JP6405123B2 - Vehicle rectifier - Google Patents

Description

  The present invention relates to a rectifier for a vehicle that can reduce air resistance when the vehicle is traveling with a simple structure.

  In general, in the case of vehicles such as large trucks, a rectifier such as a side skirt is provided to cover the lower side of the loading platform, improving aerodynamic characteristics during driving, improving fuel economy, and improving economy There is.

  For example, Patent Document 1 discloses a general technical level related to such a vehicle rectifier.

JP 2007-223359 A

  However, in the side skirt type rectifier that covers the lower side of the loading platform as described above, although air flowing along the outside of the vehicle side surface can be suppressed from being caught in the rear wheel, There has been a problem that the air that has entered the space between the bottom of the vehicle and the road surface from under the front of the vehicle and escapes to the side of the vehicle cannot be efficiently released.

  When the vehicle is running, there is an air flow (underfloor flow) that flows from the bottom of the front of the vehicle into the gap between the bottom of the vehicle and the road surface. However, the bottom of the vehicle is not smooth, and the engine intake and exhaust systems It has a complex surface structure with a lot of equipment such as piping and fuel tanks. For this reason, as shown in FIG. 7, the air (floor flow) A1 that has entered here does not flow linearly to the rear of the vehicle, but after colliding with various obstacles to form a complex air current. Most of the tires are pulled out laterally from openings such as between the tires on the side of the vehicle.

  Here, if the side skirt as described above is attached to the vehicle, the opening on the side of the vehicle, which is the escape route for the underfloor flow, is blocked. Could increase.

  Further, as described above, various devices such as an engine are attached to the bottom surface of the vehicle, but the flow under the floor also has an effect of releasing heat generated from the engine or the like. If the side skirt blocks the escape path of the underfloor flow, equipment such as the engine is not sufficiently cooled, and heat may be trapped under the floor.

  Furthermore, when a side skirt is mounted on the vehicle, the side wind skirt increases the wind receiving area of the vehicle against the cross wind, and thus there is a problem that the cross wind stability is impaired. In Patent Document 1, a through hole (communication portion) is opened in the side skirt, and air is passed using a pressure difference generated between the inner surface and the outer surface of the side skirt when subjected to cross wind. Although the invention for reducing the force received from the cross wind is described, the wind receiving area itself does not change even in such a case, and it is considered that the effect of suppressing the decrease in the cross wind stability is limited.

  In addition, when the side skirt is not attached, as described above, the underfloor flow A1 escapes to the side of the vehicle as shown in FIG. There is a problem in that air flow A2 and a lateral air flow (underfloor flow) A1 from the gap between the vehicle bottom surface and the road surface to the side of the vehicle collide to generate turbulent flow and increase air resistance. Of the underfloor flow A1, the flow from the rear of the front tire located at the forefront of the vehicle to the side of the vehicle is large in both flow velocity and flow rate, so the air resistance at this location is particularly high (location surrounded by a broken line in the figure). .

  In view of such circumstances, the present invention seeks to provide a rectifier that can reduce air resistance during travel of a vehicle with a simple structure without impairing cooling performance and crosswind stability of the engine.

The present invention includes a current plate that is attached between a vehicle bottom surface and a road surface on the lower side of the vehicle, and that has a curved surface that protrudes from the inner side to the outer side in the left-right direction and curves toward the rear side. rear end of the are to name a surface along the sides of the vehicle, as the current plate, and the first rectifier plate positioned on the front side, and a second straightening vane that is adjacent to the rear side of the first rectifier plate A flow path through which air flows between the rear surface of the first rectifying plate and the front surface of the second rectifying plate, and a gap formed between the rear surface of the first rectifying plate and the front surface of the second rectifying plate. Is a vehicle rectifying device characterized in that the width becomes narrower from the front side toward the rear side, and the air passing therethrough is configured so that the flow path is narrowed and the flow velocity is increased. is there.

Thus, in this way, the direction of the underfloor flow that escapes to the side of the vehicle can be made substantially parallel to the flow of the air flowing backward on the side of the vehicle. In addition, it is possible to suppress the turbulence of the air generated between the air flow flowing backward on the vehicle side surface. Moreover, since the vehicle lower side surface is open over almost the entire surface, the heat of the engine can be efficiently released, and the crosswind stability is not deteriorated. In addition, the underfloor flow that has passed through the flow path is unlikely to peel off from the side surface of the vehicle and can flow stably along the side surface of the vehicle to the rear, so that air resistance can be more efficiently reduced.

  In the vehicle rectifying device of the present invention, the first rectifying plate and the second rectifying plate are formed by cutting and raising a central portion of a single plate material, so that the raised portion of the plate material is used as the second rectifying plate. The remaining portion can be formed as the first current plate.

  If it does in this way, since the 1st current plate and the 2nd current plate can be formed in one, the number of parts can be reduced and the cost concerning parts management and the effort concerning assembly work can be reduced.

  The vehicle rectifier of the present invention is preferably provided behind the front tire.

  In this way, air turbulence can be reduced most effectively.

  According to the rectifying device for a vehicle of the present invention, it is possible to achieve an excellent effect that the air resistance during traveling of the vehicle can be reduced with a simple structure without impairing the cooling performance and cross wind stability of the engine.

It is a side view which shows a mode that the rectifier of the vehicle by implementation of this invention was attached to the vehicle. It is a bottom view which shows a mode that the rectifier of the vehicle by implementation of this invention was attached to the vehicle. An example of the rectification | straightening apparatus of the vehicle by implementation of this invention is shown, (a) is a side view, (b) is a top view. It is a conceptual diagram (bottom view) which expands and shows the rectification effect | action of the rectifier of the vehicle by implementation of this invention. It is a conceptual diagram (bottom view) which shows the flow of the air during driving | running | working of the vehicle equipped with the rectifier of the vehicle by implementation of this invention. The other example of the rectification | straightening apparatus of the vehicle by implementation of this invention is shown, (a) is a side view, (b) is a top view, (c) is CC arrow directional view of (a). It is a conceptual diagram (bottom view) which shows the flow of the air during driving | running | working of the conventional vehicle.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 3 show an example (first embodiment) of a vehicle rectifier according to an embodiment of the present invention. A pair of left and right rectifiers 2 are attached between the bottom surface of the vehicle 1 on the lower side of the vehicle 1 and the road surface. The rectifying device 2 is provided behind a tire located in front of the vehicle 1. In the example shown here, the vehicle 1 is a front biaxial truck and a rear biaxial truck. Therefore, the rectifying device 2 is the rear of the front tire 3a among the front tires 3a and 3b, that is, the front tires 3a and 3b. Installed between.

  The rectifying device 2 includes two rectifying plates, a first rectifying plate 4 positioned on the front side and a second rectifying plate 5 adjacent to the rear side of the first rectifying plate 4. The first rectifying plate 4 and the second rectifying plate 5 each form a curved surface that protrudes from the inner side in the left-right direction of the vehicle 1 to the outer side and curves toward the rear side. It forms a surface along the side of the vehicle.

  Between the first rectifying plate 4 and the second rectifying plate 5, a flow path 6 through which air flows is formed by the rear surface 4 a of the first rectifying plate 4 and the front surface 5 a of the second rectifying plate 5. The gap formed between the rear surface 4a and the front surface 5a of the second rectifying plate 5 becomes narrower as it goes from the front side of the vehicle 1 toward the rear side, thereby reducing the cross-sectional area of the flow path 6 to a tapered shape. ing.

  Next, the operation of the above embodiment will be described with reference to FIGS. FIG. 4 is an enlarged view showing in detail a part of FIG. 5 (a part surrounded by a broken line).

  The air (underfloor flow A3) flowing between the bottom surface of the vehicle 1 and the road surface from below the front surface of the vehicle 1 forms a complicated flow path due to the structure of the bottom surface of the vehicle 1, and a part of the air flows laterally from the side of the vehicle. Try to escape. In particular, the air flowing in the lateral direction from the rear of the front tire 3a located in front of the vehicle 1 has a large flow rate and flow velocity. However, since the rectifier 2 is attached to the rear of the front tire 3a, the underfloor flow A3 does not escape to the vehicle side as it is, and the lateral flow toward the vehicle side is first as shown in FIG. It collides with the rear surface 4a of one current plate 4, and the direction can be changed to the vehicle rearward along the curved surface formed by the first current plate 4.

  The air whose direction has been changed flows along a flow path 6 formed between the rear surface 4a of the first rectifying plate 4 and the front surface 5a of the second rectifying plate 5 on the rear side. Since the rear side end portion of the first rectifying plate 4 is substantially along the side surface of the vehicle 1, the air flow is substantially parallel to the air flow A <b> 4 flowing backward on the vehicle side surface and flows toward the rear of the vehicle. Thereby, the turbulence of the air generated between the underfloor flow A3 that has passed through the flow path 6 and the air flow A4 that flows rearward on the vehicle side surface can be suppressed.

  Further, the vehicle rectifier of the present embodiment is only attached to the rear of the front tire 3a of the vehicle 1, and does not cover the lower side surface of the vehicle, and the lower side surface of the vehicle is open over substantially the entire surface. Therefore, unlike the conventional side skirt type rectifier, the heat of the engine can be efficiently released, and the cross wind stability is not lowered.

  As described above, in the underfloor flow A3, the air flowing laterally from the rear of the front tire 3a located in front of the vehicle 1 has a particularly large flow rate and flow velocity. By making it behind, air turbulence can be reduced most effectively.

  At this time, as described above, since the flow path 6 has a tapered shape, the underfloor flow A3 passing through the flow path 6 along the side surface of the vehicle 1 with the flow path narrowed and the flow velocity increased. It will be swept backwards. For this reason, the underfloor flow A3 that has passed through the flow path 6 is difficult to peel off from the side surface of the vehicle and can flow stably along the side surface of the vehicle 1 as shown in FIG. It can be reduced efficiently.

  Therefore, according to the first embodiment, it is possible to reduce the air resistance when the vehicle travels with a simple structure without impairing the cooling performance and cross wind stability of the engine.

  FIG. 6 shows another example (second embodiment) of a vehicle rectifier according to an embodiment of the present invention. In the rectifying device 7 according to the present embodiment, the first rectifying plate 8 and the second rectifying plate 9 are not formed as separate members, but by cutting and raising the central portion of the single plate material 10 into a rectangular shape. The cut and raised portion is formed as the second rectifying plate 9, and the remaining portion is formed as the first rectifying plate 8. Then, the rear surface 8a of the first current plate 8 and the front surface 9a of the second current plate 9 are curved by different curvatures of the second current plate 9 that is the cut and raised piece and the first current plate 8 that is the remaining part. A tapered flow path 11 is formed between the two.

  In this way, since the first rectifying plate 8 and the second rectifying plate 9 can be integrally formed, the number of components can be reduced, and the cost of component management and labor for assembling can be reduced. In addition, since the effect of a present Example is the same as that of the said 1st Example, description is abbreviate | omitted.

  Therefore, according to the second embodiment, the air resistance when the vehicle is traveling can be reduced with a simple structure without impairing the cooling performance and the cross wind stability of the engine.

  The vehicle rectifier of the present invention is not limited to the above-described embodiment. For example, in the present embodiment, only one pair (one step) is provided between the left and right front tires. It goes without saying that various changes can be made without departing from the gist of the present invention, such as the fact that a plurality of stages may be installed at a plurality of locations below.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Rectifier 3a, 3b Front tire 4 First rectifier 4a Rear surface 5 Second rectifier 5a Front 6 Flow path 7 Rectifier 8 First rectifier 9 Second rectifier 10 Plate material

Claims (3)

It is attached between the vehicle bottom and the road surface on the lower side of the vehicle,
Projecting toward the lateral direction inside of the vehicle to the outside, includes a to rectifying plate such a curved surface which is curved toward the rear side,
Rear end of the rectifying plate has Rename the surface along the side of the vehicle,
As the current plate, a first current plate located on the front side, and a second current plate adjacent to the rear side of the first current plate,
A flow path through which air flows is formed between the rear surface of the first rectifying plate and the front surface of the second rectifying plate,
The gap between the rear surface of the first rectifying plate and the front surface of the second rectifying plate becomes narrower from the front side toward the rear side, and the air passing therethrough has a narrow flow path and a high flow rate. It is comprised so that it may become . The rectifier of the vehicle characterized by the above-mentioned . The first rectifying plate and the second rectifying plate are formed by cutting and raising a central portion of a single plate material, so that the raised portion of the plate material is the second rectifying plate, and the remaining portion is the first rectifying plate. The vehicle rectifier according to claim 1 , wherein the vehicle rectifier is formed as a plate. Rectifying apparatus for a vehicle according to claim 1 or 2, characterized in that provided in the rear of the front tire.

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