JP6721461B2 - Bumper diffuser - Google Patents

Description

The present invention relates to a bumper diffuser arranged on a rear bumper, and more particularly to a bumper diffuser with improved design from the rear of a vehicle.

The following Patent Document 1 describes a bumper-integrated diffuser structure. In this bumper-integrated diffuser structure, the diffuser is formed integrally with the bumper arranged at the rear of the vehicle body, and the exhaust gas emitted from the engine is discharged toward the rear of the vehicle body via the muffler and diffuser. To be done.

Further, Patent Document 1 describes a configuration for preventing the road surface from being seen through the diffuser. Specifically, a part of the tubular portion forming the diffuser is an extension surface extended to the muffler body side, and this extension surface is arranged in the lower portion of the muffler body. This prevents the diffuser from seeing the road surface when looking through the opening of the diffuser from the rear.

Japanese Patent No. 477033

However, in the bumper-integrated diffuser structure described in Patent Document 1 described above, the extending surface of the diffuser is arranged in the lower portion of the muffler body. Therefore, when the muffler main body and the diffuser approach each other or when the amount of movement of the muffler main body is large, there is a risk that they will contact each other, and there is a risk that an effective extension surface cannot be provided. If an effective extension surface is not provided, the ground can be seen from the rear through the diffuser, which may deteriorate the appearance quality of the diffuser and eventually the vehicle as a whole.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a bumper diffuser having a simple structure and improved designability.

The present invention is a bumper diffuser which is attached to a rear bumper of a vehicle and through which exhaust gas emitted from a muffler to the outside of the vehicle passes, and which is formed behind a tail pipe formed at a rearmost portion of the muffler, and the tail of the muffler is provided. A tubular portion through which the exhaust gas discharged from the pipe passes, and a tubular portion disposed inside the tubular portion, arranged along the flow of the exhaust gas discharged from the tail pipe, and from the rear of the vehicle. A plate-shaped member that blocks a line of sight toward the ground through the tubular portion, the rear upper end portion of the tubular portion being disposed rearward of the rear lower end portion of the rear bumper, and the tubular shape An imaginary line connecting the rear upper end and the rear lower end of the portion extends toward the rear side with respect to the rear lower end of the rear bumper, and the imaginary line is an inclined line that slopes rearward upward. A front end of the plate-shaped member is disposed on a front side of a front end of an eyeline that connects a rear upper end of the tubular part and a front lower end of the tubular part, and a rear end of the plate-shaped member. The portion is arranged rearward of the rear end of the eyeline, and the front lower end portion of the tubular portion is rearward of the front end of the eyeline .

Further, in the bumper diffuser of the present invention, the tubular portion and the rear bumper are separated from each other.

Further, in the bumper diffuser of the present invention, the plate-shaped member is arranged behind the center of the rear end of the tail pipe.

Further, in the bumper diffuser of the present invention, a rear end portion of the plate-shaped member extends to a vicinity of a rear end portion of the tubular portion.

The present invention is a bumper diffuser which is attached to a rear bumper of a vehicle and through which exhaust gas emitted from a muffler to the outside of the vehicle passes, and which is formed behind a tail pipe formed at a rearmost portion of the muffler, and the tail of the muffler is provided. A tubular portion through which the exhaust gas discharged from the pipe passes, and a tubular portion disposed inside the tubular portion, arranged along the flow of the exhaust gas discharged from the tail pipe, and from the rear of the vehicle. A plate-shaped member that blocks a line of sight toward the ground through the tubular portion, the rear upper end portion of the tubular portion being disposed rearward of the rear lower end portion of the rear bumper, and the tubular shape An imaginary line connecting the rear upper end and the rear lower end of the portion extends toward the rear side with respect to the rear lower end of the rear bumper, and the imaginary line is an inclined line that slopes rearward upward. A front end of the plate-shaped member is disposed on a front side of a front end of an eyeline that connects a rear upper end of the tubular part and a front lower end of the tubular part, and a rear end of the plate-shaped member. The portion is arranged rearward of the rear end of the eyeline, and the front lower end portion of the tubular portion is rearward of the front end of the eyeline . Therefore, even when a bumper diffuser having a tubular portion that allows exhaust gas to flow is formed in the rear bumper, the line of sight to the ground via the tubular portion can be blocked by the plate member, so that the tubular portion can be removed from the rear of the vehicle. It is possible to prevent the design from being deteriorated due to the ground being seen through. Furthermore, by disposing the plate-shaped member along the flow of the exhaust gas discharged from the tail pipe, it is possible to prevent the plate-shaped member from obstructing the flow of the exhaust gas.

Further, in the bumper diffuser of the present invention, the tubular portion and the rear bumper are separated from each other. Therefore, by separating the tubular portion and the rear bumper from each other, it is possible to prevent the heat of the exhaust gas from being conducted to the rear bumper via the tubular portion.

Further, in the bumper diffuser of the present invention, the plate-shaped member is arranged behind the center of the rear end of the tail pipe. Therefore, about half of the exhaust gas discharged from the tail pipe passes above the plate-shaped member, and the other half passes below the plate-shaped member, so that the emission noise of the exhaust gas is reduced. You can

Further, in the bumper diffuser of the present invention, a rear end portion of the plate-shaped member extends to a vicinity of a rear end portion of the tubular portion. Therefore, since the plate-shaped member can be elongated in the direction along the flow of the exhaust gas, the flow of the exhaust gas can be rectified.

1 is a perspective view showing a rear portion of a vehicle to which a bumper diffuser according to an embodiment of the present invention is attached. It is a cross-sectional side view which shows the bumper diffuser and its periphery concerning one Embodiment of this invention. It is a figure which shows the bumper diffuser concerning one Embodiment of this invention, (A) is a cross-sectional side view which shows the bumper diffuser periphery, (B) is the figure which looked at the bumper diffuser from the back.

Hereinafter, a bumper diffuser 13 according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, in principle, the same reference numerals are used for the same members, and repeated description is omitted. Further, in the following description, the up, down, front, back, left, and right directions will be described.

FIG. 1 is a perspective view showing a rear end portion of a vehicle 10 in which a bumper diffuser 13 of this embodiment is arranged. Referring to FIG. 1, a rear bumper 11 is provided at a lower rear portion of vehicle 10. The rear bumper 11 is a member for cushioning the impact, and is a long member made of a synthetic resin or the like formed in a plate shape and having a longitudinal direction along the vehicle width direction of the vehicle 10.

A concave portion 18 is formed by partially making the lower left portion of the rear bumper 11 concave, and the bumper diffuser 13 is arranged in the concave portion 18.

The bumper diffuser 13 is arranged integrally with the rear bumper 11 behind a muffler (not shown). The shape of the bumper diffuser 13 when viewed from the rear is a circle, an ellipse, or a substantially ellipse. Exhaust gas generated when the engine that gives the driving force to the vehicle 10 operates is discharged to the outside via a muffler and a bumper diffuser 13 (not shown).

Since the bumper diffuser 13 is formed integrally with the rear bumper 11, by fixing the relative positions of the bumper diffuser 13 and the rear bumper 11, the design around the bumper diffuser 13 can be improved. A louver 16 is formed inside the bumper diffuser 13. The louver 16 is a plate-shaped member for preventing the ground from being visually recognized via the bumper diffuser 13, and its specific shape will be described later with reference to FIG. Here, the bumper diffuser 13 may be referred to as a muffler cutter.

The configuration of the bumper diffuser 13 and its surroundings will be described in detail with reference to FIGS. 2 and 3.

FIG. 2 is a sectional side view showing the configuration of the bumper diffuser 13 and its surroundings. The bumper diffuser 13 is mainly composed of a tubular portion 15 having a central axis extending in the front-rear direction, and a louver 16 arranged inside the tubular portion 15. The bumper diffuser 13 is attached to the vehicle body side of the vehicle 10 via a bracket or the like not shown here.

The muffler 12 is arranged in front of the bumper diffuser 13. The tail pipe 14 formed at the rear end of the muffler 12 is arranged immediately in front of the bumper diffuser 13.

The tubular portion 15 is made of a plate-shaped material such as a steel plate, and has a front opening 23 that opens forward and a rear opening 24 that opens rearward. The tubular portion 15 has a shape in which the width becomes narrower toward the rear in order to collect exhaust gas discharged from the muffler 12 and discharge the exhaust gas rearward.

The front lower end portion 26 of the tubular portion 15 extends forward of the front upper end portion 25. In this embodiment, since the louver 16 blocks the eyeline 20 from the rear as described later, it is not necessary to excessively extend the front lower end portion 26 forward in order to ensure design. Therefore, the distance between the front lower end portion 26 of the bumper diffuser 13 and the muffler 12 can be sufficiently long. Therefore, even when the amount of movement of the muffler 12 during traveling is large, it is possible to prevent the muffler 12 and the bumper diffuser 13 from interfering with each other even if the muffler 12 has a large diameter.

The rear end portion of the bumper diffuser 13 is folded back 180 degrees toward the front. Further, the rear end portion of the bumper diffuser 13 is not in close contact with the rear bumper 11, but a gap 17 is formed between the rear end portion of the bumper diffuser 13 and the rear bumper 11. From this, even if the temperature of the bumper diffuser 13 rises due to the passage of exhaust gas, the bumper diffuser 13 and the rear bumper 11 are separated from each other, so that heat is transferred from the bumper diffuser 13 to the rear bumper 11 excessively. It is never heated. Therefore, deterioration of the rear bumper 11 due to heating is suppressed. Further, by forming the gap 17 between the rear end portion of the bumper diffuser 13 and the rear bumper 11, the bumper diffuser 13 can have an appearance like a component separated from the rear bumper 11.

The rear portion of the bumper diffuser 13 has a substantially cylindrical shape or a substantially elliptic cylindrical shape, and the louver 16 is built in this portion. The louver 16 is made of, for example, a metal plate, and is fixed inside the bumper diffuser 13 by welding, caulking, fitting, or the like. The louver 16 is arranged in the central portion of the bumper diffuser 13 in the vertical direction, and is further laid horizontally so that its main surface is parallel to the horizontal plane.

The front end of the louver 16 extends forward of the eyeline 20 that connects the front lower end 26 and the rear upper end 33 of the bumper diffuser 13. Here, the eyeline 20 is a range of a line of sight from the rear of the vehicle 10 toward the ground through the rear opening 24 of the bumper diffuser 13, and in this figure, the eyeline 20 is defined as a region sandwiched by a chain line. Showing. On the other hand, the rear end of the louver 16 extends to the rear end of the tubular portion 15 or the vicinity thereof. As a result, the line of sight from the vehicle 10 that passes through the bumper diffuser 13 toward the ground is blocked by the louver 16, and the ground is visually recognized via the bumper diffuser 13 to prevent deterioration of the design of the bumper diffuser 13. it can. Furthermore, since the length of the bumper diffuser 13 along the front-rear direction can be increased, the exhaust gas can be rectified by the bumper diffuser 13 and the generation of jet noise due to the exhaust gas can be suppressed.

When the tail pipe 14 has a large diameter of, for example, 10 cm or more, the bumper diffuser 13 also has a large diameter, and the ground can be easily seen from behind the vehicle 10 through the bumper diffuser 13. Even in the case of such a large diameter, in the present embodiment, since the line of sight is blocked by the louver 16 inside the bumper diffuser 13, it is possible to prevent the ground from being seen from behind via the bumper diffuser 13.

Further, since it is not necessary to excessively extend the front lower end portion 26 of the bumper diffuser 13 to the front in order to block the line of sight described above, even when the tail pipe 14 has a large diameter, the tail pipe 14 and the bumper diffuser 13 cannot be extended. The diffuser 13 and the diffuser 13 can be sufficiently separated from each other to prevent them from coming into contact with each other.

The configuration of the bumper diffuser 13 will be further described with reference to FIG. 3A is a side sectional view showing the bumper diffuser 13 and its peripheral portion, and FIG. 3B is a view of the bumper diffuser 13 as seen from the rear.

With reference to FIG. 3(A), a virtual line 31 connecting the rear upper end portion 33 and the rear lower end portion 34 of the bumper diffuser 13 is an inclined line that is inclined rearward toward the upper side. In this way, the rear end portion of the bumper diffuser 13 is formed in an inclined shape to match the inclined shape of the rear bumper 11, and the rear end portion of the bumper diffuser 13 is prevented from protruding rearward excessively.

The louver 16 is arranged at a position overlapping the center line 30 of the tail pipe 14 or in the vicinity thereof. Further, the center line 30 of the tail pipe 14 and the center of the tubular portion 15 of the bumper diffuser 13 in the vertical direction substantially coincide with each other. Therefore, about half of the exhaust gas discharged rearward from the tail pipe 14 passes inside the bumper diffuser 13 above the louver 16. The remaining approximately half of the exhaust gas passes through the inside of the bumper diffuser 13 below the louver 16. Therefore, since the environment in which the exhaust gas flows is substantially equal in the upper portion and the lower portion of the louver 16, it is possible to further suppress the generation of jet noise due to the exhaust gas.

Furthermore, in this embodiment, the louver 16 is a flat plate having a thickness of 1.0 mm or less. By forming the louver 16 from a thin flat plate in this manner, the exhaust gas flows well along the louver 16, and the pressure loss due to the existence of the louver 16 in the flow path of the exhaust gas can be reduced. ..

Further, the color of the louver 16 may be a bright color such as yellow or red in order to emphasize its existence and exert a design effect, or a dark color such as black or gray in order to hide its existence. It may be.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

Referring to FIG. 1, only one bumper diffuser 13 is formed at the left end portion of the rear bumper 11 in the above-described embodiment, but the bumper diffuser 13 is formed at the center portion, the right end portion, or the left and right portions of the rear bumper 11. A plurality may be provided at both ends.

With reference to FIG. 2, one louver 16 is formed in the bumper diffuser 13 in the above-described embodiment, but a plurality of louvers 16 may be formed in the vertical direction to enhance the effect of blocking the line of sight.

10 vehicle 11 rear bumper 12 muffler 13 bumper diffuser 14 tail pipe 15 tubular portion 16 louver 17 gap 18 concave portion 20 eyeline 23 front opening 24 rear opening 25 front upper end 26 front lower end 30 center line 31 virtual line 33 rear upper end 34 Rear lower end

Claims (4)

It is a bumper diffuser that is attached to the rear bumper of the vehicle and through which exhaust gas emitted from the muffler to the outside of the vehicle passes,
A tubular portion formed behind a tail pipe formed at the rearmost portion of the muffler, through which the exhaust gas discharged from the tail pipe of the muffler passes,
A plate-like member that is disposed inside the tubular portion and that is arranged along the flow of the exhaust gas discharged from the tail pipe and that blocks the line of sight from the rear of the vehicle toward the ground via the tubular portion. And a member,
The rear upper end of the tubular portion is arranged rearward of the rear lower end of the rear bumper,
An imaginary line connecting the rear upper end and the rear lower end of the tubular portion extends toward the rear side with respect to the rear lower end of the rear bumper, and the imaginary line inclines rearward toward the upper side. A line,
The front end of the plate-shaped member is arranged on the front side of the front end of the eyeline that connects the rear upper end of the tubular part and the front lower end of the tubular part,
The rear end of the plate-shaped member is arranged rearward of the rear end of the eyeline,
The bumper diffuser is characterized in that a front lower end portion of the tubular portion is arranged rearward of a front end of the eyeline . The bumper diffuser according to claim 1, wherein the tubular portion and the rear bumper are separated from each other. The bumper diffuser according to claim 1 or 2, wherein the plate-shaped member is disposed behind a center of a rear end of the tail pipe. The bumper diffuser according to any one of claims 1 to 3, wherein a rear end portion of the plate-shaped member extends to a vicinity of a rear end portion of the tubular portion.

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