JPS5833204Y2 - Internal combustion engine sub-intake valve structure - Google Patents
Internal combustion engine sub-intake valve structureInfo
- Publication number
- JPS5833204Y2 JPS5833204Y2 JP1977093415U JP9341577U JPS5833204Y2 JP S5833204 Y2 JPS5833204 Y2 JP S5833204Y2 JP 1977093415 U JP1977093415 U JP 1977093415U JP 9341577 U JP9341577 U JP 9341577U JP S5833204 Y2 JPS5833204 Y2 JP S5833204Y2
- Authority
- JP
- Japan
- Prior art keywords
- intake valve
- sub
- internal combustion
- combustion 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.)
- Expired
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】 本考案は内燃機関の副吸気弁構造に関する。[Detailed explanation of the idea] The present invention relates to a sub-intake valve structure for an internal combustion engine.
内燃機関を非常に薄い混合気で運転するいわゆる希薄燃
焼方式は排気ガス対策と燃料消費低減の両面から最も望
ましい方式の一つであるが混合気かり一ンになるに従っ
て着火性の悪化、燃焼速度の低下、燃焼変動の増大等好
捷しくない現象が発生することは良く知られている。The so-called lean burn method, in which an internal combustion engine is operated with a very lean mixture, is one of the most desirable methods from the standpoint of both exhaust gas countermeasures and fuel consumption reduction, but as the mixture becomes thinner, ignitability deteriorates and the combustion speed deteriorates. It is well known that unfavorable phenomena such as a decrease in fuel consumption and an increase in combustion fluctuations occur.
本考案はこれらの問題を解決するため、シリンダー内に
混合気流速を向上、或いはシリンダー内流速の向上を図
り且つ吸入混合気に成る方向性を持たせ、ることにより
燃焼作用を改善し、機関の混合気のり一ン限界を改善す
るなど、燃料消費と有害排気ガスの低減を図るものであ
る。In order to solve these problems, the present invention improves the combustion effect by increasing the air-fuel mixture flow velocity in the cylinder, or by increasing the air-fuel mixture flow velocity in the cylinder and giving direction to the intake air-fuel mixture. The aim is to reduce fuel consumption and harmful exhaust gases by improving the air-fuel mixture ratio limit.
従来はシリンダー内混合気の流速を向上し、混合気に強
い乱れを与え燃焼改善を図るため「シュラウド弁」、「
シュラウドポート」、「ポート絞り」などが提案されて
いたが、何れの方式も高負荷時（最大負荷時）に吸入効
率の低下を免れず出力が低下する欠点があった。Conventionally, "shroud valves" and "
"Shrouded port" and "port constriction" have been proposed, but both methods suffer from a drop in suction efficiency and output at high loads (maximum load).
又近時内熱機関に吸気弁に加えて更に副吸気弁を設け、
この副吸気弁より音速又は音速に近い渦流生成用の空気
或いは混合気あるいはＥＧＲガスを導入してシリンダー
内に渦流を生成して混合気に擾乱を与えるものが開発さ
れて来た。In recent years, internal heat engines have been equipped with a sub-intake valve in addition to the intake valve.
A system has been developed in which vortex-generating air, a mixture, or EGR gas at or near the sonic speed is introduced through the sub-intake valve to generate a vortex in the cylinder and disturb the air-fuel mixture.
この方式は高負荷時には副吸気弁から殆んど新気が導入
されなくなり、高負荷時に過大な擾乱が作られることに
よる吸入効率の低下を防止することは出来る。In this system, hardly any fresh air is introduced from the auxiliary intake valve at high loads, and it is possible to prevent a decrease in suction efficiency due to excessive turbulence created at high loads.
しかしながら従来の副吸気弁の構造では副吸気弁より導
入される混合気又は空気に適切な方向性を与えることが
出来ず、この導入混合気又は空気又はＥＧＲガスに所定
の方向性を与えな・ければ充分な効果が得られない欠点
を免れなかった。However, with the structure of the conventional sub-intake valve, it is not possible to give appropriate directionality to the air-fuel mixture or air introduced from the sub-intake valve; However, there was a drawback that the sufficient effect could not be obtained if the method was used.
この方向性を与える技術としては特開昭５３−８４０９
号の先願例があるが、これは噴射室に設けられた噴射孔
を介して燃焼室内へ噴流するため燃焼室内での拡散が早
く行われ、噴流の指向性が充分でなかった。As a technology that provides this direction, Japanese Patent Application Laid-Open No. 53-8409
There is a prior application in No. 1, but since the jet flows into the combustion chamber through the injection hole provided in the injection chamber, diffusion within the combustion chamber occurs quickly, and the directivity of the jet is not sufficient.
本考案はこれらの欠点を排除する為に提案されたもので
あって、導入される空気又は混合気又はＥＧＲガスに所
定の方向性を与え得る優れた性能を発揮し得る極めて簡
単な構造の内燃機関の副吸気弁構造を提供することを目
的とする。The present invention has been proposed in order to eliminate these drawbacks, and is an internal combustion engine with an extremely simple structure that can exhibit excellent performance and give a predetermined directionality to the introduced air, air-fuel mixture, or EGR gas. The purpose is to provide a sub-intake valve structure for an engine.
上述の目的を達成する為に本考案は、主吸気弁の他に渦
流生成用の気体を高速で燃焼室内に導入するための副吸
気弁を備えた内燃機関において、□前記副吸気弁の弁頭
部付近の弁ステム部分に副吸気弁案内筒と密に滑動嵌合
する大径部を形成し、この大径部に渦流生成用の気体を
導く導孔又は溝を設けて開弁時に新気あるい／／′１Ｅ
ＧＲガスに方向性を与えて燃焼室に導入せしめることを
特徴とするものである。In order to achieve the above-mentioned object, the present invention provides an internal combustion engine equipped with a sub-intake valve for introducing vortex-generating gas into the combustion chamber at high speed in addition to the main intake valve. A large diameter part is formed in the valve stem part near the head that tightly slides into the auxiliary intake valve guide cylinder, and a guide hole or groove is provided in this large diameter part to guide the gas for creating a vortex flow. Kiai //'1E
It is characterized by giving directionality to the GR gas and introducing it into the combustion chamber.
上述の導孔ば、大径部を斜めに貫通する如く形成して開
弁時に新気又はＥＧＲガスを所望の方向に指向させる如
く方向性を与えて燃焼室に導入する如くなし得る。The above-mentioned guide hole may be formed so as to pass diagonally through the large diameter portion, so that when the valve is opened, fresh air or EGR gas is directed in a desired direction and introduced into the combustion chamber.
副吸気弁には新気として混合気を導入してもよく、又大
気を導入してもよい。The air-fuel mixture may be introduced into the sub-intake valve as fresh air, or the atmosphere may be introduced into the sub-intake valve.
又ＥＧＲガスでもよい。Alternatively, EGR gas may be used.
副吸気弁の導孔より噴射する新気を点火栓に指向させる
ことにより点火栓の清掃、着火の改善及び混合気の擾乱
が得られる。By directing fresh air injected from the guide hole of the auxiliary intake valve toward the ignition plug, cleaning of the ignition plug, improvement of ignition, and disturbance of the air-fuel mixture can be achieved.
以下に添付図面を参照して本考案の望ましい実施例を説
明する。Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
先ず第１図を参照し、本考案の理解を深める為に従来技
術の副吸気弁を組込んだ内燃機関を示す。Referring first to FIG. 1, an internal combustion engine incorporating a prior art sub-intake valve is shown for a better understanding of the present invention.
この内燃機関は吸気通路１，１′からペンチエリ一部２
，２′及び絞り一弁３，３′を経てシリンダー４の燃焼
室５に接続され、公知の如く混合気を供給する吸気ポー
ト６に配置される吸気弁７を有し、シリンダー４内には
、ピストン８が往復運動する如く配置され、燃焼室５に
は排気弁９（第２図）が配置されると共に点火栓１０が
燃焼室５に配置され公知の如く吸気弁７、ピストン８、
排気弁９、点火栓１０の作動により、燃焼室５内に導入
された混合気の燃焼によりピストン８を往復運動をさせ
て機関の運転及び混合気の吸入、排出を行う。This internal combustion engine runs from the intake passages 1 and 1' to the pentieri part 2.
, 2' and throttle valves 3, 3', and is connected to the combustion chamber 5 of the cylinder 4, and has an intake valve 7 disposed at the intake port 6 for supplying air-fuel mixture as is known in the art. , a piston 8 is arranged to reciprocate, an exhaust valve 9 (FIG. 2) is arranged in the combustion chamber 5, an ignition plug 10 is arranged in the combustion chamber 5, and the intake valve 7, piston 8,
By operating the exhaust valve 9 and the spark plug 10, the air-fuel mixture introduced into the combustion chamber 5 is combusted, causing the piston 8 to reciprocate, thereby operating the engine and sucking and discharging the air-fuel mixture.
シリンダー４のヘッドに吸気弁７よりも弁径の小なる副
吸気弁１１が配置されている。A sub-intake valve 11 having a smaller valve diameter than the intake valve 7 is arranged in the head of the cylinder 4.
この副吸気弁１１はシリンダーヘッド壁面に内蔵される
副吸気弁案内筒１２内で吸気弁７即ち主吸気弁とほぼ同
期して開閉される如く図示されない機関の公知のカムシ
ャフト及びロッカーアーム等によって作動され吸気通路
１の絞り弁３の上流側に接続されている副吸気通路１３
を経て案内筒１２の環状空間１２ａに供給される新気を
副吸気弁１１を通して燃焼室５に供給するようになって
いる。The auxiliary intake valve 11 is opened and closed within a auxiliary intake valve guide cylinder 12 built into the cylinder head wall in substantially synchronization with the intake valve 7, that is, the main intake valve, by a known camshaft, rocker arm, etc. of the engine (not shown). A sub-intake passage 13 that is activated and connected to the upstream side of the throttle valve 3 of the intake passage 1
Fresh air is supplied to the annular space 12a of the guide tube 12 through the auxiliary intake valve 11 to the combustion chamber 5.
上述の如く構成されているから、従来の副吸気弁を有す
る内燃機関に釦いては副吸気弁より供給される新気には
充分な方向性を与えることが出来ず、既述の如くシリン
ダー内の流速は増大出来ても充分に燃焼改善を行うこと
が出来なかったのである。Because of the structure described above, in a conventional internal combustion engine having a sub-intake valve, fresh air supplied from the sub-intake valve cannot be given sufficient directionality, and as mentioned above, Even if the flow velocity could be increased, it was not possible to sufficiently improve combustion.
尚第２図は第１の線■−Ｈによる燃焼室５の平面図を示
す。Incidentally, FIG. 2 shows a plan view of the combustion chamber 5 taken along the first line -H.
上述の如き従来の欠点を排除する為に本考案に於ては副
吸気弁の特殊の構造により供給される新気あるいはＥＧ
Ｒガスに方向性を与える如く構成されていることを特徴
とするものである。In order to eliminate the above-mentioned drawbacks of the conventional method, the present invention utilizes fresh air or EG supplied by a special structure of the auxiliary intake valve.
It is characterized by being constructed so as to give directionality to the R gas.
第３図は本考案の実施例を示し、本考案による副吸気弁
１４は弁傘部即ち弁頭部に近接せる弁ステム１４ａの部
分が案内筒１２の内径に密に滑動嵌合する大径部１４ｂ
に形成され、弁ステム１４ａと大径部１４ｂとを截頭円
錐形部１４ｃで連接したものである。FIG. 3 shows an embodiment of the present invention, in which the auxiliary intake valve 14 according to the present invention has a valve stem 14a having a large diameter so that the portion of the valve stem 14a that is close to the valve head, that is, the valve stem 14a is closely slidably fitted into the inner diameter of the guide tube 12. Part 14b
The valve stem 14a and the large diameter portion 14b are connected by a truncated conical portion 14c.
大径部１４ｂの長さは、副吸気弁１４のリフトより犬と
し、即ち、副吸気弁１４が全開位置に動かされた時にも
充分に案内筒１２に嵌合して環状空間１２ａからの新気
あるい（ｒｉＥＧＲガスの流出を阻止出来る程度の長さ
としである。The length of the large diameter portion 14b is longer than the lift of the auxiliary intake valve 14, that is, even when the auxiliary intake valve 14 is moved to the fully open position, it can be sufficiently fitted into the guide tube 12 and new air from the annular space 12a can be removed. The length should be long enough to prevent the outflow of riEGR gas.
本考案の特徴によりこの副吸気弁１４には第３図に示さ
れる通り截頭円錐形部１４ｃから斜めに大径部１４ｂを
貫通して大径部１４ｂの周面の副吸気弁１４が開弁した
時に燃焼室５に連通ずる位置にて開口する新気導孔１５
を形成しである。Due to the features of the present invention, as shown in FIG. 3, the sub-intake valve 14 is opened on the circumferential surface of the large-diameter portion 14b by diagonally penetrating the large-diameter portion 14b from the truncated conical portion 14c. A fresh air introduction hole 15 opens at a position communicating with the combustion chamber 5 when the valve is opened.
It is formed.
従って副吸気弁１４が第４図に示される通り開弁位置に
動かされた場合案内筒１２は大径部１４ｂによって遮蔽
されているが新気あるいはＥＧＲガスは導孔１５を通っ
て矢印Ａ、Ｂ、Ｃの如く環状空間１２ａから燃焼室５内
へ導孔１５の方向により所定の方向性を与えられて噴射
され、内部の混合気の擾乱を助長し、燃焼効率を大巾に
向上させることが出来る。Therefore, when the auxiliary intake valve 14 is moved to the valve open position as shown in FIG. As shown in B and C, the fuel is injected from the annular space 12a into the combustion chamber 5 with a predetermined directionality given by the direction of the guide hole 15, promoting disturbance of the internal air-fuel mixture and greatly improving combustion efficiency. I can do it.
副吸気弁１４は上述の如く導孔１５の方向性を確保する
為に回転止めを設けるが、これは公知の装置を利用すれ
ばよく、特に詳細に説明する要はない。As mentioned above, the sub-intake valve 14 is provided with a rotation stopper to ensure the directionality of the guide hole 15, but this can be done by using a known device and there is no need to explain it in detail.
オた、回転止めの設定位置により、導入方向性を自由に
選択することができる。Additionally, the direction of introduction can be freely selected by setting the rotation stopper.
同図面には副吸気弁１４にその大径部を斜めに貫通する
導孔を設けたものを示しであるが、本考案は図示実施例
に制限されるものでなく、例えば截頭円錐形部から大径
部の周面に沿って弁ステムの長手方向に伸長し、弁頭部
の付近で終端する溝の形状になしても同様の効果を得る
ことが出来る。Although the drawing shows that the sub-intake valve 14 is provided with a guide hole passing diagonally through its large diameter part, the present invention is not limited to the illustrated embodiment; for example, a truncated conical part A similar effect can be obtained by forming a groove that extends in the longitudinal direction of the valve stem along the circumferential surface of the large diameter portion and terminates near the valve head.
上述の如く本考案によれば極めて簡単な構造の副吸気弁
を配設するのみで所望の新気導入の方向性を附与するこ
とが出来、その効果は極めて犬である。As described above, according to the present invention, the desired directionality of fresh air introduction can be imparted by simply arranging a sub-intake valve with an extremely simple structure, and the effect is extremely significant.
上述せる本考案の作用効果を要約すれば次の通りである
。The effects of the present invention described above are summarized as follows.
（１）混合気の流速向上及び回転止めの設定位置により
最適な方向性を得ることができ、吸入効果を低下させる
ことなく、所期のシリンダー内の混合気の良好な流動を
得ることができる。(1) Optimum directionality can be obtained by increasing the flow velocity of the mixture and the setting position of the rotation stopper, and it is possible to obtain the desired good flow of the mixture within the cylinder without reducing the suction effect. .
（２）従って燃焼速度は増大し、希薄混合気運転が可能
となり、リーン限界は改善され、燃費は向上し、有害排
気は低減する。(2) Therefore, the combustion rate is increased, lean mixture operation is possible, the lean limit is improved, fuel efficiency is improved, and harmful emissions are reduced.
（３）点火栓は常にクリーンに保持されるため、着火性
が向上する。(3) Since the spark plug is always kept clean, ignitability is improved.
（４）点火栓の寿命がのびる（耐久性向上）（５）出力
の低下がない。(4) The life of the spark plug is extended (improved durability) (5) There is no decrease in output.
第１図は従来の副吸気弁を有する内燃機関の一例を示す
概略的断面図。
第２図は第１図の線■■による平面図。
第３図は本考案による副吸気弁の一実施例の断面図。
第４図は第３図の副吸気弁の開放位置に於ける断面図。
１．１′・・・・・・吸気通路、３，３′・・・・・・
絞り弁、４・・・・・・シリンダー、５・・・・・・燃
焼室、６・・・・・・吸気ポート、７・・・・・・吸気
弁、８・・・・・・ピストン、１０・・・・・・点火栓
、１１・・・・・・従来の副吸気弁、１２・・・・・・
案内筒、１２ａ・・・・・・環状空間、１４・・・・・
・本考案による副吸気弁、１４ｂ・・・・・・大径部、
１５・・・・・・導孔。FIG. 1 is a schematic cross-sectional view showing an example of an internal combustion engine having a conventional sub-intake valve. Figure 2 is a plan view taken along the lines ■■ in Figure 1. FIG. 3 is a sectional view of an embodiment of the sub-intake valve according to the present invention. FIG. 4 is a sectional view of the sub-intake valve shown in FIG. 3 in an open position. 1.1'...Intake passage, 3,3'...
Throttle valve, 4...Cylinder, 5...Combustion chamber, 6...Intake port, 7...Intake valve, 8...Piston , 10... Spark plug, 11... Conventional auxiliary intake valve, 12...
Guide cylinder, 12a... annular space, 14...
・Sub-intake valve according to the present invention, 14b...Large diameter part,
15... Guide hole.
Claims (4)
室内に導入するための副吸気弁を備えた内燃機関におい
て、前記副吸気弁の弁頭部付近の弁ステム部分に副吸気
弁案内筒と密に滑動嵌合する大径部を形成し、この大径
部に渦流生成用の気体を導く導孔又は溝を設けて開弁時
に前記気体に方向性を与えて燃焼室に導入せしめること
を特徴とする内燃機関の副吸気弁構造。(1) In an internal combustion engine equipped with a sub-intake valve for introducing gas for vortex generation into the combustion chamber at high speed in addition to the main intake valve, the sub-intake valve has a sub-intake valve near the valve head of the sub-intake valve. A large-diameter portion is formed that tightly slides into the intake valve guide tube, and a guide hole or groove is provided in the large-diameter portion to guide gas for generating a vortex flow to give directionality to the gas when the valve is opened. A sub-intake valve structure for an internal combustion engine, characterized in that it is introduced into the sub-intake valve structure of an internal combustion engine.
する実用新案登録請求の範囲第１項記載の内燃機関の副
吸気弁構造。(2) The sub-intake valve structure for an internal combustion engine according to claim 1, wherein the sub-intake valve has a rotation stopper.
開弁時に渦流生成用の気体に方向性を与えて燃焼室に導
入することを特徴とする実用新案登録請求の範囲第１項
または第２項記載の内燃機関の副吸気弁構造。(3) forming the guide hole diagonally through the large diameter portion;
A sub-intake valve structure for an internal combustion engine according to claim 1 or 2, characterized in that when the valve is opened, the vortex-generating gas is directed and introduced into the combustion chamber.
にしたことを特徴とする実用新案登録請求の範囲第１乃
至３項の何れかに記載の内熱機関の副吸気弁構造。(4) The auxiliary intake valve structure for an internal heat engine according to any one of claims 1 to 3 of the utility model registration claim, characterized in that the gas for generating vortex flow is introduced toward the ignition plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977093415U JPS5833204Y2 (en) | 1977-07-15 | 1977-07-15 | Internal combustion engine sub-intake valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977093415U JPS5833204Y2 (en) | 1977-07-15 | 1977-07-15 | Internal combustion engine sub-intake valve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5421706U JPS5421706U (en) | 1979-02-13 |
| JPS5833204Y2 true JPS5833204Y2 (en) | 1983-07-25 |
Family
ID=29024519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1977093415U Expired JPS5833204Y2 (en) | 1977-07-15 | 1977-07-15 | Internal combustion engine sub-intake valve structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833204Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51106809A (en) * | 1975-03-18 | 1976-09-22 | Mitsubishi Motors Corp |
-
1977
- 1977-07-15 JP JP1977093415U patent/JPS5833204Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51106809A (en) * | 1975-03-18 | 1976-09-22 | Mitsubishi Motors Corp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5421706U (en) | 1979-02-13 |
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