JP2017165182A - Aerodynamic parts to be mounted on wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the rolling resistance of a tire and also to enable cooling of a brake attached to a wheel of the tire.SOLUTION: Aerodynamic parts according to some embodiments to be mounted on a wheel include a plurality of wind receiving plates radially arranged along a circumferential direction radially on a vehicle inner side surface of a tire portion or a wheel portion. Each of the plurality of wind receiving plates has a triangular surface shape, and a first side of the surface shape is arranged so that the amount of protrusion toward the inside of the vehicle gradually increases from the outer peripheral side of the vehicle inner side surface to the center side.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an aerodynamic component attached to a wheel that can reduce running resistance during running and can promote brake cooling.

In recent years, social demands for lower fuel consumption of vehicles are still increasing. As one of the measures, Patent Documents 1 to 3 attach a rotational force generating blade to the tire portion or wheel portion of the wheel to reduce the wind resistance against the tire or generate a force that assists the vehicle during traveling. Thus, proposals have been made to reduce the rolling resistance of the wheels.
Further, in Patent Document 4, in order to reduce tire wear at the time of landing of an aircraft, a proposal has been made in which fins are provided on a wheel of a tire so that a force received from traveling wind is applied to the wheel to rotate the wheel. ing.

JP 2006-44473 A Utility Model No. 3188399 JP 2006-44474 A JP 2002-154485 A

  In Patent Documents 1 to 3, as described above, means for reducing the rolling resistance of the wheel is disclosed, but in addition, means for enabling cooling of the brake device attached to the wheel is not disclosed. .

  In view of these technical problems, some embodiments of the present invention aim to reduce the rolling resistance of the wheel and, at the same time, allow cooling of the brake device attached to the wheel.

(1) An aerodynamic component attached to a wheel according to some embodiments includes a plurality of wind receiving plates arranged in a circumferential direction on a vehicle inner side surface of the wheel, and each of the plurality of wind receiving plates includes: It is arranged radially along the radial direction of the vehicle inner side surface, has a triangular surface shape, and the first side of the surface shape protrudes from the outer peripheral side of the vehicle inner side surface toward the center side toward the vehicle inner side. Arranged so that the amount gradually increases.
According to the configuration of (1) above, when the wind receiving plate of the above configuration rotates together with the wheel while the vehicle is running, and the wind receiving plate is below the center of rotation of the wheel and at the front side in the vehicle traveling direction. When the traveling wind hits the wind plate, a rotation assist force that rotates the wheel in the traveling direction is generated. As a result, a force that helps the vehicle travel is generated, and the rolling resistance of the wheels can be reduced.
In addition, during traveling of the vehicle, the pressure on the inner side and the outer side of the wheel is generally lower on the outer side, and thus the air pressure is lower than the inner side. Therefore, the traveling wind flows from the inside to the outside through a gap formed inside and outside the wheel. Further, when the wind receiving plate is at the front side in the vehicle traveling direction, the wind receiving plate moves from the upper side to the lower side by the rotation of the wheel. Will occur. Because the vertical wind vortex stirs the traveling wind flowing through the wheel from the inside to the outside of the wheel, the cooling effect of the brake device provided on the wheel can be enhanced.

The “longitudinal vortex” here refers to a vortex that is generated so as to flow from the lower side to the upper side around the first side of the wind receiving plate as described above.
The “wheel portion” referred to herein refers to a tire support portion inside the tire portion in a wheel having a tire portion on the outer peripheral side, and refers to the entire wheel in a wheel that does not include the tire portion.

(2) In some embodiments, in the configuration of (1), an angle formed between the first side of the wind receiving plate and the vehicle inner side surface is 20 to 80 degrees.
According to the configuration of (2), when the first side of the wind receiving plate is in the angular range with respect to the vehicle inner side surface, a vertical vortex can be formed around the first side. The cooling effect of the brake device by the traveling wind flowing through the wheels can be enhanced by the stirring action of the vertical vortex.

(3) In some embodiments, in the configuration of (1) or (2), the wind receiving plate is disposed so as to be inclined vertically with respect to a radial line segment passing through the center of the vehicle inner side surface. The Hereinafter, the inclination angle of the wind receiving plate that is inclined with respect to the radial line segment is also referred to as “attack angle”.
According to the configuration of (3) above, the formation of the vertical vortex can be promoted by providing the angle of attack of the wind receiving plate. Thereby, the stirring action by the vertical vortex can be enhanced, and the cooling effect of the brake device can be improved.

(4) In some embodiments, in the configuration of any one of (1) to (3), the wind receiving plate can change an angle with respect to a radial line segment passing through a center of the vehicle inner side surface. Attached to the inner side of the vehicle.
According to the configuration of (4) above, the rotation assist force and the cooling effect of the brake device can be appropriately adjusted by adjusting the angle of attack of the wind receiving plate. However, by increasing the angle of attack, the generation of vertical vortices can be promoted, but conversely the air resistance increases. Further, when the wind receiving plate is at the front position in the vehicle traveling direction, the air resistance and the rotation assisting force are approximately proportional. Therefore, it is necessary to set the angle of attack in accordance with the purpose, whether to focus on cooling of the brake device or to increase the rotation assist force.

(5) In some embodiments, in the configuration of any one of (1) to (4), the wind receiving plate has a flat plate shape.
According to the configuration of (5) above, the wind receiving plate is formed into a flat plate shape, whereby the wind receiving plate can be manufactured and attached to the wheel at a low cost.

(6) In some embodiments, in any one of the configurations (1) to (4),
The wind receiving plate has an airfoil in cross section.
According to the configuration of the above (6), by making the cross section of the wind receiving plate into an airfoil, a difference in traveling wind pressure is provided between the downstream side in the wheel rotation direction and the upstream side in the wheel rotation direction of the wind receiving plate. Can do. That is, by reducing the pressure on the downstream side in the wheel rotation direction from the pressure on the upstream side in the wheel rotation direction, the generation of the vertical vortex can be promoted.

(7) In some embodiments, in any one of the configurations (1) to (6), provided on the second side of the wind receiving plate formed on the radial center side of the vehicle inner side surface, It further includes a plate-like flap that forms an obtuse angle with respect to the downstream side surface in the rotational direction of the wind receiving plate.
Here, the “obtuse angle” refers to an angle exceeding 90 ° and less than 180 °.
According to the structure of said (7), when the wind receiving plate exists in the vehicle traveling direction front position by providing the said flap, a rotation assistance force can be increased by increasing the air resistance with respect to traveling wind.

(8) In the exemplary embodiment, in any one of the configurations (1) to (7), a recess is formed on the vehicle inner side surface to which the wind receiving plate is attached.
According to the configuration of (8) above, when the wind receiving plate is at the front position in the vehicle traveling direction by forming the concave portion, the rotation assisting force can be increased by increasing the air resistance against the traveling wind.
Further, by forming the concave portion, the area of the upper surface of the wind receiving plate that receives the traveling wind increases, thereby increasing the wind speed of the traveling wind passing through the upper surface of the wind receiving plate, and the traveling wind on the upper surface side of the receiving plate. The pressure is lower than the traveling wind pressure on the lower surface of the wind receiving plate. Therefore, generation | occurrence | production of the said vertical vortex which goes around the said 1st edge | side from the downward to the upper direction can be promoted.

(9) In some embodiments, in any one of the configurations (1) to (8), a bumper is provided in front of the vehicle body of the wheel at a position below a vertical center of the vehicle inner side surface, When the wind receiving plate is at the front end position in the vehicle traveling direction, a notch is formed in the bumper at the vehicle body front position of the wind receiving plate.
When the bumper at the front position in the traveling direction from the wheel is above the wheel center position or the wheel center position, the traveling wind can be sufficiently applied to the wind receiving plate.
According to the configuration of (9) above, even when the bumper is located below the center of the wheel, the ventilation space is formed so that the traveling wind can be applied to the wind receiving plate through the ventilation space. Thus, the rotation assist force and the cooling effect of the brake device can be maintained.

(10) In some embodiments, in the configuration according to any one of (1) to (8), a bumper provided at a position below a vertical center of the vehicle inner side surface is provided in front of the vehicle body of the wheel, When the wind receiving plate is at the front end position in the vehicle traveling direction, a duct having an axis line in the longitudinal direction of the vehicle body is formed in the bumper at a position in front of the vehicle body of the wind receiving plate.
According to the configuration of (10) above, even when the bumper is located below the center of the wheel, the ventilation space is formed, so that traveling wind can be applied to the wind receiving plate through the ventilation space. Thus, the rotation assist force and the cooling effect of the brake device can be maintained.

  According to some embodiments of the present invention, the rolling resistance of the tire is reduced, and at the same time, the brake device attached to the tire can be cooled.

It is a front view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a side view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a plane view sectional view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a top view of the aerodynamic components with which the wheel concerning one embodiment is equipped. It is a graph which shows the relationship between the angle of attack of the wind receiving plate which concerns on one Example, rotation auxiliary power, and the cooling effect of a brake device. It is a perspective view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a perspective view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a perspective view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a perspective view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a front view of the aerodynamic component with which the wheel concerning one embodiment is equipped. It is a front view of the aerodynamic component with which the wheel concerning one embodiment is equipped.

Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in these embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Only.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of other constituent elements.

As shown in FIGS. 1 and 2, the aerodynamic component 10 mounted on a wheel according to some embodiments includes a plurality of wind receiving plates 14 arranged on the vehicle inner side surface of the wheel 12 in the circumferential direction. Each of the plurality of wind receiving plates 14 is arranged radially along the radial direction. As shown in FIG. 1, each wind receiving plate 14 has a triangular surface shape, and the outer peripheral side of the vehicle inner side surface of the wheel 12 that forms this surface shape and the first side 16 that is one side of the triangle has a circular shape. The amount of protrusion gradually increases from the center toward the center.
According to the above configuration, the wind receiving plate 14 rotates together with the wheels 12 while the vehicle is traveling. When the wind receiving plate 14 is at the front side of the vehicle 12 in the vehicle traveling direction, the traveling wind w hits the wind receiving plate 14 to generate a rotational assist force that rotates the wheel 12 in the vehicle traveling direction (arrow a direction). As a result, a force that helps the vehicle travel is generated, so that the rolling resistance of the wheel 12 can be reduced.

Further, during traveling of the vehicle, since the flow velocity of the traveling wind w is generally greater on the outer side and the outer side of the wheel 12 in the vehicle width direction, the atmospheric pressure is lower than the inner side. Therefore, as shown in FIG. 3, the traveling wind w flows from the inside to the outside through the gap formed in the wheel 12.
Further, when the wind receiving plate 14 is at the front side position in the vehicle traveling direction, the wind receiving plate 14 moves from the upper side to the lower side by the rotation of the wheel 12, so that the periphery of the first side 16 of the wind receiving plate 14 is moved from the lower side to the upper side. A flowing vertical vortex e is generated. Since the traveling wind w crossing the wheel 12 from the inside to the outside is agitated by the vertical vortex e, the cooling effect of the brake device 18 provided on the wheel 12 can be enhanced.

In the embodiment shown in FIG. 2, the wheel 12 is a front wheel, and the plurality of wind receiving plates 14 are arranged at equal intervals in the circumferential direction of the wheel 12. The equidistant arrangement is preferable in view of the weight balance of the wheel 12 and the load balance.
The upper half of the wheel 12 is disposed inside the wheel house 23, and a bumper 24 is provided at a front position of the wheel 12 in the vehicle traveling direction. In this embodiment, the wind receiving plate 14 located in the upper half of the wheel 12 does not directly receive the traveling wind w as a shadow of the bumper 24 in the front view of the vehicle. Accordingly, when the traveling wind w hits the wind receiving plate 14 located in the upper half of the wheel 12, the rotational force generated in the wheel 12 opposite to the traveling direction of the vehicle can be almost ignored.
In the embodiment shown in FIG. 3, the wheel 12 has a tire portion 22 outside the wheel portion 20. The wind receiving plate 14 is attached to the vehicle inner side surface of the wheel portion 20, but may be attached to the tire portion 22. For example, when the wind receiving plate 14 is attached to the tire portion 22, the wind receiving plate made of the same material as the tire portion 22 can be integrally vulcanized with the tire portion 22.

  In FIG. 1, the line C is the rotation center axis of the wheel 12. In FIG. 2, the point O is the rotation center point of the wheel 12, and the arrow r indicates the rotation direction of the wheel 12. The wheel 12 illustrated in FIGS. 1 to 3 is a front wheel, and a bumper 24 is provided in front of the vehicle body of the wheel 12. As shown in FIG. 3, gaps through which the traveling wind w can pass are formed between the bumper 24 and the wheel 12, between the vehicle body 26 behind the wheel and the wheel 12, and in the wheel portion 20 of the wheel 12. The

In some embodiments, as shown in FIG. 1, the angle α formed by the first side 16 of the wind receiving plate 14 and the vehicle inner side surface of the wheel 12 is 20 to 80 °.
The formation of the vertical vortex e around the first side 16 can be promoted by the angle α being in the above angle range. The vertical vortex e stirs the traveling wind w, so that the cooling effect of the brake device 18 by the traveling wind w flowing through the wheels 12 can be enhanced.
Preferably, the angle α is 20 to 40 °. With this angle, it was confirmed by tests and simulations that the stirring effect of the running wind w in the vicinity by the vertical vortex e can be exhibited most.

In some embodiments, as shown in FIG. 2, the wind receiving plate 14 has an angle β (hereinafter also referred to as “attack angle β”) with respect to a radial line segment b passing through the rotation center point O of the wheel portion 20 or the tire portion 22. .) Is attached to the vehicle inner side surface of the wheel 12.
Thus, the formation of the vertical vortex e can be promoted by attaching the wind receiving plate 14 with the angle of attack β. Thereby, the stirring effect of the running wind w in the vicinity by the vertical vortex e can be enhanced, and the cooling effect of the brake device 18 by the running wind w that is stirred and passes through the gap between the wheels 12 can be improved.

In the exemplary embodiment, as shown in FIG. 4, the wind receiving plate 14 is attached so that the angle of attack β with respect to the radial line segment b can be changed. By making the angle of attack β adjustable, the rotation assisting force by the wind receiving plate 14 and the cooling effect of the brake device 18 can be appropriately adjusted. However, as described above, by increasing the angle of attack β, the generation of the longitudinal vortex e can be promoted, but the air resistance increases conversely. Further, when the wind receiving plate 14 is at the front position in the vehicle traveling direction, the air resistance and the rotation assisting force are substantially proportional. Therefore, it is necessary to set the angle of attack β according to the purpose, whether to focus on the cooling of the brake device 18 or to increase the rotation assist force.
In the illustrated embodiment, the wind receiving plate 14 is attached to the drive unit 27 via a rotation shaft 27a. The drive unit 27 is fixed to the wheel unit 20.

There is a correlation shown in FIG. 5 between the rotation assist force due to the change in the angle of attack β of the wind receiving plate 14 and the cooling effect of the brake device 18. FIG. 5 shows the correlation when using a wind receiving plate 14 having a cross section of an airfoil. In the drawing, the horizontal axis indicates the angle of attack β. As shown in FIG. 2, the angle of attack β is positive (+) indicates that the wind receiving plate 14 is inclined downstream in the wheel rotation direction with respect to the radial line segment b, and the angle of attack β is negative (−). Means that the wind receiving plate 14 is inclined to the upstream side in the wheel rotation direction with respect to the radial line segment b.
From FIG. 5, it can be seen that the rotation assist force increases when the angle of attack β is set to the plus (+) side, and the cooling effect of the brake device 18 is enhanced when the angle of attack β is set to the minus (−) side. It can also be seen that the cooling effect of the brake device 18 is greater when the angle of attack β is zero.
In the embodiment shown in FIG. 4, the wind receiving plate 14 is attached to the wheel portion 20 so as to be rotatable about a rotation shaft 27a.

In the exemplary embodiment, as shown in FIG. 2, the wind receiving plate 14 is formed in a flat plate shape.
Thus, by making the wind receiving plate 14 into a flat plate shape, the performance of the wind receiving plate 14 and the attachment to the wheel 12 can be made at low cost.

In the exemplary embodiment, as shown in FIG. 6, the wind receiving plate 14 is formed to have an airfoil in cross section.
By making the cross section of the wind receiving plate 14 into an airfoil, the pressure of the traveling wind w on the downstream side surface 28 side in the wheel rotation direction of the wind receiving plate 14 can be made smaller than the pressure of the traveling wind w on the upstream side surface 30 side. As a result, the formation of the vertical vortex e is promoted, so that the rotation assist force by the wind receiving plate 14 can be increased, and the cooling effect of the brake device 18 can be improved by the stirring action of the vertical vortex e.

In some exemplary embodiments, as shown in FIGS. 7 and 8, the second side 34, which is one of the sides forming the triangular surface shape of the wind receiving plate 14, is arranged on the vehicle inner side of the wheel 12. The side surface 32 is formed on the center side in the radial direction. The second side 34 includes plate-like flaps 36 and 38 that form an obtuse angle with respect to the downstream side surface 28 of the wind receiving plate 14.
The “obtuse angle” here refers to an angle exceeding 90 ° and less than 180 ° as described above.
By providing the flap 36 or 38, when the wind receiving plate 14 is at the front side in the vehicle traveling direction, the rotation assisting force can be increased by the flaps 36 and 38 receiving the traveling wind w.

In the illustrated embodiment, the first side 36a of the flap 36 is formed along the vehicle inner side surface 32 of the wheel 12, and the surface shape of the flap 36 is a right triangle in which the first side 36a and the second side 34 intersect at a right angle. It has become. Therefore, the main area of the surface shape of the flap 36 is disposed at a position close to the vehicle inner side surface 32. As a result, the flap 36 does not interfere with the flow of the vertical vortex e formed from the lower side to the upper side of the first side 16.
The flap 38 has a quadrangular shape in which the first side 38 a is formed along the vehicle inner side surface 32, and is formed at a portion of the second side 34 close to the vehicle inner side surface 32. Therefore, like the flap 36, the main area of the surface shape of the flap 38 is arranged at a position close to the vehicle inner side surface 32. Thereby, the flap 38 does not obstruct the flow of the vertical vortex e formed from the lower side to the upper side of the first side 16.

In the exemplary embodiment, as shown in FIG. 9, a recess 40 is formed on the vehicle inner side surface 32 of the wheel 12 to which the wind receiving plate 14 is attached.
In this way, the recess 40 is formed, and the area receiving the traveling wind w on the upper surface of the wind receiving plate 14 is widened, so that the air resistance to the traveling wind w increases when the wind receiving plate 14 is in the front position in the vehicle traveling direction. In addition, the rotation assist force can be increased.
Further, by forming the recess 40, the area of the upper surface of the wind receiving plate that receives the traveling wind w is widened. As a result, the wind speed of the traveling wind w passing through the upper surface of the wind receiving plate is increased, and traveling on the upper surface side of the wind receiving plate is performed. The pressure of the wind w is lower than the pressure of the traveling wind on the lower surface side of the wind receiving plate. Therefore, it is possible to promote the generation of the vertical vortex e that goes around the first side 16 from below to above.

In the exemplary embodiment, as shown in FIG. 10, a bumper 24 is provided in front of the vehicle body of the wheel 12 at a position below the center of the vehicle inner side surface 32 in the vertical direction. When the wind receiving plate 14 is at the front end position in the vehicle traveling direction, a notch 42 is formed in the bumper 24 at the vehicle body front position of the wind receiving plate 14.
According to the above configuration, the traveling wind w can be applied to the wind receiving plate 14 through the notch 42. Thus, even when the bumper 24 is located below the center of the vehicle inner side surface 32 in the vertical direction, the traveling wind w that strikes the wind receiving plate 14 can be secured. The cooling effect can be demonstrated.

In the exemplary embodiment, as shown in FIG. 11, the bumper 24 is provided at a position below the center of the vehicle inner side surface 32 as in the above embodiment. When the wind receiving plate 14 is at the front end position in the vehicle traveling direction, a duct 44 having an axis line in the longitudinal direction of the vehicle body is formed at the vehicle body front position of the wind receiving plate 14.
According to the above configuration, traveling wind flowing from the duct 44 to the wind receiving plate 14 can be formed. Therefore, even when the bumper 24 is located below the vertical center of the vehicle inner side surface 32, the traveling wind w that strikes the wind receiving plate 14 can be secured. The cooling effect can be demonstrated.

  According to some embodiments of the present invention, the rolling resistance of the wheel is reduced, and at the same time, the brake device attached to the wheel can be cooled.

DESCRIPTION OF SYMBOLS 10 Aerodynamic parts 12 Wheel 14 Wind receiving plate 16 1st edge 34 2nd edge 18 Brake device 20 Wheel part 22 Tire part 23 Wheel house 24 Bumper 26 Car body 27 Drive part 27a Rotating shaft 28 Wheel rotation direction downstream side surface 30 Wheel rotation direction Upstream side 32 Vehicle inner side 36, 38 Flap 36a, 38a First side 40 Recess 42 Notch 44 Duct C Rotation center axis O Rotation center point a Running direction b Radial line segment e Longitudinal vortex w Running wind β Angle of attack

Claims (10)

A plurality of wind receiving plates arranged in the circumferential direction on the vehicle inner side surface of the wheel,
Each of the plurality of wind receiving plates is arranged radially along the radial direction of the vehicle inner side surface and has a triangular surface shape, and the first side of the surface shape is the outer peripheral side of the vehicle inner side surface. An aerodynamic component mounted on a wheel, characterized in that the amount of protrusion toward the inside of the vehicle gradually increases from the center toward the center.   2. The aerodynamic component mounted on a wheel according to claim 1, wherein an angle formed by the first side of the wind receiving plate and the inner side surface of the vehicle is 20 to 80 °.   The aerodynamic component mounted on a wheel according to claim 1, wherein the wind receiving plate is disposed so as to be inclined up and down with respect to a radial line segment passing through a center of the vehicle inner side surface.   The wheel according to any one of claims 1 to 3, wherein the wind receiving plate is attached to the vehicle inner side surface so that an angle with respect to a radial line segment passing through a center of the vehicle inner side surface can be changed. Aerodynamic parts to be mounted on.   The aerodynamic component attached to the wheel according to any one of claims 1 to 4, wherein the wind receiving plate is a flat plate shape.   The aerodynamic component attached to a wheel according to any one of claims 1 to 4, wherein the wind receiving plate has an airfoil in cross section.   It further includes a plate-like flap that is provided on a second side of the wind receiving plate formed on the radially inner side of the vehicle inner side surface and forms an obtuse angle with the downstream side surface in the rotation direction of the wind receiving plate. An aerodynamic component attached to a wheel according to any one of claims 1 to 6.   The aerodynamic component attached to a wheel according to any one of claims 1 to 7, wherein a concave portion is formed on an inner side surface of the vehicle to which the wind receiving plate is attached. A bumper provided at a position lower than the vertical center of the vehicle inner side surface in front of the vehicle body of the wheel;
9. The notch is formed in the bumper at the front position of the vehicle body of the wind receiving plate when the wind receiving plate is at the front end position in the vehicle traveling direction. Aerodynamic parts mounted on the wheels of the car. A bumper provided at a position lower than the vertical center of the vehicle inner side surface in front of the vehicle body of the wheel;
9. The duct according to claim 1, wherein a duct having an axial line in the longitudinal direction of the vehicle body is formed in the bumper at a front position of the vehicle body of the wind receiving plate when the wind receiving plate is at a front end position in the vehicle traveling direction. An aerodynamic component attached to the wheel according to any one of the preceding claims.

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