JP5861320B2 - Vehicle rear structure - Google Patents

Description

  The present invention relates to a vehicle rear structure.

  Patent Document 1 below discloses a structure that includes a passage portion formed by a rear bumper and a quarter panel and discharges air in the rear wheel house toward the rear portion of the rear bumper through the passage portion. With this structure, the air resistance is reduced by discharging the air in the rear wheel house toward the rear bumper of the vehicle.

Japanese Patent Laid-Open No. 7-25369

  In Patent Document 1, even if the passage portion is formed by the rear bumper and the quarter panel, if the shape of the entrance of the passage portion is not set appropriately, the inflow of air is inhibited and the effect of reducing the air resistance is impaired. there is a possibility.

  An object of the present invention is to obtain a vehicle rear structure that allows the air in the rear wheel house to smoothly flow into the air passage portion in consideration of the above facts.

The vehicle rear structure according to the invention of claim 1 is provided inside the rear bumper cover and on the vehicle rear side of the rear wheel house where the rear tire is disposed, and an inflow in which air in the rear wheel house flows into a front end portion. An air passage portion that has an opening, allows air in the rear wheel house to flow into the inflow opening, and discharges the vehicle from a discharge opening provided in a rear region of the rear bumper cover; and a front end portion of the air passage portion. The rear tire is provided and is formed to have an upward slope toward the vehicle rear side at an upper part connected to the inflow opening in a side view of the vehicle, and an inclination angle θ2 with respect to the road surface of the upper part passes through a lower end of the inflow opening. The planar upper wall portion configured to have an angle θ1 or more between the tangent to the road surface and the front end portion of the air passage portion, and the inflow opening in the vehicle side view Toward the vehicle rear side to the lower lead to have a, a lower wall portion formed planar so that the upward slope, when the inclination angle of the lower wall portion with respect to the road surface and .theta.3, the .theta.3 <.theta.1 It is set .

According to the first aspect of the present invention, the air passage portion is provided inside the rear bumper cover and on the vehicle rear side of the rear wheel house, and the air in the rear wheel house is formed at the front end portion of the air passage portion. By flowing into the inflow opening, the air passes through the air passage portion and is discharged to the rear of the vehicle from the discharge opening provided in the rear area of the rear bumper cover. A planar upper wall portion is formed at the front end portion of the air passage portion so as to have an upward slope toward the vehicle rear side at an upper portion connected to the inflow opening in a side view of the vehicle. In addition, a planar lower wall portion is formed at the front end portion of the air passage portion so as to have an upward slope toward the vehicle rear side at a lower portion connected to the inflow opening in a side view of the vehicle. At that time, the inclination angle θ2 of the upper wall portion with respect to the road surface is configured to be equal to or larger than the angle θ1 between the tangent line of the rear tire passing through the lower end of the inflow opening and the road surface. Further, when the inclination angle of the lower wall portion with respect to the road surface is θ3, θ3 <θ1 is set. Thereby, the air that flows upward by the rear tire in the rear wheel house is less likely to hit the upper wall portion, and the air that flows upward can be smoothly introduced into the air passage portion from the inflow opening.

  According to the vehicle rear portion structure relating to the present invention, the air in the rear wheel house can smoothly flow into the air passage portion.

1 is a perspective view showing a vehicle to which a vehicle rear structure according to a first embodiment is applied. 1 is a side view showing a rear portion of a vehicle to which a vehicle rear structure according to a first embodiment is applied. FIG. 3 is a perspective view showing a configuration in the vicinity of a rear outlet inside a rear bumper cover used in the vehicle rear structure shown in FIG. 2. It is sectional drawing which shows the rear outlet used for the vehicle rear part structure shown in FIG. It is a side view which shows the flow of the wind received at the time of driving | running | working of a vehicle. It is a side view which shows the flow of the wind in the rear outlet of the vehicle shown in FIG. It is a side view which shows the rear outlet vicinity of the rear part of the vehicle to which the vehicle rear part structure which concerns on 2nd Embodiment was applied. It is a side view which shows the rear outlet vicinity of the rear part of the vehicle to which the vehicle rear part structure which concerns on 3rd Embodiment was applied. It is sectional drawing which shows the rear outlet used for the vehicle rear part structure shown in FIG.

  Hereinafter, a first embodiment of a vehicle rear structure according to the present invention will be described with reference to FIGS. Note that an arrow RR appropriately shown in these drawings indicates the vehicle rear side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a perspective view of a vehicle to which the vehicle rear portion structure according to the present embodiment is applied. 2 shows a rear view of a vehicle to which the vehicle rear structure according to the present embodiment is applied, and FIG. 3 shows a perspective view of the configuration of the vehicle rear structure according to the present embodiment. It is shown. As shown in these drawings, a rear bumper cover 12 made of resin is attached to the rear portion 11 of the vehicle 10 at the rear end portion on the vehicle lower side. The rear bumper cover 12 includes a rear surface portion 12A (see FIG. 2) disposed at the rear end portion of the vehicle 10 along the vehicle width direction, and a side surface portion 12B extending from the vehicle width direction both ends of the rear surface portion 12A to the vehicle front side. It is equipped with. A rear combination lamp 22 is attached to the rear portion 11 of the vehicle 10 above the position where the rear surface portion 12A and the side surface portion 12B of the rear bumper cover 12 intersect. 1 to 3, only the side surface portion 12B of the rear bumper cover 12 on one side of the vehicle 10 is illustrated, and the other side portion of the vehicle 10 is left-right symmetric and is not illustrated.

  The rear portion 11 of the vehicle 10 is provided with a rear wheel house 16 for storing the rear tire 14 on the vehicle front side of the side surface portion 12B of the rear bumper cover 12. A fender liner 18 is provided at a position facing the rear tire 14 at the front end of the side surface portion 12B of the rear bumper cover 12. The fender liner 18 is formed to curve in the vehicle vertical direction and the vehicle width direction along the peripheral surface of the rear tire 14.

  A rear outlet (duct) 20 as an example of an air passage portion is provided on the inner side in the vehicle width direction of the side surface portion 12B of the rear bumper cover 12 along the vehicle front-rear direction. The rear outlet 20 is provided on both sides of the rear portion of the vehicle 10. The rear outlet 20 is disposed between the side surface portion 12B of the rear bumper cover 12 and the vehicle main body on the inner side in the vehicle width direction, and is fixed to the vehicle main body with a fixture (not shown). The rear outlet 20 is disposed on the vehicle rear side of the rear wheel house 16. The rear outlets 20 on both sides of the rear part of the vehicle 10 are formed symmetrically.

  As shown in FIGS. 2 to 4, the rear outlet 20 is formed of a cylindrical body, and a cross section along the vehicle width direction is formed in a rectangular shape that is long in the vehicle vertical direction. An inflow opening 30 through which the air in the rear wheel house 16 flows is formed at the front end of the rear outlet 20, and the air that has passed through the rear outlet 20 is discharged at the rear end of the rear outlet 20. A discharge opening 32 is formed.

  More specifically, the rear outlet 20 has a pair of left and right side walls 20A that form the side surfaces of the passage portion 21 through which air flows, an upper wall 20B that forms the upper surface of the passage portion 21, and a lower surface that forms the lower surface of the passage portion 21. And a wall 20C. At the front end portion of the upper wall 20B of the rear outlet 20, an upper wall portion 34 that is inclined from the inflow opening 30 toward the rear side of the passage portion 21 so as to rise upward is provided. A lower wall portion 36 is provided at the front end portion of the lower wall 20C of the rear outlet 20 so as to be inclined upward from the inflow opening 30 toward the rear side of the passage portion 21 (see FIG. 4 and the like). That is, the inflow opening 30 is connected to the upper wall portion 34 and the lower wall portion 36, respectively.

As shown in FIGS. 2 and 4, the rear outlet 20 has a tangent line 40 to the rear tire 14 that passes through the lower end 36 </ b> A of the inflow opening 30 (the front end of the lower wall portion 36) and the road surface (including the ground) in the vehicle side view. Θ1 is θ1, and the angle between the upper wall portion 34 of the front end portion of the inflow opening 30 and the road surface 50 (inclination angle of the upper wall portion 34 with respect to the road surface 50) is θ2, so that θ1 ≦ θ2. Is set. At this time, when the angle between the lower wall portion 36 of the front end portion of the inflow opening 30 and the road surface 50 (inclination angle of the lower wall portion 36 with respect to the road surface 50) is θ3 in the vehicle side view, in this embodiment, θ3 < θ1 and θ3 <θ2 are set . The basis for the relationship of θ1 ≦ θ2 will be described later.

  As shown in FIGS. 2 and 3, the fender liner 18 is provided with an opening having substantially the same shape as the inflow opening 30 of the rear outlet 20, and the inflow opening 30 of the rear outlet 20 is the opening of the fender liner 18. It is connected. An opening having substantially the same shape as the discharge opening 32 of the rear outlet 20 is provided in the rear surface portion 12A of the rear bumper cover 12, and the discharge opening 32 of the rear outlet 20 is connected to the opening of the rear surface portion 12A (FIG. 2). reference). That is, the inflow opening 30 of the rear outlet 20 communicates with the rear wheel house 16 through the opening of the fender liner 18. Further, the discharge opening 32 of the rear outlet 20 communicates with the outside of the rear portion 11 of the vehicle 10 through the opening of the rear surface portion 12 </ b> A of the rear bumper cover 12. As a result, the air in the rear wheel house 16 flows into the rear outlet 20 (passage portion 21) from the inflow opening 30, and the air passes through the rear outlet 20 (passage portion 21) from the discharge opening 32 to the rear bumper cover 12. It is discharged toward the rear side of the rear surface portion 12A.

  In the present embodiment, the fender liner 18 is provided with an opening that communicates with the inflow opening 30 of the rear outlet 20, but instead of the fender liner 18, an opening that communicates with the inflow opening 30 of the rear outlet 20 is provided in the bumper seal. The structure provided may be sufficient.

As shown in FIG. 5, when the vehicle 10 travels, it receives a wind flow (arrow B direction) from the front side of the vehicle 10 with respect to the traveling direction (arrow A direction) of the vehicle 10. As shown in FIG. 6, on the front side of the rear tire 14 near the rear wheel house 16, a wind flow u ₁ accompanying the traveling of the vehicle 10 is generated toward the rear side of the vehicle 10. Further, since the rear tire 14 rotates in the direction of arrow C, a wind flow u ₄ around the rear tire 14 is generated as the rear tire 14 rotates.

For this reason, a downward flow u ₂ is generated along the rear tire 14 on the upper rear side of the rear tire 14 in the rear wheel house 16. At this time, the downward flow u ₂ is a value obtained by subtracting the wind flow u ₄ around the rear tire 14 from the wind flow u ₁ associated with traveling (u ₂ = u ₁ −u ₄ ). Furthermore, an upward flow u ₃ is generated along the rear tire 14 on the lower rear side of the rear tire 14 in the rear wheel house 16. At this time, the upward flow u ₃ is a value obtained by adding the wind flow u ₁ associated with traveling and the wind flow u ₄ around the rear tire 14 (u ₃ = u ₁ + u ₄ ). For this reason, the upward flow u ₃ becomes larger than the downward flow u ₂ (the relation of u ₃ > u ₂ is satisfied). Accordingly, the flow of the wind flowing into the rear outlet 20 is mainly an upward flow.

  Therefore, as shown in FIGS. 2 and 4, the inclination angle θ <b> 2 with respect to the road surface 50 of the upper wall portion 34 of the front end portion of the inflow opening 30, the tangent line 40 and the road surface 50 of the rear tire 14 passing through the lower end 36 </ b> A of the inflow opening 30. Is set so as to satisfy the relationship of θ1 ≦ θ2, so that the upward flow in the rear wheel house 16 is less likely to hit the upper wall portion 34 and easily flows into the inflow opening 30 of the rear outlet 20. Become. As a result, the air flowing upward on the rear side of the rear tire 14 flows smoothly into the inflow opening 30 of the rear outlet 20.

  Next, the operation and effect of this embodiment will be described.

  A cylindrical rear outlet 20 is provided on the inner side in the vehicle width direction of the side surface portion 12B of the rear bumper cover 12 along the vehicle front-rear direction. The inflow opening 30 at the front end of the rear outlet 20 is the opening of the fender liner 18. The exhaust outlet 32 of the rear outlet 20 is communicated with the opening of the rear surface portion 12 </ b> A of the rear bumper cover 12. As a result, the air in the rear wheel house 16 flows into the rear outlet 20 (passage portion 21) from the inflow opening 30, and further the air passes through the rear outlet 20 (passage portion 21) from the discharge opening 32 to the rear bumper cover 12. It is discharged to the rear side (external side) of the rear surface portion 12A.

  Generally, if the air in the rear wheel house 16 does not flow efficiently into the rear outlet, the rectifying effect that is the main effect of the rear outlet cannot be fully exhibited, and the effect of improving aerodynamic performance is reduced. Resulting in. As a result, the degree of contribution to fuel consumption also decreases.

  For example, when the inflow opening of the rear outlet and the upper surface of the front end are set without considering the wind flow around the rear tire 14 in the rear wheel house 16, the air flow in the rear wheel house 16 can be efficiently taken into the rear outlet. There is no possibility. That is, due to factors such as the wind flow in the rear wheel house 16 striking the upper surface of the front end of the rear outlet, the air does not flow efficiently into the rear outlet, and air stagnates in the rear wheel house 16 or air flows outside the vehicle. May flow out and disturb the flow around the vehicle.

On the other hand, in the vehicle rear portion structure of the present embodiment, as shown in FIGS. 2 and 4, the rear outlet 20 has the upper wall portion 34 and the road surface 50 of the front end portion of the inflow opening 30 in a vehicle side view. (The inclination angle of the upper wall portion 34 with respect to the road surface 50) θ2 is set to be equal to or larger than the angle θ1 between the tangent line 40 of the rear tire 14 passing through the lower end 36A of the inflow opening 30 and the road surface 50 (θ1 ≦ It is set to have a relation of θ2. As shown in FIG. 6, on the rear side of the rear tire 14 in the rear wheel house 16, the upward flow u ₃ becomes larger than the downward flow u ₂ (the relation of u ₃ > u ₂ ), and the rear outlet 20 The incoming wind flow is mainly upward. For this reason, by setting so that the relationship of θ1 ≦ θ2 is satisfied, the upward flow of the rear side of the rear tire 14 in the rear wheel house 16 hardly hits the upper wall portion 34 and flows into the inflow opening 30 of the rear outlet 20. It becomes easy to do. Therefore, the air that flows upward in the rear wheel house 16 can smoothly flow into the inflow opening 30 of the rear outlet 20. Thereby, the aerodynamic performance can be improved by improving the rectification effect, and as a result, the fuel consumption can be improved.

  Next, a second embodiment of the vehicle rear portion structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 7, a rear outlet 60 as an example of an air passage portion used in the vehicle rear portion structure of the present embodiment is formed of a cylindrical body, and a rear side of the passage portion 21 is provided at a lower portion of the rear outlet 60. A lower wall 62 is provided so as to be inclined upward. Furthermore, the front end portion of the lower wall 62 of the rear outlet 60 has an upward slope from the inflow opening 30 toward the rear side of the passage portion 21 and has an inclination angle larger than the inclination angle of the lower wall 62 with respect to the road surface 50. The lower wall part 36 formed in this way is provided.

The rear outlet 60 has an angle between the tangent line 40 of the rear tire 14 passing through the lower end 64 </ b> A of the inflow opening 30 and the road surface 50 as θ <b> 1 in a side view of the vehicle. When the angle (inclination angle of the upper wall portion 34 with respect to the road surface 50) is θ2, it is set to satisfy θ1 ≦ θ2. In addition, when the angle between the lower wall portion 64 of the front end portion of the inflow opening 30 and the road surface 50 (inclination angle of the lower wall portion 64 with respect to the road surface 50) is θ3 in the vehicle side view, in this embodiment, θ3 is The angle is smaller than the angle between the lower wall portion 36 of the first embodiment and the road surface 50 (see FIG. 2), and is set such that θ3 <θ1 and θ3 <θ2 .

  Even in such a vehicle rear structure, by setting so as to satisfy the relationship of θ1 ≦ θ2, the upward flow on the rear side of the rear tire 14 in the rear wheel house 16 is difficult to hit the upper wall portion 34, and the rear outlet 60 It becomes easy to flow into the inflow opening 30. Thereby, the air which flows upward in the rear wheel house 16 can be smoothly flowed into the inflow opening 30 of the rear outlet 60, the rectification effect can be improved, and the aerodynamic performance can be improved.

  In this embodiment, the inclination angle of the lower wall 62 with respect to the road surface 50 is set to be smaller than the inclination angle θ3 of the lower wall portion 64 with respect to the road surface 50. However, the lower wall portion 64 and the lower wall 62 have the same inclination. It is good also as an inclined surface which continues to the discharge opening 32 at an angle. Further, the inclination angle of the lower wall 62 with respect to the road surface 50 may be set to be larger than the inclination angle θ3 of the lower wall portion 64 with respect to the road surface 50.

  Next, a third embodiment of the vehicle rear structure according to the present invention will be described with reference to FIGS. 8 and 9. In addition, about the same component as 1st and 2nd embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, the rear outlet 80 as an example of the air passage portion used in the vehicle rear structure of the present embodiment is formed of a cylindrical body, and is formed at the front end portion of the upper wall 20 </ b> B of the rear outlet 80. Has an upward slope from the inflow opening 30 toward the rear side of the passage portion 21, and an upper wall portion 82 that is curved in a recessed shape is formed on the vehicle upper side. In other words, the upper wall portion 82 is a curved surface that is recessed in an R shape on the vehicle upper side. Further, the lower wall of the lower wall 20C of the rear outlet 80 has a curved surface that is inclined upward from the inflow opening 30 toward the rear side of the passage portion 21 and protrudes in an R shape toward the vehicle upper side. A portion 84 is formed.

  In the present embodiment, the angle between the tangent line 86 passing through the upper end 82A of the inflow opening 30 in the upper wall portion (curved surface) 82 (the front end of the upper wall portion 82) and the road surface 50 in the vehicle side view is θ2, and this θ2 The angle θ1 between the tangent line 40 of the rear tire 14 passing through the lower end 84A of the inflow opening 30 and the road surface 50 is set to satisfy θ1 ≦ θ2. At this time, the relationship between θ1 or θ2 and the angle between the tangent line passing through the lower end 84A of the inflow opening 30 in the lower wall portion 84 (the front end of the lower wall portion 84) and the road surface 50 is not defined.

  Even in such a vehicle rear structure, by setting so as to satisfy the relationship of θ1 ≦ θ2, the upward flow of the rear side of the rear tire 14 in the rear wheel house 16 is difficult to hit the upper wall portion 82, and the rear outlet 80 It becomes easy to flow into the inflow opening 30. Thereby, the air which flows upward in the rear wheel house 16 can be smoothly flowed into the inflow opening 30 of the rear outlet 80, the rectification effect can be improved, and aerodynamic performance can be improved.

  In addition, in 1st Embodiment-3rd Embodiment, although the rear outlet in which the cross section along a vehicle width direction was formed in the rectangular shape long in the vehicle up-down direction was provided, the shape of the cylindrical body which comprises a rear outlet is the shape. It can be changed.

Moreover, in 1st Embodiment-3rd Embodiment, although the cylindrical rear outlet was provided along the vehicle front-back direction inside the vehicle width direction of the rear bumper cover 12, it is not limited to this, A rear bumper cover and its vehicle You may form a duct (air passage part) using the inner panel arrange | positioned inside width direction. For example, when the vehicle is viewed from the front, upper and lower plates (resin plates, etc.) are added between the rear bumper cover and the inner panel, and the part surrounded by the rear bumper cover, the inner panel, and the upper and lower plates is a duct (air passage section). It may be configured as follows.
Alternatively, a duct (air passage portion) may be formed with the rear bumper cover and the U-shaped member by overlapping the U-shaped member on the inner side in the vehicle width direction of the rear bumper cover when viewed from the front of the vehicle.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Rear part 12 Rear bumper cover 14 Rear tire 16 Rear wheel house 20 Rear outlet (air passage part)
30 Inflow opening 32 Discharge opening 34 Upper wall part 36A Lower end (lower end of inflow opening)
40 Tangent 50 Road surface 60 Rear outlet (air passage part)
64A Lower end (lower end of inflow opening)
80 Rear outlet (air passage)
82 Upper end of upper wall portion 82A (upper end of inflow opening)
84A Lower end (lower end of inflow opening)
86 Tangent

Claims (1)

Provided inside the rear bumper cover and on the vehicle rear side of the rear wheel house on which the rear tire is disposed, and provided with an inflow opening through which air in the rear wheel house flows into a front end portion, and air in the rear wheel house An air passage portion that flows into the inflow opening and discharges from the discharge opening provided in the rear region of the rear bumper cover to the rear of the vehicle;
Provided at the front end portion of the air passage portion, and is formed so as to have an upward slope toward the vehicle rear side at an upper portion connected to the inflow opening in a vehicle side view, and an inclination angle θ2 with respect to the road surface of the upper portion is A planar upper wall portion configured to have an angle θ1 or more between the tangent line of the rear tire passing through the lower end of the inflow opening and the road surface;
A planar lower wall portion provided at a front end portion of the air passage portion and formed so as to rise upward toward the vehicle rear side at a lower portion connected to the inflow opening in a vehicle side view;
I have a,
A vehicle rear structure in which θ3 <θ1 is set, where θ3 is an inclination angle of the lower wall portion with respect to a road surface .

that's all

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