JP2013241852A - Engine exhaust muffler - Google Patents

Engine exhaust muffler Download PDF

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JP2013241852A
JP2013241852A JP2012114279A JP2012114279A JP2013241852A JP 2013241852 A JP2013241852 A JP 2013241852A JP 2012114279 A JP2012114279 A JP 2012114279A JP 2012114279 A JP2012114279 A JP 2012114279A JP 2013241852 A JP2013241852 A JP 2013241852A
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pipe
shell
expansion chamber
silencing
engine
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JP5695599B2 (en
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Katsunori Ogoshi
克紀 大越
Naoki Okuhara
直樹 奥原
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Yutaka Giken Co Ltd
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Yutaka Giken Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an engine exhaust muffler having a compact cylindrical shell as well as U-shaped first and second silencing pipes.SOLUTION: An engine exhaust muffler comprises: partition walls 9, 10 for partitioning the inside of a shell 2 into a plurality of expansion chambers 6 to 8; a first silencing pipe 14 for guiding the exhaust gas of an engine E to a predetermined expansion chamber 6 through the partition walls 9, 10; and a second silencing pipe 15 for discharging the exhaust gas flow out of the first silencing pipe 14 to another predetermined expansion chamber 8 to the outside. The first silencing pipe 14 comprises a U-shaped pipe with a U-shaped bent part 14c facing the second shell end plate 5. The second silencing pipe 15 comprises a U-shaped pipe with a U-shaped bent part 15c facing the first shell end plate 4. The engine exhaust muffler has the first and second silencing pipes 14, 15 disposed so that they cross on a projection plane orthogonal to the shell 2 axial direction.

Description

本発明は，シェル胴部，並びにこのシェル胴部の両端に接続される第１及び第２シェル端板よりなるシェルと，このシェル内を複数の膨張室に仕切る隔壁と，この隔壁を貫通して，エンジンの排ガスを所定の膨張室に誘導する第１消音パイプと，この第１消音パイプから流出した排ガスを，別の所定の膨張室から外部に排出する第２消音パイプとを備え，前記第１消音パイプは，Ｕ字状の屈曲部を前記第２シェル端板側へ向けたＵ字状パイプで構成され，また前記第２消音パイプは，Ｕ字状の屈曲部を前記第１シェル端板側へ向けたＵ字状パイプで構成される，エンジン用排気マフラの改良に関する。   The present invention provides a shell comprising a shell body, first and second shell end plates connected to both ends of the shell body, a partition partitioning the inside of the shell into a plurality of expansion chambers, and penetrating the partition. A first silencing pipe for guiding the exhaust gas of the engine to a predetermined expansion chamber, and a second silencing pipe for discharging the exhaust gas flowing out from the first silencing pipe to the outside from another predetermined expansion chamber, The first silencing pipe is formed of a U-shaped pipe with a U-shaped bent portion directed toward the second shell end plate, and the second silencing pipe has a U-shaped bent portion formed on the first shell. The present invention relates to an improvement of an engine exhaust muffler composed of a U-shaped pipe directed toward an end plate.

かゝるエンジン用排気マフラは，特許文献１に開示されるように，既に知られている。   Such an exhaust muffler for an engine is already known as disclosed in Patent Document 1.

特開平１１−２００８３５号公報Japanese Patent Laid-Open No. 11-200835

かゝるエンジン用排気マフラでは，エンジンの排ガスを所定の膨張室に誘導すべく，Ｕ字状の屈曲部を第２シェル端板側へ向けた第１消音パイプが中周波数域で消音効果を発揮し，また第１消音パイプから流出した排ガスを，別の所定の膨張室から外部に排出すべく，Ｕ字状の屈曲部を第１シェル端板側へ向けたＵ字状の第２消音パイプが低周波数域で消音効果を発揮するので，比較的広い周波数域で排気騒音を低減することができる。   In such an engine exhaust muffler, the first muffler pipe with the U-shaped bend toward the second shell end plate has a silencing effect in the middle frequency range in order to guide the engine exhaust gas to a predetermined expansion chamber. In order to exhaust the exhaust gas flowing out from the first silencing pipe to the outside from another predetermined expansion chamber, the U-shaped second silencing with the U-shaped bent portion directed toward the first shell end plate Since the pipe exhibits a silencing effect in the low frequency range, exhaust noise can be reduced in a relatively wide frequency range.

しかしながら，従来のものでは，第１及び第２消音パイプを，互いに挟み合うようにして一平面上に配置しているので，それらを収容する筒状のシェルが前記一平面方向で大型化することになる。   However, in the prior art, the first and second silencer pipes are arranged on one plane so as to sandwich each other, so that the cylindrical shell that accommodates them is enlarged in the one plane direction. become.

本発明は，かゝる事情に鑑みてなされたもので，Ｕ字状の第１及び第２消音パイプを備えながら，筒状のシェルの小型化を可能にする前記エンジン用排気マフラを提供することを目的とする。   The present invention has been made in view of such circumstances, and provides an exhaust muffler for an engine capable of reducing the size of a cylindrical shell while including U-shaped first and second silencing pipes. For the purpose.

上記目的を達成するために，本発明は，シェル胴部，並びにこのシェル胴部の両端に接続される第１及び第２シェル端板よりなるシェルと，このシェル内を複数の膨張室に仕切る隔壁と，この隔壁を貫通して，エンジンの排ガスを所定の膨張室に誘導する第１消音パイプと，この第１消音パイプから流出した排ガスを，別の所定の膨張室から外部に排出する第２消音パイプとを備え，前記第１消音パイプは，Ｕ字状の屈曲部を前記第２シェル端板側へ向けたＵ字状パイプで構成され，また前記第２消音パイプは，Ｕ字状の屈曲部を前記第１シェル端板側へ向けたＵ字状パイプで構成される，エンジン用排気マフラにおいて，前記第１及び第２消音パイプを，これらが前記シェルの軸方向と直交する投影面上で交差するように配置したことを第１の特徴とする。   In order to achieve the above object, the present invention partitions a shell comprising a shell body and first and second shell end plates connected to both ends of the shell body into a plurality of expansion chambers. A partition wall, a first silencer pipe that passes through the partition wall to guide engine exhaust gas to a predetermined expansion chamber, and exhaust gas that has flowed out of the first silencer pipe is discharged from another predetermined expansion chamber to the outside. 2 silencer pipes, wherein the first silencer pipe is a U-shaped pipe with a U-shaped bent portion directed toward the second shell end plate, and the second silencer pipe is U-shaped. In an engine exhaust muffler composed of a U-shaped pipe with its bent portion directed toward the first shell end plate, the first and second silencer pipes are projected such that they are orthogonal to the axial direction of the shell. That they are placed so that they intersect on the surface. It is a feature of the.

また本発明は，第１の特徴に加えて，前記第１シェル端板に隣接する第１膨張室に，エンジンの排気管が接続されるインレットパイプを配置すると共に，このインレットパイプに，前記第１膨張室に開口する多数の孔を設け，前記第１消音パイプの上流端を前記第１膨張室に開口させたことを第２の特徴とする。   According to the present invention, in addition to the first feature, an inlet pipe to which an exhaust pipe of an engine is connected is disposed in the first expansion chamber adjacent to the first shell end plate. A second feature is that a plurality of holes opened in one expansion chamber are provided, and an upstream end of the first silencer pipe is opened in the first expansion chamber.

さらに本発明は，第２の特徴に加えて，前記シェルに，その内部を前記第１シェル端板側から第１，第２及び第３膨張室に仕切る第１及び第２隔壁を設け，その第２隔壁に，前記第２及び第３膨張室間を連通する多数の孔を設け，前記第１消音パイプの下流端を前記第２膨張室に開口させ，下流端を前記第２シェル端板外に開放する前記第２消音パイプの上流端を前記第２膨張室に開口させたことを第３の特徴とする。   In addition to the second feature of the present invention, the shell is provided with first and second partitions that partition the inside of the shell into first, second, and third expansion chambers from the first shell end plate side. The second partition wall has a plurality of holes communicating between the second and third expansion chambers, the downstream end of the first silencer pipe is opened to the second expansion chamber, and the downstream end is the second shell end plate. A third feature is that an upstream end of the second silencing pipe opened to the outside is opened in the second expansion chamber.

さらにまた本発明は，第１〜第３の特徴の何れかに加えて，前記第１及び第２端板の少なくとも一方には，それに対向する前記第１消音パイプ又は第２消音パイプのＵ字状の屈曲部を収容する外方膨出部を形成したことを第４の特徴とする。   Furthermore, in addition to any one of the first to third features, the present invention provides at least one of the first and second end plates having a U-shape of the first silencer pipe or the second silencer pipe opposed thereto. A fourth feature is that an outwardly bulging portion that accommodates the bent portion is formed.

本発明の第１の特徴によれば，中周波数の騒音に対して消音効果を発揮するＵ字状の第１消音パイプと，低周波数の騒音に対して消音効果を発揮するＵ字状の第２消音パイプとを，これらがシェルの軸方向と直交する投影面上で交差するように配置したことで，有効長さの長い第１及び第２消音パイプをシェル内にコンパクトに収容することができ，これによって排気マフラのシェルの小型化を図ることができる。   According to the first feature of the present invention, a U-shaped first silencer pipe that exhibits a silencing effect on medium frequency noise and a U-shaped first silencer pipe that exhibits a silencing effect on low frequency noise. By arranging the two silencer pipes so that they intersect on the projection plane orthogonal to the axial direction of the shell, the first and second silencer pipes having a long effective length can be compactly accommodated in the shell. Thus, the exhaust muffler shell can be downsized.

本発明の第２の特徴によれば，第１シェル端板に隣接する第１膨張室に，エンジンの排気管が接続されるインレットパイプを配置すると共に，このインレットパイプに，第１膨張室に開口する多数の孔を設け，第１消音パイプの上流端を第１膨張室に開口させたことで，エンジンの排ガスは，排気管を通過した後，インレットパイプに流入し，このインレットパイプの多数の孔から第１膨張室に広く分散されることで，高周波の騒音を吸収し，次いで第１消音パイプによって中周波数の騒音を低減することができる。   According to the second feature of the present invention, an inlet pipe to which an engine exhaust pipe is connected is disposed in the first expansion chamber adjacent to the first shell end plate, and the inlet pipe is connected to the first expansion chamber. By providing a number of holes to be opened and opening the upstream end of the first muffler pipe into the first expansion chamber, the exhaust gas of the engine flows into the inlet pipe after passing through the exhaust pipe. The high-frequency noise can be absorbed by the first expansion chamber through the first hole, and then the medium-frequency noise can be reduced by the first silencer pipe.

本発明の第３の特徴によれば，シェルに，その内部を第１シェル端板側から第１，第２及び第３膨張室に仕切る第１及び第２隔壁を設け，その第２隔壁に，第２及び第３膨張室間を連通する多数の孔を設け，第１消音パイプの下流端を第２膨張室に開口させ，下流端を前記第２シェル端板外に開放する前記第２消音パイプの上流端を前記第２膨張室に開口させたことで，高周波数から低周波数までの広い周波数域において，消音効果を発揮することができる。   According to the third feature of the present invention, the shell is provided with first and second partition walls that divide the interior into first, second, and third expansion chambers from the first shell end plate side, and the second partition wall , A plurality of holes communicating between the second and third expansion chambers, the second end of the first silencer pipe being opened to the second expansion chamber, and the second end being opened outside the second shell end plate. By opening the upstream end of the muffler pipe into the second expansion chamber, a muffling effect can be exhibited in a wide frequency range from a high frequency to a low frequency.

本発明の第４の特徴によれば，第１及び第２端板の少なくとも一方には，それに対向する第１消音パイプ又は第２消音パイプのＵ字状の屈曲部を収容する外方膨出部を形成したことで，端板の剛性の強化と，シェルのコンパクト化を図りながら消音パイプの有効長さを充分に得ることができて，その消音機能を高めることができる。   According to the fourth aspect of the present invention, at least one of the first and second end plates is an outward bulge that accommodates a U-shaped bent portion of the first silencer pipe or the second silencer pipe facing it. By forming the portion, the effective length of the silencer pipe can be sufficiently obtained while enhancing the rigidity of the end plate and making the shell compact, and the silencer function can be enhanced.

本発明の実施形態に係る排気マフラを備えた自動車用エンジンの排気系の平面図。The top view of the exhaust system of the engine for motor vehicles provided with the exhaust muffler which concerns on embodiment of this invention. 上記排気マフラの縦断平面図。FIG. 3 is a vertical plan view of the exhaust muffler. 図２の３−３線断面図。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. 図２の４−４線断面図。FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

本発明の実施形態を添付図面に基づいて以下に説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

先ず，図１において，エンジンＥのシリンダヘッドに接続される排気管１の下流端に本発明の排気マフラＭの一端部が接続される。   First, in FIG. 1, one end of the exhaust muffler M of the present invention is connected to the downstream end of the exhaust pipe 1 connected to the cylinder head of the engine E.

図２〜図４において，上記排気マフラＭのシェル２は，筒状のシェル胴部３と，このシェル胴部３の両端にかしめ又は溶接により結合される第１及び第２シェル端板４，５とで構成される。また各端板４，５は，その中心部を外方へ向けた球状の外方膨出部４ａ，５ａを有し，この外方膨出部４ａ，５ａにより各端板４，５の剛性が強化される。   2 to 4, the shell 2 of the exhaust muffler M includes a cylindrical shell body 3 and first and second shell end plates 4 connected to both ends of the shell body 3 by caulking or welding. And 5. Each of the end plates 4 and 5 has spherical outward bulging portions 4a and 5a with the central portions facing outward, and the rigidity of the end plates 4 and 5 is determined by the outward bulging portions 4a and 5a. Will be strengthened.

上記シェル胴部３の内周壁には，シェル２の内部を第１シェル端板４側から第１，第２及び第３膨張室６〜８に仕切る第１及び第２隔壁９，１０が溶接され，第１隔壁９は無孔であるが，第２隔壁１０には，第２及び第３膨張室７，８間を連通する多数の孔１２，１２…が設けられる。   First and second partition walls 9 and 10 that partition the inside of the shell 2 into first, second, and third expansion chambers 6 to 8 from the side of the first shell end plate 4 are welded to the inner peripheral wall of the shell body 3. Although the first partition wall 9 is non-porous, the second partition wall 10 is provided with a large number of holes 12, 12,... Communicating between the second and third expansion chambers 7, 8.

またシェル２内には，インレットパイプ１３と，それぞれＵ字状パイプよりなる第１及び第２消音パイプ１４，１５とが配設される。インレットパイプ１３は，第１シェル端板４を貫通して第１膨張室６に配置される。このインレットパイプ１３は第１シェル端板４と第１隔壁９とに溶接して固着されると共に，その下流端は第１隔壁９により閉鎖され，その上流端に前記排気管１の下流端が接続される。このインレットパイプ１３には，第１膨張室６に開口する多数の孔１６，１６…が穿設されている。   In the shell 2, an inlet pipe 13 and first and second silencing pipes 14 and 15 each made of a U-shaped pipe are disposed. The inlet pipe 13 passes through the first shell end plate 4 and is disposed in the first expansion chamber 6. The inlet pipe 13 is welded and fixed to the first shell end plate 4 and the first partition wall 9, and its downstream end is closed by the first partition wall 9, and the downstream end of the exhaust pipe 1 is connected to the upstream end thereof. Connected. The inlet pipe 13 has a large number of holes 16, 16... That open to the first expansion chamber 6.

第１消音パイプ１４は，上流端を第１膨張室６に開口させる上流側直線部１４ａと，下流端を第２膨張室７に開口させる下流側直線部１４ｂと，これら上流側直線部１４ａ及び下流側直線部１４ｂ間を第３膨張室８において接続するＵ字状の屈曲部１４ｃとで構成され，上流側直線部１４ａは，第１及び第２隔壁９，１０を貫通すると共に，それらに溶接して固着され，下流側直線部１４ｂは，第２隔壁１０を貫通すると共に，それに溶接して固着される。   The first silencing pipe 14 includes an upstream straight portion 14a having an upstream end opened to the first expansion chamber 6, a downstream straight portion 14b having a downstream end opened to the second expansion chamber 7, and the upstream straight portion 14a and A U-shaped bent portion 14c connecting the downstream linear portions 14b in the third expansion chamber 8, and the upstream linear portion 14a penetrates the first and second partition walls 9 and 10, and The downstream straight portion 14b penetrates through the second partition wall 10 and is welded and fixed thereto.

第２消音パイプは，上流端を第３膨張室８に開口させる上流側直線部１５ａと，下流端を第２シェル端板５外に開放する下流側直線部１５ｂと，これら上流側直線部１５ａ及び下流側直線部１５ｂ間を第１膨張室６において接続するＵ字状の屈曲部１５ｃとで構成され，上流側直線部１４ａは，第２隔壁９，１０を貫通すると共に，それに溶接して固着され，下流側直線部１５ｂは，第１及び第２隔壁９，１０を貫通すると共に，それらに溶接して固着され，Ｕ字状の屈曲部１５ｃは，第１シェル端板４の外方膨出部４ａ内に臨むように配置される。第２消音パイプ１５の下流端には，第２シェル端板５の外方へ突出するテールパイプ１７が接続される。   The second silencer pipe includes an upstream straight portion 15a having an upstream end opened to the third expansion chamber 8, a downstream straight portion 15b having a downstream end opened to the outside of the second shell end plate 5, and the upstream straight portions 15a. And a U-shaped bent portion 15c that connects the downstream linear portion 15b in the first expansion chamber 6, and the upstream linear portion 14a penetrates the second partition walls 9 and 10 and is welded thereto. The downstream straight portion 15b penetrates the first and second partition walls 9 and 10 and is welded and fixed to them. The U-shaped bent portion 15c is formed on the outer side of the first shell end plate 4. It arrange | positions so that it may face in the bulging part 4a. A tail pipe 17 projecting outward from the second shell end plate 5 is connected to the downstream end of the second silencer pipe 15.

而して，上記第１及び第２消音パイプ１４，１５は，シェル２の軸方向と直交する投影面上で交差するように配置される。そして，これら第１及び第２消音パイプ１４，１５を効率良く収容すべく，シェル２は，断面楕円形に形成される。   Thus, the first and second silencer pipes 14 and 15 are arranged so as to intersect on a projection plane orthogonal to the axial direction of the shell 2. And the shell 2 is formed in the cross-sectional ellipse shape in order to accommodate these 1st and 2nd muffler pipes 14 and 15 efficiently.

次に，この実施形態の作用について説明する。   Next, the operation of this embodiment will be described.

エンジンＥの運転中，それから排気管１へ排出された排ガスは，排気管１を通過した後，インレットパイプ１３に流入し，そのインレットパイプ１３の多数の孔１６，１６…から第１膨張室６に広く分散されることで，高周波の騒音を吸収することができる。   During operation of the engine E, the exhaust gas discharged to the exhaust pipe 1 passes through the exhaust pipe 1 and then flows into the inlet pipe 13, and the first expansion chamber 6 passes through the numerous holes 16, 16. It is possible to absorb high frequency noise by being widely dispersed.

第１膨張室６に分散した排ガスは，第１消音パイプ１４に流入して，第２膨張室７へと流出する。この第１消音パイプ１４は，第１及び第２隔壁９，１０を貫通し，第３膨張室８でＵターンして再び第２隔壁１０を貫通するようにＵ字状に形成され，第１及び第２膨張室６，７間を連通するので，その流路長は，シェル２の軸方向長さより充分に長い。したがって，この第１消音パイプ１４は，中周波数の騒音に対して消音効果を発揮することができる。   The exhaust gas dispersed in the first expansion chamber 6 flows into the first silencer pipe 14 and flows out to the second expansion chamber 7. The first silencer pipe 14 is formed in a U shape so as to penetrate the first and second partition walls 9, 10, make a U-turn in the third expansion chamber 8, and penetrate the second partition wall 10 again. Since the second expansion chambers 6 and 7 communicate with each other, the flow path length is sufficiently longer than the axial length of the shell 2. Therefore, the first silencing pipe 14 can exert a silencing effect on medium frequency noise.

第１消音パイプ１４から第２膨張室７に出た排ガスは，第２隔壁１０の多数の孔１２，１２…を通過することで，第３膨張室８に広く分散し，これにより残余の高周波騒音を吸収することができる。   The exhaust gas discharged from the first silencer pipe 14 to the second expansion chamber 7 passes through the numerous holes 12, 12... Of the second partition wall 10 and is widely dispersed in the third expansion chamber 8. Noise can be absorbed.

第３膨張室８に分散した排ガスは，第２消音パイプ１５に流入して，それを通過した後，テールパイプ１７を介して大気中へ排出される。上記第２消音パイプ１５は，第１及び第２隔壁９，１０を貫通し，第１膨張室６でＵターンして再び第１及び第２隔壁１０を，更に第２シェル端板５を貫通するようにＵ字状に形成され，第３膨張室８を大気に開放するので，その流路長は，第１消音パイプ１４よりも長い。したがって，この第２消音パイプ１５は，低周波数の騒音に対して消音効果を発揮することができる。   The exhaust gas dispersed in the third expansion chamber 8 flows into the second silencer pipe 15, passes through it, and is then discharged into the atmosphere via the tail pipe 17. The second silencer pipe 15 passes through the first and second partition walls 9 and 10, makes a U-turn in the first expansion chamber 6, and again passes through the first and second partition walls 10, and further passes through the second shell end plate 5. Since the third expansion chamber 8 is opened to the atmosphere, the flow path length is longer than that of the first silencer pipe 14. Therefore, the second silencing pipe 15 can exert a silencing effect against low frequency noise.

かくして，排気マフラＭは，高周波数から低周波数までの広い周波数域において，消音効果を発揮することができる。   Thus, the exhaust muffler M can exhibit a silencing effect in a wide frequency range from a high frequency to a low frequency.

しかも，第１及び第２消音パイプ１４，１５は，シェル２の軸方向と直交する投影面上で交差するように配置されるので，シェル２内にコンパクトに収容することができ，これによってシェル２，即ち排気マフラＭの小型化を図ることができる。   Moreover, since the first and second silencer pipes 14 and 15 are arranged so as to intersect on the projection plane orthogonal to the axial direction of the shell 2, they can be accommodated in the shell 2 in a compact manner. 2. That is, the exhaust muffler M can be reduced in size.

また前記第１シェル端板４には，それに対向する第２消音パイプ１５のＵ字状の屈曲部１５ｃを収容する外方膨出部４ａが形成されるので，第１シェル端板４の剛性を強化と，シェル２のコンパクト化を図りながら第２消音パイプ１５の有効長さを充分に得ることができて，その消音機能を高めることができる。   Further, the first shell end plate 4 is formed with an outward bulging portion 4a that accommodates the U-shaped bent portion 15c of the second muffler pipe 15 facing the first shell end plate 4. The effective length of the second silencing pipe 15 can be sufficiently obtained while the shell 2 is made compact, and the silencing function can be enhanced.

本発明は上記実施形態に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば，高周波数の騒音吸収を考慮しない場合には，第１消音パイプ１４の上流端を第１シェル端板４外まで延出させ，それに排気管１を接続することもできる。また第１消音パイプ１４を，そのＵ字状の屈曲部１４ｃを第２シェル端板５の外方膨出部５ａ内に配置するように形成することもできる。   The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, when high-frequency noise absorption is not considered, the upstream end of the first silencer pipe 14 can be extended to the outside of the first shell end plate 4 and the exhaust pipe 1 can be connected thereto. The first muffler pipe 14 can also be formed such that its U-shaped bent portion 14 c is disposed in the outwardly bulged portion 5 a of the second shell end plate 5.

Ｅ・・・・・・エンジン
Ｍ・・・・・・排気マフラ
１・・・・・・排気管
２・・・・・・シェル
３・・・・・・シェル胴部
４・・・・・・第１シェル端板
５・・・・・・第２シェル端板
６・・・・・・第１膨張室
７・・・・・・第２膨張室
８・・・・・・第３膨張室
９・・・・・・第１隔壁
１０・・・・・第２隔壁
１２・・・・・第２隔壁の多数の孔
１３・・・・・インレットパイプ
１４・・・・・第１消音パイプ
１５・・・・・第２消音パイプ
１６・・・・・インレットパイプの多数の孔 E ... Engine M ... Exhaust muffler 1 ... Exhaust pipe 2 ... Shell 3 ... Shell body 4 ...・ First shell end plate 5... Second shell end plate 6... First expansion chamber 7. Chamber 9... First partition 10... Second partition 12... Many holes 13 in the second partition 13 Inlet pipe 14. Pipe 15 ... second muffler pipe 16 ... many holes in the inlet pipe

Claims (4)

シェル胴部（３），並びにこのシェル胴部（３）の両端に接続される第１及び第２シェル端板（４，５）よりなるシェル（２）と，このシェル（２）内を複数の膨張室（６〜８）に仕切る隔壁（９，１０）と，この隔壁（９，１０）を貫通して，エンジン（Ｅ）の排ガスを所定の膨張室（６）に誘導する第１消音パイプ（１４）と，この第１消音パイプ（１４）から流出した排ガスを，別の所定の膨張室（８）から外部に排出する第２消音パイプ（１５）とを備え，前記第１消音パイプ（１４）は，Ｕ字状の屈曲部（１４ｃ）を前記第２シェル端板（５）側へ向けたＵ字状パイプで構成され，また前記第２消音パイプ（１５）は，Ｕ字状の屈曲部（１５ｃ）を前記第１シェル端板（４）側へ向けたＵ字状パイプで構成される，エンジン用排気マフラにおいて，
前記第１及び第２消音パイプ（１４，１５）を，これらが前記シェル（２）の軸方向と直交する投影面上で交差するように配置したことを特徴とする，エンジン用排気マフラ。 A shell (2) composed of a shell body (3), first and second shell end plates (4, 5) connected to both ends of the shell body (3), and a plurality of insides of the shell (2) Partition walls (9, 10) for partitioning the expansion chambers (6-8), and a first silencing that guides exhaust gas from the engine (E) to the predetermined expansion chamber (6) through the partition walls (9, 10) A pipe (14) and a second silencing pipe (15) for discharging the exhaust gas flowing out of the first silencing pipe (14) from another predetermined expansion chamber (8) to the outside, the first silencing pipe (14) is a U-shaped pipe having a U-shaped bent portion (14c) facing the second shell end plate (5), and the second muffler pipe (15) is U-shaped. Engine exhaust composed of a U-shaped pipe with its bent portion (15c) directed toward the first shell end plate (4) In Hula,
An engine exhaust muffler characterized in that the first and second silencer pipes (14, 15) are arranged so as to intersect on a projection plane orthogonal to the axial direction of the shell (2). 請求項１記載のエンジン用排気マフラにおいて，
前記第１シェル端板（４）に隣接する第１膨張室（６）に，エンジン（Ｅ）の排気管（１）が接続されるインレットパイプ（１３）を配置すると共に，このインレットパイプ（１３）に，前記第１膨張室（６）に開口する多数の孔（１６）を設け，前記第１消音パイプ（１４）の上流端を前記第１膨張室（６）に開口させたことを特徴とする，エンジン用排気マフラ。 The exhaust muffler for an engine according to claim 1,
An inlet pipe (13) to which the exhaust pipe (1) of the engine (E) is connected is disposed in the first expansion chamber (6) adjacent to the first shell end plate (4), and the inlet pipe (13 ), A plurality of holes (16) that open to the first expansion chamber (6) are provided, and the upstream end of the first silencer pipe (14) is opened to the first expansion chamber (6). Exhaust exhaust muffler for engines. 請求項２記載のエンジン用排気マフラにおいて，
前記シェル（２）に，その内部を前記第１シェル端板（４）側から第１，第２及び第３膨張室（６〜８）に仕切る第１及び第２隔壁（９，１０）を設け，その第２隔壁（１０）に，前記第２及び第３膨張室（７，８）間を連通する多数の孔（１２）を設け，前記第１消音パイプ（１４）の下流端を前記第２膨張室（７）に開口させ，下流端を前記第２シェル端板（５）外に開放する前記第２消音パイプ（１５）の上流端を前記第２膨張室（７）に開口させたことを特徴とする，エンジン用排気マフラ。 The exhaust muffler for an engine according to claim 2,
The shell (2) has first and second partition walls (9, 10) for partitioning the inside thereof from the first shell end plate (4) side into first, second and third expansion chambers (6-8). The second partition wall (10) is provided with a number of holes (12) communicating between the second and third expansion chambers (7, 8), and the downstream end of the first silencer pipe (14) is connected to the second partition wall (10). The second expansion chamber (7) is opened, and the upstream end of the second silencer pipe (15) that opens the downstream end to the outside of the second shell end plate (5) is opened to the second expansion chamber (7). An exhaust muffler for engines. 請求項１〜３の何れかに記載のエンジン用排気マフラにおいて，
前記第１及び第２端板（４，５）の少なくとも一方には，それに対向する前記第１消音パイプ（１４）又は第２消音パイプ（１５）のＵ字状の屈曲部（１５ｃ）を収容する外方膨出部（４ａ）を形成したことを特徴とする，エンジン用排気マフラ。 The engine exhaust muffler according to any one of claims 1 to 3,
At least one of the first and second end plates (4, 5) accommodates a U-shaped bent portion (15c) of the first silencing pipe (14) or the second silencing pipe (15) facing the first end plate (4, 5). An exhaust muffler for an engine, characterized in that an outwardly bulging portion (4a) is formed.
JP2012114279A 2012-05-18 2012-05-18 Engine exhaust muffler Expired - Fee Related JP5695599B2 (en)

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WO2019099656A1 (en) * 2017-11-20 2019-05-23 Tenneco Automotive Operating Company Inc. Pipe and metal sheet subassembly for an exhaust treatment device
JP2022030977A (en) * 2020-08-07 2022-02-18 株式会社ユタカ技研 Muffler with built-in valve
CN114109561A (en) * 2021-12-31 2022-03-01 中科灵动航空科技成都有限公司 Silencing device
CN114109562A (en) * 2021-12-31 2022-03-01 中科灵动航空科技成都有限公司 A silencing device for unmanned aerial vehicle power generation system

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CN106351713B (en) * 2016-10-14 2019-05-03 上海天纳克排气***有限公司 Silencer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019099656A1 (en) * 2017-11-20 2019-05-23 Tenneco Automotive Operating Company Inc. Pipe and metal sheet subassembly for an exhaust treatment device
US20190153925A1 (en) * 2017-11-20 2019-05-23 Tenneco Automotive Operating Company Inc. Pipe And Metal Sheet Subassembly For An Exhaust Treatment Device
US10787951B2 (en) 2017-11-20 2020-09-29 Tenneco Automotive Operating Company Inc. Pipe and metal sheet subassembly for an exhaust treatment device
JP2022030977A (en) * 2020-08-07 2022-02-18 株式会社ユタカ技研 Muffler with built-in valve
JP7265509B2 (en) 2020-08-07 2023-04-26 株式会社ユタカ技研 Silencer with built-in valve
CN114109561A (en) * 2021-12-31 2022-03-01 中科灵动航空科技成都有限公司 Silencing device
CN114109562A (en) * 2021-12-31 2022-03-01 中科灵动航空科技成都有限公司 A silencing device for unmanned aerial vehicle power generation system
CN114109561B (en) * 2021-12-31 2024-05-28 中科灵动航空科技成都有限公司 Silencing device
CN114109562B (en) * 2021-12-31 2024-05-28 中科灵动航空科技成都有限公司 Silencer for unmanned aerial vehicle power generation system

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