JPS6033333Y2 - Internal combustion engine intake system - Google Patents
Internal combustion engine intake systemInfo
- Publication number
- JPS6033333Y2 JPS6033333Y2 JP18065680U JP18065680U JPS6033333Y2 JP S6033333 Y2 JPS6033333 Y2 JP S6033333Y2 JP 18065680 U JP18065680 U JP 18065680U JP 18065680 U JP18065680 U JP 18065680U JP S6033333 Y2 JPS6033333 Y2 JP S6033333Y2
- Authority
- JP
- Japan
- Prior art keywords
- collecting pipe
- cylinder
- intake
- air
- intake passage
- 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.)
- Expired
Links
Landscapes
- Characterised By The Charging Evacuation (AREA)
Description
【考案の詳細な説明】
本考案は、多気筒内燃機関において、横型気化器からの
混合気を各気筒に略等しい空燃比の下で分配するように
した吸気装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for a multi-cylinder internal combustion engine, which distributes a mixture from a horizontal carburetor to each cylinder at a substantially equal air-fuel ratio.
気化器からの混合気を各気筒に分配する従来の吸気マニ
ホールドは、気化器が取付く集合部に各気筒への吸気通
路を各々異なった方向に向けて水平状に接続しており、
また各気筒への吸気通路の長さも異なるため、集合部か
ら各吸気通路への流れが不均等になるから、気化器から
の混合気を各気筒に等しく分配できず、各気筒への混合
気の空燃比及び充填効率が同じにならない。Conventional intake manifolds, which distribute the air-fuel mixture from the carburetor to each cylinder, connect the intake passages to each cylinder horizontally in different directions to the collecting part where the carburetor is attached.
Also, since the length of the intake passages to each cylinder is different, the flow from the gathering part to each intake passage becomes uneven, so the air-fuel mixture from the carburetor cannot be distributed equally to each cylinder, and the air-fuel mixture to each cylinder becomes uneven. The air-fuel ratio and charging efficiency are not the same.
従って各気筒での燃焼が不揃いになって機関の振動及び
騒音が増大する不都合があった。Therefore, combustion in each cylinder becomes uneven, resulting in an increase in vibration and noise of the engine.
この場合、気化器が縦型であると、気化器から流下した
混合気は吸気マニホールドの集合部において水平方向に
方向転換させられ、その際混合気は攪拌作用を受けると
共に一旦流速を落としてから各吸気通路に分散すること
になるので、各気筒に対する混合気の分配量及び空燃比
を可成り均一化できるという利点がある。In this case, if the carburetor is vertical, the air-fuel mixture flowing down from the carburetor is turned horizontally at the gathering part of the intake manifold, and at this time, the air-fuel mixture is subjected to an agitating action and the flow velocity is reduced once, then Since the air-fuel mixture is distributed to each intake passage, there is an advantage that the amount of air-fuel mixture distributed to each cylinder and the air-fuel ratio can be made fairly uniform.
しかし、横型気化器の場合には、混合気は水平方向への
方向性を与えられた状態でマニホールド集合部に流入す
ることになるので、従来の吸気マニホールドのように、
吸気通路を三股状とか四股状とかいう風に単に水平方向
に分岐させただけのものにあっては、一定方向に流れる
混合気を各吸気通路に対して均一に取入れることが困難
であり、更に横型気化器の場合にはその性質上混合気の
下層部の燃料密度が高くなる傾向を呈し、各吸気通路中
の混合気自体に空燃比のバラつきがあり、前記不都合が
一層倍加するのであった。However, in the case of a horizontal carburetor, the air-fuel mixture flows into the manifold gathering part with directionality in the horizontal direction, so like a conventional intake manifold,
If the intake passages are simply branched horizontally in a three-pronged or four-pronged configuration, it is difficult to uniformly introduce the air-fuel mixture flowing in a certain direction into each intake passage; In the case of a horizontal carburetor, the fuel density tends to be higher in the lower part of the air-fuel mixture due to its nature, and there are variations in the air-fuel ratio of the air-fuel mixture itself in each intake passage, further compounding the above-mentioned disadvantages. .
本考案は、このように横型気化器付の多気筒内燃機関に
おける前記不都合を改善しようとするもので、吸気マニ
ホールドにおける集合管と各吸気通路とを接続するに当
り、各吸気通路を従来のように単に三股状とか四股状と
かに分岐させるのではなく、各吸気通路における集合管
部との接続部側の先端部を、当該各先端部の軸線が集合
管部の軸線と略平行で且つ、集合管部の軸線方向視にお
いて各先端部が正多角形状に配列されるように束ね形成
すると共に、前記各先端部の横断面と前記集合管部の横
断面とが、集合管部の軸線方向視において互いに一部重
合するよう構成したもので、集合管部からの混合気が各
吸気通路に対して直進できるようにすることによって気
化器からの混合気を各吸気通路に略等しく分配できるよ
うにしたものである。The present invention attempts to improve the above-mentioned disadvantages in a multi-cylinder internal combustion engine equipped with a horizontal carburetor. Rather than simply branching into a three-pronged or four-pronged shape, the tip of each intake passage on the side where it connects to the collecting pipe section is such that the axis of each tip is approximately parallel to the axis of the collecting pipe section, and The tips are bundled so that they are arranged in a regular polygonal shape when viewed in the axial direction of the collecting pipe section, and the cross section of each tip end and the cross section of the collecting pipe section are aligned in the axial direction of the collecting pipe section. They are constructed so that they partially overlap each other when viewed, and by allowing the air-fuel mixture from the collecting pipe to travel straight to each intake passage, the air-fuel mixture from the carburetor can be distributed approximately equally to each intake passage. This is what I did.
以下本考案を3気筒内燃機関に適用した場合の実施例の
図面(第1図〜第3図)について説明すると、図におい
て、Aは第1気筒A1、第2気筒N及び第3気筒氏を有
する3気筒内燃機関、1は吸気マニホールド、2は横型
気化器を各々示し、前記吸気マニホールド1は、一端に
前記横型気化器2が取付く略水平方向の集合管部3と、
前記機関Aの各気筒A19 A2.A3における吸気ポ
ー)4,5.6にフランジ接続される3本の吸気通路?
、 8.9とからなり、各吸気通路?、 8.9の先端
を前記集合管部3の他端に一体的に接続するにおいて5
、各吸気通路?、 8.9の先端部分を、当該先端部分
の軸線、が集合管部3の軸線と平行又は略平行になるよ
うに折曲すると共に、各吸気通路?、8.9の先端が集
合管部3の軸線方向に沿って見た状態において正三角形
又は略正三角形配列になるように束ね形威し、且つこれ
を前記集合管部3の他端に対して、集合管部3の断面に
対して各吸気通路?、 8.9の断面が各々一部重合
するように接続して成るものである。Below, the drawings (Figs. 1 to 3) of an embodiment in which the present invention is applied to a three-cylinder internal combustion engine will be explained. In the drawings, A indicates the first cylinder A1, the second cylinder N, and the third cylinder. 1 is an intake manifold, 2 is a horizontal carburetor, and the intake manifold 1 has a generally horizontal collecting pipe portion 3 to which the horizontal carburetor 2 is attached at one end;
Each cylinder A19 A2 of the engine A. Intake port in A3) Three intake passages connected by flanges to 4, 5.6?
, 8.9 and each intake passage? , 8. In integrally connecting the tip of 9 to the other end of the collecting pipe section 3, 5
, each intake passage? , 8.9 is bent so that the axis of the tip is parallel or substantially parallel to the axis of the collecting pipe section 3, and each intake passage ? . So, each intake passage with respect to the cross section of the collecting pipe section 3? , 8.9 are connected so that each cross section partially overlaps with the other.
また、各吸気通路の長さが等しくなるように各吸気通路
を構成してもよい。Further, each intake passage may be configured so that the length of each intake passage is equal.
なお、図中符号11は吸気予熱用のライザ一部である。Note that the reference numeral 11 in the figure is a part of a riser for preheating intake air.
このように構成すれば、集合管部3からの混合気は各吸
気通路?、 8.9の先端入口に向って直進し、混合気
は、各吸気通路?、 8.9の断面が集合管部3の断面
に重合する面積に応じて、各吸気通路に分配されるから
、この重合する面積を適当に設定することにより、混合
気を各吸気通路について等しく分配することができる。With this configuration, the air-fuel mixture from the collecting pipe section 3 can be distributed to each intake passage. , Go straight towards the tip inlet of 8.9, and the mixture is in each intake passage? , 8.9 is distributed to each intake passage according to the area where it overlaps with the cross section of the collecting pipe section 3, so by appropriately setting this area where this overlap, the air-fuel mixture can be distributed equally to each intake passage. can be distributed.
すなわち、集合管部3からの混合気が、第2気筒用吸気
通路8に多く入る傾向にあるときには、当該第2気筒用
吸気通路8の集合管部3への重合面積を、第1気筒用吸
気通路7及び第3気筒用吸気通路9の集合管部3への重
合面積より小さくし、また、第1及び第2気筒用吸気通
路7,9に多く入る傾向にあると舶どは、当該両吸気通
路7.9の重合面積を小さくすることにより、各吸気通
路に対する混合気の分配を平均化できるのである。That is, when a large amount of the air-fuel mixture from the collecting pipe section 3 tends to enter the intake passage 8 for the second cylinder, the overlapping area of the intake passage 8 for the second cylinder with the collecting pipe section 3 is If the overlapping area of the intake passage 7 and the intake passage 9 for the third cylinder into the collecting pipe section 3 is smaller than that of the intake passage 7 and the intake passage 9 for the third cylinder, and if there is a tendency for a large amount to enter the intake passages 7 and 9 for the first and second cylinders, By reducing the overlapping area of both intake passages 7.9, it is possible to equalize the distribution of the air-fuel mixture to each intake passage.
この場合、各吸気通路?、 8.9は第4図に示すよう
に逆向きの正三角形配列にしても良く、また、4気筒用
内燃機関A′の場合には、第5図及び第6図に示すよう
に各気筒A□’v Ag’t Ae’9N′に対する吸
気通路?’、8’、9’I O’の先端を正方形又は略
正方形配列に揃えて、横型気化器2′が取付く集合管部
3′に対して前記要領で接続すれば良く、6気筒内燃機
関に対しても六角形又は略六角形配列することで同様に
適用できるのである。In this case, each intake passage? , 8.9 may be arranged in an inverted equilateral triangle arrangement as shown in FIG. 4, and in the case of a four-cylinder internal combustion engine A', each cylinder A□'v Ag't Intake passage for Ae'9N'? ', 8', 9'I O' should be aligned in a square or substantially square arrangement and connected in the manner described above to the collecting pipe section 3' to which the horizontal carburetor 2' is attached. The same application can be made to a hexagonal or substantially hexagonal arrangement.
以上の通り本考案によれば、多気筒内燃機関における各
気筒に対して横型気化器からの混合気を略等しく分配で
き空燃比及び充填効率を平均化できるから、各気筒にお
ける燃焼が揃って、機関の振動及び騒音を低減できる一
方、混合気は集合管部から各吸気通路に真直ぐ流れるか
ら、気化器から各気筒に至る間の流れ抵抗が小さく、加
速応答性と出力とを向上できる効果を有する。As described above, according to the present invention, the air-fuel mixture from the horizontal carburetor can be distributed approximately equally to each cylinder in a multi-cylinder internal combustion engine, and the air-fuel ratio and charging efficiency can be averaged, so that combustion in each cylinder is uniform. While engine vibration and noise can be reduced, the air-fuel mixture flows straight from the collecting pipe to each intake passage, so there is little flow resistance from the carburetor to each cylinder, which has the effect of improving acceleration response and output. have
図面は本考案の実施例を示し、第1図は3気筒内燃機関
に適用した場合の平面図、第2図は第1図の■−■視拡
大断面図、第3図は第2図のm−■視拡大断面図、第4
図は別の実施例における第3図と同じ箇所の断面図、第
5図は4気筒内燃機関に適用した場合の平面図、第6図
は第5図の■−■視拡大断面図である。
A、 A’・・・・・・機関、2,2′・・・・・・気
化器、1゜1′・・・・・・吸気マニホールド、3.3
’・・・・・・集合管部、?、 8.9、?’、8’、
9’、10’・・・・・・吸気通路。The drawings show an embodiment of the present invention; FIG. 1 is a plan view when applied to a three-cylinder internal combustion engine, FIG. m-■ enlarged sectional view, 4th
The figure is a cross-sectional view of the same part as FIG. 3 in another embodiment, FIG. 5 is a plan view when applied to a four-cylinder internal combustion engine, and FIG. 6 is an enlarged cross-sectional view taken along the line - ■ of FIG. . A, A'... Engine, 2, 2'... Carburetor, 1゜1'... Intake manifold, 3.3
'...Collecting pipe section? , 8.9,? ', 8',
9', 10'...Intake passage.
Claims (1)
る吸気マニホールドを、前記横型気化器に取付く集合管
部と、当該集合管部から分岐して前記各気筒に取付く各
吸気通路とで構成すると共に、前記マニホールドにおけ
る集合管部を略水平状に配設して成る内燃機関の吸気装
置において、前記各吸気通路における集合管部との接続
部側の先端部を、当該各先端部の軸線が集合管部の軸線
と略平行で且つ、これら各先端部が集合管部の軸線方向
視において互いに正多角形又は略正多角形に配列される
よう束ね形威し、これら各先端部を前記集合管部に対し
、当該先端部の各横断面が前記集合管部の横断面と互い
に一部重合した状態で接続したことを特徴とする内燃機
関の吸気装置。An intake manifold for distributing the air-fuel mixture from the horizontal carburetor to each cylinder of a multi-cylinder engine, a collecting pipe section attached to the horizontal carburetor, and each intake passage branching from the collecting pipe section and attached to each cylinder. In the intake system for an internal combustion engine, the manifold has a collecting pipe section disposed substantially horizontally, the tip end of each of the intake passages on the connection side with the collecting pipe section; The axes of the parts are substantially parallel to the axis of the collecting pipe part, and each of these tips is arranged in a regular polygon or a substantially regular polygon when viewed in the axial direction of the collecting pipe part. An air intake device for an internal combustion engine, characterized in that the tip portion is connected to the collecting pipe portion in a state in which each cross section of the tip portion partially overlaps a cross section of the collecting pipe portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18065680U JPS6033333Y2 (en) | 1980-12-15 | 1980-12-15 | Internal combustion engine intake system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18065680U JPS6033333Y2 (en) | 1980-12-15 | 1980-12-15 | Internal combustion engine intake system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57101367U JPS57101367U (en) | 1982-06-22 |
JPS6033333Y2 true JPS6033333Y2 (en) | 1985-10-04 |
Family
ID=29977436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18065680U Expired JPS6033333Y2 (en) | 1980-12-15 | 1980-12-15 | Internal combustion engine intake system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6033333Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106662050A (en) * | 2014-07-01 | 2017-05-10 | 本田技研工业株式会社 | Intake device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2548584Y2 (en) * | 1990-09-26 | 1997-09-24 | マツダ株式会社 | Engine intake system |
-
1980
- 1980-12-15 JP JP18065680U patent/JPS6033333Y2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106662050A (en) * | 2014-07-01 | 2017-05-10 | 本田技研工业株式会社 | Intake device |
Also Published As
Publication number | Publication date |
---|---|
JPS57101367U (en) | 1982-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH04128567A (en) | Intake device for engine | |
JPS6033333Y2 (en) | Internal combustion engine intake system | |
JPH01173459U (en) | ||
JPS6330498B2 (en) | ||
JPH0614051Y2 (en) | Internal combustion engine intake manifold | |
JPH022934Y2 (en) | ||
JPS6034770Y2 (en) | Internal combustion engine intake manifold | |
JPS6123649Y2 (en) | ||
JP2542030B2 (en) | Internal combustion engine intake system | |
JP3485156B2 (en) | Structure of Inertial Supercharged Intake Manifold for Multi-Cylinder Internal Combustion Engine | |
JPH0754604Y2 (en) | Intake device in a three-cylinder internal combustion engine | |
JPS6313392Y2 (en) | ||
JPS6129958Y2 (en) | ||
JPH022935Y2 (en) | ||
JPH0417804Y2 (en) | ||
JP2528171B2 (en) | Intake Manifold | |
JP2548584Y2 (en) | Engine intake system | |
JPS6212862Y2 (en) | ||
JPS6115244Y2 (en) | ||
JPS6140937Y2 (en) | ||
JPS6339383Y2 (en) | ||
JP3452787B2 (en) | Structure of Inertial Supercharged Intake Manifold for Multi-Cylinder Internal Combustion Engine | |
JPH0528378Y2 (en) | ||
JP2517136Y2 (en) | Multi-cylinder engine intake system | |
JPH0130607Y2 (en) |