JPS645081Y2 - - Google Patents
Info
- Publication number
- JPS645081Y2 JPS645081Y2 JP1983009451U JP945183U JPS645081Y2 JP S645081 Y2 JPS645081 Y2 JP S645081Y2 JP 1983009451 U JP1983009451 U JP 1983009451U JP 945183 U JP945183 U JP 945183U JP S645081 Y2 JPS645081 Y2 JP S645081Y2
- Authority
- JP
- Japan
- Prior art keywords
- intake pipe
- passage
- egr
- egr gas
- intake
- 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
- 238000000605 extraction Methods 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は排気ガス中に発生するNOxを低減さ
せるために吸気系へ排気ガスの一部を還流させる
排気ガス再循環装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an exhaust gas recirculation device that recirculates part of the exhaust gas to the intake system in order to reduce NOx generated in the exhaust gas.
（従来の技術）
従来一般のこの種装置では排気系と吸気系とを
配管で連通させているため、エンジンの小型・軽
量化を図る上で一つの障害となつており、又配管
接続部の緩み、損傷等の不具合が生じ易かつた。
このような不具合点を改善するものとして、吸気
管に一体にEGR通路（排気ガス再循環装置）を
形成することによつて、複雑な配管を省略した先
行技術が、特開昭51−143128号公報に開示されて
いる。(Prior art) Conventional devices of this type communicate the exhaust system and intake system with piping, which is an obstacle in making the engine smaller and lighter. Problems such as loosening and damage were likely to occur.
In order to improve these problems, a prior art technique that omitted complicated piping by forming an EGR passage (exhaust gas recirculation device) integrally with the intake pipe was disclosed in Japanese Patent Laid-Open No. 51-143128. Disclosed in the official gazette.
（考案が解決しようとする課題）
ところがこの先行技術においては、EGRガス
の吸気系への導出口を吸気管の下面に上方に向け
て開口せしめた構成としているため、各吸気ポー
ト、延いては各気筒へ均等に燃料及びEGRガス
を分配することが困難になるという問題がある。
すなわち吸気管内を流れる燃料（混合気）は、上
層がガス状であるのに対し下層は液状であつて、
先行技術における如く、前記吸気管の下面より上
方に向けEGRガスを導き入れると、下層の空燃
比への影響が大であるところの液状燃料部分が
EGRガスによつて掻き回されて、燃料の偏流が
生じ易く、各吸気ポートに通ずる分岐通路への燃
料供給量に差が生じ易いという問題が生ずる。又
EGRガスが直接液状燃料に混入されるため、両
者の混合を一様に行うことが困難となり、EGR
ガスを均等に各吸気ポートに分配することも困難
になるという問題が生ずる。(Problem to be solved by the invention) However, in this prior art, the EGR gas outlet to the intake system is configured to open upward on the bottom surface of the intake pipe, so each intake port, and by extension, There is a problem in that it becomes difficult to evenly distribute fuel and EGR gas to each cylinder.
In other words, the upper layer of the fuel (air mixture) flowing in the intake pipe is gaseous, while the lower layer is liquid.
As in the prior art, when EGR gas is introduced upward from the bottom surface of the intake pipe, the liquid fuel portion, which has a large influence on the air-fuel ratio in the lower layer, is
A problem arises in that fuel is likely to be stirred up by the EGR gas, causing uneven flow of fuel, and differences in the amount of fuel supplied to the branch passages leading to each intake port. or
Since EGR gas is directly mixed with liquid fuel, it is difficult to mix the two evenly, and EGR
A problem arises in that it is also difficult to distribute the gas evenly to each intake port.
又近年自動車において、限られた大きさの車体
の内車室を大きくとる一方、エンジンルームをで
きるだけ小さくして、このエンジンルーム内にコ
ンパクトにエンジン、トランスミツシヨン、その
他の部品を配置することが要請されている。従つ
て、エンジン全体の全高を低く、その横幅を小に
することが、排気ガス再循環装置を配設する上で
も強く要求されている。 In addition, in recent years, in automobiles, while increasing the interior space of the limited size of the car body, it has become necessary to make the engine room as small as possible and arrange the engine, transmission, and other parts compactly within this engine room. It is requested. Therefore, it is strongly required to reduce the overall height and width of the engine as a whole when installing an exhaust gas recirculation device.
本考案は上記問題点を解決すると共に、コンパ
クトな排気ガス再循環装置を提供することを目的
とする。 The present invention aims to solve the above problems and provide a compact exhaust gas recirculation device.
（課題を解決するための手段）
本考案は上記目的を達成するため、気化器とシ
リンダヘツドとを略水平に配した吸気管で接続し
たエンジンにおいて、シリンダヘツドにEGRガ
ス抽出通路を形成し、吸気管の上面部に前記
EGRガス抽出通路に連通し終端が吸気管の上面
部側面に開口する第１還流通路を形成し、吸気管
の上面部で第１還流通路の終端より気化器側に寄
つた部分に始端が前記終端の水平方向横側に位置
する第２還流通路を形成し、制御弁体の軸方向が
吸気管の前記上面部側面と平行に水平に延び前記
第１還流通路の終端に連通するガス導入口と前記
第２還流通路の始端に連通するガス流出口とを備
えたEGRバルブを吸気管の上面部側面に取付け、
且つ第２還流通路のEGRガス導出口を吸気管の
吸気通路集合部の上面中央に下方に向けて開口さ
せたことを特徴とする。(Means for Solving the Problem) In order to achieve the above object, the present invention forms an EGR gas extraction passage in the cylinder head in an engine in which a carburetor and a cylinder head are connected by an intake pipe arranged approximately horizontally, above on the top of the intake pipe.
A first reflux passage is formed that communicates with the EGR gas extraction passage and whose terminal end opens on the side surface of the upper surface of the intake pipe, and the starting end is located at a portion of the upper surface of the intake pipe that is closer to the carburetor than the terminal end of the first reflux passage. a gas inlet that forms a second recirculation passage located on the horizontal side of the terminal end, the axial direction of the control valve body extends horizontally parallel to the side surface of the upper surface of the intake pipe, and communicates with the terminal end of the first recirculation passage; and a gas outlet communicating with the starting end of the second recirculation passage, an EGR valve is installed on the upper side of the intake pipe,
In addition, the EGR gas outlet of the second recirculation passage is opened downward at the center of the upper surface of the intake passage gathering portion of the intake pipe.
（実施例）
以下本考案を図面に示す実施例に基き具体的に
説明する。(Example) The present invention will be specifically described below based on an example shown in the drawings.
図示する実施例は２気筒エンジンに本考案を実
施したものであつて、シリンダヘツド１内には内
部において２つの通路に分岐して、夫々気筒３，
３に通ずる吸気ポート２，２を形成すると共に、
２つの排気ポート５，５を各別に形成している。
これら排気ポート５，５は排気マニホルド（図示
せず）に連通している。シリンダヘツド１の一側
面４には前記吸気ポート２，２に連通する吸気管
６を取付けている。この吸気管６の基端は気化器
１９に接続され、且つ略水平に配設されると共
に、その下部には吸気予熱用のウオータジヤケツ
ト８を一体形成し、シリンダヘツド１のウオータ
ジヤケツト９に連通するようにしている。 The illustrated embodiment is a two-cylinder engine in which the present invention is applied, and a cylinder head 1 is internally divided into two passages for cylinders 3 and 3, respectively.
While forming the intake ports 2, 2 leading to 3,
Two exhaust ports 5, 5 are formed separately.
These exhaust ports 5,5 communicate with an exhaust manifold (not shown). An intake pipe 6 communicating with the intake ports 2 is attached to one side 4 of the cylinder head 1. The proximal end of this intake pipe 6 is connected to a carburetor 19 and is disposed approximately horizontally, and a water jacket 8 for preheating intake air is integrally formed at the lower part of the intake pipe 6. I am trying to communicate with you.
シリンダヘツド１にはEGRガス抽出通路１０
を一体に形成し、これを一方の排気ポート５に連
通せしめると共に、その終端１０ａをシリンダヘ
ツド１の前記側面４に開口せしめている。 EGR gas extraction passage 10 in cylinder head 1
is integrally formed, and is communicated with one exhaust port 5, and its terminal end 10a is opened in the side surface 4 of the cylinder head 1.
吸気管６の上面部側面には、制御弁体２１の軸
方向が前記上面部側面と平行に水平に延びる
EGRバルブ１１を直接取付けている。このEGR
バルブ１１のガス導入口１２と前記EGRガス抽
出通路１０の終端１０ａとを連通する第１還流通
路１３は吸気管６の上面部に一体に形成されてい
る。この通路１３は吸気管６のシリンダヘツドへ
の取付フランジ１４の取付面に凹設した溝１３ａ
と吸気管６の上部に設けた平面視するとＬ形の貫
通孔１３ｂとから構成される。前記溝１３ａは吸
気管６をシリンダヘツド１の側面４に取付けると
密閉空間となり、EGRガスを導く通路となる。
前記溝１３ａの始端１３ｃはEGRガス抽出通路
１０の終端１０ａに合致し、その終端１３ｄは前
記貫通孔１３ｂの始端となる。又この貫通孔１３
ｂひいては第１還流通路１３の終端１３ｅは吸気
管６の上面部側面に開口し、EGRバルブ１１の
ガス導入口１２に合致する。 On the side surface of the upper surface of the intake pipe 6, the axial direction of the control valve body 21 extends horizontally in parallel with the side surface of the upper surface.
EGR valve 11 is directly installed. This EGR
A first reflux passage 13 communicating the gas inlet 12 of the valve 11 and the terminal end 10a of the EGR gas extraction passage 10 is integrally formed on the upper surface of the intake pipe 6. This passage 13 is a groove 13a recessed in the mounting surface of the mounting flange 14 of the intake pipe 6 to the cylinder head.
and a through hole 13b provided in the upper part of the intake pipe 6 and having an L shape when viewed from above. The groove 13a becomes a sealed space when the intake pipe 6 is attached to the side surface 4 of the cylinder head 1, and becomes a passage for guiding EGR gas.
The starting end 13c of the groove 13a matches the terminal end 10a of the EGR gas extraction passage 10, and the terminal end 13d thereof becomes the starting end of the through hole 13b. Also, this through hole 13
Furthermore, the terminal end 13e of the first recirculation passage 13 opens on the side surface of the upper surface of the intake pipe 6, and matches the gas inlet 12 of the EGR valve 11.
EGRバルブ１１のガス流出口１５と吸気管６
のEGRガス導出口１６ｃとを連通する第２還流
通路１６は吸気管６の上面部に一体に形成されて
いる。この通路１６の始端１６ａは吸気管６の上
面部側面の前記終端１３ｅより気化器１９側に寄
つた部分に略同一高さ位置に開口し、前記ガス流
出口１５に合致する。又この通路１６の終端部１
６ｂは下方に向け屈曲し、その終端であるEGR
ガス導出口１６ｃは吸気管６の上面中央に開口し
ている。この吸気管６はこれ自体が２つの吸気ポ
ート２，２が集合する吸気通路集合部となつてい
るが、吸気管６が途中で分岐する場合には、前記
EGRガス導出口１６ｃは吸気管６の吸気通路集
合部に開口している必要がある。 Gas outlet 15 of EGR valve 11 and intake pipe 6
A second reflux passage 16 communicating with the EGR gas outlet 16c is integrally formed on the upper surface of the intake pipe 6. A starting end 16a of the passage 16 opens at a position closer to the carburetor 19 than the terminal end 13e on the side surface of the upper surface of the intake pipe 6 at substantially the same height, and coincides with the gas outlet 15. Also, the terminal end 1 of this passage 16
6b is bent downward, and the end is the EGR
The gas outlet 16c opens at the center of the upper surface of the intake pipe 6. This intake pipe 6 itself serves as an intake passage gathering part where the two intake ports 2, 2 come together, but when the intake pipe 6 branches in the middle, the above-mentioned
The EGR gas outlet 16c needs to open to the intake passage gathering portion of the intake pipe 6.
かくしてEGRガスは、シリンダヘツド１に一
体に形成したEGRガス抽出通路１０、吸気管６
に一体に形成した第１還流通路１３、EGRバル
ブ１１、及び吸気管６に一体に形成した第２還流
通路１６の順序に従つてEGRガス導出口１６ｃ
に導かれ、吸気管６の上面部中央から下方に向け
吸気管６内に供給される。 In this way, the EGR gas flows through the EGR gas extraction passage 10 and the intake pipe 6, which are integrally formed in the cylinder head 1.
The EGR gas outlet 16c follows the order of the first recirculation passage 13 formed integrally with the intake pipe 6, the EGR valve 11, and the second recirculation passage 16 integrally formed with the intake pipe 6.
and is supplied into the intake pipe 6 from the center of the upper surface of the intake pipe 6 downward.
上記構成のEGR通路Ａに導かれて還流した
EGRガスは、吸気管６の上層を流れる同じ気体
成分である混合気のガス状部分に、先ず混合され
る。このため両者の混合は一様に行われ易く、次
いで前記吸気管６の下層を流れる混合気の液状部
分と混合される場合もそれが均等に行われ易い。
又EGRガスは前記吸気管６のEGRガス導出口１
６ｃから混合気の流れと略直角の方向で且つ下方
に向けて吸気管６に導入されるので、吸気管６の
下層を流れる混合気の液状成分に偏流を生じさせ
ることが少なくなる。これらの結果、各気筒へ均
等に燃料（混合気）及びEGRガスを分配するこ
とが容易となる。 The reflux was guided to the EGR passage A with the above configuration.
The EGR gas is first mixed with the gaseous part of the mixture, which is the same gaseous component, flowing in the upper layer of the intake pipe 6. For this reason, it is easy to mix both of them uniformly, and even when they are then mixed with the liquid portion of the air-fuel mixture flowing in the lower layer of the intake pipe 6, it is easy to mix them evenly.
Also, the EGR gas is supplied to the EGR gas outlet 1 of the intake pipe 6.
Since it is introduced into the intake pipe 6 from 6c in a direction substantially perpendicular to the flow of the air-fuel mixture and downward, the liquid component of the air-fuel mixture flowing in the lower layer of the intake pipe 6 is less likely to be biased. As a result, it becomes easy to evenly distribute fuel (mixture) and EGR gas to each cylinder.
尚、図面において、１７はシリンダブロツク、
１８はシリンダヘツドカバー、２０は吸気バル
ブ、２２はEGRバルブ内ガス通路、２３，２４
はガスケツトである。 In addition, in the drawing, 17 is a cylinder block,
18 is the cylinder head cover, 20 is the intake valve, 22 is the gas passage inside the EGR valve, 23, 24
is a gasket.
本考案は上記実施例に示す外、種々の態様に構
成することができる。例えば吸気管６として、上
記実施例とは異なり多枝状の吸気管（インテーク
マニホルド）を用いた場合には、その集合部（非
多枝管部）に第２還流通路のEGRガス導出口を
設け、その上面中央に下方に向けて前記EGRガ
ス導出口を開口させるように構成することができ
る。又シリンダヘツド１や吸気管６に一体に形成
する通路１０，１３，１６を、所定形状に形成し
た金属パイプを本体に鋳込むことによつて構成す
ることもできる。 The present invention can be configured in various ways other than those shown in the above embodiments. For example, when a multi-branched intake pipe (intake manifold) is used as the intake pipe 6, unlike the above embodiment, the EGR gas outlet of the second recirculation passage is connected to the converging part (non-multibranched pipe part). The EGR gas outlet can be configured such that the EGR gas outlet is opened downward at the center of the upper surface thereof. Alternatively, the passages 10, 13, and 16 formed integrally with the cylinder head 1 and the intake pipe 6 can be constructed by casting metal pipes formed into a predetermined shape into the main body.
（考案の効果）
本考案は上記構成を有するので、次のような効
果を奏することができる。(Effects of the invention) Since the present invention has the above configuration, it can produce the following effects.
EGR通路を、シリンダヘツドに一体に形成
したEGRガス抽出通路、吸気管に一体に形成
した第１還流通路及び第２還流通路、並びに吸
気管の２つの還流通路を連通するEGRバルブ
によつて構成しているので、複雑な配管を省略
でき、エンジンの小型・軽量化が容易となり、
配管接続部の緩み、損傷等の不具合が生じなく
なる。 The EGR passage consists of an EGR gas extraction passage formed integrally with the cylinder head, a first recirculation passage and a second recirculation passage formed integrally with the intake pipe, and an EGR valve that communicates the two recirculation passages of the intake pipe. Because of this, complicated piping can be omitted, making it easier to make the engine smaller and lighter.
Problems such as loosening and damage of piping connections will no longer occur.
又EGRバルブとは吸気管とは共に略水平に
平行に配され、EGRバルブは吸気管の上面部
側面に平行に取付けられる構成となつているた
め、この部分の全高を小にできると共に、
EGRバルブをその連通部側方に近接して配置
できてEGRバルブ取付部の幅を小にできる。
従つて、吸気管の側方上部空間を有効利用して
最小スペースでEGRバルブを配置できる結果、
この面からも装置のコンパクト化を図ることが
できる。 In addition, the EGR valve is arranged substantially horizontally and parallel to the intake pipe, and the EGR valve is installed parallel to the upper side of the intake pipe, so the overall height of this part can be reduced, and
The EGR valve can be placed close to the side of the communication part, making it possible to reduce the width of the EGR valve mounting part.
Therefore, the EGR valve can be placed in the minimum space by effectively utilizing the space above the side of the intake pipe.
Also from this point of view, the device can be made more compact.
EGR通路のEGRガス導出口を吸気管の吸気
通路集合部の上面中央に下方に向けて開口させ
ているので、各気筒へ均等に燃料及びEGRガ
スを分配することが容易となり、ドライバビリ
テイを向上させることができる。 Since the EGR gas outlet of the EGR passage is opened downward at the center of the upper surface of the intake passage gathering part of the intake pipe, it is easy to distribute fuel and EGR gas evenly to each cylinder, improving drivability. can be improved.
図面は本考案の実施例を示し、第１図はその一
部縦断側面図、第２図はシリンダヘツドの底面
図、第３図はシリンダヘツドの縦断面図、第４図
は吸気管の平面図、第５図はEGR通路の概念図
である。
１……シリンダヘツド、６……吸気管、１０…
…EGRガス抽出通路、１２……ガス導入口、１
３……第１還流通路、１５……ガス流出口、１６
……第２還流通路、１６ｃ……EGRガス導出口、
１９……気化器、２１……制御弁体、Ａ……
EGR通路。
The drawings show an embodiment of the present invention, with Fig. 1 being a partially longitudinal side view, Fig. 2 being a bottom view of the cylinder head, Fig. 3 being a longitudinal sectional view of the cylinder head, and Fig. 4 being a plan view of the intake pipe. Figure 5 is a conceptual diagram of the EGR passage. 1...Cylinder head, 6...Intake pipe, 10...
...EGR gas extraction passage, 12...Gas inlet, 1
3...First reflux passage, 15...Gas outlet, 16
...Second reflux passage, 16c...EGR gas outlet,
19... Carburizer, 21... Control valve body, A...
EGR passage.
Claims (1)
気管で接続したエンジンにおいて、シリンダヘツ
ドにEGRガス抽出通路を形成し、吸気管の上面
部に前記EGRガス抽出通路に連通し終端が吸気
管の上面部側面に開口する第１還流通路を形成
し、吸気管の上面部で第１還流通路の終端より気
化器側に寄つた部分に始端が前記終端の水平方向
横側に位置する第２還流通路を形成し、制御弁体
の軸方向が吸気管の前記上面部側面と平行に水平
に延び前記第１還流通路の終端に連通するガス導
入口と前記第２還流通路の始端に連通するガス流
出口とを備えたEGRバルブを吸気管の上面部側
面に取付け、且つ第２還流通路のEGRガス導出
口を吸気管の吸気通路集合部の上面中央に下方に
向けて開口させたことを特徴とする排気ガス再循
環装置。 In an engine in which a carburetor and a cylinder head are connected by an intake pipe arranged approximately horizontally, an EGR gas extraction passage is formed in the cylinder head, and the upper surface of the intake pipe is connected to the EGR gas extraction passage, and the terminal end of the intake pipe is connected to the EGR gas extraction passage. A first reflux passage is formed that opens on the side surface of the upper surface, and a second reflux passage whose starting end is located on the horizontal side of the terminal end is formed in a portion of the upper surface of the intake pipe that is closer to the carburetor than the terminal end of the first reflux passage. A gas inlet forming a passage, the axial direction of the control valve body extending horizontally parallel to the side surface of the upper surface of the intake pipe, and communicating with the terminal end of the first recirculation passage and the starting end of the second recirculation passage. An EGR valve equipped with an outflow port is attached to the side surface of the upper surface of the intake pipe, and the EGR gas outlet of the second recirculation passage is opened downward at the center of the upper surface of the intake passage gathering part of the intake pipe. Exhaust gas recirculation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP945183U JPS59115846U (en) | 1983-01-25 | 1983-01-25 | Exhaust gas recirculation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP945183U JPS59115846U (en) | 1983-01-25 | 1983-01-25 | Exhaust gas recirculation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59115846U JPS59115846U (en) | 1984-08-04 |
| JPS645081Y2 true JPS645081Y2 (en) | 1989-02-08 |
Family
ID=30140909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP945183U Granted JPS59115846U (en) | 1983-01-25 | 1983-01-25 | Exhaust gas recirculation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115846U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010050566A1 (en) * | 2008-10-31 | 2010-05-06 | 株式会社神菱 | Delivery pipe |
| JP5393311B2 (en) * | 2009-07-13 | 2014-01-22 | 三菱重工業株式会社 | EGR device in the engine room |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51143128A (en) * | 1975-06-03 | 1976-12-09 | Mitsubishi Motors Corp | Exhaust purifying device |
| JPS5622457B2 (en) * | 1974-12-21 | 1981-05-25 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5622457U (en) * | 1979-07-31 | 1981-02-27 | ||
| JPS56105647U (en) * | 1980-01-17 | 1981-08-18 |
-
1983
- 1983-01-25 JP JP945183U patent/JPS59115846U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5622457B2 (en) * | 1974-12-21 | 1981-05-25 | ||
| JPS51143128A (en) * | 1975-06-03 | 1976-12-09 | Mitsubishi Motors Corp | Exhaust purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59115846U (en) | 1984-08-04 |
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