JPH06100161B2 - Fuel injection engine - Google Patents
Fuel injection engineInfo
- Publication number
- JPH06100161B2 JPH06100161B2 JP60090161A JP9016185A JPH06100161B2 JP H06100161 B2 JPH06100161 B2 JP H06100161B2 JP 60090161 A JP60090161 A JP 60090161A JP 9016185 A JP9016185 A JP 9016185A JP H06100161 B2 JPH06100161 B2 JP H06100161B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injection
- fuel injection
- ports
- port
- 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
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- Fuel-Injection Apparatus (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、燃料噴射式エンジン、特に２つの吸気ポート
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。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection engine, and more particularly to an engine in which two intake ports are joined upstream and a fuel injection valve is provided in the joining portion.
［従来技術］ 従来より、上記の如く、２つの吸気ポートを上流で合流
させ、該合流部に燃料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58−178454号公
報参照）。[Prior Art] Conventionally, as described above, a fuel injection type engine in which two intake ports are joined upstream and a fuel injection valve is provided at the joining portion is well known (for example, the actual open sho 58-178454). (See Japanese Patent Publication).
上記のように、２つの吸気ポ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
気ポ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つの吸気ポートを隔てる隔壁に衝突し
て液滴状に集合され、隔壁をつたう流れとなる等、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 described above, when the two intake ports are provided, there is an advantage that the filling amount can be increased. However, when the fuel is injected from the fuel injection valve arranged at the merging portion toward the two intake ports, the injected mist-like fuel collides with the partition wall separating the two intake ports and collects in the form of droplets. Therefore, there is still room for improvement in terms of fuel vaporization / atomization performance, such as flow through a partition wall.
本出願人は、特願昭59−77236号特許願（昭和59年４月1
7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つの吸気ポートの隔壁に衝突させることなく各
吸気ポ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 applicant of the present invention is the Japanese Patent Application No. 59-77236 (April 1, 1984).
(7th application), a fuel injection engine having two fuel injection ports is already provided to direct the fuel injected from each fuel injection port to each intake port without colliding with the partition wall of the two intake ports. is suggesting.
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 application of the applicant of the present application, the vaporization / atomization characteristics of the injected fuel can be basically 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ても、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, even in an engine equipped with such a fuel injection valve having two injection ports, it is desired to further improve the combustibility and improve the fuel consumption performance.
［発明の目的］ 本発明の目的は、２つの吸気ポ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。[Object of the Invention] An object of the present invention is to optimize the injection characteristics between the injection ports in relation to the installation position of the spark plug when the two injection ports are provided in the fuel injection valve arranged at the junction of the two intake ports. The setting is to improve the flammability and eventually the fuel efficiency.
［発明の構成］ このため、本発明は、２つの吸気ポ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
一方の吸気ポートに偏せて配置し、かつ、点火プラグに
近い吸気ポ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。Therefore, according to the present invention, the injection port diameters of the two injection ports provided in the fuel injection valve arranged at the confluence portion where the two intake ports are merged are set to be different in size. The fuel injection valve is arranged so as to be biased to one of the intake ports, and the fuel injection valve is arranged so that the injection port having a large injection port diameter is directed to the intake port near the ignition plug.
［発明の効果］ 本発明によれば、各吸気ポ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ができ、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。EFFECTS OF THE INVENTION According to the present invention, fuel can be injected directly toward each intake port, and the injected fuel can be concentrated around the spark plug to enrich the air-fuel mixture. It is possible to improve the ignitability of the air, and thus improve the combustibility and the fuel efficiency.
［実施例］ 以下、本発明の実施例を具体的に説明する。[Examples] 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つの吸気ポート2,3が開口されるととも
に、一つの排気ポート４が開口されている。これら２つ
の吸気ポート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つの吸気ポート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、一方の吸気ポート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 ports 2 and 3 and one exhaust port 4 opened. These two intake ports 2 and 3 are merged into one on the upstream side,
A fuel injection valve 6 having two injection ports is arranged at the confluence portion 5 so as to direct the two intake ports 2 and 3. Further, the spark plug 7 is arranged so as to be biased toward one intake port 2 side.
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。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
に近い吸気ポート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
気ポート３に指向させる。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. The nozzle diameters of these two nozzles 9 and 10 are set to be different in size, and the nozzle hole 9 having a large nozzle diameter is the spark plug 7
The injection port 10 having a small injection port diameter is directed to the intake port 3 located at a position distant from the spark plug 7, while being directed to the intake port 2 close to.
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, the fuel injection valve 6 causes the needle valve 11 to retract when the built-in electromagnetic coil is excited, and the needle valve 11 retracts to inject fuel from the injection ports 9 and 10. It has a well-known structure.
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 injection ports 9'and 10 'may be provided in the 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
に近い吸気ポート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から遠い吸気ポート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
気ポート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。When the fuel injection valve 6 having the two injection holes is arranged as described above, the spark plug 7 is exemplarily shown in FIG.
A large amount of fuel is injected from the large injection port 9 into the intake port 2 close to
A small amount of fuel is injected and supplied from the injection port 10 having a small injection port diameter without colliding with the partition wall 13 separating the two intake ports 2 and 3, respectively.
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,
Due to the spark ignition of the spark plug 7, the air-fuel mixture around the spark plug 7 is satisfactorily ignited, and the combustion progresses 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 the fuel supplied from the two injection ports 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O2
フィードバック制御領域では、点火プラグ７付近の空燃
比を約13.0、他方の吸気ポート３側の空燃比を16.4程度
とする。O 2 that controls the air-fuel mixture to the theoretical air-fuel ratio (A / F = 14.7)
In the feedback control region, the air-fuel ratio near the spark plug 7 is set to about 13.0 and the air-fuel ratio on the other intake port 3 side is set to about 16.4.
また、O2フィードバッ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。Further, in the region where the O 2 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 it is possible to operate with the air-fuel ratio 20 as a whole.
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い。As described above, in the configuration of the present invention, a rich air-fuel mixture can be generated in the vicinity of the spark plug 7, so that even if the overall air-fuel ratio is lean-set, the ignitability is secured well and the combustibility is hindered. There is no such thing.
なお、上記の実施例で示した空燃比の設定例は、あくま
で一例にすぎず、これに限定されるものではない。The example of setting the air-fuel ratio shown in the above embodiment is merely an example, and the present invention is not limited to this.
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…吸気ポート、７…点火プラグ、 ６…燃料噴射弁、 （9,10），（９′,10′）…噴口。FIG. 1 is a sectional explanatory view of one cylinder of an engine according to the present invention, and FIGS. 2 and 3 are sectional views of a tip portion of a fuel injection valve, respectively. 2, 3 ... Intake port, 7 ... Spark plug, 6 ... Fuel injection valve, (9, 10), (9 ', 10') ... Injection port.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平岡 伸 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 (56)参考文献 特開 昭60−111021（ＪＰ，Ａ) 実開 昭59−123660（ＪＰ，Ｕ) ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Shin Hiraoka 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (56) References JP-A-60-111021 (JP, A) 123660 (JP, U)
Claims (1)
ともに、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 merged on the upstream side and a fuel injection valve is provided at the merged portion, a spark plug is arranged so as to be biased to one intake port side, and A fuel injection engine characterized in that an injection valve is provided with two injection ports for injecting toward each port, and the injection port diameter on the intake port side of the injection ports, which is closer to the ignition plug, is set larger than the other injection port diameter.
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 JPS61247865A (en) | 1986-11-05 |
| JPH06100161B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0631586B2 (en) * | 1986-12-18 | 1994-04-27 | 本田技研工業株式会社 | Fuel injection device for multi-intake valve internal combustion engine |
| JPS6444362U (en) * | 1987-09-14 | 1989-03-16 | ||
| JP2760115B2 (en) * | 1989-12-14 | 1998-05-28 | 三菱自動車工業株式会社 | Fuel injection device and stratified combustion internal combustion engine with fuel injection device |
| WO2006084085A1 (en) | 2005-02-04 | 2006-08-10 | Ismailov Murad M | Liquid spray system and nozzle with improved spray generation |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61247865A (en) | 1986-11-05 |
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