JP7334197B2 - vehicle rear structure - Google Patents

Description

The present invention relates to a vehicle rear structure with a rear bumper.

In order to improve the aerodynamic characteristics of the vehicle, various measures have been taken in the rear portion of the vehicle as well.

For example, in Patent Document 1, the vehicle rear fender is designed to be rounded from the side to the rear of the vehicle, and the running wind flowing along the side of the vehicle is directed toward the rear of the vehicle without being separated, while the fender smoothly bulges substantially vertically. By providing the rear combination lamps extending in the right and left directions on the left and right sides of the rear surface of the vehicle, the rear combination lamps are made to stand up against the traveling wind that is going to move from the side surface of the vehicle to the rear surface of the vehicle as described above, and the air pressure at the rear surface of the vehicle is increased more than necessary. is disclosed.

By the way, when the vehicle is running, the airflow blown out from the rear wheel house does not flow along the side of the vehicle, but flows rearward in a turbulent manner, which causes deterioration of the aerodynamic characteristics of the vehicle. In the configuration disclosed in Patent Document 1, the rear combination lamp is clearly above the upper edge of the rear wheel house, and the problem of deterioration of aerodynamic characteristics due to the airflow blowing out from the rear wheel house cannot be addressed.

Japanese Patent No. 5704403

SUMMARY OF THE INVENTION The present invention has been devised under the circumstances described above, and provides a vehicle rear portion structure capable of improving the aerodynamic characteristics of the vehicle by suppressing the influence of air currents blowing out from the rear wheel house during running. That is the issue.

In order to solve the above problems, the present invention employs the following technical means.

That is, in the vehicle rear portion structure provided by the present invention, at the left and right corner portions of the rear portion of the vehicle, plate-shaped projecting portions projecting rearward of the vehicle and extending in the vertical direction are formed in the vehicle width direction regions of the left and right corner portions. The outer surface of the projecting portion in the vehicle width direction is inclined inward in the vehicle width direction toward the rear.

Preferably, the projecting portion is formed in a height direction range partially or wholly overlapped with the vertical height range of the rear wheel house opening.

According to the vehicle rear portion structure having the above configuration, the distance from the rear end of the rear wheel house opening to the rear end of the projecting portion is a length necessary for the airflow blowing out from the rear wheel house opening during running to reattach and be rectified. extended to By rectifying in this way, the influence of the airflow blowing out from the rear wheel house opening is reduced, and the aerodynamic characteristics of the vehicle are improved.

In addition, since the outer surface of the protrusion in the vehicle width direction is inclined inward in the vehicle width direction toward the rear, the extension from the rear end of the rear wheel house opening to the rear end of the protrusion as described above The airflow rectified by the curved outer surface of the vehicle is pushed inward in the vehicle width direction at the rear of the vehicle. This reduces the scale of the vortex generated behind the vehicle, weakening the negative pressure generated at the rear of the vehicle, which also contributes to the improvement of the aerodynamic characteristics of the vehicle.

Other features and advantages of the invention will become more apparent from the detailed description that follows with reference to the drawings.

1 is a right side view of a rear portion of a vehicle to which a vehicle rear portion structure according to the present invention is applied; FIG. FIG. 2 is a left rear view of the vehicle shown in FIG. 1; FIG. 2 is a schematic cross-sectional view along line III-III in FIG. 1;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings. In these figures, the front is fr, the rear is rr, the left is lh, and the right is rh.

FIG. 1 is a right side view of the rear portion of a vehicle 100 to which the vehicle rear portion structure according to the present invention is applied. 2 is a left rear view of the vehicle shown in FIG. 1. FIG. FIG. 3 is a schematic cross-sectional view along line III-III in FIG.

A rear end portion of the vehicle 100 includes a trunk lid 110 , a rear fender 120 beside the trunk lid 110 , and a rear bumper 200 . In the illustrated embodiment, the rear bumper 200 is arranged such that the trunk lid 110, the rear fender 120, and the outer surface are integrated. Rear bumper 200 extends in the vehicle width direction as a whole and has left and right corner portions 210 . The left and right corner portions 210 of the rear bumper 200 are displaced forward as the outer surfaces thereof extend outward in the vehicle width direction to form bumper side portions 220 . A front end 221 of the bumper side portion 220 cooperates with the lower edge 121 of the rear fender 120 to form an opening 310 of the rear wheel house 300 . Rear bumper 200 is generally a molded resin product.

In the present invention, plate-like projecting portions 400 are provided at the left and right corner portions 210 of the rear portion of the vehicle, projecting rearward of the vehicle and extending in the vertical direction. In this embodiment, since the upper end of the bumper side portion 220 extends to the trunk lid 110 , the projecting portion 400 is formed on the rear bumper 200 . The projecting portion 400 may be formed integrally with the rear bumper 200, but in the present embodiment, it is formed separately from the rear bumper 200 and attached by fixing means such as adhesion. The configuration of the projecting portion 400 will be described in more detail below.

Although the vertical length T of the projecting portion 400 may be arbitrary, it is preferable to have a vertical length of 20 mm or more. However, it is desirable that the protruding portion 400 is formed in a height direction range in which a part or a front portion thereof overlaps with the vertical height range of the opening 310 of the rear wheel house 300. As possible, the protrusion 400 is formed so as to be entirely within the height direction range of the opening 310 of the rear wheel house 300 . The rearward projection length L of the projection 400 may be set arbitrarily within a range that does not project further rearward than the rear end of the rear bumper 200 . The rear projection length L is 50 mm or more, more preferably 100 mm or more and 200 mm or less.

As clearly shown in FIG. 3, the outer surface 410 of the projecting portion 400 in the vehicle width direction is substantially integrally continuous with the bumper side surface portion 220 that is inclined inward in the vehicle width direction toward the rear. is formed as In this embodiment, the outer surface 410 of the protruding portion 400 is formed so as to incline further inward in the vehicle width direction with respect to the bumper side portion 220 . The angle θ of the outer surface 410 of the projecting portion 400 with respect to the vehicle front-rear direction is set within a range of 5° or more and 20° or less.

Next, the operation of the vehicle rear portion structure having the above configuration will be described.

As shown in FIG. 3, by providing the projecting portion 400, the length of the vehicle side surface acting as the straightening surface 500 from the rear end of the opening 310 of the rear wheel house 300 to the rear end of the projecting portion 400 is extended. It is extended by the length of the portion 400 . As a result, the airflow f blowing out from the opening 310 of the rear wheel house 300 during running adheres again to the rectifying surface 500 and is rectified. As a result, the influence of the airflow blowing out from the opening 310 of the rear wheel house 300 is reduced, and the aerodynamic characteristics of the vehicle 100 are improved.

In addition, since the outer surface 410 of the protruding portion 400 is inclined inward in the vehicle width direction toward the rear (inclined at an angle θ), the rear end of the opening 310 of the rear wheel house 300 can be displaced from the rear end of the rear wheel house 300 as described above. The airflow F rectified by the vehicle outer surface (rectifying surface 500) extending to the rear end of the projecting portion 400 is pushed inward in the vehicle width direction behind the vehicle. As a result, the scale of the vortex generated behind the vehicle is reduced, and the negative pressure generated at the rear of the vehicle is weakened. This also contributes to the improvement of the aerodynamic characteristics of the vehicle.

In this embodiment, since the projecting portion 400 is formed separately from the rear bumper 200, the color of the projecting portion 400 may be different from that of the rear bumper 200, for example, to increase the degree of freedom in the exterior design of the vehicle 100. can be enhanced.

Of course, the scope of the present invention is not limited to the above-described embodiments, and all design changes within the scope of matters described in the claims are included in the scope of the present invention.

In this embodiment, the protrusion 400 is provided on the rear bumper 200 . In addition, depending on the vehicle, it is possible to provide the projecting portion 400 on the rear fender 120 or to provide the projecting portion 400 on the corner portion of the tail lamp on the outside in the vehicle width direction.

A1 Rear structure F Traveling wind (airflow)
f Airflow T blowing out from the rear wheel house Vertical length (of the protruding part)
L forward projection length (of projection)
θ angle of outer surface of protrusion with respect to vehicle longitudinal direction 100 vehicle 110 trunk lid 120 rear fender 121 lower edge (of rear fender)
200 rear bumper 210 corner part (of rear bumper)
220 bumper side 221 rear end (of bumper side)
300 Rear wheel house 310 Opening (of rear wheel house)
400 protrusion 410 outer surface (of protrusion)
500 rectifying surface

Claims (1)

At the rear left and right corners of a vehicle with a trunk,
A plate-like projecting portion that projects rearward of the vehicle and extends vertically in a height direction range that partially or wholly overlaps the vertical height range of the rear wheel house opening in the vehicle width direction region of the left and right corner portions. is formed and
The outer surface of the projecting portion in the vehicle width direction is inclined inward in the vehicle width direction toward the rear, and is inclined inward in the vehicle width direction toward the rear from the outer surface of the rear bumper. A vehicle rear structure characterized by being integrally continuous .

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