JPH0567781B2 - - Google Patents
Info
- Publication number
- JPH0567781B2 JPH0567781B2 JP58238632A JP23863283A JPH0567781B2 JP H0567781 B2 JPH0567781 B2 JP H0567781B2 JP 58238632 A JP58238632 A JP 58238632A JP 23863283 A JP23863283 A JP 23863283A JP H0567781 B2 JPH0567781 B2 JP H0567781B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- cylinder
- intake
- gas recirculation
- 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 - Lifetime
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、エンジンの排気ガス還流装置の改善
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an exhaust gas recirculation device for an engine.
（従来の技術）
従来、排気ガス対策の一環として、排気ガスの
一部を吸気系に還流させることにより、排気ガス
中のNOxを低減する様にした、いわゆる排気ガ
ス還流装置が知られている。(Prior art) Conventionally, as part of exhaust gas countermeasures, so-called exhaust gas recirculation devices have been known that reduce NOx in exhaust gas by recirculating part of the exhaust gas to the intake system. .
この一つの方法として、各気筒の吸気通路集合
部に排気ガス還流通路を開口させたものがある。
しかし、この場合、マニホルドの形状及び燃焼室
までの距離の違い等によつて、各気筒へ排気ガス
が、均一に分配されにくい欠点がある。 One method for this is to open an exhaust gas recirculation passage in the intake passage gathering portion of each cylinder.
However, in this case, there is a drawback that the exhaust gas is difficult to be uniformly distributed to each cylinder due to the shape of the manifold and the distance to the combustion chamber.
そこで、実開昭51−137024号公報に記載されて
いる様に、４気筒エンジンにおいて、エンジンの
吸気マニホルドに気筒配列方向に延びる中央集合
部と、該集合部より分岐して吸気マニホルドの各
ブランチ部に連通する分岐管とからなる排気ガス
還流通路を付設し、エンジンの各気筒に排気を均
等に分配導入するものがある。 Therefore, as described in Japanese Utility Model Application Publication No. 51-137024, in a four-cylinder engine, the intake manifold of the engine has a central collecting part extending in the cylinder arrangement direction, and each branch of the intake manifold branches from the collecting part. Some engines are equipped with an exhaust gas recirculation passage consisting of a branch pipe that communicates with the engine, to evenly distribute and introduce exhaust gas into each cylinder of the engine.
この場合、例えば中央集合通路の１番目の気筒
側から排気ガスを導くと、４気筒エンジンの吸気
順序は、通常１−３−４−２であることから、１
番の気筒から３番の気筒に吸気が移る時、両気筒
間の排気ガス還流通路内には排気ガスがほとんど
なく、排気ガスが３番の気筒に流れるまでに３番
の気筒の吸気が終わつてしまうことで、必らずし
も各気筒への排気ガスの分配が、均等になるとは
言えない。また、４番目の気筒側から排気ガスを
導いた場合、４番から２番の気筒に吸気が移る際
両気筒間の排気ガス還流通路内には、排気ガスが
なく２番の気筒に流れるまでに、上記２番の吸気
が終わつてしまうので、この場合も各気筒への排
気ガスの分配が、均等になるとは言えない。 In this case, for example, if exhaust gas is led from the first cylinder side of the central passageway, the intake order of a four-cylinder engine is normally 1-3-4-2, so 1
When the intake air moves from the No. 3 cylinder to the No. 3 cylinder, there is almost no exhaust gas in the exhaust gas recirculation passage between the two cylinders, and the intake of the No. 3 cylinder ends before the exhaust gas flows to the No. 3 cylinder. As a result, the distribution of exhaust gas to each cylinder cannot necessarily be said to be equal. In addition, when exhaust gas is introduced from the 4th cylinder side, when the intake air moves from the 4th cylinder to the 2nd cylinder, there is no exhaust gas in the exhaust gas recirculation passage between both cylinders until it flows to the 2nd cylinder. In addition, since the above-mentioned No. 2 intake ends, in this case as well, it cannot be said that the distribution of exhaust gas to each cylinder will be equal.
（発明の目的）
本発明は、上記従来の問題点に鑑みなされたも
のであつて、吸気順序と排気ガス還流通路内の排
気ガスの流れ方向とを一定の関係にすることによ
り、各気筒に対し均一に排気ガスの分配できる排
気ガス還流装置を提供することを目的とする。(Object of the Invention) The present invention has been made in view of the above-mentioned problems of the conventional art.The present invention has been made in view of the above-mentioned problems of the conventional art. On the other hand, it is an object of the present invention to provide an exhaust gas recirculation device that can uniformly distribute exhaust gas.
（発明の構成）
本発明に係るエンジンの排気ガス還流装置は、
上記目的達成のため次のように構成される。(Structure of the Invention) The engine exhaust gas recirculation device according to the present invention includes:
In order to achieve the above objectives, it is structured as follows.
気筒配列の順に吸気の流入が行なわれるように
吸気順序を設定し、かつ、排気ガス還流通路を気
筒配列方向に延設するとともに、該排気ガス還流
通路と各吸気通路とを連通する連通孔を形成し、
更には排気ガス還流通路の上流端を吸気順序の最
も早い気筒に接続することにより、排気ガスの流
れと吸気順序とを同方向にした。 The intake order is set so that intake air flows in the order of the cylinder arrangement, and the exhaust gas recirculation passage is extended in the direction of the cylinder arrangement, and communication holes are provided to communicate the exhaust gas recirculation passage and each intake passage. form,
Furthermore, by connecting the upstream end of the exhaust gas recirculation passage to the cylinder with the earliest intake order, the flow of exhaust gas and the intake order are made to be in the same direction.
（発明の効果）
本発明は、以上のように構成されることから、
排気ガス還流通路の上流から順番に排気ガスが各
気筒に吸入されるため排気ガスの慣性力により上
流から違い気筒に対しても排気ガスが十分供給さ
れる。そのため排気ガスの分配をより一層向上で
き、エミツシヨンを低減できると共に、燃費が向
上できる。(Effect of the invention) Since the present invention is configured as described above,
Since exhaust gas is drawn into each cylinder in order from the upstream side of the exhaust gas recirculation passage, exhaust gas is sufficiently supplied from upstream to different cylinders due to the inertial force of the exhaust gas. Therefore, the distribution of exhaust gas can be further improved, emissions can be reduced, and fuel efficiency can be improved.
（実施例）
以下、本発明を図面に基づいて説明する。第１
図に示すように、Ｖ型エンジン１は、１つのシリ
ンダブロツク２と２つのシリンダヘツド３，３′
とにより、クランクシヤフト４の回りに一定角度
をもつて配設された２つのバンク５，５′を有す
る。これらのバンク５，５′には、シリンダ６，
６′が設けられると共に、該シリンダ６，６′には
ピストン７，７′が嵌装されて、該ピストン７，
７′は夫々コンロツド８，８′を介して、上記クラ
ンクシヤフト４に連結される。(Example) Hereinafter, the present invention will be explained based on the drawings. 1st
As shown in the figure, a V-type engine 1 includes one cylinder block 2 and two cylinder heads 3, 3'.
As a result, there are two banks 5, 5' arranged around the crankshaft 4 at a constant angle. These banks 5, 5' have cylinders 6,
6' are provided, and pistons 7, 7' are fitted into the cylinders 6, 6', and the pistons 7, 7' are fitted into the cylinders 6, 6'.
7' are connected to the crankshaft 4 through connecting rods 8 and 8', respectively.
また、上記シリンダヘツド３，３′には、夫々
シリンダ６，６′に通じる吸気ポート９，９′と排
気ポート１０，１０′とが設けられていると共に、
各ポートのシリンダ６，６′への開口部には、吸
気弁１１，１１′及び排気弁１２，１２′が、備え
られている。 Further, the cylinder heads 3, 3' are provided with intake ports 9, 9' and exhaust ports 10, 10' communicating with the cylinders 6, 6', respectively.
An intake valve 11, 11' and an exhaust valve 12, 12' are provided at the opening of each port to the cylinder 6, 6'.
上記シリンダ６，６′は、第２図に示すように
クランクシヤフト４方向に沿つて、夫々３つづつ
設けられることにより計６つの気筒６ａ，６ｂ，
６ｃ，６a′，６b′，６c′を構成している。そして、
これら６つの気筒は６ａ−６a′−６ｂ−６b′−６
ｃ−６c′の順に吸気が行われる。従つて、本実施
例においては全気筒が一つの気筒グループとな
る。また、エンジン１の後方には、排気通路１
３，１３′が導かれており、該排気通路１３，１
３′には夫々触媒コンバータ１４，１４′が配置さ
れていると共に、その下流側で両通路１３，１
３′は合流され消音器１５を介して外部に開放さ
れる。更に、１６は両バンク５，５′のほぼ中央
部に位置し、気筒配列方向に延びる共通の排気ガ
ス還流通路であり、該排気還流通路１６には各気
筒の吸気通路１９，１９′に排気ガスを還流する
ための連通孔１８，………１８が形成されてい
る。また、前記排気ガス還流通路１６の端部に還
流制御弁１７を介して排気ガス供給管１６′を経
て排気通路１３′に接続されている。そうして、
上記排気還流通路１６，排気ガス供給管１６′、
還流制御弁１７、連通孔１８………１８とにより
排気ガス還流装置２０を構成している。 As shown in FIG. 2, the cylinders 6, 6' are provided three each along the four directions of the crankshaft, resulting in a total of six cylinders 6a, 6b,
6c, 6a', 6b', and 6c'. and,
These six cylinders are 6a-6a'-6b-6b'-6
Intake is performed in the order of c-6c'. Therefore, in this embodiment, all the cylinders form one cylinder group. In addition, an exhaust passage 1 is located behind the engine 1.
3, 13' are led, and the exhaust passages 13, 1
Catalytic converters 14, 14' are disposed in 3', and both passages 13, 14' are arranged downstream of the catalyst converters 14, 14'.
3' are merged and opened to the outside via a muffler 15. Further, reference numeral 16 is a common exhaust gas recirculation passage located approximately in the center of both banks 5, 5' and extending in the direction of cylinder arrangement. Communication holes 18, . . . 18 for refluxing gas are formed. Further, the end of the exhaust gas recirculation passage 16 is connected to the exhaust passage 13' via a recirculation control valve 17 and an exhaust gas supply pipe 16'. Then,
the exhaust gas recirculation passage 16, the exhaust gas supply pipe 16',
The recirculation control valve 17 and the communication holes 18 constitute an exhaust gas recirculation device 20.
以上の構成において、排気ガス還流通路内１６
の排気ガスの流れは、吸気の量も早い気筒、即ち
気筒６ａ−６a′−６ｂ−６b′−６ｃ−６c′の方向
に流れ、吸気順序と同方向であることから、各気
筒の吸気により、還流ガスの流れが助長され、す
ばやく各気筒に吸入されると共に、排気ガス還流
装置１６内の排気ガスの流れが、とどまることが
ないので、６気筒６c′から１気筒６ａに吸気が移
る際においても、遅れなく１気筒６ａに吸入され
気筒間における排気ガス還流量を一定に保つこと
ができる。 In the above configuration, the exhaust gas recirculation passage 16
The flow of exhaust gas is in the direction of the cylinders where the amount of intake air is faster, that is, the cylinders 6a-6a'-6b-6b'-6c-6c', and since it is in the same direction as the intake order, the intake air from each cylinder is , the flow of recirculated gas is promoted and is quickly sucked into each cylinder, and the flow of exhaust gas in the exhaust gas recirculation device 16 does not stop, so that when the intake air moves from cylinder 6c' to cylinder 1 6a, Even in this case, the exhaust gas is sucked into one cylinder 6a without delay, and the amount of exhaust gas recirculated between the cylinders can be kept constant.
尚、上記実施例においては全気筒の配列方向と
その吸気順序とを同一としたＶ型６気筒エンジン
を示したが、本発明はこれに限定されるものでは
なく、例えば、直列６気筒の様にその吸気順序が
１−４−２−６−３−５となり、必ずしも全気筒
が、配列方向に吸気順序が同一でない場合におい
ても、前３気筒即ち、１−２−３を１つの気筒グ
ループと考えれば本案を適用することができる。 In the above embodiment, a V-type 6-cylinder engine is shown in which the arrangement direction of all cylinders and their intake order are the same, but the present invention is not limited to this. The intake order is 1-4-2-6-3-5, and even if all the cylinders do not necessarily have the same intake order in the arrangement direction, the front three cylinders, 1-2-3, are considered to be one cylinder group. If you think about it, you can apply this proposal.
第１図は本発明の実施例を示すＶ型６気筒エン
ジンの縦断面図、第２図は同じく平面図を示した
ものである。
６，６′…シリンダ、６ａ，６a′，６ｂ，６b′，
６ｃ，６c′…気筒（気筒グループ）、１６…排気
ガス還流通路、１６′…排気ガス供給管、１８…
連通孔、１９，１９′…吸気通路、１３，１３′…
排気通路、２０…排気ガス還流装置。
FIG. 1 is a longitudinal sectional view of a V-type six-cylinder engine showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. 6, 6'...Cylinder, 6a, 6a', 6b, 6b',
6c, 6c'...Cylinder (cylinder group), 16...Exhaust gas recirculation passage, 16'...Exhaust gas supply pipe, 18...
Communication hole, 19, 19'...Intake passage, 13, 13'...
Exhaust passage, 20...exhaust gas recirculation device.
Claims (1)
よつて互いに接続し排気ガスの一部を吸気通路に
還流させるエンジンの排気ガス還流装置におい
て、 気筒配列方向の一端側の気筒から他端側の気筒
に向かつて順次吸気の流入が行なわれるように各
気筒の吸気順序を設定する一方、排気ガス還流通
路を気筒配列方向と同方向に延設するとともに、
該排気ガス還流通路と各吸気通路とを連通する連
通孔を形成し、かつ、上記排気ガス還流通路の上
流端を吸気順序の最も早い気筒に接続したことを
特徴とするエンジンの排気ガス還流装置。[Scope of Claims] 1. In an exhaust gas recirculation device for an engine that connects an intake passage and an exhaust passage to each other by an exhaust gas recirculation passage and recirculates a part of the exhaust gas to the intake passage, The intake order of each cylinder is set so that intake air flows sequentially from the cylinder to the cylinder at the other end, and the exhaust gas recirculation passage is extended in the same direction as the cylinder arrangement direction,
An exhaust gas recirculation device for an engine, characterized in that a communication hole is formed to communicate the exhaust gas recirculation passage with each intake passage, and an upstream end of the exhaust gas recirculation passage is connected to a cylinder having the earliest intake order. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58238632A JPS60128967A (en) | 1983-12-16 | 1983-12-16 | Exhaust gas recirculation mechanism for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58238632A JPS60128967A (en) | 1983-12-16 | 1983-12-16 | Exhaust gas recirculation mechanism for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60128967A JPS60128967A (en) | 1985-07-10 |
| JPH0567781B2 true JPH0567781B2 (en) | 1993-09-27 |
Family
ID=17033023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58238632A Granted JPS60128967A (en) | 1983-12-16 | 1983-12-16 | Exhaust gas recirculation mechanism for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60128967A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6371420U (en) * | 1986-10-30 | 1988-05-13 |
-
1983
- 1983-12-16 JP JP58238632A patent/JPS60128967A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60128967A (en) | 1985-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4744342A (en) | Intake port structure for an internal combustion engine | |
| JPH0567781B2 (en) | ||
| JPH0523823Y2 (en) | ||
| JP3559850B2 (en) | V-type engine | |
| JPH0232857Y2 (en) | ||
| JPH082430Y2 (en) | Intake manifold in internal combustion engine | |
| JPS6246808Y2 (en) | ||
| JPH0354270U (en) | ||
| JPH0329572Y2 (en) | ||
| JPS5922287Y2 (en) | EGR passage device for multi-cylinder internal combustion engine | |
| JPH0540247Y2 (en) | ||
| JP2000161163A (en) | Structure of inertia supercharging intake manifold for multiple cylinder internal combustion engine | |
| JP2888435B2 (en) | Exhaust system for multi-cylinder engine | |
| JPS6139096Y2 (en) | ||
| JPS60178329U (en) | Exhaust system structure of multi-cylinder internal combustion engine | |
| JPH0754604Y2 (en) | Intake device in a three-cylinder internal combustion engine | |
| JP2560393Y2 (en) | Multi-cylinder V-type engine intake system | |
| JPH0147607B2 (en) | ||
| JPS5830118Y2 (en) | Conduit device for exhaust gas purification in internal combustion engines | |
| JPS5918148Y2 (en) | Intake system for multi-cylinder internal combustion engine | |
| JP2615756B2 (en) | Intake device for V-type multi-cylinder internal combustion engine | |
| JPS5829125U (en) | Air supply pipe system for V-8 internal combustion engine | |
| JPH0427764A (en) | Intake device of engine | |
| JPS62141667U (en) | ||
| JPS63289214A (en) | Exhaust device for multi-cylinder engine |