JP2018119429A - Exhaust device of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust device of an automobile capable of increasing the degree of freedom on the design of appearance of a muffler cutter in the sight from the rear side of the automobile irrespective of a position of an exhaust release port even while providing smooth release actuation of exhaust.SOLUTION: An exhaust device of an automobile includes: a genuine muffler (10) of which a tip part is opened as an obliquely downward exhaust release port (11); a muffler cutter (M) having a nearly channel-type cross-section of which a tip part is opened backward; and an extension pipe (17) for muffler which connects the genuine muffler and the muffler cutter and has a prescribed length. Therein, the root side of the extension pipe is inserted and fitted to the genuine muffler in the coming-out preventive state, on the other hand, the tip side of the extension pipe is likewise inserted and integrated from a front wall surface(16) of the muffler cutter to a lower wall surface (13) in an obliquely downward penetration state, thereby, the tip part of the extension pipe is opened on a lower wall surface of the muffler cutter as an exhaust release port (18) from the genuine muffler and a tip part which is opened backward, of the muffler cutter is formed so as to make as good an impression as possible, as dummy exhaust release port (15).SELECTED DRAWING: Figure 5

Description

  The present invention relates to an automobile exhaust system, and in particular, from the rear of the automobile by a muffler cutter attached to the front end (rear end) of the muffler without sacrificing the smooth flow of exhaust discharged from the exhaust muffler. It was devised to increase the peculiarity of the appearance design and the degree of freedom in design.

  Recently, in order to prevent the exhaust from being discharged to the rear of the automobile, an increasing number of automobiles emit the exhaust to the ground with the tip portion of the exhaust muffler inclined downward.

  The muffler cutter is attached to the front end (rear end) of the exhaust muffler in order to improve the appearance design seen from the rear of the automobile and to give the design freedom. If a straight type muffler cutter is attached to the tip of the muffler that is inclined downward, the exhaust discharge opening that opens at the tip of the muffler cutter is also inclined downward, so that the appearance design viewed from the rear of the automobile is deteriorated.

  Patent Documents 1 and 2 have been proposed as an improvement measure for such a problem. If Patent Document 1 is cited as a representative example, the muffler cutter (3) is attached to the tip of the exhaust muffler (1). Are pivotally connected so as to be tiltable with respect to the axis of the muffler (1) or to be rotatable around the axis.

JP-A-2005-180200 Japanese Patent No. 4451266

  However, even if the muffler cutter (3) is tilted with respect to the axis of the muffler (1) or rotated around the axis of the muffler (1) in the above configuration of Patent Document 1, the axis of the muffler (1) and the muffler cutter There is no change in the state of crossing the axis of (3). In addition, there is always a space between the top and bottom of the muffler (1) (exhaust discharge port) and the lower wall surface (bottom wall surface) of the muffler cutter (3).

  Therefore, the exhaust from the muffler (1) is discharged rearward from the front end portion of the muffler cutter (3) so that the exhaust once collides with the lower wall surface of the muffler cutter (3) and is refracted. As a result, the impact of the exhaust always concentrates on the same part, and the heat damage to the part causes discoloration and melting of the exterior of the vehicle body near the muffler cutter (3), and other adverse effects, and the durability of the muffler cutter (3) It will also decrease early. Furthermore, there is a risk that the exhaust that collided with the lower wall surface of the muffler cutter (3) blows back to the inside of the car and carbon monoxide enters the car.

  In other words, by attaching the muffler cutter (3) in a horizontal state with the ground to the muffler (1) that faces diagonally downward, even if the appearance design seen from the rear of the car can be improved, the effect is that the flow of exhaust is reduced. It must have been said that it was a fall at the end.

  The present invention aims to drastically solve such problems, and in order to achieve the object, in claim 1, a genuine muffler whose front end portion opens as an obliquely downward exhaust discharge port, and the front end portion faces rearward. It consists of a muffler cutter with an approximately U-shaped cross section that opens, and a muffler extension pipe of a certain length that connects the genuine muffler and the muffler cutter,

  By inserting the root side of the extension pipe into the genuine muffler in a slip-proof state and inserting the tip end side of the extension pipe into the penetrating state obliquely downward from the front wall surface of the muffler cutter,

  The extension pipe's tip is used as an exhaust discharge port from the genuine muffler, and the lower wall surface of the muffler cutter is opened on the muffler cutter. Features.

  In claim 2, the root portion of the muffler extension pipe is attached to the genuine muffler with a plurality of presser bolts, clamp bands, and other fixing tools,

  The fitting surface between the front wall of the muffler cutter and the middle part of the extension pipe inserted here and the fitting surface between the lower wall surface of the muffler cutter and the tip of the extension pipe inserted here were welded respectively. It is characterized by.

  According to claim 3, the opening edge of the exhaust discharge opening that opens to the lower wall surface of the muffler cutter has a certain depth than the opening edge of the dummy exhaust discharge opening that opens to the front end (rear end) of the muffler cutter. It is characterized by being separated forward by a (depth) dimension.

  In claim 4, the entire inner wall surface of the muffler cutter having a substantially U-shaped cross section and the outer peripheral surface of the muffler extension pipe inserted from the front wall surface to the lower wall surface of the muffler cutter are colored in black. .

  According to a fifth aspect of the present invention, the muffler cutter is shaped into a circle, an ellipse, or a square with rounded corners when viewed from the rear of the automobile.

  Further, in claim 6, the muffler cutter is shaped into a circle, an ellipse or a rounded corner when viewed from the rear of the automobile,

  A separate muffler cutter, which is a dummy with the same contour shape without the exhaust discharge port, was installed side by side in the overall glasses form by a connecting bar at a position next to the muffler cutter having the exhaust discharge port from the genuine muffler. It is characterized by.

  According to the configuration of claim 1, the exhaust of the genuine muffler can be discharged from the real exhaust discharge port of the muffler extension pipe downward straight to the ground, and the smooth rectifying effect can be obtained. There is no risk of impairing the performance of the genuine muffler.

  In addition, a muffler cutter whose tip is opened backward as a dummy exhaust outlet is attached and integrated to the tip side of the muffler extension pipe so that the position and direction of the genuine exhaust outlet can be determined. Accordingly, it is possible to provide an exhaust discharge port (dummy) on the appearance design as viewed from the rear of the automobile, and there is an effect that the degree of freedom in design can be obtained.

  In that case, if the structure of Claim 2 is employ | adopted, there exists an effect which can attach a muffler cutter to the genuine muffler of a motor vehicle stably and firmly through the muffler extension pipe of fixed length stably.

  If the structure of Claim 3 is employ | adopted, the real exhaust discharge opening opened to the lower wall surface of a muffler cutter will have a certain depth (depth) rather than the dummy exhaust discharge opening opened backward from the front-end | tip part of a muffler cutter. ) Because of the positional relationship that has entered the inside of the muffler cutter by the dimensions, the dummy exhaust outlet can be impressed as if it were a real one, and it is easy to ensure the appearance design as planned.

  Moreover, if the structure of Claim 4 is employ | adopted, the said effect of Claim 3 can be improved further, and the elegant external appearance design united with the rear bumper of a motor vehicle can be obtained.

  If the structure of Claim 5 is employ | adopted, there exists an effect which can design freely the external appearance design seen from the back of a motor vehicle in relation to a rear bumper.

  Furthermore, if the configuration of claim 6 is adopted, the appearance design seen from the rear of the car becomes more and more unique by installing a muffler cutter with a real exhaust outlet and a separate muffler cutter in parallel. The degree of freedom in design can be remarkably improved.

1 is a side view showing a first embodiment of an automobile exhaust device according to the present invention. It is a top view of FIG. It is a bottom view of FIG. It is a front view of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 5 is a front view showing a partially modified embodiment corresponding to FIG. 4. It is sectional drawing corresponding to FIG. It is a front view which shows another partial deformation | transformation embodiment corresponding to FIG. It is sectional drawing corresponding to FIG. It is a side view which shows 2nd Embodiment of the exhaust apparatus of the motor vehicle which concerns on this invention. It is a top view of FIG. It is a front view of FIG. It is a bottom view of FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. 10. FIG. 13 is a front view showing a partially modified embodiment corresponding to FIG. 12. It is the same bottom view corresponding to FIG. It is a front view which shows another partial modification embodiment corresponding to FIG. It is the same bottom view corresponding to FIG.

  Hereinafter, specific configurations of the present invention will be described in detail with reference to the drawings. First, FIGS. 1 to 5 show a first embodiment of an exhaust device according to the present invention, and (10) is a genuine exhaust for an automobile. It is a muffler, and an exhaust discharge port (11) at the tip thereof opens obliquely downward.

  (M) is a muffler cutter that is separate from the genuine muffler (10), and is made of a stainless steel plate or other heat-resistant metal plate with a substantially U-shaped cross-section with the tip opening backward.

  That is, the muffler cutter (M) is formed into a square cylinder shape with rounded corners from the upper wall surface (top wall surface) (12), the lower wall surface (bottom wall surface) (13) and the left and right wall surfaces (14) (14). The tip of the muffler cutter (M) is the front portion of the muffler cutter (M) as compared to the rear opening as a dummy exhaust outlet (15) that does not release the exhaust from the muffler (10). It is in a state of being blocked by the wall surface (16). The opening edge of the dummy exhaust outlet (15) is curled inward for safety.

  Further, (17) is an extension pipe for a muffler for connecting the genuine muffler (10) and the muffler cutter (M), which consists of a stainless steel pipe or other heat-resistant metal pipe having a certain length. The leading end is preliminarily inserted into the muffler cutter (M) from the front wall surface (16) to the lower wall surface (13) so as to penetrate obliquely downward, and the extension pipe (17 ) As a real exhaust discharge port (18), the exhaust from the muffler (10) can be smoothly discharged toward the ground.

  Furthermore, the front wall (16) of the muffler cutter (M) has a receiving port (19) that fits in the middle part of the muffler extension pipe (17), and the lower wall surface (13) of the muffler cutter (M). Each is formed with a receiving port (20) that fits with the tip of the extension pipe (17), and the tip of the extension pipe (17) opens to the front wall surface (16) of the muffler cutter (M). Is inserted into the receiving port (20) that passes through the receiving port (19) and continues to open to the lower wall surface (13), and is received on the tip of the extension pipe (17) and the lower wall surface (13) side. The fitting surface with the port (20) is welded, and the fitting surface between the midway portion of the extension pipe (17) and the receiving port (19) on the front wall surface (16) side is also welded.

  On the other hand, the root side of the muffler extension pipe (17) is inserted and fitted from the tip of the muffler (10), and is attached and fixed to the outer peripheral surface of the muffler (10) by a plurality of presser bolts (21). Yes. (22) is a fixing nut of the presser bolt (21), and is welded to the outer peripheral surface of the extension pipe (17).

  Similarly, (23) is welded to the inner peripheral surface of the extension pipe (17), and is a locking hook that projects integrally backward from the root side of the extension pipe (17) to the muffler (10). The clamp band (B) with the worm screw (24) locked to the projecting tip is tightened to the outer peripheral surface of the muffler (10), so that the extension pipe ( 17) and the muffler cutter (M) does not fall off.

  In that case, the opening edge of the exhaust discharge opening (18) opened at the tip of the extension pipe (17) inserted into the lower wall surface (13) of the muffler cutter (M) is integrated with the muffler cutter (M). The muffler cutter (M) is located at a position spaced forward by a certain depth (depth) dimension (D) from the opening edge of the dummy exhaust discharge port (15) forming the tip of the muffler cutter (M). The dummy exhaust outlet (15) that opens rearward at the tip of the head is not easily identified as a dummy when viewed from the rear of the automobile, and it impresses as if it were a real exhaust outlet. Be able to.

  In addition, the entire inner wall surface of the muffler cutter (M) formed into a substantially U-shaped cross section from the front wall surface (16), the upper and lower wall surfaces (12) (13), and the left and right wall surfaces (14) (14), and the interior thereof The outer peripheral surface of the extension pipe (17) facing the front is colored in black so that even if the interior of the muffler cutter (M) is viewed from the rear of the automobile, it is a dummy of the exhaust discharge opening (15) that opens backward. Some things are not easily understood.

  In any case, the exhaust discharge port (18) of the extension pipe (17) that opens to the lower wall surface (13) of the muffler cutter (M) opens to the front end (rear end) of the genuine muffler (10). As a genuine one that extends the exhaust discharge port (15) to the lower wall surface (13) of the muffler cutter (M), the exhaust from the muffler (10) is discharged straight down to the ground, and the muffler cutter (M ) Collides with the lower wall surface (13) and refracts, or even blows back to the inner side of the automobile, and the rectifying action is performed reliably and smoothly.

  And although such a real exhaust discharge port (18) is substantially invisible from the rear of the automobile, a dummy exhaust discharge port (15) that opens backward from the tip of the muffler cutter (M) Since it can be seen well from the rear of the automobile, the appearance design of the muffler cutter (M) can be kept unique, and the degree of freedom in designing the appearance design can be increased.

  In short, according to the configuration of the first embodiment, the exhaust from the genuine muffler (10) can be smoothly discharged toward the ground through the real exhaust discharge port (18) in the muffler extension pipe (17). At the same time, a muffler cutter (M) whose front end portion opens as a dummy exhaust discharge port (15) is attached to and integrated with the distal end side of the extension pipe (17), so that the real exhaust discharge port ( 18) It is possible to provide an exhaust discharge port (15) on the appearance design (dummy) viewed from the rear of the automobile without being constrained by the position and direction of the vehicle, and the degree of freedom in design design. Will improve.

  In the first embodiment of FIGS. 1 to 5, the square square muffler cutter (M) having round corners as viewed from the rear of the automobile is shown, but the figure corresponds to FIGS. A circular muffler cutter (M) as seen from the rear as shown in the sixth and seventh partial modified embodiments, and an elliptical muffler cutter as seen from the rear as shown in another partial modified embodiment of FIGS. It is also possible to adopt (M).

  In the first embodiment, not only the genuine muffler (10), but also the muffler extension pipe (17) and the muffler cutter (M) are made of stainless steel material or other heat-resistant metal material, and the muffler extension. The pipe (17) and the muffler cutter (M) are welded, but only the muffler cutter (M) can be made from a heat-resistant synthetic resin material, in which case the muffler extension pipe (17) And the muffler cutter (M) may be connected and integrated by bonding instead of the above welding, rivets, bolts / nuts, or other suitable fixing means.

  6-9 are substantially the same as those of the first embodiment of FIGS. 1-5, the same reference numerals as in FIGS. 1-5 are entered in FIGS. 6-9. Therefore, the detailed description is omitted.

  Next, FIGS. 10 to 15 show a second embodiment of the present invention, in which a muffler cutter (M) having the configuration of the first embodiment, that is, through insertion of a muffler extension pipe (17). The real exhaust discharge port (18) is opened in the lower wall surface (bottom wall surface) (13) and the front end portion of the muffler cutter (M) is opened as a dummy exhaust discharge port (15). In the side-by-side position, the real exhaust discharge port (18) is not provided on the lower wall surface (13) as a simple U-shaped cross section, and the dummy exhaust discharge port (15) viewed from the rear is contoured as described above. The same muffler cutter (m) as the same dummy as (M) is arranged in parallel in an overall spectacle form, preferably by a pair of upper and lower connecting bars (25), (25).

  By installing two muffler cutters (M) (m) with dummy exhaust vents (15) that can be seen well from the rear of the vehicle in a side-by-side arrangement, the real exhaust vents (18) are also obtained. The appearance design seen from the rear of the car is designed more and more uniquely without being trapped by the opening position and direction of the vehicle, and the degree of freedom in design is greatly improved.

  In that case, in the second embodiment shown in FIGS. 10 to 15, the two muffler cutters (M) and (m) are rounded at the corners as viewed from the rear, in accordance with the first embodiment shown in FIGS. Are formed in a square tube shape of a certain square, but these are also circular when viewed from the rear as shown in the partially modified embodiment of FIGS. 16 and 17 corresponding to FIGS. Similarly, it may be formed in an elliptical shape as viewed from the rear as shown in another partial modified embodiment.

  Also in the configuration of the second embodiment of FIGS. 10 to 15 and the various partial modified embodiments of FIGS. 16 to 19, the muffler provided with a real exhaust discharge port (18) on the lower wall surface (bottom wall surface) (13). Only the cutter (M) and the muffler cutter (m), which is a dummy without the genuine exhaust outlet (18), are not only heat-resistant metal materials, but also synthetic resin materials with or without heat resistance, and others The muffler cutter (M) can be attached to the muffler extension pipe (17) by welding, bonding, rivets, bolts and nuts, or other suitable fixing means.

  In addition, since the other structure in various partial deformation | transformation embodiment of FIGS. 16-19 is substantially the same as 2nd modification embodiment of FIGS. 10-15, the same code | symbol as FIGS. Just fill in and omit the detailed explanation.

(10) ・ Genuine muffler (11) ・ Exhaust outlet (12) ・ Upper wall (13) ・ Lower wall (14) ・ Left and right wall (15) ・ Dummy exhaust outlet (16) ・ Front wall (17) -Extension pipe for muffler (18)-Real exhaust outlet (19) (20)-Receiving port (21)-Presser bolt (22)-Fixing nut (23)-Locking hook (24)-Worm screw (B ) ・ Clamp band (M) ・ Muffler cutter (m) ・ Dummy muffler cutter (D) ・ Depth (depth) dimensions

Claims (6)

A genuine muffler with the tip opening as an obliquely downward exhaust outlet, a substantially U-shaped muffler cutter with the tip opening rearward, and a fixed length muffler extension pipe connecting the genuine muffler and the muffler cutter And
By inserting the root side of the extension pipe into the genuine muffler in a slip-proof state and inserting the tip end side of the extension pipe into the penetrating state obliquely downward from the front wall surface of the muffler cutter,
The extension pipe's tip is used as an exhaust discharge port from the genuine muffler, and the lower wall surface of the muffler cutter is opened on the muffler cutter. An exhaust system for an automobile. Attach the root of the muffler extension pipe to the genuine muffler with multiple presser bolts, clamp bands, and other fasteners,
The fitting surface between the front wall of the muffler cutter and the middle part of the extension pipe inserted here and the fitting surface between the lower wall surface of the muffler cutter and the tip of the extension pipe inserted here were welded respectively. The exhaust system for an automobile according to claim 1.   The opening edge of the exhaust outlet that opens on the lower wall of the muffler cutter is spaced forward by a certain depth from the opening edge of the dummy exhaust outlet that opens at the tip of the muffler cutter. The exhaust system for an automobile according to claim 1.   2. The entire inner wall surface of the muffler cutter having a substantially U-shaped cross section and the outer peripheral surface of the muffler extension pipe inserted from the front wall surface to the lower wall surface of the muffler cutter are colored black and white. Automobile exhaust system.   The exhaust system for an automobile according to claim 1, wherein the muffler cutter is shaped into a circle, an ellipse, or a square with round corners when viewed from the rear of the automobile. While shaping the muffler cutter into a circle, ellipse or rounded corner when viewed from the rear of the car,
A separate muffler cutter, which is a dummy with the same contour shape without the exhaust discharge port, was installed side by side in the overall glasses form by a connecting bar at a position next to the muffler cutter having the exhaust discharge port from the genuine muffler. The exhaust system for an automobile according to claim 1.

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