FR3128423A1 - VEHICLE BODY GROOVE WITH UPPER HERRINGBONE EDGE - Google Patents
VEHICLE BODY GROOVE WITH UPPER HERRINGBONE EDGE Download PDFInfo
- Publication number
- FR3128423A1 FR3128423A1 FR2111220A FR2111220A FR3128423A1 FR 3128423 A1 FR3128423 A1 FR 3128423A1 FR 2111220 A FR2111220 A FR 2111220A FR 2111220 A FR2111220 A FR 2111220A FR 3128423 A1 FR3128423 A1 FR 3128423A1
- Authority
- FR
- France
- Prior art keywords
- upstream
- bodywork
- downstream
- motor vehicle
- groove
- 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.)
- Pending
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
RAINURE DE CARROSSERIE DE VÉHICULE AVEC BORD AMONT EN CHEVRONS L’invention a trait à une carrosserie de véhicule automobile (2), comprenant deux éléments de carrosserie adjacents (4, 6) formant, à leur adjacence, une rainure (8) transversale à une direction principale d’écoulement d’air lorsque le véhicule automobile se déplace, les deux éléments de carrosserie adjacents (4, 6) comprenant un élément de carrosserie amont (4) et un élément de carrosserie aval (6), ladite rainure (8) étant délimitée, en amont, par un bord aval (4.1) de l’élément de carrosserie amont (4) et, en aval, par un bord amont (6.1) de l’élément de carrosserie aval (6) ; dans laquelle le bord aval (4.1) de l’élément de carrosserie amont (4) présente, dans l’étendue de l’élément de carrosserie amont, un profil en chevrons avec des pointes dirigées vers le bord amont (6.1) de l’élément de carrosserie aval (6). (Figure à publier avec l'abrégé : Figure 1)The invention relates to a motor vehicle body (2), comprising two adjacent bodywork elements (4, 6) forming, at their adjacency, a groove (8) transverse to a main direction of air flow when the motor vehicle is moving, the two adjacent bodywork elements (4, 6) comprising an upstream bodywork element (4) and a downstream bodywork element (6), said groove (8) being delimited, upstream, by a downstream edge (4.1) of the upstream bodywork element (4) and, downstream, by an upstream edge (6.1) of the downstream bodywork element (6); in which the downstream edge (4.1) of the upstream bodywork element (4) has, in the extent of the upstream bodywork element, a herringbone profile with points directed towards the upstream edge (6.1) of the downstream bodywork element (6). (Figure to be published with abstract: Figure 1)
Description
L’invention a trait au domaine des carrosseries de véhicules automobiles, plus particulièrement au domaine de la gestion des bruits aérodynamiques des carrosseries de véhicules automobiles.The invention relates to the field of motor vehicle bodies, more particularly to the field of the management of aerodynamic noise from motor vehicle bodies.
Le document de brevet publié FR 2 910 863 A1 a trait à un dispositif de réduction de bruits aérodynamiques générés dans une cavité formée par une rainure entre deux éléments de carrosserie d’un véhicule automobile. Ce dispositif comprend une paroi perforée disposée dans la cavité et en liaison avec une cavité d’absorption acoustique. Ce dispositif est intéressant mais présente un inconvénient de complexité et de coût de mise en œuvre, en particulier dans le cadre d’une production en série.The published patent document FR 2 910 863 A1 relates to a device for reducing aerodynamic noise generated in a cavity formed by a groove between two bodywork elements of a motor vehicle. This device comprises a perforated wall arranged in the cavity and in connection with a sound absorption cavity. This device is interesting but has a disadvantage of complexity and cost of implementation, in particular in the context of mass production.
Le document de brevet publié FR 2 918 016 A1 a trait à un autre dispositif de réduction de bruits aérodynamiques générés dans une cavité formée par une rainure entre deux éléments de carrosserie d’un véhicule automobile. Cet autre dispositif comprend un ou plusieurs blocs en matériau élastiquement déformable, comme notamment de la mousse, formant une séparation dans la cavité. Ce ou ces blocs sont fixés à un des deux éléments de carrosserie. Similairement au dispositif de l’enseignement précédent, ce dispositif est intéressant mais présente un inconvénient de complexité et de coût de mise en œuvre, en particulier dans le cadre d’une production en série.The published patent document FR 2 918 016 A1 relates to another device for reducing aerodynamic noise generated in a cavity formed by a groove between two bodywork elements of a motor vehicle. This other device comprises one or more blocks of elastically deformable material, such as in particular foam, forming a separation in the cavity. This or these blocks are fixed to one of the two bodywork elements. Similar to the device of the previous teaching, this device is interesting but has a disadvantage of complexity and cost of implementation, in particular in the context of mass production.
Les dispositifs de réduction de bruits aérodynamiques des enseignements susmentionnés s’attachent à réduire par absorption les bruits aérodynamiques générés dans la cavité formée par la rainure entre les deux éléments de carrosserie adjacents. Ils ne permettent pas de réduire la génération ou production de ces bruits aérodynamiques.The aerodynamic noise reduction devices of the aforementioned teachings seek to reduce by absorption the aerodynamic noise generated in the cavity formed by the groove between the two adjacent bodywork elements. They do not make it possible to reduce the generation or production of these aerodynamic noises.
L’invention a pour objectif de pallier au moins un inconvénient de l’état de la technique susmentionné. Plus particulièrement, l’invention a pour objectif de réduire les bruits aérodynamiques générés dans la cavité formée par une rainure entre les deux éléments de carrosserie adjacentsThe aim of the invention is to overcome at least one drawback of the aforementioned state of the art. More particularly, the aim of the invention is to reduce the aerodynamic noise generated in the cavity formed by a groove between the two adjacent bodywork elements.
L’invention a pour objet une carrosserie de véhicule automobile, comprenant deux éléments de carrosserie adjacents formant, à leur adjacence, une rainure transversale à une direction principale d’écoulement d’air lorsque le véhicule automobile se déplace, les deux éléments de carrosserie adjacents comprenant un élément de carrosserie amont et un élément de carrosserie aval, ladite rainure étant délimitée, en amont, par un bord aval de l’élément de carrosserie amont et, en aval, par un bord amont de l’élément de carrosserie aval ; remarquable en ce que le bord aval de l’élément de carrosserie amont présente, dans l’étendue de l’élément de carrosserie amont, un profil en chevrons avec des pointes dirigées vers le bord amont de l’élément de carrosserie aval.The subject of the invention is a motor vehicle body, comprising two adjacent bodywork elements forming, adjacent to them, a groove transverse to a main direction of air flow when the motor vehicle is moving, the two adjacent bodywork elements comprising an upstream bodywork element and a downstream bodywork element, said groove being delimited, upstream, by a downstream edge of the upstream bodywork element and, downstream, by an upstream edge of the downstream bodywork element; remarkable in that the downstream edge of the upstream bodywork element has, in the extent of the upstream bodywork element, a herringbone profile with points directed towards the upstream edge of the downstream bodywork element.
Le bord aval de l’élément de carrosserie amont correspond au bord amont de la rainure. Similairement, le bord amont de l’élément de carrosserie aval correspond au bord aval de la rainure.The downstream edge of the upstream bodywork element corresponds to the upstream edge of the groove. Similarly, the upstream edge of the downstream bodywork element corresponds to the downstream edge of the groove.
Le bord aval de la rainure, c’est-à-dire le bord amont de l’élément de carrosserie aval est avantageusement généralement droit ou rectiligne. Il est entendu qu’il peut présenter une légère courbure, inhérente à la forme usuellement complexe de la carrosserie de véhicule automobile. La notion de profil droit ou rectiligne est ainsi à comprendre à l’échelle des chevrons du profil amont de la rainure, c’est-à-dire le bord aval de l’élément de carrosserie amont.The downstream edge of the groove, that is to say the upstream edge of the downstream bodywork element is advantageously generally straight or rectilinear. It is understood that it may have a slight curvature, inherent to the usually complex shape of the motor vehicle body. The notion of straight or rectilinear profile is thus to be understood at the scale of the rafters of the profile upstream of the groove, that is to say the downstream edge of the upstream bodywork element.
Selon un mode avantageux de l’invention, la rainure présente une largeur dans la direction principale d’écoulement d’air, le profil en chevron recouvrant au moins une partie de la largeur de la rainure.According to an advantageous embodiment of the invention, the groove has a width in the main direction of air flow, the chevron profile covering at least part of the width of the groove.
La largeur de la rainure, dans la direction principale d’écoulement d’air, est avantageusement délimitée, en amont, par une paroi amont de la rainure adjacente à l’élément de carrosserie amont, et en aval, par le bord aval de la rainure, c’est-à-dire le bord amont de l’élément de carrosserie aval.The width of the groove, in the main direction of air flow, is advantageously delimited, upstream, by an upstream wall of the groove adjacent to the upstream bodywork element, and downstream, by the downstream edge of the groove, that is to say the upstream edge of the downstream bodywork element.
Selon un mode avantageux de l’invention, le recouvrement de la largeur de la rainure par le profil en chevron est supérieur ou égal à 1/3.According to an advantageous embodiment of the invention, the overlap of the width of the groove by the chevron profile is greater than or equal to 1/3.
Selon un mode avantageux de l’invention, le recouvrement de la largeur de la rainure par le profil en chevron est supérieur ou égal à 1/2.According to an advantageous embodiment of the invention, the overlap of the width of the groove by the chevron profile is greater than or equal to 1/2.
Selon un mode avantageux de l’invention, le recouvrement de la largeur de la rainure par le profil en chevron est supérieur ou égal à 3/4.According to an advantageous embodiment of the invention, the overlap of the width of the groove by the chevron profile is greater than or equal to 3/4.
Selon un mode avantageux de l’invention, le profil en chevrons est formé intégralement avec l’élément de carrosserie amont.According to an advantageous embodiment of the invention, the herringbone profile is formed integrally with the upstream bodywork element.
Selon un mode avantageux de l’invention, le profil en chevrons est formé sur un élément rapporté sur l’élément de carrosserie amont.According to an advantageous mode of the invention, the herringbone profile is formed on an element attached to the upstream bodywork element.
Selon un mode avantageux de l’invention, au moins un de l’élément de carrosserie amont et de l’élément de carrosserie aval est un ouvrant.According to an advantageous embodiment of the invention, at least one of the upstream bodywork element and of the downstream bodywork element is an opening.
Selon un mode avantageux de l’invention, l’élément de carrosserie amont est un toit et l’élément de carrosserie aval est un volet arrière.According to an advantageous embodiment of the invention, the upstream bodywork element is a roof and the downstream bodywork element is a rear flap.
L’invention a également pour objet un procédé de réduction de bruits aérodynamiques produits dans une rainure de carrosserie de véhicule automobile, ladite rainure étant transversale à une direction principale d’écoulement d’air lorsque le véhicule automobile se déplace, et délimitée, en amont, par un bord aval d’un élément de carrosserie amont et, en aval, par un bord amont d’un élément de carrosserie aval ; remarquable en ce que ledit procédé comprend de prévoir au bord aval de l’élément de carrosserie amont un profil en chevrons avec des pointes dirigées vers le bord amont de l’élément de carrosserie aval, la carrosserie de véhicule automobile étant selon l’invention.The invention also relates to a method for reducing aerodynamic noise produced in a groove in the bodywork of a motor vehicle, said groove being transverse to a main direction of air flow when the motor vehicle is moving, and delimited upstream , by a downstream edge of an upstream bodywork element and, downstream, by an upstream edge of a downstream bodywork element; remarkable in that said method comprises providing at the downstream edge of the upstream bodywork element a herringbone profile with points directed towards the upstream edge of the downstream bodywork element, the motor vehicle body being according to the invention.
Les mesures de l’invention sont avantageuses en ce qu’elles réduisent de manière notoire la production de bruits aérodynamiques dans les rainures de carrosserie de véhicules automobiles, et ce en particulier dans des plages de fréquence où l’oreille humaine est la plus sensible, en particulier entre 500 et 1000 Hz. De plus, les mesures de l’invention peuvent être facilement mises en œuvre, notamment en formant le profil en chevrons directement dans l’élément de carrosserie ou encore en rapportant sur l’élément de carrosserie un élément avec le profil en chevrons préalablement formé, notamment par moulage en matière plastique.The measures of the invention are advantageous in that they significantly reduce the production of aerodynamic noise in the body grooves of motor vehicles, and this in particular in frequency ranges where the human ear is most sensitive, in particular between 500 and 1000 Hz. In addition, the measures of the invention can be easily implemented, in particular by forming the herringbone profile directly in the bodywork element or even by attaching to the bodywork element an element with the herringbone profile previously formed, in particular by plastic molding.
Par rapport à l’état de la technique susmentionné, l’invention est avantageuse en ce qu’elle diminue la production des bruits aérodynamiques, signifiant qu’elle peut être combinée aux solutions de l’état de la technique consistant à absorber les bruits aérodynamiques produits.Compared to the aforementioned state of the art, the invention is advantageous in that it decreases the production of aerodynamic noise, meaning that it can be combined with the solutions of the state of the art consisting in absorbing aerodynamic noise products.
Claims (10)
caractérisé en ce que le bord aval (4.1) de l’élément de carrosserie amont (4) présente, dans l’étendue de l’élément de carrosserie amont, un profil en chevrons avec des pointes dirigées vers le bord amont (6.1) de l’élément de carrosserie aval (6).Motor vehicle body (2), comprising two adjacent body elements (4, 6) forming, adjacent to them, a groove (8) transverse to a main direction of air flow when the motor vehicle is moving, the two adjacent bodywork elements (4, 6) comprising an upstream bodywork element (4) and a downstream bodywork element (6), said groove (8) being delimited, upstream, by a downstream edge (4.1) of the upstream bodywork (4) and, downstream, by an upstream edge (6.1) of the downstream bodywork element (6);
characterized in that the downstream edge (4.1) of the upstream bodywork element (4) has, in the extent of the upstream bodywork element, a herringbone profile with points directed towards the upstream edge (6.1) of the downstream bodywork element (6).
caractérisé en ce que ledit procédé comprend de prévoir au bord aval (4.1) de l’élément de carrosserie amont (4) un profil en chevrons avec des pointes dirigées vers le bord amont (6.1) de l’élément de carrosserie aval, la carrosserie de véhicule automobile (2) étant selon l’une des revendications 1 à 9.Method for reducing aerodynamic noise produced in a groove (8) of the motor vehicle body (2), said groove being transverse to a main direction of air flow when the motor vehicle is moving, and delimited, upstream, by a downstream edge (4.1) of an upstream bodywork element (4) and, downstream, by an upstream edge (6.1) of a downstream bodywork element (6);
characterized in that said method comprises providing at the downstream edge (4.1) of the upstream bodywork element (4) a herringbone profile with points directed towards the upstream edge (6.1) of the downstream bodywork element, the bodywork motor vehicle (2) being according to one of claims 1 to 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2111220A FR3128423A1 (en) | 2021-10-21 | 2021-10-21 | VEHICLE BODY GROOVE WITH UPPER HERRINGBONE EDGE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2111220A FR3128423A1 (en) | 2021-10-21 | 2021-10-21 | VEHICLE BODY GROOVE WITH UPPER HERRINGBONE EDGE |
FR2111220 | 2021-10-21 |
Publications (1)
Publication Number | Publication Date |
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FR3128423A1 true FR3128423A1 (en) | 2023-04-28 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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FR2111220A Pending FR3128423A1 (en) | 2021-10-21 | 2021-10-21 | VEHICLE BODY GROOVE WITH UPPER HERRINGBONE EDGE |
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FR (1) | FR3128423A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070089531A1 (en) * | 2005-09-15 | 2007-04-26 | Wood Richard M | Wake stabilization device and method for reducing the aerodynamic drag of ground vehicles |
FR2893566A1 (en) * | 2005-11-18 | 2007-05-25 | Peugeot Citroen Automobiles Sa | Motor vehicle`s rearview mirror, has case including wall extended by mounting foot and terminated by edge, where edge has undulations for weakening turbulences of airflow surrounding rearview mirror |
FR2910863A1 (en) | 2006-12-27 | 2008-07-04 | Peugeot Citroen Automobiles Sa | Acoustic energy controlling device for door leaf of motor vehicle, has acoustic resonance cavity including wall, whose part is provided with perforation to form perforated walls, which are connected with acoustic absorption cavities |
FR2918016A1 (en) | 2007-06-29 | 2009-01-02 | Peugeot Citroen Automobiles Sa | Aerodynamic noise reducing device for motor vehicle, has set of separation blocks housed in continuous cavity to divide sections of cavity, where each block blocks transversal section of cavity and integrated with body element |
US20170274941A1 (en) * | 2016-03-22 | 2017-09-28 | Transtex Composite Inc. | Road vehicle aerodynamic apparatus with serrated trailling edge |
-
2021
- 2021-10-21 FR FR2111220A patent/FR3128423A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070089531A1 (en) * | 2005-09-15 | 2007-04-26 | Wood Richard M | Wake stabilization device and method for reducing the aerodynamic drag of ground vehicles |
FR2893566A1 (en) * | 2005-11-18 | 2007-05-25 | Peugeot Citroen Automobiles Sa | Motor vehicle`s rearview mirror, has case including wall extended by mounting foot and terminated by edge, where edge has undulations for weakening turbulences of airflow surrounding rearview mirror |
FR2910863A1 (en) | 2006-12-27 | 2008-07-04 | Peugeot Citroen Automobiles Sa | Acoustic energy controlling device for door leaf of motor vehicle, has acoustic resonance cavity including wall, whose part is provided with perforation to form perforated walls, which are connected with acoustic absorption cavities |
FR2918016A1 (en) | 2007-06-29 | 2009-01-02 | Peugeot Citroen Automobiles Sa | Aerodynamic noise reducing device for motor vehicle, has set of separation blocks housed in continuous cavity to divide sections of cavity, where each block blocks transversal section of cavity and integrated with body element |
US20170274941A1 (en) * | 2016-03-22 | 2017-09-28 | Transtex Composite Inc. | Road vehicle aerodynamic apparatus with serrated trailling edge |
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Effective date: 20230428 |
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Owner name: ECOLE NATIONALE SUPERIEURE DE MECANIQUE ET D'A, FR Effective date: 20240423 Owner name: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, FR Effective date: 20240423 Owner name: STELLANTIS AUTO SAS, FR Effective date: 20240423 |