JPH07247917A - Structure of exhaust reflux passage of engine - Google Patents
Structure of exhaust reflux passage of engineInfo
- Publication number
- JPH07247917A JPH07247917A JP6034847A JP3484794A JPH07247917A JP H07247917 A JPH07247917 A JP H07247917A JP 6034847 A JP6034847 A JP 6034847A JP 3484794 A JP3484794 A JP 3484794A JP H07247917 A JPH07247917 A JP H07247917A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- intake
- exhaust gas
- gas recirculation
- control valve
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- 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
- F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、エンジンの排気還流
通路の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an engine exhaust gas recirculation passage.
【０００２】[0002]
【従来の技術】エンジンの燃費向上とＮＯｘを低減する
ために、排気の一部を吸気系に還流する排気還流（ＥＧ
Ｒ）装置を備えると共に、低速時から安定した燃焼を得
るために、吸気通路にスワールコントロールバルブを備
えて、燃焼室に適度なスワール（旋回流）を生起するも
のがある。2. Description of the Related Art Exhaust gas recirculation (EG) that recirculates a portion of exhaust gas to an intake system in order to improve engine fuel economy and reduce NOx.
R) is provided and a swirl control valve is provided in the intake passage in order to obtain stable combustion even at low speeds, and an appropriate swirl (swirl flow) is generated in the combustion chamber.
【０００３】この排気還流装置は、排気通路と吸気通路
との間にこれらを接続する排気還流通路を備え、排気通
路の排気の一部を排気還流通路を通して吸気通路に導い
て、燃焼室に吸入させるようになっている。This exhaust gas recirculation system is provided with an exhaust gas recirculation passage that connects the exhaust gas passage and the intake air passage to each other, and guides a part of the exhaust gas in the exhaust gas passage to the intake air passage through the exhaust gas recirculation passage to be sucked into the combustion chamber. It is designed to let you.
【０００４】スワールコントロールバルブには所定の切
欠部を設けてあり、スワールコントロールバルブを閉じ
たときに、その切欠部のみから吸気を流入させること
で、燃焼室に吸入される吸気の流速を高めて、スワール
を生起するようになっている（実開昭６１ー１７４６５
号公報等参照）。The swirl control valve is provided with a predetermined cutout portion, and when the swirl control valve is closed, the intake air is introduced only through the cutout portion to increase the flow velocity of the intake air taken into the combustion chamber. , Swirl is generated (Actual exploitation 61-17465)
No.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来装置にあっては、排気還流通路をスワールコン
トロールバルブの切欠部下流の吸気通路に開口させてお
り、このため切欠部を通過した吸気の流れが、排気還流
通路からの排気（ＥＧＲガス）によって乱されてしま
う。However, in such a conventional device, the exhaust gas recirculation passage is opened to the intake passage downstream of the cutout portion of the swirl control valve, and therefore the intake air passing through the cutout portion is exhausted. The flow is disturbed by the exhaust gas (EGR gas) from the exhaust gas recirculation passage.
【０００６】したがって、ＥＧＲ量が多くなるほどスワ
ールが弱まり、ＥＧＲガスと新気とのミキシング状態が
安定しないこと等から、ＥＧＲに必要な急速安定燃焼を
達成しにくいという問題があった。Therefore, the swirl becomes weaker as the EGR amount increases, and the mixing state of the EGR gas and the fresh air becomes unstable. Therefore, there is a problem that it is difficult to achieve the rapid stable combustion required for EGR.
【０００７】また、スワールコントロールバルブの切欠
部を通過した吸気の流れが吸気通路中心に対して切欠部
側に偏流させられるため、吸気ポート内壁に燃料が付着
しやすいという問題があった。Further, since the flow of intake air that has passed through the cutout portion of the swirl control valve is biased to the cutout portion side with respect to the center of the intake passage, there is a problem that fuel tends to adhere to the inner wall of the intake port.
【０００８】一方、排気還流通路を排気通路からエンジ
ンの外側を通して吸気通路に接続しているので、構造が
複雑になり、レイアウト上の制約も多い。また、外気に
より排気還流通路内のガス温が低下して、カーボン等が
堆積しやすいという問題があった。On the other hand, since the exhaust gas recirculation passage is connected to the intake passage from the exhaust passage through the outside of the engine, the structure becomes complicated and there are many layout restrictions. Further, there is a problem that the gas temperature in the exhaust gas recirculation passage decreases due to the outside air, and carbon or the like is likely to accumulate.
【０００９】この発明は、このような問題点を解決する
ことを目的としている。The object of the present invention is to solve such a problem.
【００１０】[0010]
【課題を解決するための手段】第１の発明は、吸気通路
に切欠部を有するスワールコントロールバルブを備える
と共に、吸気通路を介してシリンダ内に排気の一部を供
給する排気還流通路を備えたエンジンにおいて、シリン
ダヘッドを貫通する排気還流通路をスワールコントロー
ルバルブよりも上流にて吸気通路に開口すると共に、排
気還流通路をスワールコントロールバルブの切欠部側の
吸気通路外壁に沿わせて形成する。A first aspect of the invention includes a swirl control valve having a cutout portion in an intake passage and an exhaust gas recirculation passage for supplying a part of exhaust gas into a cylinder through the intake passage. In the engine, an exhaust gas recirculation passage that penetrates the cylinder head is opened in the intake passage upstream of the swirl control valve, and the exhaust gas recirculation passage is formed along the outer wall of the intake passage on the cutout side of the swirl control valve.
【００１１】第２の発明は、前記排気還流通路を吸気通
路とスワールコントロールバルブの切欠部中心を結ぶ線
上に設ける。According to a second aspect of the present invention, the exhaust gas recirculation passage is provided on a line connecting the intake passage and the center of the cutout portion of the swirl control valve.
【００１２】第３の発明は、前記排気還流通路をスワー
ルコントロールバルブの切欠部に対応した弧状の長穴形
状に形成する。According to a third aspect of the present invention, the exhaust gas recirculation passage is formed in an arcuate elongated hole shape corresponding to the cutout portion of the swirl control valve.
【００１３】[0013]
【作用】排気還流通路からのＥＧＲガスは、スワールコ
ントロールバルブの上流にて新気と合流され、スワール
コントロールバルブの切欠部を通って（バルブが閉じて
いるとき）燃焼室に吸入される一方、このスワールコン
トロールバルブ付近から燃焼室に吸入されるまでの吸気
およびその間の吸気通路が、排気還流通路を通るＥＧＲ
ガスの熱によって加熱される。The EGR gas from the exhaust gas recirculation passage merges with fresh air upstream of the swirl control valve and is sucked into the combustion chamber through the notch of the swirl control valve (when the valve is closed). The intake air from the vicinity of the swirl control valve until it is taken into the combustion chamber and the intake passage therebetween are EGR passing through the exhaust gas recirculation passage.
It is heated by the heat of gas.
【００１４】したがって、吸気の流れが乱されることは
なく、要求のスワールが生起され、ＥＧＲガスと新気と
の安定したミキシング状態が得られると共に、吸気ポー
ト内壁に付着した燃料の気化が十分に促進される。Therefore, the flow of intake air is not disturbed, the required swirl is generated, a stable mixing state of EGR gas and fresh air is obtained, and the fuel adhering to the inner wall of the intake port is sufficiently vaporized. Be promoted to.
【００１５】排気還流通路をシリンダヘッドを貫通して
形成すれば、エンジン外部に露出する部分が少なくな
り、外気によるガス温の低下が防止される。また、構造
が簡素化し、良好なレイアウト性が確保される。If the exhaust gas recirculation passage is formed so as to penetrate the cylinder head, the portion exposed to the outside of the engine is reduced, and the decrease in gas temperature due to the outside air is prevented. Further, the structure is simplified, and good layout property is secured.
【００１６】また、排気還流通路を吸気通路とスワール
コントロールバルブの切欠部中心を結ぶ線上に設ける
と、燃焼室に吸入される吸気の流れに最も近くなって、
吸気ポート内壁に付着した燃料の気化が一層促進され
る。If the exhaust gas recirculation passage is provided on the line connecting the intake passage and the center of the notch of the swirl control valve, the exhaust gas recirculation passage comes closest to the flow of intake air taken into the combustion chamber.
Vaporization of the fuel adhering to the inner wall of the intake port is further promoted.
【００１７】また、排気還流通路をスワールコントロー
ルバルブの切欠部に対応した弧状の長穴形状に形成すれ
ば、大きな伝熱面積が得られる。If the exhaust gas recirculation passage is formed in an arcuate elongated hole shape corresponding to the cutout portion of the swirl control valve, a large heat transfer area can be obtained.
【００１８】[0018]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図１、図２において、１０はスワールコン
トロールバルブ、１１は吸気通路、１２はシリンダの燃
焼室、１３は排気通路を示す。1 and 2, 10 is a swirl control valve, 11 is an intake passage, 12 is a combustion chamber of a cylinder, and 13 is an exhaust passage.
【００２０】吸気集合部（図示しない）から分岐される
吸気通路１１には、燃焼室１２に２つの吸気ポート１４
が開口、形成され、それぞれに吸気弁１５が設けられ
る。In the intake passage 11 branched from the intake collecting portion (not shown), two intake ports 14 are provided in the combustion chamber 12.
Are opened and formed, and an intake valve 15 is provided in each.
【００２１】吸気通路１１の断面形状は、所定途中（ス
ワールコントロールバルブ１０の上流）から吸気ポート
１４にかけて長円形状に形成される。The cross-sectional shape of the intake passage 11 is formed in an oval shape from a predetermined point (upstream of the swirl control valve 10) to the intake port 14.
【００２２】スワールコントロールバルブ１０は、吸気
通路１１にシリンダヘッド１６の近くに配設され、バル
ブ１０の長円方向に設けられる回転軸１７を介して回動
可能に支持される。The swirl control valve 10 is disposed in the intake passage 11 near the cylinder head 16 and is rotatably supported via a rotary shaft 17 provided in the elliptical direction of the valve 10.
【００２３】スワールコントロールバルブ１０には、図
３のようにその回転軸１７より上方に、かつ吸気通路１
１の中心（重心）Ｇｐより側方に位置して、所定の切欠
部１８が形成される。As shown in FIG. 3, the swirl control valve 10 has an intake passage 1 above the rotary shaft 17 thereof.
A predetermined notch 18 is formed at a position lateral to the center (center of gravity) Gp of 1.
【００２４】回転軸１７は、エンジンの運転条件に基づ
いて駆動されるダイヤフラム式アクチュエータ（図示し
ない）等に連結され、低速域等にスワールコントロール
バルブ１０は閉じられる。The rotary shaft 17 is connected to a diaphragm type actuator (not shown) which is driven based on the operating conditions of the engine, and the swirl control valve 10 is closed in a low speed range or the like.
【００２５】排気通路１３には、燃焼室１２に２つの排
気ポート１９が開口、形成され、それぞれに排気弁２０
が設けられる。In the exhaust passage 13, two exhaust ports 19 are opened and formed in the combustion chamber 12, and an exhaust valve 20 is provided in each of them.
Is provided.
【００２６】排気通路１３と吸気通路１１とを接続する
排気還流通路２１は、排気側からシリンダヘッド１６を
貫通して設けられる。An exhaust gas recirculation passage 21 connecting the exhaust passage 13 and the intake passage 11 is provided so as to penetrate the cylinder head 16 from the exhaust side.
【００２７】排気還流通路２１は、排気通路１３の外壁
に沿い、排気弁口２３、吸気弁口２４の近傍を通り、ス
ワールコントロールバルブ１０の上流まで、バルブ１０
の切欠部１８側に位置する吸気通路１１の外壁に沿って
設けられる。The exhaust gas recirculation passage 21 passes along the outer wall of the exhaust passage 13 and near the exhaust valve opening 23 and the intake valve opening 24, and reaches the upstream side of the swirl control valve 10 up to the valve 10.
It is provided along the outer wall of the intake passage 11 located on the notch 18 side.
【００２８】この場合、吸気通路１１の断面に対して、
図４のように吸気通路１１の中心Ｇｐと見かけ上の切欠
部１８の中心とを結ぶ線上に排気還流通路２１が位置す
るように設けると良い。In this case, with respect to the cross section of the intake passage 11,
As shown in FIG. 4, it is preferable that the exhaust gas recirculation passage 21 be located on a line connecting the center Gp of the intake passage 11 and the center of the apparent cutout portion 18.
【００２９】シリンダヘッド１６の貫通部分は、鋳造に
より、または鋳造後、穴加工により形成される。２５は
ウォータジャケット部分を示す。The penetrating portion of the cylinder head 16 is formed by casting, or by forming a hole after casting. Reference numeral 25 indicates a water jacket portion.
【００３０】排気還流通路２１の上流側は、排気通路１
３の集合部に接続され、その途中にＥＧＲ制御弁（図示
しない）が設けられる。排気還流通路２１の下流側は、
スワールコントロールバルブ１０の上流にて吸気通路１
１（吸気集合部でも良い）に開口、接続される。The upstream side of the exhaust gas recirculation passage 21 has the exhaust passage 1
The EGR control valve (not shown) is provided in the middle of the connection. The downstream side of the exhaust gas recirculation passage 21 is
Intake passage 1 upstream of swirl control valve 10
1 (which may be the intake collecting portion) is opened and connected.
【００３１】シリンダヘッド１６の外部の排気還流通路
部分は、それぞれ排気通路１３、吸気通路１１と一体形
成される。Exhaust gas recirculation passage portions outside the cylinder head 16 are integrally formed with the exhaust passage 13 and the intake passage 11, respectively.
【００３２】前記ＥＧＲ制御弁は、エンジンの運転条件
に基づいて駆動制御され、部分負荷域等に排気還流が行
われる。The EGR control valve is drive-controlled based on the operating conditions of the engine, and exhaust gas recirculation is performed in a partial load range or the like.
【００３３】このような構成のため、スワールコントロ
ールバルブ１０が閉じられているときは、吸気通路１１
の吸気はその切欠部１８を通り、流速を高めて、一方の
吸気ポート１４から燃焼室１２に吸入される。Due to this structure, when the swirl control valve 10 is closed, the intake passage 11 is closed.
The intake air passes through the cutout portion 18, increases the flow velocity, and is taken into the combustion chamber 12 from one intake port 14.
【００３４】この際、ＥＧＲ制御弁が開かれて、排気還
流が行われると、排気通路１１からのＥＧＲガスは、シ
リンダヘッド１６を貫通して設けられた排気還流通路２
１を通って、スワールコントロールバルブ１０上流の吸
気通路１１に導かれ、吸気と合流しながら、同じく切欠
部１８を通って一方の吸気ポート１４から燃焼室１２に
吸入される。At this time, when the EGR control valve is opened and exhaust gas recirculation is performed, the EGR gas from the exhaust passage 11 passes through the cylinder head 16 and the exhaust gas recirculation passage 2 is provided.
1 is guided to the intake passage 11 upstream of the swirl control valve 10 and merges with the intake air, and is also sucked into the combustion chamber 12 from one intake port 14 through the cutout portion 18.
【００３５】これにより、吸気の流れが乱されることは
なく、燃焼室１２に要求通りの強いスワールが生起され
る。As a result, the flow of intake air is not disturbed, and a strong swirl as required is generated in the combustion chamber 12.
【００３６】この一方、ＥＧＲガスが排気通路１３の外
壁、排気弁口２３、吸気弁口２４の近傍、スワールコン
トロールバルブ１０の切欠部１８側の吸気通路１１の外
壁に沿う排気還流通路２１を通る際の熱によって、スワ
ールコントロールバルブ１０の上流から切欠部１８を通
って燃焼室１２に吸入される吸気、およびその間の吸気
通路１１が加熱される。On the other hand, the EGR gas passes through the outer wall of the exhaust passage 13, the exhaust valve opening 23, the vicinity of the intake valve opening 24, and the exhaust gas recirculation passage 21 along the outer wall of the intake passage 11 on the cutout portion 18 side of the swirl control valve 10. The heat at this time heats the intake air that is taken into the combustion chamber 12 from the upstream of the swirl control valve 10 through the cutout portion 18 and the intake passage 11 therebetween.
【００３７】排気還流通路２１をシリンダヘッド１６を
貫通して設けているため、エンジン外部に露出する部分
が少なくなり、外気によるＥＧＲガス温の低下が防止さ
れる。また、排気通路１３の外壁に沿って排気還流通路
２１を形成しているため、ＥＧＲガスは十分に高温に保
たれる。Since the exhaust gas recirculation passage 21 is provided so as to penetrate the cylinder head 16, the portion exposed to the outside of the engine is reduced, and the EGR gas temperature is prevented from lowering due to the outside air. Further, since the exhaust gas recirculation passage 21 is formed along the outer wall of the exhaust passage 13, the EGR gas is kept at a sufficiently high temperature.
【００３８】このため、燃料インジェクタからの燃料噴
霧および通路壁に沿う燃料壁流が加熱され、気化が十分
に促進される。Therefore, the fuel spray from the fuel injector and the fuel wall flow along the passage wall are heated and vaporization is sufficiently promoted.
【００３９】この場合、排気還流通路２１を図４のよう
に吸気通路１１の中心Ｇｐと見かけ上の切欠部１８の中
心とを結ぶ線上に設けると、切欠部１８を通って燃焼室
１２に吸入される吸気の流れに最も近くなるため、燃料
の気化が一層促進される。In this case, when the exhaust gas recirculation passage 21 is provided on the line connecting the center Gp of the intake passage 11 and the center of the apparent cutout portion 18 as shown in FIG. 4, the exhaust gas is sucked into the combustion chamber 12 through the cutout portion 18. The fuel vaporization is further promoted because it comes closest to the intake air flow.
【００４０】したがって、強いスワールの生起とによっ
て、ＥＧＲガスと新気との安定したミキシング状態が維
持され、急速安定燃焼が得られ、良好なエンジン性能が
確保される。Therefore, due to the occurrence of the strong swirl, the stable mixing state of the EGR gas and the fresh air is maintained, rapid stable combustion is obtained, and good engine performance is secured.
【００４１】また、排気還流通路２１をシリンダヘッド
１６を貫通して設けることにより、エンジン回りの構造
が簡素化し、良好なレイアウト性が確保される。Further, since the exhaust gas recirculation passage 21 is provided so as to penetrate the cylinder head 16, the structure around the engine is simplified and good layout is secured.
【００４２】なお、排気還流通路２１の断面形状を図５
のようにスワールコントロールバルブ１０の切欠部１８
に対応させて弧状の長穴形状に形成しても良い。このよ
うにすれば、伝熱面積を大きくできる。The cross-sectional shape of the exhaust gas recirculation passage 21 is shown in FIG.
Notch 18 of swirl control valve 10
Corresponding to the above, it may be formed in an arc-shaped long hole shape. By doing so, the heat transfer area can be increased.
【００４３】[0043]
【発明の効果】以上のように第１の発明によれば、吸気
通路に切欠部を有するスワールコントロールバルブを備
えると共に、吸気通路を介してシリンダ内に排気の一部
を供給する排気還流通路を備えたエンジンにおいて、シ
リンダヘッドを貫通する排気還流通路をスワールコント
ロールバルブよりも上流にて吸気通路に開口すると共
に、排気還流通路をスワールコントロールバルブの切欠
部側の吸気通路外壁に沿わせて形成したので、燃料の気
化が促進されると共に、ＥＧＲガスと新気との安定した
ミキシング状態が得られ、したがってＥＧＲ時の急速安
定燃焼が達成され、良好なエンジン性能が確保される。As described above, according to the first aspect of the invention, the swirl control valve having the cutout portion in the intake passage is provided, and the exhaust gas recirculation passage for supplying a part of the exhaust gas into the cylinder through the intake passage is provided. In the engine provided, an exhaust gas recirculation passage that penetrates the cylinder head is opened to the intake passage upstream of the swirl control valve, and the exhaust gas recirculation passage is formed along the outer wall of the intake passage on the cutout side of the swirl control valve. Therefore, the vaporization of the fuel is promoted, and a stable mixing state of the EGR gas and the fresh air is obtained. Therefore, rapid stable combustion at the EGR time is achieved, and good engine performance is secured.
【００４４】排気還流通路をシリンダヘッドを貫通して
形成したので、外気によるＥＧＲガス温の低下が防止さ
れ、燃料の気化が一層促進される一方、エンジン回りの
構造が簡素化し、良好なレイアウト性が確保される。Since the exhaust gas recirculation passage is formed through the cylinder head, the EGR gas temperature is prevented from lowering due to the outside air and the fuel vaporization is further promoted, while the structure around the engine is simplified and the layout is excellent. Is secured.
【００４５】また、排気還流通路を吸気通路とスワール
コントロールバルブの切欠部中心を結ぶ線上に設けるこ
とで、吸気ポート内壁に付着した燃料の気化が一層促進
される。Further, by providing the exhaust gas recirculation passage on the line connecting the intake passage and the center of the cutout portion of the swirl control valve, the vaporization of the fuel adhering to the inner wall of the intake port is further promoted.
【００４６】また、排気還流通路をスワールコントロー
ルバルブの切欠部に対応した弧状の長穴形状に形成する
ことで、伝熱面積が拡大する。Further, the heat transfer area is expanded by forming the exhaust gas recirculation passage into an arc-shaped elongated hole shape corresponding to the cutout portion of the swirl control valve.
【図１】実施例の構成断面図である。FIG. 1 is a configuration cross-sectional view of an example.
【図２】図１のＸ−Ｘ線に沿う断面図である。FIG. 2 is a sectional view taken along line XX of FIG.
【図３】図１のＡ−Ａ線から見たバルブ部分の詳細図で
ある。FIG. 3 is a detailed view of the valve portion as seen from the line AA in FIG.
【図４】図１のＢ−Ｂ線に沿う断面図である。4 is a cross-sectional view taken along the line BB of FIG.
【図５】他の実施例を示す断面図である。FIG. 5 is a sectional view showing another embodiment.
１０ スワールコントロールバルブ １１ 吸気通路 １２ 燃焼室 １３ 排気通路 １４ 吸気ポート １５ 吸気弁 １６ シリンダヘッド １７ 回転軸 １８ 切欠部 １９ 排気ポート ２１ 排気還流通路 ２４ 吸気弁口 10 swirl control valve 11 intake passage 12 combustion chamber 13 exhaust passage 14 intake port 15 intake valve 16 cylinder head 17 rotating shaft 18 notch 19 exhaust port 21 exhaust gas recirculation passage 24 intake valve port
Claims (3)
トロールバルブを備えると共に、吸気通路を介してシリ
ンダ内に排気の一部を供給する排気還流通路を備えるエ
ンジンにおいて、シリンダヘッドを貫通する排気還流通
路をスワールコントロールバルブよりも上流にて吸気通
路に開口すると共に、排気還流通路をスワールコントロ
ールバルブの切欠部側の吸気通路外壁に沿わせて形成し
たことを特徴とするエンジンの排気還流通路の構造。1. An exhaust gas recirculation passage that penetrates a cylinder head in an engine that includes a swirl control valve having a cutout portion in the intake passage and an exhaust gas recirculation passage that supplies a part of exhaust gas into a cylinder through the intake passage. Is opened in the intake passage upstream of the swirl control valve, and the exhaust gas recirculation passage is formed along the outer wall of the intake passage on the notch side of the swirl control valve.
コントロールバルブの切欠部中心を結ぶ線上に設けた請
求項１に記載のエンジンの排気還流通路の構造。2. The structure of the exhaust gas recirculation passage for an engine according to claim 1, wherein the exhaust gas recirculation passage is provided on a line connecting an intake passage and a notch center of a swirl control valve.
ルバルブの切欠部に対応した弧状の長穴形状に形成した
請求項２に記載のエンジンの排気還流通路の構造。3. The structure of the exhaust gas recirculation passage for an engine according to claim 2, wherein the exhaust gas recirculation passage is formed in an arc-shaped elongated hole shape corresponding to the cutout portion of the swirl control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03484794A JP3161208B2 (en) | 1994-03-04 | 1994-03-04 | Structure of engine exhaust recirculation passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03484794A JP3161208B2 (en) | 1994-03-04 | 1994-03-04 | Structure of engine exhaust recirculation passage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07247917A true JPH07247917A (en) | 1995-09-26 |
| JP3161208B2 JP3161208B2 (en) | 2001-04-25 |
Family
ID=12425585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03484794A Expired - Fee Related JP3161208B2 (en) | 1994-03-04 | 1994-03-04 | Structure of engine exhaust recirculation passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3161208B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2370073A (en) * | 2000-10-13 | 2002-06-19 | Honda Motor Co Ltd | Engine cylinder head with EGR (exhaust gas recirculation) passage formed within it |
| EP2098716A2 (en) | 2008-03-05 | 2009-09-09 | Aisin Seiki Kabushiki Kaisha | Gas introducing structure of intake path |
| US8936012B2 (en) | 2010-09-27 | 2015-01-20 | Toyota Jidosha Kabushiki Kaisha | Cylinder head |
-
1994
- 1994-03-04 JP JP03484794A patent/JP3161208B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2370073A (en) * | 2000-10-13 | 2002-06-19 | Honda Motor Co Ltd | Engine cylinder head with EGR (exhaust gas recirculation) passage formed within it |
| US6470865B2 (en) | 2000-10-13 | 2002-10-29 | Honda Giken Kogyo Kabushiki Kaisha | Engine cylinder head |
| GB2370073B (en) * | 2000-10-13 | 2005-02-16 | Honda Motor Co Ltd | Engine cylinder head |
| EP2098716A2 (en) | 2008-03-05 | 2009-09-09 | Aisin Seiki Kabushiki Kaisha | Gas introducing structure of intake path |
| US8011352B2 (en) | 2008-03-05 | 2011-09-06 | Aisin Seiki Kabushiki Kaisha | Gas introducing structure of intake path |
| US8936012B2 (en) | 2010-09-27 | 2015-01-20 | Toyota Jidosha Kabushiki Kaisha | Cylinder head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3161208B2 (en) | 2001-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3539246B2 (en) | Exhaust gas recirculation system for internal combustion engine | |
| JP2007113482A (en) | Resin intake manifold | |
| JPS5932656B2 (en) | engine intake system | |
| JP2004308470A (en) | Air intake device for internal combustion engine | |
| JPH11236817A (en) | Intake passage for internal combustion engine | |
| JPH07247917A (en) | Structure of exhaust reflux passage of engine | |
| JP3433851B2 (en) | Engine intake control device | |
| JP4971242B2 (en) | Intake device for internal combustion engine | |
| JPH06280580A (en) | Four-cycle internal combustion engine | |
| JPH0415939Y2 (en) | ||
| JPS6364616B2 (en) | ||
| JP3506769B2 (en) | Engine intake control device | |
| JPH11351071A (en) | Egr system for internal-combustion engine | |
| JPH11294266A (en) | Exhaust gas recirculation system | |
| JPH07180560A (en) | Suction device for internal combustion engine | |
| JP3873442B2 (en) | Engine exhaust gas recirculation system | |
| JPH0410336Y2 (en) | ||
| JPH04342824A (en) | Intake-air control device for internal combustion engine | |
| JPH0346183Y2 (en) | ||
| JP3427614B2 (en) | Intake device for internal combustion engine | |
| JP3147571B2 (en) | Intake device for internal combustion engine | |
| JP2777718B2 (en) | 4-stroke engine | |
| JPH06341324A (en) | Engine combustion control device | |
| JPH0134695Y2 (en) | ||
| JPH048297Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080223 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090223 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090223 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100223 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |