JP2006327281A - Fairing device of tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fairing device of a tire capable of improving cross wind stability by weakening and guiding an air current around the tire flowing toward the tire through a lower surface of a car body from the diagonal front of the car body by the cross wind in hitting the tire even when the vehicle receives the cross wind. <P>SOLUTION: Left and right air current receiving surfaces 13, 13 of a fairing body 11 are projected below the car body from bumper facial side lower surface parts 26, 26 so as to hang in a plate shape and provided close to and faced with each of front surfaces 41, 41 of left and right tires 40, 40, the air current receiving surfaces 13, 13 have an angle θ relative to a virtual parallel line LA in parallel with the front surfaces 41, 41 of the left and right tires 40, 40 in plan view, and each of the air current receiving surfaces 13, 13 is diagonally provided relative to each of the front surfaces 41, 41 of the left and right tires 40, 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a tire fairing device that is provided in front of a vehicle body relative to a tire and guides an airflow around the tire flowing on the lower surface of the vehicle body toward the tire.

  Conventionally, the tire pressure has been reduced by reducing the wind pressure received by the tire and the airflow in the wheelhouse, and adjusting the airflow that flows toward the front of the tire from the bottom of the car body to improve straight running stability and steering stability at high speeds. A tire fairing device that guides the airflow is proposed.

As a conventional tire fairing device for guiding the airflow around the tire, a device formed in the following lift reduction device is known.
This lift reduction device comprises a flat plate that forms the main part of an under cover that covers the lower front side of the engine room, and a V-shaped protrusion that is formed to project downward from the flat plate and is V-shaped in plan view. The V-shaped projection includes a V-shaped apex portion located on the vehicle center line, and a pair of left and right projecting portions extending linearly obliquely rearward from the apex portion.

Further, the relationship between the V-shaped protrusion and the left and right tires is set so that the left and right tires are positioned in the vehicle inner region with respect to the extension line from the left and right end portions of the left and right protrusions.
The lift reducing device is designed to reduce the air resistance and to obtain a lift reducing effect. In addition, the lift reducing device is more effective than the left and right end portions of the left and right protrusions formed on the V-shaped protrusions. The airflow that flows to the side can be guided so as to flow to the outside of the tire, so that the airflow involved in the tire can be reduced.
(For example, refer to Patent Document 1).
JP-A-8-142929

  However, the conventional techniques described above have the following problems. That is, in the above-described prior art, the left and right tires are located in the vehicle inner side region with respect to the extension line from the left and right end portions of the left and right protrusion portions formed on the V-shaped protrusion. Therefore, the left and right terminal portions are not extended to a position facing the front surface of the tire. In addition, when the left and right end portions are arranged close to the tire, the airflow flowing through the left and right protrusion portions is guided so as to directly hit the tire from the left and right end portions.

  For this reason, the left and right terminal portions are arranged at positions farther from the front of the vehicle than the tires in order to guide the airflow flowing to the side of the vehicle body from the left and right terminal portions to flow outside the tire without being caught in the tire. It must be. Therefore, for crosswinds that receive airflow from the diagonally forward direction of the vehicle to the tires when the vehicle is traveling, airflow that has been bent toward the vehicle center by receiving crosswinds in a spaced space between the left and right end portions and the tires and Since the airflow over the left and right protrusions hits the front surface of the tire, there is a problem that the effect as a tire fairing device cannot be achieved when the vehicle receives a crosswind.

  The present invention has been made paying attention to the above problems, and even when the vehicle receives a crosswind, the crosswind causes the airflow around the tire flowing toward the tire from the diagonally lower side of the vehicle body to hit the tire. An object of the present invention is to provide a tire fairing device that can guide and improve the crosswind stability.

In order to achieve the above object, in the present invention,
A tire fairing device having a pair of left and right fairing bodies, which is provided in front of the vehicle body rather than the tire and guides the airflow around the tire flowing toward the tire on the lower surface of the vehicle body,
The fairing body has an airflow receiving surface that receives an airflow flowing toward the tire on the lower surface of the vehicle body,
The airflow receiving surface is inclined with an angle with respect to the vehicle body width direction so that the vehicle body center side end of the airflow receiving surface is closer to the tire than the vehicle side side end of the airflow receiving surface, It is close to the front surface and is provided facing each other.

  In the present invention, the air flow receiving surface of the fairing body is disposed so as to be inclined in plan view so that the vehicle body center side end is closer to the tire than the vehicle body side side end. In other words, the airflow receiving surface of the fairing body is directed in a direction in which the airflow flowing toward the front surface of the tire is more widely applied to the flow of airflow obliquely from the front of the vehicle body. The airflow that flows toward the can be applied efficiently. Therefore, the lateral force of the tire can be weakened, the air resistance of the tire can be reduced, and the lateral wind stability can be improved.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the tire fairing apparatus of the present invention will be described below based on Examples 1 to 2 shown in the drawings.

First, the configuration of the first embodiment will be described.
FIG. 1 shows a front bumper fascia provided at the front end of a vehicle to which the tire fairing device according to the first embodiment is applied. FIG. 2 is a perspective view showing a fairing body of the tire fairing device of Example 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 1 showing the fairing body of the tire fairing device of Example 1. FIG. 4 is an operation explanatory diagram of the tire fairing device according to the first embodiment.

  In the tire fairing device 10 according to the first embodiment, as shown in FIG. 1, left and right end portions 24 of the front bumper fascia 20, left and right lower surfaces 25, 25 are provided on the rear side of the bumper fascia 20. The left and right bumper facer side lower surface portions 26, 26 extending to the front end portion of the wheel house (not shown) are attached with fixing tools such as screws (not shown).

  A bumper facer main lower surface portion 23 is formed on the central lower surface 22 of the bumper facer 20 so that the central lower surface 22 extends rearward of the vehicle body, and a rear end portion 27 of the main body lower surface portion 23 is formed on the vehicle body. A chin spoiler 30 that protrudes downward and is integrally formed with the main body lower surface portion 23 is formed. The chin spoiler 30 reduces the generation of lift by suppressing the inflow of air into the lower surface of the vehicle body during high speed traveling.

  As shown in FIGS. 2 and 3, the tire fairing device 10 includes an attachment surface 12 that is attached and fixed to the left and right bumper facer lower surface portions 26 and 26 of the bumper facer 20 that is a vehicle body side component. The fairing body 11 includes an airflow receiving surface 13 integrally extending downward from the mounting surface 12.

  The airflow receiving surface 13 is a surface that receives the airflow a flowing on the lower surface of the vehicle body toward the tire, and the left and right airflow receiving surfaces 13, 13 are plate-shaped as shown in FIGS. 1, 3, and 4. Projecting downward from the bumper facer-side lower surface portions 26, 26 so as to hang down on the vehicle body, and provided in close proximity to and facing the front surfaces 41, 41 of the left and right tires 40, 40, respectively. The planes 13 and 13 have an angle θ with respect to a virtual parallel line LA that is parallel to the front surfaces 41 and 41 of the left and right tires 40 and 40 in plan view, and the front surfaces 41 and 41 of the left and right tires 40 and 40, respectively. On the other hand, the respective air flow receiving surfaces 13 and 13 are inclined.

  Further, the fairing body 11 is provided with a bumper so that the vehicle body center side end 131 of the airflow receiving surface 13 is inclined in plan view so as to be closer to the tire 40 than the vehicle body side side end 132 of the airflow receiving surface 13. The facer side lower surface portion 26 is attached. The inclination angle is set to 20 °. In the experimental value when the angle of inclination is set to 20 °, the crosswind stability (CYM) value becomes 0.1 to 0.14 under conditions and wind speed 15 to 20 m / sec, which can be reduced by about 0.012. It was.

The inclination angle θ is selected in the range of 15 ° to 35 ° according to the design of the vehicle body, the outer shape, the tire position / size, and the like.
The length in the vehicle width direction of the airflow receiving surface 13 of the fairing body 11 (the width of the airflow receiving surface 13) is set to the same length as the width of the tire 40, and the drooping height (up and down of the airflow receiving surface 13). The direction length is set to 75 mm on the vehicle body center side. Even if the length of the airflow receiving surface 13 in the vehicle width direction is set to be smaller than the width of the tire 40, the airflow hitting the airflow receiving surface 13 from the vehicle body center side end 131 and the vehicle body side end 132 to the vehicle center side and Since it swells to the side of the vehicle body and flows toward the rear of the vehicle body like a horseshoe shape, it flows away from the front surface 41 of the tire and flows around the side surface of the tire 40.
Therefore, it is desirable that the airflow receiving surface 13 is facing the tire 40, that is, the width of the tire 40 is the same as or larger than the width of the tire 40, but it is not necessarily set to be large.

Further, the airflow receiving surface 13 of the fairing body 11 is formed in a round shape so that the height of the airflow receiving surface 13 is gradually shortened from the vehicle body center side end 131 toward the vehicle body side end 132. This is the one in which the bumper fascia 20 is adapted to a shape that is recessed toward the center of the vehicle body as it goes to the left and right lower surfaces 25, 25, and improves the appearance.
Further, the airflow receiving surface 13 of the fairing body 11 is disposed in the vicinity of about 70 mm from the front surface 41 of the tire 40 at the vehicle body center side end 131 closest to the front surface of the tire 40, but in a range of 50 mm to 110 mm. But it ’s okay.

  The mounting surface 12 is provided with a mounting hole 121 through which a screw 261 for fixing the fairing body 11 to the bumper facer-side lower surface portion 26 is inserted, and when the fairing body 11 is attached to the bumper facer-side lower surface portion 26. A temporary fixing hole 122 for positioning and temporarily holding the fairing body 11 provided for improving workability, and a positioning convex portion 112 for positioning the fairing body 11 on the back surface 111 side of the fairing body 11 (FIG. 2).

Further, the bumper facer-side lower surface portion 26 is provided with a temporary fixing protrusion (not shown) corresponding to the temporary fixing hole 122 and a positioning groove (not shown) corresponding to the positioning convex portion 112, respectively. It has been.
The temporary fixing holes 122 and the temporary fixing protrusions are provided in a fitting relationship.

  Further, the protrusion hanging downward from the bumper facer-side lower surface portion 26 is a positioning protrusion 262 that contacts the back surface 111 of the fairing body 11 and supports and positions the back surface 111 of the fairing body 11. (See Figure 3)

  The fairing body 11 can be accurately and easily attached to the lower surface portion 26 on the bumper facer side by the temporary fixing holes, the temporary fixing protrusions, the positioning convex portions, the positioning grooves, and the positioning protrusions.

Next, functions and effects will be described.
An airflow a is generated which flows from the front of the vehicle body toward the front surface of the tire by receiving a cross wind while the vehicle is running, but the airflow receiving surface 13 of the fairing body 11 is substantially orthogonal to the flow of the airflow a from the front of the vehicle body. The airflow a can be efficiently applied to the airflow receiving surface 13, and the airflow b weakened by hitting the airflow receiving surface 13 hits the front surface 41 of the tire 40. Thereby, the lateral force of the tire 40 is weakened, the air resistance of the tire 40 is reduced, and the effect of improving the lateral wind stability is obtained.

Further, in the vehicle traveling in a state where no cross wind is received, an airflow that flows straight from the front of the vehicle body to the front surface 41 of the tire 40 is generated by traveling, but this airflow is also generated on the airflow receiving surface 13. Airflow can be applied, and the airflow weakened by hitting the airflow receiving surface 13 hits the front surface 41 of the tire 40.
Thereby, the effect that the air resistance of the tire 40 is reduced and the running stability is improved is obtained.

  Further, the fairing body 11 is arranged so that the vehicle body center side end 131 of the airflow receiving surface 13 is inclined in plan view so as to be closer to the tire 40 than the vehicle body side end 132 of the airflow receiving surface 13. With the configuration, the airflow receiving surface 13 of the fairing body 11 is directed in a direction in which the airflow flowing toward the front surface 41 of the tire 40 is more widely applied to the flow of the airflow a from the front of the vehicle body. The airflow flowing toward the front surface 41 of the tire 40 in a wider range can be efficiently applied to the receiving surface 13. Thereby, the lateral force of the tire 40 can be further weakened, the air resistance of the tire 40 can be further reduced, and the effect of improving the cross wind stability can be obtained.

First, the configuration of the second embodiment will be described.
FIG. 5 shows a front bumper fascia provided at the front end of a vehicle to which the tire fairing device of the second embodiment is applied, and is an overall perspective view seen from the front obliquely lower side of the vehicle body with a longitudinal section drawn in the center. FIG. 6 and FIG. 6 are diagrams for explaining the operation of the tire fairing device of the second embodiment.

As shown in FIGS. 5 and 6, the tire fairing device 50 of the second embodiment is such that the left and right lower surfaces 25, 25 of the left and right side ends 24, 24 of the front bumper facer 20 are rearward of the bumper facer 20. The left and right bumper facer side lower surface portions 26, 26 extending to the front end portion of the wheel house (not shown) are attached with fixing tools such as screws (not shown).
A bumper facer main lower surface portion 23 is formed on the central lower surface 22 of the bumper facer 20 so as to extend rearward of the vehicle body, and is integrated with a rear end portion 27 of the main body lower surface portion 23. A chin spoiler 30 is formed on the surface.

An under cover 60 is provided on the rear side of the chin spoiler 30 in the form of a flat plate and covers the front lower portion of the engine room and extends rearward of the vehicle body.
A lip spoiler 70 is provided at the rear end 61 of the under cover 60 so as to integrally project downward from the rear end 61 of the under cover 60 and receive an air flow c flowing toward the rear of the vehicle body on the lower surface of the vehicle body.
The lip spoiler 70 is disposed between the left and right fairing bodies 11, 11 provided in front of the left and right tires 40, 40, extends in the vehicle body width direction, and hangs down in a long plate shape. So as to project downward.

The lip spoiler 70 suppresses the inflow of air below the vehicle body during high-speed traveling and reduces the generation of lift.
Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

In the tire fairing device of the second embodiment, the lip spoiler 70 is disposed between the left and right fairing bodies 11, 11 provided in front of the left and right tires 40, 40 and extends in the vehicle body width direction. In addition, since it has a long plate shape and protrudes downward so as to hang down, it can receive an airflow c flowing toward the rear of the vehicle body between the left and right tires 40, 40. The airflow d in a state where c is weakened can be applied to the inner side surface 42 of the tire 40.
Thereby, in addition to the effect of Example 1, the lateral force of the tire 40 is further weakened, the air resistance of the tire 40 is reduced, and the lateral wind stability can be further improved.

  4 and 6, the arrows indicated by the symbols Y1, Y2, Y3, and Y4 indicate the magnitude of the lateral force of the tire sensuously, and the magnitudes of Y1 and Y2, Y3 and Y4 As shown in the figure, for the airflow from the left front, the right fairing body is more orthogonal to the airflow than the left fairing body, so the right tire has less lateral force than the left tire. It shows that.

  The tire fairing device according to the present invention has been described based on the first and second embodiments. However, the specific configuration is not limited to the first and second embodiments, and the claims are not limited thereto. Design changes and additions are permitted without departing from the spirit of the invention according to each claim of the scope.

  In the first embodiment and the second embodiment, the fairing body 11 is attached to the bumper facer-side lower surface portion 26. However, for example, the fairing body 11 is a vehicle body part such as the bumper facer-side lower surface portion 26. And may be formed integrally.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view showing a front bumper fascia to which a tire fairing device of Example 1 is applied. It is a perspective view which shows the fairing body of the fairing apparatus of the tire of Example 1. FIG. It is AA sectional drawing of FIG. 1 which shows the fairing body of the fairing apparatus of the tire of Example 1. FIG. FIG. 3 is an operation explanatory diagram of the tire fairing device according to the first embodiment. It is a whole perspective view which shows the front bumper fascia to which the fairing apparatus of the tire of Example 2 was applied. FIG. 6 is an operation explanatory diagram of a tire fairing device according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fairing apparatus 11 Fairing body 12 Mounting surface 13 Air flow receiving surface 20 Bumper fascia 22 Center lower surface 23 Bumper fascia main lower surface 24, 24 Left right end 25, 25 Left and right lower surface 26, 26 Bumper facer side lower surface 27 Rear end portion 30 Chin spoiler 40 Tire 41 Front surface 50 Tire fairing device 60 Under cover 61 Rear end portion 70 Lip spoiler 131 Car body center side end 132 Vehicle body side side end LA Virtual parallel lines a, b, c, d Airflow θ angle LC center line
Y1, Y2, Y3, Y4 Lateral force

Claims (2)

A tire fairing device having a pair of left and right fairing bodies, which is provided in front of the vehicle body rather than the tire and guides the airflow around the tire flowing toward the tire on the lower surface of the vehicle body,
The fairing body has an airflow receiving surface that receives an airflow flowing toward the tire on the lower surface of the vehicle body,
The airflow receiving surface is inclined with an angle with respect to the vehicle body width direction so that the vehicle body center side end of the airflow receiving surface is closer to the tire than the vehicle side side end of the airflow receiving surface, A tire fairing device, which is provided close to a front surface and facing the front surface. In the tire fairing device according to claim 1,
A lip spoiler is provided between the fairing bodies and extends in the width direction of the vehicle body and protrudes downward from the vehicle body so as to hang down in a long plate shape, and receives an airflow flowing toward the rear of the vehicle body. Tire fairing equipment.

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