JPS6067715A - Coupling construction for exhaust pipes - Google Patents
Coupling construction for exhaust pipesInfo
- Publication number
- JPS6067715A JPS6067715A JP58175657A JP17565783A JPS6067715A JP S6067715 A JPS6067715 A JP S6067715A JP 58175657 A JP58175657 A JP 58175657A JP 17565783 A JP17565783 A JP 17565783A JP S6067715 A JPS6067715 A JP S6067715A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- pipe
- upstream
- downstream
- partition plate
- 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
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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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】
この発明は内燃機関の排気装置に於ける排気管の接続構
造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust pipe connection structure in an exhaust system for an internal combustion engine.
内燃機関の排気装置は、シリンダで生じた排気ガスを外
部に排出する様になっており１例えば第１図に示す様に
、排気多岐管ｌと、２本の上流側排気管λ、３と、１本
の下流側排気管５と、これらの両排気管２．３と５と全
結合したＹ字状の合流管ｌと、第１の７７プイと、第２
の７７２７と、両マフラ６．７を接続する連通管ざと１
尾管９とを接続したものからなる。（日量自動車（株）
発行昭和５７年１０月サービス周報第４７５号ニッサン
スカイライン参照のこと）
また、上記排気管１，３および排気管Ｓと合流管弘との
結合構造は第２図、第８図および第４図に示す様になっ
ている。すなわち、上流側排気管λ、３は各一端がＹ字
状の合流９４ｔの分岐部＜ｚａ。The exhaust system of an internal combustion engine is designed to exhaust the exhaust gas generated in the cylinder to the outside.1 For example, as shown in Fig. 1, an exhaust manifold l, two upstream exhaust pipes λ, 3, , one downstream exhaust pipe 5, a Y-shaped merging pipe l fully connected to both of these exhaust pipes 2.3 and 5, a first 77 pui, and a second
7727 and the communication pipe 1 that connects both mufflers 6.7
It consists of a tail tube 9 connected to it. (Nippon Jidosha Co., Ltd.)
(Refer to Nissan Skyline, Service Bulletin No. 475, issued in October 1981.) Also, the connection structure between the exhaust pipes 1 and 3 and the exhaust pipe S and the merging pipe are shown in Figures 2, 8, and 4. It is as shown. That is, each end of the upstream exhaust pipe λ, 3 is a Y-shaped junction 94t branch <za.
≠ｂ内にその内壁に沿って挿入され、その挿入部で排気
ｖ２，３外壁と合流管Ｖの内壁とが互いに接する構造に
なっている。また１合流管ｌの合流部ＶＣ内には下流側
排気管Ｓの一端が接する様に挿入固定されている。≠b is inserted along its inner wall, and the outer wall of the exhaust gas v2, 3 and the inner wall of the merging pipe V are in contact with each other at the insertion portion. Further, one end of the downstream exhaust pipe S is inserted and fixed into the merging portion VC of the 1 merging pipe 1 so as to be in contact with it.
しかしながら、上記構造になる排気管の接続構造にあっ
ては、各上流側排気管λ、３がらの排気が合流管弘に於
いて互いに干渉し、この合流管弘に於ける排気圧力波が
下流側排気管Ｓに流出しにくくなっていた。このため、
合流管弘に於ける排気圧力波の一部が排気管λ、３を経
て上流に伝播し、その上流部で他の排気圧力波と干渉す
ることにより、排気衝撃波を発生し、排気騒音を顕著に
していた。また、上流に伝播する排気圧力波によって、
排気効率の低下、出方の低下を招くという問題があった
。However, in the above-mentioned exhaust pipe connection structure, the exhaust from the three upstream exhaust pipes interferes with each other at the merging pipe, and the exhaust pressure waves at the merging pipe are transmitted to the downstream. It became difficult for the gas to flow out into the side exhaust pipe S. For this reason,
A part of the exhaust pressure wave in the confluence pipe propagates upstream through the exhaust pipe λ, 3, and interferes with other exhaust pressure waves in the upstream part, generating an exhaust shock wave and causing noticeable exhaust noise. I was doing it. In addition, due to the exhaust pressure wave propagating upstream,
There was a problem that this resulted in a decrease in exhaust efficiency and a decrease in the way the exhaust was discharged.
この発明はかかる従来の問題点に着目してなされたもの
で、合流管に於ける排気圧力波が、上流側排気管を経て
上流に伝播するのを抑制し、排気圧力波相互の干渉によ
る排気騒音の発生を防止する排気管の接続構造全提供す
ること全目的とする。This invention was made in view of such conventional problems, and suppresses the exhaust pressure waves in the merging pipe from propagating upstream through the upstream exhaust pipe, and prevents the exhaust pressure waves from propagating upstream due to mutual interference between the exhaust pressure waves. The overall purpose is to provide a complete exhaust pipe connection structure that prevents the generation of noise.
そしてこの目的達成のため、２本の上流１＃ｌｌｌ排気
管と１本の下流＊Ｊ ＵＰ気管とを、Ｙ字状の合流管を
介して接続した排気管の接続構造に於いて、上記各上流
側排気管からの排気を滑かに合流させながら上記下流排
気管に導出する仕切板金、上目己合流先
管の内壁に一定に且つて設けた構成としたのである。In order to achieve this objective, in the exhaust pipe connection structure in which two upstream 1#lll exhaust pipes and one downstream *JUP trachea are connected via a Y-shaped confluence pipe, each of the above-mentioned The partition plate for smoothly merging the exhaust gas from the upstream exhaust pipe and leading it to the downstream exhaust pipe is provided at a constant distance on the inner wall of the merging destination pipe.
以下に、この発明の実施例全図面について具体的に説明
する。All drawings of embodiments of the present invention will be explained in detail below.
第５図および第６図はその一実施例を具体的に示し、第
２図乃至第４図に示したものと同一の構成部分には同一
符号を付しである。コ、Ｊは既述の上流側排気管で、こ
れらの上流端は互いに独立した１個あるいは複数個のシ
リンダからの排気流路に結合され、下流端は合流管弘に
挿入結合されている。FIGS. 5 and 6 specifically show one embodiment of the present invention, and the same components as those shown in FIGS. 2 to 4 are designated by the same reference numerals. C and J are the above-mentioned upstream exhaust pipes, the upstream ends of which are connected to the exhaust passages from one or more cylinders independent of each other, and the downstream ends inserted and connected to the merging pipe.
／ｌは上流側排気管コ、３から合流管弘に流入する排気
を滑らかに合流させる仕切板である。この仕切板／／は
合流管弘の内壁に一定長に亘って取り付けられている。/l is a partition plate that smoothly merges the exhaust gas flowing from the upstream exhaust pipe 3 into the merging pipe 3. This partition plate // is attached to the inner wall of the confluence pipe over a certain length.
すなわち、この仕切板／／は上流端が合流管グの上流側
排気管２，３挿入部間の接合部ｐｄに接し、下流端が合
流部’ＩＱの途中に達して、垂直に起立しておシ、各上
流側排気管２゜３からの排気？１合流部＜ｚｃ付近まで
分離して滑らかにガイドし、仕切板ｌ／下流端後流で合
流する様に作用する。That is, the upstream end of this partition plate // touches the joint pd between the upstream exhaust pipes 2 and 3 insertion parts of the merging pipe group, and the downstream end reaches the middle of the merging part 'IQ, and stands vertically. Exhaust from each upstream exhaust pipe 2゜3? 1. It separates and guides smoothly up to the vicinity of the merging part <zc, and acts to merge at the downstream end of the partition plate l/downstream end.
次に、作用について説明する。Next, the effect will be explained.
シリンダからの排気圧力波は、上流側排気管２゜３を経
て合流管≠に伝播する。合流管Ｖに伝播した排気圧力波
は一部が反射波となって再び上流側排気管−に伝播する
が、上ｒｌ化仕切板／／によって」―記排気圧力波の大
部分が合流室ｌの下流で滑かに合流し、下流側排気管Ｓ
へと伝播し、この結果、上流側排気管コ、３への排気圧
力波の伝播が抑制される。The exhaust pressure wave from the cylinder propagates to the confluence pipe≠ via the upstream exhaust pipe 2°3. Part of the exhaust pressure waves that propagated to the merging pipe V become reflected waves and propagate back to the upstream exhaust pipe.However, due to the upper RL partition plate, most of the exhaust pressure waves are reflected from the merging pipe V. smoothly merge downstream of the exhaust pipe S on the downstream side.
As a result, the propagation of the exhaust pressure wave to the upstream exhaust pipe 3 is suppressed.
従って、その上流側１ノド気管λ、３全上流に伝播する
排気圧力波と、その上流側から下流側に伝播する他の排
気圧力波との干渉が弱められ、この干渉に基づいて生じ
る排気衝撃波による排気騒音を着るしく低減できること
となる。Therefore, the interference between the exhaust pressure wave propagating all upstream of the trachea λ and 3 on the upstream side and other exhaust pressure waves propagating from the upstream side to the downstream side is weakened, and the exhaust shock wave generated based on this interference This makes it possible to comfortably reduce exhaust noise.
第７図はその排気騒音の□底嗜減効果を実験結果に基づ
いて示す音圧レベル特性図である。これは尾管９の吐出
口後方４５°、５Ｑ（１＋ｍの位置で、機関回転数２７
００ｒｐｍとした場合について示したもので、従来品（
第２・図乃至第４図に示したもの）では、曲、ＩＪＰの
様に音圧レベルが高かったのが、この実施例では曲線Ｑ
の様に低くなることが分かる。FIG. 7 is a sound pressure level characteristic diagram showing the bottom reduction effect of the exhaust noise based on experimental results. This is at a position of 45 degrees behind the discharge port of the tail pipe 9, 5Q (1+m), and the engine speed is 27.
The figure shows the case of 00 rpm, and the conventional product (
(shown in Figures 2 to 4), the sound pressure level was high as in the song and IJP, but in this example, the sound pressure level was high on the curve Q.
It can be seen that the value decreases as shown in the figure.
第８図および第９図は他の実施例を示す。この実施例で
は仕切板／２を短くしてアシ、この仕切板／２の上流端
ｌコａと上記接合部≠Ｃの下流端との間に間隙１３を設
けである。FIGS. 8 and 9 show other embodiments. In this embodiment, the partition plate/2 is shortened, and a gap 13 is provided between the upstream end l core a of the partition plate/2 and the downstream end of the joint ≠C.
この実施構造にあっては、上流側排気管λ、３から合流
管ｌに伝播した排気圧力波は、仕切板／２によって、上
記実施例と同様に下流側排気管Ｓに滑らかに伝播してい
き、反射して再び上流側排気管コ、３に伝播するのを抑
制する。また、合流管ｌ内に於ける排気圧力波の上流側
排気管コ、３への伝播は、仕切板／コの下６１ｔおよび
間隙１３を介して行われるが、これら全伝播する２つの
排気圧力波の振幅が小さく１位相が相互に異るため、排
気圧力波相互の干渉が弱められ、排気騒音を更ｅこ抑制
できる。In this implementation structure, the exhaust pressure wave propagated from the upstream exhaust pipe λ, 3 to the merging pipe l is smoothly propagated to the downstream exhaust pipe S by the partition plate /2, as in the above embodiment. This prevents it from being reflected and propagated to the upstream exhaust pipe again. Furthermore, the propagation of the exhaust pressure waves in the merging pipe l to the upstream exhaust pipes 1 and 3 takes place via the lower part of the partition plate 61t and the gap 13, but these two exhaust pressure waves propagate completely. Since the waves have small amplitudes and one phase is different from each other, interference between the exhaust pressure waves is weakened, and exhaust noise can be further suppressed.
なお、排気圧力波の振幅を抑え、位相を異らしめるため
、上記仕切板／／ 、／２の太きさや形状全任意に選択
することができるものである。In addition, in order to suppress the amplitude of the exhaust pressure wave and make the phase different, the thickness and shape of the partition plates // and /2 can be arbitrarily selected.
以上説明してきた様に、この発明によれば、上流側排気
管からの排気を滑らかに合流させる仕切板全合流管内壁
に支持した構成としたことにより、合流管内に於ける排
気圧力波の上流側排気管への伝播が防止され、排気圧力
波相互による干渉を原因として生じる排気騒音を効果的
に抑制できるものである。As explained above, according to the present invention, by supporting the partition plate on the inner wall of the full merging pipe for smoothly merging the exhaust gas from the upstream exhaust pipe, the upstream exhaust pressure wave in the merging pipe is Propagation to the side exhaust pipe is prevented, and exhaust noise caused by interference between exhaust pressure waves can be effectively suppressed.
第１図は従来の排気装置の斜視図、第２図は第１図に於
ける排気管の接続構造を示す一部の拡大斜視図、第３図
は同じく平断面図、第４図は第８図のＡ−Ａ線断面図、
第５図はこの発明の一実施例を示す平断面図、第６図は
第５図のＢ−Ｂ線断面図、第７図は音圧レベル特性図、
第８図は他の実施例の平断面図、第９図は第８図のＣ−
Ｃ線断面図である。
コ、３・・・上流側排気管、弘・・・合流管、Ｓ・・・
下流側排気管、／／、／コ・・・仕切板。
１ｙ）ｚ有Fig. 1 is a perspective view of a conventional exhaust system, Fig. 2 is an enlarged perspective view of a part of the exhaust pipe connection structure shown in Fig. 1, Fig. 3 is a plan sectional view, and Fig. 4 is A sectional view taken along line A-A in Figure 8,
FIG. 5 is a plan sectional view showing an embodiment of the present invention, FIG. 6 is a sectional view taken along the line B-B in FIG. 5, and FIG. 7 is a sound pressure level characteristic diagram.
FIG. 8 is a plan sectional view of another embodiment, and FIG. 9 is a C--C in FIG. 8.
It is a sectional view taken along line C. 3...Upstream exhaust pipe, Hiro...merging pipe, S...
Downstream exhaust pipe, //, /co...partition plate. 1y) Yes
Claims (1)
１排気管と全。 Ｙ字状の合流管全弁して接続した排気管の接続構造に於
いて、上記各上流側排気管からの排気を滑らかに合流さ
せながら上記下流側排気管に導出する仕切板を１上記合
流管の内壁に一定長に亘って設けたこと金特敵とする排
気管の接続構造。[Claims] Two upper (/lt, 0JJJ exhaust pipes and one downstream 111
1 exhaust pipe and all. In the connection structure of the exhaust pipes in which all the valves of the Y-shaped merging pipes are connected, a partition plate is connected to the merging pipe, which smoothly merges the exhaust gas from each of the upstream exhaust pipes and guides it to the downstream exhaust pipe. An exhaust pipe connection structure that is made of a special enemy of metal, which is installed over a certain length on the inner wall of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175657A JPS6067715A (en) | 1983-09-22 | 1983-09-22 | Coupling construction for exhaust pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175657A JPS6067715A (en) | 1983-09-22 | 1983-09-22 | Coupling construction for exhaust pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6067715A true JPS6067715A (en) | 1985-04-18 |
Family
ID=15999928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58175657A Pending JPS6067715A (en) | 1983-09-22 | 1983-09-22 | Coupling construction for exhaust pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6067715A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5747708B2 (en) * | 1976-03-10 | 1982-10-12 |
-
1983
- 1983-09-22 JP JP58175657A patent/JPS6067715A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5747708B2 (en) * | 1976-03-10 | 1982-10-12 |
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