JP4595518B2 - Muffler support structure - Google Patents

Description

  The present invention relates to a muffler support structure for supporting a muffler on a vehicle body such as an automobile.

In vehicles such as automobiles, a muffler for silencing exhaust gas from an internal combustion engine is provided in an exhaust system. The muffler is arranged under the floor of the vehicle body. A structure in which such a muffler is attached to and supported by a side member that is a vehicle body skeleton member is known (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 10-258644 JP 2002-160536 A

  However, in the conventional technology as described above, since both the front and rear support points of the muffler are provided at the upper part of the muffler, it is difficult to suppress the muffler pitching, and there is a special measure for suppressing this pitching. It was necessary.

  In view of the above fact, an object of the present invention is to obtain a muffler support structure that can suppress muffler pitching.

In order to achieve the above object, a muffler support structure according to the first aspect of the present invention is a muffler support structure for supporting a muffler on a vehicle body, a front side support portion for supporting the front side of the muffler with respect to the vehicle body, and the muffler A rear support portion for supporting the rear portion with respect to the vehicle body is disposed on the opposite side of the vertical direction center portion of the muffler, and the muffler is disposed on the same side with respect to the vehicle width direction central portion of the vehicle body. The front member is supported on the side member and the tunnel side reinforcement by the front support portion in a state of being inserted between the positioned side member and the tunnel side reinforcement .

  In the muffler support structure according to the first aspect, the front side of the muffler is supported by the vehicle body by the front side support portion, and the rear side of the muffler is supported by the vehicle body by the rear side support portion. Here, since the front support portion and the rear support portion are arranged on opposite sides with respect to the center portion in the vertical direction of the muffler, the virtual straight line connecting the front and rear support portions in the side view of the muffler and the center of gravity of the muffler The distance is close. For this reason, the muffler is supported in a well-balanced manner around the axis along the width direction (the moment arm having the center of gravity as a power point becomes smaller), and pitching around the axis along the width direction is suppressed.

  Thus, in the muffler support structure according to the first aspect, muffler pitching can be suppressed. The central portion of the muffler in the vertical direction is, for example, a portion that horizontally crosses the centroid of the muffler, and is a center line that divides the muffler into two vertically when the muffler is formed substantially vertically symmetrical. The

The muffler support structure according to claim 2 is a muffler support structure that supports a muffler on a vehicle body, and a front support portion that supports a front side of the muffler with respect to the vehicle body and a rear side support that supports a rear portion of the muffler with respect to the vehicle body. Between the side member and the tunnel side reinforcement located on the same side with respect to the vehicle width direction center of the vehicle body. In the inserted state, the front side support portion supports the side member and the tunnel side reinforcement .

  In the muffler support structure according to the second aspect, the front side of the muffler is supported by the vehicle body by the front side support portion, and the rear side of the muffler is supported by the vehicle body by the rear side support portion. Here, since the front side support portion and the rear side support portion are positioned substantially symmetrically with respect to the center of gravity of the muffler, the center of gravity of the muffler is positioned on a virtual straight line connecting the front and rear support portions in a side view of the muffler. For this reason, the muffler is supported in a well-balanced manner around the axis along the width direction (the moment arm having the center of gravity as the power point becomes substantially zero), and the pitching around the axis along the width direction is suppressed.

  Thus, in the muffler support structure according to the second aspect, muffler pitching can be suppressed. It should be noted that the front and rear support portions may be both the same with respect to the center of gravity of the muffler, or may be disposed on the opposite side in the vertical direction with respect to the center of gravity.

The muffler support structure according to claim 3 is a muffler support structure for supporting the muffler on the vehicle body, and includes a front support means for connecting a front lower portion of the muffler to the vehicle body and a rear upper portion of the muffler connected to the vehicle body. Side support means , and the muffler is inserted between the side member located on the same side of the vehicle width direction center portion of the vehicle body and the tunnel side reinforcement, and the front support portion It is supported by side members and tunnel side reinforcement .

  In the muffler support structure according to the third aspect, the front side of the muffler is supported by the vehicle body by the front side support means, and the rear side of the muffler is supported by the vehicle body by the rear side support means. Here, since the front support means supports the lower part of the muffler and the rear support means supports the upper part of the muffler, in other words, the front and rear support means are positioned on opposite sides of the muffler in the vertical direction. Thus, an arrangement is realized in which the distance between the virtual straight line connecting the support portions of the front and rear support means and the center of gravity of the muffler is small in a side view. For this reason, the muffler is supported in a well-balanced manner around the axis along the width direction (the moment arm having the center of gravity as a power point becomes smaller), and pitching around the axis along the width direction is suppressed.

  Thus, in the muffler support structure according to the third aspect, the muffler pitching can be suppressed.

  A muffler support structure according to a fourth aspect of the present invention is the muffler support structure according to the third aspect, wherein the front support means and the rear support means are arranged symmetrically in the vertical direction with respect to the center of gravity of the muffler.

  In the muffler support structure according to claim 4, since the front and rear support means are arranged symmetrically in the vertical direction with respect to the center of gravity of the muffler, in other words, on a virtual straight line connecting the support portions of the front and rear support means in a side view Since the center of gravity of the muffler is positioned at the center, the muffler is supported in a more balanced manner around the axis along the width direction (the moment arm having the center of gravity as the power point becomes zero). For this reason, the pitching around the axis along the muffler width direction is more effectively suppressed.

  A muffler support structure according to a fifth aspect of the present invention is the muffler support structure according to the third or fourth aspect, wherein the muffler is configured to introduce gas from the front side and discharge gas from the rear side. The front support means includes a first support portion that supports a lower end on one end in the width direction of the muffler with respect to the vehicle body, and a second support portion that supports a lower portion on the other end side in the width direction of the muffler with respect to the vehicle body. Including.

  In the muffler support structure according to the fifth aspect, the front support means for supporting the gas introduction side of the muffler supports the vehicle body on both sides in the width direction of the muffler front portion by the first and second support portions. Thereby, the muffler is reliably supported on the inlet side where the forcing force of gas is strong (producing a large vibration force). In particular, the front and rear support means are arranged so that the center of gravity of the muffler is located inside a polygon connecting at least three points of the support parts by the first and second support parts and the rear support means in plan view. Is desirable.

  A muffler support structure according to a sixth aspect of the present invention is the muffler support structure according to any one of the first to sixth aspects, wherein the gas inlet of the muffler is arranged offset from the central portion in the width direction.

  In the muffler support structure according to claim 6, since the gas inlet is disposed in a portion offset from the center in the width direction of the muffler, in other words, in a highly rigid portion close to the muffler cylinder wall, The radiated sound can be effectively suppressed. In particular, in the configuration in which the front support means has the first and second support portions as in claim 5, the gas inlet is located in a highly rigid portion near the support portion by any one of the support portions, and the gas inlet The other support portion, which is positioned away from the center, can receive the lateral vibration of the muffler around the inlet pipe connection portion with a large moment arm, and the radiated sound can be more effectively suppressed.

  A muffler support structure according to a seventh aspect of the present invention is the muffler support structure according to the sixth aspect, wherein the muffler is formed in an elliptic cylinder shape having a width direction as a major axis direction and a vertical direction as a minor axis direction. The gas outlet of the muffler was arranged at the center in the width direction.

  In the muffler support structure according to claim 7, the muffler formed in an elliptical cylinder has a surface area larger than that of the cylindrical muffler, so that moisture in the exhaust gas is easily condensed, and the condensed water is in the width direction of the muffler. Although it collects in the lower part of the center, since the gas outlet is provided at the center in the width direction, the condensed water is efficiently discharged out of the muffler. On the other hand, since the gas inlet located offset from the center in the width direction is higher than the center in the width direction, it is difficult for condensed water to flow upstream of the muffler.

  As described above, the muffler support structure according to the present invention has an excellent effect that muffler pitching can be suppressed.

  A muffler support structure 10 according to a first embodiment of the present invention will be described based on FIGS. 1 and 2 together with an underfloor structure of an automobile body 12 to which the muffler support structure 10 is applied. It should be noted that arrow FR, arrow RE, arrow UP, arrow LO, arrow RI, and arrow LE, which are appropriately shown in each drawing, are respectively a forward direction (traveling direction), a backward direction, and a forward direction of the vehicle body 12 to which the muffler support structure 10 is applied. An upward direction, a downward direction, a right direction, and a left direction are shown. In the following description, when simply indicating up / down, right / left, and right / left, the directions correspond to the directions of the arrows.

  FIG. 2 is a plan view showing the underfloor structure of the automobile body 12 to which the muffler support structure 10 is applied. In FIG. 2, illustration of a floor panel, a floor tunnel, a rocker, and the like is omitted. As shown in FIG. 2, the vehicle body 12 includes a pair of left and right side members 14 that are elongated in the front-rear direction. Each side member 14 is a vehicle body skeleton member that is fixed to the lower side of the floor panel and forms a closed cross-section with the floor panel. The front and rear ends of the side members 14 reach the vicinity of the front and rear ends of the vehicle body 12, and the front ends of the side members 14 are It is bridged by bumper reinforcement (not shown).

  Tunnel side reinforcements 16 are branched from the vicinity of the connection portions of the side members 14 to the dash panel (not shown). Each tunnel side reinforcement 16 is elongated in the front-rear direction, and each rear end reaches the boundary between the front floor panel and the rear floor panel (both not shown). The front part of each tunnel side reinforcement 16 and the front part of the side member 14 are formed so as to form a substantially “C” shape in which the distance along the left-right direction increases toward the rear side.

  On the floor panel in the vicinity of the middle part in the front-rear direction of each tunnel side reinforcement 16, a floor cross member 18 connects the rocker and the floor tunnel. Further, on the floor panel at the rear end position of the tunnel side reinforcement 16, the floor cross member 20 connects the left and right rockers. Furthermore, a floor cross member 22 is disposed on the floor panel between the floor cross member 18 and the floor cross member 20 so as to bridge the side member 14 and the tunnel side reinforcement 16. Furthermore, at the rear of the floor cross member 20, two front and rear floor cross members 24 connect the left and right side members 14.

  An exhaust system 25 is disposed below the floor panel of the vehicle body 12. In this embodiment, the exhaust system 25 is disposed in a substantially right half range under the floor of the vehicle body 12. The exhaust system 25 includes an exhaust pipe 26 whose front end is connected to a collective end of an exhaust manifold of an internal combustion engine (not shown). The exhaust pipe 26 guides engine exhaust gas to the rear end of the vehicle body 12. On the path of the exhaust pipe 26, a catalytic converter 28 and a main muffler 30 are provided in order from the upstream side in the exhaust gas flow direction, and the rear end of the exhaust pipe 26 is attached to the rear end portion of the vehicle body 12. The sub-muffler (silencer) 32 is connected.

  The catalytic converter 28 is configured to purify exhaust gas that passes through the catalyst accommodated therein. The main muffler 30 is adapted to reduce exhaust noise that is generated when exhaust gas is released into the atmosphere outside the automobile. The sub muffler 32 absorbs exhaust sound (mainly high frequency components) that cannot be absorbed by the main muffler. In the following description, a portion of the exhaust pipe 26 that leads the exhaust gas from the catalytic converter 28 to the main muffler 30 is referred to as an inlet pipe 34, and a portion that leads the exhaust gas from the main muffler 30 to the sub muffler 32 is referred to as an outlet pipe 36.

  As shown in FIGS. 4 and 5, the main muffler 30 is formed in a substantially elliptic cylindrical shape in which the axial direction coincides with the longitudinal direction of the vehicle body and the major axis direction coincides with the left and right direction (vehicle width direction). It is a flat type muffler that is thin in the vertical direction as a whole. The main muffler 30 is arranged such that a front portion thereof enters between the side member 14 and the tunnel side reinforcement 16 behind the left floor cross member 18. The rear end of the main muffler 30 is located in the vicinity of the front side of the front floor cross member 24.

  With this arrangement, the main muffler 3 is positioned below the floor of the portion of the vehicle body 12 from the front seat to the second seat. Each side member 14 is formed to bend so that the rear side of the floor cross member 20 is higher than the front side in the front-rear direction, and the lower end on the rear side of the floor cross member 20 has a main lower end. It is located above the upper end of the muffler 30. At this position, the main muffler 30 is fixedly supported by the vehicle body 12 by the muffler support structure 10, and this structure will be described later.

  As shown in FIGS. 4 and 2, an inlet pipe 34 is introduced from the front end of the main muffler 30. The inlet pipe 34 is introduced into the main muffler 30 from the left and right end portions (the left side which is the inner side in the vehicle width direction in this embodiment) at the front end of the main muffler 30. On the other hand, the outlet pipe 36 is connected to the central portion in the left-right direction at the rear end of the main muffler 30.

  As shown in FIG. 2, the outlet pipe 36 has a U-shaped bent portion 36 </ b> A that is curved outward in the vehicle width direction in a plan view and is curved downstream of the U-shaped bent portion 36 </ b> A. An approximately “S” -shaped S-shaped bent portion 36B and an inclined portion 36C that is continuous with the downstream side of the S-shaped bent portion 36B and is inclined with respect to the longitudinal direction of the vehicle body so as to be positioned on the outer side in the vehicle width direction are formed. The rear end of the inclined portion 36C is connected to the sub muffler 32. The shapes of the U-shaped bent portion 36A and the S-shaped bent portion 36B are shown in detail in FIG.

  As shown in FIG. 2, the inclined portion 36 </ b> C is offset by a distance W outward in the vehicle width direction with respect to the connection portion of the outlet pipe 36 to the main muffler 30. Further, the outlet pipe 36 is thinner than the inlet pipe 34 and is configured to bend and deform more easily than the inlet pipe 34. As a result, in the exhaust system 25, when a collision from behind occurs in the vehicle body 12, the U-shaped bent portion 36A is first bent and then the S-shaped bent portion 36B is bent and deformed. The main muffler 30 is displaced in a direction away from a fuel tank 38 (described later) by a moment having the generated offset distance W as a moment arm. As a result, the risk of fire occurring at the time of a collision from the rear of the vehicle can be reduced.

  A fuel tank 38 and a canister 40 are disposed under the floor of the vehicle body 12 on the opposite side of the exhaust system 25, that is, in the range of the substantially right half. The fuel tank 38 is a thin (flat) tank that is elongated along the longitudinal direction of the vehicle body, and a portion from the front portion to the middle portion of the fuel tank 38 and the side member 14 and the tunnel side reinforcement at the rear of the left floor cross member 18. 16 is arranged so as to enter between. The canister 40 is disposed between the side member 14 and the tunnel side reinforcement 16 in front of the left floor cross member 18.

  Further, the front portion 38 </ b> A of the fuel tank 38 has a tapered shape corresponding to the substantially “C” shape between the side member 14 and the front portion of the tunnel side reinforcement 16 in plan view. Thus, for example, when the fuel tank 38 moves forward at the time of a vehicle collision, the front portion 38A is sandwiched between the “C” -shaped portions between the side member 14 and the front portion of the tunnel side reinforcement 16, and further forward. Movement is restricted. The canister 40 is arranged such that the rear end thereof is positioned in front of the forward movement limit of the front end of the fuel tank 38. Therefore, a configuration is realized in which the canister 40 is prevented from being damaged by the collision of the fuel tank at the time of a collision from the rear of the vehicle.

  Next, the main part of the muffler support structure 10, that is, the support structure of the main muffler 30 to the vehicle body 12 will be described. As shown in FIG. 2, the main muffler 30 is supported at the tunnel side reinforcement 16 through the left front support portion 42 as the first support portion at the front end left portion, and the front right end portion as the second support portion. Is supported by the side member 14 via the right front support portion 44. Further, the rear end portion of the main muffler 30 is supported by the front floor cross member 24 via the rear support portion 46. As shown in FIG. 3, the left front support portion 42, the right front support portion 44, and the rear support portion 46 are arranged such that the center of gravity G of the main muffler 30 is located inside a virtual triangle T that has the top as a top in plan view. ing. Thereby, the main muffler 30 can be stably supported by the vehicle body 12.

  Further, as schematically shown in FIG. 1, the left front support portion 42 and the right front support portion 44 support the lower portion of the main muffler 30 with respect to the vehicle body 12, and the rear support portion 46 supports the upper portion of the main muffler 30. It supports the vehicle body 12. In this embodiment, the left front support portion 42, the right front support portion 44, and the rear support portion 46 are disposed so as to be substantially symmetric with respect to the center of gravity G of the main muffler 30 in a side view. In other words, the left front support portion 42 and the virtual straight line L connecting the right front support portion 44 and the rear support portion 46 are arranged to pass through the center of gravity G of the main muffler 30 in a side view. Thereby, the muffler support structure 10 is configured to be able to support the main muffler 30 to the vehicle body 12 more stably. Instead of the center of gravity G, the virtual straight line L may be designed so as to pass through the centroid substantially coincident with the center of gravity G of the main muffler 30 in a side view.

  In the muffler support structure 10, the left front support part 42 and the right front support part 44 correspond to the front support part or the front support means in the present invention, and the rear support part 46 corresponds to the rear support part or the rear support means in the present invention. .

  The muffler support structure 10 will be described more specifically. As shown in FIGS. 4 and 3, the left front support portion 42 includes a support rod 48 whose rear end is fixed to the lower left front portion of the main muffler 30, and the front-rear direction. The body support 50 is fixed to the lower surface of the tunnel side reinforcement 16, and the support rod 48 and the support rubber 52 that penetrate the body support 50 are connected to each other. ing. The left front support portion 42 is disposed directly below the tunnel side reinforcement 16.

  Further, the right front support portion 44 has a support rod 54 whose rear end is fixed to the lower right portion of the front end of the main muffler 30 and one end which is elongated in the front-rear direction and bent upward is fixed to the inner surface of the side member 14. The body support 56 and a support rubber 58 that penetrates and connects the support rod 54 and the body support 56 that are arranged in parallel to each other. The right front support portion 44 is disposed slightly inward in the vehicle width direction below the side member 14 below the side member 14.

  Further, the rear support portion 46 is fixed at a position where the front end is avoided from the outlet pipe 36 at the upper rear end of the main muffler 30 and the rear portion is bent in parallel with the floor cross member 24 and is elongated in the left-right direction. The body support 62 is fixed to the floor cross member 24 at one end, and the support rod 60 and the body support 62 that are arranged in parallel to each other are passed through and connected to each other. The rear support portion 46 is disposed at the lower portion of the floor cross member 24 immediately before.

  In this embodiment, the top of the virtual triangle T and the base end and terminal end of the virtual straight line L are the support centers (support rods 52, 58, 64) on the axes of the support rods 48, 54, 60, respectively. The support length of the support rubber 52 such as 48 is divided into two equal positions).

  Next, the operation of the first embodiment will be described.

  In the muffler support structure 10 configured as described above, the front portion of the main muffler 30 is supported by the vehicle body 12 by the left front support portion 42 and the right front support portion 44, and the rear portion of the main muffler 30 is supported by the vehicle body 12 by the rear support portion 46. ing.

  Here, as shown in FIG. 1, the left front support portion 42, the right front support portion 44, and the rear support portion 46 are positioned on the opposite sides in the vertical direction with respect to the center of gravity G of the main muffler 30. In addition, a configuration in which the distance to the virtual straight line L connecting the right front support portion 44 and the rear support portion 46 is small, that is, a configuration in which the moment arm around the left-right axis having the center of gravity G as the force action point is small is realized. In particular, in this embodiment, since the left front support part 42, the right front support part 44, and the rear support part 46 are arranged symmetrically with respect to the center of gravity G in a side view, the center of gravity G is located on the virtual straight line L and the above-mentioned The moment arm is substantially zero.

  For this reason, in the muffler support structure 10, the main muffler 30 is supported in a well-balanced manner around the virtual axis along the left-right direction, and the vibration, that is, pitching of the main muffler 30 around the virtual axis is suppressed. Radiated sound is also suppressed. In particular, the main muffler 30, which is a flat muffler formed in an elliptical cylinder shape with the vehicle width direction as the major axis direction, has a large surface area on the top and bottom and has a characteristic of easily generating radiated sound due to pitching. In the muffler support structure 10, the generation of radiated sound can be effectively suppressed by effectively suppressing the pitching of the main muffler 30 as described above.

  Thus, in the muffler support structure 10 according to the first embodiment, pitching (longitudinal vibration) of the main muffler 30 can be suppressed.

  Further, in the muffler support structure 10, the inlet pipe 34 is disposed offset from the central portion in the width direction of the main muffler 30, so that the gas having a strong forcing force from the inlet pipe 34 has high rigidity of the main muffler 30 itself. It will be discharge | released to the cylinder wall vicinity, and generation | occurrence | production of the radiation sound by the forced force (vibration force) of gas can be suppressed. In addition, since the left front support portion 42 is disposed in the vicinity of the portion where the inlet pipe 34 is disposed in the main muffler 30, the gas having a strong forcing force is released to the portion where the support rigidity of the main muffler 30 is high as described above. As a result, generation of radiated sound due to gas forcing can be effectively suppressed. Further, since the front part of the main muffler is supported on the vehicle body 12 by the right front support part 44 together with the left front support part 42, the main muffler with the connecting portion of the inlet pipe 34 from which a strong forced gas is discharged as the center of rotation. Rotational vibration (lateral vibration) along 30 horizontal planes can be received by the right front support portion 44 having a large moment arm, and generation of radiated sound can be more effectively suppressed.

  Further, in the muffler support structure 10, since the outlet pipe 36 is connected to the central portion in the width direction of the main muffler 30, the lowest portion in the main muffler 30 is formed, and the central portion in the width direction in which condensed water tends to accumulate. The condensed water is effectively discharged. In particular, the main muffler 30 which is a flat muffler has a large surface area per volume, and thus it is easy to condense moisture in the exhaust gas, but this condensed water can be reliably discharged downstream. And since the inlet pipe 34 is arrange | positioned at the edge part side higher than the center part of the width direction of the main muffler 30 as above-mentioned, the structure where condensed water does not flow easily into the inlet pipe 34 side is implement | achieved.

  Further, in the muffler support structure 10, the side member 14 and the tunnel side reinforcement 16 are connected via the main muffler 30, the left front support portion 42, and the right front support portion 44. Sometimes a load can be transmitted from the side member 14 to the tunnel side reinforcement 16. Thereby, a deformation | transformation of the vehicle body 12 can be suppressed at the time of a vehicle side collision. Further, since the main muffler 30 (upper part thereof) enters between the side member 14 and the tunnel side reinforcement 16, the main muffler 30 deforms and distributes the load received from the side member 14 at the time of a vehicle side collision. The load can be transmitted to the tunnel side reinforcement 16 (while absorbing). Since the main muffler 30 is arranged from the front seat to the second seat, it contributes to passenger protection. Thus, since the main muffler 30 functions as a cross member, the number of cross members can be reduced to secure an arrangement space for the main muffler 30, and the degree of freedom in layout is increased.

  As described above, the main muffler 30 can be disposed close to the floor panel by the configuration that suppresses the pitching of the main muffler 30, and thereby the main muffler 30 is connected to the side member 14 and the tunnel side reinforcement. 16 is realized (the height of the main muffler 30 entering between the side member 14 and the tunnel side reinforcement 16 is increased to function as a cross member).

  Next, a muffler support structure 70 according to a second embodiment of the present invention will be described with reference to FIG. The muffler support structure 70 is different from the muffler support structure 10 in that a muffler support structure 70 includes a rear support part 72 instead of the rear support part 46. The rear support portion 72 has a front end fixed at a position avoiding the outlet pipe 36 at the upper rear end of the main muffler 30 and a rear portion bent in parallel with the side member 14 and a longitudinal direction in the front-rear direction. And a body support 76 whose one end bent upward is fixed to the inner surface of the side member 14, and a support rubber 78 that penetrates and connects the support rod 60 and the body support 62 arranged in parallel to each other. ing.

  Other configurations of the muffler support structure 70 are the same as the corresponding configurations of the muffler support trough 10. Therefore, the muffler indicating structure 70 according to the second embodiment can achieve the same effect as that of the first embodiment.

  In each of the above embodiments, the left front support part 42 and the virtual straight line L connecting the right front support part 44 and the rear support part 46 are shown passing through the center of gravity G (centroid) of the main muffler 30 in a side view. The present invention is not limited to this. For example, an imaginary straight line L connecting either the left front support part 42 or the right front support part 44 and the rear support part 46 passes through the center of gravity G of the main muffler 30. Alternatively, the left front support portion 42 and the right front support portion 44 (one of them) may be disposed on the opposite side in the vertical direction with respect to the center of gravity G with respect to the rear support portion 46 (the imaginary straight line L indicates the center of gravity G). Do not need to pass). It goes without saying that the left and right front support portions 42 and the right front support portion 44 and the rear support portion 46 may be arranged in the vertical direction opposite to each other.

It is a side view which shows typically the principal part of the muffler support structure which concerns on the 1st Embodiment of this invention. 1 is a plan view showing a lower structure of an automobile body to which a muffler support structure according to a first embodiment of the present invention is applied. It is a top view of the muffler support structure concerning a 1st embodiment of the present invention. 1 is a perspective view of a muffler support structure according to a first embodiment of the present invention. It is a perspective view of the main muffler supported by the muffler support structure concerning the 1st embodiment of the present invention. It is a perspective view of the muffler support structure concerning a 2nd embodiment of the present invention.

Explanation of symbols

10 Muffler support structure 12 Car body 30 Main muffler (muffler)
34 Inlet pipe (gas inlet)
36 Outlet pipe (gas outlet)
42 left front support (front support, front support, first support)
44 Right front support (front support, front support, second support)
46 Rear support part (rear support part, rear support means)
70 Muffler support structure 76 Rear support part (rear support part, rear support means)

Claims (7)

A muffler support structure for supporting the muffler on the vehicle body,
A front support part for supporting the front side of the muffler with respect to the vehicle body and a rear support part for supporting the rear part of the muffler with respect to the vehicle body are arranged on the opposite side in the vertical direction with respect to the vertical center part of the muffler ;
In addition, in the state in which the muffler is inserted between the side member located on the same side with respect to the vehicle width direction center portion of the vehicle body and the tunnel side reinforcement, the side member and the tunnel side reinforcement are formed by the front support portion. The muffler support structure supported by A muffler support structure for supporting the muffler on the vehicle body,
A front support part that supports the front side of the muffler with respect to the vehicle body and a rear support part that supports the rear part of the muffler with respect to the vehicle body are arranged symmetrically with respect to the center of gravity of the muffler ,
In addition, in the state where the muffler is inserted between the side member located on the same side with respect to the vehicle width direction center portion of the vehicle body and the tunnel side reinforcement, the side member and the tunnel side reinforcement are formed by the front support portion. The muffler support structure supported by A muffler support structure for supporting the muffler on the vehicle body,
Front support means for connecting the front lower part of the muffler to the vehicle body, and rear support means for connecting the rear upper part of the muffler to the vehicle body ,
In addition, in the state in which the muffler is inserted between the side member located on the same side with respect to the vehicle width direction center portion of the vehicle body and the tunnel side reinforcement, the side member and the tunnel side reinforcement are formed by the front support portion. The muffler support structure supported by   The muffler support structure according to claim 3, wherein the front support means and the rear support means are arranged symmetrically in the vertical direction with respect to the center of gravity of the muffler. The muffler is configured such that gas is introduced from the front side and gas is discharged from the rear side,
The front support means includes a first support portion that supports a lower end on one end in the width direction of the muffler with respect to the vehicle body, and a second support portion that supports a lower portion on the other end side in the width direction of the muffler with respect to the vehicle body. The muffler support structure according to claim 3 or 5.   The muffler support structure according to any one of claims 1 to 5, wherein a gas inlet of the muffler is arranged offset from a central portion in the width direction.   7. The muffler support according to claim 6, wherein the muffler is formed in an elliptic cylinder shape having a width direction as a major axis direction and a vertical direction as a minor axis direction, and a gas outlet of the muffler is disposed at a center portion in the width direction. Construction.

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