JPS60216016A - Muffler device in internal-combustion engine - Google Patents
Muffler device in internal-combustion engineInfo
- Publication number
- JPS60216016A JPS60216016A JP7232984A JP7232984A JPS60216016A JP S60216016 A JPS60216016 A JP S60216016A JP 7232984 A JP7232984 A JP 7232984A JP 7232984 A JP7232984 A JP 7232984A JP S60216016 A JPS60216016 A JP S60216016A
- Authority
- JP
- Japan
- Prior art keywords
- expansion chamber
- exhaust
- exhaust gas
- outlet pipe
- expansion
- 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.)
- Granted
Links
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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、内燃機関の排気消音装置の改良に関する。[Detailed description of the invention] Industrial applications The present invention relates to an improvement in an exhaust silencer for an internal combustion engine.
従来技術
例えば自動車に用いられている排気消音装置としては糧
々の形態のものがあり、その一種として第１図を示すよ
うなものが知られている（例えば実開昭５７−２００６
１１号公報）。BACKGROUND ART For example, there are various types of exhaust muffling devices used in automobiles, one of which is shown in Fig. 1 (for example, the one shown in Fig.
Publication No. 11).
これはマフラ外筒１の両端部が端板２，３で閉塞されて
いると共に、該マフラ外筒１の内部に仕切板４を介して
第１拡張室５と第２拡張室６が形成されておシ、上目ピ
第１拡張室５を貫通する排気入口管７から流入した排気
が、矢印で示すように第２拡張室６を通過して上記仕切
板４に設けられた連通′ｒ！！８を経て第１拡張室５に
Ｕター７シ、該第１拡張室５から再びＵターンして帛２
拡張室６を貫通した排気出口管９を経て車外へ排出され
る構成となっている。This is because both ends of the muffler outer cylinder 1 are closed with end plates 2 and 3, and a first expansion chamber 5 and a second expansion chamber 6 are formed inside the muffler outer cylinder 1 with a partition plate 4 in between. Then, the exhaust gas flowing from the exhaust inlet pipe 7 passing through the first expansion chamber 5 passes through the second expansion chamber 6 as shown by the arrow and connects to the communication 'r provided in the partition plate 4. ! ! 8 to the first expansion chamber 5, then make a U-turn again from the first expansion chamber 5 and move to the first expansion chamber 5.
The exhaust gas is discharged outside the vehicle through an exhaust outlet pipe 9 passing through the expansion chamber 6.
このような排気消音装置は、２段Ｕターン構造とするこ
とにより幅広い周波数領域での消音効果を発揮でき、と
りわけ機関低回転域における排気脈動の基本次数成分に
対する消音効果に優れている。Such an exhaust silencing device has a two-stage U-turn structure, so that it can exhibit a silencing effect in a wide frequency range, and is particularly effective in silencing fundamental order components of exhaust pulsation in a low engine speed range.
しかしながら、このような従来の排気消音装置にあって
は、構造が複雑であるため、排気流の渦や乱れが生じや
すく特に機関高回転大排気流電時にマフラ外筒１内で高
周波数の気流音が発生し、排気騒音が大きくなるという
問題がある。しかも、高回転大排気流量時に排圧が大き
くな夛、機関の出力が低下するといった問題をも有して
いる。However, since such a conventional exhaust silencer has a complicated structure, it is easy to cause vortices and turbulence in the exhaust flow, especially when high-frequency engine rotation and large exhaust current flow occur. There is a problem that noise is generated and exhaust noise becomes louder. Furthermore, there are also problems in that the exhaust pressure is large and the output of the engine is reduced when the engine speed is high and the exhaust flow rate is large.
本発明の目的
この発明は、上記従来の各問題点に鑑み提案されたもの
で、機関小排気流量時における排気脈動騒音等の低下を
図ると共に、大排気流量時における排気騒音の低下と、
排圧低下による出方向上を図９得る内燃機関の排気消音
装置の提供を目的とする。OBJECTS OF THE INVENTION The present invention was proposed in view of the above-mentioned conventional problems, and aims to reduce exhaust pulsation noise etc. when the engine exhaust flow rate is small, as well as reduce exhaust noise when the engine exhaust flow rate is large.
It is an object of the present invention to provide an exhaust silencing device for an internal combustion engine that obtains the exhaust noise in the exhaust direction due to a decrease in exhaust pressure.
本発明の構成
この発明は、マフラ外筒の内部に形成される第１・第２
拡張室と、該第１拡張室を貫通すると共に一端が機関に
接続され他端が上記第２拡張室に開口する排気入口管と
、上記第１拡張室を貫通すると共に一端が上記＠２拡張
室に開口し、かつ第１拡張室に臨む部位に連通孔が形成
された第１排気出口管と、上記第２拡張室を貫通すると
共に一端が第１拡張室に開口し他端が上記第１排気出口
管に合流接続される第２排気出口管と、上記第１排気出
口管の途中に形成でれ、機関の回転に応じて第１排気出
口管の通路を開閉弁とを備えるものである。Structure of the present invention The present invention provides first and second
an expansion chamber; an exhaust inlet pipe that passes through the first expansion chamber and has one end connected to the engine and the other end opening into the second expansion chamber; and an exhaust inlet pipe that passes through the first expansion chamber and has one end connected to the second expansion chamber a first exhaust outlet pipe that opens into the chamber and has a communication hole formed in a portion facing the first expansion chamber; The second exhaust outlet pipe is connected to the first exhaust outlet pipe, and the second exhaust outlet pipe is formed in the middle of the first exhaust outlet pipe to open and close the passage of the first exhaust outlet pipe in accordance with the rotation of the engine. be.
実施例 以下、この発明の一実施例を図面に基づいて詳述する。Example Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
第２図はこの発明に係る排気消音装置を示す断面図であ
って、図中１１は断面楕円状のマフラ外筒１２及び１３
Ｌマフう外筒１１を閉基する前後端板、 １４はマフラ
外筒１１内に設けられ＃＄１拡張室１ｂ、！： ｍ ２
拡張室１６とを隔絶する仕切板、１７は上記前端板１２
と仕切板１４を介して第１拡張室１５を貫通すると共に
、一端１７ ａが図外の機関に接続され、かつ他端１７
ｂが上記第２拡張室１６に開口する排気入口管、１８
は前端板１２と仕切板１４を介して第１拡張室１ｂを貫
通ずると共に、一端１８ ａが第２拡張室１６に開口し
、かつ他端１８′ｂが前端板１２を貫通して、マフラ外
部に開口し、前記第１拡張室１５に臨む部位に複数の連
通孔１９を有する第１排気出口管である。該第１排気出
口管１８ ｉは、同図に示すようにＵ字状に折曲されて
一定長場を確保しているＵ字型排気管２２の一端２２
ａに嵌合している。FIG. 2 is a sectional view showing the exhaust silencer according to the present invention, in which reference numeral 11 indicates muffler outer cylinders 12 and 13 having an elliptical cross section.
The front and rear end plates 14, which close the L muffle outer cylinder 11, are provided in the muffler outer cylinder 11, and #$1 expansion chamber 1b,! : m2
A partition plate 17 separates the expansion chamber 16 from the front end plate 12.
and the first expansion chamber 15 through the partition plate 14, and one end 17a is connected to an engine (not shown), and the other end 17a is connected to an engine (not shown).
b is an exhaust inlet pipe 18 that opens into the second expansion chamber 16;
passes through the first expansion chamber 1b via the front end plate 12 and the partition plate 14, one end 18a opens into the second expansion chamber 16, and the other end 18'b passes through the front end plate 12, and the muffler This is a first exhaust outlet pipe that opens to the outside and has a plurality of communication holes 19 at a portion facing the first expansion chamber 15 . As shown in the figure, the first exhaust outlet pipe 18i is one end 22 of a U-shaped exhaust pipe 22 that is bent into a U-shape to ensure a constant length.
It is fitted in a.
また、図中２０祉仕切板１４と後端板１３を介して第２
拡張室１６を貫通すると共に、一端２０ ａが第１拡張
室１ｂに開口し、かつ他端２０ ｂが７７う外部に開口
する第２排気出口管である。、２１は、Ｙ字形状の合流
管でＹ字端部の一端２１ａが第２排気出口管２０の他端
２０ ｂに妖合し、Ｙ字端部の他端２１ ｂが、前記Ｕ
牢屋排気管２２の他端２２ ｂに嵌合している。つまり
、合流管２１ 線、第２排気出口管加とＵ字型排気管２
２からの排気が滑らかに合流するように形成されている
。In addition, a second
This is a second exhaust outlet pipe that penetrates the expansion chamber 16, has one end 20a open to the first expansion chamber 1b, and the other end 20b 77 to open to the outside. , 21 is a Y-shaped merging pipe, one end 21a of the Y-shaped end is connected to the other end 20b of the second exhaust outlet pipe 20, and the other end 21b of the Y-shaped end is connected to the U
It fits into the other end 22b of the prison exhaust pipe 22. In other words, the merging pipe 21 line, the second exhaust outlet pipe addition and the U-shaped exhaust pipe 2
It is formed so that the exhaust air from 2 flows together smoothly.
また、上記第１排気出口管１８の途中すなわちマフラ外
筒１１の前端板１２外側付近に該第１排気出口管１８の
通路を開閉する開閉弁３０が配設されている。Further, an on-off valve 30 for opening and closing the passage of the first exhaust outlet pipe 18 is disposed in the middle of the first exhaust outlet pipe 18, that is, near the outside of the front end plate 12 of the muffler outer cylinder 11.
この開閉ｆｆ３りは、同図に示すように通路内に設けら
れるバタフライ型の弁体３１と、駆動軸３２及び回転ア
ーム３３を介して該弁体３１に連結されたソレノイド３
４とからなシ、制御回路３５より機関の回転範囲に応じ
て開閉制御されている。As shown in the same figure, this opening/closing ff3 is controlled by a butterfly-type valve body 31 provided in the passage, and a solenoid 3 connected to the valve body 31 via a drive shaft 32 and a rotating arm 33.
Opening and closing are controlled by a control circuit 35 according to the rotation range of the engine.
以上の構成によれば、機関低回転域（例え、ば４００Ｏ
ｒ−ｐ−ｍ 以下）の場合は、第２図に示すようにそれ
を検知した制御回路３５によってソレノイド３４がＯｆ
”Ｆとなシ弁体３１を閉状態にしている。According to the above configuration, the engine speed range (for example, 400O
r-p-m or less), the control circuit 35 detects this and turns the solenoid 34 off as shown in FIG.
"F" and the valve body 31 is in the closed state.
このため、排気入口管１７から第２拡張室１６へ流入し
た排気が同図矢印で示すように第２拡張室１６から第１
排気出口管１８内へＵターンし、該第１排気出口管１８
の連通孔１９を通って第１拡張室１５へ流入し、そこで
再びＵターンして第２排気出口管２０に流入してそのま
ま合流管２１に入って車外へ排出される。即ち、排気が
このような２重Ｕターン構造拡張型消音部を流通するこ
とによシ、幅広い周波数領域での消音効果が発揮きれ、
機関低回転域に発生する排気脈動騒音も十分に低減され
る。Therefore, the exhaust gas flowing into the second expansion chamber 16 from the exhaust inlet pipe 17 flows from the second expansion chamber 16 to the first expansion chamber 16 as shown by the arrow in the figure.
Make a U-turn into the exhaust outlet pipe 18 and open the first exhaust outlet pipe 18.
The exhaust gas flows into the first expansion chamber 15 through the communication hole 19, then makes a U-turn again, flows into the second exhaust outlet pipe 20, enters the confluence pipe 21, and is discharged outside the vehicle. In other words, by allowing the exhaust gas to flow through such a double U-turn structure expanded silencing section, the silencing effect can be achieved over a wide range of frequencies.
Exhaust pulsation noise that occurs in the low engine speed range is also sufficiently reduced.
一方、機関高回転域（例えば４０００ｒ−ｐ−ｍ以上）
の場合は、第３図に示すように制御回路３５によってソ
レノイド３４がＯＮとなって弁体３１を閉状態にする。On the other hand, engine high rotation range (e.g. 4000 rpm or more)
In this case, the control circuit 35 turns on the solenoid 34 to close the valve body 31, as shown in FIG.
このため、排気入口管１７から＠２拡張室１６へ流入し
た排気が同図矢印で示すように第２拡張室１６から第１
排気出口管１８内へＵターンし、そのまま合流管２１に
入って車外へ排出される。即ち、排気が一段Ｕターン栴
造拡張型消音部と多孔拡張型消音部を通過するため、２
段Ｕターン構造拡張型消音部と比べて排気流通路が簡潔
になるので機関高回転域における排圧の増大が回避され
機関出力の低下が防止されると共に、２次発生気流音が
抑制される。しかも、排気の主流が連通孔１９を通過す
る際生菌周波数域の排気騒音をも十分低減される。Therefore, the exhaust gas flowing into the @2 expansion chamber 16 from the exhaust inlet pipe 17 flows from the second expansion chamber 16 to the first expansion chamber 16 as shown by the arrow in the figure.
It makes a U-turn into the exhaust outlet pipe 18, enters the confluence pipe 21, and is discharged outside the vehicle. That is, since the exhaust gas passes through the U-turn SEIZO expansion type noise reduction part and the porous expansion type noise reduction part,
Compared to the staged U-turn structure expansion type silencer, the exhaust flow path is simpler, thereby avoiding an increase in exhaust pressure in the engine's high rotation range, preventing a decrease in engine output, and suppressing secondary airflow noise. . Moreover, when the main stream of exhaust gas passes through the communication hole 19, the exhaust noise in the viable bacteria frequency range is also sufficiently reduced.
更に、２棟類の排気流通経路をマフラ外筒１１に１つに
まとめられるので装置全体のコンパクト化が図れる。Furthermore, since the exhaust flow paths of the two buildings can be integrated into one muffler outer cylinder 11, the entire apparatus can be made more compact.
本発明の効果
以上のように本発明に係る内燃機関の排気消音装置は、
機関の回転に応じて排気の流通経路を切換え、排気流量
が少ない場合は、２段Ｕターン構造拡張型消音部を構成
するので、幅広い周波数領域での消音効果と排気脈動騒
音に対する消音効果を十分に発揮する。一方、排気流量
の多い場合は、一段Ｕターン構造拡張型消音部と多孔拡
張型消音部をＳ成するので排気通路が簡潔となシ排圧の
低下と、機関の出方向上が図れると共に、２次発生気流
音が抑制され、しかも中高周波数領域の排気線量を十分
に低減することができる。史に、２つの拡張室で、２段
Ｕターン構造拡張型消音部を構成したシ、一段Ｕターン
構造拡張型消音部と多孔拡張型消音部を構成したシする
ことができるので、排気消音装置を小型にすることがで
きる。Effects of the present invention As described above, the exhaust silencing device for an internal combustion engine according to the present invention has
The exhaust flow path is switched according to the rotation of the engine, and when the exhaust flow rate is low, a two-stage U-turn structure expansion type muffling section is configured, so it has a sufficient muffling effect in a wide frequency range and exhaust pulsation noise. Demonstrate. On the other hand, when the exhaust flow rate is large, the single-stage U-turn structure expansion type noise reduction part and the multi-hole expansion type noise reduction part are formed into an S configuration, so the exhaust passage is simple, the exhaust pressure can be lowered, and the engine output direction can be increased. Secondary airflow noise is suppressed, and the exhaust radiation dose in the medium and high frequency ranges can be sufficiently reduced. Historically, two expansion chambers can be used to configure a two-stage U-turn structure expansion type muffling section, a single-stage U-turn structure expansion type muffling section, and a multi-hole expansion type muffling section. can be made smaller.
第１図は従来の内燃機関の排気消音装置を示す断面図、
第２図は本発明の排気消音装置を示す断面図、第３図は
同排気消音装置の開閉弁が開いた状態を示す断面図であ
る。
１１・・・マフラ外筒、ｌｂ・・・第１拡張室、 １６
・・・第２拡張室、１７０・排気入口管、１８・Φ・第
１排気出口管、１９・０連通孔、２υ・・・第２排気出
口管、胎・・・開閉弁。
外２名
第１図FIG. 1 is a sectional view showing a conventional exhaust silencer for an internal combustion engine.
FIG. 2 is a sectional view showing the exhaust silencing device of the present invention, and FIG. 3 is a sectional view showing the exhaust silencing device in a state where the on-off valve is open. 11...Muffler outer cylinder, lb...First expansion chamber, 16
...Second expansion chamber, 170, exhaust inlet pipe, 18, Φ, first exhaust outlet pipe, 19, 0 communication hole, 2υ, second exhaust outlet pipe, holder...opening/closing valve. 2 people outside Figure 1
Claims (1)
室と、該第１拡張室を貫通すると共に一端が機関に接続
され他端が上記第２拡張室に開口する排気人口管と、上
記第１拡張室をＸ通すると共に一端が上記第２拡張室に
開口し、かつ第１拡張室に臨む部位に連通孔が形成され
た第１排気出口管と、上記第２拡張室を貫通すると共に
一端が＃！ｌ拡張室に開口し他端が上記第１排気出口管
に合流接続される第２排気出口管と、上記第１＃ＩＩ気
出口管の途中に形成場れ機関の回転に応じて第１排気出
口管の通路を紬閉する開閉弁とを備えたことを特徴とす
る内燃機関の排気消音装置。(1) First and second expansion chambers formed inside the muffler outer cylinder, and an exhaust manifold that passes through the first expansion chamber, has one end connected to the engine, and the other end opens into the second expansion chamber. a first exhaust outlet pipe that passes through the first expansion chamber, has one end open to the second expansion chamber, and has a communication hole formed in a portion facing the first expansion chamber; and the second expansion chamber. It penetrates and one end is #! A second exhaust outlet pipe that opens into the expansion chamber and whose other end is connected to the first exhaust outlet pipe, and a second exhaust outlet pipe that is formed in the middle of the first An exhaust muffling device for an internal combustion engine, comprising an on-off valve that closes a passage of an outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7232984A JPS60216016A (en) | 1984-04-11 | 1984-04-11 | Muffler device in internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7232984A JPS60216016A (en) | 1984-04-11 | 1984-04-11 | Muffler device in internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60216016A true JPS60216016A (en) | 1985-10-29 |
| JPH0156247B2 JPH0156247B2 (en) | 1989-11-29 |
Family
ID=13486135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7232984A Granted JPS60216016A (en) | 1984-04-11 | 1984-04-11 | Muffler device in internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60216016A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0328056A2 (en) * | 1988-02-08 | 1989-08-16 | Sango Co., Ltd. | Muffler |
| EP0329165A2 (en) * | 1988-02-18 | 1989-08-23 | Mazda Motor Corporation | Engine-control apparatus |
| JPH023009U (en) * | 1988-06-20 | 1990-01-10 | ||
| EP0902171A3 (en) * | 1997-09-12 | 2002-12-04 | Sango Co., Ltd. | Muffler |
| JP2006342679A (en) * | 2005-06-07 | 2006-12-21 | Calsonic Kansei Corp | Exhaust pipe fixing structure in vehicular muffler |
| CN103270262A (en) * | 2010-11-29 | 2013-08-28 | 田纳科汽车营运公司 | Snap-action valve for exhaust system |
| US11319848B2 (en) * | 2018-10-18 | 2022-05-03 | Hyundai Motor Company | Variable valve for muffler and dual muffler having the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0578238U (en) * | 1992-04-01 | 1993-10-26 | 嵜山 政雄 | Baby bottle with forward and reverse scale |
-
1984
- 1984-04-11 JP JP7232984A patent/JPS60216016A/en active Granted
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0328056A2 (en) * | 1988-02-08 | 1989-08-16 | Sango Co., Ltd. | Muffler |
| EP0329165A2 (en) * | 1988-02-18 | 1989-08-23 | Mazda Motor Corporation | Engine-control apparatus |
| JPH023009U (en) * | 1988-06-20 | 1990-01-10 | ||
| JPH0515526Y2 (en) * | 1988-06-20 | 1993-04-23 | ||
| EP0902171A3 (en) * | 1997-09-12 | 2002-12-04 | Sango Co., Ltd. | Muffler |
| JP2006342679A (en) * | 2005-06-07 | 2006-12-21 | Calsonic Kansei Corp | Exhaust pipe fixing structure in vehicular muffler |
| JP4508951B2 (en) * | 2005-06-07 | 2010-07-21 | カルソニックカンセイ株式会社 | Fixing structure of exhaust pipe in silencer for vehicle |
| CN103270262A (en) * | 2010-11-29 | 2013-08-28 | 田纳科汽车营运公司 | Snap-action valve for exhaust system |
| CN103270262B (en) * | 2010-11-29 | 2016-10-19 | 田纳科汽车营运公司 | Snap-action valve for gas extraction system |
| US11319848B2 (en) * | 2018-10-18 | 2022-05-03 | Hyundai Motor Company | Variable valve for muffler and dual muffler having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0156247B2 (en) | 1989-11-29 |
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