JP2576734Y2 - One-box car front bumper structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a front bumper in a one-box car.

[0002]

Particularly important items when the Prior Art Generally in considering the aerodynamic characteristics of the minivan, at high speeds, air resistance coefficient acting on the vehicle, i.e., of course it is there necessary to reduce the C _D value Also, it is necessary to reduce the crosswind characteristics of the vehicle, that is, the yawing moment coefficient = C _Y value, so that the vehicle does not fluctuate even when receiving the crosswind during high-speed running.

In recent years, even in one-box cars, those having a round body shape have become the mainstream. When the body shape is round as described above, the above-mentioned air resistance coefficient = _CD value Even when the vehicle is running, the air acting on the front surface of the front body flows along the body outer surface of the front side during traveling of the vehicle, and the negative pressure acting on the front side increases. There is a problem that the moment coefficient = C _Y value becomes high.

[0004]

In the one-box car, the yawing moment coefficient = C _Y
As a method of reducing the value, for example, Japanese Unexamined Patent Publication No.
As shown in Japanese Patent Publication No. 4 (1999) -2004, there is also a device in which an air spoiler separately formed is assembled to a front bumper, and the air flow on the front side of the body is controlled by the rectifying action of the air spoiler. However, with the above structure, it is necessary to separately prepare the air spoiler, so that assembling time and the number of parts are increased, and the design of the vehicle body is limited.

The present invention has been developed in view of the above-mentioned circumstances. Usually, the present invention focuses on the fact that a lamp mounting hole such as a turn lamp or a parking lamp is formed on both sides of a front bumper. By effectively utilizing the lamp incorporated in the installation hole, the yawing moment coefficient = C _Y value can be reduced without deteriorating the air resistance coefficient = C _D value without separately mounting an air spoiler or the like as in the related art. There is a front bumper.

[0006]

SUMMARY OF THE INVENTION The present invention provides a front bumper of a one-box car by providing front and rear lamp mounting holes 3 and 30 at both ends of the bumper 2 in the vehicle width direction. The front side of the lamps 4, 40 to be incorporated into the holes 3, 30 is arranged such that the outer side in the vehicle width direction is located behind the front side of the bumper 2, and the inner edge in the vehicle width direction is substantially flush with the front side of the bumper 2. So that the outer side in the vehicle width direction is located rearward of the inner side in the vehicle width direction so as to be aligned with the vehicle width direction in the lamp mounting holes 3 and 30. The outer inner side surface has an aero kick surface 6.60 that separates the air flow on the leeward side of the bumper 2 outward from the bumper 2 in the vehicle width direction.

[0007]

According to the present invention, the aerodynamic surfaces 6.60 are formed by the existing components of the lamp mounting holes 3.30 provided in the bumper 2 and the lamps 4.40 incorporated in the mounting holes 3.30. Therefore, the bumper 2
The yaw moment coefficient can be reduced without projecting the both ends in the width direction of the vehicle forward from the center thereof, and without separately attaching an air spoiler or the like. Since the outer side in the vehicle width direction is inclined so as to be located rearward of the inner side in the vehicle width direction, air is generated by the lamps 4.40.
Front to flow smoothly toward the vehicle width direction inner side in the vehicle width direction outer side, it is not caused the deterioration of the C _D value.

[0008]

FIG. 1 shows a front part of a body of a one-box car, in which a front bumper 2 according to the present invention is disposed below a front part of a front body 1. FIG.

The front bumper 2 has a bumper main body 21 extending in the vehicle width direction below a front surface of the front body 1, and is bent rearward from both ends of the bumper main body 21.
The front body 1 is made of synthetic resin and includes a bumper side 22 along the front side.

In the front bumper 2 having the above-described structure, in the embodiment shown in the drawing, the lower portion of both ends in the longitudinal direction of the bumper main body 21 is recessed rearward, and a substantially rectangular front view opening toward the front of the vehicle. And a bottom wall 31 of the mounting hole 3 is provided with an insertion hole 32 for inserting a bulb 41 of the lamp 4 described later.

A fog lamp 4 used as an auxiliary lamp is provided in the mounting hole 3 and a lamp housing 42 of the lamp 4 is fixed to the bottom wall 31 via a bolt 43. The front side and the outer side in the vehicle width direction are arranged behind the front side of the bumper main body 21, and the inner edge in the vehicle width direction is connected to the bumper main body 21.
The front surface of the lamp housing 42 is provided with a recess 5 having a depth gradually increasing toward the outside in the vehicle width direction by being disposed substantially flush with the front surface of the lamp housing 42. The inner surface of the housing 42 at the front outside in the vehicle width direction is defined as an aero kick surface 6, and the aero kick surface 6
The flow of air that is to flow from the front surface of the bumper body 21 along the bumper side 22 is separated from the bumper side 22 outward in the vehicle width direction.

In the above structure, the mounting hole 3
Has a vertical length of 100 mm and a vehicle width direction length of 14 mm.
The depth of the recess 5 near the aero kick surface 6 is 15 mm.

When the vehicle with the front bumper mounted thereon travels, the air flowing through the front of the vehicle and passing through the recess 5 in front of the lamp 4 is, as shown by an arrow X in FIG. After smoothly flowing from the inner side in the width direction toward the outer side in the vehicle width direction and colliding with the aero kick surface 6, the air flows from the bumper side portion 22 to a position far away from the bumper side portion 22 in the vehicle width direction. The negative pressure acting on the front side of the bumper side portion 22 through the front body 1 is reduced, and the yawing moment coefficient = C _Y value is reduced.

The lamp 4 to be installed in the installation hole 3
Instead of a fog lamp, a driving lamp may be incorporated.

FIG. 4 shows another embodiment, in which a turn signal lamp 40 is further provided above the mounting hole 3 on both longitudinal sides of the bumper body 21.
And a mounting hole 30 for the
The aero kick surface 60 is provided on the inner surface on the outside in the vehicle width direction of the recess 50 formed on the front surface of the lamp 40 by incorporating the turn signal lamp 40 into the lamp 40.

The structure of the mounting hole 30 and the structure of mounting the turn signal lamp 40 in the mounting hole 30 are the same as the structure of the mounting hole 3 of the fog lamp 4 and the structure of the lamp 4 in the mounting hole 3. The description is omitted because it is the same as the built-in structure.

The mounting hole 30 of the turn signal lamp 40 shown in FIG.
The length in the vehicle width direction is 140 mm, and the depth near the aero kick surface 60 in the recess 50 is 15 mm.

The following table shows a vehicle A having a front bumper without an aero kick surface and, as shown in FIG. 1 to FIG. As shown in FIG. 4, a vehicle B having a bumper provided with a kick surface 6 and, as shown in FIG.
C _Y acting on each vehicle C having a bumper provided with 0
It is a comparison of measurement results of values as well as C _D value.

The yawing moment coefficient = C _Y value shown in this table is a measurement result when the yaw angle is 30 degrees.

[0020]

[Table 1]

As is clear from the above table, one aero kick surface 6 is provided on each of both sides in the vehicle width direction of the bumper body 21 as compared with the vehicle without the aero kick surface (vehicle A). The thing (vehicle B) has a C _Y value of about 34
In% improved, also those provided Aero kick surfaces 6, 60, respectively upper and lower pair of the vehicle width direction side portions of the bumper body 21 (vehicle C), the C _Y value is improved from about 36.4% On the other hand, the _CD value hardly changes regardless of the formation of the aero kick surface.

[0022]

As described above, the present invention is directed to a front bumper of a one-box car, in which both front and rear ends of the bumper 2 are provided with lamp mounting holes 3.3.
0 and a lamp 4 to be installed in the installation holes 3 and 30.
The front side of the vehicle 40 has a bumper 2 on the outer side in the vehicle width direction.
And the rear edge of the bumper 2 is arranged so that its inner edge in the vehicle width direction is substantially flush with the front surface of the bumper 2. And the air flow in the leeward side of the bumper 2 from the bumper 2 in the vehicle width direction. 5. Aero kick surface that peels outward
60, the flow of air is
Flows through the front of the smoothly toward the outside in the vehicle width direction, without causing a deterioration of the C _D value, by the incorporation holes 3, 30 and the lamp 4-40 incorporated into the built-in hole 3 - 30 without leaving in it Aero kick surface 6 to be formed
60, the both ends in the vehicle width direction of the bumper 2 do not protrude forward from the center thereof, and the leeward side of the bumper 2 can be provided from the front surface of the bumper 2 without separately attaching an air spoiler or the like as in the related art. The air flowing through the vehicle is separated outward in the vehicle width direction from the front side of the front body, and the yawing moment coefficient acting on the vehicle =
Reducing the C _Y value is had reached can be improved cross wind characteristics of the vehicle.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a vehicle equipped with a front bumper according to the present invention.

FIG. 2 is an enlarged sectional view taken along line XX in FIG.

FIG. 3 is an enlarged perspective view of a main part of a front bumper.

FIG. 4 is an enlarged perspective view of a main part of a front bumper showing another embodiment.

[Explanation of symbols]

 2 Front bumper 3.30 Lamp mounting hole 4.40 Lamp 6.60 Aero kick surface

Claims (1)

(57) [Scope of request for utility model registration] In a front bumper of a one-box car, lamp mounting holes (3, 30) opening forward are provided at both ends in the vehicle width direction of the bumper (2), and lamps (4, 40) to be mounted in the mounting holes (3, 30). The front side of the bumper 2 is located rearward of the front side of the bumper 2 in the vehicle width direction.
And the inner edge in the vehicle width direction is the front surface of the bumper 2.
So that it is arranged almost flush with the car
The lamp mounting holes 3.3 are tilted so that the outer side in the width direction is located behind the inner side in the vehicle width direction.
An inside surface on the outside in the vehicle width direction in 0 is an aero kick surface 6.60 that separates an air flow on the leeward side of the bumper 2 from the bumper 2 outward in the vehicle width direction. Car front bumper structure.