• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an air deflector (4) intended to be mounted under a motor vehicle, in front of a wheel of the vehicle, in order to reduce the aerodynamic drag at said wheel, said deflector. air (4) comprising: an inclined front face (12) of concave profile; two lateral faces (14; 14 ') on either side of the front face (12), respectively; at least one of the two lateral faces (14; 14 ') having a concave profile. The invention also relates to a vehicle comprising at least one such air deflector (4).
    公开号:FR3028831A1
    申请号:FR1461489
    申请日:2014-11-26
    公开日:2016-05-27
    发明作者:Gregory Pujals；Tony Ruiz；Van Jean Philippe Thai
    申请人:Peugeot Citroen Automobiles SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to the aerodynamics of a motor vehicle. More particularly, the invention relates to the reduction of the aerodynamic drag of a motor vehicle.
    [0002] The underside of a motor vehicle is generally a zone of resistance to the penetration into the air of the vehicle. At high speed, the resistance comes mainly from the aerodynamic forces exerted on the vehicle through the regions of air overpressure and regions of air depression, for example by detachment or local reversal of the flow. These aerodynamic forces oppose the advancement of the vehicle. In particular, the wheels of a motor vehicle exert on their front face an air overpressure which generates a strong drag force. Moreover, the flow of air generally rushes into the wheel arches and air detachments can be observed downstream of these wheel arches. The strong aerodynamic forces working negatively in the energy balance of the vehicle, they generate an increase in fuel consumption, so it is sought to minimize it. Patent EP 2 607 215 A2 discloses air deflectors mounted under the vehicle upstream of the wheels. The baffles comprise an inclined front face to separate the air flow from the front face of the wheels. The separation of the air flow makes it possible to generate a stream of air at reduced pressure. The wheels are located in the wake at reduced pressure so as to decrease the drag force. The deflector is however applicable only for a certain type of vehicle, the front panel reducing the height under the floor of the vehicle. In particular, a reduced height under floor in front of the wheels is penalizing from the point of view of the ground clearance (especially at the beginning of a sidewalk). Invention Patent FR 2 858 793 B1 discloses movable air deflector elements mounted under the vehicle upstream or downstream of the wheels. The elements comprise a housing in which a deflector pivots between a retracted position in the vehicle and a projecting position. This teaching is interesting in that the change in flow is dynamic depending on the conditions of use of the vehicle, in particular its speed. The 3028831 2 retractable deflector property facilitates for example the approach of a sidewalk. The embodiments of the active faces of the baffle are however reduced for the realization of the housing, in particular to reduce fouling of the housing. In addition, the solution of this teaching can pose problems of reliability and presents a greater cost. The object of the invention is to propose a solution that overcomes at least one drawback of the state of the art, in particular of the state of the art mentioned above. The object of the invention is more particularly to propose a solution for modifying the air flow at the level of the wheels and wheel passages which is efficient and economical. The subject of the invention is an air baffle intended to be mounted under a motor vehicle, in front of a wheel of the vehicle, with a view to reducing the aerodynamic drag at the level of said wheel, said air baffle comprising : an inclined front face concave profile; two side faces on either side of the front face, respectively; remarkable in that at least one of the two side faces has a concave profile. The concavity is expressed relative to the flow of air on the outside of the volume formed by the air deflector. According to an advantageous embodiment of the invention, the air deflector has a cross section which increases gradually height and width from the front 20 to the rear of said air deflector. According to an advantageous embodiment of the invention, the profile of the front face and / or at least one of the lateral faces corresponds to an exponential function. According to an advantageous embodiment of the invention, the profile of the front face and / or of at least one of the lateral faces corresponds to the equation y = A.exp (Bx) where y expresses the height of the face and x expresses the position in a longitudinal direction of the air deflector, A and B being parameters. According to an advantageous embodiment of the invention, the parameter A is between 1 and 2, and / or the parameter B is between 0.01 and 0.05. According to an advantageous embodiment of the invention, the maximum height of the front face is between 20 mm and 90 mm, preferably between 30 mm and 70 mm.
    [0003] According to an advantageous embodiment of the invention, the front face and the lateral faces of the air deflector are made of rigid material and elastically deformable, preferably an elastomer. Advantageously, the rigid and elastically deformable material has a Shore A hardness greater than 45. The invention also relates to a motor vehicle comprising: front and rear wheel wells; air deflectors located at the front of the front wheel wells and / or the rear wheel wells; remarkable in that the air deflectors are in accordance with the invention.
    [0004] According to an advantageous embodiment of the invention, at least one, preferably each, of the air baffles is shifted laterally towards the inside of the vehicle relative to the wheel of the corresponding wheel well and is oriented outwards, its longitudinal axis forming an angle between 10 ° and 20 ° with the longitudinal axis of the vehicle. Specifically, the baffle (s) extends longitudinally from front to rear of the vehicle outwardly at the aforementioned angle. According to an advantageous embodiment of the invention, the or each of the air deflectors laterally offset towards the inside of the vehicle relative to the wheel is offset by a distance of between 80 and 300 mm, preferably between 100 mm and 250 mm, relative to to the longitudinal axis of the wheel.
    [0005] According to an advantageous embodiment of the invention, the front face and the lateral faces of the air deflectors are arranged so as to deflect the air downwards and the sides, respectively, of the wheel of the corresponding wheel well. According to an advantageous embodiment of the invention, the air deflector is at a distance from the front face of the lower wheel to 300mm, preferably less than 200mm.
    [0006] According to an advantageous embodiment of the invention, the vehicle further comprises one or more air deflectors behind the wheel wells, said air deflectors being in accordance with the invention. For the wheels before the longitudinal axis of the wheel is understood when the wheels are parallel to the longitudinal axis of the vehicle, that is to say when the vehicle is moving in a straight line.
    [0007] The measurements of the invention are interesting in that the air deflectors make it possible to effectively modify the air flow at the level of the wheels and wheel wells. In fact, the concave surfaces of the front face and of the lateral face or faces of the air deflectors allow an effective modification of the air flow. Moreover, the position of the air deflectors inside the vehicle with respect to the wheel axis increases the volume of air impacted, in particular that going towards the wheel arches. Other features and advantages of the present invention will be better understood from the description and the drawings, of which: FIG. 1 is a perspective view of a motor vehicle comprising air deflectors in accordance with FIG. invention; FIG. 2 is a view from below of the motor vehicle of FIG. 1; - Figure 3 is a perspective view of three quarters before an air deflector according to the invention; Figure 4 is a side view of the air deflector of Figure 3; - Figure 5 is a top view of the air deflector of Figure 3; Figure 1 is a perspective view of a motor vehicle 2 comprising air deflectors 4 according to the invention. The underside 6 of the motor vehicle 2 comprises wheel wells 8 located at the front as well as at the rear of the vehicle.
    [0008] The air deflectors 4 are located in front of and / or behind the wheels to reduce the aerodynamic drag of the wheels. They also make it possible to modify the air flow at the wheel arches. Figure 2 is a bottom view 6 of the motor vehicle 2 according to the invention. One can precisely see a wheel 10 housed in a wheel arch 8 25 located at the front left of the vehicle 2. The air deflector 4 according to the invention is located, in this case, in front of the wheel arch 8. The air deflector 4 comprises a front face 12 and side faces 14 and 14 'which are arranged to deflect air downwards and to the sides of the wheel 10. It can be seen that the deflector Air 4 is at a distance from the front face 16 of the wheel which is less than 300mm, preferably less than 200mm. This measurement is interesting in that the flow of air deflected by the deflector 4 is able to deviate from the wheel 10 and reduce the air pressure at the front face 16. It can also be seen that the deflector d Air 4 is disposed inward of the vehicle with respect to the longitudinal axis "R" of the wheel. For the wheels before the longitudinal axis "R" of the wheel 10 is understood when the wheel is parallel to the longitudinal axis of the vehicle, that is to say when the vehicle is moving in a straight line. The arrangement of the air deflector 4 is described more precisely below, it can already be understood that it is related to the zone of relative low pressure formed by the wheel passage 8. Indeed, the movement of the air flow 4 The air under the vehicle 2 is impacted by this low pressure zone in that it is diverted towards this zone. Three flow lines "a", "b", "c" are shown in the image to illustrate the phenomenon, they are in front of the vehicle in a longitudinal direction, they are then laterally deflected towards the wheel well 8. It may be noted that the air deflector 15 4 is offset by a distance "D" between 80 and 300 mm, preferably between 100 mm and 250 mm, with respect to the longitudinal axis "R" of the wheel 10. observe that the air deflector 4 is oriented outwards, its longitudinal axis forming an angle between 10 ° and 20 ° with the longitudinal axis of the vehicle. This measurement is advantageous so that the air deflector 4 can impact a major part of the deflected air flow towards the wheel arch 8. FIG. 3 is a perspective view of three quarters front of a deflector of air 4 according to the invention. The longitudinal axis and the transverse axis of the air deflector are represented on the image by the axes K and L, respectively. The concave front face 12 of the air deflector and the two side faces 14 and 14 'of the deflector 4 formed on either side of the front face 12 and which are also concave can be seen. The lateral face 14 'behind the image is only slightly visible. The concavity of the faces of the air deflector 4 is expressed with respect to the air flow, represented schematically by an arrow, on the outside (below the image) of the volume formed by the deflector 4. The face The interior of the baffle (at the top of the image) is intended to be against the underside of the vehicle. The leading edge 18, to the left of the image, is the one intended to be oriented towards the front of the vehicle in the embodiment where the deflector is in front of a wheel. It can already be noted that the concave profile of the front 12 and lateral faces 14 and 14 'is favorable for delaying the interference with the relief of the road, for example vis-à-vis a sidewalk. The front face 12 and the side faces 14 and 14 'are inclined downwardly so as to deflect the flow of air downwards. The side faces 14 and 14 'are further inclined to the side so as to deflect the airflow laterally to the "L" axis on the sides of the baffle. This measurement is interesting in that it increases the impacted portion of the volume of air passing under the vehicle and heading towards the wheel well. Each of the lateral faces 14 and 14 'advantageously forms an area of between 30% and 60% of the front face 12 of the air deflector. The front face 12 and the lateral faces 14 and 14 'of the air deflector 4 10 are favorably made of rigid and deformable material, preferably of elastomer. This measurement is interesting in that it promotes impact resistance, for example the impact of projectiles from the road. Figure 4 is a side view of the air deflector 4 according to the invention. The air deflector 4 has an S-S cross-section which gradually increases in height from the front (left on the image) to the rear of said air deflector 4 (right in the image). The height here expressed is along the vertical axis "M" on the image and intended to be the vertical axis once the air deflector is mounted on the vehicle. We can observe the front face 12 and a 14 of the two side faces. The profile of the front face 12 and the lateral faces of the deflector 4 corresponds to an exponential function according to the equation y = A. exp (B x) where y expresses the height of the face in the direction "M" and x expresses the position in the longitudinal direction "K" of the deflector. A and B are parameters, A being between 1 and 2, B being between 0.01 and 0.05. The parameters are different depending on whether the front face 12 or the side faces are defined. We can see on the right of the image the maximum height H of the front face 12 which is between 20mm and 90mm, preferably between 30mm and 70mm. A height H of 30mm is favorable for vehicles with low ground clearance. The length L in the longitudinal direction "K" of the deflector 4 is between 50 and 250mm.
    [0009] Figure 5 is a top view of an air deflector 4 according to the invention. It can be seen that the section S-S seen in connection with the preceding figure progressively increases in width in the direction "L" from the front (left on the image) to the rear of said deflector. On the right side of the image, the maximum width "I" of the deflector 4 can be between 100 mm and 300 mm depending on the width of the wheel protected by the air deflector 4.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. An air deflector (4) for mounting under a motor vehicle (2), in front of a wheel (10) of the vehicle, to reduce aerodynamic drag at said wheel (10), said air deflector (4) comprising: - an inclined front face (12) of concave profile; - two side faces (14; 14 ') on either side of the front face (12), respectively; characterized in that at least one of the two side faces (14; 14 ') has a concave profile.
    [0002]
    2. Air deflector (4) according to claim 1, characterized in that it has a cross section (SS) which gradually increases in height and width from the front to the rear of said air deflector (4).
    [0003]
    3. Air deflector (4) according to one of claims 1 and 2, characterized in that the profile of the front face (12) and / or at least one of the side faces (14; 14 ') corresponds to an exponential function.
    [0004]
    4. Air deflector (4) according to one of claims 1 to 3, characterized in that the profile of the front face (12) and / or at least one of the side faces (14; 14 ') corresponds to the equation y = A. exp (B x) where y expresses the height of the face and x expresses the position in a longitudinal direction (K) of the air deflector (4), A and B being parameters.
    [0005]
    5. air deflector (4) according to claim 4, characterized in that the parameter A is between 1 and 2, and / or the parameter B is between 0.01 and 0.05.
    [0006]
    6. Air deflector (4) according to one of claims 1 to 5, characterized in that the maximum height (H) of the front face (12) is between 20mm and 90mm, preferably between 30mm and 70mm.
    [0007]
    7. Motor vehicle (2) comprising: - wheel arches (8) front and rear; air deflectors (4) located at the front of the front wheel wells (8) and / or the rear wheel wells (8); Characterized in that the air deflectors (4) are according to one of claims 1 to 6.
    [0008]
    8. Motor vehicle (2) according to claim 7, characterized in that at least one, preferably each, air deflectors (4) is shifted laterally 5 towards the inside of the vehicle (2) relative to the wheel (10) of the wheel well (8) corresponding and outwardly, its longitudinal axis (K) forming an angle between 10 ° and 20 ° with the longituchal axis of the vehicle.
    [0009]
    9. Motor vehicle (2) according to claim 8, characterized in that the or each of the air deflectors (4) offset laterally inwardly of the vehicle relative to the wheel (10) is offset by a distance between 80mm and 300mm, preferably between 100mm and 250mm, relative to the longitudinal axis (R) of the wheel (10).
    [0010]
    10. Motor vehicle (2) according to one of claims 7 to 9, characterized in that the front face (12) and the side faces (14; 14 ') of the air deflectors (4) 15 are arranged diverting air downwards and sides, respectively, from the wheel (10) of the corresponding wheel well (8).
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA1156293A|1981-02-12|1983-11-01|Martin, Aubrey M.|Trailer undercarriage fairings|
    JPS63111378U|1987-01-13|1988-07-18|
    JPH03120280U|1990-03-20|1991-12-10|
    FR2858793A1|2003-08-13|2005-02-18|Peugeot Citroen Automobiles Sa|Aerodynamic unit for motor vehicle, has active face that is displaceable between retracted position in vehicle base and deployed position, where active face is projected at upstream and downstream of front and rear wheels|
    JP2006069396A|2004-09-02|2006-03-16|Toyota Motor Corp|Straightening device for vehicle|
    WO2011126069A1|2010-04-08|2011-10-13|日産自動車株式会社|Front underfloor structure of vehicle|
    DE102010037616A1|2010-09-17|2012-03-22|Dr. Ing. H.C. F. Porsche Aktiengesellschaft|Air guiding device for motor vehicle, comprises air guide element, which is arranged in front side of front wheel of vehicle, where air guide elements are moved vertical to roadway|
    EP2607215A2|2011-12-19|2013-06-26|Bayerische Motoren Werke Aktiengesellschaft|Arrangement of an air deflector on a vehicle component|
    GB2513541A|2013-02-08|2014-11-05|Swift Group Ltd|Device for improving aerodynamics of vehicles|CN108116517A|2016-11-30|2018-06-05|通用汽车环球科技运作有限责任公司|For the angled air curtain extension of controlled flow of air|
    CN109204582A|2017-06-29|2019-01-15|通用汽车环球科技运作有限责任公司|Frame sides air baffle|
    EP3647167A1|2018-10-31|2020-05-06|Mazda Motor Corporation|Automotive vehicle|JP5067104B2|2007-10-03|2012-11-07|トヨタ自動車株式会社|Vehicle lower structure|JP2020104577A|2018-12-26|2020-07-09|マツダ株式会社|Deflector structure for automobile|
    CN110155091B|2019-05-23|2020-08-04|中国科学院力学研究所|Drag reduction device for high-speed train|
    CN111186453B|2020-01-19|2021-06-08|中车青岛四方机车车辆股份有限公司|Equipment guiding device under rail train car and rail train|
    法律状态:
    2015-10-23| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-27| PLSC| Search report ready|Effective date: 20160527 |
    2016-10-24| PLFP| Fee payment|Year of fee payment: 3 |
    2017-10-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-29| CA| Change of address|Effective date: 20180312 |
    2018-06-29| CD| Change of name or company name|Owner name: PEUGEOT CITROEN AUTOMOBILES SA, FR Effective date: 20180312 |
    2018-10-24| PLFP| Fee payment|Year of fee payment: 5 |
    2020-11-20| ST| Notification of lapse|Effective date: 20200911 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1461489A|FR3028831B1|2014-11-26|2014-11-26|VEHICLE WITH AIR DEFLECTOR FOR WHEEL|FR1461489A| FR3028831B1|2014-11-26|2014-11-26|VEHICLE WITH AIR DEFLECTOR FOR WHEEL|
    PCT/FR2015/052726| WO2016083682A1|2014-11-26|2015-10-09|Vehicle with air deflector for wheel|
    CN201580061159.7A| CN107107971B|2014-11-26|2015-10-09|Vehicle with air deflector for wheel|
    EP15788162.4A| EP3224124B1|2014-11-26|2015-10-09|Vehicle with air deflector for wheel|
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