JP4984084B2 - Silencer - Google Patents

Silencer Download PDF

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JP4984084B2
JP4984084B2 JP2008116256A JP2008116256A JP4984084B2 JP 4984084 B2 JP4984084 B2 JP 4984084B2 JP 2008116256 A JP2008116256 A JP 2008116256A JP 2008116256 A JP2008116256 A JP 2008116256A JP 4984084 B2 JP4984084 B2 JP 4984084B2
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sound absorbing
absorbing material
silencer
cylindrical body
convex portion
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JP2008116256A
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JP2009243458A (en
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秀明 谷口
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Sango Co Ltd
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Sango Co Ltd
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本発明は燃料電池や内燃機関を搭載した車両などの排気系に設けられる消音器、より詳しくは消音器内に吸音材を設けた消音器に関する。  The present invention relates to a silencer provided in an exhaust system of a vehicle or the like equipped with a fuel cell or an internal combustion engine, and more particularly to a silencer provided with a sound absorbing material in the silencer.

従来、燃料電池や内燃機関を搭載した車両などには、高周波の排気騒音を低減する目的で容器内に吸音材を設けた吸音型消音器が設けられることがあった。このような消音器として、ガラスなどの繊維をフェルト状に集積したグラスウールを吸音材として用いた消音器が知られている。また、特開２００７−２１１７６９に記載されているように、樹脂繊維を堆積し加熱圧縮してシート状にした吸音材を複数重合した吸音材を用いることで、吸音材が含水して消音性能が低下することを抑制することも知られている。
特開２００７−２１１７６９ Conventionally, a vehicle equipped with a fuel cell or an internal combustion engine is sometimes provided with a sound absorbing silencer provided with a sound absorbing material in a container for the purpose of reducing high-frequency exhaust noise. As such a silencer, there is known a silencer using glass wool in which fibers such as glass are accumulated in a felt shape as a sound absorbing material. Further, as described in JP-A-2007-2111769, by using a sound absorbing material obtained by polymerizing a plurality of sound absorbing materials deposited and heat-compressed into resin sheets, the sound absorbing material contains water and has a sound deadening performance. It is also known to suppress the decrease.
JP2007-211769

上記従来技術に記載された消音器においては、消音器内に設けられた排気流路と吸音材との境界面にフィン状の突出部を設けて、消音器のハウジングを成す筒状体と吸音材との周方向の位置ズレを防止し吸音材を保持することを企図していた。しかしながら、排気流路と吸音材との境界面に突出部が設けられているため、排気ガスが吸音材と接触する面積が減少し、吸音材による消音効果が十分に発揮されなかった。また、吸音材に蓄えられた排気ガス中の水分の排水性にも悪影響を及ぼしていた。  In the silencer described in the above prior art, a fin-like protrusion is provided on the boundary surface between the exhaust flow path and the sound absorbing material provided in the silencer, and the cylindrical body constituting the silencer housing and the sound absorbing It was intended to prevent the positional deviation in the circumferential direction from the material and hold the sound absorbing material. However, since the projecting portion is provided at the boundary surface between the exhaust flow path and the sound absorbing material, the area where the exhaust gas contacts the sound absorbing material is reduced, and the sound deadening effect by the sound absorbing material is not sufficiently exhibited. Moreover, the drainage of the water | moisture content in the exhaust gas stored in the sound-absorbing material was also adversely affected.

本発明は上記問題点に鑑みてなされたものであり、吸音材の周方向の位置ズレを防止するとともに、消音効果と排水性を向上することが可能な消音器を提供することを主目的とするものである。  The present invention has been made in view of the above problems, and has as its main object to provide a silencer capable of preventing the positional displacement of the sound absorbing material in the circumferential direction and improving the silencing effect and drainage. To do.

前記の課題を解決するために、請求項１記載の発明は、筒状体の内部に吸音材と排気ガスが流通する排気流路とを設けた消音器において、前記筒状体の上部に扇状に形成された吸音材を収容し、前記筒状体の中央部と下部に排気ガスが流通する排気流路を形成するとともに、前記筒状体の内周が突出するように凸状部を長さ方向の全長に渡って設け、さらに前記凸状部と係合する係合部を吸音材に形成したことを特徴とする消音器である。In order to solve the above-mentioned problem, the invention according to claim 1 is a silencer provided with a sound absorbing material and an exhaust passage through which exhaust gas circulates in a cylindrical body. The sound absorbing material formed in the cylindrical body is accommodated, an exhaust passage through which exhaust gas flows is formed in the central part and the lower part of the cylindrical body, and the convex part is extended so that the inner periphery of the cylindrical body protrudes. is provided over the entire length direction, a silencer, characterized in that the engagement portion for further engagement with the convex portion is formed to have sound absorbing material.

請求項２記載の発明は、請求項１記載の発明において、前記凸状部を前記筒状体の内方に突出するように前記筒状体と一体的に形成したことを特徴とする消音器である。The invention according to claim 2 is the silencer according to claim 1, wherein the convex portion is formed integrally with the cylindrical body so as to protrude inward of the cylindrical body. It is.

請求項３記載の発明は、請求項１または２記載の発明において、前記凸状部および前記係合部をそれぞれ楔状に形成したことを特徴とする消音器である。  A third aspect of the present invention is the silencer according to the first or second aspect, wherein the convex portion and the engaging portion are each formed in a wedge shape.

本発明によれば、吸音材の周方向の位置ズレを防止するとともに、吸音材の消音効果と排水性を向上することができるといった効果を奏する。  ADVANTAGE OF THE INVENTION According to this invention, while producing the position shift of the circumferential direction of a sound-absorbing material, there exists an effect that the silencing effect and drainage of a sound-absorbing material can be improved.

本発明を実施するための最良の形態を図１乃至図２に示す実施例に基づいて説明する。  The best mode for carrying out the present invention will be described based on the embodiment shown in FIGS.

図１は、本発明の実施例１に係る消音器を示す（ａ）縦断面図、（ｂ）横断面図である。なお、消音器１は図上方が使用状態における上方になるように示されている。円形断面を備えたアルミニウム製の筒状体２の両開口端に、アルミニウム製の皿状のアウタープレート３，４が接合されて消音器１のハウジングが形成されている。アウタープレート３，４には、上流側および下流側排気管（図示せず）と接続するための接続パイプ９，１０がそれぞれ接合されている。筒状体２には、上部の周方向の３箇所に内周が内方に向かって突出するように凸状部５が、長さ方向の略全長に渡って一体的に形成されている。筒状体２の上部には、外周が筒状体２の内周に略一致する扇状に形成された吸音材６が収容され、中央部および下部に排気ガスが流通する排気流路８が形成されている。吸音材６は、樹脂繊維を加熱圧縮して形成された吸音シートを複数重合して形成するとともに、吸音シートの面方向が略鉛直を指向するように配設されている。また、吸音材６には筒状部材２に形成された凸状部５に係合する切欠状の係合部７が３箇所に形成されている。  FIG. 1A is a longitudinal sectional view and FIG. 1B is a transverse sectional view showing a silencer according to a first embodiment of the present invention. In addition, the silencer 1 is shown so that the upper side in the figure is the upper side in the use state. An aluminum dish-shaped outer plate 3, 4 is joined to both opening ends of an aluminum cylindrical body 2 having a circular cross section to form a housing of the silencer 1. Connection pipes 9 and 10 for connecting to the upstream and downstream exhaust pipes (not shown) are joined to the outer plates 3 and 4, respectively. The cylindrical body 2 is integrally formed with a convex portion 5 at almost three locations in the upper circumferential direction so that the inner circumference protrudes inwardly over substantially the entire length in the length direction. In the upper part of the cylindrical body 2, a sound absorbing material 6 formed in a fan shape whose outer periphery substantially coincides with the inner periphery of the cylindrical body 2 is accommodated, and an exhaust passage 8 through which exhaust gas flows is formed in the center and the lower part. Has been. The sound absorbing material 6 is formed by superposing a plurality of sound absorbing sheets formed by heating and compressing resin fibers, and is disposed so that the surface direction of the sound absorbing sheet is substantially vertical. In addition, the sound absorbing material 6 is formed with three notched engaging portions 7 that engage with the convex portions 5 formed on the cylindrical member 2.

以上のように構成されていることにより、凸状部と係合部が係合して吸音材の周方向の位置ズレを防止することができる。また、排気ガス中に含まれる水分により吸音材が含水した際に、吸音材の端部から排気流路に容易に排水することができる。さらに、排気ガスと吸音材の接触面積が増加するため吸音材の消音効果を向上することができる。  By being configured as described above, the convex portion and the engaging portion can be engaged with each other to prevent the displacement of the sound absorbing material in the circumferential direction. Further, when the sound absorbing material contains water due to moisture contained in the exhaust gas, it can be easily drained from the end of the sound absorbing material to the exhaust passage. Further, since the contact area between the exhaust gas and the sound absorbing material is increased, the sound absorbing effect of the sound absorbing material can be improved.

図２（ａ）〜（ｃ）は実施例１の消音器の変形例を示す横断面図である。なお、実施例１と同一の構成については同一の符号を付与しその説明を省略する。（ａ）筒状体２２の周方向の１箇所のみに内周が内方に向かって突出する凸状部２５が一体的に形成されている。一方、吸音材２６には上記実施例と同様に凸状部２５に係合する切欠状の係合部２７が３箇所に形成されている。このように構成することにより、上記実施例１の作用効果に加え、管状体と吸音材の周方向の位置関係を任意に調整することが可能である。  2A to 2C are cross-sectional views showing modifications of the silencer of the first embodiment. In addition, about the structure same as Example 1, the same code | symbol is provided and the description is abbreviate | omitted. (A) The convex part 25 in which an inner periphery protrudes inwardly in one place of the circumferential direction of the cylindrical body 22 is integrally formed. On the other hand, the sound absorbing material 26 is formed with three notched engaging portions 27 that engage with the convex portion 25 as in the above embodiment. By comprising in this way, in addition to the effect of the said Example 1, it is possible to adjust arbitrarily the positional relationship of the circumferential direction of a tubular body and a sound-absorbing material.

（ｂ）筒状体４２の周方向の１箇所に内周が内方に向かって突出する楔状の凸状部４５が一体的に形成されている。吸音材４６には凸状部４５に係合する楔状の係合部４７が１箇所に形成されている。このように構成することにより、上記実施例１の作用効果に加え、吸音材の周方向と径方向の位置ズレ防止することが可能である。(B) A wedge-shaped convex portion 45 whose inner periphery protrudes inward is integrally formed at one place in the circumferential direction of the cylindrical body 42. The sound absorbing material 46 has a wedge-shaped engaging portion 47 that engages with the convex portion 45 at one location. By comprising in this way, in addition to the effect of the said Example 1, it is possible to prevent the position shift of the sound absorption material of the circumferential direction and radial direction.

（ｃ）筒状体６２の周方向の１箇所に内周が外方に向かって突出する凸状部６５が一体的に形成されている。吸音材６６には凸状部６５に係合する外方へ突出した係合部６７が１箇所に形成されている。このように構成されていることにより、上記実施例１と同様の作用効を発揮することができる。(C) A convex portion 65 whose inner periphery protrudes outward is integrally formed at one location in the circumferential direction of the cylindrical body 62. The sound absorbing material 66 has an engaging portion 67 that protrudes outward and engages with the convex portion 65 at one location. By being configured in this way, the same effects as those of the first embodiment can be exhibited.

なお、上記実施例においては、筒状部材をアルミニウム製としたが、金属や樹脂など任意の材料を選択することができる。なお、内方に向かって突出する凸状部を形成する際には、アルミニウムや樹脂による押し出し法により作製することが好ましい。また、吸音材は、樹脂繊維を加熱圧縮して形成された吸音シートのみならず、グラスウールなどの繊維体や樹脂などの発泡体などでもよい。さらに、吸音材は溶着やバインダーなどにより一体化的に成形することが好ましい。また、排気流路は任意の位置、形状に設けることができるが、排水性を考慮して下方に設けるのが好ましい。  In addition, in the said Example, although the cylindrical member was made from aluminum, arbitrary materials, such as a metal and resin, can be selected. In addition, when forming the convex part which protrudes toward inward, it is preferable to produce by the extrusion method by aluminum or resin. Further, the sound absorbing material may be not only a sound absorbing sheet formed by heating and compressing resin fibers, but also a fibrous body such as glass wool or a foamed body such as resin. Furthermore, it is preferable that the sound absorbing material is integrally formed by welding or a binder. Moreover, although an exhaust flow path can be provided in arbitrary positions and shapes, it is preferable to provide below in consideration of drainage.

以上、本発明の実施例を説明してきたが、本発明は上述の実施例に限られるものではなく、本発明の趣旨を逸脱しない範囲の設計変更があっても本発明に包含される。  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and design changes within a range that does not depart from the spirit of the present invention are included in the present invention.

本発明に係る実施例１の消音器を示す（ａ）縦断面図、（ｂ）横断面図。The (a) longitudinal cross-sectional view which shows the silencer of Example 1 which concerns on this invention, (b) A cross-sectional view. （ａ）〜（ｃ）実施例１の消音器の変形例を示す横断面図。(A)-(c) The cross-sectional view which shows the modification of the silencer of Example 1. FIG.

符号の説明Explanation of symbols

１ 消音器
２，２２，４２，６２ 筒状体
５，２５，４５，６５ 凸状部
６，２６，４６，６６ 吸音材
７，２７，４７，６７ 係合部
８ 排気流路DESCRIPTION OF SYMBOLS 1 Silencer 2,22,42,62 Cylindrical body 5,25,45,65 Convex part 6,26,46,66 Sound-absorbing material 7,27,47,67 Engagement part 8 Exhaust flow path

Claims (3)

筒状体の内部に吸音材と排気ガスが流通する排気流路とを設けた消音器において、前記筒状体の上部に扇状に形成された吸音材を収容し、前記筒状体の中央部と下部に排気ガスが流通する排気流路を形成するとともに、前記筒状体の内周が突出するように凸状部を長さ方向の全長に渡って設け、さらに前記凸状部と係合する係合部を吸音材に形成したことを特徴とする消音器。A silencer provided with a sound absorbing material and an exhaust passage through which exhaust gas circulates in a cylindrical body , wherein the sound absorbing material formed in a fan shape is accommodated in an upper portion of the cylindrical body, and a central portion of the cylindrical body An exhaust passage through which exhaust gas flows is formed at the bottom, and a convex portion is provided over the entire length in the length direction so that the inner periphery of the cylindrical body protrudes, and is further engaged with the convex portion A muffler characterized in that an engaging portion is formed on a sound absorbing material. 前記凸状部を前記筒状体の内方に突出するように前記筒状体と一体的に形成したことを特徴とする請求項１記載の消音器。Muffler of claim 1, wherein the tubular body and it has integrally formed so as to protrude the convex portion inwardly of the tubular body. 前記凸状部および前記係合部をそれぞれ楔状に形成したことを特徴とする請求項１または２記載の消音器。The silencer according to claim 1 or 2, wherein each of the convex portion and the engaging portion is formed in a wedge shape.
JP2008116256A 2008-03-31 2008-03-31 Silencer Expired - Fee Related JP4984084B2 (en)

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JP4984084B2 true JP4984084B2 (en) 2012-07-25

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131515U (en) * 1983-02-22 1984-09-04 本田技研工業株式会社 Silencer
JPS59154817U (en) * 1983-04-01 1984-10-17 本田技研工業株式会社 Scattering prevention device for sound absorbing material in silencer
JPH0610116Y2 (en) * 1986-08-29 1994-03-16 河西工業株式会社 Intake duct
FR2865766B1 (en) * 2004-01-30 2008-01-04 Hutchinson SILENCER FOR EXHAUST LINE OF A VEHICLE ENGINE AND METHOD OF MOUNTING
JP4464854B2 (en) * 2005-03-24 2010-05-19 トヨタ自動車株式会社 Silencer for fuel cell

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