• 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:
    An air guide (1) for the front face (2) of a motor vehicle comprises a channel (3) for sealing the air entering from the front of the vehicle (4) to a cooling system (5), when the air guide (1) is mounted on the vehicle, characterized in that the channel (3) has areas of mechanical weakness (6), defining programmed areas of permanent deformation able to shorten along the longitudinal axis of the vehicle the air guide (1) during deformation of said areas of mechanical weakness (6).
    公开号:FR3024406A1
    申请号:FR1457540
    申请日:2014-08-01
    公开日:2016-02-05
    发明作者:Thierry Roussel；Arnold Fayt
    申请人:Plastic Omnium SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the automotive field, and more particularly to the field of the front faces for a motor vehicle, in particular of the type comprising air inlets for cooling the vehicle engine. The front face for a motor vehicle is a set of components located in front of the air coolers, comprising at least the bumper. A front face may also comprise: shock elements (absorbers), a beam, fairing elements, air duct elements, front fenders, optics ... Generally, a front face of vehicles comprises cooling air intakes which are provided at the front of motor vehicles to cool the engine. The cooling air inlet is often ornamented with a grid. In general, the cooling is effected via an air / coolant exchanger, also called radiator, and / or a charge air cooler, also abbreviated as RAS. These two devices must be powered by a flow of air from outside the vehicle to ensure their cooling function. The radiator is usually supplied with a central cooling air inlet, while the RAS is generally supplied with a side cooling air inlet on the front of the bumper. These air intakes allow air outside the vehicle to enter an air duct leading air to the cooling systems. During a collision at the front of the vehicle, the force exerted on the front face is transmitted to the cooling system by the air duct, because of its rigidity, leading to severe damage to the system. To overcome this problem, front faces having no air guide are known. However, the lack of an air guide does not provide an optimal fresh air supply, reducing the efficiency of the cooling system. To remedy this problem, there is also known an air guide composed of two different organic materials. These bi-material air guides are generally made of at least two polypropylene (PP) parts, one of the parts using a softer polypropylene. However, these bi-material air guides do not sufficiently limit the transmission of force by the air guide, and are therefore inefficient to preserve the cooling system in case of vehicle shocks. Finally, an air guide incorporating a high proportion of flexible materials, for example of the elastomer type, is also known. The flexibility of the materials makes it possible to absorb part of the impact, thus limiting the pressures exerted on the cooling system. However, air guides made of flexible materials are difficult to interface between the cooling system (flaps controlled ...) and the bumper because of their resistance (deformation due to flexibility). Moreover, these air guides of flexible materials are relatively expensive.
    [0002] The aim of the invention is to remedy these drawbacks by providing an air guide for a motor vehicle front end, making it possible to limit the transmission to the cooling system of the force exerted on the front face during a shock to the vehicle. before the vehicle. To achieve this, the air guide according to the invention comprises areas of mechanical weakness capable of shortening it along the X axis of the vehicle (longitudinal axis of the vehicle) during a frontal impact. Thus, the object of the invention relates to an air guide for a motor vehicle front end which comprises a duct for sealingly channeling the air entering from the front of the vehicle towards a cooling system, when the guide of air is mounted on the vehicle. The channel has areas of mechanical weakness, defining programmed areas of permanent deformation able to shorten it along the longitudinal axis (X axis) of the vehicle during deformation of said areas of mechanical weakness. These areas of mechanical weakness and so do not damage the cooling system in case of vehicle shock. Indeed, during a longitudinal impact of the vehicle generating a recoil of the front bumper, it exerts a push on the air guide (s) interfaced (s) between the bumper and the cooling system, and areas of mechanical weakness being calibrated to break under a certain level of effort, they deform and then break in order to limit the forces transmitted to the cooling system.
    [0003] The air guide according to the invention also limits the use of flexible material only at the bumper interface, to ensure a sealing area, thus reducing the cost of the part. Areas of mechanical weakness may include changes in thickness or material. For example, walls forming the channel may have a given overall thickness, and areas of mechanical weakness may then include areas thinned with respect to the overall thickness, said thinned areas forming lines of permanent deformation. Preferably, the zones of mechanical weakness form a continuous line in a substantially frontal section of the channel, so as to optimize the shortening of the channel. To optimize the shortening of the channel, it is also possible to define the number N of deformation lines in each wall of the channel, substantially parallel to the frontal plane (PF), as a function of the length of the air guide. According to one embodiment, the channel consists of a set of walls forming a quadrilateral in frontal section. According to one embodiment, each wall forming the channel is formed of at least two stepped planes, the surfaces forming an intersection between two stepped planes forming said zone of mechanical weakness. According to this embodiment, the intersections between two planes may be formed of a film of minimum thickness to ensure a seal. The minimum thickness being conventionally less than 0.2 mm, and the overall thickness of the walls 10 may be about 2 mm. Preferably, the minimum thickness is located in an area of the air guide capable of receiving the most effort in case of impact, such as the corners of the air guide. Finally, according to the invention, the air guide advantageously comprises a skirt of flexible material adapted to seal between the air guide and a bumper when the air guide is mounted on the vehicle. The invention also relates to a front face of a motor vehicle comprising at least one air guide according to the invention. The invention also relates to a motor vehicle comprising a front face 20 according to the invention. The invention will be better understood on reading the appended figures, which are provided by way of example and are in no way limiting, in which: FIG. 1 illustrates an example of an air guide according to the invention, mounted on a front of vehicle. Figures 2a-2d illustrate different solutions for making areas of mechanical weakness. Figure 3 shows a section along a plane Y of the vehicle (cross section) of an example of an air guide according to the invention. Figure 4a illustrates in detail two stair planes connected by a surface forming a zone of mechanical weakness. Figure 4b illustrates in detail the impact-induced deformation at the detail of Figure 4a. FIG. 5 illustrates a channel comprising, from the front to the rear of the vehicle, an increasing section, in contrast to the channel of FIG. 3. According to an example embodiment, illustrated in FIG. 1, the air guide (1 ) for front face (2) of a motor vehicle comprises a channel (3) for sealingly channeling air entering from the front of the vehicle (4) to a cooling system (5), when the air guide (1) is mounted on the vehicle. The channel (3) has a sagittal plane (PS), or "Y plane", parallel to the median plane of the vehicle separating the left half of the right half of the vehicle, and a transverse plane (PT), or "Z plane" "(Horizontal plane), parallel to a plane separating an upper part and a lower part of the vehicle, and a frontal plane (PF), or" X plane ", parallel to a plane separating a front part and a rear part of the vehicle . The transverse plane (PT) is perpendicular to the sagittal plane (PS). The frontal plane (PF) is perpendicular to the transverse (PT) and sagittal (PS) planes.
    [0004] According to the invention, the channel (3) comprises areas (6) of mechanical weakness, defining areas of permanent deformation capable of shortening it along the longitudinal axis (X axis) of the vehicle the air guide (1) during a deformation of these areas of mechanical weakness, in case of shock (CH) of the air guide in particular. The longitudinal axis of the channel (3) is an axis included in the sagittal plane (PS) of the channel (3).
    [0005] Thus, in case of recoil of the bumper: during small shocks at low speed, typically shocks occurring at speeds below 10km / h, such as a parking shock, the bumper, the air guide and the cooling system cash the efforts received without being damaged. during insurance-type shocks, at a higher speed, typically greater than 10 km / h and in particular 15 km / h, the fusibility of the air guide is exploited: the zones of mechanical weakness (6) of the air guide are first compressed, then the air guide (1) breaks in these areas of mechanical weakness (6), without damaging the cooling system (5).
    [0006] The channel (3) may consist of one or more plane walls or not, forming together a duct "relatively tight" to the air on its sides (side / top / bottom), and open at both ends (front / back). The channel may consist of several smaller channels contiguous (or not), for example optional during vehicle assembly, for example for a vehicle optionally having a RAS. It may also be, as illustrated in Figure 1, a set of walls (four walls in Figure 1) forming a quadrilateral in front section (section in the frontal plane (PF)). There are different solutions to achieve areas of mechanical weakness (6). For example, it is possible to make material changes, i.e. to use materials of lesser mechanical strength. It is also possible to make changes in thickness, that is to say local thinnings in the wall or walls forming the channel (3). Thus, the walls forming the channel (3) have a given overall thickness, and the areas of mechanical weakness (6) have areas thinned with respect to the overall thickness, said thinned areas forming lines of permanent deformation (by folding or Out). These thinned areas may be open windows (Figure 2d) if the leakage loss is not significant compared to the overall airflow. It is also possible to integrate specific shapes favoring the deformation in selected places, when the air guide is subjected to the shock stresses: level variation (figure 2a), slopes (figure 2b), junction in "bulldozer" (Figure 2c) ... These different solutions are illustrated in Figures 2a to 2d. It is also possible to combine these solutions. Advantageously, in order for these zones of mechanical weakness (6) to define zones of permanent deformation capable of longitudinally shortening the air guide (1), these zones (6) form a continuous line in a substantially frontal section of the air guide ( 1). The number N of deformation lines in each wall, substantially parallel to the frontal plane (PF), is defined as a function of the length of the air guide (1). Indeed, it requires enough deformation lines, so that, during an impact, the air guide is shortened enough to protect the cooling system. It is a dimensioning step accessible to the skilled person. According to one embodiment, each wall of the channel (3) has, along substantially the longitudinal axis of the vehicle, a section in the form of a staircase. Figure 3 shows a section along a Y plane of the vehicle (cross section). Thus, each wall consists of at least two planes stairs. Figure 4a illustrates in detail two stair planes connected by a surface forming a zone of mechanical weakness. Figure 4b illustrates in detail the impact-induced deformation at the detail of Figure 4a. During a shock, the stairs must be able to retract partially under each other. These relative displacements are possible (facilitated) if each level (step of the staircase) substantially keeps its flat shape to be able to slide 30 being guided under the following: the material thickness of the levels is thus chosen, according to said material, to maintain the rigidity of each level during the shock but also to break between two levels (zone of weakness) during the same shock. Shortening by retraction effect requires at least two levels, however it is preferable to provide more: for example, for a depth (in X) of air guide of 300 mm, and to be able to absorb an axial deformation of 150mm: with only two levels (and a zone of fragility), it would therefore be necessary for the retraction to be 100% (over 150mm) between these two levels with four levels (and three zones of fragility), just guarantee a " good »retraction 66% (over 50mm) between two successive levels Moreover, in real road shock, the impact may not be strictly frontal (ie not in Y0, but with a lateral shift relative to the position Y0, or at a non-zero angle with respect to the axis X ...), the conditions guiding the levels during the retraction are then not the same in any area of the air guide . It is thus easier to guarantee obtaining shortening by four or five levels than by only two.
    [0007] According to the example of Figure 1, the channel (3) is formed by four walls: two walls parallel to the transverse plane (PT) having a sagittal section in the form of stairs, and two walls parallel to the sagittal plane (PS) having a cross section in the form of a staircase. Thus, each wall consists of at least two planes stairs. Indeed, the stairs must be located preferably on all sides of the air guide to avoid a blockage of shortening. The two staircase planes are two substantially parallel planes linked by a surface substantially perpendicular to the planes. The intersecting surfaces between two staircase planes form areas of mechanical weakness (6).
    [0008] According to one embodiment, the intersections between two planes are formed of a film of minimum thickness. The minimum thickness is the smallest thickness that can be achieved by an injection molding process, while ensuring airtightness at intersections. According to an exemplary embodiment, the minimum thickness is less than 0.2 mm, and the overall wall thickness, outside the areas of mechanical weakness (6) is about 2 mm. According to alternative embodiments, the channel (3) may comprise, from front to rear of the vehicle, an increasing section (FIG. 5) or a decreasing section (FIG. 3). According to one or other of these variants, the stairs constituting the areas of mechanical weakness (6) are, in a given direction, rising or falling. According to alternative embodiments, the air guide (1) can be obtained as a single-piece molding or it can consist of several separately molded parts and then assembled subsequently (according to, for example, the conditions of accessibility and mounting on a vehicle): the junctions between each part may advantageously comprise forms promoting sealing, for example by grooves and ribs overlapping at the workpiece edge. According to a preferred embodiment, these zones of mechanical weakness (6) are located in the parts of the air guide (1) having a higher mechanical rigidity. Indeed, these parts of high mechanical rigidity are less able to deform in case of impact. They may therefore transmit excessive forces to the cooling system. These more rigid parts are in particular the junction between the vertical side walls and the horizontal walls generating a rigidity by "corner effect" or "box effect", because each wall behaves as a reinforcing rib for the other wall. Thus, areas of mechanical weakness (6) are present: in priority, in the most rigid parts by "corner or box" effect; then in the parts adjoining these rigid parts; finally, optionally but preferably, between these rigid parts. The number of stepped planes on a wall is defined according to the length of the air guide (1). Indeed, enough deformation lines are needed so that, during an impact, the air guide is shortened enough to protect the cooling system. The air guide (1) advantageously comprises a skirt or sheath (7) of flexible material adapted to seal between the air guide and a bumper (8) when the air guide is mounted on the vehicle. The air guide (1) advantageously comprises a means of support and attachment (9) of the air guide (1) on the cooling system (5). The invention also relates to a front face of a motor vehicle comprising at least one air guide (central or RAS) according to the invention. The invention also relates to a motor vehicle having a front face according to the invention. 25
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. An air guide (1) for the front face (2) of a motor vehicle comprises a channel (3) for sealing the air entering from the front of the vehicle (4) to a cooling system (5), when the air guide (1) is mounted on the vehicle, characterized in that the channel (3) has areas of mechanical weakness (6), defining programmed areas of permanent deformation able to shorten along the longitudinal axis of the vehicle the air guide (1) during deformation of said areas of mechanical weakness (6).
    [0002]
    2. Air guide (1) according to claim 1, wherein the areas of mechanical weakness (6) comprise changes in thickness or material.
    [0003]
    3. An air guide (1) according to claim 2, wherein walls forming the channel (3) have a given overall thickness, and areas of mechanical weakness (6) have areas thinned with respect to the overall thickness. said thinned zones forming lines of permanent deformation.
    [0004]
    4. Air guide (1) according to one of the preceding claims, wherein the areas of mechanical weakness (6) form a continuous line in a substantially frontal section of the channel (3).
    [0005]
    5. An air guide (1) according to one of the preceding claims, wherein the number N of deformation lines in each wall of the channel (3), substantially parallel to the front plane (PF), is defined according to the length of the air guide (1).
    [0006]
    6. Air guide (1) according to one of the preceding claims, wherein the channel (3) consists of a set of walls forming a quadrilateral front section.
    [0007]
    7. Air guide (1) according to one of the preceding claims, wherein each wall forming the channel (3) is formed of at least two planes in stairs, the surfaces forming an intersection between two staircase planes forming said area. mechanical weakness.
    [0008]
    8. Air guide (1) according to claim 7, wherein the intersections between two planes are formed of a film of minimum thickness to ensure a seal.
    [0009]
    An air guide (1) according to claim 8, wherein the minimum thickness is less than 0.2mm, and the overall wall thickness is about 2mm.
    [0010]
    10. Air guide (1) according to claim 9, wherein the minimum thickness is located in an area of the air guide (1) likely to receive the most effort in case of shock, such as corners of the air guide (1).
    [0011]
    11. Air guide (1) according to one of the preceding claims, comprising a skirt of flexible material adapted to seal between the air guide and a bumper when the air guide is mounted on the vehicle.
    [0012]
    12. Front face (2) of a motor vehicle having at least one air guide (1) according to one of the preceding claims.
    [0013]
    Motor vehicle having a front face (2) according to claim 12.5
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    同族专利:
    公开号 | 公开日
    EP3174748A1|2017-06-07|
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    WO2016016549A1|2016-02-04|
    RU2017106563A|2018-09-03|
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    US10226994B2|2019-03-12|
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    US20170246949A1|2017-08-31|
    FR3024406B1|2017-12-15|
    JP6832272B2|2021-02-24|
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    法律状态:
    2015-08-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-02-05| PLSC| Publication of the preliminary search report|Effective date: 20160205 |
    2016-08-25| PLFP| Fee payment|Year of fee payment: 3 |
    2017-08-30| PLFP| Fee payment|Year of fee payment: 4 |
    2018-08-21| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-08| ST| Notification of lapse|Effective date: 20200406 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1457540A|FR3024406B1|2014-08-01|2014-08-01|AIR GUIDE FOR FRONT PANEL OF MOTOR VEHICLE COMPRISING ZONES OF WEAKNESS MECHANICAL|FR1457540A| FR3024406B1|2014-08-01|2014-08-01|AIR GUIDE FOR FRONT PANEL OF MOTOR VEHICLE COMPRISING ZONES OF WEAKNESS MECHANICAL|
    RU2017106563A| RU2675424C2|2014-08-01|2015-07-23|Air duct for front surface of motor vehicle containing mechanical weakness areas|
    EP15753398.5A| EP3174748B1|2014-08-01|2015-07-23|Motor vehicle front surface air guide comprising mechanical weakness areas|
    CN201580044521.XA| CN106573532B|2014-08-01|2015-07-23|The air guide device including mechanical weakness zone for motor-driven front face|
    ES15753398.5T| ES2689557T3|2014-08-01|2015-07-23|Air guide for front face of motor vehicle comprising areas of mechanical weakness|
    PCT/FR2015/052020| WO2016016549A1|2014-08-01|2015-07-23|Motor vehicle front surface air guide comprising mechanical weakness areas|
    MX2017001274A| MX2017001274A|2014-08-01|2015-07-23|Motor vehicle front surface air guide comprising mechanical weakness areas.|
    JP2017504738A| JP6832272B2|2014-08-01|2015-07-23|Automatic vehicle front air guide with mechanically vulnerable areas|
    US15/329,621| US10226994B2|2014-08-01|2015-07-23|Motor vehicle front surface air guide comprising mechanical weakness areas|
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