JP2021112943A - duct - Google Patents

Abstract

To provide a duct that can be attached to a vehicle independently of a side protector or a bumper and can suppress air resistance when a vehicle is traveling.SOLUTION: A duct wall 10H of a duct 10 of the present disclosure comprises a duct body part 11 having a substantially L shape, and has a lower end duct body part 15 corresponding to a horizontal side part and a vertically long duct body part 16 corresponding to a vertical side part. The lower end duct body part 15 is superposed on an undersurface 91 of a vehicle 90, and the vertically long duct body part 16 is arranged along a front side portion of a tire house 93. The lower end duct body part 15 is formed with an air intake port 27 that opens to the front side, and the vertically long duct body part 16 is formed with an air discharge port 37 that discharges air toward the outside of the tire house 92.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a duct that takes in air when the vehicle is traveling and discharges the air taken in from the front side portion in the tire house toward the diagonally rearward outer side.

In order to suppress air resistance when the vehicle is running, as aero parts for sports-specific side protectors and bumpers, the air flow that guides the air from the front side of the tire house diagonally to the rear and outside and covers the side openings of the tire house ( What forms a so-called air curtain) is known (see, for example, Patent Document 1).

Japanese Patent No. 6172123 (paragraph [0053], FIG. 4)

However, even in vehicles that are not sports specifications, there is a demand for the development of aero parts that can guide the air as described above from the viewpoint of improving fuel efficiency. Therefore, an object of the present disclosure is to provide a duct that can be attached to a vehicle regardless of a side protector or a bumper and can suppress air resistance when the vehicle is running.

The invention of claim 1 made to solve the above problem guides the air taken in at a position on the front side of the tire house of the vehicle to the front side portion in the tire house, and diagonally behind the tire house. A duct wall that is a duct that discharges to the outside and is provided with a lower end duct portion that is arranged on the lower surface of the vehicle at the lower end of a vertically long duct portion that extends in the vertical direction along the front side portion of the tire house. An air intake port formed in the lower end duct portion and opening toward the front side, and a vertically long air outlet formed in the vertically long duct portion and discharging air diagonally to the outside of the tire house. It is a duct provided with.

The invention according to claim 2 is the duct according to claim 1, wherein the lower end duct portion extends in the lateral direction of the vehicle, and the vertically elongated duct portion rises upward from one end portion thereof.

According to the third aspect of the present invention, the air intake port is arranged so that the air is taken in by moving toward one of the lower end duct portions in the vertical direction, and the vertically long duct portion is the vertically elongated duct main body portion extending in the vertical direction. The duct according to claim 1 or 2, further comprising a lead-out portion that projects diagonally rearward from the vertically long duct main body portion, and the tip of the lead-out portion serves as the air discharge port.

The invention according to claim 4 is the duct according to claim 3, wherein the vertically long duct main body has a circular cross section, and the inner peripheral surface of the vertically long duct main body and the inner surface of the lead-out portion are continuous.

According to the fifth aspect of the present invention, the lower end duct portion includes a lower end duct main body portion extending in the lateral direction and an introduction portion protruding forward from the lower end duct main body portion, and the tip of the introduction portion takes air. The duct according to claim 3 or 4, which is an inlet.

The invention according to claim 6 is the duct according to claim 5, wherein the lower end duct main body has a circular cross section, and the inner peripheral surface of the lower end duct main body and the inner side surface of the introduction portion are continuous. ..

In the invention of claim 7, the introduction portion is arranged closer to the upper side of the lower end duct main body portion, while the lead-out portion is arranged from the side of the vertically long duct main body portion away from the side opening of the tire house. The duct according to claim 5 or 6, which projects toward the side opening side of the tire house.

According to the eighth aspect of the present invention, the air taken in from the air intake port swirls and flows into the vertically long duct portion, and the air flows in the traveling direction of the swirl from a position closer to one of the lateral directions of the vertically long duct portion. The duct according to claim 1, wherein the air outlet is arranged so as to be discharged.

The invention according to claim 9 is the duct according to any one of claims 1 to 8, wherein the lower end duct portion projects laterally and a mounting piece is provided on the lower surface of the vehicle to be fixed with bolts or rivets. be.

The invention of claim 10 is the duct according to any one of claims 1 to 9, which is a blow-molded product.

The duct wall of the duct according to claim 1 includes a lower end duct portion arranged on the lower surface of the vehicle at the lower end of a vertically long duct portion extending in the vertical direction along the front side portion of the tire house. Then, the air taken in from under the vehicle by the air intake port of the lower end duct part is discharged from the air discharge port of the vertically long duct part diagonally to the outside of the tire house to cover the side opening of the tire house. It is possible to create an air flow (so-called air duct) and reduce the air resistance when the vehicle is running. That is, according to the duct of the present disclosure, it can be attached to the vehicle regardless of the side protector and the bumper, and the air resistance during the vehicle running can be suppressed.

In the configuration of claim 2, the lower end duct portion can be extended in the lateral direction of the vehicle to make the air intake port horizontally long so that the lower end duct portion can be made compact in the vertical direction, and the amount of protrusion from the lower surface of the vehicle can be suppressed. Is possible.

Here, the air intake port may have a configuration formed over the entire vertical direction of the lower end duct portion, or may be moved to one of the vertical directions in the lower end duct portion as in the configuration of claim 3. It may be the structure formed by the above. Further, the shape may be circular or polygonal (including a triangle or a quadrangle).

The vertically long duct portion may have a configuration in which an air discharge port is formed on the outer surface of the vertically long duct main body portion, or includes a lead-out portion that projects diagonally rearward from the vertically long duct main body portion as in the configuration of claim 3. , The tip of the lead-out portion may be an air outlet. According to the third aspect, it is possible to stabilize the flow direction of the air discharged from the air discharge port.

According to the configuration of claim 4, air can be smoothly guided from the vertically long duct main body portion to the lead-out portion.

According to the configuration of claim 5, it is possible to align the flow directions of the taken-in air and guide the air to the lower end duct main body.

According to the configuration of claim 6, air can be smoothly guided from the introduction portion to the lower end duct main body portion.

Here, the introduction portion and the lead-out portion are arranged so that the introduction portion is arranged closer to the lower side of the lower end duct main body portion, and the lead-out portion is arranged from the side of the vertically long duct main body portion near the side opening of the tire house to the side opening side of the tire house. It may be configured to protrude toward the direction, or as in the configuration of claim 7, the introduction portion is arranged closer to the upper side of the lower end duct main body portion, and the lead-out portion is arranged from the side opening of the tire house in the vertically long duct main body portion. It may be configured to project from a distant side toward the side opening side of the tire house.

By swirling the taken-in air and discharging the air in the swirling direction as in the duct of claim 8, the above-mentioned air curtain is moved in the vertical direction so as to be confirmed from the simulation results of the examples described later. It becomes possible to expand.

The duct may be attached to the vehicle by welding or adhesion, or as in the configuration of claim 9, a mounting piece projecting laterally from the lower end duct portion is provided and attached to the vehicle with bolts or rivets. It may be a configuration.

The duct may be made of metal or resin. When it is made of resin, it may be, for example, an injection-molded product or a blow-molded product as in the configuration of claim 10. When manufactured by blow molding, the blow molding material has a relatively high molecular weight as compared with the molding material used for injection molding, and therefore has excellent impact strength in cold weather. Further, when it is provided on the lower surface of the vehicle, it becomes a duct having excellent impact resistance such as flying stones.

Perspective view of the duct according to the embodiment Front view of the duct Side view of the duct Top view of the duct (A) AA sectional view in FIG. 3 and (B) BB sectional view in FIG. Sectional view of the duct attached to the vehicle Perspective view of invention B in Examples Simulation results when Invention A is viewed from the front view side Simulation results when Invention A is viewed from the side view Simulation results when Invention A is viewed from the top view side Simulation results on the CC cut surface in FIG. Simulation results when invention B is viewed from the front view side Simulation results when invention B is viewed from the side view Simulation results when Invention B is viewed from the top view side Simulation results on the DD cut surface in FIG. Perspective view of the duct according to the modified example

Hereinafter, embodiments of the present disclosure will be described with reference to FIGS. 1 to 15. As shown in FIG. 1, the duct wall 10H of the duct 10 of the present embodiment has a substantially L-shaped duct main body portion 11. The duct main body 11 has a circular cross section, and the inner diameter thereof is uniform throughout the duct main body 11. Further, both ends of the duct main body 11 are closed by end walls 12 and 13. Hereinafter, the direction in which the L-shaped lateral side portion of the duct main body portion 11 in FIG. 1 extends is referred to as the lateral direction H1 of the duct 10. Further, the direction orthogonal to the lateral direction H1 and from the left side of the paper surface to the right back side in FIG. 1 is referred to as the front-rear direction H2 of the duct 10, the "left side" in FIG. 1 is the "front side", and the "right back side" in FIG. Is referred to as "rear side". Further, the vertical direction in FIG. 1 is referred to as the vertical direction H3 of the duct 10. The lateral direction H1, the front-rear direction H2, and the vertical direction H3 of the duct 10 coincide with the front-rear, left-right, and up-down directions of the vehicle 90 in the state of being mounted on the vehicle 90, which will be described later.

The L-shaped corner portion 14 of the duct main body portion 11 has an arc shape, and the lower end duct main body portion 15 corresponding to the horizontal side portion of the L-shape extends straight in the lateral direction H1. On the other hand, as shown in FIG. 3, the vertically long duct main body portion 16 corresponding to the vertical side portion of the L-shape is slightly inclined rearward from the corner portion 14 and extends diagonally upward, and then slightly bends rearward. It slopes further to the rear and extends diagonally upward.

The arcuate corner portion 14 is a shared portion between the lower end duct main body portion 15 and the vertically long duct main body portion 16. That is, it can be said that the lower end duct main body 15 is provided at the lower end of the vertically long duct main body 16, and it can be said that the vertically long duct main body 16 rises upward from one end of the lower end duct main body 15. Further, the duct main body portion 11 does not have a corner portion 14, and as shown in FIG. 16, the lower end duct main body portion 15 may be branched from the lower portion of the vertically long duct main body portion 16.

As shown in FIG. 1, the lower end duct main body portion 15 is provided with an introduction portion 20 projecting to the front side. The introduction portion 20 has a horizontally long rectangular cross section and has a uniform size in the axial direction.

As shown in FIG. 2, the introduction portion 20 is arranged above the lower end duct main body portion 15 in the vertical direction H3 and closer to the end wall 12 side in the lateral direction H1. As a result, the upper wall 21 of the introduction portion 20 is smoothly continuous with the outer peripheral wall of the lower end duct main body portion 15, and the side wall 22 is flush with the end wall 12. On the other hand, the lower wall 23 of the introduction portion 20 is located slightly below the central axis 15J of the lower end duct main body portion 15 and is in contact with the lower end duct main body portion 15 so as to intersect with the lower wall 23. Further, as shown in FIG. 4, the side wall 24 has a curved end on the lower end duct main body 15 side and communicates with the lower end duct main body 15. The end wall 12 extends in a direction orthogonal to the central axis 15J so that the front side of the lower end duct main body 15 from the central axis 15J is flush with the side wall 21 of the introduction portion 20, while the rear side from the central axis 15J is. It is curved.

As shown in FIG. 1, a pair of mounting pieces 25 projecting in the lateral direction H1 are provided at the tip of the introduction portion 20. The mounting piece 25 extends flush with the upper wall 21 and has a mounting hole 26.

The introduction portion 20 is an air intake port 27 whose tip is open to the front side. In the present embodiment, as described above, the introduction portion 20 has a horizontally long rectangle in cross section, and the air intake port 27 also has a horizontally long rectangle. The mouth 27 may be, for example, a vertically long rectangle, a square, or a circle. Further, the air intake port 27 may have a shape in which the tip thereof is widened in a funnel shape in order to stably guide the captured air to the introduction portion 20.

The air taken into the air intake port 27 is guided by the introduction portion 20 and heads toward the lower end duct main body portion 15. Here, as shown in FIG. 5B, the inner surface of the upper wall 21 of the introduction portion 20 is smoothly continuous with the inner surface of the lower end duct main body portion 15. In other words, the inner surface of the upper wall 21 is arranged on the tangent line of the upper point P1 intersecting the center line 15C extending in the vertical direction in the inner peripheral surface of the lower end duct main body 15. The inner surface of the upper wall 21 extends in the tangential direction of the inner peripheral surface of the lower end duct main body 15. As a result, air is smoothly guided from the introduction portion 20 to the lower end duct main body portion 15.

Further, the air flowing into the lower end duct main body 15 is brought closer to the upper side of the lower end duct main body 15 in the vertical direction H3 and taken in. Then, guided by the inner peripheral surface of the lower end duct main body 15, the duct heads toward the vertically long duct main body 16 while turning clockwise in the traveling direction.

As shown in FIG. 1, the vertically long duct main body portion 16 is provided with a lead-out portion 30. As shown in FIG. 3, the lead-out portion 30 is arranged from a slightly bent portion of the vertically long duct main body portion 16 to a tip portion, and has a vertically long rectangular cross section. Then, as shown in FIG. 4, the lead-out portion 30 is obliquely rearward from a position closer to one side of the lateral direction H1 of the vertically long duct main body portion 16 on which the lower end duct main body portion 15 extends. It is extending. The extending direction of the lead-out unit 30 is a direction along the flow of air that swirls clockwise toward the traveling direction (see FIG. 5 (A)). Further, as shown in FIG. 3, the lead-out portion 30 has a surface in which the central shaft 30J extends parallel to the horizontal direction and the tip portion thereof is parallel to the central shaft 16J of the portion in which the lead-out portion 30 of the vertically long duct main body portion 16 communicates. It is shaped like it was cut with.

As shown in FIG. 4, in the lead-out portion 30, the side wall 31 facing the side where the lower end duct main body 15 extends in the lateral direction H1 is smoothly continuous with the outer peripheral wall of the vertically long duct main body 16. On the other hand, the side wall 32 facing the side wall 31 is in contact with the outer peripheral wall of the vertically long duct main body 16 so as to intersect. Further, the lead-out portion 30 communicates so that the upper wall 33 is slightly bent from the outer edge portion of the end wall 13. The end wall 13 is inclined so as to slightly rise from the front side to the rear side.

The air flowing from the lower end duct main body 15 goes from the vertically long duct main body 16 to the outlet 30. Here, as shown in FIG. 5A, the inner surface of the side wall 31 of the lead-out portion 30 is smoothly continuous with the inner surface of the vertically long duct main body portion 16. In other words, the inner side surface of the side wall 31 is the inner side surface of the vertically long duct main body 16 in FIG. It is arranged on the tangent line of the upper point P2. The inner surface of the side wall 31 extends in the tangential direction of the inner peripheral surface of the vertically long duct main body 16. As a result, air is smoothly guided from the vertically long duct main body 16 to the lead-out 30.

The tip of the lead-out unit 30 is an air discharge port 37. The air discharged from the air discharge port 37 is discharged diagonally to the rear side along the central axis 30J of the outlet portion 30.

The duct 10 is made of a resin (for example, polyethylene (HDPE, LDPE), polypropylene (PP), etc.) and is manufactured by, for example, blow molding. The duct 10 is not limited to the blow molded product, and may be an injection molded product or may be manufactured by another manufacturing method. Further, the duct 10 is not limited to the one made of resin, and may be made of metal. When manufactured by blow molding, the blow molding material has a relatively high molecular weight as compared with the molding material used for injection molding, and therefore has excellent impact strength in cold weather. Further, when it is provided on the lower surface of the vehicle 90, it becomes a duct 10 having excellent impact durability such as stepping stones.

In the present embodiment, the vertically long duct main body 16 and the lead-out portion 30 correspond to the “vertical duct portion” in the claims, and the lower end duct main body 15 and the introduction portion 20 correspond to the “lower end” in the claims. Corresponds to the "duct part".

The configuration of the duct 10 of the present embodiment is as described above. Next, the action and effect of the duct 10 of the present embodiment will be described. As shown in FIGS. 3 and 6, the duct 10 of the present embodiment is superposed on the lower surface 91 of the vehicle 90 so that the lower end duct main body 15 extends in the lateral direction of the vehicle 90, and the vertically long duct main body 16 is a tire house. The vehicles 90 are stacked so as to extend in the vertical direction along the front portion of the 93. Then, bolts or rivets are attached to the mounting holes 26 of the pair of mounting pieces 25 and fixed to the vehicle 90. Then, in the duct 10, the introduction portion 20 extends in the front-rear direction of the vehicle 90, the air intake port 27 opens to the front side, and the lead-out portion 30 moves from the side away from the side opening 93K of the tire house 93 to the side opening 93K side. It will be in a protruding state.

When the vehicle 90 travels, air is taken in from the air intake port 27 and flows from the lower end duct main body portion 15 to the vertically long duct main body portion 16, and as shown in FIG. 6, the central axis 30J of the outlet portion 30 is taken from the air discharge port 37. It is discharged diagonally backward along. Then, it flows from between the side opening 93K of the tire house 93 and the front outer edge of the tire 92 to the outside of the tire house 93.

As described above, according to the duct 10 of the present embodiment, it is possible to create an air flow (so-called air curtain) that covers the tire house 93 from the outside, and it is possible to reduce the air resistance during vehicle running. Become. That is, according to the duct 10 of the present embodiment, it can be attached to the vehicle 90 regardless of the side protector and the bumper, and the air resistance during the vehicle traveling can be suppressed.

In the duct 10 of the present embodiment, the lower end duct main body 15 can be extended in the lateral direction of the vehicle 90 to make the air intake port 27 horizontally long, and the lower end duct main body 15 can be made compact in the vertical direction H3. It is possible to suppress the amount of protrusion from the lower surface 91 of the. Further, as can be confirmed from the simulation results of the examples described later, by making the air intake port 27 horizontally long, it is possible to take in air widely and evenly.

Further, in the duct 10 of the present embodiment, the air intake port 27 is arranged close to one side (specifically, the upper side) of the lower end duct main body 15 in the vertical direction H3, and the air taken in is taken in by the lower end duct main body 15. Guided by the inner peripheral wall of the duct, the duct heads toward the vertically long duct main body 16 while turning. Then, the air discharge port 37 is arranged so that air is discharged in the traveling direction of turning from a position closer to one side of the vertically long duct main body 16 in the lateral direction H1 (specifically, the side on which the lower end duct main body 15 extends). Has been done. This makes it possible to expand the above-mentioned air curtain in the vertical direction H3, as can be confirmed from the simulation results of the examples described later.

Moreover, in the present embodiment, since the lead-out portion 30 projects diagonally rearward from the vertically long duct main body portion 16, it is possible to stabilize the flow direction of the air discharged from the air discharge port 37. Further, since the inner peripheral surface of the vertically long duct main body 16 having a circular cross section and the inner side surface of the side wall 31 of the lead-out portion 30 are continuous on a tangent line, air is smoothly guided from the vertically long duct main body 16 to the lead-out portion 30. It becomes possible to do.

Further, in the present embodiment, since the introduction portion 20 is projected from the lower end duct main body portion 15 to the front side, it is possible to guide the introduced air to the lower end duct main body portion 15 in the same direction. Further, since the inner peripheral surface of the lower end duct main body 15 having a circular cross section and the inner side surface of the upper wall 21 of the introduction portion 20 are continuous on the tangent line, the lower end duct main body 15 is aligned with the flow direction of the taken-in air. It will be possible to guide you to.

[Example]
A simulation analysis was performed to confirm the effect of the duct of the present disclosure.
1. 1. Simulation analysis (A) Using a fluid analysis simulator, the flow of air in invention A and invention B and the spread of air discharged from the air outlet were analyzed.
The invention product A corresponds to the duct 10 of the above embodiment. The invention product B is shown in FIG. 7, and although the opening areas of the air intake port and the air discharge port are the same as those of the invention product A, the shape of the air intake port is vertically long and the air intake port is connected to the air discharge port. The lead-out portion is different from Invention A in that the outer peripheral wall of the vertically long duct main body and the center line extending in the front-rear direction H2 of the vertically long duct main body project diagonally to the rear side from the intersection.

A. Experimental conditions (1) Comparison of invention product A and invention product B Invention product A: Air intake port 18 × 48 [mm], air outlet port 10 × 90 [mm]
Duct body inner diameter φ32 [mm]
Invention B: Air intake port 32 x 27 [mm], air discharge port 10 x 90 [mm]
Duct body inner diameter φ32 [mm]

(2) Analysis conditions Air temperature: 23 [° C]
Wind speed: 37 [km / hour]
Air volume: 32 [m ³ / hour]

B. Experimental Results FIGS. 8 to 10 and 12 to 14 show the air flow when the invention A and the invention B are viewed from the front view side, the side view side, and the top view side. 11 and 15 show the flow velocity distribution of the air discharged from the air outlets of Invention A and Invention B.

From FIGS. 10 and 14, it can be seen that both the inventions A and B take in air into the air intake port from a wide range in the lateral direction H1. Further, it can be seen that the invention product A can take in air into the air intake port more evenly than the invention product B. From FIGS. 9 and 13, and FIGS. 10 and 14, it can be seen that the invention product A is easier to swirl the air in the lower end duct main body than the invention product B. Further, from the comparison between FIGS. 8 and 12 and the comparison between FIGS. 9 and 13, it can be seen that the air in the invention A swirls more cleanly from the corner to the vertically long duct main body than in the invention B.

From FIGS. 10 and 14, it can be seen that the air discharged from the air discharge port is discharged diagonally rearward to the side away from the lower end duct main body in both the inventions A and B. Further, in the invention product A, the air discharged from the air discharge port does not spread in the lateral direction H1 but flows linearly as compared with the invention product B, and is discharged toward the side further away from the lower end duct main body. You can see that it has been done. From FIGS. 9 and 13, and from FIGS. 11 and 15, it can be seen that the air discharged from the air discharge port spreads in the vertical direction H3 in both the inventions A and B. Further, it can be seen that the invention product A has a larger spread of the air discharged from the air discharge port in the vertical direction H3 and a smaller unevenness than the invention product B. From this, it can be seen that the so-called air curtain can be formed by discharging the taken-in air diagonally rearward to the side away from the lower end duct main body in both the inventions A and B. Further, it can be seen that the invention product A can make an air curtain that spreads more in the vertical direction H3 than the invention product B.

[Other Embodiments]
(1) In the above embodiment, the lower end duct main body 15 is configured to extend in the lateral direction H1, but the lower end duct main body 15 may be configured to extend in the front-rear direction H2.

(2) In the above embodiment, the lead-out portion 30 protrudes from the vertically long duct main body portion 16, but an air discharge port is formed on the outer peripheral wall of the vertically long duct main body portion 16 without providing the lead-out portion 30. It may be a configuration. Similarly, the introduction portion 20 was configured to protrude from the lower end duct main body portion 15, but the configuration was such that the air intake port was formed on the outer peripheral wall of the lower end duct main body portion 15 without providing the introduction portion 20. May be good.

(3) In the above embodiment, the duct main body 11 has a circular cross section, but the duct main body 11 may have a rectangular cross section or a shape in which the corners of the rectangle are chamfered. Further, the duct main body portion 11 does not have to be uniform in the entire duct main body portion 11.

(4) In the above embodiment, as shown in FIG. 5A, the lead-out portion 30 is a vertically long duct so that the inner side surface of the side wall 31 of the lead-out portion 30 is smoothly connected to the inner peripheral surface of the vertically long duct main body portion 16. Although it was in contact with the main body 16, if it is possible to discharge air from the air discharge port 37 of the lead-out portion 30 diagonally rearward and outward of the tire house 93, for example, the inner surface of the side wall 31 of the lead-out portion 30 is a vertically long duct main body. It may be configured so as to intersect the inner peripheral surface of the portion 16 (see FIG. 7).

(5) Further, as shown in FIG. 5A, the air discharge port 37 has the tip of the lead-out portion 30 cut at a plane parallel to the center line 16C1 extending in the lateral direction H1 of the vertically long duct main body portion 16. Although the configuration was open to the rear side, for example, the tip of the lead-out portion 30 shown in FIG. 5 (A) may be cut at a plane orthogonal to the central axis 30J and opened diagonally to the rear side. ..

(6) In the duct 10, the introduction portion 20 is arranged closer to the lower side of the lower end duct main body 15 in the vertical direction H3, and the outlet portion 30 is arranged in the lateral direction H1 of the vertically long duct main body 16 by the lower end duct main body 15. The configuration may be such that it protrudes from the side opposite to the extending side toward the side further away from the lower end duct main body portion 15. The configuration of the embodiment in which the introduction portion 20 is arranged closer to the upper side of the lower end duct main body portion 15 in the vertical direction H3 allows the air intake port 27 to be separated from the ground.

(7) In the above embodiment, the duct 10 is fixed to the vehicle 90 by the mounting piece 25, but for example, it may be fixed by adhesion. Further, for example, when the duct 10 is made of metal, it may be fixed by welding.

10 Duct 10H Duct wall 15 Lower end duct main body 16 Vertical duct main body 20 Introductory part 25 Mounting piece 27 Air intake port 30 Outlet part 37 Air outlet

Claims (10)

It is a duct that guides the air taken in from the front side of the tire house of the vehicle to the front side part in the tire house and discharges it diagonally to the outside of the tire house diagonally behind.
A duct wall having a lower end duct portion arranged on the lower surface of the vehicle at the lower end of a vertically long duct portion extending in the vertical direction along the front side portion of the tire house.
An air intake port formed in the lower end duct portion and opening toward the front side,
A duct formed in the vertically long duct portion and provided with a vertically long air discharge port for discharging air diagonally to the outside of the tire house. The duct according to claim 1, wherein the lower end duct portion extends in the lateral direction of the vehicle, and the vertically long duct portion rises upward from one end portion thereof. The air intake port is arranged so that air can be taken in by moving the air in one of the vertical directions in the lower end duct portion.
The vertically long duct portion includes a vertically long duct main body portion extending in the vertical direction and a lead-out portion that projects diagonally rearward from the vertically long duct main body portion, and the tip of the lead-out portion serves as the air discharge port. The duct according to claim 1 or 2. The duct according to claim 3, wherein the vertically long duct main body has a circular cross section, and the inner peripheral surface of the vertically long duct main body and the inner side surface of the lead-out portion are continuous. The lower end duct portion includes a lower end duct main body portion extending in the lateral direction and an introduction portion protruding forward from the lower end duct main body portion, and the tip of the introduction portion serves as the air intake port. Item 3. The duct according to item 3. The duct according to claim 5, wherein the lower end duct main body has a circular cross section, and the inner peripheral surface of the lower end duct main body and the inner side surface of the introduction portion are continuous. The introduction portion is arranged closer to the upper side of the lower end duct main body portion, while the introduction portion is arranged.
The duct according to claim 5 or 6, wherein the lead-out portion projects from a side of the vertically long duct main body portion away from the side opening side of the tire house toward the side opening side of the tire house. The air taken in from the air intake port swirls and flows into the vertically long duct portion.
4. Duct. The duct according to claim 1, further comprising a mounting piece that projects laterally from the lower end duct portion and is fixed to the lower surface of the vehicle with bolts or rivets. The duct according to any one of claims 1 to 9, which is a blow-molded product.

Images