JPS5825855B2 - Intake throttle valve for in-cylinder fuel injection spark ignition engine - Google Patents
Intake throttle valve for in-cylinder fuel injection spark ignition engineInfo
- Publication number
- JPS5825855B2 JPS5825855B2 JP8354377A JP8354377A JPS5825855B2 JP S5825855 B2 JPS5825855 B2 JP S5825855B2 JP 8354377 A JP8354377 A JP 8354377A JP 8354377 A JP8354377 A JP 8354377A JP S5825855 B2 JPS5825855 B2 JP S5825855B2
- Authority
- JP
- Japan
- Prior art keywords
- throttle valve
- intake throttle
- intake
- valve body
- fuel injection
- 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
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】
本発明は筒内燃料噴射式火花機関の吸気絞り弁の改善に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an intake throttle valve for a direct fuel injection spark engine.
筒内・燃料噴射式の火花点火機関（層状燃焼機関は、第
１図、第２図に示すように、ピストン２の圧縮時に噴射
ノズル４から燃料をシリンダ１内に噴射し、空気流（ス
ワール）に燃料噴霧を乗せ点火栓５で着火燃焼させる方
式の内燃機関である。In-cylinder fuel injection type spark ignition engines (stratified combustion engines, as shown in Figures 1 and 2, ) is an internal combustion engine that ignites and burns the fuel spray with the ignition plug 5.
なお、３はシリンダヘッドである。Note that 3 is a cylinder head.
この機関の欠点は、筒内の空気量に対し燃料噴射量の少
ない無負荷あるいは軽負荷時には、燃料噴霧に着火して
もシリンダ内の温度上昇が少ないため希薄な燃料噴霧の
部分には火炎が伝播しにくい。The disadvantage of this engine is that during no-load or light-load conditions, when the amount of fuel injected is small compared to the amount of air in the cylinder, even if the fuel spray is ignited, the temperature rise in the cylinder is small, so flames do not reach the thin fuel spray area. Difficult to propagate.
従って、燃料は未燃のままＨＣ、Ｃｏとして排出され低
温時には白煙となる。Therefore, the fuel is discharged unburned as HC and Co, and becomes white smoke at low temperatures.
この欠点を除くために吸気ポート７の上流に吸気絞り弁
９が設けられ、無負荷あるいは低負荷時には同吸気絞り
弁９で空気量を減少させ、シリンダ１内の温度を上昇さ
せることにより燃焼を良くし、未燃分あるいは白煙の排
出を少なくしている。In order to eliminate this drawback, an intake throttle valve 9 is provided upstream of the intake port 7, and when there is no load or low load, the intake throttle valve 9 reduces the amount of air and increases the temperature inside the cylinder 1, thereby suppressing combustion. This reduces the amount of unburned matter or white smoke emitted.
従来の吸気絞り弁９は、弁閉鎖時には全閉とならない様
に回転軸１２方向の一方に切欠き１３または貫通孔１４
が設けられている（第３図、第４図参照）。The conventional intake throttle valve 9 has a notch 13 or a through hole 14 on one side of the rotating shaft 12 so that the valve does not fully close when closed.
(See Figures 3 and 4).
この吸気絞り弁９は、図示されていないコントロール装
置によって、回転軸１２が回転され、負荷または燃料噴
射量に応じて開口するようになっている。A rotating shaft 12 of the intake throttle valve 9 is rotated by a control device (not shown), so that the intake throttle valve 9 opens depending on the load or the amount of fuel injection.
弁閉鎖時には空気の流れは切欠き１３または貫通孔１４
の部分から吸気ポート７内に流れ、空気の主流を形成し
ている。When the valve is closed, air flows through the notch 13 or through hole 14
The air flows into the intake port 7 from this part, forming the main stream of air.
弁体１１が開口するに従って、回転軸１２より最も離れ
た部分から開き始め、上記空気の主流が上記切欠き１３
や貫通孔１４の部分から新たに開口した部分に移動する
。As the valve body 11 opens, it begins to open from the part farthest from the rotating shaft 12, and the main flow of the air flows into the notch 13.
or from the portion of the through hole 14 to the newly opened portion.
このためシリンダ１内の空気流（スワール）が乱れ、燃
焼の様子も変化し、燃焼変動あるいは失火等を起しやす
くなる欠点がある。As a result, the airflow (swirl) within the cylinder 1 is disturbed, the combustion behavior changes, and combustion fluctuations or misfires are more likely to occur.
本発明の目的は上記の点に着目し、無負荷時あるいは低
負荷時において、吸気絞り弁が開き始める過渡時の燃焼
変動または失火を減少させることのできる吸気絞り弁の
構造を提供することであり、その特徴とするところは、
バタフライ形吸気絞り弁において、弁の閉鎖時に回転軸
の一方側の弁体部分を、弁が閉じた状態のとき、流路に
直角または上流側に向けて少し傾斜するようにし、他方
側の弁体部分を流路の下流側に傾斜させるようにしたこ
と、上記下流側に傾斜させた弁体部分の傾斜角は上記一
方側の弁体部分の上流側への傾斜角度よりも大きくした
こと、さらに上記下流側に傾斜させた弁体部分の回転軸
から最も離れた部分には切欠きまたは貫通孔を設けてい
ることである。An object of the present invention is to provide an intake throttle valve structure that can reduce combustion fluctuations or misfires during the transient period when the intake throttle valve starts to open during no-load or low-load conditions. Yes, its characteristics are:
In a butterfly-type intake throttle valve, when the valve is closed, the valve body on one side of the rotating shaft is perpendicular to the flow path or slightly inclined toward the upstream side, and the valve body on the other side The body portion is inclined toward the downstream side of the flow path, and the angle of inclination of the valve body portion inclined toward the downstream side is larger than the angle of inclination toward the upstream side of the valve body portion on one side; Furthermore, a notch or a through hole is provided in the portion of the valve body inclined toward the downstream side that is farthest from the rotation axis.
この場合は、切欠きまたは貫通孔から流れる空気の主流
が引続いて開口される弁開口部から流れる空気の主流と
流れが一致し、問題点を解決することができる。In this case, the main flow of air flowing from the notch or through hole coincides with the main flow of air flowing from the subsequently opened valve opening, and the problem can be solved.
以下図面を参照して本発明による実施例につき説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第５図は本発明による１実施例の吸気絞り弁を装着した
機関の要部を示す断面図、第６図は第５図の吸気絞り弁
を拡大して示す断面図、第７図は第６図の■−■矢視断
面図である。FIG. 5 is a sectional view showing the main parts of an engine equipped with an intake throttle valve according to an embodiment of the present invention, FIG. 6 is an enlarged sectional view showing the intake throttle valve of FIG. 5, and FIG. 6 is a sectional view taken along the line ■-■ in FIG. 6;
図において、１はシリンダ、２はピストン、７は吸気ポ
ートである。In the figure, 1 is a cylinder, 2 is a piston, and 7 is an intake port.
吸気絞り弁γの流路を横断した回転軸２０の一方側に固
着された弁体部分２１は、流路の軸心に対して直角ない
しは上流に向って傾斜している。A valve body portion 21 fixed to one side of a rotating shaft 20 that crosses the flow path of the intake throttle valve γ is inclined at right angles to or upstream with respect to the axis of the flow path.
回転軸２０の他方側に固着された弁体部分２２は下流へ
向って傾斜しており、その傾斜角は常に上記弁体部分２
１が上流へ向って傾斜させた角度よりは大きくとってい
る。The valve body portion 22 fixed to the other side of the rotating shaft 20 is inclined toward the downstream, and the angle of inclination is always equal to that of the valve body portion 2.
The angle is larger than that of 1.
上記はいずれも流路を最も締切った状態における位置関
係である。All of the above are positional relationships when the flow path is most closed.
さらに上記弁体２２には切欠き２３が回転半径の最大の
部分に設けてあり、回転軸２０に平行に切断されている
。Furthermore, a notch 23 is provided in the valve body 22 at the largest portion of the rotation radius, and is cut parallel to the rotation axis 20 .
また、上記切欠き２３の代りに貫通孔を設けてもよい。Furthermore, a through hole may be provided instead of the cutout 23.
上記構成の場合の作用、効果について述べる。The functions and effects of the above configuration will be described.
吸気絞り弁９′が閉鎖している時には、空気は切欠き２
３からのみ流れ込み、流れの主流を形成している。When the intake throttle valve 9' is closed, air flows through the notch 2.
It flows only from 3 and forms the main flow.
ここで、負荷または燃料噴射量の増加に応じて回転軸２
０が矢印のように回動されると、回転半径の最も大きい
部分から流路が大きく開口されるが、弁体２１，２２の
回転軸２０への取付は角度の関係から、一方の弁体２２
側からの空気の流出が最も大きく、上記切欠き２３から
の空気の主流がそのまま継続して拡大されて行く。Here, depending on the increase in load or fuel injection amount, the rotating shaft 2
0 is rotated as shown by the arrow, the flow path is opened wide from the part with the largest radius of rotation, but due to the angle, the valve bodies 21 and 22 are attached to the rotating shaft 20 only when one valve body is attached. 22
The outflow of air from the sides is the largest, and the main flow of air from the notch 23 continues to expand.
従って、吸気絞り弁９′の閉鎖時から開口過渡時の空気
の流れの主流の位置が変化しないので、シリンダ１内に
形成されるスワールが、各々の弁開度で最も強く、かつ
スワールに乱れがなく、燃焼が安定し失火も少ない。Therefore, since the position of the main flow of air does not change from when the intake throttle valve 9' is closed to when the intake throttle valve 9' is open, the swirl formed in the cylinder 1 is strongest at each valve opening, and the swirl is disturbed. The combustion is stable and there are fewer misfires.
なお、切欠き２３は、第７図に示すように、回転軸２０
上の流路中心に立てた垂線より左右に６００位の範囲に
設けることが望ましい。Note that the notch 23 is formed on the rotating shaft 20 as shown in FIG.
It is desirable to provide it within a range of approximately 600 degrees to the left and right of the perpendicular line erected at the center of the upper flow path.
第８図は本発明による他の実施例の吸気絞り弁を示す断
面図であり、第９図は第８図のＩＸ−ＩＸ矢視断面図で
ある。FIG. 8 is a sectional view showing an intake throttle valve according to another embodiment of the present invention, and FIG. 9 is a sectional view taken along the line IX-IX in FIG.
図において、弁体２４は、片面が平面で、他の面が円弧
の一部を切断した半月形の断面をなし、上記円弧側を上
流側に臨ませ、同円弧に接するように回転軸２０が設け
られている。In the figure, the valve body 24 has one side that is flat and the other side that has a half-moon-shaped cross section obtained by cutting a part of an arc, with the arc side facing the upstream side, and the rotating shaft 24 so as to be in contact with the arc. is provided.
また、弁体２４は、流路の軸心に対して直角に閉鎖され
ることがない様に、傾斜しており、下流側に位置した回
転半径の最も大きい部分に、上記回転軸２０と平行に切
断された切欠き２５が設けられている。In addition, the valve body 24 is inclined so as not to be closed at right angles to the axis of the flow path, and is placed parallel to the rotation axis 20 at a portion of the largest rotation radius located on the downstream side. A cutout 25 is provided.
切欠き２５の代りに孔を設けてもよい。A hole may be provided instead of the notch 25.
ざらに流路の断面は円形に限らず矩形であっても同様に
弁体２４を設けることができる。The valve body 24 can be similarly provided even if the cross section of the flow path is not limited to a circular shape but a rectangular shape.
本実施例の場合の作用、効果は前記した実施例の場合と
同じである。The functions and effects of this embodiment are the same as those of the embodiment described above.
第１図は従来の吸気絞り弁を装着した筒内燃料噴射式火
花点火機関の要部を示す断面図、第２図は第１図の機関
の着火燃焼方式を示す説明図、第３図は第１図の吸気絞
り弁の１例を拡大して示す断面図、第４図は同じく他の
例を拡大して示す断面図、第５図は本発明によるｌ実施
例の吸気絞り弁を装着した機関の要部を示す断面図、第
６図は第５図の吸気絞り弁を拡大して示す断面図、第７
図は第６図の■−■矢視断面図、第８図は本発明による
他の実施例の吸気絞り弁を示す断面図、第９図は第８図
の■−■矢視断面図である。
１・・・・・・シリンダ、２・・・・・・ピストン、３
・・・・・・シリンダヘッド、４・・・・・・燃料噴射
ノズル、５・・・・・・点火栓、６・・・・・・吸気弁
、７・・・・・・吸気ポート、８・・・・・・給気管、
９，９′・・・・・・吸気絞り弁、ＩＬ２１，２２゜２
４・・・・・・弁体、１２ 、２０・・・・・・回転軸
、１３゜２３ 、２５・・・・・・切欠け、１４・・・
・・・貫通孔。Figure 1 is a sectional view showing the main parts of a conventional in-cylinder fuel injection spark ignition engine equipped with an intake throttle valve, Figure 2 is an explanatory diagram showing the ignition combustion method of the engine in Figure 1, and Figure 3 is an explanatory diagram showing the ignition combustion method of the engine in Figure 1. FIG. 1 is an enlarged sectional view of one example of the intake throttle valve, FIG. 4 is an enlarged sectional view of another example, and FIG. 5 is an enlarged sectional view of an example of the intake throttle valve according to the present invention. Figure 6 is a cross-sectional view showing the main parts of the engine, Figure 6 is an enlarged cross-sectional view of the intake throttle valve in Figure 5, Figure 7 is
The figure is a sectional view taken along the line ■-■ in FIG. 6, FIG. 8 is a sectional view showing an intake throttle valve according to another embodiment of the present invention, and FIG. 9 is a sectional view taken along the be. 1...Cylinder, 2...Piston, 3
... Cylinder head, 4 ... Fuel injection nozzle, 5 ... Spark plug, 6 ... Intake valve, 7 ... Intake port, 8...Air supply pipe,
9,9'...Intake throttle valve, IL21,22゜2
4... Valve body, 12, 20... Rotating shaft, 13°23, 25... Notch, 14...
...Through hole.
Claims (1)
気絞り弁において、上記吸気絞り弁の吸気流れの最大絞
り位置で、同吸気絞り弁の回転軸の一方側の弁体部分が
流路に直角または上流側に向って傾斜し、かつ他方側の
弁体部分は上記一方側の弁体部分の傾斜角より大きく下
流側に向って傾斜した姿勢に形成されると共に、上記他
方側の弁体部分の上記回転軸より最も離れた区画に吸気
が流過する切欠きまたは貫通孔を設けたことを特徴とす
る筒内燃料噴射式火花点火機関の吸気絞り弁1. In a butterfly-type intake throttle valve installed in the intake passage of an internal combustion engine, at the maximum throttle position of the intake flow of the intake throttle valve, the valve body portion on one side of the rotation axis of the intake throttle valve is perpendicular to the flow path. or the valve body portion on the other side is formed to be inclined toward the downstream side at a larger inclination angle than the valve body portion on the one side, and the valve body portion on the other side is inclined toward the upstream side. An intake throttle valve for an in-cylinder fuel injection type spark ignition engine, characterized in that a notch or a through hole through which intake air flows is provided in a section farthest from the rotation axis of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8354377A JPS5825855B2 (en) | 1977-07-14 | 1977-07-14 | Intake throttle valve for in-cylinder fuel injection spark ignition engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8354377A JPS5825855B2 (en) | 1977-07-14 | 1977-07-14 | Intake throttle valve for in-cylinder fuel injection spark ignition engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5419009A JPS5419009A (en) | 1979-02-13 |
| JPS5825855B2 true JPS5825855B2 (en) | 1983-05-30 |
Family
ID=13805413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8354377A Expired JPS5825855B2 (en) | 1977-07-14 | 1977-07-14 | Intake throttle valve for in-cylinder fuel injection spark ignition engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5825855B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60107105U (en) * | 1983-12-26 | 1985-07-20 | 光洋機械産業株式会社 | Asphalt waste heating machine |
| JPH0874585A (en) * | 1994-08-31 | 1996-03-19 | Yamaha Motor Co Ltd | Intake controller of four-cycle engine |
| DE19928473A1 (en) * | 1999-06-22 | 2000-12-28 | Pierburg Ag | Throttle body for internal combustion engines |
-
1977
- 1977-07-14 JP JP8354377A patent/JPS5825855B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5419009A (en) | 1979-02-13 |
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