JPS61247865A - Fuel injection type engine - Google Patents
Fuel injection type engineInfo
- Publication number
- JPS61247865A JPS61247865A JP60090161A JP9016185A JPS61247865A JP S61247865 A JPS61247865 A JP S61247865A JP 60090161 A JP60090161 A JP 60090161A JP 9016185 A JP9016185 A JP 9016185A JP S61247865 A JPS61247865 A JP S61247865A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- fuel injection
- fuel
- injection valve
- ports
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野1
本発明は、燃料噴射式エンジン、特に2つの吸気ボート
を上流側で合流させるとともに、該合流部に燃料噴射弁
を設けたエンジンに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application 1] The present invention relates to a fuel injection engine, and particularly to an engine in which two intake boats are merged on an upstream side and a fuel injection valve is provided at the merge portion.
[従来技術1
従来より、上記の如く、2つの吸気ボートを上流で合流
させ、該合流部に燃肩噴射弁を設けた燃料噴射式エンジ
ンはよく知られている(例えば、実開昭58−1784
54号公報参照)。[Prior Art 1] As mentioned above, a fuel injection engine in which two intake boats are joined upstream and a fuel shoulder injection valve is provided at the joining part is well known (for example, in the 1980- 1784
(See Publication No. 54).
上記のように、2つの吸気ボートを設けた場合には、充
填量を増大させることができる利点が得られる。しかし
ながら、合流部に配置する燃料噴射弁から上記2つの吸
気ボートに向けて燃料を噴射した場合、噴射されたミス
ト状の燃料が、2つの吸気ボートを隔てる隔壁に衝突し
て液滴状に集合され、隔壁をったう流れとなる等、燃料
の気化・霧化性能に関しては依然として改善すべき余地
がある。As mentioned above, when two intake boats are provided, an advantage is obtained that the filling amount can be increased. However, when fuel is injected toward the two intake boats from the fuel injection valve located at the confluence, the injected mist fuel collides with the partition wall separating the two intake boats and collects in droplets. There is still room for improvement in the vaporization and atomization performance of the fuel, such as the flow flowing along the partition wall.
本出願人は、特願昭59−77236号特許願(昭和5
9年4月17日出願)において、2つの噴口を有する燃
料噴射弁を設け、2つの吸気ボートの隔壁に衝突させる
ことなく各吸気ボートに各噴口から噴射した燃料を指向
させるようにした燃料噴射式エンジンを既に提案してい
る。The present applicant has applied for patent application No. 59-77236 (Showa 5
(Application filed on April 17, 2009) discloses a fuel injection system in which a fuel injection valve having two nozzles is provided and the fuel injected from each nozzle is directed to each intake boat without colliding with the bulkheads of the two intake boats. The formula engine has already been proposed.
かかる本願出願人の先願発明によれば、噴射燃料の気化
・霧化特性を基本的に向上することがで−きる。According to the prior invention of the present applicant, the vaporization and atomization characteristics of the injected fuel can be fundamentally improved.
しかしながら、このような2つの噴口を有する燃料噴射
弁を備えたエンジンにおいそち、さらに燃焼性を向上さ
せて燃費性能を向上することが望まれる。However, in an engine equipped with such a fuel injection valve having two nozzles, it is desired to further improve combustibility and improve fuel efficiency.
[発明の目的1
本発明の目的は、2つの吸気ボートの合流部に配置され
る燃料噴射弁に2つの噴口を設けるに際して、噴口間の
噴射特性を点火プラグの設置位置との関係で最適に設定
し、燃焼性の向上ひいては燃費性能の向上を図ることで
ある。[Objective of the Invention 1 The object of the present invention is to optimize the injection characteristics between the nozzles in relation to the installation position of the spark plug when two nozzles are provided in a fuel injection valve disposed at the confluence of two intake boats. The aim is to improve combustibility and, by extension, fuel efficiency.
[発明の構成1
このため、本発明は、2つの吸気ボートが合流される合
流部に配置する燃料噴射弁に設ける2つの噴口の噴口径
を大小異ならせて設定する一方、点火プラグはいずれか
一方の吸気ボートに偏せて配置し、かつ、点火プラグに
近い吸気ボートに噴口径の大きい噴口を指向させて燃料
噴射弁を配置して構成したものである。[Configuration 1 of the Invention For this reason, the present invention sets the nozzle diameters of the two nozzles provided in the fuel injection valve disposed at the merging part where two intake boats are joined to be different in size, while the spark plug is The fuel injection valve is arranged so as to be biased toward one intake boat, and the fuel injection valve is arranged so that the nozzle with a large diameter is directed toward the intake boat near the ignition plug.
[発明の効果1
本発明によれば、各吸気ボートに直接に指向させて燃料
を噴射させることができ、しかも点火プラグ周りに噴射
燃料を集中させて混合気をリッチ化することができ、混
合気の着火性を向上させることかでb、ひいては燃焼性
の改善、燃費性能の向上を図ることができる。[Effect of the invention 1] According to the present invention, fuel can be injected directly to each intake boat, and the injected fuel can be concentrated around the spark plug to enrich the mixture. By improving the ignitability of air, it is possible to improve combustibility and fuel efficiency.
【実施例1 以下、本発明の実施例を具体的に説明する。[Example 1 Examples of the present invention will be specifically described below.
第1図にエンジンの一つの気筒について示すように、気
筒1には、2つの吸気ボート2.3が開口されるととも
に、一つの排気ボート4が開口されている。これら2つ
の吸気ボート2,3は、上流側において一つに合流され
、その合流部5には、2つの噴口を有する燃料噴射弁6
が2つの吸気ボー)2.3を指向するように配置されて
いる。また、点火プラグ7は、一方の吸気ボート2側に
偏せて配置している。As shown in FIG. 1 for one cylinder of the engine, the cylinder 1 has two intake boats 2.3 and one exhaust boat 4 opened therein. These two intake boats 2 and 3 are merged into one on the upstream side, and the merge part 5 has a fuel injection valve 6 having two injection ports.
is arranged so that it points toward the two intake bows) 2.3. Further, the spark plug 7 is arranged to be biased toward one side of the intake boat 2.
第2図に示すように、上記燃料噴射弁6は、ノズルチッ
プ8の先端に形成された2つの噴口9゜10を有する。As shown in FIG. 2, the fuel injection valve 6 has two injection ports 9 and 10 formed at the tip of the nozzle tip 8. As shown in FIG.
これら2つの噴口9,10の噴口径は、大小異ならせて
設定されており、大きい噴口径を有する噴口9は、点火
プラグ7に近い吸気ボート2に指向させる一方、小さい
噴口径を有する噴口10は、点火プラグ7から離れた位
置にある吸気ボート3に指向させる。The nozzle diameters of these two nozzle holes 9 and 10 are set to be different in size, and the nozzle nozzle 9 with a large nozzle diameter is directed toward the intake boat 2 near the ignition plug 7, while the nozzle nozzle 10 with a small nozzle diameter is directed to the intake boat 3 located away from the spark plug 7.
なお、この燃料噴射弁6は、具体的に図示しないが、内
蔵した電磁コイルが励磁されたとき、ニードル弁11を
後退させ、このニードル弁11の後退によって各噴口9
,10から燃料が噴射されるようになった周知の構造を
有する。Although not specifically shown in the drawings, when the built-in electromagnetic coil is excited, this fuel injection valve 6 causes the needle valve 11 to move backward, and as the needle valve 11 moves back, each injection port 9
, 10 has a well-known structure in which fuel is injected from them.
また、第3図に示すように、噴口9’、10”は、ノズ
ルチップ8゛先端に取付けるキャップ体12に設けるよ
うにしてもよい。Further, as shown in FIG. 3, the spout ports 9' and 10'' may be provided in a cap body 12 attached to the tip of the nozzle tip 8'.
上記のように、2つの噴口を有する燃料噴射弁6を配置
した場合、第1図に例示的に示すように、点火プラグ7
に近い吸気ボート2には、噴口径の大きい噴口9から多
量の燃料が、点火プラグ7カ・ら遠い吸気ボート3には
、噴口径の小さい噴口10から少量の燃料が夫々、2つ
の吸気ボート2.3を隔てている隔壁13に衝突するこ
となしに噴射供給されることになる。As described above, when the fuel injection valve 6 having two nozzles is arranged, as exemplarily shown in FIG.
A large amount of fuel is supplied to the intake boat 2 near the spark plug 7 from the nozzle 9 with a large nozzle diameter, and a small amount of fuel is supplied from the nozzle 10 with a small nozzle diameter to the intake boat 3 far from the spark plug 7. This means that the fuel will be injected and supplied without colliding with the partition wall 13 that separates the parts 2 and 3.
その結果、点火プラグ7周囲の混合気はリッチとなり、
点火プラグ7の火花点火により点火プラグ7周囲の混合
気は良好に着火し、このリッチな混合気を核にして燃焼
が燃焼室の全体に進行する。As a result, the air-fuel mixture around the spark plug 7 becomes rich.
The air-fuel mixture around the spark plug 7 is ignited well by the spark ignition of the spark plug 7, and combustion proceeds throughout the combustion chamber with this rich air-fuel mixture as the nucleus.
上記2つの噴口9.10(9’、10”)から供給する
燃料の比率は、例えば、以下の如くに設定することが好
ましい。The ratio of fuel supplied from the two nozzles 9.10 (9', 10'') is preferably set as follows, for example.
いま、理論空燃比(A/F=14.7)に混合気を制御
する0□フイードバツク制御領域では、点火プラグ7付
近の空燃比を約13.0、他方の吸気ボート3側の空燃
比を16.4程度とする。Now, in the 0□ feedback control region where the air-fuel mixture is controlled to the stoichiometric air-fuel ratio (A/F = 14.7), the air-fuel ratio near the spark plug 7 is set to approximately 13.0, and the air-fuel ratio on the other side of the intake boat 3 is set to approximately 13.0. It should be about 16.4.
また、0□フイードバツク制御を行なわない領域では、
点火プラグ7側で空燃比を14.7、他側で25.3と
なるように設定し、全体では、空燃比20で運転させる
ことができる。In addition, in the area where 0□ feedback control is not performed,
The air-fuel ratio is set to 14.7 on the spark plug 7 side and 25.3 on the other side, and the entire engine can be operated at an air-fuel ratio of 20.
上記したように、本発明の構成では、点火プラグ7付近
にリッチな混合気を生成できるので、全体の空燃比をリ
ーンセットしたとしても、着火性は良好に確保され、燃
焼性が阻害されることはななお、上記の実施例で示した
空燃比の設定例は、あくまで−例にすぎず、これに限定
されるものではない。As described above, with the configuration of the present invention, a rich air-fuel mixture can be generated near the spark plug 7, so even if the overall air-fuel ratio is set lean, ignitability is ensured well and combustibility is inhibited. Of course, the air-fuel ratio setting examples shown in the above embodiments are merely examples, and the present invention is not limited thereto.
第1図は本発明に係るエンジンの一つの気筒の断面説明
図、第2図、第3図は夫々燃料噴射弁の先端部の断面図
である。
2.3・・・吸気ボート、 7・・・点火プラグ、
6・・・燃料噴射弁、
(9,10)、(9”、10’)・・・噴口。FIG. 1 is an explanatory sectional view of one cylinder of an engine according to the present invention, and FIGS. 2 and 3 are sectional views of the tip of a fuel injection valve, respectively. 2.3...Intake boat, 7...Spark plug,
6...Fuel injection valve, (9, 10), (9", 10')...Nozzle port.
Claims (1)
に、該合流部に燃料噴射弁を設けた燃料噴射式エンジン
において、 点火プラグを一方の吸気ポート側に偏らせて配置すると
ともに、燃料噴射弁に各ポートに向けて噴射する2つの
噴口を設け、該噴口のうち点火プラグに近い吸気ポート
側の噴口径を他方の噴口径より大きく設定したことを特
徴とする燃料噴射式エンジン。(1) In a fuel injection engine in which two intake ports are joined on the upstream side and a fuel injection valve is provided at the joining part, the spark plug is placed biased toward one intake port, and the fuel injection valve A fuel injection type engine characterized in that two nozzles are provided for injecting fuel toward each port, and the diameter of the nozzle on the intake port side closer to the ignition plug is set larger than the diameter of the other nozzle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60090161A JPH06100161B2 (en) | 1985-04-25 | 1985-04-25 | Fuel injection engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60090161A JPH06100161B2 (en) | 1985-04-25 | 1985-04-25 | Fuel injection engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61247865A true JPS61247865A (en) | 1986-11-05 |
JPH06100161B2 JPH06100161B2 (en) | 1994-12-12 |
Family
ID=13990765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60090161A Expired - Lifetime JPH06100161B2 (en) | 1985-04-25 | 1985-04-25 | Fuel injection engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06100161B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63154859A (en) * | 1986-12-18 | 1988-06-28 | Honda Motor Co Ltd | Fuel injection device for multisuction valve type internal combustion engine |
JPS6444362U (en) * | 1987-09-14 | 1989-03-16 | ||
JPH03185266A (en) * | 1989-12-14 | 1991-08-13 | Mitsubishi Motors Corp | Fuel injection device and stratified combustion type internal combustion engine equipped therewith |
US8096280B2 (en) | 2005-02-04 | 2012-01-17 | AADI Inc. | Fuel injection system and fuel injector with improved spray generation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59123660U (en) * | 1983-02-10 | 1984-08-20 | トヨタ自動車株式会社 | Fuel injection valve for electronically controlled engines |
JPS60111021A (en) * | 1983-11-18 | 1985-06-17 | Honda Motor Co Ltd | Three-valve type internal-combustion engine with fuel injection device |
-
1985
- 1985-04-25 JP JP60090161A patent/JPH06100161B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59123660U (en) * | 1983-02-10 | 1984-08-20 | トヨタ自動車株式会社 | Fuel injection valve for electronically controlled engines |
JPS60111021A (en) * | 1983-11-18 | 1985-06-17 | Honda Motor Co Ltd | Three-valve type internal-combustion engine with fuel injection device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63154859A (en) * | 1986-12-18 | 1988-06-28 | Honda Motor Co Ltd | Fuel injection device for multisuction valve type internal combustion engine |
JPS6444362U (en) * | 1987-09-14 | 1989-03-16 | ||
JPH03185266A (en) * | 1989-12-14 | 1991-08-13 | Mitsubishi Motors Corp | Fuel injection device and stratified combustion type internal combustion engine equipped therewith |
US8096280B2 (en) | 2005-02-04 | 2012-01-17 | AADI Inc. | Fuel injection system and fuel injector with improved spray generation |
Also Published As
Publication number | Publication date |
---|---|
JPH06100161B2 (en) | 1994-12-12 |
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