JP2014111410A - Exhaust pipe support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an exhaust pipe support structure capable of inhibiting foreign objects from depositing on a muffler provided at an exhaust pipe.SOLUTION: An exhaust pipe 12 includes a muffler 26 which is disposed at the vehicle rear side of a rear tire 22 provided at a rear side part of a vehicle and reduces exhaust sounds of an internal combustion engine. A third support rod 44 is provided at a front end part of the muffler 26. The third support rod 44 is formed so as to extend toward a third support part 46 provided at a rear floor panel 16 of a vehicle body 10 and is engaged by the third support part 46 through a muffler support 36 having viscoelasticity. Further, the support rod is not provided at a vehicle rear side portion of the muffler 26. In other words, the support rod (the third support rod 44) is provided only at the front end part of the muffler 26.

Description

  The present invention relates to an exhaust pipe support structure for a vehicle.

  Patent Document 1 below discloses an exhaust pipe including a main muffler and a sub muffler that exhausts exhaust gas of an internal combustion engine to the rear side of the vehicle and silences exhaust noise. Briefly describing the technology described in this document, the exhaust pipe is connected to a first exhaust pipe portion having a main muffler and a catalyst and one end connected to the exhaust manifold, and to a downstream side of the first exhaust pipe portion. A second exhaust pipe portion of the curved pipe. In addition, a sub muffler is provided in the second exhaust pipe portion, and this sub muffler is disposed on the rear side of the rear tire. The exhaust pipe described above is supported by the vehicle body via a plurality of suspension members.

Japanese Patent No. 4692322

  However, in the configuration described in Patent Document 1, the suspension member provided at the rearmost part of the exhaust pipe is provided at the rear part of the sub-muffler. Therefore, when traveling on a snowy road, the snow scraped by the rotation of the rear tire comes into contact with the suspension member, and the snow contacted with the suspension member accumulates on the sub-muffler and forms an ice block.

  On the other hand, the suspension member that supports the exhaust pipe on the vehicle body has a muffler hanger formed using an elastic member such as rubber. Therefore, the exhaust pipe can swing while the exhaust pipe is supported by the vehicle body. Here, when the exhaust pipe swings in a state where snow is accumulated on the sub muffler, it is conceivable that the snow accumulated on the sub muffler and the ice lump ice contact the vehicle body and generate abnormal noise.

  In view of the above fact, an object of the present invention is to obtain an exhaust pipe support structure capable of suppressing foreign matter from accumulating on a muffler provided in the exhaust pipe.

  The exhaust pipe support structure according to the first aspect of the present invention is provided on the exhaust pipe into which exhaust gas discharged from the internal combustion engine is introduced and on the vehicle rear side of the rear tire provided on the rear side portion of the vehicle. A muffler disposed and silenced from the exhaust sound of the internal combustion engine, and provided only at the front end portion of the muffler and formed to extend toward a support portion provided on the floor of the vehicle body and supporting the exhaust pipe And a support rod locked to the support portion via a muffler support having viscoelasticity.

  In the first aspect of the present invention, the exhaust pipe into which the exhaust gas discharged from the internal combustion engine is introduced is provided with a muffler that silences the exhaust sound of the internal combustion engine. The muffler is disposed on the vehicle rear side of the rear tire, and a support rod is provided at the front end of the muffler. The exhaust pipe is supported by the vehicle body by the support rod being locked to a support portion provided on the floor of the vehicle body via the muffler support.

  By the way, when the rear tire rotates and foreign matter such as snow is scraped up, the foreign matter comes into contact with the support rod and falls to the vehicle lower side of the support rod. Here, in this invention, the support rod is provided only in the front-end part of the muffler. Therefore, the foreign matter scraped up by the rear tire is difficult to fall on the muffler.

  An exhaust pipe support structure according to a second aspect of the present invention is the exhaust pipe support structure according to the first aspect, wherein the support rod has a facing portion facing the road surface of the rear tire and a vehicle front-rear direction. Is provided.

  In a second aspect of the present invention, a part (opposing portion) of the support rod for supporting the exhaust pipe on the floor of the vehicle body faces the ground contact surface to the road surface of the rear tire in the vehicle front-rear direction. Therefore, the foreign matter scraped up by the rear tire is likely to come into contact with the support rod (opposing portion). Thereby, the quantity of the foreign material which falls on a muffler is reduced.

  The exhaust pipe support structure according to the first aspect of the present invention has an excellent effect that foreign matter can be prevented from accumulating on the muffler provided in the exhaust pipe.

  The exhaust pipe support structure according to the second aspect of the present invention has an excellent effect that foreign matter can be further prevented from being deposited on the muffler provided in the exhaust pipe.

It is the expanded bottom view which looked at the rear side part of the vehicle body from the vehicle lower side. It is the enlarged front view which looked at the rear side part of the vehicle body from the vehicle front side.

  Next, an exhaust pipe support structure according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The front side in the vehicle front-rear direction is indicated by an arrow FR, the outer side in the vehicle width direction is indicated by an arrow OUT, and the upper side in the vehicle vertical direction is indicated by an arrow UP. Moreover, in the following description, when simply indicating the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated.

  As shown in FIG. 1, exhaust gas discharged from an internal combustion engine (not shown) is introduced to the lower side of a vehicle body 10 to which the exhaust pipe support structure of the present embodiment is applied, and the exhaust gas is disposed on the vehicle rear side. An exhaust pipe 12 for exhausting is provided. Hereinafter, a schematic configuration of the rear portion of the vehicle body 10 will be described first, and then a configuration of the exhaust pipe 12 which is a main portion of the present embodiment will be described.

(Schematic configuration of the rear part of the vehicle body 10)
A rear portion of the vehicle body 10 is provided with a pair of rear side members 14 disposed on both sides in the vehicle width direction and extending in the vehicle front-rear direction. A rear floor panel 16 as a floor extending in the vehicle front-rear direction and the vehicle width direction is provided above the rear side member 14. Furthermore, a center floor panel 18 extending in the vehicle front-rear direction and the vehicle width direction is provided on the vehicle front side of the rear floor panel 16. The center floor panel 18 is formed in a substantially rectangular shape when viewed from the bottom of the vehicle, and the front end portion of the rear floor panel 16 is joined to the rear end portion of the center floor panel 18 by welding. Center floor side panels 20 extending in the longitudinal direction of the vehicle are joined to both ends of the center floor panel 18 in the vehicle width direction by welding. A rear wheel house 24 in which a rear tire 22 is accommodated is provided outside the rear floor panel 16 and the center floor panel 18 in the vehicle width direction. The rear wheel house 24 is formed so as to bulge inward in the vehicle width direction (toward the cabin side), and the rear floor panel 16 and the center floor side panel 20 are formed at the lower end of the rear wheel house 24. The outside part in the vehicle width direction is joined by welding.

(Configuration of exhaust pipe 12)
The exhaust pipe 12 includes a front pipe (not shown) connected to an exhaust manifold (not shown) that collects exhaust gas discharged from each cylinder of the internal combustion engine. The exhaust pipe 12 has a front pipe connected to the front pipe and a main pipe 28 having a muffler 26 for silencing the exhaust noise, and an end pipe 30 for discharging the exhaust gas flowing out of the muffler 26 to the vehicle rear side. And.

  The front pipe is formed by bending the pipe material, and a front flange portion and a rear flange portion are provided at the front end and the rear end of the front pipe, respectively. The front flange portion is connected to a flange portion provided on the downstream side of the exhaust manifold, and the rear flange portion is a flange portion 32 provided at the front end portion of the main pipe 28 described in detail later (see FIG. 2). It is connected to the.

  The main pipe 28 is formed by bending a pipe material or the like like the front pipe, and the main pipe 28 includes a first pipe portion 28A extending in the vehicle front-rear direction. A flange portion 32 (see FIG. 2) is provided at the front end portion of the first pipe portion 28A, and a catalyzer for purifying exhaust gas at the front end portion of the first pipe portion 28A and the rear side of the flange portion. (Not shown) is provided. A first support rod 34 formed to extend outward in the vehicle width direction is joined to the rear end portion of the first pipe portion 28A. The distal end portion of the first support rod 34 is locked to a first support portion 38 provided on the center floor panel 18 via a muffler support 36 having viscoelasticity. Further, the main pipe 28 includes a second pipe portion 28B extending from the rear end of the first pipe portion 28A so as to incline in the vehicle width direction toward the vehicle rear side. Further, the main pipe 28 includes a third pipe portion 28C extending from the rear end of the second pipe portion 28B toward the vehicle rear side. Further, a second support rod 40 formed to extend inward in the vehicle width direction is joined to an intermediate portion of the third pipe portion 28C in the vehicle front-rear direction. The distal end portion of the second support rod 40 is locked to a second support portion 42 provided on the rear floor panel 16 through a muffler support 36 having viscoelasticity like the first support rod 34. The main pipe 28 includes a fourth pipe portion 28D and a fifth pipe portion 28E that bend and extend outward from the rear end of the third pipe portion 28C in the vehicle width direction. The fourth pipe portion 28D extends substantially parallel to the vehicle width direction, and the fifth pipe portion 28E extends with a gentle inclination toward the vehicle rear side as it goes outward in the vehicle width direction. Further, the outer end of the fifth pipe portion 28E in the vehicle width direction is disposed on the vehicle rear side of the rear wheel house 24 and is a bent portion 28F that bends toward the vehicle rear side.

  A muffler 26 is provided on the rear side of the vehicle and on the rear side of the rear tire 22. The muffler 26 is joined to the rear end of the bent portion 28F, so that exhaust gas can flow into the muffler 26. As shown in FIGS. 1 and 2, the muffler 26 includes an elliptical front wall portion 26A and a rear wall portion 26B, and a front wall portion 26A and a rear wall portion 26B having a longitudinal direction in the vehicle width direction when viewed from the front of the vehicle. It has the side wall part 26C which connects. A plurality of expansion chambers are provided inside the muffler 26, and the expansion chambers are separated by a plurality of separators. As the exhaust gas passes through the plurality of expansion chambers, the vibration of the exhaust gas interferes, and the pressure of the exhaust gas is reduced to mute the exhaust sound.

  A third support rod 44 as a support rod is provided at the front end of the muffler 26. The third support rod 44 includes a joint portion 44A that extends along the vehicle width direction and is joined to a portion on the outer side in the vehicle width direction of the front wall portion 26A of the muffler 26. Further, the third support rod 44 extends from the end of the joint portion 44A on the outer side in the vehicle width direction toward the third support portion 46 as a support portion provided on the rear floor panel 16 and to the road surface of the rear tire 22. A facing portion 44B is provided to face the ground plane in the vehicle front-rear direction. Further, a portion of the facing portion 44B on the outer side in the vehicle width direction is an attachment portion 44C of the muffler support 36.

  Further, in the present embodiment, a support rod is not provided in a portion of the muffler 26 on the vehicle rear side (a portion on the vehicle rear side of the front wall portion 26A of the muffler 26). That is, a support rod (third support rod 44) is provided only at the front end of the muffler 26. The third support rod 44 described above is attached to the third support portion 46 provided on the rear floor panel 16 via the muffler support 36 having viscoelasticity, like the first support rod 34 and the second support rod 40 described above. It is locked.

  An end pipe 30 is attached to the rear end of the muffler 26. Accordingly, the exhaust gas in the muffler 26 can be discharged to the vehicle rear side through the end pipe 30. The rear end of the end pipe 30 is disposed on the vehicle front side with respect to the rear bumper cover 48 and is gently inclined toward the vehicle lower side.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1, in the present embodiment, a muffler 26 that silences the exhaust sound of the internal combustion engine is provided in the exhaust pipe 12 into which the exhaust gas discharged from the internal combustion engine is introduced. The exhaust pipe 12 is provided with a first support rod 34, a second support rod 40, and a third support rod 44. The first support rod 34, the second support rod 40, and the third support rod 44 are provided on the floor (the center floor panel 18 and the rear floor panel 16) of the vehicle body via the muffler support 36. The exhaust pipe 12 is supported by the vehicle body 10 by being locked to the support portion 42 and the third support portion 46.

  By the way, when the foreign matter such as snow is scraped up by the rotation of the rear tire 22, the foreign matter comes into contact with the third support rod 44 disposed on the rear side of the rear tire 22, and the third support rod 44 is below the vehicle. Falls to the side. Here, in the present embodiment, since the third support rod 44 is provided at the front end of the muffler 26, the foreign matter scraped up by the rear tire 22 is unlikely to fall on the muffler. Thereby, according to this embodiment, it can suppress that a foreign material accumulates on the muffler 26 provided in the exhaust pipe 12. FIG.

  As shown in FIG. 2, in the present embodiment, a part of the third support rod 44 (opposing portion 44 </ b> B) for supporting the exhaust pipe 12 on the floor (rear floor panel 16) of the vehicle body 10 is the rear tire 22. It faces the ground contact surface to the road surface in the vehicle longitudinal direction. Therefore, the foreign matter scraped up by the rear tire 22 easily comes into contact with the third support rod 44 (opposing portion 44B). Thereby, the quantity of the foreign material which falls on the muffler 26 is reduced. As a result, in the present embodiment, it is possible to further suppress the accumulation of foreign matters on the muffler 26 provided in the exhaust pipe 12.

  In the present embodiment, an example has been described in which a part of the third support rod 44 (opposing portion 44B) faces the ground contact surface to the road surface of the rear tire 22 in the vehicle front-rear direction. However, the third support rod 44 may be configured such that a part of the third support rod 44 does not face the ground contact surface to the road surface of the rear tire 22 in the vehicle front-rear direction. As described above, whether or not a part of the third support rod 44 is opposed to the ground contact surface with respect to the road surface of the rear tire 22 in the vehicle front-rear direction and the third support portion 46 provided on the muffler 26 and the rear floor panel 16 is determined. It may be set as appropriate in consideration of the position and the like.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10 body
12 Exhaust pipe
16 Rear floor panel (floor)
22 Rear tire
26 Muffler
36 Muffler support
44 Third support rod (support rod)
44B Opposite part
46 3rd support part (support part)

Claims (2)

A muffler that is provided on an exhaust pipe into which exhaust gas discharged from the internal combustion engine is introduced and is disposed on the vehicle rear side of a rear tire provided on a rear side portion of the vehicle, and muffles exhaust noise of the internal combustion engine;
The muffler is provided only at the front end portion of the muffler, and is formed to extend toward a support portion provided on the floor of the vehicle body that supports the exhaust pipe. A support rod to be locked
Exhaust pipe support structure.   The exhaust pipe support structure according to claim 1, wherein the support rod is provided with a facing portion facing the ground contact surface to the road surface of the rear tire in the vehicle front-rear direction.

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