JPH0627798Y2 - Air supply port for internal combustion engine - Google Patents
Air supply port for internal combustion engineInfo
- Publication number
- JPH0627798Y2 JPH0627798Y2 JP1985051135U JP5113585U JPH0627798Y2 JP H0627798 Y2 JPH0627798 Y2 JP H0627798Y2 JP 1985051135 U JP1985051135 U JP 1985051135U JP 5113585 U JP5113585 U JP 5113585U JP H0627798 Y2 JPH0627798 Y2 JP H0627798Y2
- Authority
- JP
- Japan
- Prior art keywords
- air supply
- supply port
- port
- guide plate
- internal combustion
- 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
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は４サイクル内燃機関の給気ポートに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an air supply port of a four-cycle internal combustion engine.
第４図は従来の４サイクル内燃機関の給気系を示す断面
図、第５図は第４図のＶ−Ｖ断面図である。FIG. 4 is a sectional view showing an air supply system of a conventional four-cycle internal combustion engine, and FIG. 5 is a sectional view taken along line VV of FIG.
第４図で、１は給気弁、２は給気弁座インサート、３は
らせん状の給気ポート、４はシリンダである。In FIG. 4, 1 is an intake valve, 2 is an intake valve seat insert, 3 is a spiral intake port, and 4 is a cylinder.
また、第５図で５は排気弁、７は燃料噴射弁（ディーゼ
ルエンジンの場合）あるいは点火栓（ガソリンエンジン
の場合）、６は給気弁のまわりの給気の流速分布を示
す。Further, in FIG. 5, 5 is an exhaust valve, 7 is a fuel injection valve (in the case of a diesel engine) or a spark plug (in the case of a gasoline engine), and 6 is a flow velocity distribution of the air supply around the air supply valve.
次に前記従来例の作用について説明する。Next, the operation of the conventional example will be described.
前記構成において、給気ポート３からシリンダ４内へ給
気が入る場合、該給気は、第５図に示すように、給気ポ
ート内壁面の形状に沿って給気弁１に到達するまでの間
に、壁面によりガイドされ給気弁１の中心まわりの旋回
成分を持ちながら給気弁インサート２の上部内面に沿っ
て給気弁１上からシリンダ４内に流れ込む。シリンダ４
内に流れ込んだ給気は、シリンダ軸心まわりに旋回流を
形成し、シリンダ内での混合気形成を助け燃焼効率向上
に効果をあげている。In the above configuration, when the air is supplied from the air supply port 3 into the cylinder 4, the air supply reaches the air supply valve 1 along the shape of the inner wall surface of the air supply port as shown in FIG. In the meantime, while flowing with a swirl component around the center of the air supply valve 1 guided by the wall surface, it flows into the cylinder 4 from above the air supply valve 1 along the upper inner surface of the air supply valve insert 2. Cylinder 4
The supply air that has flowed in forms a swirling flow around the cylinder axis, which helps to form a mixture in the cylinder and is effective in improving combustion efficiency.
さらに、この種給気ポートとして実開昭52-94509号の考
案が提供されている。Further, the device of Japanese Utility Model Publication No. 52-94509 is provided as this kind of air supply port.
これは、給気ポートに、該ポートの縦断面（高さ方向）
の中央部に翼状のガイド板（翼状制御板）を設けて、該
ガイド板により給気ポートの中央部を主体として左右方
向の給気流を制御している。This is a vertical cross section of the air supply port (in the height direction)
A wing-shaped guide plate (a wing-shaped control plate) is provided in the central portion of, and the air supply airflow in the left-right direction is controlled mainly by the central portion of the air supply port by the guide plate.
ところが第４図及び第５図に示すものにおいては、シリ
ンダ軸心まわりの旋回流は、給気ポート３内壁面の形状
により決定されるので、シリンダ内の旋回回転数ＮSと
エンジン回転数ＮEとの比（ＮS／ＮE）とほぼ一定であ
る。しかし、エンジン回転数ＮEの低い時には、燃料噴
射圧力が低いこと等により混合気形成能力が低下してく
るので、空気旋回回転数ＮSは高い方が好ましい。即ち
スワール比（ＮS／ＮE）が固定であるので、エンジンの
すべての運転状態で良好な混合気形成状態を保つことが
できないと言う欠点があった。However, in those shown in FIGS. 4 and 5, since the swirling flow around the cylinder axis is determined by the shape of the inner wall surface of the air supply port 3, the swirling rotational speed N S in the cylinder and the engine rotational speed N S The ratio to E (N S / N E ) is almost constant. However, when the engine rotational speed N E is low, the air-fuel swirl rotational speed N S is preferably high because the air-fuel mixture forming capacity is reduced due to the low fuel injection pressure and the like. That is, since the swirl ratio (N S / N E ) is fixed, there is a drawback that a good mixture formation state cannot be maintained in all operating conditions of the engine.
また、実開昭52-94509号のものは、ガイド板により給気
ポート内の左右方向の給気流を制御していることから、
上下方向に給気流を制御することはできない。Also, in the case of No. 52-94509, the guide plate controls the left / right air supply in the air supply port,
It is not possible to control the air supply in the vertical direction.
また、給気流路の中央部に高さ方向全体に亘ってガイド
板を設けているので、給気の抵抗が大きくなる。Further, since the guide plate is provided in the central portion of the air supply passage over the entire height direction, the resistance of the air supply is increased.
本考案の目的は前記従来装置の問題点を解消し、給気ポ
ートの上下方向の給気流の制御を給気抵抗が小さい機構
で以って実現することにより、給気スワールの形成を改
善し、機関の燃焼効率の向上を図った内燃機関の給気ポ
ートを提供するにある。The object of the present invention is to solve the problems of the conventional device and improve the formation of the air supply swirl by realizing the control of the air supply air flow in the vertical direction of the air supply port with a mechanism having a small air supply resistance. The purpose of the present invention is to provide an air supply port for an internal combustion engine that improves the combustion efficiency of the engine.
第６図は、給気ポート３内の給気流を観察した模式図で
ある。FIG. 6 is a schematic diagram in which the air supply flow in the air supply port 3 is observed.
同図に示すようならせん状の給気ポート３（スパイラル
ポートあるいはヘリカルポート）の給気弁１上部の渦室
では、該渦室へ流入するポート通路部からの流れによっ
て給気弁１からの流れが規定される。例えば、第６図に
示すように、給気ポート３の天井面に近い，の流れ
は明らかに渦室内部を大きく旋回しており、給気ポート
中央部から下部の流れ及びは渦室部であまり旋回せ
ずにシリンダへと流れ込む。従って、渦室へ流れ込む直
前のポート通路部の天井面近くの流れを変化させること
は、給気弁部の流れを大きく変化させ、シリンダ内での
旋回特性を大きく変えることができる。In the vortex chamber above the air supply valve 1 of the spiral air supply port 3 (spiral port or helical port) as shown in the figure, the air from the air supply valve 1 is discharged by the flow from the port passage portion flowing into the vortex chamber. The flow is regulated. For example, as shown in FIG. 6, the flow near the ceiling surface of the air supply port 3 obviously swirls largely inside the vortex chamber, and the flow from the center of the air supply port to the lower part and the vortex chamber part. It flows into the cylinder without turning too much. Therefore, changing the flow near the ceiling surface of the port passage portion immediately before flowing into the vortex chamber can greatly change the flow of the air supply valve portion and greatly change the swirling characteristics in the cylinder.
本考案に係る内燃機関の給気ポートは、上記の点に着目
し、４サイクル内燃機関のらせん状給気ポートのポート
渦室近傍でかつポートの略上半分の部位に回転可能なガ
イド板を設置し、その回転方向位置によりポート上部の
給気流れを変えてポート底部の給気流れをコントロール
し、エンジン回転数に応じてシリンダ内の旋回流（スワ
ール）の強さを変えることにより、前記目的を達成でき
るようにしたものである。The air supply port of the internal combustion engine according to the present invention has the above-mentioned points in mind, and has a rotatable guide plate in the vicinity of the port vortex chamber of the spiral air supply port of the four-cycle internal combustion engine and in the substantially upper half of the port. It is installed, the supply air flow at the top of the port is controlled by changing its position in the rotation direction to control the supply air flow at the bottom of the port, and the strength of the swirl flow (swirl) in the cylinder is changed according to the engine speed. It is intended to achieve the purpose.
以下第１〜３図を参照して、本考案の一実施例について
説明する。An embodiment of the present invention will be described below with reference to FIGS.
図で１は給気弁、２は給気弁インサート、３は第２図に
示すように、給気弁１に対して給気が旋回して流入する
ように形成されたらせん状の給気ポート、４はシリン
ダ、８は給気ポート３の略上半分でポート３の渦室近傍
に備えつけられたガイド板である。前記ガイド板８は、
第１図に示すように、給気ポート３の高さのほぼ1/2程
度以下の高さを有する。９はガイド板の回転駆動軸、１
０，１１は歯車、１２はガイド板８を駆動する駆動モー
タである。In the figure, 1 is an air supply valve, 2 is an air supply valve insert, and 3 is a spiral air supply formed so that the air supply swirls into the air supply valve 1 as shown in FIG. Ports 4 are cylinders, and 8 is a substantially upper half of the air supply port 3 and a guide plate provided near the vortex chamber of the port 3. The guide plate 8 is
As shown in FIG. 1, the height of the air supply port 3 is about 1/2 or less. 9 is a rotary drive shaft of the guide plate, 1
Reference numerals 0 and 11 are gears, and 12 is a drive motor for driving the guide plate 8.
第２図は第１図のII-II断面図であり、５は排気弁、７
は燃料噴射弁又は点火栓である。2 is a sectional view taken along the line II-II in FIG. 1, and 5 is an exhaust valve and 7
Is a fuel injection valve or a spark plug.
前記実施例の作用について説明する。The operation of the above embodiment will be described.
機関の給気行程中、給気ポート３の天井面に取付けられ
たガイド板８の位置を駆動モータ１２と歯車１０，１１
を介して変えると、ガイド板８の回転位置に応じて、ポ
ート上部の給気流はガイド板８に衝突することにより、
ポート底部への流れを形成する。ポート上部の給気流の
水平成分のガイド板８への衝突角がガイド板８の回転位
置によって変化するので、ポート底部への流れの影響も
変化する。最もポート底部の流れへの影響が大きいの
は、給気ポート３内の流れに対してガイド板８が垂直な
方向となった場合であり、又、殆んど影響のない場合は
ポート内の流れとガイド板８が平行となった場合であ
る。During the air supply stroke of the engine, the position of the guide plate 8 attached to the ceiling surface of the air supply port 3 is set to the drive motor 12 and the gears 10 and 11.
Change through the guide plate 8, depending on the rotation position of the guide plate 8, the air supply above the port collides with the guide plate 8,
Form a flow to the bottom of the port. Since the collision angle of the horizontal component of the air supply at the top of the port with the guide plate 8 changes depending on the rotation position of the guide plate 8, the influence of the flow on the bottom of the port also changes. The greatest effect on the flow at the bottom of the port is when the guide plate 8 is in the direction perpendicular to the flow in the air supply port 3, and when there is almost no effect, the inside of the port is This is the case where the flow and the guide plate 8 are parallel.
尚、ガイド板８がポート３内の流れに対して垂直な方向
となっても、ガイド板８の高さが給気ポート８の高さの
1/2程度であるから、シリンダ内への給気の流入にあま
り影響は及ぼさない。Even if the guide plate 8 is in a direction perpendicular to the flow in the port 3, the height of the guide plate 8 is equal to that of the air supply port 8.
Since it is about 1/2, it does not affect the inflow of supply air into the cylinder so much.
第３図はガイド板８の回転角に対するシリンダ内に形成
されるスワール比（ＮS／ＮE）の関係を示す線図であ
る。FIG. 3 is a diagram showing the relationship between the rotation angle of the guide plate 8 and the swirl ratio (N S / N E ) formed in the cylinder.
前述のとおり、本考案に係る内燃機関の給気ポートは、
４サイクル機関の給気ポートの渦室近くの天井部に設け
られた回転軸のまわりに回動可能に支承され、給気ポー
ト内の給気流を変向させるガイド板を給気ポートの略上
半分の部位に配設したので、エンジンの運転状況に応じ
シリンダ内のスワール形成を、シリンダ内に流入する給
気量を減ずることなく改善することができ、機関の燃焼
効率を向上させることができる。As described above, the air supply port of the internal combustion engine according to the present invention is
A guide plate, which is rotatably supported around a rotary shaft provided on a ceiling portion near the vortex chamber of the air supply port of the four-cycle engine, and which redirects the air flow in the air supply port, is substantially above the air supply port. Since it is arranged in half, swirl formation in the cylinder can be improved according to the operating condition of the engine without reducing the amount of supply air flowing into the cylinder, and the combustion efficiency of the engine can be improved. .
第１図は本考案に係る内燃機関の給気ポート付近の断面
図、第２図は第１図のII-II断面図、第３図はガイド板
の回転角度θとスワール比(NS/NE)の関係線図、第４〜
５図は従来例で第４図は給気ポート付近の断面図、第５
図は第４図のＶ−Ｖ断面図である。第６図は給気ポート
内の流れを示す構成図である。 １……給気弁、２……給気弁座、３……給気ポート、８
……ガイド板、９……回転軸。FIG. 1 is a sectional view around the air supply port of an internal combustion engine according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a rotation angle θ of a guide plate and a swirl ratio (N S / N E ) relationship diagram, 4th ~
FIG. 5 is a conventional example, and FIG. 4 is a cross-sectional view near the air supply port.
The drawing is a sectional view taken along line VV of FIG. FIG. 6 is a configuration diagram showing the flow in the air supply port. 1 ... Air supply valve, 2 ... Air supply valve seat, 3 ... Air supply port, 8
…… Guide plate, 9 …… Rotary axis.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭52−94509（ＪＰ，Ｕ) 実開 昭57−25（ＪＰ，Ｕ) 英国特許930741（ＧＢ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 52-94509 (JP, U) Shown 57-25 (JP, U) British Patent 930741 (GB, A)
Claims (1)
気ポート、給気弁及び給気弁座からなる給気系を具えた
４サイクル機関において、前記給気ポート内の給気弁上
流側の渦室近傍でかつ該ポートの略上半分の部位に設け
られ給気ポート上部の給気流を変向させるガイド板と、
前記給気ポートの天井部に設けられ前記ガイド板を給気
弁と略平行な軸線廻りに回転させる回転軸を備えたこと
を特徴とする内燃機関の給気ポート。1. A four-cycle engine having an air supply system comprising a spiral air supply port, an air supply valve, and an air supply valve seat provided in a cylinder head, and in the air supply port, an upstream side of the air supply valve. A guide plate which is provided in the vicinity of the vortex chamber and in a substantially upper half portion of the port, and which redirects the air supply flow above the air supply port,
An air supply port for an internal combustion engine, comprising: a rotation shaft provided on a ceiling portion of the air supply port for rotating the guide plate around an axis substantially parallel to the air supply valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985051135U JPH0627798Y2 (en) | 1985-04-08 | 1985-04-08 | Air supply port for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985051135U JPH0627798Y2 (en) | 1985-04-08 | 1985-04-08 | Air supply port for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61167426U JPS61167426U (en) | 1986-10-17 |
| JPH0627798Y2 true JPH0627798Y2 (en) | 1994-07-27 |
Family
ID=30569910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985051135U Expired - Lifetime JPH0627798Y2 (en) | 1985-04-08 | 1985-04-08 | Air supply port for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627798Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB930741A (en) | 1959-03-25 | 1963-07-10 | Maschf Augsburg Nuernberg Ag | Internal combustion engine wherein swirl is imparted to the induction air |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5294509U (en) * | 1976-01-12 | 1977-07-15 | ||
| JPS5725U (en) * | 1980-05-30 | 1982-01-05 | ||
| JPS6140913U (en) * | 1984-08-16 | 1986-03-15 | 日本ノ−シヨン工業株式会社 | string fixing device |
-
1985
- 1985-04-08 JP JP1985051135U patent/JPH0627798Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB930741A (en) | 1959-03-25 | 1963-07-10 | Maschf Augsburg Nuernberg Ag | Internal combustion engine wherein swirl is imparted to the induction air |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61167426U (en) | 1986-10-17 |
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