JPH08319900A - Exhaust gas recirculation device of engine - Google Patents
Exhaust gas recirculation device of engineInfo
- Publication number
- JPH08319900A JPH08319900A JP7126210A JP12621095A JPH08319900A JP H08319900 A JPH08319900 A JP H08319900A JP 7126210 A JP7126210 A JP 7126210A JP 12621095 A JP12621095 A JP 12621095A JP H08319900 A JPH08319900 A JP H08319900A
- Authority
- JP
- Japan
- Prior art keywords
- egr gas
- exhaust gas
- egr
- engine
- gas
- 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
- 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
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はエンジンの排気ガス再循
環装置に関する。FIELD OF THE INVENTION The present invention relates to an exhaust gas recirculation system for an engine.
【０００２】[0002]
【従来の技術】従来、自動車用エンジンには、排気ガス
の浄化を目的として、排気ガスの一部を吸気マニホール
ド内に戻し、排気ガス中の窒素酸化物（ＮＯｘ）の低減
を図る排気ガス再循環装置（以下、ＥＧＲ装置と記す）
が設けられたものがある。このＥＧＲ装置では、不活性
ガスである排気ガスを各シリンダ内に戻すことにより燃
焼温度が低減でき、高温で発生する窒素酸化物（ＮＯ
ｘ）の発生を低減できる。この装置において、排気ガス
の一部を吸気マニホールド内に戻すガス（以下、ＥＧＲ
ガスと記す）を用いて、窒素酸化物の一層の低減を図る
には、ＥＧＲガスがエンジンの燃焼室（シリンダ）に入
る前に充分冷却されること、吸気マニホールド内で吸気
された空気とＥＧＲガスが充分に混合されて各シリンダ
内に均等に分配されることが重要である。これらを考慮
したエンジンのＥＧＲ装置は、実開平1−166253 号や実
開平2−35951号公報などが提案されている。2. Description of the Related Art Conventionally, in an automobile engine, a part of exhaust gas is returned to the inside of an intake manifold for the purpose of purifying exhaust gas, and exhaust gas re-purification for reducing nitrogen oxide (NOx) in the exhaust gas is performed. Circulation device (hereinafter referred to as EGR device)
Some have been provided. In this EGR device, the combustion temperature can be reduced by returning exhaust gas, which is an inert gas, into each cylinder, and nitrogen oxides (NO
x) can be reduced. In this device, a gas that returns a part of the exhaust gas into the intake manifold (hereinafter referred to as EGR
Gas), to further reduce nitrogen oxides, the EGR gas must be sufficiently cooled before entering the combustion chamber (cylinder) of the engine, and the air taken in the intake manifold and the EGR It is important that the gases are well mixed and evenly distributed within each cylinder. Engine EGR devices that take these into consideration have been proposed such as Japanese Utility Model Publication No. 1-166253 and Japanese Utility Model Publication No. 2-35951.
【０００３】実開平1−166253 号公報は、サージタンク
内に開口した各気筒の吸気通路吸気口よりも上流のサー
ジタンク内周面に吸入空気の流れ方向と交差する溝を円
周方向に刻設し、溝の側壁面に排気ガスを導入する排気
還流通路の開口部を設け、溝は開口部を挟んでサージタ
ンクの内周面の上下においてその端部がサージタンクの
内周の主壁面に合流するように形成されたエンジンのＥ
ＧＲ装置である。In Japanese Utility Model Laid-Open No. 1-166253, a groove intersecting the flow direction of intake air is circumferentially formed on the inner circumferential surface of the surge tank upstream of the intake passage of each cylinder opened in the surge tank. The opening of the exhaust gas recirculation passage for introducing the exhaust gas is provided on the side wall surface of the groove, and the groove has the ends above and below the inner peripheral surface of the surge tank, and the ends are the main wall surface of the inner circumference of the surge tank Of the engine formed to join the
It is a GR device.
【０００４】また、実開平2−35951号公報は、吸気通路
の排気還流通路接続部の下流側に、断面積を大きくした
吸気通路を設け、その吸気通路内に、吸気と共にＥＧＲ
ガスを内外及び外内方向へ旋回させると共に流線方向か
ら一方及び他方向へ逆旋回させる二つの混合羽根を内外
でかつ前後に設けたディーゼル機関のＥＧＲ装置であ
る。In Japanese Utility Model Laid-Open No. 2-35951, an intake passage having a large cross-sectional area is provided on the downstream side of the exhaust gas recirculation passage connecting portion of the intake passage, and the EGR together with the intake air is provided in the intake passage.
It is an EGR device for a diesel engine in which two mixing blades that swirl gas inward and outward and inward and outward and reversely swirl in one direction and the other direction from the streamline direction are provided inside and outside and in front and rear.
【０００５】[0005]
【発明が解決しようとする課題】従来技術の実開平1−1
66253 号公報は、気筒数が増えたときのＥＧＲガスの気
筒間ばらつきが心配される。また、実開平2−35951号公
報は、気筒間ばらつきは低減されるが、形状が複雑で加
工が難しいためにコスト高になりやすい点があげられ
る。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to Japanese Patent No. 66253, there is a concern that the EGR gas varies among cylinders when the number of cylinders increases. In addition, in Japanese Utility Model Laid-Open No. 2-35951, although variations between cylinders are reduced, the cost is likely to increase because the shape is complicated and the machining is difficult.
【０００６】本発明の目的は、エンジンの燃焼の際に発
生する窒素酸化物の発生を低減することにあり、そのた
めにＥＧＲガスと吸入空気を早期混合しエンジンの気筒
数が増えた場合でもＥＧＲガスの気筒間ばらつき低減を
促進することにある。また、比較的簡単な構造で部品点
数が少なく工作が容易であり、コスト的に有利なエンジ
ンのＥＧＲ装置を提供することにある。An object of the present invention is to reduce the generation of nitrogen oxides generated during combustion of an engine. Therefore, even if the EGR gas and intake air are prematurely mixed and the number of cylinders of the engine is increased, the EGR is also increased. It is to promote the reduction of variations in gas among cylinders. Another object of the present invention is to provide an EGR device for an engine that has a relatively simple structure, has a small number of parts, is easy to machine, and is cost effective.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
の本発明の第１の特徴は、エンジンの排気マニホールド
から排気ガスの一部を吸気マニホールド内へ再循環させ
るためのバイパス管を配設した排気ガス再循環装置にお
いて、前記排気ガスと前記吸気マニホールド内を通過す
る吸入空気を混合させるために前記吸気マニホールド内
に設けられた前記バイパス管と連通する排気ガス戻り孔
を複数設けたことにある。A first feature of the present invention for achieving the above object is to provide a bypass pipe for recirculating a part of exhaust gas from an engine exhaust manifold into an intake manifold. In the exhaust gas recirculation device described above, a plurality of exhaust gas return holes communicating with the bypass pipe provided in the intake manifold for mixing the exhaust gas with the intake air passing through the intake manifold are provided. is there.
【０００８】上記目的を達成するための本発明の第２の
特徴は、本発明の第１の特徴のエンジンの排気ガス再循
環装置において、前記排気ガス戻り孔を吸気マニホール
ド内同一断面内に対向するように配設したことにある。A second feature of the present invention for achieving the above object is that in the exhaust gas recirculation device for an engine according to the first feature of the present invention, the exhaust gas return holes are opposed to each other in the same cross section in the intake manifold. It is arranged to do so.
【０００９】上記目的を達成するための本発明の第３の
特徴は、本発明の第１の特徴のエンジンの排気ガス再循
環装置において、前記排気ガスが前記吸気マニホールド
内を旋回するように前記排気ガス戻り孔を吸気マニホー
ルド内同一断面内に対称に配設したことにある。A third aspect of the present invention for achieving the above object is the exhaust gas recirculation device for an engine according to the first aspect of the present invention, wherein the exhaust gas is swirled in the intake manifold. The exhaust gas return holes are symmetrically arranged in the same cross section in the intake manifold.
【００１０】上記目的を達成するための本発明の第４の
特徴は、エンジンの排気マニホールドから排気ガスの一
部を吸気マニホールド内へ再循環させるためのバイパス
管を配設した排気ガス再循環装置において、前記吸気マ
ニホールド内を流れる吸入空気流れ方向に沿って、段階
的に前記排気ガスと前記吸入空気流れを混合させるため
に前記バイパス管と連通する前記排気ガス戻り孔を複数
配設したことにある。A fourth feature of the present invention for achieving the above object is an exhaust gas recirculation device having a bypass pipe for recirculating a part of exhaust gas from an engine exhaust manifold into an intake manifold. A plurality of exhaust gas return holes communicating with the bypass pipe for mixing the exhaust gas and the intake air flow stepwise along the flow direction of the intake air flowing in the intake manifold. is there.
【００１１】上記目的を達成するための本発明の第５の
特徴は、本発明の第４の特徴のエンジンの排気ガス再循
環装置において、前記排気ガス戻り孔を排気マニホール
ド内同一断面内に対向するように配設したことにある。A fifth feature of the present invention for achieving the above object is that in the exhaust gas recirculation device for an engine according to the fourth feature of the present invention, the exhaust gas return holes are opposed to each other in the same cross section in the exhaust manifold. It is arranged to do so.
【００１２】上記目的を達成するための本発明の第６の
特徴は、本発明の第４の特徴のエンジンの排気ガス再循
環装置において、前記排気ガスが前記吸気マニホールド
内を旋回するように前記排気ガス戻り孔を排気マニホー
ルド内同一断面内に対称に配設したことにある。A sixth aspect of the present invention for achieving the above object is the exhaust gas recirculation device for an engine according to the fourth aspect of the present invention, wherein the exhaust gas is swirled in the intake manifold. The exhaust gas return holes are symmetrically arranged in the same cross section in the exhaust manifold.
【００１３】[0013]
【作用】本発明のエンジンのＥＧＲ装置は、吸気マニホ
ールド内にＥＧＲガス戻り孔を複数設けることにより、
吸気される吸入空気とＥＧＲガスとの接触面積が増加
し、早期混合が促進されＥＧＲガスの気筒間ばらつきの
低減が図られる。また、ＥＧＲガス戻り孔を吸気マニホ
ールド内同一断面内に対向もしくは、対称となるように
配設することにより吸気マニホールド内で吸入空気とＥ
ＧＲガス間で三次元流れが形成でき、さらに吸入空気と
ＥＧＲガスとの早期混合が促進され、EGRガスの気筒間
ばらつきの低減が図られる。In the engine EGR device of the present invention, by providing a plurality of EGR gas return holes in the intake manifold,
The contact area between the intake air that is taken in and the EGR gas is increased, early mixing is promoted, and the variation in EGR gas among the cylinders is reduced. Further, the EGR gas return holes are arranged opposite to each other or symmetrically in the same cross section in the intake manifold, so that the intake air and the E
A three-dimensional flow can be formed between the GR gases, the early mixing of the intake air and the EGR gas is promoted, and the variation of the EGR gas among the cylinders can be reduced.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づき詳細に
説明する。図１は、本発明のエンジン１の排気ガス再循
環（以下、ＥＧＲと記す）装置の概略構成図である。エ
ンジン１では、燃焼に用いられる吸入空気２は、エアフ
ローセンサ３を通過し吸入空気量が計測される。吸入空
気量の調整には、エアフローセンサ３下流に設けられて
いるスロットルバルブ４の開閉により行われる。吸入空
気２は、吸気マニホールド６で分配された後、エンジン
１内で燃焼に用いられ、排気マニホールド５を通過し外
気へ排気される。ここで、ＥＧＲ装置を用いたエンジン
１では、排気される排気ガス７の一部が排気マニホール
ド５下流に設けられたＥＧＲ通路８（バイパス管）に流
入する。流入された排気ガス７の一部は、ＥＧＲガス１
３としてスロットルバルブ４下流に連通されたＥＧＲガ
ス戻り部１０に戻される。ＥＧＲガス量の調整はＥＧＲ
通路８（バイパス管）に設けられたＥＧＲ弁９の開閉に
より行われる。ＥＧＲガス戻り部１０に戻された排気ガ
ス７の一部（以下、ＥＧＲガス１３と記す）は、先述し
た吸入空気２と混合され混合ガス１１となり、吸気マニ
ホールド６を通過した後、エンジン１へと供給される。
ＥＧＲガス１３がエンジン１内へ供給されることによ
り、エンジン１内の燃焼温度を低下でき燃焼時に発生す
る有害物質である窒素酸化物（ＮＯｘ）の低減が図れ
る。ここで、エンジン１の各シリンダへは、ＥＧＲガス
１３が均等に流入する必要がある。さらに、エンジンの
各シリンダ内の燃焼温度を効果的に下げるためには、各
シリンダ内に流入する混合ガス１１の温度ばらつきを少
なくする必要がある。そのための一手段として、吸入空
気２とＥＧＲガス１３との接触面積を増やし効果的に早
期混合させることが考えられる。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of an exhaust gas recirculation (hereinafter referred to as EGR) device of an engine 1 of the present invention. In the engine 1, the intake air 2 used for combustion passes through the air flow sensor 3 and the intake air amount is measured. The intake air amount is adjusted by opening and closing the throttle valve 4 provided downstream of the air flow sensor 3. The intake air 2 is distributed in the intake manifold 6, then used for combustion in the engine 1, passes through the exhaust manifold 5, and is exhausted to the outside air. Here, in the engine 1 using the EGR device, a part of the exhaust gas 7 that is exhausted flows into the EGR passage 8 (bypass pipe) provided downstream of the exhaust manifold 5. A part of the inflowing exhaust gas 7 is the EGR gas 1
3 is returned to the EGR gas return section 10 that is connected to the downstream side of the throttle valve 4. EGR gas amount adjustment is EGR
This is performed by opening and closing the EGR valve 9 provided in the passage 8 (bypass pipe). Part of the exhaust gas 7 returned to the EGR gas return unit 10 (hereinafter referred to as EGR gas 13) is mixed with the intake air 2 described above to form a mixed gas 11, which passes through the intake manifold 6 and then to the engine 1. Supplied with.
By supplying the EGR gas 13 into the engine 1, it is possible to lower the combustion temperature in the engine 1 and to reduce nitrogen oxides (NOx) which are harmful substances generated during combustion. Here, the EGR gas 13 needs to uniformly flow into each cylinder of the engine 1. Further, in order to effectively lower the combustion temperature in each cylinder of the engine, it is necessary to reduce the temperature variation of the mixed gas 11 flowing into each cylinder. As one means for this, it is conceivable to increase the contact area between the intake air 2 and the EGR gas 13 for effective early mixing.
【００１５】次に、図２を用いて、本発明の第１の実施
例を説明する。図２は、本発明の第１の実施例のＥＧＲ
ガス戻り部１０の詳細図である。スロットルバルブ４の
開度により吸入空気量が調整される。ＥＧＲガス戻り部
１０は、スロットルバルブ４の下流に設けられている。
ＥＧＲガス戻り部１０には、ＥＧＲガス１３の通路であ
るＥＧＲ通路８が連通されている。その接続部分である
ＥＧＲガス１３の流出孔をＥＧＲガス戻り孔１２とす
る。本実施例の場合ＥＧＲガス戻り孔１２は、少なくと
も二つ（本実施例では、四つである）設けてある。さら
に、同一断面内に対向するように配設されている。この
ため、吸入空気２とＥＧＲガス１３との接触面積が増加
する。よって、吸入空気２とＥＧＲガス１３の両流体が
一層撹拌される。以上により、両流体は、早期混合が促
進され良質の混合ガス１１が生成されることになる。よ
って、ＥＧＲガス１３の気筒間ばらつきの低減が促進さ
れることになる。Next, a first embodiment of the present invention will be described with reference to FIG. FIG. 2 shows the EGR of the first embodiment of the present invention.
3 is a detailed view of the gas return unit 10. FIG. The intake air amount is adjusted by the opening degree of the throttle valve 4. The EGR gas return unit 10 is provided downstream of the throttle valve 4.
An EGR passage 8 that is a passage for the EGR gas 13 is connected to the EGR gas return section 10. The outflow hole of the EGR gas 13 which is the connecting portion is referred to as the EGR gas return hole 12. In this embodiment, at least two EGR gas return holes 12 are provided (four in this embodiment). Further, they are arranged so as to face each other in the same cross section. Therefore, the contact area between the intake air 2 and the EGR gas 13 increases. Therefore, both the intake air 2 and the EGR gas 13 are further stirred. As described above, the early mixing of both fluids is promoted, and the high-quality mixed gas 11 is generated. Therefore, the reduction of the variation of the EGR gas 13 between the cylinders is promoted.
【００１６】さらに、図３を用いて、本発明の第２の実
施例を説明する。図３は、本発明の第２の実施例のＥＧ
Ｒガス戻り部１０の詳細図である。本実施例の場合、吸
入空気量の調整、ＥＧＲガス戻り部１０の取り付け場所
等は、本発明の第１の実施例と同様である。本実施例で
は、ＥＧＲガス戻り孔１２を二つ設け、吸入空気流れに
対し所定の角度を持たせ、ＥＧＲガスが吸気マニホール
ド内で旋回するようにＥＧＲガス戻り孔１２を同一断面
内に対称に配設されている。このため、本発明の第１の
実施例と同様に吸入空気２とＥＧＲガス１３との接触面
積が増加するとともに吸入空気２とＥＧＲガス１３の両
流体が一層撹拌される。さらに、本実施例の場合、ＥＧ
Ｒガス戻り孔１２は、ＥＧＲガス１３が旋回するように
ＥＧＲガス戻り孔１２が対称に配設されており、本発明
の第１の実施例以上に吸入空気２とＥＧＲガス１３の両
流体が一層撹拌される。以上により、両流体は、早期混
合が促進され良質の混合ガス１１が生成されることにな
る。よって、ＥＧＲガス１３の気筒間ばらつきの低減が
促進されることになる。Further, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 shows the EG of the second embodiment of the present invention.
3 is a detailed view of the R gas return unit 10. FIG. In the case of the present embodiment, the adjustment of the intake air amount, the mounting location of the EGR gas return portion 10 and the like are the same as in the first embodiment of the present invention. In the present embodiment, two EGR gas return holes 12 are provided to have a predetermined angle with respect to the intake air flow, and the EGR gas return holes 12 are symmetrically arranged in the same cross section so that the EGR gas swirls in the intake manifold. It is arranged. Therefore, as in the first embodiment of the present invention, the contact area between the intake air 2 and the EGR gas 13 increases, and both the intake air 2 and the EGR gas 13 are further stirred. Further, in the case of this embodiment, EG
In the R gas return hole 12, the EGR gas return holes 12 are symmetrically arranged so that the EGR gas 13 swirls, and both the intake air 2 and the EGR gas 13 fluids are provided more than in the first embodiment of the present invention. Stir further. As described above, the early mixing of both fluids is promoted, and the high-quality mixed gas 11 is generated. Therefore, the reduction of the variation of the EGR gas 13 between the cylinders is promoted.
【００１７】さらに、図４を用いて、本発明の第２の実
施例を説明する。図４は、本発明の第３の実施例のＥＧ
Ｒガス戻り部１０の詳細図である。本実施例の場合、吸
入空気量の調整、ＥＧＲガス戻り部１０の取り付け場所
等は、本発明の第１の実施例と同様である。本実施例で
は、ＥＧＲガス戻り孔１２を四つ設け、吸入空気流れに
対し所定の角度を持たせ、ＥＧＲガスが吸気マニホール
ド内で旋回するようにＥＧＲガス戻り孔１２を同一断面
内に対称に配設されている。このため、本発明の第１の
実施例と同様に吸入空気２とＥＧＲガス１３との接触面
積が増加するために吸入空気２とＥＧＲガス１３の両流
体が一層撹拌される。さらに、本実施例の場合、ＥＧＲ
ガス戻り孔１２は、ＥＧＲガス１３が旋回するようにＥ
ＧＲガス戻り孔１２が対称に配設されており、本発明の
第１の実施例以上に吸入空気２とＥＧＲガス１３の両流
体が一層撹拌される。以上により、両流体は、早期混合
が促進され良質の混合ガス１１が生成されることにな
る。よって、ＥＧＲガス１３の気筒間ばらつきの低減が
促進されることになる。Further, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows the EG of the third embodiment of the present invention.
3 is a detailed view of the R gas return unit 10. FIG. In the case of the present embodiment, the adjustment of the intake air amount, the mounting location of the EGR gas return portion 10 and the like are the same as in the first embodiment of the present invention. In the present embodiment, four EGR gas return holes 12 are provided to have a predetermined angle with respect to the intake air flow, and the EGR gas return holes 12 are symmetrical in the same cross section so that the EGR gas swirls in the intake manifold. It is arranged. Therefore, as in the first embodiment of the present invention, the contact area between the intake air 2 and the EGR gas 13 increases, so that both fluids of the intake air 2 and the EGR gas 13 are further stirred. Further, in the case of this embodiment, EGR
The gas return hole 12 is provided with E so that the EGR gas 13 swirls.
The GR gas return holes 12 are symmetrically arranged, and both the intake air 2 and the EGR gas 13 fluids are further stirred as compared with the first embodiment of the present invention. As described above, the early mixing of both fluids is promoted, and the high-quality mixed gas 11 is generated. Therefore, the reduction of the variation of the EGR gas 13 between the cylinders is promoted.
【００１８】さらに、図５を用いて、本発明の第４の実
施例を説明する。図５は、本発明の第４の実施例のＥＧ
Ｒガス戻り部１０の詳細図である。本実施例の場合、吸
入空気量の調整、ＥＧＲガス戻り部１０の取り付け場所
等は、本発明の第１の実施例と同様である。また、ＥＧ
Ｒガス１３の流れもほぼ同様である。しかし、本発明の
第１の実施例との相違は、ＥＧＲガス戻り部１０の構成
にある。すなわち、ＥＧＲ通路８（バイパス管）とＥＧ
Ｒガス戻り孔１２との間にＥＧＲガス１３をＥＧＲガス
戻り孔１２より均等に分配するためのＥＧＲガス分配室
１４を設けたことにある。これにより、ＥＧＲガス１３
の流れるＥＧＲ通路８（バイパス管）を一つにできると
ともにＥＧＲガス戻り孔１２より噴出されるＥＧＲガス
１３を均等に吸入空気流れと接触させることが可能とな
る。また、吸入空気２とＥＧＲガス１３の流れ方は、本
発明の第１の実施例と同様である。したがって、両流体
は、早期混合が促進され良質の混合ガス１１が生成され
ることになる。よって、ＥＧＲガス１３の気筒間ばらつ
きの低減が促進されることになる。Further, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 shows the EG of the fourth embodiment of the present invention.
3 is a detailed view of the R gas return unit 10. FIG. In the case of the present embodiment, the adjustment of the intake air amount, the mounting location of the EGR gas return portion 10 and the like are the same as in the first embodiment of the present invention. Also, EG
The flow of the R gas 13 is almost the same. However, the difference from the first embodiment of the present invention lies in the configuration of the EGR gas return section 10. That is, the EGR passage 8 (bypass pipe) and the EG
An EGR gas distribution chamber 14 for evenly distributing the EGR gas 13 from the EGR gas return hole 12 is provided between the EGR gas return hole 12 and the R gas return hole 12. As a result, the EGR gas 13
The EGR passage 8 (bypass pipe) that flows through can be unified, and the EGR gas 13 ejected from the EGR gas return hole 12 can be uniformly contacted with the intake air flow. Further, the way in which the intake air 2 and the EGR gas 13 flow is the same as in the first embodiment of the present invention. Therefore, early mixing of both fluids is promoted and a high-quality mixed gas 11 is generated. Therefore, the reduction of the variation of the EGR gas 13 between the cylinders is promoted.
【００１９】さらに、図６を用いて、本発明の第５の実
施例を説明する。図６は、本発明の第５の実施例のＥＧ
Ｒガス戻り部１０の詳細図である。本実施例は、先述し
た本発明の第４の実施例とほぼ同様の構成をしており、
ＥＧＲガス分配室１４を配設している。第４の実施例と
の相違はスロットルバルブ４下流に配設させているＥＧ
Ｒガス戻り孔１２が吸入空気流れに沿って任意の間隔で
複数配設されている。これにより、先述した各実施例以
上に吸入空気２の流れとＥＧＲガス１３との接触面積が
増加すると共に吸気流れが撹拌されて吸入空気２の流れ
とＥＧＲガス１３との早期混合が促進されることにな
る。Further, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 shows the EG of the fifth embodiment of the present invention.
3 is a detailed view of the R gas return unit 10. FIG. This embodiment has substantially the same configuration as the above-described fourth embodiment of the present invention.
An EGR gas distribution chamber 14 is provided. The difference from the fourth embodiment is that the EG is arranged downstream of the throttle valve 4.
A plurality of R gas return holes 12 are arranged at arbitrary intervals along the intake air flow. As a result, the contact area between the flow of the intake air 2 and the EGR gas 13 is increased more than in the above-described respective embodiments, the intake flow is agitated, and the early mixing of the flow of the intake air 2 and the EGR gas 13 is promoted. It will be.
【００２０】さらに、図７を用いて、本発明の第６の実
施例を説明する。図７は、本発明の第６の実施例のＥＧ
Ｒガス戻り部１０の詳細図である。本実施例は、先述し
た本発明の第５の実施例とほぼ同様の構成をしており、
ＥＧＲガス分配室１４を配設している。第５の実施例と
の相違は、ＥＧＲガス戻り孔１２をＥＧＲガス１３が旋
回するように対称に配設したことにある。これにより、
先述した各実施例以上に吸気流れとＥＧＲガス１３との
接触面積が増加すると共に吸気流れが撹拌されて吸気流
れとＥＧＲガス１３との早期混合が促進されることにな
る。Further, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows the EG of the sixth embodiment of the present invention.
3 is a detailed view of the R gas return unit 10. FIG. This embodiment has almost the same configuration as the fifth embodiment of the present invention described above.
An EGR gas distribution chamber 14 is provided. The difference from the fifth embodiment is that the EGR gas return holes 12 are symmetrically arranged so that the EGR gas 13 swirls. This allows
The contact area between the intake flow and the EGR gas 13 increases more than in the above-described respective embodiments, and the intake flow is agitated to promote early mixing of the intake flow and the EGR gas 13.
【００２１】以上、これら本発明の各実施例の効果をま
とめれば吸入空気２とＥＧＲガス１３との接触面積が増
加し、また、旋回流のような三次元流れが吸気管内に発
生することによりＥＧＲガス１３と吸入空気２との早期
混合が促進される。よって、ＥＧＲガス１３の気筒間ば
らつきの低減が図れる。さらに、比較的簡単な構造であ
るために部品点数が少なく工作が容易であるためにコス
ト的に有利である。As described above, if the effects of the respective embodiments of the present invention are summarized, the contact area between the intake air 2 and the EGR gas 13 increases, and a three-dimensional flow such as a swirling flow is generated in the intake pipe. The early mixing of the EGR gas 13 and the intake air 2 is promoted. Therefore, it is possible to reduce the variation in the EGR gas 13 between the cylinders. Further, since the structure is relatively simple, the number of parts is small and the work is easy, which is advantageous in terms of cost.
【００２２】[0022]
【発明の効果】本発明の効果は、スロットルバルブ下流
吸気マニホールド内でＥＧＲガスを噴出するＥＧＲガス
戻り孔を複数設けることにより、吸入空気とＥＧＲガス
との接触面積を増やし、さらに、吸入空気流れ中に旋回
流のような三次元流れを形成することにより、ＥＧＲガ
スと吸入空気との早期混合が促進されＥＧＲガスの気筒
間ばらつきの低減を促進でき、エンジンの燃焼時に発生
するＮＯｘを低減できる。また、比較的簡単な構造であ
るために部品点数が少なく工作が容易であるためにコス
ト的に有利である。The effect of the present invention is to increase the contact area between intake air and EGR gas by providing a plurality of EGR gas return holes for ejecting EGR gas in the throttle valve downstream intake manifold, and further to increase the intake air flow. By forming a three-dimensional flow like a swirling flow in the inside, early mixing of EGR gas and intake air is promoted, reduction of inter-cylinder variation of EGR gas can be promoted, and NOx generated during engine combustion can be reduced. . Further, since the structure is relatively simple, the number of parts is small and the work is easy, which is advantageous in terms of cost.
【図１】本発明の排気ガス再循環装置（ＥＧＲ装置）を
用いたエンジンの説明図。FIG. 1 is an explanatory diagram of an engine using an exhaust gas recirculation device (EGR device) of the present invention.
【図２】本発明の第１の実施例のＥＧＲガス戻り部の説
明図。FIG. 2 is an explanatory diagram of an EGR gas return unit according to the first embodiment of this invention.
【図３】本発明の第２の実施例のＥＧＲガス戻り部の説
明図。FIG. 3 is an explanatory diagram of an EGR gas return unit according to a second embodiment of the present invention.
【図４】本発明の第３の実施例のＥＧＲガス戻り部の説
明図。FIG. 4 is an explanatory diagram of an EGR gas returning section according to a third embodiment of the present invention.
【図５】本発明の第４の実施例のＥＧＲガス戻り部の説
明図。FIG. 5 is an explanatory diagram of an EGR gas return unit according to a fourth embodiment of the present invention.
【図６】本発明の第５の実施例のＥＧＲガス戻り部の説
明図。FIG. 6 is an explanatory diagram of an EGR gas returning section according to a fifth embodiment of the present invention.
【図７】本発明の第６の実施例のＥＧＲガス戻り部の説
明図。FIG. 7 is an explanatory diagram of an EGR gas returning section according to a sixth embodiment of the present invention.
２…吸入空気、４…スロットルバルブ、８…ＥＧＲ通
路、１０…ＥＧＲガス戻り部、１１…混合ガス、１２…
ＥＧＲガス戻り孔、１３…ＥＧＲガス。2 ... Intake air, 4 ... Throttle valve, 8 ... EGR passage, 10 ... EGR gas return section, 11 ... Mixed gas, 12 ...
EGR gas return hole, 13 ... EGR gas.
Claims (6)
の一部を吸気マニホールド内へ再循環させるためのバイ
パス管を配設した排気ガス再循環装置において、前記排
気ガスと前記吸気マニホールド内を通過する吸入空気を
混合させるために前記吸気マニホールド内に設けられた
前記バイパス管と連通する排気ガス戻り孔を複数設けた
ことを特徴とするエンジンの排気ガス再循環装置。1. An exhaust gas recirculation device having a bypass pipe for recirculating a part of exhaust gas from an engine exhaust manifold into an intake manifold, the intake gas passing through the exhaust gas and the intake manifold. An exhaust gas recirculation apparatus for an engine, comprising a plurality of exhaust gas return holes communicating with the bypass pipe provided in the intake manifold for mixing air.
前記吸気マニホールド内同一断面内に対向するように配
設したエンジンの排気ガス再循環装置。2. The exhaust gas recirculation device for an engine according to claim 1, wherein the exhaust gas return holes are arranged so as to face each other in the same cross section in the intake manifold.
気マニホールド内を旋回するように前記排気ガス戻り孔
を吸気マニホールド内同一断面内に対称に配設したエン
ジンの排気ガス再循環装置。3. The exhaust gas recirculation device for an engine according to claim 1, wherein the exhaust gas return holes are symmetrically arranged in the same cross section in the intake manifold so that the exhaust gas swirls in the intake manifold.
の一部を吸気マニホールド内へ再循環させるためのバイ
パス管を配設した排気ガス再循環装置において、前記吸
気マニホールド内を流れる吸入空気流れ方向に沿って、
段階的に前記排気ガスと前記吸入空気流れを混合させる
ために前記バイパス管と連通する前記排気ガス戻り孔を
吸入空気流れに沿って複数配設したエンジンの排気ガス
再循環装置。4. An exhaust gas recirculation device having a bypass pipe for recirculating a part of exhaust gas from an exhaust manifold of an engine into the intake manifold, along an intake air flow direction flowing in the intake manifold. hand,
An exhaust gas recirculation device for an engine, wherein a plurality of the exhaust gas return holes communicating with the bypass pipe are provided along the intake air flow in order to mix the exhaust gas and the intake air flow stepwise.
排気マニホールド内同一断面内に対向するように配設し
たエンジンの排気ガス再循環装置。5. The exhaust gas recirculation device for an engine according to claim 4, wherein the exhaust gas return holes are arranged so as to face each other in the same cross section in the exhaust manifold.
気マニホールド内を旋回するように前記排気ガス戻り孔
を排気マニホールド内同一断面内に対称に配設したエン
ジンの排気ガス再循環装置。6. The exhaust gas recirculation device for an engine according to claim 4, wherein the exhaust gas return holes are symmetrically arranged in the same cross section in the exhaust manifold so that the exhaust gas swirls in the intake manifold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7126210A JPH08319900A (en) | 1995-05-25 | 1995-05-25 | Exhaust gas recirculation device of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7126210A JPH08319900A (en) | 1995-05-25 | 1995-05-25 | Exhaust gas recirculation device of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08319900A true JPH08319900A (en) | 1996-12-03 |
Family
ID=14929455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7126210A Pending JPH08319900A (en) | 1995-05-25 | 1995-05-25 | Exhaust gas recirculation device of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08319900A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003504555A (en) * | 1999-07-15 | 2003-02-04 | フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High temperature fluid flow conduit in hollow structure |
| JP2003510503A (en) * | 1999-09-24 | 2003-03-18 | フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High temperature fluid flow conduit in hollow structure |
| JP2005344514A (en) * | 2004-05-31 | 2005-12-15 | Kazuo Motochi | Auxiliary gas supply device for combustion engine |
| FR2877992A1 (en) * | 2004-11-16 | 2006-05-19 | Renault Sas | Exhaust gas recirculation system for internal combustion engine, has rectilinear portions sized to obtain exhaust gas flows which collide partially in central zone of air intake conduit and create rotational movements of gas around zone |
| FR2895028A1 (en) * | 2005-12-20 | 2007-06-22 | Renault Sas | Fluid e.g. exhaust gas/fresh air, mixing device for power train circuit, has secondary duct with section connected to main and branch ducts so that air and gas are mixed, and flap moved between closed/open positions to close/open orifice |
| JP2011501024A (en) * | 2007-10-18 | 2011-01-06 | アー・ファウ・エル・リスト・ゲー・エム・ベー・ハー | Internal combustion engine having intake system |
| CN102182586A (en) * | 2011-04-29 | 2011-09-14 | 奇瑞汽车股份有限公司 | ERG (exhaust gas recirculation) mixer |
| JP2015124761A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| JP2015124744A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| JP2015124760A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| US20180266366A1 (en) * | 2017-03-15 | 2018-09-20 | Ford Global Technologies, Llc | Exhaust gas recirculation mixer |
-
1995
- 1995-05-25 JP JP7126210A patent/JPH08319900A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003504555A (en) * | 1999-07-15 | 2003-02-04 | フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High temperature fluid flow conduit in hollow structure |
| JP2003510503A (en) * | 1999-09-24 | 2003-03-18 | フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High temperature fluid flow conduit in hollow structure |
| JP2005344514A (en) * | 2004-05-31 | 2005-12-15 | Kazuo Motochi | Auxiliary gas supply device for combustion engine |
| FR2877992A1 (en) * | 2004-11-16 | 2006-05-19 | Renault Sas | Exhaust gas recirculation system for internal combustion engine, has rectilinear portions sized to obtain exhaust gas flows which collide partially in central zone of air intake conduit and create rotational movements of gas around zone |
| FR2895028A1 (en) * | 2005-12-20 | 2007-06-22 | Renault Sas | Fluid e.g. exhaust gas/fresh air, mixing device for power train circuit, has secondary duct with section connected to main and branch ducts so that air and gas are mixed, and flap moved between closed/open positions to close/open orifice |
| JP2011501024A (en) * | 2007-10-18 | 2011-01-06 | アー・ファウ・エル・リスト・ゲー・エム・ベー・ハー | Internal combustion engine having intake system |
| CN102182586A (en) * | 2011-04-29 | 2011-09-14 | 奇瑞汽车股份有限公司 | ERG (exhaust gas recirculation) mixer |
| JP2015124761A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| JP2015124744A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| JP2015124760A (en) * | 2013-12-27 | 2015-07-06 | 大豊工業株式会社 | Gas mixing device |
| US20180266366A1 (en) * | 2017-03-15 | 2018-09-20 | Ford Global Technologies, Llc | Exhaust gas recirculation mixer |
| US10408169B2 (en) * | 2017-03-15 | 2019-09-10 | Ford Global Technologies, Llc | Exhaust gas recirculation mixer |
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