Vehicle front structure

Abstract

To provide a vehicle front part structure that can suppress whirl generated due to a difference between wind speeds of air at high-speed separating from an outer edge of a deflector and air at low-speed in a front wheel house.SOLUTION: A vehicle front part structure includes a deflector 30 that protrudes, in front of a front wheel house 20, downward from a lower surface of a front bumper face 10. The deflector 30 includes: a wind introduction portion 38 that introduces air into the deflector 30 at a front part of the deflector 30; and a medium-speed wind generation hole portion 39 that communicates with the wind introduction portion 38 to generate a flow of air having a medium speed, which is lower than a wind speed of air separating from deflector outer edge portions 37d and 37e in an area α not opposed to a tire 21 in vehicle front view directly rearward of the deflector 30 and which is higher than a wind speed of air in the front wheel house 20.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a front structure of a vehicle that is provided with a deflector that protrudes downward from a lower surface of a front bumper face in front of a front wheel house. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a vehicle front structure that has a deflector (more specifically, a front tire deflector) that protrudes downward from the underside of the front bumper face in front of the front wheel house for the purpose of improving aerodynamic performance.

[0003] However, when the vehicle is traveling, the high-speed air flow that separates from the outer edge of the deflector attempts to flow into the space inside the front wheel house where the low-pressure, low-speed air flow occurs, generating vortices and reducing aerodynamic performance.

[0004] Incidentally, the following deflector has already been invented in Patent Document 1. That is, this deflector is equipped with an air guide section that opens toward the front of the vehicle and takes in air into the internal space of the deflector when the vehicle is traveling forward, a guide section that directs the air taken into the internal space from the air guide section toward the rear of the vehicle and outward in the vehicle width direction within the internal space, and an outer hole section that opens toward the rear of the vehicle in the area facing the tire and discharges the air in the internal space diagonally outward in the vehicle width direction toward the rear of the vehicle.

[0005] The conventional structure disclosed in Patent Document 1 can prevent high-speed traveling wind that has separated from the outer rear edge of the front bumper face from entering the inside of the front wheel house from the outside of the front wheel house.

[0006] However, with this conventional structure, it was not possible to prevent the high-speed underfloor wind that detaches from the outer edge of the deflector from flowing into the front wheel house from below and inside the vehicle width direction. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-104576 A Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, an object of the present invention is to provide a front structure of a vehicle that can suppress vortexes that occur due to the difference in wind speed between the high-speed air separating from the outer edge of the deflector and the low-speed air inside the front wheel house. [Means for solving the problem]

[0009] The vehicle front structure according to the present invention is a vehicle front structure including a deflector that protrudes downward from a lower surface of a front bumper face in front of a front wheel house, the deflector including, in a front portion of the deflector, an air guide section that introduces air into a space inside the deflector, and a medium-speed wind generating hole section that communicates with the air guide section and generates a flow of air having a medium wind speed that is lower than the wind speed of air separating from an outer edge of the deflector and higher than the wind speed of air inside the front wheel house, in an area immediately behind the deflector that does not face a tire in a front view of the vehicle. The medium speed wind generating hole is formed in a shape along the outer edge of the deflector on the rear surface of the deflector. This is what was done. The above-mentioned outer edge portion of the deflector refers to the bottom surface portion of the deflector and the side surface portion of the deflector on the inner side in the vehicle width direction.

[0010] Further, a vehicle front structure according to the present invention is a vehicle front structure including a deflector that protrudes downward from a lower surface of a front bumper face in front of a front wheel house, the deflector including an air guide section that introduces air into a space inside the deflector at a front portion of the deflector, the air guide section communicating with the air guide section, and a wind speed lower than the wind speed of air separating from an outer edge of the deflector and higher than the wind speed of air inside the front wheel house in an area immediately behind the deflector that does not face a tire in a front view of the vehicle. and a medium speed wind generating hole portion that generates a flow of air having a medium wind speed, the speed of which is higher than that of the deflector. The deflector includes a guide portion that is provided inside the deflector and guides the air introduced from the air guide portion to the medium speed wind generating hole portion, and an outer hole portion that, in a region immediately behind the deflector facing the tire in a front view of the vehicle, obliquely discharges the air introduced from the air guide portion outward in the vehicle width direction toward the rear of the vehicle. The front end of the guide portion is located behind the air guide portion and between an inner end portion and an outer end portion in the vehicle width direction. It is something.

[0011] According to the above configuration, a flow of air having a medium wind speed (medium-speed wind) flowing out from the medium-speed wind generating hole portion is generated vertically between the space of the high-speed area of ​​air separating from the deflector outer edge portion and the space of the low-speed area of ​​air inside the front wheel house.

[0012] This reduces the speed difference between the wind speed in the high-speed region and the wind speed in the low-speed region, making it possible to suppress the generation of vortexes, thereby improving energy loss.

[0013] In other words, when the vehicle is traveling, the high-speed air flow that separates from the deflector's outer edge tries to flow from the underside of the vehicle and the inside in the vehicle width direction into the space of low-pressure, low-speed air flow inside the front wheel house, and the medium-speed wind can suppress the generation of vortices.

[0014] Also , As mentioned above, The medium speed wind generating hole is formed in a shape that follows the outer edge of the deflector on the rear surface of the deflector. So, Since the medium-speed wind generating holes are located along the outer edge of the deflector rear surface, the medium-speed wind is formed along the outer edge of the deflector, thereby efficiently suppressing the high-speed airflow separating from the outer edge from flowing into the space inside the front wheel house by the medium-speed wind.

[0015] As described above, the deflector is provided with a guide section that is provided inside the deflector and guides the air introduced from the air guide section to the medium speed wind generating hole section, and an outer hole section that discharges the air introduced from the air guide section diagonally outward in the vehicle width direction toward the rear of the vehicle in a region facing the tire when viewed from the front of the vehicle immediately behind the deflector, and the front end of the guide section is located rearward of the air guide section and between the inner end and the outer end in the vehicle width direction.

[0016] According to the above configuration, the air introduced from the air guidance section can be divided by the guide section into a flow directed toward the medium-speed wind generating hole section and a flow directed toward the outer hole section. The air discharged obliquely from the outer hole toward the outside in the vehicle width direction flows toward the outside in the vehicle width direction of the tire, thereby making it possible to prevent wind separated from the outer rear edge of the front bumper face from being drawn into the front wheel house from the outside of the front wheel house.

[0017] In short, it is possible to prevent high-speed underfloor running wind that has detached from the deflector outer edge from flowing into the front wheel house from below and from the inside in the vehicle width direction, and it is also possible to prevent vehicle body side wind that has detached from the outer rear edge of the front bumper face from flowing into the front wheel house from the outside in the vehicle width direction.

[0018] In one embodiment of the present invention, the rear surface of the deflector is approximately rectangular when viewed from the rear of the vehicle, and the medium-speed wind generating hole portion is formed in an L-shape that includes a corner portion on the inner lower part of the rear surface in the vehicle width direction. According to the above-mentioned configuration, it is possible to generate an air flow having a medium wind speed, even with a simple configuration. 。

[0019] child In one embodiment of the invention, the guide portion extends in the vehicle front-rear direction and has a rear end located between the outer hole portion and the medium-speed wind generating hole portion in the vehicle width direction. According to the above-mentioned configuration, the air flow inside the deflector can be straightened, and the wind introduced from the wind guidance section can be reliably guided to the outer hole section and the medium-speed wind generating hole section. Effect of the Invention

[0020] According to this invention, it is possible to suppress vortices that are generated due to the difference in wind speed between the high-speed air separating from the outer edge of the deflector and the low-speed air inside the front wheel house. [Brief description of the drawings]

[0021] [Figure 1] 1 is a bottom perspective view of a vehicle equipped with a front structure of the present invention; [Diagram 2] Front view of Figure 1. [Diagram 3] Bottom view of Fig. 1. [Figure 4] FIG. 4 is a rear view showing the main parts on the right side of the vehicle as viewed from the rear of the vehicle. [Diagram 5] FIG. [Figure 6] A cross-sectional view taken along line A-A in Figure 5. [Figure 7] FIG. 4 is a perspective view showing the deflector as viewed from above and in front of the vehicle. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 13 is an explanatory diagram for explaining the effect of air flow having a medium wind speed. [Figure 11] 11 is an explanatory diagram for explaining the effect of a flow of air discharged obliquely outward in the vehicle width direction; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] A vehicle front structure having a deflector protruding downward from a lower surface of a front bumper face in front of a front wheel house for the purpose of suppressing vortices generated due to a wind speed difference between high-speed air separating from an outer edge of the deflector and low-speed air in a front wheel house, the deflector having an air guide section in front of the deflector that introduces air into a space inside the deflector, and a medium-speed wind generating hole section that communicates with the air guide section and generates a flow of air having a medium wind speed that is lower than the wind speed of the air separating from the outer edge of the deflector and higher than the wind speed of the air in the front wheel house, in an area immediately behind the deflector that does not face a tire in a front view of the vehicle. The medium speed wind generating hole is formed in a shape along the outer edge of the deflector on the rear surface of the deflector. This was achieved through the above configuration. EXAMPLES

[0023] An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The drawings show the front structure of a vehicle, with Fig. 1 being a bottom perspective view of a vehicle equipped with the front structure as viewed from below, Fig. 2 being a front view of Fig. 1, Fig. 3 being a bottom view of Fig. 1, and Fig. 4 being a rear view showing the main parts of the right side of the vehicle as viewed from the rear of the vehicle.

[0024] In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow OUT indicates the outward direction in the vehicle width direction, arrow IN indicates the inward direction in the vehicle width direction, and arrow UP indicates the upward direction of the vehicle.

[0025] The upper part of the engine room located at the front of the vehicle is covered by a bonnet that can be opened and closed, the left and right sides of the engine room are covered by a pair of left and right front fender panels, and the front of the engine room is covered by a front bumper face 10 shown in Figures 1 to 4.

[0026] As shown in FIG. 2, the above-mentioned front bumper face 10 has a front bumper face upper portion 11, a front bumper face middle portion 12, and a front bumper face lower portion 13, and a front grille 14 is disposed between the front bumper face upper portion 11 and the front bumper face middle portion 12.

[0027] As shown in FIG. 3, the above-mentioned front bumper face 10 is bent in a curved shape on both the left and right sides in the vehicle width direction toward the rear and inward in the vehicle width direction, and at this bent portion 10a, as shown in FIGS. 1 and 2, a recess 11a recessed upward is formed in the front bumper face upper portion 11, and a recess 12a recessed downward is formed in the front bumper face middle portion 12.

[0028] A headlamp arrangement space 15 is formed by these upper and lower recesses 11a, 12a (see FIG. 2). As shown in FIG. 2, a running wind intake 16 is formed in the front portion of the front bumper face 10 between the front bumper face intermediate portion 12 and the front bumper face lower portion 13 described above.

[0029] Furthermore, as shown in Figs. 1 and 2, a license plate 17 is attached to the boundary between the front bumper face intermediate portion 12 and the front bumper face lower portion 13, at the front center in the vehicle width direction.

[0030] Furthermore, as shown in FIG. 1, an over fender 18 is attached across the vehicle width direction outer end of the front wheel house 20 of the front fender panel and the bent ends of the front bumper face middle portion 12 and the front bumper face lower portion 13.

[0031] 1 and 3, a mudguard 19 is provided on the outer surface of the front wheel house 20 facing the tire 21. The tire 21 constitutes a front wheel.

[0032] 3, a subframe 22 serving as a suspension cross member is provided below the engine compartment. The subframe 22 is reinforced by gussets 23, and lower arms 24 serving as suspension arms for suspending front wheels (see tires 21) in cooperation with upper arms (not shown) are provided on both sides of the subframe 22 in the vehicle width direction.

[0033] 1 and 3, an undercover 25 that covers the lower part of the engine compartment is provided between the left and right front wheel houses 20, 20. This undercover 25 is divided into a front undercover 26 and a rear undercover 27, and these two undercovers 26, 27 cover the area between the lower surface of the front bumper face lower part 13 and the subframe 22 in the front-to-rear direction of the vehicle.

[0034] As shown in Figures 1 and 3, the above-mentioned front bumper face 10 is located forward of the front wheel house 20 on the vehicle, and is provided with a pair of left and right deflectors 30 that protrude downward beyond the front bumper face lower part 13 of the front bumper face 10 in front of the front wheel house 20.

[0035] Fig. 5 is a bottom view of the deflector 30, Fig. 6 is a cross-sectional view taken along line A-A in Fig. 5, Fig. 7 is a perspective view of the deflector 30 as viewed from the front and above of the vehicle, Fig. 8 is a plan view of the deflector 30, and Fig. 9 is a rear view of the deflector 30. Fig. 10 is an explanatory diagram for explaining the action of an air flow having a medium wind speed, and Fig. 11 is an explanatory diagram for explaining the action of an air flow discharged obliquely outward in the vehicle width direction.

[0036] In this embodiment, as shown in the bottom view of FIG. 3, the above-mentioned deflectors 30 are provided in pair on the left and right between the rear side of the bent portion of the front bumper face lower portion 13, the front side of the tire 21, and the lateral side of the under-cover 25 in the vehicle width direction, and these left and right deflectors 30, 30 are formed symmetrically or approximately symmetrically.

[0037] As shown in Fig. 6, the above-mentioned deflector 30 is formed of a deflector body 31 as a lower member, and an upper member 32 that covers the upper opening of the deflector body 31. Figs. 5, 6 and 9 show both the deflector body 31 and the upper member 32, while Figs. 7 and 8 show only the deflector body 31.

[0038] As shown in Figures 7 and 8, the deflector body 31 comprises a bottom wall 33, an inner flange portion 35 connected to the inside of the bottom wall 33 in the vehicle width direction via a vertical wall 34, a front outer flange portion 36 provided on the front side or outside of the bottom wall 33 in the vehicle width direction, and a rear wall 37 located at the rear end of the bottom wall 33, and is formed in an approximately triangular shape when viewed from above the vehicle.

[0039] 6, the bottom wall 33 includes a front inclined portion 33a that slopes downward at a gentle gradient of about 6 degrees toward the rear of the vehicle relative to the main surface portion 32a of the upper member 32, an inner inclined portion 33b that slopes downward at a gradient of about 22 degrees toward the rear of the vehicle relative to the main surface portion 32a, and an outer inclined portion 33c that slopes downward at a steep gradient of about 52 degrees toward the rear of the vehicle relative to the main surface portion 32a. Note that the angles indicating the degree of inclination of each of the above gradients are not limited to the above numerical values.

[0040] As shown in FIG. 9, the rear wall 37 includes an inner rear wall portion 37b having a relatively small vertical dimension corresponding to the inner inclined portion 33b, and an outer rear wall portion 37c having a relatively large vertical dimension corresponding to the outer inclined portion 33c.

[0041] On the other hand, the upper member 32 includes a main surface portion 32a that entirely closes the upper opening of the deflector body 31, a rear wall portion 32b that rises upward from the rear end of the main surface portion 32a, and a front outer flange portion 32c that is integrally provided on the front side or outer side in the vehicle width direction of the main surface portion 32a as shown in Figure 6. Here, the main surface portion 32a extends in a substantially horizontal direction.

[0042] As indicated by the dotted line in FIG. 5, the upper member 32 is provided with an inner flange portion 32d extending in the front-rear direction of the vehicle on the inner side in the vehicle width direction of the main surface portion 32a. Then, the inner flange portion 35 of the deflector body 31 is abutted and fixed to the inner flange portion 32d of the upper member 32, the front outer flange portion 36 of the deflector body 31 is abutted and fixed to a predetermined portion of the main surface portion 32a (the front outer portion of the main surface portion 32a) that is along the front outer flange portion 32c of the upper member 32, and the upper portion of the rear wall 37 of the deflector body 31 is abutted and fixed to the back surface of the rear wall portion 32b of the upper member 32, thereby configuring the deflector 30 to have a hollow shape (see Figures 5 and 6).

[0043] As shown in FIGS. 6 and 7, the above-mentioned deflector 30 is provided with an air guide section 38 for introducing air into the space inside the deflector 30 at the front portion of the deflector 30. As shown in FIG. In detail, an air guide section 38 that guides the underfloor traveling wind into the internal space of the deflector 30 is formed in the front part of the front inclined portion 33a immediately behind the front outer flange portion 36 of the deflector body 31, and this air guide section 38 opens toward the front-downward direction of the vehicle, and is formed in an elongated shape along the front outer flange portion 36.

[0044] Moreover, as shown in Figures 6, 7 and 9, the deflector 30 is connected to the air guide section 38 and has a medium-speed wind generating hole section 39 that generates an air flow having a medium wind speed (medium-speed wind a1, see Figure 10).

[0045] Specifically, the medium speed wind generating hole 39 is formed as an opening in the inner rear wall portion 37b of the rear wall 37 of the deflector body 31 in a region α immediately behind the deflector 30 and not facing the tire 21 in a front view of the vehicle.

[0046] This medium-speed wind generating hole 39 is a hole that generates an air flow (medium-speed wind a1) having a medium wind speed that is slower than the wind speed of the air (high-speed detached wind a2, see Figure 10) detached from the deflector bottom surface portion 37d (see Figure 9) as the outer edge portion of the deflector 30 and the side surface portion 37e (see Figure 9) on the inner side of the deflector in the vehicle width direction, but faster than the wind speed of the air inside the front wheel house 20.

[0047] As a result, a flow of air having a medium wind speed (medium-speed wind a1) flowing out from the medium-speed wind generating hole 39 is generated vertically between the space of the high-speed region of the air (high-speed detached wind a2) detaching from the bottom surface 37d and side surface 37e, which serve as the deflector outer edge portions, and the space of the low-speed region of the air inside the front wheel house 20, as shown in Figure 10.

[0048] As a result, the speed difference between the wind speed in the high-speed region (the wind speed of the high-speed separation wind a2) and the wind speed in the low-speed region within the front wheel house 20 becomes smaller, improving energy loss and suppressing the generation of vortices.

[0049] In other words, when the vehicle is traveling, the high-speed air (high-speed detached air a2) that has detached from the outer edge of the deflector 30 described above attempts to flow from the underside of the vehicle and the inside in the vehicle width direction into the space of low-pressure, low-speed air flow inside the front wheel house 20, and this is suppressed by the medium-speed air a1, thereby suppressing the generation of vortices.

[0050] In the absence of the medium-speed air generating holes 39, the speed difference between the high-speed air flow that separates from the deflector outer edge and the low-speed air flow with low pressure inside the front wheel house, that is, between the wind speed in the high-speed area and the wind speed in the low-speed area, becomes large. This large speed difference causes a large energy loss on the inner side of the tire in the vehicle width direction behind the deflector, which results in the generation of vortices and deterioration of aerodynamic performance.

[0051] In contrast to this, in this embodiment, the flow of the high-speed separated wind a2 is suppressed by the medium-speed wind a1 from flowing into the space of the low-speed area inside the front wheel house 20, thereby suppressing the generation of vortices and improving aerodynamic performance.

[0052] As shown in FIG. 9, the medium-speed wind generating holes 39 are formed in the rear surface of the deflector 30 in a shape that follows the outer edge of the deflector 30 . More specifically, the medium speed wind generating holes 39 are formed in an inner rear wall portion 37b of the rear wall 37 of the deflector body 31 in a shape that conforms to the bottom surface portion 37d and the side surface portion 37e of the outer edge portion of the deflector 30, as shown in FIG.

[0053] In this way, the medium-speed wind generating holes 39 are arranged along the outer edge of the deflector 30 at the rear, and the medium-speed wind a1 is formed along the outer edge of the deflector. This efficiently prevents the high-speed flow (high-speed separated wind a2) separating from the outer edge (bottom surface 37d, side surface 37e) from flowing into the space inside the front wheel house 20.

[0054] Furthermore, as shown in FIG. 9, the rear wall 37 as the rear surface of the deflector 30 is formed in a substantially rectangular shape when viewed from the rear of the vehicle, and the medium-speed wind generating hole 39 is formed in an L-shape including a corner 37f at the inner lower part in the vehicle width direction of the inner rear wall portion 37b of the rear wall 37.

[0055] In this way, by forming the medium-speed wind generating hole portion 39 in an L-shape when viewed from the rear of the vehicle, including the above-mentioned corner portion 37f, a flow of air having a medium wind speed (medium-speed wind a1) can be generated along the deflector outer edge portion including the corner portion 37f, despite the simple configuration, and the high-speed separated wind a2 can be efficiently suppressed from entering the space within the front wheel house 20.

[0056] In detail, the high-speed detached wind a2 detached from the bottom portion 37d at the rear portion of the deflector 30, the high-speed detached wind a2 detached from the side portion 37e, and the high-speed detached wind a2 detached from the corner portion 37f are efficiently suppressed from entering the space within the front wheel house 20 by the medium-speed wind a1 flowing out from the corresponding portion of the medium-speed wind generating hole portion 39.

[0057] As shown in FIGS. 7 and 8, the deflector 30 includes a guide portion 40 provided inside the deflector 30. As shown in FIG. The guide portion 40 is provided so as to protrude upward from the bottom wall 33 of the deflector body 31, and a front end 40a of the guide portion 40 is located behind the air guide portion 38. The front end of the guide portion 40 is located behind the air guide portion 38 and between the vehicle width direction inner end and the vehicle width direction outer end. The rear end 40b of the guide portion 40 is located between the inner rear wall portion 37b and the outer rear wall portion 37c of the rear wall 37 of the deflector body 31, and is abutted and fixed to the rear wall 37. The guide portion 40 guides the air introduced from the air guide portion 38 to the medium-speed wind generating hole portion 39.

[0058] 8, the front end 40a of the guide portion 40 is located inward in the vehicle width direction relative to the rear end 40b. In other words, the rear end 40b of the guide portion 40 is located outward in the vehicle width direction relative to the front end 40a, and the guide portion 40 is formed continuously between the front end 40a and the rear end 40b so as to connect these ends 40a and 40b.

[0059] In addition, the guide portion 40 extends in the vehicle front-rear direction, and its rear end is located between the outer hole portion 45 and the medium-speed wind generating hole portion 39 in the vehicle width direction. This straightens the air flow inside the deflector 30, and ensures that the wind introduced from the air guide portion 38 is guided to the outer hole portion 45 and the medium-speed wind generating hole portion 39.

[0060] Furthermore, as shown in FIG. 7, the above-mentioned guide portion 40 is formed so that the vertical dimension is relatively small on the front end 40a side and relatively large on the rear end 40b side.

[0061] Furthermore, as shown in Figures 6 to 8, a protrusion 40c that protrudes upward is integrally formed at the middle portion in the fore-and-aft direction of the above-mentioned guide portion 40, and as shown in Figure 6, the protrusion 40c extends upward through the main surface portion 32a of the upper member 32 and is configured to be fastened and fixed to the upper member 32.

[0062] 6 to 8, a plurality of ribs 41, 42, 43, and 44 that connect the bottom wall 33 and the guide portion 40 are integrally formed on the bottom wall 33 of the deflector body 31. These ribs 41 to 44 ensure the upright posture of the guide portion 40 and are configured to appropriately set the wind speed of the medium-speed wind a1 (see FIG. 10).

[0063] Furthermore, as shown in Figures 7, 9, and 10, an outer rear wall portion 37c of the deflector body 31 of the deflector 30 is formed with an outer hole portion 45 in an area β facing the tire 21 when viewed from the front of the vehicle immediately behind the deflector, which discharges the air introduced from the above-mentioned air guidance portion 38 obliquely outward in the vehicle width direction toward the rear of the vehicle.

[0064] The deflector 30 is formed in a hollow shape as shown in FIG. 6, and by providing the deflector body 31 with an air guide section 38, a medium-speed wind generating hole section 39, an outer hole section 45, and a guide section 40, inside the deflector 30, as shown in FIG. 7, a first flow passage 46 located inside the guide section 40 in the vehicle width direction, and a second flow passage 47 located outside the guide section 40 in the vehicle width direction are formed.

[0065] The first flow passage 46 is an air flow path that flows the air introduced from the air guide section 38 toward the medium-speed wind generating hole section 39, and the second flow passage 47 is an air flow path that flows the air introduced from the air guide section 38 toward the outer hole section 45.

[0066] By providing the above-mentioned medium-speed wind generating hole 39, outer hole 45, and guide section 40, the air introduced from the air guide section 38 is divided into a flow toward the medium-speed wind generating hole 39 via the first flow passage 46 and a flow toward the outer hole 45 via the second flow passage 47.

[0067] 11, the air (deflected air a3) discharged obliquely outward in the vehicle width direction from the outer hole 45 flows toward the outer side in the vehicle width direction of the tire 21. This is configured to suppress the air (vehicle body side air a4) separated from the outer trailing edge of the front bumper face 10 from being drawn into the front wheel house 20 from the outside of the front wheel house 20.

[0068] In short, this is designed to suppress the high-speed underfloor traveling wind (high-speed detached wind a2) that has detached from the outer edge of the deflector 30 from flowing into the front wheel house 20 from below and inside in the vehicle width direction (see Figure 10), and to suppress the vehicle body side flow a4 that has detached from the outer rear edge of the front bumper face 10 from flowing into the front wheel house 20 from the outside in the vehicle width direction (see Figure 11).

[0069] In other words, the above configuration aims to suppress both the high-speed separated air a2 from flowing into the front wheel house 20 and the vehicle body side air flow a4 from flowing into the front wheel house 20.

[0070] As described above in detail, the vehicle front structure of this embodiment is a vehicle front structure having a deflector 30 that protrudes downward from the underside of the front bumper face 10 in front of the front wheel house 20, and the deflector 30 is provided with an air guide section 38 in front of the deflector 30 that introduces air into the space inside the deflector 30, and a medium-speed wind generating hole section 39 that communicates with the air guide section 38 and generates an air flow (medium-speed wind a1) having a medium wind speed that is slower than the wind speed of the air (high-speed separated wind a2) that separates from the deflector outer edge section (see bottom surface section 37d and side surface section 37e) and faster than the wind speed of the air in the front wheel house 20, in an area α immediately behind the deflector 30 that does not face the tire 21 when viewed from the front of the vehicle (see Figures 1, 7, 9 and 10).

[0071] According to this configuration, a flow of air having a medium wind speed (medium-speed wind a1) flowing out from the medium-speed wind generating hole 39 is generated vertically between the space of the high-speed region of the air (high-speed detached wind a2) detached from the deflector outer edge portion (bottom portion 37d, side portion 37e) and the space of the low-speed region of the air inside the front wheel house 20.

[0072] This reduces the speed difference between the wind speed in the high-speed region and the wind speed in the low-speed region, suppressing the generation of vortices and improving energy loss. In other words, when the vehicle is traveling, the high-speed air flow (high-speed detached wind a2) that detaches from the outer edge portion (bottom portion 37d, side portion 37e) of the deflector 30 attempts to flow from the underside of the vehicle and the inside in the vehicle width direction into the space of low-pressure, low-speed air flow inside the front wheel house 20, and the generation of vortices can be suppressed by the above-mentioned medium-speed wind a1.

[0073] In addition, in one embodiment of the present invention, the medium speed wind generating hole 39 is formed in a shape that follows the outer edge portion (bottom portion 37d, side portion 37e) of the deflector 30 on the rear portion (see rear wall 37) of the deflector 30 (see Figure 9).

[0074] According to this configuration, the medium-speed wind generating hole 39 is located along the deflector outer edge (bottom portion 37d, side portion 37e) of the rear surface of the deflector, so that the high-speed flow (high-speed separated wind a2) separating from the outer edge can be efficiently prevented from flowing into the space within the front wheel house 20.

[0075] Furthermore, in one embodiment of the present invention, the rear portion (rear wall 37) of the deflector 30 is substantially rectangular when viewed from the rear of the vehicle, and the medium-speed wind generating hole portion 39 is formed in an L-shape that includes a corner portion 37f at the lower inner side in the vehicle width direction of the rear portion (rear wall 37) (see Figure 9). According to this configuration, even with a simple configuration, it is possible to generate an air flow having a medium wind speed (medium-speed wind a1).

[0076] Furthermore, in one embodiment of the present invention, the deflector 30 is provided with a guide section 40 provided inside the deflector 30 for guiding the air introduced from the air guide section 38 to the medium speed wind generating hole section 39, and an outer hole section 45 for discharging the air introduced from the air guide section 38 obliquely outward in the vehicle width direction toward the rear of the vehicle in a region β facing the tire 21 when viewed from the front of the vehicle immediately behind the deflector 30, and the front end 40a of the guide section 40 is located behind the air guide section 38 and between the inner end and the outer end in the vehicle width direction (see Figures 7 and 11).

[0077] According to this configuration, the air introduced from the air guide section 38 can be divided by the guide section 40 into a flow toward the medium-speed airflow generating holes 39 and a flow toward the outer holes 45 . The air (deflected air a3) discharged obliquely from the outer hole 45 to the outside in the vehicle width direction flows toward the outside in the vehicle width direction of the tire 21. This makes it possible to prevent the air (vehicle body side air a4) separated from the outer trailing edge of the front bumper face 10 from being drawn into the front wheel house 20 from the outside of the front wheel house 20.

[0078] In short, it is possible to suppress the high-speed underfloor traveling wind (high-speed detached wind a2) that has detached from the outer edge portions (bottom portion 37d, side portion 37e) of the deflector 30 from flowing into the front wheel house 20 from below and from the inside in the vehicle width direction, and it is also possible to suppress the vehicle body side flow a4 that has detached from the outer rear edge of the front bumper face 10 from flowing into the front wheel house 20 from the outside in the vehicle width direction.

[0079] Additionally, in one embodiment of the present invention, the guide portion 40 extends in the vehicle front-rear direction, and its rear end is located between the outer hole portion 45 and the medium-speed wind generating hole portion 39 in the vehicle width direction. According to this configuration, the air flow inside the deflector 30 can be straightened, and the wind introduced from the wind guidance section 38 can be guided to the outer hole section 45 and the medium-speed wind generating hole section 39 reliably.

[0080] In the configuration of the present invention and the above-mentioned embodiment, The rear surface of the deflector of the present invention corresponds to the rear wall 37 of the deflector 30 of the embodiment. Similarly, The deflector outer edge corresponds to the bottom surface 37d and the side surface 37e of the deflector 30. The present invention is not limited to the configurations of the above-described embodiments. [Industrial Applicability]

[0081] INDUSTRIAL APPLICABILITY As described above, the present invention is useful for a front structure of a vehicle equipped with a deflector that protrudes downward from the lower surface of a front bumper face in front of a front wheel house. [Explanation of symbols]

[0082] 10…Front bumper face 20…Front wheel house 21…Tires 30…Deflector 37... Rear wall (rear part of deflector) 37d...Bottom surface (deflector outer edge) 37e...Side portion (deflector outer edge portion) 37f…corner 38…Air guide section 39…Medium speed wind generation hole 40…Guide section 40a...front end 45...Outer hole α: Area not facing the tire β: Area facing the tire

Claims

1. A front structure of a vehicle including a deflector protruding downward from a lower surface of a front bumper face in front of a front wheel house, The deflector includes a wind guide section in a front portion of the deflector for introducing air into a space inside the deflector; a medium-speed wind generating hole portion that is connected to the air guide portion and generates a flow of air having a medium wind speed that is lower than the wind speed of air separating from the outer edge portion of the deflector and higher than the wind speed of air in the front wheel house in an area immediately behind the deflector that does not face the tire when viewed from the front of the vehicle, The medium speed wind generating hole is formed in a rear surface of the deflector in a shape that follows an outer edge of the deflector. The front structure of the vehicle.

2. The rear portion of the deflector is substantially rectangular in shape when viewed from the rear of the vehicle, The medium-speed airflow generating hole is formed in an L-shape including a corner of the inside lower part in the vehicle width direction of the rear surface part. The vehicle front structure according to claim 1 .

3. A front structure of a vehicle including a deflector protruding downward from a lower surface of a front bumper face in front of a front wheel house, The deflector includes a wind guide section in a front portion of the deflector for introducing air into a space inside the deflector; a medium-speed wind generating hole portion that is connected to the air guide portion and generates a flow of air having a medium wind speed that is lower than the wind speed of air separating from the outer edge portion of the deflector and higher than the wind speed of air in the front wheel house in an area immediately behind the deflector that does not face the tire when viewed from the front of the vehicle, The deflector includes a guide portion provided inside the deflector and configured to guide the air introduced from the air guide portion to the medium speed air generating hole portion; an outer hole portion that discharges the air introduced from the air guide portion obliquely outward in the vehicle width direction toward the rear side of the vehicle in a region immediately behind the deflector facing the tire in a front view of the vehicle, The front end of the guide portion is located behind the air guide portion and between an inner end portion and an outer end portion in the vehicle width direction. The front structure of the vehicle.

4. The guide portion extends in the vehicle front-rear direction and has a rear end located between the outer hole portion and the medium-speed wind generating hole portion in the vehicle width direction. The vehicle front structure according to claim 3.

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