JPH04132826A - Suction/exhaust device for multicylinder engine - Google Patents
Suction/exhaust device for multicylinder engineInfo
- Publication number
- JPH04132826A JPH04132826A JP2253677A JP25367790A JPH04132826A JP H04132826 A JPH04132826 A JP H04132826A JP 2253677 A JP2253677 A JP 2253677A JP 25367790 A JP25367790 A JP 25367790A JP H04132826 A JPH04132826 A JP H04132826A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- branch
- collection chamber
- passage
- passages
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Classifications
-
- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/182—Number of cylinders five
Landscapes
- Exhaust Silencers (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、多気筒エンジンの吸排気装置に係わり、特に
各気筒に接続される複数の分岐通路と、これらの分岐通
路が集合する集合室と、その上流側若しくは下流側の通
路とで構成される多気筒エンジンの吸排気装置に関する
。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an intake and exhaust system for a multi-cylinder engine, and in particular to a plurality of branch passages connected to each cylinder and a collection chamber where these branch passages come together. The present invention relates to an intake/exhaust system for a multi-cylinder engine, which includes a passageway on the upstream side or downstream side thereof.
（従来の技術）
近年、自動車用等のエンジンにおいては、出力性能の向
上のために、慣性効果等の吸気系内における吸気の動的
効果を利用して吸気充填効率を高めようとすることが行
われている。この場合、吸気系統には、エアクリーナか
ら導かれた上流通路が接続されるサージタンク等の集合
部が設けられ、この集合部から分岐された複数の分岐通
路が各気筒にそれぞれ接続される構成となっている。こ
れによれば、上記集合部が、吸気弁の開時に分岐通路の
下流部に発生する負圧波を正圧波に反転させる大気開放
部として作用し、この正圧波が燃焼室に対する過給作用
を行うことにより、吸気充填効率を高めエンジン出力を
向上させている。(Prior Art) In recent years, in order to improve the output performance of automobile engines, attempts have been made to increase the intake air filling efficiency by utilizing dynamic effects of intake air within the intake system, such as inertia effects. It is being done. In this case, the intake system is provided with a collection part such as a surge tank to which the upstream passage led from the air cleaner is connected, and a plurality of branch passages branched from this collection part are connected to each cylinder. It becomes. According to this, the collecting part acts as an atmosphere opening part that reverses the negative pressure wave generated in the downstream part of the branch passage when the intake valve is opened into a positive pressure wave, and this positive pressure wave performs a supercharging effect on the combustion chamber. This increases intake air filling efficiency and improves engine output.
ところで、上記のような集合部として、従来は、その一
端の壁面若しくは周壁面の中央部に上流側通路が接続さ
れ且つ各分岐通路が周壁面に並設されるサージタンクタ
イプが多く用いられている。By the way, conventionally, as the above-mentioned gathering part, a surge tank type is often used, in which an upstream passage is connected to the wall surface of one end or the center of the peripheral wall surface, and each branch passage is arranged in parallel on the peripheral wall surface. There is.
しかし、このような集合部の場合、この集合部内におけ
る上流側通路の接続部から各分岐通路の接続部までの距
離や各分岐通路の長さが相違するため、各気筒への吸気
の分配性あるいは各気筒に対する慣性効果の作用等が不
均一になり、また上流側通路の接続部から各分岐通路の
接続部に至る吸気の流動経路が急激に屈曲することにな
って、吸気の吸入抵抗が増大することになる。However, in the case of such a gathering section, the distance from the connection point of the upstream passage to the connection point of each branch passage in this gathering section and the length of each branch passage are different, so the distribution of intake air to each cylinder is affected. Alternatively, the effect of inertia on each cylinder becomes uneven, and the flow path of intake air from the connection part of the upstream passage to the connection part of each branch passage becomes sharply bent, and the intake resistance of intake air increases. It will increase.
このような問題に対して、例えば実開昭６０＝８８０６
２号には、第４図に示すような吸気装置が開示されてい
る。この吸気装置において、集合部Ａは、略円錐台状と
され、その小径側の端面に開口する上流通路の開口部Ｂ
の中心を通る軸線り一りに関し、大径側の端面に開口す
る各分岐通路Ｃ・・・Ｃの開口部までの距離が略等しく
なっている。For this kind of problem, for example,
No. 2 discloses an intake device as shown in FIG. In this intake device, the gathering part A has a substantially truncated conical shape, and the opening part B of the upstream passage opens at the end face on the small diameter side.
With respect to the axis passing through the center of , the distances to the openings of the branch passages C . . . C opening at the end face on the large diameter side are approximately equal.
このため各気筒への吸気の分配性が均一化されると共に
、吸気の流動経路の急激な屈曲がなくなって吸気抵抗が
低減されることか期待できる。また集合部Ａの下流側の
端面に各分岐通路Ｃ・・・Ｃの上流端が近接して開口し
ているので、慣性効果に関し、各分岐通路Ｃ・・・Ｃが
互いに他の分岐通路Ｃに対する大気開放空間として作用
するため、集合部Ａの容積を小さくすることができる。Therefore, it is expected that the distribution of intake air to each cylinder will be made uniform, and that the intake air flow path will not have a sharp bend, thereby reducing intake resistance. In addition, since the upstream ends of the branch passages C...C open close to the downstream end face of the gathering part A, each branch passage C... Since it acts as a space open to the atmosphere, the volume of the gathering part A can be reduced.
（発明が解決しようとする課題）
しかし、上記のような集合部を用いる場合においても、
各分岐通路の形状特にその曲がり部の曲率が互いに異な
るため、吸気の各分岐通路への均一な分配が困難であり
、この点においてなお改善の余地が残っている。(Problem to be solved by the invention) However, even when using the above-mentioned gathering part,
Since the shapes of the branch passages, particularly the curvatures of their bends, are different from each other, it is difficult to uniformly distribute the intake air to the branch passages, and there is still room for improvement in this respect.
さらに排気装置においても、同様な問題が残っている。Furthermore, similar problems remain in exhaust systems.
そこで本発明は、上記の問題点を解決するためになされ
ものであり、吸気分配性の一層の改善をはかり、吸気充
填効率を高めると共に排気効率を向上させ、エンジン出
力性能を向上させた多気筒エンジンの吸排気装置を提供
することを目的としている。Therefore, the present invention has been made to solve the above-mentioned problems, and aims to further improve intake air distribution, increase intake air filling efficiency, improve exhaust efficiency, and improve engine output performance. Its purpose is to provide intake and exhaust equipment for engines.
（課題を解決するための手段）
上記の目的を達成するために本発明は、複数の気筒のポ
ートにそれぞれの一端が接続された複数の分岐通路と、
これらの分岐通路が束状に集合して接続された集合室と
、この集合室にその一端が接続され上流側若しくは下流
側に延びる通路とを有する多気筒エンジンの吸排気装置
において、各分岐通路の流れ抵抗の大きさに応じて、各
分岐通路と集合室の接続部のオーバーラツプ面積を変化
させるようにしたことを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a plurality of branch passages each having one end connected to a port of a plurality of cylinders;
In an intake/exhaust system for a multi-cylinder engine, which has a collection chamber in which these branch passages are collected and connected in a bundle, and a passage whose one end is connected to the collection chamber and extends to the upstream or downstream side, each branch passage The overlapping area of the connecting portion between each branch passage and the gathering chamber is changed according to the magnitude of flow resistance.
（作用）
上記のように構成した本発明においては、各分岐通路の
流れ抵抗の大きさに応じて、各分岐通路と集合室の接続
部のオーバーラツプ面積を変化させ、曲率の小さい曲が
り部を有する流れ抵抗が大きい分岐通路はど集合室との
接続部のオーバーラツプ面積を太き（とり、曲率の大き
い曲がり部を有する流れ抵抗が小さい分岐通路はど集合
室との接続部のオーバーラツプ面積を小さく取っている
。(Function) In the present invention configured as described above, the overlapping area of the connecting portion between each branch passage and the gathering room is changed according to the magnitude of the flow resistance of each branch passage, and a curved portion with a small curvature is formed. For branch passages with high flow resistance, the overlapping area at the connection with the collecting chamber should be made large (larger), and for branch passages with large curvature and low flow resistance, the overlap area at the connection with the collecting chamber should be made small. ing.
このため、給排気における分配性の改善を図り、排気充
填効率若しくは排気効率を向上させることができる。Therefore, it is possible to improve distribution properties in air supply and exhaust, and improve exhaust filling efficiency or exhaust efficiency.
（実施例）
以下本発明の一実施例について第１図及び第２図を参照
して説明する。第１図は、多気筒エンジンの吸気装置を
示す斜視図である。第１図において、ｌは５気筒エンジ
ンの吸気装置を示し、この吸気装置１は、複数の分岐通
路２ａ、２ｂ、２ｃ。(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing an intake system of a multi-cylinder engine. In FIG. 1, l indicates an intake system for a five-cylinder engine, and this intake system 1 includes a plurality of branch passages 2a, 2b, and 2c.
２ｄ、２ｅを有している。これらの分岐通路２ａ、２ｂ
、２ｃ、２ｄ、２ｅの下流端部は、エンジンのシリンダ
ヘッド内に各気筒に対応して設けられた５本の吸気ポー
ト（図示せず）に接続している。It has 2d and 2e. These branch passages 2a, 2b
, 2c, 2d, and 2e are connected to five intake ports (not shown) provided in the cylinder head of the engine corresponding to each cylinder.
分岐通路２ａ、２ｂ、２ｃ、２ｄ、２ｅの上流端部は、
束状に集合した集合室３．に接続され、この集合室３の
上流端部は上流通路４さらにエアクリーナ（図示せず）
に接続されている。ここで、この分岐通路２ａ、２ｂ、
２ｃ、２ｄ、２ｅは、それぞれ曲がり部を有しており、
その曲率は分岐通路２ａがほぼ直線状で一番大きく、し
だいに小さくなり、分岐通路２ｅにおいて一番小さくな
っている。The upstream ends of the branch passages 2a, 2b, 2c, 2d, and 2e are
Gathering room gathered in a bundle 3. The upstream end of this gathering chamber 3 is connected to an upstream passage 4 and an air cleaner (not shown).
It is connected to the. Here, these branch passages 2a, 2b,
2c, 2d, and 2e each have a bent part,
The curvature is the largest in the substantially linear branch passage 2a, gradually decreases, and becomes the smallest in the branch passage 2e.
第２図は、第１図の■−■線に沿う断面図である。この
第２図に示されているように、曲率の小さい曲がり部を
有する吸気抵抗が大きい分岐通路２ｅはど集合室３との
接続部のオーバーラツプ面積を大きくとり、曲率の大き
い曲がり部を有する吸気抵抗が小さい分岐通路２ａはど
集合室３との接続部のオーバーラツプ面積を小さく取っ
ている。FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1. As shown in FIG. 2, the branch passage 2e, which has a bend with a small curvature and has a large intake resistance, has a large overlap area at the connection part with the collecting chamber 3, and the intake passage with a bend with a large curvature The overlapping area of the connecting portion between the branch passage 2a, which has low resistance, and the collecting chamber 3 is kept small.
ここで、吸気抵抗の大きさは分岐通路の長さと曲がり部
の曲率の大きさにより求められる。吸気装置においては
、分岐通路の長さよりも曲率の大きさのほうが影響が大
きい。Here, the magnitude of the intake resistance is determined by the length of the branch passage and the magnitude of the curvature of the bend. In the intake device, the magnitude of the curvature of the branch passage has a greater influence than the length of the branch passage.
この実施例においては、各分岐通路２ａ、２ｂ。In this embodiment, each branch passage 2a, 2b.
２ｃ、２ｄ、２ｅの吸気抵抗の大きさが異なるためその
吸気抵抗の大きさに応じて、各分岐通路２ａ、２ｂ、２
ｃ、２ｄ、２ｅと集合室３の接続部のオーバーラツプ面
積を変化させ、曲率の小さい曲がり部を有する吸気抵抗
が大きい分岐通路はど集合室３との接続部のオーバーラ
ツプ面積を大きくとり、曲率の大きい曲がり部を有する
吸気抵抗が小さい分岐通路はど集合室３との接続部のオ
ーバーラツプ面積を小さく取っている。このため、給気
における分配性の改善を図ることができる。Since the intake resistance of 2c, 2d, and 2e is different, each branch passage 2a, 2b, and 2
By changing the overlapping area of the connecting parts between c, 2d, and 2e and the collecting room 3, the branch passage with a bend with a small curvature and a large intake resistance has a large overlapping area of the connecting part with the collecting room 3, and the curvature of the branch passage is increased. The overlapping area of the connection part with the collecting chamber 3 is kept small by the branch passage having a large bend and having a small intake resistance. Therefore, it is possible to improve the distribution of air supply.
第３図は、本発明の吸気装置の他の実施例を示す。この
実施例において、分岐通路２ａ、２ｂ、２ｃ、２ｄ、２
ｅは、分岐通路２ａがほぼ直線状であり、他の分岐通路
２ｂ、２ｃ、２ｄ、２ｅが同一の曲率の曲がり部を有し
ている。このため、分岐通路２ｂ、２ｃ、２ｄ、２ｅと
集合室３との接続部のオーバーラツプ面積が同一となる
ように構成されている。FIG. 3 shows another embodiment of the intake device of the present invention. In this embodiment, branch passages 2a, 2b, 2c, 2d, 2
In e, the branch passage 2a is substantially straight, and the other branch passages 2b, 2c, 2d, and 2e have curved portions with the same curvature. For this reason, the overlapping areas of the connecting portions between the branch passages 2b, 2c, 2d, and 2e and the gathering room 3 are configured to be the same.
上記の実施例は、いずれも吸気装置に本発明を適用した
場合であり、排気装置においても同様に適用できる。The above embodiments are all cases in which the present invention is applied to an intake device, and the present invention can be similarly applied to an exhaust device.
（発明の効果）
以上説明したように、本発明においては、各分岐通路の
流れ抵抗の大きさに応じて、各分岐通路と集合室の接続
部のオーバーラツプ面積を変化させるようにしたので、
吸気分配性の一層の改善をはかり、吸気充填効率を高め
ると共に排気効率を向上させ、エンジン出力性能を向上
させることが可能となる。(Effects of the Invention) As explained above, in the present invention, the overlapping area of the connection between each branch passage and the gathering room is changed depending on the flow resistance of each branch passage.
It is possible to further improve intake air distribution, increase intake air filling efficiency, improve exhaust efficiency, and improve engine output performance.
第１図は本発明の一実施例である多気筒エンジンの吸気
装置を示す斜視図、第２図は第１図の■−■線に沿う断
面図、第３図は本発明の他の実施例の第２図に対応する
断面図、第４図は従来の多気筒エンジンの吸気装置を示
す平面図である。
１・・・５気筒エンジンの吸気装置、 ２ａ、２ｂ、２
ｃ、２ｄ、２ｅ・・・分岐通路、 ３・・・集合室、４
・・・上流通路。
第１図
第２図
第３図FIG. 1 is a perspective view showing an intake system for a multi-cylinder engine which is an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a sectional view corresponding to FIG. 2 of the example, and a plan view showing an intake system for a conventional multi-cylinder engine. 1...5-cylinder engine intake system, 2a, 2b, 2
c, 2d, 2e...branch passage, 3...gathering room, 4
...Upstream passage. Figure 1 Figure 2 Figure 3
Claims (1)
の分岐通路と、これらの分岐通路が束状に集合して接続
された集合室と、この集合室にその一端が接続され上流
側若しくは下流側に延びる通路とを有する多気筒エンジ
ンの吸排気装置において、 各分岐通路の流れ抵抗の大きさに応じて、各分岐通路と
集合室の接続部のオーバーラップ面積を変化させるよう
にしたことを特徴とする多気筒エンジンの吸排気装置。[Claims] A plurality of branch passages each having one end connected to a port of a plurality of cylinders, a collection chamber in which these branch passages are connected in a bundle, and one end of the branch passages connected to the collection chamber. In an intake and exhaust system for a multi-cylinder engine having connected passages extending to the upstream side or the downstream side, the overlapping area of the connection part between each branch passage and the gathering chamber is changed depending on the flow resistance of each branch passage. An intake and exhaust system for a multi-cylinder engine, characterized in that it is configured to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253677A JPH04132826A (en) | 1990-09-21 | 1990-09-21 | Suction/exhaust device for multicylinder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253677A JPH04132826A (en) | 1990-09-21 | 1990-09-21 | Suction/exhaust device for multicylinder engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04132826A true JPH04132826A (en) | 1992-05-07 |
Family
ID=17254633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2253677A Pending JPH04132826A (en) | 1990-09-21 | 1990-09-21 | Suction/exhaust device for multicylinder engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04132826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190293091A1 (en) * | 2016-07-01 | 2019-09-26 | Mitsubishi Electric Corporation | Propeller fan, air-conditioning apparatus and ventilator |
-
1990
- 1990-09-21 JP JP2253677A patent/JPH04132826A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190293091A1 (en) * | 2016-07-01 | 2019-09-26 | Mitsubishi Electric Corporation | Propeller fan, air-conditioning apparatus and ventilator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4641610A (en) | Air intake system of a multicylinder internal combustion engine | |
| EP0467408A2 (en) | Intake system for engine | |
| US4989553A (en) | Air intake device of engine | |
| KR940006043B1 (en) | Intaking apparatus for muliple cylinder engine | |
| JPH04132826A (en) | Suction/exhaust device for multicylinder engine | |
| KR100250050B1 (en) | Variable intake system for v-typed engines | |
| JPH03107520A (en) | Intake device for multiple cylinder engine | |
| JPH082430Y2 (en) | Intake manifold in internal combustion engine | |
| JPH08218938A (en) | Intake/exhaust port for internal combustion engine | |
| JP2782604B2 (en) | Multi-cylinder engine intake system | |
| JP2872791B2 (en) | Engine intake system | |
| JP2828333B2 (en) | Engine intake structure | |
| JPH0716031Y2 (en) | Variable intake system for multi-cylinder internal combustion engine | |
| JPH03281920A (en) | Air intake device of multiple cylinder engine | |
| JP3860955B2 (en) | Purge gas processing apparatus for internal combustion engine | |
| JP2560393Y2 (en) | Multi-cylinder V-type engine intake system | |
| JPS63314358A (en) | Intake manifold for internal combustion engine | |
| JPH0396619A (en) | Suction system for multi-cylinder engine | |
| JPS63219866A (en) | Intake device for internal combustion engine | |
| JPH07253062A (en) | Intake manifold structure for engine | |
| JPH04246271A (en) | Intake device for engine | |
| JPH0673325U (en) | Exhaust manifold of internal combustion engine | |
| JPH0450430A (en) | Intake manifold for internal combustion engine | |
| JPH03107521A (en) | Intake device for multiple cylinder engine | |
| JPH08312479A (en) | Inertial super charging type induction system for three cylinder internal combustion engine |