WO2016132777A1 - マフラ - Google Patents

マフラ Download PDF

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Publication number
WO2016132777A1
WO2016132777A1 PCT/JP2016/050845 JP2016050845W WO2016132777A1 WO 2016132777 A1 WO2016132777 A1 WO 2016132777A1 JP 2016050845 W JP2016050845 W JP 2016050845W WO 2016132777 A1 WO2016132777 A1 WO 2016132777A1
Authority
WO
WIPO (PCT)
Prior art keywords
muffler
separator
exhaust path
partition
exhaust
Prior art date
Application number
PCT/JP2016/050845
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
岳広 三浦
貝沼　克彦
隼 多和田
Original Assignee
フタバ産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by フタバ産業株式会社 filed Critical フタバ産業株式会社
Priority to DE112016000827.9T priority Critical patent/DE112016000827B4/de
Priority to CN201680011031.4A priority patent/CN107250495B/zh
Publication of WO2016132777A1 publication Critical patent/WO2016132777A1/ja

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Classifications

    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/06—Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers

Definitions

  • This disclosure relates to mufflers.
  • the muffler is provided with a sound absorption chamber (noise reduction space) for reducing exhaust noise.
  • a sound absorption chamber noise reduction space
  • the muffler is constituted by a plurality of press-formed steel plate materials, there is a possibility that the arrangement position of the sound absorption chamber may be limited, or the exhaust noise may not be sufficiently suppressed.
  • One aspect of the present disclosure is a muffler that includes an outer shell member, an exhaust path, and at least one partition.
  • the outer shell member is provided with an inlet through which exhaust gas enters and an outlet through which exhaust gas is discharged.
  • the exhaust path is laminated in a predetermined lamination direction inside the outer shell member, and is formed by a plurality of exhaust path plate members formed in a predetermined shape by press molding, and enters from the inlet.
  • the exhaust gas is guided to the outlet.
  • the at least one partition is at least one plate-like member formed in a predetermined shape by press molding, and a silencing space that is a space for silencing inside the exhaust passage and other spaces Partition.
  • the at least one partition has a plurality of holes for guiding the exhaust gas flowing through the exhaust path to the silencing space, and is stacked in the stacking direction together with the plurality of exhaust path plate members.
  • the exhaust path and the silencing space are formed by stacking a plurality of press-formed plate members for exhaust path and at least one partition portion in a certain direction. For this reason, for example, the number of parts can be reduced and the assembly procedure can be simplified. Moreover, the arrangement section of the silencing space in the exhaust path can be determined flexibly. Thereby, the freedom degree of an internal structure improves. In addition, a sound deadening space is formed by at least one partition portion having a plate shape. For this reason, the area of the part which the noise reduction space and the space where exhaust gas flows down spreads. Thereby, the silencing performance is improved and the exhaust noise can be sufficiently suppressed.
  • the sound deadening space may be provided along the upper side wall of the exhaust path, and may be configured as a sound absorbing chamber in which a sound absorbing material is disposed.
  • a sound absorbing material is disposed in the sound deadening space, but if the sound absorbing material accumulates water, the sound deadening performance deteriorates.
  • the said structure it can suppress that water accumulates in a sound-absorbing material. As a result, it is possible to suppress a decrease in the silencing performance.
  • the silencing space may be configured as a gap between a portion of the plurality of exhaust path plate-like members forming the side wall of the exhaust path and at least one partition. According to such a configuration, a silencing space is formed by the side wall of the exhaust path and the partition portion. For this reason, it becomes possible to further reduce the number of parts and simplify the assembly procedure.
  • the muffler includes a plurality of partition portions as at least one partition portion, and the muffler space is configured as a gap between the plurality of partition portions stacked in the stacking direction together with the plurality of exhaust path plate-like members. May be.
  • any one of the plurality of exhaust path plate-like members is arranged in a state in which the inner space of the outer shell member is divided, and an outer edge thereof may be connected to the outer shell member. .
  • the strength of the muffler can be increased.
  • the exhaust path is connected to the outlet, and is provided as a gap between the outer edges of the plurality of exhaust path plate members constituting the part in a portion adjacent to the outlet on the side wall of the exhaust path. You may have an opening part.
  • air column resonance occurs when the energy of sound generated by the engine passes through the exhaust pipe.
  • air column resonance can be mitigated by forming an opening at the end of the exhaust path in the muffler. As a result, the silencing performance is improved.
  • FIG. 3A is a cross-sectional view of the exhaust path of the muffler of the first embodiment.
  • FIG. 3B is an enlarged view of the vicinity of the outlet of the muffler of the first embodiment.
  • 4A and 4B are explanatory diagrams of the manufacturing process of the muffler of the first embodiment. It is explanatory drawing of the manufacturing process of the muffler of 1st Embodiment. 6A and 6B are explanatory diagrams of the manufacturing process of the muffler of the first embodiment.
  • FIG. 19A is a perspective view of the muffler according to the eighth embodiment when viewed from the rear.
  • FIG. 19B is an enlarged view of the vicinity of the outlet of the muffler of the eighth embodiment.
  • partition 240 ... sound absorbing material, 250 ... cover pipe, 300 ... muffler, 301 ... exhaust path, 302 ... sound absorbing chamber, 310 ... outer shell member, 320 ... separator, 330 ... Partition part, 340 ... Sound absorbing material, 350 ... Cover pipe, 400 ... Muffler, 401 ... Exhaust passage, 402 ... Sound absorbing chamber, 410 ... Outer shell member, 420 ... Separator, 4 DESCRIPTION OF SYMBOLS 0 ... Partition part, 440 ... Sound absorption material, 450 ... Cover pipe, 500 ... Muffler, 520 ... Exhaust path, 530 ... Inlet part, 540 ... Separator, 600 ...
  • Muffler 601 ... Exhaust path, 610 ... First muffler shell, 620 ... Second muffler shell, 630 ... first separator, 640 ... second separator, 700 ... muffler, 701 ... exhaust passage, 702 ... exhaust passage opening, 703 ... sound absorption chamber, 710 ... outer shell member, 720 ... separator, 730 ... first 1 partition part, 740 ... sound absorbing material, 750 ... cover pipe, 760 ... 2nd partition part.
  • the muffler of the first embodiment discharges exhaust gas from an internal combustion engine of an automobile to the outside of the host vehicle.
  • the muffler reduces exhaust noise.
  • front side and the rear side of the host vehicle are referred to as front and rear.
  • right side and the left side of the host vehicle are the right and left, respectively.
  • the muffler 1 has a columnar shape with a substantially oval bottom (FIGS. 1 to 3). Inside the muffler 1, an exhaust gas path (exhaust path 2) that is a pipe extending in a G shape is provided.
  • the muffler 1 includes an outer shell member 10, a separator 20, a partition portion 30, a sound absorbing material 40, a cover pipe 50, and the like.
  • the outer shell member 10 covers the outside of the muffler 1.
  • the separator 20, the partition part 30, the sound absorbing material 40, and the cover pipe 50 are arranged in the internal space of the outer shell member 10.
  • These parts are made of stainless steel as an example. However, these parts may be made of a heat-resistant material other than stainless steel.
  • the outer shell member 10 includes muffler shells 11 and 12, outer plates 13 and 14, and the like. These are formed by press molding.
  • the outer plates 13 and 14 are horizontally long elliptical plate-like members.
  • the outer plates 13 and 14 are arranged facing each other in the front-rear direction.
  • the front outer plate 13 is provided with an exhaust gas inlet 13a at a position near the left end in the center in the vertical direction.
  • the outer edge of the outer plate 13 and the peripheral edge of the inlet 13a are L-shaped in cross section.
  • the rear outer plate 14 is provided with an exhaust gas outlet 14a at a position near the right end in the center in the vertical direction.
  • the outer edge of the outer plate 14 and the peripheral edge of the outlet 14a are L-shaped in cross section.
  • the muffler shells 11 and 12 are rectangular plate-like members curved in a U shape.
  • the muffler shells 11 and 12 are arranged in a state where the curved portions face each other in the vertical direction.
  • the muffler shells 11 and 12 are horizontally long.
  • the muffler shells 11 and 12 may have various shapes.
  • the separator 20, the partition part 30, and the cover pipe 50 are also plate-like members formed by press molding.
  • the separator 20, the partition part 30, the sound absorbing material 40, the cover pipe 50, and the muffler shells 11 and 12 are arranged in a stacked state in the vertical direction.
  • these portions are laminated in various directions other than the vertical direction, such as the left-right direction and the front-rear direction.
  • the separator 20 is arranged in a state where the inner space of the outer shell member 10 is vertically divided into two. In other words, the separator 20 is disposed in a state of covering the entire cross section in the left-right direction of the internal space.
  • the upper side of the separator 20 in the internal space is referred to as an upper space
  • the lower side is referred to as a lower space.
  • the separator 20 has a left edge 23, a front edge 24, a right edge 25, a rear edge 26, and the like. These are parts formed by bending the outer edge of the separator 20 into an L shape. The left edge portion 23 and the right edge portion 25 are joined to the edge portions 11 a and 12 a of the muffler shells 11 and 12.
  • an inlet 21 is provided at the left end of the front edge of the separator 20.
  • the inlet portion 21 is a rectangular plate-like portion curved in a U shape.
  • the inlet portion 21 is connected to an inlet 13 a provided in the front outer plate 13.
  • a central hole 27 is provided at the center of the separator 20. Further, the separator 20 is provided with a groove portion 28 that protrudes downward.
  • the groove part 28 has a U-shaped cross section.
  • the groove part 28 constitutes a G-shaped path.
  • the groove portion 28 extends from a position adjacent to the central hole portion 27 of the separator 20 to a right end position at the rear edge portion of the separator 20.
  • the partition part 30 is formed as a groove-like member protruding upward.
  • the partition part 30 has an ⁇ type cross section.
  • the cross section of the partition portion 30 is formed in a U shape in which a flange portion is provided in the opening portion.
  • the partition part 30 constitutes a G-shaped path similar to the groove part 28 of the separator 20.
  • the partition part 30 is arranged in a state facing the groove part 28.
  • a large number of small-diameter holes 31 are provided in the partition part 30.
  • the cover pipe 50 has an ⁇ -type cross section similar to that of the partition portion 30.
  • the cover pipe 50 is formed as a groove-like member protruding upward.
  • the cover pipe 50 constitutes a G-shaped path similar to the groove portion 28 and the partition portion 30 of the separator 20.
  • the cover pipe 50 is arranged in a state where the partition portion 30 is covered from the upper side. Thereby, a flat gap (sound absorbing chamber 4) is formed between the cover pipe 50 and the partition part 30.
  • the cover pipe 50 is arranged in a state of facing the groove portion 28 of the separator 20 located below the partition portion 30.
  • the sound absorbing chamber 4 is provided with a flat sound absorbing material 40 configured as, for example, glass wool.
  • the sound absorbing material 40 may be configured as a metal fiber such as stainless steel, for example.
  • the sound absorbing material 40 is disposed between the cover pipe 50 and the partition part 30.
  • an inlet 51 is provided at the left end of the front edge of the cover pipe 50.
  • the inlet 51 is a rectangular plate-like part curved in a U shape.
  • the inlet 51 is connected to an inlet 13 a provided in the front outer plate 13.
  • the gap between the groove portion 28 of the separator 20 and the cover pipe 50 becomes the exhaust path 2.
  • a position adjacent to the central hole portion 27 provided in the separator 20 is a starting point.
  • the outlet 14a of the rear outer plate 14 is the end point.
  • the exhaust path 2 is a G-shaped path extending from the start point to the end point.
  • the exhaust gas that has entered the muffler 1 from the inlet 13 a passes through the inlet 21 of the separator 20 and the inlet 51 of the cover pipe 50. Then, the exhaust gas enters either the upper space or the lower space. Thereafter, the exhaust gas enters the exhaust path 2 from a starting point located at the center of the internal space. Further, the exhaust gas passes through the exhaust path 2 and is discharged to the outside of the outer shell member 10 from the outlet 14a.
  • the exhaust gas flowing through the exhaust path 2 passes through the hole 31 of the partition part 30 and enters the sound absorption chamber 4. At this time, the exhaust gas contacts the sound absorbing material 40. Thereby, exhaust noise is suppressed.
  • an exhaust path opening 3 is provided on the side wall of the end point of the exhaust path 2 (the part adjacent to the outlet 14a in the exhaust path 2) (FIG. 3B).
  • the exhaust path opening 3 is provided at the joint between the cover pipe 50 and the separator 20.
  • the exhaust path opening 3 is formed as a gap (gap between the separator 20 and the cover pipe 50) between the outer edge of the separator 20 and the outer edge of the cover pipe 50 constituting the side wall.
  • the exhaust path opening 3 is surrounded by the outer edge of the separator 20, the outer edge of the cover pipe 50, the periphery of the outlet 14a, and the like.
  • the above-mentioned joint is formed on the side wall at the end point of the exhaust path 2 at two locations facing each other across the center of the exhaust path 2.
  • the exhaust path opening 3 may be provided at the joint between both. Further, the exhaust path opening 3 may be provided at one joint.
  • an exhaust pipe is connected to the inlet 13a of the muffler 1.
  • the exhaust pipe may be arranged in a state of being inserted into the outer shell member 10 from the inlet 13a.
  • the exhaust pipe may be disposed in a state of being sandwiched between the inlet portion 21 of the separator 20 and the inlet portion 51 of the cover pipe 50 at the inlet 13a.
  • An exhaust pipe is also connected to the outlet 14a.
  • the exhaust pipe may be arranged in a state of being inserted into the outer shell member 10 from the outlet 14a.
  • the exhaust pipe may be arranged in a state of being sandwiched between the end point portion of the groove portion 28 of the separator 20 and the end point portion of the cover pipe 50 at the outlet 14a portion.
  • these exhaust pipes may be arranged in contact with the inlet 13a and / or the outlet 14a, and may be connected to the inlet 13a and / or the outlet 14a by welding or the like. That is, these exhaust pipes may not be inserted into the inside from the inlet 13a and / or the outlet 14a. In this case, it is preferable to support the exhaust pipe from below, for example, near the inlet 13a and / or the outlet 14a.
  • the muffler 1 of the first embodiment is manufactured by the following process. (1) Step of creating each part Muffler shells 11 and 12, outer plates 13 and 14, outer plates 13 and 14, separators 20, and partitions included in the outer shell member 10 by press-molding plate-shaped stainless steel processed into a predetermined shape. The part 30 and the cover pipe 50 are created. The separator 20 and the cover pipe 50 are processed into a shape having the exhaust path opening 3 at the end point of the exhaust path 2. Also, the sound absorbing material 40 is created.
  • the partition portion 30, the sound absorbing material 40, and the cover pipe 50 are stacked in the vertical direction.
  • the sound absorbing material 40 has a G-shaped flat shape. More specifically, the sound absorbing material 40 is laminated in a state where the outside of the partition portion 30 is covered. Moreover, the cover pipe 50 is laminated
  • the sound absorbing chamber 4 is formed as a gap between the partition portion 30 and the cover pipe 50.
  • the sound absorbing chamber 4 is filled with a sound absorbing material 40.
  • Step (3) Step of creating an exhaust path
  • the partition portion 30, the sound absorbing material 40, the cover pipe 50, and the separator 20 stacked in step (2) are stacked in the vertical direction. More specifically, these are laminated in a state where the inside of the groove portion 28 of the separator 20 and the inside of the partition portion 30 face each other. And the cover pipe 50 and the separator 20 are joined by welding (FIG. 4B).
  • a gap is formed between the cover pipe 50 and the groove portion 28 of the separator 20.
  • the gap is defined as an exhaust path 2.
  • An exhaust path opening 3 is formed at the end point of the exhaust path 2.
  • Step of joining separator 20 and outer shell member 10 Welding is performed along weld line 60 to separator 20 stacked in step (4), muffler shells 11 and 12 of outer shell member 10, and the like. As a result, the left and right edges 11a, 12a of the muffler shells 11, 12 are joined. Moreover, this joins the edge parts 11a and 12a, and the left edge part 23 and the right edge part 25 of the separator 20 (FIG. 6A). In addition, you may join by methods other than welding (for example, caulking etc.).
  • Step of joining outer shell member 10 Welding is performed along welding line 61. Thereby, the outer plates 13 and 14 arranged in the step (6) and the muffler shells 11 and 12 are joined (FIG. 7). In addition, you may join these by methods other than welding.
  • the muffler 100 of the second embodiment has a columnar shape having a substantially elliptical bottom surface.
  • the muffler 100 includes an outer shell member 110, a sound absorbing material 140, a separator 120, a partition portion 130, a cover pipe 150, and the like (FIGS. 8 and 9).
  • the separator 120, the partition part 130, and the cover pipe 150 are plate-shaped members. These are made of the same material as in the first embodiment.
  • the outer shell member 110 includes plate-shaped muffler shells 111 and 112 and outer plates 113 and 114. Further, the muffler shells 111 and 112, the outer plates 113 and 114, the separator 120, the partition portion 130, the cover pipe 150, and the like are formed by press-molding a plate-like member as in the first embodiment. .
  • the exhaust path 101 is U-shaped.
  • the muffler 100 is different from the first embodiment in this respect and the like.
  • the muffler 100 of 2nd Embodiment is demonstrated centering on difference with 1st Embodiment.
  • the front outer plate 113 has an exhaust gas inlet 113a at an upper position and slightly to the right from the center in the left-right direction.
  • the rear outer plate 114 has an exhaust gas outlet 114a at a lower position and slightly to the left from the center in the left-right direction.
  • the muffler shells 111 and 112 are rectangular plate-like members that are curved in a U-shape. The muffler shells 111 and 112 are arranged facing each other in the left-right direction.
  • the separator 120, the partition part 130, the sound absorbing material 140, and the cover pipe 150 are arranged in a state inclined at a predetermined angle with respect to the left-right direction. Furthermore, the separator 120, the partition part 130, the sound absorbing material 140, the cover pipe 150, and the muffler shells 111 and 112 are arranged in a state of being stacked in the left-right direction. Of course, it is conceivable that these portions are laminated in various directions such as the vertical direction and the front-back direction.
  • the separator 120 is disposed in a state where the inner space of the outer shell member 110 is divided into left and right parts (FIG. 9). In other words, the separator 120 is disposed in a state of covering the entire cross section in the left-right direction of the internal space.
  • the right side of the separator 120 in the inner space of the outer shell member 110 is referred to as a right side space
  • the left side is referred to as a left side space.
  • the separator 120 has a groove 121.
  • the groove 121 has a U-shaped cross section. Moreover, the groove part 121 protrudes to the upper right.
  • the groove 121 constitutes a U-shaped path.
  • the groove 121 extends from a position adjacent to one end of the rear edge of the separator 120 to a position adjacent to the other end of the edge. And the end point is connected with exit 114a.
  • the outlet 114 a is provided in the rear outer plate 114.
  • the separator 120 is in a state where the upper and lower edge portions 122 and 123 are joined to the end portions 111a and 112a of the muffler shells 111 and 112, respectively.
  • the partition part 130 is an ⁇ -type cross section similar to that of the partition part 30 of the first embodiment.
  • the partition part 130 is a groove-shaped member that protrudes to the upper right.
  • the partition part 130 constitutes a U-shaped path similar to the groove part 121 of the separator 120.
  • the partition part 130 is distribute
  • a flat sound absorbing material 140 is disposed in the sound absorbing chamber 102. That is, the sound absorbing material 140 is arranged in a state of being sandwiched between the partition part 130 and the groove part 121.
  • the partition 130 is provided with a large number of small-diameter holes 131.
  • the cover pipe 150 has an ⁇ -type cross section similar to that of the partition portion 130.
  • the cover pipe 150 is a groove-like member that protrudes to the lower left.
  • the cover pipe 150 forms a U-shaped path similar to the groove 121 and the partition 130 of the separator 120. One end of the path is connected to the outlet 114a of the rear outer plate 114.
  • the cover pipe 150 is arranged in a state of facing the partition part 130 and the groove part 121 of the separator 120.
  • the gap between the groove 121 of the separator 120 and the cover pipe 150 forms a U-shaped exhaust path 101.
  • the starting point of the exhaust path 101 is the front of the rear outer plate 114 on the upper side of the inner space of the outer shell member 110, and is a position that is shifted to the left from the center in the left-right direction.
  • the end point of the exhaust path 101 is the outlet 114 a of the outer plate 114.
  • the exhaust gas that has entered the internal space from the inlet 113a enters the right space. Thereafter, the exhaust gas enters the exhaust path 101 from the starting point.
  • the starting point is located in front of the rear outer plate 114.
  • the exhaust gas passes through the exhaust path 101 and is discharged from the outlet 114a to the outside of the outer shell member 110.
  • the exhaust gas flowing through the exhaust path 101 passes through the hole 131 of the partition part 130 and enters the sound absorption chamber 102. As a result, the exhaust gas contacts the sound absorbing material 140. As a result, exhaust noise is suppressed.
  • an exhaust path opening is formed at the joint between the cover pipe 150 and the separator 120 on the side wall at the end point of the exhaust path 101 as in the first embodiment.
  • the end point portion of the exhaust path 101 is a part adjacent to the outlet 114a in the exhaust path 101.
  • the muffler 200 of the third embodiment includes an outer shell member 210, a sound absorbing material 240, a separator 220, a partition portion 230, a cover pipe 250, and the like (FIGS. 10 and 11).
  • the separator 220, the partition part 230, and the cover pipe 250 are plate-shaped members. These are made of the same material as in the first embodiment.
  • the outer shell member 210 includes plate-shaped muffler shells 211 and 212 and outer plates 213 and 214.
  • the muffler shells 211 and 212, the outer plates 213 and 214, the separator 220, the partition portion 230, the cover pipe 250, and the like are formed by press-molding a plate-like member as in the first embodiment.
  • the muffler 200 of the third embodiment is different from the first embodiment.
  • One of the differences is that the shape of the muffler 200 is cylindrical.
  • One of the differences is that an exhaust gas inlet 211 a is provided in the front muffler shell 211.
  • One of the differences is that the exhaust path 201 is linear.
  • the muffler 200 of 3rd Embodiment is demonstrated centering around difference with 1st Embodiment.
  • the outer shell member 210 has a cylindrical shape.
  • the outer shell member 210 includes outer plates 213 and 214, muffler shells 211 and 212, and the like.
  • the outer plates 213 and 214 are circular and correspond to the bottom surface of the cylinder.
  • the muffler shells 211 and 212 have a semicircular cross section.
  • the muffler shells 211 and 212 constitute the side surface of the cylinder.
  • the muffler shells 211 and 212 are arranged facing each other in the front-rear direction.
  • the outer plates 213 and 214 are arranged in a state of facing in the left-right direction.
  • An exhaust gas inlet 211 a is provided in the front muffler shell 211.
  • One outer plate 214 is provided with an exhaust gas outlet 214a.
  • the side of the outer shell member 210 where the outlet 214a is provided is referred to as the outlet side.
  • the separator 220, the partition part 230, the sound absorbing material 240, the cover pipe 250, and the muffler shells 211 and 212 are arranged in a stacked state in the front-rear direction.
  • these portions are laminated in various directions such as the vertical direction and the horizontal direction.
  • the separator 220 has an elongated, substantially rectangular shape.
  • the length of the separator 220 in the longitudinal direction is shorter than the length of the cylindrical outer shell member 210 in the longitudinal direction (left-right direction).
  • a gap is provided between the end of the separator 220 that is not on the outlet side and the outer plate 213.
  • the separator 220 is arranged in a state where the internal space of the outer shell member 210 is divided into two parts in the front-rear direction (FIG. 11). In other words, the separator 220 is disposed in a state of covering the entire cross section of the internal space.
  • the front side of the separator 220 in the inner space of the outer shell member 210 is referred to as a front side space
  • the rear side is referred to as a rear side space.
  • the separator 220 has a groove portion 221 that protrudes rearward.
  • the groove part 221 has a semicircular cross section.
  • the groove part 221 constitutes a linear path.
  • the groove 221 extends from one end of the separator 220 in the left-right direction to the other end.
  • One end of the groove 221 is connected to an outlet 214 a provided in the outer plate 214.
  • the separator 220 has a circular hole 222.
  • the hole 222 is located at the center of the separator 220 in the left-right direction and above the groove 221. Further, the separator 220 is in a state in which the long side edges 223 and 224 are joined to the edges 211b and 212a of the muffler shells 211 and 212 in the same manner as in the first embodiment.
  • the partition part 230 has a semicircular cross section. Moreover, the partition part 230 is a groove-shaped member which protrudes ahead. The partition part 230 forms a linear path, like the groove part 221 of the separator 220. The partition part 230 is distribute
  • the cross section of the cover pipe 250 is semicircular.
  • the cover pipe 250 is a groove-like member that protrudes forward.
  • the cover pipe 250 forms a straight path, like the groove 221 and the partition 230 of the separator 220.
  • One end of the cover pipe 250 is connected to the outlet 214 a of the outer plate 214.
  • the cover pipe 250 is arranged in a state where the partition portion 230 is covered from the front side. Thereby, a flat gap (sound absorbing chamber 202) is formed between the cover pipe 250 and the partition portion 230.
  • the cover pipe 250 is disposed in a state of facing the groove portion 221 of the separator 220 located behind the partition portion 230.
  • a flat sound absorbing material 240 is disposed in the sound absorbing chamber 202.
  • the sound absorbing material 240 is sandwiched between the cover pipe 250 and the partition portion 230.
  • the cover pipe 250 is arranged in a state where a gap is provided between the cover pipe 250 and the outer plate 213.
  • the gap between the groove 221 of the separator 220 and the cover pipe 250 forms a linear exhaust path 201.
  • the exhaust path 201 starts from the position in front of the outer plate 213 where no outlet is provided. Further, the exhaust path 201 has an exit 214a as an end point.
  • a cylindrical inlet pipe 202 is inserted into the inlet 211a of the muffler shell 211 and the hole 222 of the separator 220.
  • One end of the inlet pipe 202 is located outside the muffler 200 (in front of the muffler shell 211).
  • the other end of the inlet pipe 202 is located in the rear space.
  • the inlet pipe 202 may be configured as a part of the muffler 200. Further, the inlet pipe 202 may be configured as a part different from the muffler 200.
  • the exhaust gas that has entered the muffler 200 from one end of the inlet pipe 202 first enters the rear space. Thereafter, the exhaust gas enters the exhaust path 201 through the gap between the separator 220 and the cover pipe 250 and the outer plate 213. The exhaust gas passes through the exhaust path 201 and is discharged from the outlet 214a to the outside of the outer shell member 210.
  • the exhaust gas flowing through the exhaust path 201 passes through the hole 231 of the partition part 230 and enters the sound absorption chamber 202. At this time, the exhaust gas contacts the sound absorbing material 240. Thereby, exhaust noise is suppressed.
  • an exhaust path opening is formed at the joint between the cover pipe 250 and the separator 220 on the side wall at the end point of the exhaust path, as in the first embodiment. Note that the end point portion of the exhaust path is a portion adjacent to the outlet 214a in the exhaust path.
  • the outlet 214a of the muffler 200 is connected to the exhaust pipe in the same manner as in the first embodiment.
  • the muffler 300 of the fourth embodiment includes an outer shell member 310, a sound absorbing material 340, a separator 320, a partition portion 330, a cover pipe 350, and the like (FIGS. 12 and 13).
  • the separator 320, the partition part 330, and the cover pipe 350 are plate-shaped members. These are made of the same material as in the third embodiment.
  • the outer shell member 310 includes plate-like muffler shells 311 and 312 and outer plates 313 and 314.
  • the muffler shells 311 and 312, the outer plates 313 and 314, the separator 320, the partition portion 330, the cover pipe 350, and the like are formed by press-molding a plate-like member as in the third embodiment.
  • the muffler 300 of the fourth embodiment differs from the third embodiment in the shapes of the separator 320, the partition 330, the cover pipe 350, and the like, the positions of the inlet 313a and the outlet 314a, and the like.
  • the muffler 300 of 4th Embodiment is demonstrated centering on difference with 3rd Embodiment.
  • the outer shell member 310 has a cylindrical shape.
  • the outer shell member 310 includes outer plates 313 and 314 having the same shape as that of the third embodiment, muffler shells 311 and 312, and the like.
  • the muffler shells 311 and 312 are arranged facing each other in a direction (stacking direction) inclined by a predetermined angle (for example, 45 °) with respect to the front-rear direction.
  • the outer plates 313 and 314 are arranged in a state of facing in the left-right direction.
  • One outer plate 313 has an exhaust gas inlet 313a.
  • the other outer plate 314 has an exhaust gas outlet 314a.
  • the side where the inlet 313a is formed in the outer shell member 310 is referred to as an inlet side
  • the side where the outlet 314a is formed is referred to as an outlet side.
  • the separator 320, the partition part 330, the sound absorbing material 340, the cover pipe 350, and the muffler shells 311 and 312 are arranged in a state of being stacked in the above-described stacking direction.
  • these portions may be stacked in various directions such as the up-down direction, the left-right direction, and the front-rear direction.
  • the separator 320 has an elongated shape.
  • the separator 320 is arranged in a state orthogonal to the stacking direction. At this time, the separator 320 is arranged in a state where the internal space of the outer shell member 310 is divided into two (FIG. 13). In other words, at this time, the separator 320 is disposed in a state of covering the entire cross section of the internal space.
  • the front side (lower side) of the separator 320 in the inner space of the outer shell member 310 is referred to as a front side space
  • the rear side (upper side) is referred to as a rear side space.
  • the separator 320 has a groove portion 321 protruding downward on the front side.
  • the groove part 321 has a semicircular cross section.
  • the groove portion 321 constitutes a linear path.
  • the groove portion 321 extends from one end of the separator 320 in the left-right direction to the other end.
  • One end of the groove 321 is connected to an outlet 314 a provided in the outer plate 314.
  • the separator 320 has an elongated rectangular opening 322.
  • the opening 322 is adjacent to the groove 321.
  • the separator 320 has an inlet portion 323 adjacent to the end portion of the opening portion 322 on the inlet side.
  • the inlet portion 323 has a semicircular cross section.
  • the inlet portion 323 is connected to an inlet 313 a provided in the outer plate 313.
  • the inlet portion 323 is arranged at a position protruding from the end portion of the groove portion 321 toward the inlet side.
  • the partition part 330 is a groove-like member protruding upward on the rear side.
  • the partition 330 has a semicircular cross section.
  • the partition part 330 forms a linear path, like the groove part 321 of the separator 320.
  • the partition part 330 is distribute
  • the cover pipe 350 is a groove-shaped member protruding upward on the rear side.
  • the cover pipe 350 has a semicircular cross section.
  • the cover pipe 350 forms a straight path, like the groove part 321 and the partition part 330 of the separator 320.
  • One end of the cover pipe 350 is connected to the outlet 314 a of the outer plate 314.
  • an inlet portion 351 is provided on the other end side of the cover pipe 350.
  • the inlet portion 351 has a semicircular cross section.
  • the inlet portion 351 is connected to the inlet 313 a of the outer plate 313.
  • the inlet portion 351 is located on the side of the linear groove path of the cover pipe 350. Further, the inlet portion 351 is disposed at a position protruding from the end portion of the path toward the inlet side.
  • the cover pipe 350 is arranged in a state of covering the partition portion 330 from the upper rear side.
  • a flat gap sound absorbing chamber 302
  • the cover pipe 350 is disposed in a state of facing the groove portion 321 of the separator 320.
  • the separator 320 is located below the front side of the partition part 330.
  • the sound absorbing chamber 302 is provided with a flat sound absorbing material 340.
  • the sound absorbing material 340 is disposed in a state of being sandwiched between the cover pipe 350 and the partition portion 330.
  • the gap between the groove 321 of the separator 320 and the cover pipe 350 is a straight exhaust path 301.
  • the exhaust path 301 starts from the vicinity of one end in the left-right direction of the inner space of the outer shell member 310 (the vicinity where the inlet 313a is located). Further, the exhaust path 301 has an outlet 314a positioned at the other end in the left-right direction of the internal space of the outer shell member 310 as an end point.
  • the exhaust gas that has entered the muffler 300 from the inlet 313a enters the front space and the rear space. Thereafter, the exhaust gas enters the exhaust path 301 from the end on the inlet side. Then, the exhaust gas passes through the exhaust path 301 and is discharged from the outlet 314a to the outside of the outer shell member 310.
  • the exhaust gas flowing through the exhaust path 301 passes through the hole 331 of the partition part 330 and enters the sound absorption chamber 302. At this time, the exhaust gas contacts the sound absorbing material 340. Thereby, exhaust noise is suppressed.
  • an exhaust path opening is formed on the side wall of the end point of the exhaust path at the joint between the cover pipe 350 and the separator 320 in the same manner as in the first embodiment.
  • the end point portion of the exhaust path is, in other words, the portion adjacent to the outlet 314a in the exhaust path.
  • the muffler 400 of the fifth embodiment includes an outer shell member 410, a sound absorbing material 440, a separator 420, a partition portion 430, a cover pipe 450, and the like (FIGS. 14 and 15).
  • the separator 420, the partition part 430, and the cover pipe 450 are plate-shaped members. These are made of the same material as in the fourth embodiment.
  • the outer shell member 410 includes plate-like muffler shells 411 and 412 and outer plates 413 and 414.
  • the muffler shells 411 and 412, the outer plates 413 and 414, the separator 420, the partition part 430, the cover pipe 450, and the like are formed by press-molding a plate-like member as in the fourth embodiment.
  • the muffler 400 of the fifth embodiment differs from the fourth embodiment in the shapes of the separator 420, the cover pipe 450, and the like, the positions of the inlet 414a and the outlet 414b, and the like.
  • the muffler 400 of 5th Embodiment is demonstrated centering on difference with 4th Embodiment.
  • the outer shell member 410 has a cylindrical shape.
  • the outer shell member 410 includes outer plates 413 and 414 and muffler shells 411 and 412 having the same shape as that of the fourth embodiment.
  • the muffler shells 411 and 412 are arranged facing each other in the stacking direction similar to the fourth embodiment. Further, the outer plates 413 and 414 are arranged in a state of facing in the left-right direction.
  • One outer plate 414 is provided with an exhaust gas inlet 414a and an outlet 414b.
  • the side provided with the inlet 414a and the like in the outer shell member 410 is referred to as the inlet side.
  • the separator 420, the partition portion 430, the sound absorbing material 440, the cover pipe 450, and the muffler shells 411 and 412 are arranged in a state of being stacked in the above-described stacking direction.
  • these portions may be stacked in various directions such as the up-down direction, the left-right direction, and the front-rear direction.
  • the separator 420 has an elongated shape.
  • the separator 420 is arranged in a state orthogonal to the stacking direction. At this time, the separator 420 is disposed in a state where the inner space of the outer shell member 410 is divided into two (FIG. 15). In other words, at this time, the separator 420 is disposed in a state of covering the entire cross section of the internal space.
  • the front side (lower side) of the separator 420 in the inner space of the outer shell member 410 is referred to as a front side space
  • the rear side (upper side) is referred to as a rear side space.
  • the separator 420 has a groove portion 421 that protrudes downward on the front side.
  • the groove portion 421 has a semicircular cross section.
  • the groove part 421 constitutes a linear path.
  • the groove portion 421 extends from one end of the separator 420 in the left-right direction to the other end.
  • One end of the groove 421 is connected to an outlet 414 b provided in the outer plate 414.
  • the separator 420 has an inlet portion.
  • the inlet portion is adjacent to a portion connected to the outlet 414b in the groove portion 421.
  • the inlet portion has a semicircular cross section.
  • the inlet portion is connected to an inlet 414 a provided on the outer plate 414.
  • the inlet part is located on the side of the groove part 421.
  • the separator 420 has a frame portion 422.
  • the frame part 422 extends parallel to the groove part 421.
  • the frame part 422 is connected to the side part of the entrance part.
  • the inlet portion is located between the end portion on the inlet side of the frame portion 422 and the end portion on the inlet side of the groove portion 421.
  • An elongated opening is provided between the groove 421 and the frame 422.
  • edge portion 423 and the frame portion 422 are joined to the edge portions 411a and 412a of the muffler shells 411 and 412 as in the fourth embodiment. Note that the edge portion 423 is adjacent to the groove portion 421.
  • the partition part 430 is configured similarly to the fourth embodiment.
  • the cover pipe 450 is a groove-like member protruding upward on the rear side.
  • the cover pipe 450 has a semicircular cross section.
  • the cover pipe 450 forms a straight path, like the groove part 421 and the partition part 430 of the separator 420.
  • One end of the cover pipe 450 is connected to the outlet 414 b of the outer plate 414.
  • the cover pipe 450 has an inlet portion 451 having a semicircular cross section.
  • the inlet portion 451 is adjacent to a portion of the cover pipe 450 that is connected to the outlet 414b.
  • the inlet portion 451 is connected to an inlet 414 a provided in the outer plate 414.
  • the inlet portion 451 is located on the side of a linear groove path provided in the cover pipe 450.
  • the cover pipe 450 is disposed in a state where the partition portion 430 is covered from the upper rear side. At this time, a flat gap (sound absorbing chamber 402) is formed between the cover pipe 450 and the partition portion 430.
  • the cover pipe 450 is disposed so as to face the groove 421 of the separator 420.
  • the groove part 421 is located below the front side of the partition part 430.
  • the sound absorbing chamber 402 is provided with a flat sound absorbing material 440. The sound absorbing material 440 is disposed in a state sandwiched between the cover pipe 450 and the partition portion 430.
  • the gap between the groove 421 of the separator 420 and the cover pipe 450 forms a linear exhaust path 401.
  • the exhaust path 401 starts from the vicinity of the end of the inner space of the outer shell member 410 that is not the inlet side. Further, the exhaust path 401 has an exit 414b as an end point.
  • the exhaust gas that has entered the muffler 400 from the inlet 414a enters the front space and the rear space. Thereafter, the exhaust gas enters the exhaust path 401 from the vicinity of the end portion that is not on the inlet side. The exhaust gas passes through the exhaust path 401 and is discharged from the outlet 414b to the outside of the outer shell member 410.
  • the exhaust gas flowing through the exhaust path 401 passes through the hole 431 of the partition part 430 and enters the sound absorption chamber 402. At this time, the exhaust gas contacts the sound absorbing material 440. Thereby, exhaust noise is suppressed.
  • an exhaust path opening is formed at the joint between the cover pipe 450 and the separator 420 on the side wall at the end point of the exhaust path 401 in the same manner as in the first embodiment.
  • the end point portion of the exhaust path 401 is, in other words, a portion adjacent to the outlet 414b in the exhaust path 401.
  • the inlet 414a and the outlet 414b of the muffler 400 are connected to the exhaust pipe in the same manner as in the first embodiment.
  • the muffler 500 of the sixth embodiment has a columnar shape having a substantially elliptical bottom surface.
  • the muffler 500 includes an outer shell member similar to that of the first embodiment, an exhaust path 520, an inlet portion 530, and the like (FIG. 16).
  • the outer shell member has two outer plates and one muffler shell 510.
  • the muffler 500 of the sixth embodiment is different from the first embodiment in that the separator 540 and the muffler shell 510 constituting the exhaust path 520 are integrally formed. Below, the muffler 500 of 6th Embodiment is demonstrated centering on this difference.
  • the two substantially elliptical outer plates corresponding to the bottom surface of the outer shell member are configured in the same manner as in the first embodiment.
  • Each outer plate has an exhaust gas inlet and outlet.
  • these outer plates are arranged facing each other in a predetermined direction.
  • the side surface of the outer shell member is constituted by a single strip-shaped muffler shell 510. These members are made of the same material as in the first embodiment.
  • An exhaust passage 520 and an inlet portion 530 are arranged inside the outer shell member.
  • the inlet portion 530 has a cylindrical shape.
  • the inlet part 530 is connected with the inlet provided in the outer plate.
  • the exhaust path 520 is formed in an S shape. The exhaust path 520 extends from a position in front of the inlet portion 530 to an outlet formed in the outer plate.
  • the exhaust path 520 and the inlet portion 530 have a predetermined stacking direction in which a separator 540, which is a press-molded plate member, a partition portion, a cover pipe, and a flat sound absorbing material are predetermined. It is comprised by laminating. These members are made of the same material as in the first embodiment. These members are arranged along the direction of the major axis of each outer plate.
  • the separator 540 is disposed in a state where the inner space of the outer shell member is divided into two in the stacking direction. In other words, the separator 540 is disposed so as to cover the entire cross section of the internal space.
  • segmented into two with the separator 540 be the 1st space and the 2nd space, respectively.
  • the muffler shell 510 and the separator 540 are configured as a single strip member. A portion located at the end of the belt-like member is press-molded and used as the separator 540. Further, the remaining part of the belt-shaped member is used as the muffler shell 510.
  • a portion (separator 540) located at the end of the press-formed belt-like member is laminated together with a partition portion, a cover pipe, a sound absorbing material, and the like. Thereby, the exhaust path 520 and the inlet part 530 are formed.
  • the remaining part of the belt-shaped member is circulated.
  • the periphery of the exhaust path 520 and the inlet portion 530 is covered by the portion (the muffler shell 510).
  • the edge of the separator 540 and the muffler shell 510 are joined by welding or the like.
  • an outer plate is arrange
  • FIG. the muffler 500 is configured.
  • the exhaust gas that has entered the muffler 500 from the inlet passes through the inlet portion 530 and enters the first and second spaces. Thereafter, the exhaust gas enters the exhaust path 520 from a starting point located in front of the inlet portion 530. Further, the exhaust gas passes through the exhaust path 520 and is discharged from the outlet to the outside of the outer shell member. Further, the exhaust gas flowing through the exhaust path 520 passes through the hole of the partition part and enters the sound absorption chamber. At this time, the exhaust gas contacts a sound absorbing material disposed in the sound absorbing chamber. Thereby, exhaust noise is suppressed.
  • the muffler 600 of the seventh embodiment has a columnar shape having a substantially elliptical bottom surface as in the sixth embodiment.
  • the muffler 600 includes an outer shell member, an exhaust path 601 disposed inside the outer shell member, an inlet portion 602, and the like (FIG. 17). However, these parts have a configuration different from that of the sixth embodiment. Below, the muffler 600 of 7th Embodiment is demonstrated centering on this difference.
  • the muffler 600 has the same two outer plates as in the sixth embodiment. These outer plates correspond to the bottom surface of the outer shell member having a columnar shape. Moreover, these outer plates have a substantially elliptical shape. Each outer plate is provided with an exhaust gas inlet and outlet. Moreover, these outer plates are arranged in a state facing each other in a predetermined direction.
  • the muffler 600 has two muffler shells (first and second muffler shells 610 and 620). These muffler shells correspond to the side surfaces of the outer shell member. These members are made of the same material as in the first embodiment.
  • An exhaust passage 601 and an inlet portion 602 are provided inside the outer shell member.
  • the inlet portion 602 has a cylindrical shape. And the inlet part 602 is connected with the inlet provided in the outer plate.
  • the exhaust path 601 is formed in a G shape. The exhaust path 601 extends from the center of the inner space of the outer shell member to the outlet provided in the outer plate. Further, a sound absorbing portion 650 is provided in a section before the outlet in the exhaust path 601.
  • the exhaust path 601 and the inlet 602 are configured as a gap between two separators (first and second separators 630 and 640) stacked in a predetermined stacking direction.
  • the first separator 630 includes a G-shaped exhaust passage groove 631 and a linear inlet groove 632.
  • the second separator 640 includes a G-shaped exhaust passage groove 641 similar to the exhaust passage groove 631 and a linear inlet groove 642 similar to the inlet groove 632.
  • the surface of the first and second separators 630 and 640 where the opening of the groove is formed is referred to as the front surface, and the opposite surface is referred to as the back surface.
  • the cross sections of the exhaust passage groove portions 631 and 632 of the first separator 630 and the exhaust passage groove portions 641 and 642 of the second separator 640 are U-shaped. And the 1st, 2nd separator 630,640 is laminated
  • a sound absorbing section 650 is disposed in the sound absorbing section.
  • the sound absorbing unit 650 includes a cylindrical partition member 651 and a flat sound absorbing material 652.
  • the sound absorbing material 652 is disposed outside the partition member 651.
  • the partition member 651 is provided with a large number of small-diameter holes (not shown) as in the first to sixth embodiments. Then, it is assumed that the first and second separators 630 and 640 are stacked in a state where the sound absorbing portion 650 is arranged in the sound absorbing section.
  • a gap is formed between the partition member 651 and the portion that forms the wall portion of the sound absorption section in the exhaust path groove portions 631 and 641.
  • the gap becomes a sound absorption chamber.
  • the sound absorbing chamber is filled with the sound absorbing material 652.
  • the sound absorbing material 652 is sandwiched between the partition member 651 and the wall portion of the sound absorbing section in the exhaust path groove portions 631 and 641.
  • the first muffler shell 610 and the first separator 630, and the second muffler shell 620 and the second separator 640 are respectively configured integrally. That is, the 1st muffler shell 610 and the 1st separator 630 are comprised from one strip
  • the second muffler shell 620 and the second separator 640 are similarly configured.
  • first muffler shell 610 and the first separator 630, and the second muffler shell 620 and the second separator 640 are stacked with the surfaces of the separators facing each other. Then, these are joined by welding or the like. Further, outer plates are arranged in openings provided at both ends of the first and second muffler shells 610 and 620. Thereby, the muffler 600 is comprised.
  • the first and second separators 630 and 640 are arranged in a state where the inner space of the outer shell member is divided into two in the stacking direction.
  • the first and second separators 630 and 640 are arranged in a state of covering the entire cross section of the internal space.
  • the inner space of the outer shell member divided into two by the separator is defined as a first space and a second space, respectively.
  • the exhaust gas that has entered the muffler 600 from the entrance passes through the entrance portion 602 and enters the first and second spaces. Thereafter, the exhaust gas enters the exhaust path 601 from a starting point located at the center of the inner space of the outer shell member. Thereafter, the exhaust gas passes through the exhaust path 601 and is discharged from the outlet to the outside of the outer shell member. In addition, the exhaust gas flowing through the exhaust path 601 passes through the hole of the partition member 651 and enters the sound absorption chamber in the sound absorption section before the outlet. At this time, the exhaust gas contacts the sound absorbing material 652. Thereby, exhaust noise is suppressed.
  • the muffler 700 of the eighth embodiment has a columnar shape having a substantially elliptical bottom surface, as in the second embodiment.
  • the muffler 700 has a U-shaped exhaust path 701 (FIGS. 18 and 19). However, it differs from the second embodiment in the direction of the exhaust path 701 and the like, the configuration of the sound absorption chamber, and the like.
  • the muffler 700 of the eighth embodiment will be described focusing on the difference.
  • the muffler 700 includes an outer shell member 710, a sound absorbing material 740, a separator 720, first and second partition portions 730 and 760, a cover pipe 750, and the like.
  • the separator 720, the first and second partition portions 730 and 760, and the cover pipe 750 are plate-like members. These are made of the same material as in the second embodiment.
  • the outer shell member 710 includes plate-shaped muffler shells 711 and 712 and outer plates 713 and 714.
  • the muffler shells 711 and 712, the outer plates 713 and 714, the separator 720, the first and second partition portions 730 and 760, the cover pipe 150, and the like are formed by press-molding a plate-like member as in the second embodiment. Is formed.
  • the outer plates 713 and 714 are configured in the same manner as in the second embodiment.
  • the muffler shells 711 and 712 are rectangular plate-like members.
  • the muffler shells 711 and 712 are curved in a U shape. Further, the muffler shells 711 and 712 are arranged facing each other in the left-right direction.
  • the separator 720, the first and second partition portions 730 and 760, the sound absorbing material 740, the cover pipe 750, and the muffler shells 711 and 712 are arranged in a state of being stacked in the left-right direction.
  • these parts may be laminated
  • Separator 720 is arranged in a state where the inner space of outer shell member 710 is divided into two parts on the left and right (FIG. 19A). In other words, the separator 720 is arranged in a state of covering the entire cross section of the internal space.
  • the right side of the separator 720 in the inner space of the outer shell member 710 is referred to as the right side space
  • the left side is referred to as the left side space.
  • the separator 720 is configured in substantially the same manner as in the second embodiment, and has a groove portion 721 that forms a U-shaped path. Similarly to the second embodiment, the separator 720 is in a state where the upper and lower edge portions 722 and 723 are joined to the end portions 711a and 712a of the muffler shells 711 and 712, respectively.
  • the first and second partition parts 730 and 760 constitute a U-shaped path similar to the groove part 721 of the separator 720.
  • the first and second partition portions 730 and 760 are provided with shallow wide grooves 731 and 761.
  • a large number of small-diameter holes 732 and 762 are provided at the bottoms of the grooves 731 and 761.
  • the side where the openings of the groove portions 731 and 761 in the first and second partition portions 730 and 760 are provided is the front surface, and the opposite side is the back surface.
  • the first partition portion 730 is arranged with the back surface facing the groove portion 721 of the separator 720. Further, when the second partition part 760 is disposed, the surface thereof is in a state of facing the surface of the first partition part 730.
  • a flat sound absorbing material 740 is disposed in the flat gap (sound absorbing chamber 703) formed by the groove portions 731 and 761 of the first and second partition portions 730 and 760. The sound absorbing material 740 is disposed in a state sandwiched between the first and second partition portions 730 and 760.
  • the cover pipe 750 constitutes a U-shaped path that is substantially the same as in the second embodiment.
  • Cover pipe 750 is arranged in a state of facing groove 721 of separator 720.
  • a gap between the groove 721 of the separator 720 and the cover pipe 750 becomes a U-shaped exhaust path 701.
  • the starting point of the exhaust path 701 is the front surface of the rear outer plate 714 on the upper side of the inner space of the outer shell member 710 and is located at the center in the left-right direction.
  • the end point of the exhaust path 701 is an outlet 714a of the outer plate 714.
  • a sound absorbing material 740 is located at the center in the left-right direction of the exhaust path 701. At this time, the sound absorbing material 740 is sandwiched between the first and second partition portions 730 and 760.
  • the exhaust gas that has entered the internal space from the inlet 713a enters the left space. Thereafter, the exhaust gas enters the exhaust path 701 from a starting point located in front of the rear outer plate 714. Further, the exhaust gas passes through the exhaust path 701 and is discharged from the outlet 714 a to the outside of the outer shell member 710.
  • the exhaust gas flowing through the exhaust path 701 passes through the holes 732 and 762 of the first and second partition parts 730 and 760 and enters the sound absorption chamber 703. At this time, the exhaust gas contacts the sound absorbing material 740. Thereby, exhaust noise is suppressed.
  • an exhaust path opening 702 is formed on the side wall of the end point of the exhaust path 701 in the same manner as in the first embodiment, at the joint between the cover pipe 750 and the separator 720 (FIG. 19B).
  • the end portion of the exhaust path 701 is a part adjacent to the outlet 714a in the exhaust path 701.
  • the joints are formed at two locations on the side wall of the portion.
  • An exhaust path opening 702 may be formed at both joints. Further, an exhaust path opening 702 may be formed at one joint.
  • the inlet 713a and the outlet 714a of the muffler 700 are connected to the exhaust pipe in the same manner as in the first embodiment.
  • the exhaust path and the sound absorption chamber are formed by laminating press-molded plate-like members in a certain direction. For this reason, for example, the number of parts can be reduced and the assembly procedure can be simplified.
  • the arrangement section of the sound absorption chamber in the exhaust path can be determined flexibly. Thereby, the freedom degree of an internal structure improves.
  • the sound absorbing chamber is formed by a press-shaped plate-shaped partition member. For this reason, the area of the part which the sound absorption room and the space where exhaust gas flows down spreads. Thereby, the silencing performance is improved and the exhaust noise can be sufficiently suppressed.
  • the mufflers of the first to eighth embodiments have a configuration in which the sound absorbing material is arranged in the gap between the plate-like members stacked in a certain direction. Thereby, the arrangement
  • the separator is arranged along the facing direction of the two outer plates. And the separator is distribute
  • the facing direction of the two outer plates is, in other words, the direction from the exhaust gas inlet side to the outlet side.
  • the abnormal noise in the sound range that can be silenced by the muffler in which the separator is arranged along the direction perpendicular to the facing direction can be easily silenced by other parts constituting the exhaust path of the entire vehicle. For this reason, the silencing performance of the entire vehicle can be improved by shifting the mutable sound range to the low frequency side.
  • the separator, cover pipe, sound absorbing material, and partition part included in the mufflers of the first to fifth embodiments are configured as one plate-like member.
  • the present invention is not limited thereto, and a single separator may be configured by arranging a plurality of press-molded plate-like members in a state orthogonal to the stacking direction.
  • you may comprise an exhaust path and / or a sound absorption chamber by arrange
  • a plurality of flat sound absorbing materials may be disposed in the sound absorbing chamber.
  • the separator 720, the first and second partition portions 730 and 760, and the cover pipe 750 may be configured by a plurality of plate-like members.
  • a plurality of flat sound absorbing materials may be arranged in the sound absorbing chamber.
  • the separator constituting the exhaust path is rectangular. And the separator is distribute
  • the present invention is not limited to this, and the separator may have a shape other than a rectangle. Moreover, the separator may be arranged in a state of covering a part of the cross section of the internal space and crossing the internal space.
  • the edges forming the two sides facing the separator are joined to the muffler shell of the outer shell member.
  • the exhaust path is connected to the outlet.
  • the exhaust path may not be connected to the outlet. Even in such a case, the same effect can be obtained.
  • a sound absorbing material is arranged in the sound absorbing chamber.
  • nothing may be arranged in the sound absorbing chamber, and the internal space of the sound absorbing chamber may be used as the sound deadening space. Even in such a case, exhaust noise can be suppressed. For this reason, the silencing performance can be enhanced in the same manner.
  • a layer of a sound absorbing chamber (a sound deadening space) is provided along one of the separator and the cover pipe that form the exhaust path.
  • a layer of a sound absorption chamber (noise reduction space) is provided at the center of the exhaust path 710.
  • the present invention is not limited to this, and a plurality of sound absorbing chamber layers may be provided.
  • a sound absorbing chamber layer may be provided along both the separator and the cover pipe.
  • a plurality of layers of sound absorbing chambers may be provided in the center of the exhaust path in a separated state.
  • a sound absorbing chamber layer along both or one of the separator and the cover pipe, and a sound absorbing chamber layer positioned in the center of the exhaust path may be provided. By doing so, the silencing performance can be further enhanced.
  • the separators 20, 120, 220, 320, 420, 540, 720 and the cover pipes 50, 150, 250, 350, 450, 750 in the first to sixth and eighth embodiments are examples of the plate member for the exhaust path. It corresponds to.

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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)
PCT/JP2016/050845 2015-02-20 2016-01-13 マフラ WO2016132777A1 (ja)

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DE112016000827.9T DE112016000827B4 (de) 2015-02-20 2016-01-13 Schalldämpfer
CN201680011031.4A CN107250495B (zh) 2015-02-20 2016-01-13 消音器

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JP2015031754A JP6483469B2 (ja) 2015-02-20 2015-02-20 マフラ
JP2015-031754 2015-02-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11206961B2 (en) * 2017-03-08 2021-12-28 Kyocera Industrial Tools Corporation Sound absorption structure for air flow path in electric air flow generation device and electric vacuum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU202977U1 (ru) * 2020-07-14 2021-03-17 Публичное акционерное общество "КАМАЗ" Глушитель шума выпуска для двигателя внутреннего сгорания

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836167B2 (ja) * 1976-08-31 1983-08-08 カルソニックカンセイ株式会社 消音器
JPS63138115A (ja) * 1986-11-25 1988-06-10 エ−ピ−．インダストリ−ズ．インコ−ポレ−テツド 消音器
JPH08246842A (ja) * 1995-02-27 1996-09-24 Ap Parts Mfg Co 排気マフラーと型押マフラー
US6068082A (en) * 1997-11-21 2000-05-30 D'amico, Jr.; John Muffler packing method and apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02298621A (ja) 1989-05-13 1990-12-11 Sankei Kogyo Kk スタンプドマフラの製造方法
JPH03242416A (ja) 1990-02-19 1991-10-29 Nissan Motor Co Ltd 排気消音器
ATE240454T1 (de) 1997-02-04 2003-05-15 Ap Parts Mfg Company Schalldämpfer mit durch stanzen hergestellten innenplatten, die die röhre begrenzen und kammern trennen
WO1999039087A1 (en) 1998-01-30 1999-08-05 Arvin Industries, Inc. Stamped-formed muffler apparatus and assembly process
US7273129B2 (en) * 2003-09-05 2007-09-25 Faurecia Exhaust Systems, Inc. Muffler with internal heat shield
JP6017798B2 (ja) * 2012-02-23 2016-11-02 フタバ産業株式会社 排気流路用弁装置
JP6162541B2 (ja) 2013-08-22 2017-07-12 株式会社Ｓｕｂａｒｕ マフラ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836167B2 (ja) * 1976-08-31 1983-08-08 カルソニックカンセイ株式会社 消音器
JPS63138115A (ja) * 1986-11-25 1988-06-10 エ−ピ−．インダストリ−ズ．インコ−ポレ−テツド 消音器
JPH08246842A (ja) * 1995-02-27 1996-09-24 Ap Parts Mfg Co 排気マフラーと型押マフラー
US6068082A (en) * 1997-11-21 2000-05-30 D'amico, Jr.; John Muffler packing method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11206961B2 (en) * 2017-03-08 2021-12-28 Kyocera Industrial Tools Corporation Sound absorption structure for air flow path in electric air flow generation device and electric vacuum

Also Published As

Publication number Publication date
JP2016153616A (ja) 2016-08-25
CN107250495B (zh) 2019-07-23
JP6483469B2 (ja) 2019-03-13
DE112016000827B4 (de) 2023-02-23
CN107250495A (zh) 2017-10-13
DE112016000827T5 (de) 2017-10-26

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