JPH0777025A - Silencer - Google Patents

Silencer

Info

Publication number
JPH0777025A
JPH0777025A JP16124294A JP16124294A JPH0777025A JP H0777025 A JPH0777025 A JP H0777025A JP 16124294 A JP16124294 A JP 16124294A JP 16124294 A JP16124294 A JP 16124294A JP H0777025 A JPH0777025 A JP H0777025A
Authority
JP
Japan
Prior art keywords
pipe
silencer
exhaust
chamber
shell
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP16124294A
Other languages
Japanese (ja)
Inventor
Akira Imamoto
暁 今本
Hiroyuki Aihara
広之 相原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Calsonic Corp
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 Calsonic Corp filed Critical Calsonic Corp
Priority to JP16124294A priority Critical patent/JPH0777025A/en
Publication of JPH0777025A publication Critical patent/JPH0777025A/en
Pending legal-status Critical Current

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  • Exhaust Silencers (AREA)

Abstract

PURPOSE:To provide a silencer which reduces generation of the radiant noise from a shell by exhaust pulsation and reduces air current noise in addition. CONSTITUTION:In a silencer, where the inside of a shell 1 both openings of which are blocked with end plates 3 and 5 is partitioned with a plurality of baffle plates 7 and 8 and a chamber 13 where the end of the inserted exhaust pipe 17 opens is an expansion chamber, the end of the inserted exhaust pipe 17 is made larger in diameter than the exhaust pipe 17, and besides it is covered with a foaming metallic pipe 25 consisting of many continuous pore bodies.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、車両排気系に装着され
る消音器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencer mounted on a vehicle exhaust system.

【0002】[0002]

【従来の技術】車両走行時の排気騒音を低減するため、
従来、車両排気系には実開平2−24024号公報又は
図13に示すような消音器が装着されており、斯かる消
音器の拡張室に於ける拡張減衰作用や共鳴室での共鳴減
衰作用によって排気騒音を消音している。
2. Description of the Related Art In order to reduce exhaust noise when a vehicle is running,
Conventionally, a vehicle exhaust system is equipped with a muffler as shown in Japanese Utility Model Laid-Open No. 2-24024 or FIG. 13, and the muffler has an expansion damping action in an expansion chamber and a resonance damping action in a resonance chamber. The exhaust noise is silenced by.

【0003】図13中、1は両端開口をエンドプレート
3,5で閉塞したシェルで、シェル1の内部は、図14
に示すような2枚のバッフルプレート7,9によって、
上流側のエンドプレート3側から第1室11,第2室1
3,第3室15の3つの室が区画形成されている。
In FIG. 13, reference numeral 1 denotes a shell whose both end openings are closed by end plates 3 and 5, and the inside of the shell 1 is shown in FIG.
With two baffle plates 7 and 9 as shown in
From the upstream end plate 3 side, the first chamber 11 and the second chamber 1
Three chambers, the third chamber 15 and the third chamber 15, are defined.

【0004】そして、上流側のエンドプレート3にはバ
ッフルプレート7を貫通して排気導入管17が挿着され
ており、その挿入側端部は第2室13に開口している。
又、下流側のエンドプレート5にはバッフルプレート
7,9を貫通して排気導出管19が挿着されており、排
気導出管19はその挿入側端部が第1室11に開口して
いる。
An exhaust gas introducing pipe 17 is inserted into the upstream end plate 3 so as to pass through the baffle plate 7, and the end portion on the insertion side is open to the second chamber 13.
Further, an exhaust lead-out pipe 19 is inserted into the downstream end plate 5 so as to penetrate the baffle plates 7 and 9, and the exhaust lead-out pipe 19 has an end portion on the insertion side which is open to the first chamber 11. .

【0005】更に、バッフルプレート9には、第2室1
3と第3室15とを連通する共鳴管21が排気導入管1
7と同軸上に挿着され、又、バッフルプレート7には第
1室11と第2室13とを連通する1本の連通管23が
挿着されており、斯かる構成によって第1室11と第2
室13が拡張室として機能し、第3室15が共鳴室とし
て機能するようになっている。
Further, the baffle plate 9 has a second chamber 1
The resonance pipe 21 that connects the third chamber 15 and the third chamber 15 to each other is the exhaust gas introduction pipe 1
7, and a baffle plate 7 is fitted with a single communication pipe 23 that connects the first chamber 11 and the second chamber 13 to each other. And the second
The chamber 13 functions as an expansion chamber, and the third chamber 15 functions as a resonance chamber.

【0006】[0006]

【発明が解決しようとする課題】然し乍ら、上述した従
来の消音器にあっては、排気導入管17を介して消音器
に導入された排気ガスが第2室13へ流入する際に、排
気導入管17の挿入側端部のエッジ部分から2次発生音
(気流音)が生じてしまう欠点があり、又、排気ガスの
流入に伴う排気脈動でシェル1が共振し、シェル1から
輻射音が発生してしまう欠点もあった。
However, in the above-described conventional silencer, when the exhaust gas introduced into the silencer through the exhaust introduction pipe 17 flows into the second chamber 13, the exhaust introduction is performed. There is a drawback that a secondary generated sound (air flow sound) is generated from the edge portion of the end of the pipe 17 on the insertion side, and the shell 1 resonates due to exhaust pulsation accompanying the inflow of exhaust gas, and the sound emitted from the shell 1 is emitted. There was also a drawback that it would occur.

【0007】そして、昨今、消音器の軽量化を図る目的
でシェル1の薄肉化が図られているが、シェル1の薄肉
化に伴い排気脈動による輻射音の発生が著しく、この点
が消音器の軽量化を図るうえで解決すべき課題として残
されていた。
In recent years, the shell 1 has been made thinner in order to reduce the weight of the silencer. However, as the shell 1 becomes thinner, the emission noise due to the pulsation of the exhaust gas is remarkably generated. It was left as a problem to be solved in order to reduce the weight of.

【0008】本発明は斯かる実情に鑑み案出されたもの
で、排気脈動によるシェルからの輻射音の発生を軽減
し、併せて気流音の低減を図った消音器を提供すること
を目的とする。
The present invention has been devised in view of the above circumstances, and an object thereof is to provide a silencer that reduces the generation of radiation noise from the shell due to exhaust pulsation and also reduces the air flow noise. To do.

【0009】[0009]

【課題を解決するための手段】斯かる目的を達成するた
め、請求項1に係る発明は、両端開口をエンドプレート
で閉塞したシェル内を複数のバッフルプレートで仕切っ
て、排気導入管の挿入側端部が開口する室を拡張室とし
た消音器に於て、上記排気導入管の挿入側端部を、排気
導入管よりも大径に成形され、且つ多数の連続気孔体か
らなる発泡金属パイプで覆ったことを特徴とする。
In order to achieve such an object, the invention according to claim 1 is such that a shell having both end openings closed by end plates is partitioned by a plurality of baffle plates to insert an exhaust gas introducing pipe. In a muffler having a chamber having an open end as an expansion chamber, a foam metal pipe having a large diameter at the insertion side end of the exhaust gas introduction pipe and having a larger diameter than the exhaust gas introduction pipe and comprising a plurality of continuous pores. It is characterized by being covered with.

【0010】そして、請求項2に係る発明は、請求項1
記載の消音器に於て、発泡金属パイプは、拡張室を区画
形成する2つのバッフルプレート間に架設され、両バッ
フルプレートには、複数の切欠きが同一円周上に対向し
て設けられると共に、発泡金属パイプの両端部には、当
該各切欠きに係合可能な複数の突片が形成されているこ
とを特徴とする。
The invention according to claim 2 is the invention according to claim 1.
In the silencer described above, the foam metal pipe is installed between two baffle plates partitioning and forming an expansion chamber, and both baffle plates are provided with a plurality of notches facing each other on the same circumference. A plurality of projecting pieces that can be engaged with the respective notches are formed at both ends of the foam metal pipe.

【0011】又、請求項3に係る発明は、請求項1記載
の消音器に於て、発泡金属パイプは、拡張室を区画形成
する2つのバッフルプレート又はバッフルプレートとエ
ンドプレート間に架設され、両バッフルプレート又はバ
ッフルプレートとエンドプレートには、発泡金属パイプ
の両端部を支持する突出部が、拡張室側へ同一円周上に
対向して突設されていることを特徴とする。
According to a third aspect of the present invention, in the muffler according to the first aspect, the metal foam pipe is installed between two baffle plates or baffle plates and an end plate that define an expansion chamber, The both baffle plates or the baffle plate and the end plate are characterized in that projecting portions for supporting both ends of the metal foam pipe are provided so as to project toward the expansion chamber on the same circumference.

【0012】そして、請求項4に係る発明は、両端開口
をエンドプレートで閉塞したシェル内を複数のバッフル
プレートで仕切って、排気導入管の挿入側端部が開口す
る室を拡張室とした消音器に於て、上記排気導入管の挿
入側端部を、排気導入管よりも大径に成形され、且つ周
壁に多数の小孔を有する開口率100%以上の多孔パイ
プで覆ったものである。
[0012] In the invention according to claim 4, the inside of the shell whose both end openings are closed by the end plates is partitioned by a plurality of baffle plates, and the chamber in which the end portion on the insertion side of the exhaust introduction pipe is opened is an expansion chamber. In the container, the end portion of the exhaust introduction pipe on the insertion side is covered with a porous pipe having a diameter larger than that of the exhaust introduction pipe and having a large number of small holes in the peripheral wall and an opening ratio of 100% or more. .

【0013】[0013]

【作用】各請求項に記載の発明によれば、エンジンが駆
動すると、排気ガスが排気導入管を介して消音器内に流
入し、これに伴い排気脈動が消音器内に伝播されるが、
排気導入管を介して消音器内に伝播された排気脈動は、
排気導入管の挿入側端部を覆う発泡金属パイプの連続気
孔や多孔パイプの小孔を通過する際に減衰されることと
なる。
According to the invention described in each claim, when the engine is driven, the exhaust gas flows into the muffler through the exhaust introduction pipe, and the exhaust pulsation is propagated in the muffler accordingly.
The exhaust pulsation propagated into the silencer via the exhaust introduction pipe is
It will be attenuated when passing through the continuous pores of the foam metal pipe or the small holes of the perforated pipe covering the insertion side end of the exhaust gas introduction pipe.

【0014】一方、排気導入管を介して消音器に流入し
た排気ガスは、発泡金属パイプの連続気孔や多孔パイプ
の小孔を通過する際に整流されて拡張室に拡散する。
On the other hand, the exhaust gas flowing into the silencer via the exhaust introduction pipe is rectified and diffuses into the expansion chamber when passing through the continuous pores of the foam metal pipe or the small holes of the porous pipe.

【0015】[0015]

【実施例】以下、本発明の実施例を図面に基づき詳細に
説明する。尚、図13に示す従来例と同一のものは同一
符号を付してそれらの構造説明は省略する。
Embodiments of the present invention will now be described in detail with reference to the drawings. The same parts as those of the conventional example shown in FIG. 13 are designated by the same reference numerals, and their structural description will be omitted.

【0016】図1乃至図5は請求項1及び請求項2に係
る消音器の第一実施例を示し、図1に於て、25は排気
導入管17の挿入側端部17aと共鳴管21の一端部2
1aを覆ってバッフルプレート7,9間に架設された発
泡金属パイプ、27は同じく連通管23の一端部23a
を覆ってバッフルプレート7,9間に架設された発泡金
属パイプで、両発泡金属パイプ25,27は、夫々、金
属に無数の連続気孔を発生させた発泡(海綿)状の無機
材料(例えば、多孔性アルミニウム材,多孔性ニッケル
材)を筒状に成形した連続気孔体からなるパイプ部材
で、排気導入管17,共鳴管21及び連通管23よりも
大径に成形されている。
1 to 5 show a first embodiment of a silencer according to claims 1 and 2, and in FIG. 1, reference numeral 25 is an insertion side end portion 17a of an exhaust introduction pipe 17 and a resonance pipe 21. One end 2
A metal foam pipe is provided between the baffle plates 7 and 9 so as to cover 1a, and 27 is also one end 23a of the communication pipe 23.
Is a foam metal pipe that is installed between the baffle plates 7 and 9 and covers both of the foam metal pipes 25 and 27. Each of the foam metal pipes 25 and 27 is a foam (sponge) -shaped inorganic material (for example, It is a pipe member made of a continuous porous body formed by cylindrically forming (porous aluminum material, porous nickel material), and has a larger diameter than the exhaust introduction pipe 17, the resonance pipe 21, and the communication pipe 23.

【0017】尚、この発泡金属は発泡度により種々の種
類があるが、一般に発泡金属と称するものは多孔率が8
0〜90%であり、これらの範囲であれば、どのような
種類でも本発明に利用できる。
There are various types of foamed metal depending on the degree of foaming, but generally, what is called foamed metal has a porosity of 8
It is 0 to 90%, and any type within this range can be used in the present invention.

【0018】そして、図2及び図3に示すように各発泡
金属パイプ25,27の両端部には、夫々、8個の突片
25a,27aが等間隔に一体成形されている。一方、
第1室11と第2室13を仕切るバッフルプレート7に
は、図4の如く排気導入管挿着孔29及び連通管挿着孔
31の周囲に、夫々、上記各突片25a,27aに対応
して切欠き7aが同一円周上に設けられている。
As shown in FIGS. 2 and 3, eight projecting pieces 25a and 27a are integrally formed at equal intervals on both ends of the foam metal pipes 25 and 27, respectively. on the other hand,
The baffle plate 7 that separates the first chamber 11 and the second chamber 13 corresponds to the protrusions 25a and 27a around the exhaust introduction pipe insertion hole 29 and the communication pipe insertion hole 31, respectively, as shown in FIG. Then, the notch 7a is provided on the same circumference.

【0019】又、図5に示すように第2室13と第3室
15を仕切るバッフルプレート9にも、同様にバッフル
プレート7に設けた切欠き7aに対向して切欠き9aが
同一円周上に設けられており、発泡金属パイプ25,2
7の各突片25a,27aが各切欠き7a,9aに係合
して、排気導入管17の挿入側端部17aと共鳴管21
の一端部21aを覆って発泡金属パイプ25がバッフル
プレート7,9間に架設され、そして、連通管23の一
端部23aを覆ってバッフルプレート7,9間に発泡金
属パイプ27が架設されている。
As shown in FIG. 5, the baffle plate 9 for partitioning the second chamber 13 and the third chamber 15 also has a notch 9a facing the notch 7a formed in the baffle plate 7 and having the same notch 9a. The metal foam pipes 25, 2 provided above
7, the protrusions 25a and 27a of the valve 7 engage with the notches 7a and 9a, respectively, and the insertion side end portion 17a of the exhaust gas introducing pipe 17 and the resonance pipe 21.
A foam metal pipe 25 is installed between the baffle plates 7 and 9 so as to cover one end 21a of the same, and a foam metal pipe 27 is installed between the baffle plates 7 and 9 so as to cover one end 23a of the communication pipe 23. .

【0020】而して、本実施例に係る消音器は、上述し
たように各突片25a,27aを切欠き7a,9aに係
合してバッフルプレート7,9間に発泡金属パイプ2
5,27を架設し、次いでバッフルプレート7,9に排
気導入管17,排気導出管19,共鳴管21及び連通管
23を夫々挿着した後、これらをシェル1内に収納して
その両端開口部をエンドプレート3,5で閉塞すること
によって形成される。
Thus, in the muffler according to this embodiment, as described above, the projecting pieces 25a, 27a are engaged with the notches 7a, 9a so that the foam metal pipe 2 is provided between the baffle plates 7, 9.
5, 27, and then the exhaust introduction pipe 17, the exhaust discharge pipe 19, the resonance pipe 21, and the communication pipe 23 are respectively attached to the baffle plates 7, 9, and then these are housed in the shell 1 to open both ends thereof. It is formed by closing the portion with the end plates 3 and 5.

【0021】そして、図13に示す消音器と同様、バッ
フルプレート7,9で区画形成される第2室13が拡張
室として機能し、又、当該第2室13と共鳴管21を介
して連通する第3室15が共鳴室として機能し、更に第
2室13と連通管23を介して連通する第1室11に排
気導出管19が開口して、第1室11が拡張室として機
能するようになっている。
As with the silencer shown in FIG. 13, the second chamber 13 defined by the baffle plates 7 and 9 functions as an expansion chamber, and communicates with the second chamber 13 via the resonance tube 21. The third chamber 15 functions as a resonance chamber, and the exhaust outlet pipe 19 opens to the first chamber 11 that communicates with the second chamber 13 via the communication pipe 23, and the first chamber 11 functions as an expansion chamber. It is like this.

【0022】本実施例に係る消音器はこのように構成さ
れているから、エンジンが駆動すると、排気ガスが排気
導入管17を介して消音器内に流入し、又、これに伴い
排気脈動が消音器内に伝播されるが、排気導入管17を
介して消音器内に伝播された排気脈動は、排気導入管1
7の挿入側端部17aと共鳴管21の一端部21aを覆
う発泡金属パイプ25の無数の連続気孔を通過する際に
減衰される。
Since the muffler according to the present embodiment is constructed in this way, when the engine is driven, exhaust gas flows into the muffler through the exhaust introduction pipe 17, and exhaust pulsation is accompanied by this. The exhaust pulsation propagated into the silencer, but propagated into the silencer via the exhaust introduction pipe 17, the exhaust introduction pipe 1
It is attenuated when passing through the innumerable continuous pores of the metal foam pipe 25 that covers the insertion-side end 17a of No. 7 and the one end 21a of the resonance tube 21.

【0023】そして、斯様に減衰された排気脈動は従来
の排気脈動に比しレベルが著しく低減したものとなるの
で、排気脈動によるシェル1の共振が軽減し、因って、
シェル1からの輻射音の発生が防止できると共に、消音
器の耐圧性能の悪化影響を軽減できることとなる。
The exhaust pulsation thus attenuated has a significantly reduced level as compared with the conventional exhaust pulsation, so that the resonance of the shell 1 due to the exhaust pulsation is reduced, and
Radiation noise from the shell 1 can be prevented, and the adverse effect on the pressure resistance of the silencer can be reduced.

【0024】又、排気導入管17を介して消音器内に流
入した排気ガスは、発泡金属パイプ25の無数の連続気
孔を通過して第2室13に拡散した後、発泡金属パイプ
27の無数の連続気孔を通過して連通管23に流入する
が、排気ガスは発泡金属パイプ25,27の無数の連続
気孔を通過する際に整流される。
The exhaust gas flowing into the muffler through the exhaust introduction pipe 17 passes through the numerous continuous pores of the foam metal pipe 25, diffuses into the second chamber 13, and then the count of foam metal pipe 27. The exhaust gas is rectified when passing through the infinite number of continuous pores of the foam metal pipes 25 and 27.

【0025】従って、本実施例によれば、排気脈動によ
るシェル1の共振で輻射音が発生してしまうといった従
来の欠点が解消でき、消音器の耐圧性能の悪化影響を軽
減できると共に、排気ガスが直接シェル1に当たらない
ためシェル1への熱伝達が軽減してシェル1の熱変形が
軽減され、更に又、バッフルプレート7,9間に架設し
た発泡金属パイプ25,27が補強材として機能し消音
器の剛性を高めることも相俟って、シェル1の薄肉化が
図れ、消音器の軽量化に寄与することとなる。
Therefore, according to this embodiment, it is possible to solve the conventional drawback that the radiation noise is generated due to the resonance of the shell 1 due to the exhaust pulsation, and it is possible to reduce the adverse effect of the pressure resistance of the silencer and to reduce the exhaust gas. Does not directly contact the shell 1 so that heat transfer to the shell 1 is reduced and thermal deformation of the shell 1 is reduced. Furthermore, the metal foam pipes 25 and 27 installed between the baffle plates 7 and 9 function as a reinforcing material. In combination with increasing the rigidity of the silencer, the thickness of the shell 1 can be reduced, which contributes to weight reduction of the silencer.

【0026】又、上述したように本実施例によれば、排
気ガスが発泡金属パイプ25,27の無数の連続気孔を
通過する際に整流されるので、従来に比し気流音の発生
を軽減できる効果を有する。
Further, as described above, according to this embodiment, the exhaust gas is rectified when passing through the innumerable continuous pores of the foam metal pipes 25 and 27, so that the generation of air flow noise is reduced as compared with the conventional case. Has the effect that can.

【0027】尚、上記第一実施例は、排気導入管17と
同軸上に共鳴管21を配置した消音器に請求項1及び請
求項2に係る発明を適用したものであるが、図6に示す
第二実施例のように共鳴管21が排気導入管17と同軸
上に配置されていない消音器では、バッフルプレート
7,9に夫々切欠き7a,9aを同一円周上に対向して
設け、そして、各切欠き7a,9aに突片25aを係合
させて発泡金属パイプ25をバッフルプレート7,9間
に架設し、当該発泡金属パイプ25で排気導入管17の
挿入側端部17aを覆えばよい。
In the first embodiment, the invention according to claims 1 and 2 is applied to the muffler in which the resonance pipe 21 is arranged coaxially with the exhaust introduction pipe 17, but FIG. In the muffler in which the resonance pipe 21 is not arranged coaxially with the exhaust introduction pipe 17 as in the second embodiment shown, the baffle plates 7 and 9 are provided with notches 7a and 9a, respectively, on the same circumference so as to face each other. Then, the foam metal pipe 25 is installed between the baffle plates 7 and 9 by engaging the projecting pieces 25a with the respective cutouts 7a and 9a, and the insertion side end portion 17a of the exhaust gas introducing pipe 17 is connected by the foam metal pipe 25. Just cover it.

【0028】而して、斯かる第二実施例によっても、上
記第一実施例と同様、排気脈動によるシェル1の共振で
輻射音が発生してしまうといった従来の欠点が解消で
き、消音器の耐圧性能の悪化影響を軽減できると共に、
排気ガスが直接シェル1に当たらないためシェル1への
熱伝達が軽減してシェル1の熱変形が軽減され、更に
又、バッフルプレート7,9間に架設した発泡金属パイ
プ25が補強材として機能し消音器の剛性を高めること
も相俟って、シェル1の薄肉化が図れ、消音器の軽量化
に寄与することとなる。
Thus, also in the second embodiment, as in the first embodiment, the conventional defect that the radiation sound is generated due to the resonance of the shell 1 due to the exhaust pulsation can be solved, and the silencer of the silencer can be eliminated. In addition to being able to reduce the adverse effect of pressure resistance,
Since the exhaust gas does not directly hit the shell 1, heat transfer to the shell 1 is reduced and thermal deformation of the shell 1 is reduced. Furthermore, the foam metal pipe 25 laid between the baffle plates 7 and 9 functions as a reinforcing material. In combination with increasing the rigidity of the silencer, the thickness of the shell 1 can be reduced, which contributes to weight reduction of the silencer.

【0029】図7は請求項1及び請求項3に係る消音器
の第一実施例の要部拡大断面図、そして、図8は図7の
VIII−VIII線断面図を示し、図7中、33は排気導入管
17の挿入側端部17aと共鳴管21の一端部21aを
覆ってバッフルプレート7,9間に架設された発泡金属
パイプで、当該発泡金属パイプ33は、上記発泡金属パ
イプ25と同一の材料によってバッフルプレート7,9
間の間隔と同一寸法に成形され、そして、排気導入管1
7や共鳴管21よりも大径に成形されている。
FIG. 7 is an enlarged sectional view of the essential parts of a first embodiment of a silencer according to claims 1 and 3, and FIG. 8 is a view of FIG.
7 shows a cross-sectional view taken along the line VIII-VIII, and in FIG. 7, reference numeral 33 denotes a foam metal pipe which is installed between the baffle plates 7 and 9 so as to cover the insertion side end portion 17a of the exhaust introduction pipe 17 and the one end portion 21a of the resonance pipe 21. The foam metal pipe 33 is made of the same material as that of the foam metal pipe 25.
The exhaust introduction pipe 1 is formed to have the same size as the space between
7 and the resonance tube 21 are formed to have a larger diameter.

【0030】又、35,37は第2室13側へ突出する
ようにバッフルプレート7に突設されたビード形状の突
出部で、両突出部35,37は、図8に示すように上記
発泡金属パイプ33の肉厚分の間隔を開けて排気導入管
挿着孔29の周囲に、夫々、同一円周上に突設されてお
り、両突出部35,37間で発泡金属パイプ33の一端
を支持できるようになっている。
Further, 35 and 37 are bead-shaped projecting portions projectingly provided on the baffle plate 7 so as to project toward the second chamber 13, and both projecting portions 35 and 37 are foamed as shown in FIG. Around the exhaust introduction pipe insertion hole 29 with a space corresponding to the thickness of the metal pipe 33, the metal pipe 33 is projected on the same circumference, and one end of the foam metal pipe 33 is provided between the protruding portions 35 and 37. Can be supported.

【0031】一方、バッフルプレート9にも、上記各突
出部35,37と同一形状の突出部39,41が、当該
突出部35,37に対応して第2室13側へ突設されて
おり、上述したように突出部35,37間で発泡金属パ
イプ33の一端を支持し、且つ当該突出部39,41間
で発泡金属パイプ33の他端側を支持することによっ
て、バッフルプレート7,9間に発泡金属パイプ33が
架設されている。
On the other hand, the baffle plate 9 is also provided with projections 39 and 41 having the same shape as the above projections 35 and 37 so as to project toward the second chamber 13 in correspondence with the projections 35 and 37. By supporting one end of the metal foam pipe 33 between the protrusions 35 and 37 and supporting the other end of the metal foam pipe 33 between the protrusions 39 and 41 as described above, the baffle plates 7 and 9 are A foam metal pipe 33 is installed between them.

【0032】而して、本実施例に係る消音器も、上述し
たようにバッフルプレート7,9間に発泡金属パイプ3
3を架設した後、バッフルプレート7,9に排気導入管
17,排気導出管19,共鳴管21及び連通管23を挿
着し、これらをシェル1内に収納してその両端開口部を
エンドプレート3,5で閉塞することによって形成され
る。
Thus, the muffler according to this embodiment also has the foam metal pipe 3 between the baffle plates 7 and 9 as described above.
3, the exhaust introduction pipe 17, the exhaust discharge pipe 19, the resonance pipe 21, and the communication pipe 23 are inserted and attached to the baffle plates 7 and 9, and these are housed in the shell 1 and the openings at both ends thereof are end plates. It is formed by closing at 3,5.

【0033】本実施例に係る消音器はこのように構成さ
れており、エンジンが駆動すると、排気ガスが排気導入
管17を介して消音器内に流入し、又、これに伴い排気
脈動が消音器内に伝播されるが、本実施例によっても、
排気導入管17を介して消音器内に伝播された排気脈動
は、排気導入管17の挿入側端部17aと共鳴管21の
一端部21aを覆う発泡金属パイプ33の無数の連続気
孔を通過する際に減衰されることとなる。
The muffler according to this embodiment is constructed in this way, and when the engine is driven, exhaust gas flows into the muffler through the exhaust introduction pipe 17, and the exhaust pulsation is muffled accordingly. Although it is propagated inside the container, this embodiment also
The exhaust pulsation propagated into the muffler through the exhaust introduction pipe 17 passes through the numerous continuous pores of the foam metal pipe 33 that covers the insertion-side end 17a of the exhaust introduction pipe 17 and the one end 21a of the resonance pipe 21. It will be attenuated.

【0034】そして、斯様に減衰された排気脈動は従来
の排気脈動に比しレベルが著しく低減したものとなるの
で、排気脈動によるシェル1の共振が軽減し、因って、
シェル1からの輻射音の発生が防止できると共に、消音
器の耐圧性能の悪化影響を軽減できることとなる。
The exhaust pulsation thus attenuated has a significantly reduced level as compared with the conventional exhaust pulsation, so that the resonance of the shell 1 due to the exhaust pulsation is reduced, and
Radiation noise from the shell 1 can be prevented, and the adverse effect on the pressure resistance of the silencer can be reduced.

【0035】又、排気導入管17を介して消音器内に流
入した排気ガスは、発泡金属パイプ33の無数の連続気
孔を通過して第2室13に拡散した後、連通管23に流
入するが、排気ガスは発泡金属パイプ33の無数の連続
気孔を通過する際に整流される。
Further, the exhaust gas flowing into the muffler through the exhaust introduction pipe 17 passes through the numerous continuous pores of the foam metal pipe 33, diffuses into the second chamber 13, and then flows into the communication pipe 23. However, the exhaust gas is rectified as it passes through the numerous continuous pores of the foam metal pipe 33.

【0036】従って、本実施例によっても、図1に示す
実施例と同様、排気脈動によるシェル1の共振で輻射音
が発生してしまうといった従来の欠点が解消でき、又、
消音器の耐圧性能の悪化影響を軽減できると共に、排気
ガスが直接シェル1に当たらないためシェル1への熱伝
達が軽減してシェル1の熱変形が軽減され、更に又、バ
ッフルプレート7,9間に架設した発泡金属パイプ33
が補強材として機能し消音器の剛性を高めることも相俟
って、シェル1の薄肉化が図れ、消音器の軽量化に寄与
することが可能となる。
Therefore, according to this embodiment, as in the embodiment shown in FIG. 1, it is possible to eliminate the conventional drawback that the radiation sound is generated due to the resonance of the shell 1 due to the exhaust pulsation, and
It is possible to reduce the influence of deterioration of the pressure resistance performance of the silencer, and since exhaust gas does not directly hit the shell 1, heat transfer to the shell 1 is reduced and thermal deformation of the shell 1 is reduced, and furthermore, the baffle plates 7 and 9 are also reduced. Foamed metal pipe 33 installed between
Also functions as a reinforcing material to increase the rigidity of the muffler, and the thickness of the shell 1 can be reduced to contribute to the weight reduction of the muffler.

【0037】又、上述したように、排気ガスは発泡金属
パイプ33の無数の連続気孔を通過する際に気流が整流
されるので、従来に比し気流音の発生を軽減できる利点
を有する。
Further, as described above, since the exhaust gas is rectified as it flows through the numerous continuous pores of the foam metal pipe 33, there is an advantage that the generation of air flow noise can be reduced as compared with the conventional case.

【0038】尚、上記実施例では、図7及び図8に示す
ように発泡金属パイプ33の肉厚分の間隔を開けてバッ
フルプレート7,9に、夫々、突出部35,37,3
9,41を同一円周上に突設したが、斯かる構造に代
え、例えば図9に示す実施例のように、発泡金属パイプ
33の外周端部に当接して当該発泡金属パイプ33を支
持する突出部37,41をバッフルプレート7,9に設
けてもよいし、又、図10に示す実施例のように、発泡
金属パイプ33の内周端部に当接して当該発泡金属パイ
プ33を支持する突出部35,39をバッフルプレート
7,9に設けてもよく、更に又、図11に示す実施例の
如く突出部35,37,39,41を発泡金属パイプ3
3の内外周に交互に設けて発泡金属パイプ33を支持さ
せてもよく、これらの各実施例によっても、発泡金属パ
イプ33をバッフルプレート7,9間に架設することが
できるので、当該発泡金属パイプ33で排気導入管17
の挿入側端部17aを覆うことにより、上記各実施例と
同様、所期の目的を達成することが可能である。
In the above-described embodiment, as shown in FIGS. 7 and 8, the baffle plates 7 and 9 are provided with a gap corresponding to the thickness of the foam metal pipe 33, and the protrusions 35, 37 and 3 are respectively formed.
9, 41 are provided on the same circumference, but instead of such a structure, as in the embodiment shown in FIG. 9, for example, the foam metal pipe 33 is supported by abutting the outer peripheral end of the foam metal pipe 33. The protrusions 37, 41 may be provided on the baffle plates 7, 9 or, as in the embodiment shown in FIG. 10, the foam metal pipe 33 is brought into contact with the inner peripheral end portion of the foam metal pipe 33. Protrusions 35 and 39 for supporting may be provided on the baffle plates 7 and 9, and the protrusions 35, 37, 39 and 41 may be provided on the foam metal pipe 3 as in the embodiment shown in FIG.
The foam metal pipe 33 may be alternately provided on the inner and outer peripheries of 3 to support the foam metal pipe 33, and the foam metal pipe 33 can be installed between the baffle plates 7 and 9 in each of these embodiments. Exhaust gas introduction pipe 17 with pipe 33
By covering the insertion side end portion 17a of the above, it is possible to achieve the intended purpose as in the above embodiments.

【0039】又、図7及び図8に示す実施例では、突出
部35,37,39,41をバッフルプレート7,9に
設けたが、排気導入管17が開口する拡張室がバッフル
プレートとエンドプレートで区画形成される消音器に於
ては、当該バッフルプレートとエンドプレートに、夫
々、突出部35,37,39,41を形成すればよい。
Further, in the embodiment shown in FIGS. 7 and 8, the protrusions 35, 37, 39, 41 are provided on the baffle plates 7, 9, but the expansion chamber where the exhaust introduction pipe 17 is opened is the baffle plate and the end. In the muffler partitioned by the plate, the protrusions 35, 37, 39 and 41 may be formed on the baffle plate and the end plate, respectively.

【0040】図12は請求項4に係る消音器の一実施例
の要部拡大断面図を示し、図中、43は排気導入管17
の挿入側端部17aと、当該排気導入管17と同軸上に
配置された共鳴管21の一端部21aを覆ってバッフル
プレート7の多孔パイプ挿着孔45に挿着された多孔パ
イプで、その一端はバッフルプレート9に溶着されてい
る。
FIG. 12 is an enlarged sectional view of an essential part of an embodiment of a silencer according to claim 4, in which 43 is an exhaust introduction pipe 17.
Of the perforated pipe inserted into the perforated pipe insertion hole 45 of the baffle plate 7 so as to cover the insertion-side end portion 17a and the one end portion 21a of the resonance pipe 21 arranged coaxially with the exhaust introduction pipe 17. One end is welded to the baffle plate 9.

【0041】而して、上記多孔パイプ43は、周壁に多
数の小孔47が形成された開口率130%のパイプ部材
で、排気導入管17及び共鳴管21及び連通管23より
も大径に成形されている。
The perforated pipe 43 is a pipe member having a large number of small holes 47 in the peripheral wall and an opening ratio of 130%, and has a larger diameter than the exhaust introduction pipe 17, the resonance pipe 21, and the communication pipe 23. It is molded.

【0042】尚、本実施例に於ては、開口率が100%
未満のパイプ部材は背圧が高くなって好ましくないた
め、開口率100%以上の適当な開口率の各種パイプ部
材が多孔パイプ43として選択される。
In this embodiment, the aperture ratio is 100%.
Since a pipe member of less than 100% is not preferable because the back pressure becomes high, various pipe members having an appropriate opening ratio of 100% or more are selected as the porous pipe 43.

【0043】本実施例に係る消音器はこのように構成さ
れており、上記各実施例と同様、エンジンが駆動する
と、排気ガスが排気導入管17を介して消音器内に流入
し、又、これに伴い排気脈動が消音器内に伝播される
が、排気導入管17を介して消音器内に伝播された排気
脈動の多くは、排気導入管17の挿入側端部17aと共
鳴管21の一端部21aを覆う多孔パイプ43の多数の
小孔47を通過し乍ら減衰されることとなる。
The muffler according to this embodiment is constructed in this way, and like the above embodiments, when the engine is driven, the exhaust gas flows into the muffler through the exhaust introduction pipe 17, and Along with this, the exhaust pulsation is propagated into the muffler, but most of the exhaust pulsation propagated into the muffler via the exhaust introduction pipe 17 is due to the insertion side end 17 a of the exhaust introduction pipe 17 and the resonance pipe 21. After passing through a large number of small holes 47 of the perforated pipe 43 covering the one end 21a, it is attenuated.

【0044】そして、斯様に減衰された排気脈動は従来
の排気脈動に比しレベルが著しく低減したものとなるの
で、排気脈動によるシェル1の共振が軽減し、因って、
シェル1からの輻射音の発生が防止できると共に、消音
器の耐圧性能の悪化影響を軽減できることとなる。
Since the exhaust pulsation thus attenuated has a significantly reduced level as compared with the conventional exhaust pulsation, the resonance of the shell 1 due to the exhaust pulsation is reduced, and
Radiation noise from the shell 1 can be prevented, and the adverse effect on the pressure resistance of the silencer can be reduced.

【0045】又、排気導入管17を介して消音器内に流
入した排気ガスの多くが、多孔パイプ43の多数の小孔
47を通過して第2室13に拡散するが、排気ガスは多
数の小孔47を通過する際に整流される。
Most of the exhaust gas flowing into the muffler through the exhaust introduction pipe 17 passes through the many small holes 47 of the perforated pipe 43 and diffuses into the second chamber 13, but many exhaust gas is emitted. It is rectified when passing through the small holes 47 of the.

【0046】従って、本実施例によっても、上記各実施
例と同様、排気脈動によるシェル1の共振で輻射音が発
生してしまうといった従来の欠点が解消でき、消音器の
耐圧性能の悪化影響を軽減できると共に、排気ガスが直
接シェル1に当たらないためシェル1への熱伝達が軽減
してシェル1の熱変形が軽減され、更に又、バッフルプ
レート7,9間に架設した多孔パイプ43が補強材とし
て機能し消音器の剛性を高めることも相俟って、シェル
1の薄肉化が図れ、消音器の軽量化に寄与することとな
る。
Therefore, according to the present embodiment, as in the above-described embodiments, the conventional drawback that the radiation sound is generated due to the resonance of the shell 1 due to the exhaust pulsation can be solved, and the deterioration of the withstand voltage performance of the silencer is affected. At the same time, the exhaust gas does not directly hit the shell 1 so that the heat transfer to the shell 1 is reduced and the thermal deformation of the shell 1 is reduced, and furthermore, the porous pipe 43 installed between the baffle plates 7 and 9 is reinforced. Along with the fact that it functions as a material and increases the rigidity of the silencer, the shell 1 can be made thinner, which contributes to weight reduction of the silencer.

【0047】然も、上述したように本実施例によって
も、消音器内に流入した排気ガスの多くが多孔パイプ4
3の小孔47を通過する際に整流されるので、従来に比
し気流音の発生を軽減できる効果を有する。
Of course, as described above, also in this embodiment, most of the exhaust gas flowing into the silencer is the porous pipe 4.
Since it is rectified when passing through the small holes 47 of No. 3, it has an effect of reducing the generation of airflow noise as compared with the conventional case.

【0048】尚、上記実施例では、多孔パイプ43をバ
ッフルプレート7側に挿着したが、バッフルプレート9
側に多孔パイプ43を挿着してもよいことは勿論であ
る。
In the above embodiment, the perforated pipe 43 is attached to the baffle plate 7 side, but the baffle plate 9
Of course, the perforated pipe 43 may be attached to the side.

【0049】[0049]

【発明の効果】以上述べたように、各請求項に記載の消
音器によれば、排気脈動によるシェルの共振で輻射音が
発生してしまうことがなくなり、又、消音器の耐圧性能
の悪化影響を軽減できると共に、排気ガスが直接シェル
に当たらないためシェルへの熱伝達が軽減してシェルの
熱変形が軽減されるので、シェルの薄肉化が図れ、消音
器の軽量化に寄与することが可能となる。
As described above, according to the silencer described in each claim, radiation noise is not generated due to resonance of the shell due to exhaust pulsation, and the pressure resistance of the silencer is deteriorated. In addition to being able to reduce the effect, the exhaust gas does not directly hit the shell, so heat transfer to the shell is reduced and thermal deformation of the shell is reduced.Thus, the shell can be made thinner, contributing to the weight reduction of the silencer. Is possible.

【0050】そして、請求項2及び請求項3に係る消音
器にあっては、バッフルプレート間に架設した発泡金属
パイプが補強材として消音器の剛性を高めるので、シェ
ルの薄肉化がより確実に図れ、消音器の軽量化が更に可
能となる。
In the silencer according to the second and third aspects, since the foam metal pipe installed between the baffle plates increases the rigidity of the silencer as a reinforcing material, the thickness of the shell can be reduced more reliably. Further, the weight of the silencer can be further reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】請求項1及び請求項2に係る消音器の第一実施
例の断面図である。
FIG. 1 is a sectional view of a first embodiment of a silencer according to claims 1 and 2.

【図2】発泡金属パイプの側面図である。FIG. 2 is a side view of a foam metal pipe.

【図3】図2のA方向矢視図である。FIG. 3 is a view on arrow A in FIG.

【図4】図1のIV−IV線断面図である。4 is a sectional view taken along line IV-IV in FIG.

【図5】図1のV−V線断面図である。5 is a sectional view taken along line VV of FIG.

【図6】請求項1及び請求項2に係る消音器の第二実施
例の要部拡大断面図である。
FIG. 6 is an enlarged sectional view of an essential part of a second embodiment of the silencer according to claims 1 and 2.

【図7】請求項1及び請求項3に係る消音器の第一実施
例の要部拡大断面図である。
FIG. 7 is an enlarged sectional view of an essential part of a muffler according to a first embodiment of the present invention.

【図8】図7のVIII−VIII線断面図である。8 is a sectional view taken along line VIII-VIII of FIG.

【図9】請求項1及び請求項3に係る消音器の第二実施
例の要部断面図である。
FIG. 9 is a cross-sectional view of essential parts of a second embodiment of a silencer according to claims 1 and 3.

【図10】請求項1及び請求項3に係る消音器の第三実
施例の要部断面図である。
FIG. 10 is a cross-sectional view of essential parts of a third embodiment of a silencer according to claims 1 and 3.

【図11】請求項1及び請求項3に係る消音器の第四実
施例の要部断面図である。
FIG. 11 is a cross-sectional view of the essential parts of a fourth embodiment of a silencer according to Claims 1 and 3.

【図12】請求項4に係る消音器の一実施例の要部拡大
断面図である。
FIG. 12 is an enlarged sectional view of an essential part of an embodiment of a silencer according to claim 4;

【図13】従来の消音器の断面図である。FIG. 13 is a sectional view of a conventional silencer.

【図14】従来の消音器の内部構造の斜視図である。FIG. 14 is a perspective view of the internal structure of a conventional silencer.

【符号の説明】[Explanation of symbols]

1 シェル 3,5 エンドプレート 7,9 バッフルプレート 7a,9a 切欠き 11 第1室 13 第2室 15 第3室 17 排気導入管 19 排気導出管 21 共鳴管 23 連通管 25,27,33 発泡金属パイプ 25a,27a 突片 35,37,39,41 突出部 43 多孔パイプ 47 小孔 DESCRIPTION OF SYMBOLS 1 Shell 3,5 End plate 7,9 Baffle plate 7a, 9a Notch 11 1st chamber 13 2nd chamber 15 3rd chamber 17 Exhaust gas inlet pipe 19 Exhaust gas outlet pipe 21 Resonance pipe 23 Communication pipe 25, 27, 33 Foam metal Pipe 25a, 27a Projection piece 35, 37, 39, 41 Projection part 43 Perforated pipe 47 Small hole

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 両端開口をエンドプレート(3,5)で
閉塞したシェル(1)内を複数のバッフルプレート
(7,9)で仕切って、排気導入管(17)の挿入側端
部(17a)が開口する室(13)を拡張室とした消音
器に於て、上記排気導入管(17)の挿入側端部(17
a)を、排気導入管(17)よりも大径に成形され、且
つ多数の連続気孔体からなる発泡金属パイプ(25,3
3)で覆ったことを特徴とする消音器。
1. An end portion (17a) on the insertion side of an exhaust gas introduction pipe (17), wherein a shell (1) whose both openings are closed by end plates (3, 5) is partitioned by a plurality of baffle plates (7, 9). ) Has a chamber (13) opened as an expansion chamber, the silencer has an insertion side end (17) of the exhaust introduction pipe (17).
a) is a metal foam pipe (25, 3) having a diameter larger than that of the exhaust introduction pipe (17) and including a large number of continuous pores.
A silencer characterized by being covered in 3).
【請求項2】 発泡金属パイプ(25)は、拡張室を区
画形成する2つのバッフルプレート(7,9)間に架設
され、両バッフルプレート(7,9)には、複数の切欠
き(7a,9a)が同一円周上に対向して設けられると
共に、発泡金属パイプ(25)の両端部には、当該各切
欠き(7a,9a)に係合可能な複数の突片(25a)
が形成されていることを特徴とする請求項1記載の消音
器。
2. A metal foam pipe (25) is installed between two baffle plates (7, 9) that define an expansion chamber, and both baffle plates (7, 9) have a plurality of notches (7a). , 9a) are provided so as to face each other on the same circumference, and a plurality of projecting pieces (25a) engageable with the notches (7a, 9a) are provided at both ends of the foam metal pipe (25).
The silencer according to claim 1, wherein the silencer is formed.
【請求項3】 発泡金属パイプ(33)は、拡張室を区
画形成する2つのバッフルプレート(7,9)又はバッ
フルプレート(7,9)とエンドプレート(3,5)間
に架設され、両バッフルプレート(7,9)又はバッフ
ルプレート(7,9)とエンドプレート(3,5)に
は、発泡金属パイプ(33)の両端部を支持する突出部
(35,37,41,43)が、拡張室側へ同一円周上
に対向して突設されていることを特徴とする請求項1記
載の消音器。
3. A foam metal pipe (33) is installed between two baffle plates (7, 9) or baffle plates (7, 9) and an end plate (3, 5) that define an expansion chamber. The baffle plate (7, 9) or the baffle plate (7, 9) and the end plate (3, 5) have protrusions (35, 37, 41, 43) for supporting both ends of the metal foam pipe (33). The muffler according to claim 1, wherein the muffler is provided so as to project toward the expansion chamber on the same circumference.
【請求項4】 両端開口をエンドプレート(3,5)で
閉塞したシェル(1)内を複数のバッフルプレート
(7,9)で仕切って、排気導入管(17)の挿入側端
部(17a)が開口する室(13)を拡張室とした消音
器に於て、上記排気導入管(17)の挿入側端部(17
a)を、排気導入管(17)よりも大径に成形され、且
つ周壁に多数の小孔を有する開口率100%以上の多孔
パイプ(43)で覆ったことを特徴とする消音器。
4. An end portion (17a) on the insertion side of an exhaust gas introduction pipe (17) is formed by partitioning the inside of a shell (1) whose both openings are closed by end plates (3, 5) with a plurality of baffle plates (7, 9). ) Has a chamber (13) opened as an expansion chamber, the silencer has an insertion side end (17) of the exhaust introduction pipe (17).
A silencer characterized in that a) is covered with a perforated pipe (43) having a diameter larger than that of the exhaust introduction pipe (17) and having a large number of small holes in the peripheral wall and an opening ratio of 100% or more.
JP16124294A 1993-07-13 1994-07-13 Silencer Pending JPH0777025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16124294A JPH0777025A (en) 1993-07-13 1994-07-13 Silencer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5-38344 1993-07-13
JP3834493 1993-07-13
JP16124294A JPH0777025A (en) 1993-07-13 1994-07-13 Silencer

Publications (1)

Publication Number Publication Date
JPH0777025A true JPH0777025A (en) 1995-03-20

Family

ID=26377574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16124294A Pending JPH0777025A (en) 1993-07-13 1994-07-13 Silencer

Country Status (1)

Country Link
JP (1) JPH0777025A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802824B1 (en) * 2006-08-14 2008-02-12 현대자동차주식회사 A muffler baffle
KR100804150B1 (en) * 2006-12-18 2008-02-19 코리아 니켈 주식회사 Muffler comprised complex function
KR100946493B1 (en) * 2007-11-13 2010-03-10 기아자동차주식회사 Muffler for vehicle
KR100957147B1 (en) * 2007-12-07 2010-05-11 현대자동차주식회사 Muffler of vehicle and exhaust apparatus using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802824B1 (en) * 2006-08-14 2008-02-12 현대자동차주식회사 A muffler baffle
KR100804150B1 (en) * 2006-12-18 2008-02-19 코리아 니켈 주식회사 Muffler comprised complex function
KR100946493B1 (en) * 2007-11-13 2010-03-10 기아자동차주식회사 Muffler for vehicle
KR100957147B1 (en) * 2007-12-07 2010-05-11 현대자동차주식회사 Muffler of vehicle and exhaust apparatus using the same

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