 AERODYNAMIC DEVICE FOR A MOTOR VEHICLE AND A MOTOR VEHICLE EQUIPPED WITH SUCH AERODYNAMIC DEVICE Expired - Fee Related FR2862269B1 (en)

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FR2902743A1 (en) * 2006-06-22 2007-12-28 Plastic Omnium Cie Aerodynamic system for e.g. car, has electro-mechanical unit arranged near swirl zones for transforming electricity into vibrating waves to re-join air flow in swirl zones and including piezoelectric membrane overmolded in body part
WO2017072530A1 (en) * 2015-10-29 2017-05-04 Imperial Innovations Limited Drag reduction method
WO2020023868A1 (en) * 2018-07-26 2020-01-30 Magna Exteriors Inc. Active deployable bi-level spoiler architecture enabling full vehicle drag reduction

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896759A1 (en) * 2006-02-01 2007-08-03 Peugeot Citroen Automobiles Sa Streamlined device for motor vehicle, has signaling light with movable part that moves in translation between retracted position and projected active position relative to panel by controlling unit, where light is disposed on panel
FR2902743A1 (en) * 2006-06-22 2007-12-28 Plastic Omnium Cie Aerodynamic system for e.g. car, has electro-mechanical unit arranged near swirl zones for transforming electricity into vibrating waves to re-join air flow in swirl zones and including piezoelectric membrane overmolded in body part
EP1873044A1 (en) * 2006-06-22 2008-01-02 Compagnie Plastic Omnium Aerodynamic device for a vehicle
WO2017072530A1 (en) * 2015-10-29 2017-05-04 Imperial Innovations Limited Drag reduction method
GB2544044A (en) * 2015-10-29 2017-05-10 Imp Innovations Ltd Drag reduction method
WO2020023868A1 (en) * 2018-07-26 2020-01-30 Magna Exteriors Inc. Active deployable bi-level spoiler architecture enabling full vehicle drag reduction

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