JPH0632470Y2 - Rear deflector structure of automobile - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a vehicle rear deflector structure, and more specifically, it is attached to the rear part of a vehicle body whose rear corners are substantially rectangular, such as buses and wagons. The present invention relates to a vehicle rear deflector structure for rectifying the air flow in the rear part of the vehicle body.

(Prior Art) In recent automobiles, depending on the type of vehicle used, box-shaped ones have been increasing for the purpose of increasing the space inside the vehicle. In this type of automobile, the curvature of the rear corners, which are the boundaries between the upper and side surfaces of the vehicle body and the rear surface, tends to be small. This decrease in curvature accelerates the separation of the airflow flowing along the surface of the vehicle body, expands the turbulence, and impairs fuel economy and steering stability.

In order to solve this problem, some conventional automobiles have a rear deflector 2 attached to the rear corner portion 6 of the vehicle body 1 for the purpose of rectifying the flow of air, as shown in FIG. The rear deflector 2 is attached by forming an air passage 5 in an upper rear corner portion 6 which is a boundary between the upper surface 3 and the rear surface 4 of the vehicle body 1. The outer surface of the rear deflector 2 has a shape along the upper rear corner portion 6 of the vehicle body 1 as a whole. Then, the air flowing along the upper surface of the vehicle body 1 when the vehicle is traveling is passed through the rear deflector 2
The air flow path 5 inside the car and the rear deflector 2
And the air is rectified in the upper rear corner portion 6 of the vehicle body 1.

(Problems to be solved by the invention) However, since the above-described conventional rear deflector 2 has a shape along the upper rear corner portion 6 of the vehicle body 1, sufficient air rectification is not performed, and the symbol C in FIG. As shown by, there is a problem that turbulent flow is generated in the vicinity of the rear surface 4 and becomes resistance during traveling. Further, as indicated by a symbol D in FIG. 4, this turbulent flow has a problem that dust and muddy water that are rolled up from the lower side during traveling are entrained and adhered to the rear window glass 7, which hinders rearward visibility.

The present invention has been made in view of the above problems, and when applied to a vehicle in which the rear corners of the vehicle body are formed into a substantially rectangular shape, the rear deflector of the vehicle can improve air rectification at the rear of the vehicle. It is intended to provide a structure.

(Means for Solving the Problems) In order to achieve the above object, a rear deflector structure in an automobile of the present invention is arranged by forming an air flow path between the rear deflector structure in the rear part of a vehicle body and an upper rear corner part thereof. An upper wall portion having an upper collar piece formed continuously at the rear end of the upper surface, and extending from both ends of the upper wall portion so as to be substantially flush with the side surface of the vehicle body and covering a lateral rear corner portion in the rear portion of the vehicle body. And a pair of side wall parts having side flange pieces formed at the rear end thereof, and the outer surface shape of the upper wall part including the upper flange piece has a curvature larger than the curvature of the upper rear corner portion. As shown in the figure, it has a streamlined shape that flows to the lower rear of the vehicle body, and a streamlined shape that flows to the inner rear of the vehicle body so that the outer surface shape of both side walls, including the side flange pieces, has a greater curvature than the curvature of the lateral rear corners. None, reflow from the air flow path to the upper collar piece This is a structure in which the vertical cross section of the yade deflector is formed in a shape that widens toward the end.

(Operation) According to the present invention, the air flowing on the upper surface of the vehicle body is smoothly guided in the direction away from the rear surface of the vehicle body by being guided to the upper wall portion of the streamline flowing to the lower rear of the vehicle body. Further, the air flowing on the side surface of the vehicle body is also guided by the streamlined side wall portion flowing inward rearward, and smoothly flows in a direction away from the rear surface of the vehicle body. Therefore, the turbulent airflow generated in the vicinity of the rear surface of the vehicle body is reduced, the air resistance of the rear portion of the vehicle body is reduced, and at the same time, the amount of dust or muddy water that is rolled up from the lower side of the vehicle body is also reduced.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of a rear deflector structure in an automobile according to an embodiment of the present invention, and FIG. 2 is an A- of FIG.
FIG. 3 is a sectional view of the structure shown in FIG.
It is sectional drawing of the structure same as the above along a line.

1 to 3, a vehicle body 11 in which the rear deflector 10 is attached to an upper rear portion is shown by a chain double-dashed line, and the vehicle body 11 is an example of a bus vehicle body. The vehicle body 11 has an upper rear corner portion 14 which is a boundary portion between the vehicle body upper surface 12 and the vehicle body rear surface 13, and a lateral rear corner portion 16 which is a boundary portion between the vehicle body side surface 15 and the vehicle body rear surface 13, each having a substantially rectangular shape. , It has a box shape as a whole.

On the other hand, the rear deflector 10 includes an upper wall portion 17 and a pair of side wall portions 1 bent downward from both ends of the upper wall portion 17.
8 is integrally formed with a synthetic resin material. The rear deflector 10 is integrated with a garnish (not shown) or the like and is attached to the vehicle body 11 in a state where the side wall portion 18 is in close contact with the vehicle body 11 so as to have a sense of unity with the vehicle body 11. Further, when the side wall portion 18 is attached, the upper wall portion 17 is also arranged in a state in which a gap is formed between the upper wall portion 17 and the vehicle body 11 to form the air flow path 19. A portion 20 of the upper wall portion 17 along the vehicle body upper surface 12 is formed to be relatively thin, and a portion 2 that is continuous from the portion 20 and covers the upper rear corner portion 14 and extends rearward.
1 gradually becomes thicker toward the rear.
Further, a thin upper brim piece 22 extending further rearward and downward is integrally formed at the end of the portion 21.
The outer surface shape formed by the upper brim piece 22 has a curvature sufficiently larger than that of the upper rear corner portion 14. Then, the upper wall portion 17 connected by the portions 20 and 21 and the upper collar piece 22.
The entire outer surface of the vehicle has a streamlined shape in which a tail is drawn to the lower rear of the vehicle body 11. Further, the rear end of the portion 21 is provided with the vehicle body 1 in a state of being scattered below the upper collar piece 22.
A lamp mounting recess 24 is provided for disposing a plurality of marker lamps 23 mounted along the width direction of the lamp 1.

On the other hand, the side wall portion 18 of the rear deflector 10 is provided with a notch 25 cut from the lower side, and when the rear deflector 10 is attached to the rear portion of the vehicle body 11, the notch 25 projects the side surface 15 of the vehicle body. The rear deflector 10 is positioned in the front-rear direction with respect to the vehicle body 11 by receiving the portion 26. Further, when the rear deflector 10 is attached to the vehicle body 11, the side wall portion 1
The outer surface of 8 and the surface of the protruding portion 26 are configured to be substantially flush with each other. Further, in the side wall portion 18, the outer surface shape of the side brim piece 30 which covers the lateral rear corner portion 16 and extends rearward is formed with a curvature sufficiently larger than the curvature of the lateral rear corner portion 16, and the entire outer surface of the side wall portion 18 is formed. The shape is a streamline that flows in a state of pulling a tail toward the inside rear of the vehicle body 11.

When the rear deflector 10 configured as described above is attached to an automobile and used, the air flowing along the upper surface 12 of the vehicle during traveling travels to the vehicle body 11 at the rear portion of the vehicle body 11 as indicated by the arrows in FIG. It flows in the air flow path 19 between the upper wall portion 17 and the upper surface of the upper wall portion 17. That is, the air flowing in the air flow path 19 flows in a state of wiping over the rear window glass 28, and the air flowing along the upper surface of the upper wall portion 17 is rectified by the streamline shape on the outer surface of the upper wall portion 17. Flows to the lower rear of the vehicle body 11.
On the other hand, the air flowing along the side surface 15 of the vehicle body is provided with the side wall portion 1 at the rear portion of the vehicle body 11 as shown by the flow path by the arrow in FIG.
It is rectified by the streamlined shape on the outer surface of 8 and flows rearward inside the vehicle body 11. Therefore, both the air flowing on the outer surface of the upper wall portion 17 and the air flowing on the outer surface of the side wall portion 18 are both rectified and guided to the rear of the vehicle body 11, and at the same time, the surface flow of the cavitation region indicated by the symbol E in FIGS. The turbulent flow in the vicinity of the rear surface 13 of the vehicle body is reduced because the air is guided rearward.
Further, dust and muddy water that are wound up from the lower side are also guided by the air flowing rearward and pushed out at the same time rearward, so that they are not caught in the rear surface 13 of the vehicle body. As a result, air resistance is reduced, and fuel economy is improved and stable maneuverability is obtained. Further, the rear window glass 28 is also less contaminated, and the rear visibility can be improved. Further, the appearance can be improved by accommodating the marker lamp 23 integrally in the rear portion of the rear deflector 10.

According to the experimental results, the air resistance in the rear portion of the vehicle body 11 has a resistance coefficient of (0.58) when the conventional rear deflector shown in FIG. 4 is attached, whereas the rear deflector structure according to the present invention has a structure. When applied, the resistance coefficient was (about 0.52) and decreased by about 10%.

In the above embodiment, the rear deflector structure applied to the vehicle body 11 of the bus has been described as an example, but the same applies to a vehicle body whose rear corner portion has a substantially rectangular shape, such as a wagon vehicle, without being limited to the bus. It is possible to obtain various effects.

(Effects of the Invention) As described above, according to the rear deflector structure for a vehicle according to the present invention, the air in the rear part of the vehicle body is rectified to the rear of the vehicle body and smoothly flows, and the turbulent flow generated in the rear portion of the vehicle body is reduced. Air resistance is reduced. Therefore, fuel efficiency is improved and maneuverability is also improved. Furthermore, the amount of air entrained in the rear surface of the vehicle body is reduced and the dirt and muddy water adhering to the rear windshield is reduced, so that rear visibility is always ensured and safety is improved.

[Brief description of drawings]

FIG. 1 is an external perspective view of a rear deflector structure in an automobile according to an embodiment of the present invention, and FIG. 2 is an AA of FIG.
FIG. 3 is a sectional view of the structure shown in FIG. 1 taken along the line BB, and FIG. 4 is a sectional view showing an example of a rear deflector structure in a conventional automobile. It is a schematic block diagram. 2,10 …… Rear deflector, 1,11 …… Car body,
3,12 …… Vehicle body upper surface, 4,13 …… Vehicle body rear surface, 6,1
4 ... upper rear corner of vehicle body, 15 ... side surface of vehicle body, 1
6 ... side rear corner of vehicle body, 17 ... upper wall, 18
...... Side wall part, 5, 19 ...... Air flow path, 22 ...... Upper collar piece,
30 ... Side brim piece.

Claims (1)

[Scope of utility model registration request] 1. An upper rear corner at a rear portion of a vehicle body in which an upper rear corner portion serving as a boundary portion between an upper surface and a rear surface and a lateral rear corner portion serving as a boundary portion between a side surface and the rear surface are substantially rectangular. A rear deflector structure for an automobile, which is mounted by forming an air flow path between itself and a portion thereof, is formed so as to form the air flow path, covers the upper rear corner portion, and is continuously formed at a rear end of an upper surface thereof. An upper wall portion having an upper flange piece formed thereon, extending from both ends of the upper wall portion so as to be substantially flush with the side surface, arranged to cover the lateral rear corner portion, and formed at a rear end thereof. A pair of side wall portions having side flange pieces,
The outer wall shape of the upper wall portion including the upper flange piece is streamlined so as to flow downward and rearward of the vehicle body so that the outer wall shape of the upper wall portion has a curvature larger than that of the upper rear corner portion. The rear deflector extending from the air flow path to the upper flange piece has a streamlined shape that flows rearward inward of the vehicle body so that the outer surface shape including the side flange piece has a curvature larger than that of the lateral rear corner portion. A rear deflector structure for an automobile, characterized in that the vertical cross section of the vehicle is formed in a divergent shape.