CN108331639B - Silencer with improved structure - Google Patents
Silencer with improved structure Download PDFInfo
- Publication number
- CN108331639B CN108331639B CN201810034702.XA CN201810034702A CN108331639B CN 108331639 B CN108331639 B CN 108331639B CN 201810034702 A CN201810034702 A CN 201810034702A CN 108331639 B CN108331639 B CN 108331639B
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- Prior art keywords
- tube
- pipe
- muffler
- space
- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
A muffler is mounted on a vehicle and has a shell member, a partition, and a 1 st pipe. The shell member is a portion forming an outer surface of the muffler. The partition plate is a plate-shaped portion, and is a portion that partitions the space inside the housing member into the 1 st space and the 2 nd space and has a pipe hole portion. The 1 st tube extends from a 1 st outer hole provided in the housing member to the inside of the housing member in a state of communicating with the 1 st space, and the 1 st tube is disposed in a state of being inserted into the tube hole. The 1 st tube is supported by the edge portion of the separator surrounding the tube hole portion in a state of being movable in a direction in which the 1 st tube is inserted into the tube hole portion and in a direction opposite to the above direction.
Description
Technical Field
The present disclosure relates to a muffler mounted on a vehicle.
Background
An elongated cylindrical muffler having openings at both ends is known as described in japanese patent application laid-open publication No. 2011-127587. A plurality of pipes connecting the openings are provided in the center of the muffler. Further, a plurality of holes are provided in the side surface of the pipe. The flow of the exhaust gas flowing into the pipe from one opening is diffused in the radial direction through the hole portion, thereby reducing noise.
Disclosure of Invention
Problems to be solved by the invention
The muffler in japanese patent application laid-open publication No. 2011-127587 has an elongated shape, and a long pipe is arranged inside. However, the long tube as described above has a large extension in the longitudinal direction due to thermal expansion. Thus, at high temperatures, the configuration of the pipe or muffler may be deformed.
It is desirable to suppress the influence of thermal expansion.
Technical scheme for solving problems
A muffler of one aspect of the present disclosure is mounted on a vehicle. The muffler has a shell member, a partition, and a 1 st pipe. The shell member is a portion configured to form an outer surface of the muffler. The partition is a plate-shaped portion, and is a portion having a pipe hole portion configured to partition the space inside the housing member into a 1 st space and a 2 nd space. The 1 st pipe is configured to extend from a 1 st outer hole provided in the housing member to the inside of the housing member in a state of communicating with the 1 st space, and the 1 st pipe is disposed in a state of being inserted into the pipe hole. The separator is configured such that the 1 st tube is supported by an edge portion of the separator surrounding the tube hole portion in a state in which the 1 st tube is movable in a direction in which the 1 st tube is inserted into the tube hole portion and in a direction opposite to the above direction. In addition, the 1 st tube is attached to an edge portion surrounding the 1 st outer hole portion in the housing member.
Here, the direction in which the 1 st tube is inserted into the tube hole portion is referred to as an insertion direction. According to the above configuration, in a state where the 1 st tube is movable in the insertion direction and the direction opposite to the insertion direction, the 1 st tube is supported by the edge portion of the partition plate surrounding the tube hole portion. In addition, the 1 st tube is attached to the 1 st outer hole portion in the housing member. Therefore, the 1 st tube can be extended toward the baffle side while suppressing the 1 st tube from exerting a load on other members of the radiator when thermal expansion occurs. That is, the extension of the 1 st tube due to thermal expansion can be absorbed. Therefore, the influence of thermal expansion can be suppressed.
The partition plate may have a support portion protruding from an edge portion of the partition plate surrounding the pipe hole portion to the 1 st space or the 2 nd space, and the support portion may be configured to surround the 1 st pipe inserted into the pipe hole portion and support the 1 st pipe. The portion of the support portion that forms the bent portion at the root of the support portion and is located inside the support portion may be provided with a roundness.
According to the above configuration, when the 1 st tube is thermally expanded, the 1 st tube can be moved more smoothly in the insertion direction and the direction opposite to the insertion direction. Therefore, the extension of the 1 st tube due to thermal expansion can be more reliably absorbed.
In addition, the partition plate may have a support portion and a wall portion. The support portion may be a portion protruding from an edge portion of the separator surrounding the tube hole portion to the 1 st space or the 2 nd space, and the support portion may be configured to surround the 1 st tube inserted into the tube hole portion and support the 1 st tube. The wall portion may be a plate-shaped portion configured to surround the support portion. The wall portion may be provided with a step that surrounds the support portion and protrudes in the same direction as the protruding direction of the support portion.
According to the above configuration, when the 1 st tube is thermally expanded, the 1 st tube can be moved more smoothly in the insertion direction and the direction opposite to the insertion direction. Therefore, the extension of the 1 st tube due to thermal expansion can be more reliably absorbed.
In addition, the muffler may further include a 2 nd pipe, the 2 nd pipe being configured to extend from a 2 nd outer hole portion provided in the case member in a state of communicating with the 2 nd space, and a 1 st end portion being one end portion of the 2 nd pipe may be disposed in the 2 nd space. Also, the edge of the opening at the 1 st end in the 2 nd tube may be arranged along the step in the wall portion of the bulkhead.
According to the above configuration, in the manufacturing process of the muffler, the position where the 2 nd pipe is arranged can be determined based on the step of the partition plate. Therefore, the 2 nd pipe can be easily and reliably arranged, and the muffler can be more easily manufactured.
Further, the muffler may further include a 2 nd pipe shorter than the 1 st pipe, the 2 nd pipe being configured to extend from a 2 nd outer hole portion provided in the shell member in a state of communicating with the 2 nd space, and a 1 st end portion being one end portion of the 2 nd pipe being disposed in the 2 nd space.
As the length of the tube increases, the degree of extension in the length direction due to thermal expansion becomes greater. In contrast, according to the above configuration, the extension of the longer pipe among the plurality of pipes disposed in the muffler due to thermal expansion can be absorbed. Therefore, the influence of thermal expansion can be more appropriately suppressed.
In addition, the 2 nd tube may be thicker than the 1 st tube.
Even with the configuration as described above, the extension of the 1 st tube due to thermal expansion can be absorbed.
In addition, the 1 st end of the 2 nd tube may be supported by the separator.
According to the above configuration, the 1 st tube and the 2 nd tube are supported by the partition plate. Therefore, the number of parts of the muffler can be reduced.
The 1 st end portion of the 2 nd tube supported by the partition plate may be disposed so as to cover the tube hole portion.
According to the above configuration, the 1 st tube and the 2 nd tube are arranged in a row. Therefore, the muffler can be miniaturized.
The muffler may further include a cover configured to cover all or a part of an opening in the 1 st pipe, the opening communicating with the 2 nd space. In addition, the partition plate may have 1 or more communication hole portions communicating the 1 st space and the 2 nd space. And, a portion of the side surface of the 1 st tube located in the 1 st space may be provided with 1 or more 1 st side surface hole parts.
According to the above configuration, when the exhaust gas passes through 1 or more communication hole portions in the partition plate, the flow of the exhaust gas expands. This can reduce noise of the muffler satisfactorily.
In addition, when the muffler is mounted on the vehicle, 1 or more 1 st side hole portions in the 1 st pipe may be arranged to be located on the upper side.
The condensed water sometimes accumulates at the bottom of the shell member of the muffler. The condensed water is water generated by condensation of water vapor contained in the exhaust gas. According to the above configuration, the condensed water accumulated in the bottom portion of the housing member can be suppressed from flowing into the 1 st tube. Therefore, the condensed water can be suppressed from flowing out to the external exhaust pipe communicating with the muffler.
In addition, all or a part of the opening in the 2 nd tube at the 1 st end may be covered, and 1 or more 2 nd side hole parts may be provided on the side of the 2 nd tube.
According to the above configuration, when the exhaust gas flowing downward through the 2 nd pipe passes through the 1 st or more 2 nd side hole portions, the flow of the exhaust gas expands. This can favorably suppress noise of the muffler.
In addition, when the muffler is mounted on the vehicle, 1 or more 2 nd side hole portions in the 2 nd pipe may be arranged to be located at an upper side.
According to the above configuration, the condensed water accumulated in the bottom portion of the housing member can be suppressed from flowing into the 2 nd tube. Therefore, the condensed water can be suppressed from flowing out to the external exhaust pipe communicating with the muffler.
Drawings
Fig. 1A is a side view showing the inside of the muffler of the present embodiment in a perspective manner.
FIG. 1B shows the separator as viewed from the front, and is a cross-sectional view of 1B-1B in FIG. 1A.
Fig. 2A is a cross-sectional view of a portion where a partition plate is arranged in the muffler of the present embodiment, as viewed from the side.
Fig. 2B is a cross-sectional view of a part of the flange portion in the muffler of the present embodiment, as viewed from the side.
Fig. 2C is a cross-sectional view of a part of the flange portion in the muffler of the present embodiment, as viewed from the side.
Fig. 2D is a cross-sectional view of a part of the flange portion in the muffler of the present embodiment, as viewed from the side.
Fig. 3A is a cross-sectional view of a portion where a partition plate is arranged in the muffler of modification 1 as viewed from the side.
Fig. 3B is a cross-sectional view of a part of a flange portion in the muffler of modification 1, as viewed from the side.
Fig. 3C is a side view of a portion including the inner end of the 1 st pipe in the muffler of modification 2.
Fig. 3D is a front view of the inner end of the 1 st pipe in the muffler of modification 2.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
The embodiments of the present disclosure are not limited to the embodiments described below, and may be implemented in various ways within the technical scope of the present disclosure.
[ description of the Structure ]
The muffler of the present embodiment is mounted on a vehicle, and exhaust gas from an engine of the vehicle flows downward in the muffler of the present embodiment. More specifically, the muffler may be mounted on, for example, an automobile rather than a motorcycle. In addition, the muffler may be mounted on a motorcycle, for example. As shown in fig. 1A, the muffler 1 has a shell member 2, a 1 st pipe 3, a 2 nd pipe 4, and a partition 5.
The shell member 2 is a member forming an outer surface of the muffler 1. The shell member 2 partitions the inside and outside of the muffler 1. The housing member 2 has an elongated shape extending in the extending direction 2 a. In addition, as an example, portions forming both ends of the case member 2 have a tapered shape, respectively. However, the portion may not have a tapered shape. Further, a 1 st outer hole 20 and a 2 nd outer hole 21 are provided at the center of the above portion in the extending direction 2a, respectively. The 1 st outer hole 20 has the same shape as the 1 st tube 3 in a cross section orthogonal to the longitudinal direction. On the other hand, the 2 nd outer hole 21 has the same shape as the cross section orthogonal to the longitudinal direction in the 2 nd pipe 4. In addition, the 1 st outer hole portion 20 and the 2 nd outer hole portion 21 are aligned along the extending direction 2a and face each other. The 1 st outer hole 20 and the 2 nd outer hole 21 may be directed in a direction different from the extending direction 2 a. The 1 st outer hole 20 and the 2 nd outer hole 21 may be arranged in a direction different from the extending direction 2 a.
The cross section of the case member 2 orthogonal to the extending direction 2a is, for example, circular. However, the housing member 2 may be formed in a cylindrical shape having a cross section other than a circular shape. Specifically, the cross section may be, for example, an ellipse, a polygon, or the like. In addition, as an example, the 1 st outer hole portion 20 is located on the downstream side in the flowing-down direction of the exhaust gas, and the 2 nd outer hole portion 21 is located on the upstream side in the flowing-down direction of the exhaust gas. That is, the exhaust gas flows into the interior of the muffler 1 from the 2 nd outer hole portion 21, and the exhaust gas flows out to the exterior of the muffler 1 from the 1 st outer hole portion 20. However, the 1 st outer hole 20 may be located upstream in the exhaust gas flowing down direction and the 2 nd outer hole 21 may be located downstream in the exhaust gas flowing down direction.
As shown in fig. 1B, the partition 5 is a circular plate-like member disposed inside the housing member 2 in a state orthogonal or substantially orthogonal to the extending direction 2 a. The partition 5 partitions the space inside the housing member 2 into a 1 st space 6 and a 2 nd space 7. The 1 st outer hole 20 communicates with the 1 st space 6, and the 2 nd outer hole 21 communicates with the 2 nd space 7. In addition, the partition 5 has 1 or more communication hole portions 56 communicating the 1 st space 6 and the 2 nd space 7.
In addition, the separator 5 has an abutting portion 57 surrounding the outer periphery thereof. The contact portion 57 is a flange-like portion protruding from an edge portion forming the outer periphery of the partition plate 5 toward the 2 nd space 7. The contact portion 57 may protrude into the 1 st space 6. The abutting portion 57 is in a state abutting against the inside of the housing member 2.
The separator 5 has a pipe hole 55 at the center thereof. As will be described later in detail, the flange portion 50 is provided at a portion where an edge portion surrounding the pipe hole portion 55 is formed. The 1 st tube 3 is inserted into the tube hole 55. The tube hole 55 has the same shape as the cross section orthogonal to the longitudinal direction in the 1 st tube 3.
The 1 st pipe 3 and the 2 nd pipe 4 are, for example, cylindrical and linearly extend along the extending direction 2 a. That is, the cross section of the 1 st tube 3 perpendicular to the longitudinal direction thereof and the cross section of the 2 nd tube 4 perpendicular to the longitudinal direction thereof are both circular. However, the cross section may be, for example, an oval shape, a polygonal shape, or the like. The 1 st and 2 nd tubes 3 and 4 may extend in a direction different from the extending direction 2 a. The 1 st and 2 nd pipes 3, 4 may be bent or curved.
The 1 st pipe 3 extends from the 1 st outer hole portion 20 to the inside of the housing part 2. Hereinafter, an end of the 1 st tube 3 located on the 1 st outer hole 20 side is referred to as an outer end 30, and an end of the 1 st tube 3 located on the opposite side from the outer end 30 is referred to as an inner end 31.
The 1 st tube 3 is disposed with the inner end 31 side thereof inserted into the tube hole 55 of the separator 5. The 1 st tube 3 is supported by the flange portion 50 of the separator 5 in a state where the side surface of the 1 st tube 3 located at the inner end 31 is movable in the extending direction 2 a. In fig. 1A, for convenience of explanation, the periphery of the flange portion 50 is shown in a perspective view. In other words, the extending direction 2a is a direction toward the insertion of the 1 st tube 3 into the tube hole 55 and a direction opposite to the above direction. Therefore, the opening of the inner end 31 of the 1 st tube 3 is in a state of communicating with the 2 nd space 7. In addition, a portion including the inner end 31 of the 1 st tube 3 protrudes into the 2 nd space 7. The 1 st pipe 3 may be disposed so as not to protrude into the 2 nd space 7. The openings of the 1 st tube 3 at the inner end 31 are all covered with the lid 32. Further, the lid portion 32 may be provided with 1 or more hole portions so that the lid portion 32 covers a part of the opening.
The side surface of the 1 st tube 3 located at the outer end 30 is attached to an edge surrounding the 1 st outer hole 20 by, for example, welding, caulking, or the like. Further, the portion of the 1 st tube 3 including the outer end 30 may be disposed in a state of protruding from the 1 st outer hole 20 to the outside of the housing member 2.
In addition, a plurality of 1 st side surface hole portions 33 and 34 are provided in a portion of the side surface of the 1 st pipe 3 located in the 1 st space 6. Specifically, 1 or more holes 33 are provided in the side surface of the 1 st tube 3 at a position near the separator 5. Further, 1 or more holes 34 are provided in a portion adjacent to the 1 st outer hole 20 in the side surface of the 1 st tube 3. Also, the plurality of 1 st side hole portions 33, 34 may be arranged to be located on the upper side when the muffler 1 is mounted on the vehicle. In addition, the 1 st tube 3 may be provided with 1 st side hole.
The 2 nd pipe 4 extends from the 2 nd outer hole 21, and one end is disposed in the 2 nd space 7. Hereinafter, an end of the 2 nd pipe 4 located on the 2 nd outer hole 21 side is referred to as an outer end 40, and an end of the 2 nd pipe 4 located on the opposite side from the outer end 40 is referred to as an inner end 41. In addition, for example, the 2 nd tube 4 is shorter than the 1 st tube 3 and is thicker than the 1 st tube 3. However, the 2 nd tube 4 may be thinner than the 1 st tube 3. The 2 nd tube 4 may be longer than the 1 st tube.
The side surface of the 2 nd pipe 4 located at the outer end 40 is attached to an edge surrounding the 2 nd outer hole 21 by, for example, welding, caulking, or the like. In addition, the inner end 41 of the 2 nd tube 4 is supported by the partition 5. Specifically, for example, the inner end 41 of the 2 nd tube 4 may be in a state of abutting against the partition 5. The inner end 41 of the 2 nd tube 4 may be attached to the separator 5 by welding, caulking, or the like.
At this time, the openings of the inner ends 41 of the 2 nd tubes 4 are all covered with the partition plate 5 and the lid 32. However, when the cover portion 32 has 1 or more hole portions, the opening of the inside end portion 41 is in a partially covered state. The inner end 41 of the 2 nd tube 4 may be in contact with the separator 5 without being attached to the separator 5. The inner end 41 of the 2 nd tube 4 may be separated from the separator 5.
Further, the inner end 41 of the 2 nd tube 4 covers the tube hole 55 of the separator 5. More specifically, the edge of the opening of the inner end 41 is disposed along the outside of the flange 50. Therefore, the flange portion 50 of the separator 5 and the portion of the 1 st tube 3 protruding into the 2 nd space 7 are located inside the 2 nd tube 4. The inner end 41 of the 2 nd tube 4 may cover a region of the separator 5 different from the tube hole 55.
In addition, 1 or more 2 nd side hole portions 42 are provided in the side surface of the 2 nd pipe 4. When the muffler 1 is mounted on the vehicle, 1 or more 2 nd side hole portions 42 may be arranged to be located on the upper side.
[ description of the Flange portion ]
As shown in fig. 2A and 2B, the flange portion 50 is provided at an edge portion of the separator 5 surrounding the tube hole portion 55. The flange portion 50 has a support portion 51. The support portion 51 protrudes from the edge portion surrounding the pipe hole portion 55 toward the 2 nd space 7. The support portion 51 surrounds the 1 st tube 3 inserted into the tube hole portion 55, and is in contact with the side surface of the 1 st tube 3. In addition, the region where the support portion 51 abuts the 1 st tube 3 is circumferentially surrounded on the side surface of the 1 st tube 3. In addition, the 1 st tube 3 is not attached to the support portion 51. Therefore, the 1 st tube 3 is supported by the support portion 51 in a state of being movable in the extending direction 2 a. Further, for example, a wire mesh may be disposed between the support portion 51 and the 1 st tube 3.
As shown in fig. 2B, the root of the support portion 51 is bent toward the 2 nd space 7. The inner surface 51a of the bent portion located inside the support portion 51 is provided with a rounded (in other words, curved) portion. The roundness (i.e., the radius R of the roundness) can be adjusted at any time.
Here, a portion of the separator 5 that abuts against the edge of the opening of the inner end 41 of the 2 nd tube 4 is referred to as an abutting portion 52. The abutment portion 52 is surrounded on the outside of the flange portion 50. For example, as shown in fig. 2C, the roundness of the inner surface 51a of the support portion 51 may be adjusted so that the inner surface 51a is curved over a range from a portion adjacent to the contact portion 52 to the distal end of the support portion 51.
In addition, as shown in fig. 2D, the flange portion 50 may have a step 53 in addition to the support portion 51 described above. Here, a plate-like portion of the partition 5 surrounding the support portion 51 is referred to as a wall portion 54. The step 53 is provided along the support portion 51 and on the wall portion 54 while surrounding the support portion 51. The step 53 is a portion of the wall portion 54 that is bent to protrude toward the 2 nd space 7 side (in other words, in the same direction as the protruding direction of the support portion 51).
Further, the edge of the opening of the inner end 41 of the 2 nd pipe 4 is disposed outside the step 53 along the step 53. In other words, the edge of the opening is disposed adjacent to the step 53. The edge of the opening may be disposed away from the step 53.
The support portion 51 of the flange portion 50, or the support portion 51 and the step 53 may be provided in the same manner in a state of protruding into the 1 st space 6.
[ modifications ]
Next, modifications 1 and 2 of the muffler 1 will be explained. The muffler 1 of modifications 1 and 2 has the same structure as that of the above embodiment, but the structure of the inner end 31 of the 1 st pipe 3 is different from that of the above embodiment.
That is, as shown in fig. 3A and 3B, in modification 1, the inner end 31 of the 1 st tube 3 is disposed in a state of protruding further toward the 2 nd space 7 side than in the above embodiment. Further, the muffler 1 of modification 1 does not have the lid portion 32 covering the opening of the inner end portion 31, and the portion including the inner end portion 31 has a shape (for example, a tapered shape or the like) that is tapered as it goes toward the inner end portion 31. The opening of the inner end 31 is smaller than the cross section of the 1 st tube 3 orthogonal to the longitudinal direction.
As shown in fig. 3C and 3D, in modification 2, the inner end 31 of the 1 st tube 3 is also disposed so as to protrude further toward the 2 nd space 7 than in the above embodiment, and the lid 32 covering the opening of the inner end 31 is not provided. In addition, the 1 st tube 3 deforms a portion including the inner end 31, thereby narrowing the opening of the inner end 31. Further, the inner end 31 may be completely closed by deforming the portion.
Specifically, for example, a portion including the inner end 31 is crushed into an X shape. That is, the portion is crushed so that the wall portions of the 1 st tube 3 are in a double-overlapped state. In addition, the double overlapping portion is arranged in an X-shape. An opening 31a is provided in the center of the inner end 31, and the opening 31a forms a gap in the wall of the X-shaped 1 st tube 3. The opening 31a communicates with the space inside the 1 st tube 3.
[ Effect ]
(1) According to the above embodiment, the partition 5 supports the inner end 31 of the 1 st tube 3 by surrounding the edge of the tube hole 55 in a state where the 1 st tube 3 is movable in the extending direction 2 a. Specifically, for example, the 1 st tube 3 can be moved in the extending direction 2a by sliding on an edge portion surrounding the tube hole portion 55. For example, the 1 st tube 3 may be moved in the extending direction 2a by flexing the partition plate 5.
The outer end 30 of the 1 st pipe 3 is attached to the edge of the housing member 2 surrounding the 1 st outer hole 20 by welding or the like. Therefore, the 1 st pipe 3 can be extended toward the partition 5 side while suppressing the 1 st pipe 3 from exerting a load on other members included in the muffler 1 at the time of thermal expansion. That is, the extension of the 1 st tube 3 due to thermal expansion can be absorbed. Therefore, the influence of thermal expansion can be suppressed.
In addition, the condensed water sometimes accumulates at the bottom of the housing member 2. The condensed water is water generated by condensation of water vapor contained in the exhaust gas. In contrast, when the 1 st pipe 3 and the edge portion of the jacket member 2 surrounding the 1 st outer hole 20 are welded, it is possible to suppress the occurrence of a gap between the 1 st pipe 3 and the edge portion surrounding the 1 st outer hole 20. Therefore, the condensed water accumulated in the bottom of the housing member 2 can be prevented from flowing out of the muffler 1 through the 1 st outer hole 20.
(2) In the flange portion 50 of the separator 5 provided at the edge portion surrounding the tube hole portion 55, the inner surface 51a at the root of the support portion 51 is provided with roundness. This enables the 1 st tube 3 to move more smoothly in the extending direction 2a when the 1 st tube 3 thermally expands. Therefore, the extension of the 1 st tube 3 due to thermal expansion can be more reliably absorbed.
(3) It is also conceivable to provide the flange 50 with a step 53. Even in the case described above, when the 1 st tube 3 is thermally expanded, the 1 st tube 3 can be moved more smoothly in the extending direction 2 a. Therefore, the extension of the 1 st tube 3 due to thermal expansion can be more reliably absorbed.
(4) Further, the opening edge of the inner end 41 of the 2 nd pipe 4 is disposed adjacent to the step 53 of the flange 50. Therefore, in the manufacturing process of the muffler 1, the position where the 2 nd pipe 4 is arranged can be determined based on the step 53 of the partition 5. Therefore, the 2 nd pipe 4 can be easily and reliably disposed, and the muffler 1 can be more easily manufactured.
(5) In addition, as the length of the tube increases, the degree of extension in the longitudinal direction due to thermal expansion becomes large. In contrast, according to the above embodiment, the elongation of the longer 1 st pipe 3 out of the 1 st pipe 3 and the 2 nd pipe 4 disposed in the muffler due to thermal expansion can be absorbed. Therefore, the influence of thermal expansion can be more favorably suppressed.
(6) In addition, in the above embodiment, the partition 5 supports the inner end 41 of the 2 nd tube 4 in addition to the 1 st tube 3. Therefore, the number of parts of the muffler 1 can be reduced.
(7) In the above embodiment, the inner end 41 of the 2 nd tube 4 is in a state of covering the tube hole 55 of the separator 5. That is, the 1 st pipe 3 is disposed inside the 2 nd pipe 4 so as to protrude into the 2 nd space 7. This arrangement allows the 1 st pipe 3 and the 2 nd pipe 4 to be aligned in a row, thereby reducing the size of the muffler 1.
(8) In addition, according to the above embodiment, when the exhaust gas flowing into the 2 nd pipe 4 passes through the 1 st or more 2 nd side hole portions 42, the flow of the exhaust gas expands. When the exhaust gas having passed through the 1 or more 2 nd side hole portions 42 passes through the 1 or more communication hole portions 56 in the partition plate 5, the flow of the exhaust gas is further expanded. That is, the flow of the exhaust gas is expanded at both of the 1 or more 2 nd side hole portions 42 in the 2 nd pipe 4 and the 1 or more communication hole portions 56 in the partition plate 5. Therefore, noise of the muffler can be suppressed satisfactorily.
In particular, in a non-motorcycle automobile, it is preferable to dispose the muffler at a position further forward in order to suppress noise caused by exhaust gas at a low speed. However, in the case where the muffler is disposed in the small-sized automobile in the above-described manner, the muffler needs to be downsized. Therefore, the internal space of the housing member 2 becomes small. In contrast, as in the above-described embodiment, the flow of the exhaust gas is expanded at two locations, whereby the noise can be effectively suppressed even if the internal space of the housing member 2 is small.
(9) In addition, according to the above embodiment, when the muffler 1 is mounted on the vehicle, 1 or more 1 st side hole portions 33, 34 in the 1 st pipe 3 and 1 or more 2 nd side hole portions 42 in the 2 nd pipe 4 are arranged to be located on the upper side. Therefore, the condensed water accumulated in the bottom of the housing member 2 can be suppressed from flowing into the 1 st tube 3 and the 2 nd tube 4. Therefore, the condensed water can be suppressed from flowing out to the outside through the 1 st outer hole 20 and the 2 nd outer hole 21.
[ other embodiments ]
(1) The shell member 2 of the muffler 1 of the above embodiment has an elongated cylindrical shape extending in the extending direction 2 a. However, the outer jacket member may also have a flat shape extending in the extending direction 2a and extending in a direction orthogonal or substantially orthogonal to the extending direction 2a, for example.
In the case of using the case member as described above, both or one of the 1 st outer hole portion 20 and the 2 nd outer hole portion 21 may be provided in a portion of the case member where the side surface is formed. Further, both or one of the 1 st tube 3 and the 2 nd tube 4 may be bent or folded, or the 1 st tube 3 and the 2 nd tube 4 may be supported by a separator as in the above embodiment.
(2) The plurality of functions of one component in the above embodiments may be realized by a plurality of components, or one function of one component may be realized by a plurality of components. Further, a plurality of functions provided by a plurality of components may be realized by one component, or one function realized by a plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted.
Claims (16)
1. A muffler mounted on a vehicle, the muffler characterized by comprising:
an outer shell member configured to form an outer surface of the muffler;
a partition plate having a plate shape, configured to partition a space inside the housing member into a 1 st space and a 2 nd space, and having a pipe hole portion; and
a 1 st pipe configured to extend from a 1 st outer hole provided in the shell member to an inside of the shell member in a state of communicating with the 1 st space, the 1 st pipe being disposed in a state of being inserted into the pipe hole,
the separator is configured such that the 1 st tube is supported by an edge portion of the separator surrounding the tube hole portion in a state where the 1 st tube is movable in a direction in which the 1 st tube is inserted into the tube hole portion and in a direction opposite to the direction,
the 1 st tube is attached to an edge portion of the housing member surrounding the 1 st outer hole portion,
the partition plate has a support portion and a wall portion,
the support portion is a portion protruding from an edge portion of the separator surrounding the pipe hole portion toward the 1 st space or the 2 nd space, and the support portion is configured to surround the 1 st pipe inserted into the pipe hole portion and support the 1 st pipe,
the wall portion is plate-shaped and configured to surround the support portion,
the wall portion is provided with a step that surrounds the support portion and protrudes in the same direction as the protruding direction of the support portion.
2. The muffler of claim 1,
further comprising a 2 nd pipe, wherein the 2 nd pipe is configured to extend from a 2 nd outer hole provided in the shell member in a state of communicating with the 2 nd space, and a 1 st end portion which is one end portion of the 2 nd pipe is disposed in the 2 nd space,
an edge of an opening of the 2 nd tube at the 1 st end is disposed along the step in the wall portion of the separator.
3. The muffler of claim 2,
the 2 nd tube is thicker than the 1 st tube.
4. The muffler of claim 2,
the 1 st end of the 2 nd tube is supported by the separator.
5. The muffler of claim 4,
the 1 st end portion of the 2 nd tube supported by the partition plate is disposed in a state of covering the tube hole portion.
6. The muffler according to any one of claims 1 to 5,
further comprising a lid configured to cover all or a part of an opening in the 1 st tube, the opening communicating with the 2 nd space,
the partition plate has 1 or more communication hole portions communicating the 1 st space and the 2 nd space,
the part of the side surface of the 1 st pipe located in the 1 st space is provided with 1 or more 1 st side surface hole parts.
7. The muffler of claim 6,
the 1 st or more side hole portions of the 1 st pipe are arranged to be located on an upper side when the muffler is mounted on the vehicle.
8. The muffler according to any one of claims 2 to 5,
the 2 nd pipe is covered with all or a part of the opening at the 1 st end, and 1 or more 2 nd side hole portions are provided on the side surface of the 2 nd pipe.
9. The muffler of claim 8,
the 1 or more 2 nd side hole portions in the 2 nd pipe are configured to be located on an upper side when the muffler is mounted on the vehicle.
10. A muffler mounted on a vehicle, the muffler characterized by comprising:
an outer shell member configured to form an outer surface of the muffler;
a partition plate having a plate shape, configured to partition a space inside the housing member into a 1 st space and a 2 nd space, and having a pipe hole portion; and
a 1 st pipe configured to extend from a 1 st outer hole provided in the shell member to an inside of the shell member in a state of communicating with the 1 st space, the 1 st pipe being disposed in a state of being inserted into the pipe hole,
the separator is configured such that the 1 st tube is supported by an edge portion of the separator surrounding the tube hole portion in a state where the 1 st tube is movable in a direction in which the 1 st tube is inserted into the tube hole portion and in a direction opposite to the direction,
the 1 st tube is attached to an edge portion of the housing member surrounding the 1 st outer hole portion,
the muffler further includes a 2 nd pipe shorter than the 1 st pipe, the 2 nd pipe being configured to extend from a 2 nd outer hole provided in the shell member in a state of communicating with the 2 nd space, and a 1 st end portion being one end portion of the 2 nd pipe being disposed in the 2 nd space,
said 1 st end of said 2 nd tube being supported by said baffle,
the 1 st end portion of the 2 nd tube supported by the partition plate is disposed in a state of covering the tube hole portion.
11. The muffler of claim 10,
the 2 nd tube is thicker than the 1 st tube.
12. The muffler of claim 10,
the partition plate has a support portion that protrudes from an edge portion of the partition plate surrounding the pipe hole portion toward the 1 st space or the 2 nd space, and the support portion is configured to surround the 1 st pipe inserted into the pipe hole portion and support the 1 st pipe,
the portion forming the bent portion of the root of the support portion and located inside the support portion is provided with a roundness.
13. The muffler according to any one of claims 10 to 12,
further comprising a lid configured to cover all or a part of an opening in the 1 st tube, the opening communicating with the 2 nd space,
the partition plate has 1 or more communication hole portions communicating the 1 st space and the 2 nd space,
the part of the side surface of the 1 st pipe located in the 1 st space is provided with 1 or more 1 st side surface hole parts.
14. The muffler of claim 13,
the 1 st or more side hole portions of the 1 st pipe are arranged to be located on an upper side when the muffler is mounted on the vehicle.
15. The muffler according to any one of claims 10 to 12,
the 2 nd pipe is covered with all or a part of the opening at the 1 st end, and 1 or more 2 nd side hole portions are provided on the side surface of the 2 nd pipe.
16. The muffler of claim 15,
the 1 or more 2 nd side hole portions in the 2 nd pipe are configured to be located on an upper side when the muffler is mounted on the vehicle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-005789 | 2017-01-17 | ||
| JP2017005789A JP6423462B2 (en) | 2017-01-17 | 2017-01-17 | Muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108331639A CN108331639A (en) | 2018-07-27 |
| CN108331639B true CN108331639B (en) | 2020-07-10 |
Family
ID=62924204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810034702.XA Active CN108331639B (en) | 2017-01-17 | 2018-01-15 | Silencer with improved structure |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6423462B2 (en) |
| CN (1) | CN108331639B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6981848B2 (en) * | 2017-11-08 | 2021-12-17 | トヨタ自動車株式会社 | Exhaust silencer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061055A (en) * | 2013-03-21 | 2014-09-24 | 本田技研工业株式会社 | Engine Muffler |
| CN105781679A (en) * | 2016-05-17 | 2016-07-20 | 上海天纳克排气系统有限公司 | Partition plate for muffler and muffler for baffle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5171457U (en) * | 1974-11-30 | 1976-06-05 | ||
| JP3508664B2 (en) * | 1999-12-22 | 2004-03-22 | トヨタ自動車株式会社 | Sub muffler |
| JP2002266624A (en) * | 2001-03-06 | 2002-09-18 | Sango Co Ltd | Muffler |
| US20060243521A1 (en) * | 2005-04-29 | 2006-11-02 | Samson Motorcycle Products, Inc. | Muffler with improved heat dissipation |
| JP2007270712A (en) * | 2006-03-31 | 2007-10-18 | Toyota Motor Corp | Silencer |
| JP2013221474A (en) * | 2012-04-18 | 2013-10-28 | Suzuki Motor Corp | Vehicle muffler structure and method for manufacturing vehicle muffler |
-
2017
- 2017-01-17 JP JP2017005789A patent/JP6423462B2/en active Active
-
2018
- 2018-01-15 CN CN201810034702.XA patent/CN108331639B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061055A (en) * | 2013-03-21 | 2014-09-24 | 本田技研工业株式会社 | Engine Muffler |
| CN105781679A (en) * | 2016-05-17 | 2016-07-20 | 上海天纳克排气系统有限公司 | Partition plate for muffler and muffler for baffle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018115576A (en) | 2018-07-26 |
| CN108331639A (en) | 2018-07-27 |
| JP6423462B2 (en) | 2018-11-14 |
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