JPS6022071A - Fuel injection valve - Google Patents
Fuel injection valveInfo
- Publication number
- JPS6022071A JPS6022071A JP12875183A JP12875183A JPS6022071A JP S6022071 A JPS6022071 A JP S6022071A JP 12875183 A JP12875183 A JP 12875183A JP 12875183 A JP12875183 A JP 12875183A JP S6022071 A JPS6022071 A JP S6022071A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- nozzle
- nozzle tip
- injection valve
- needle valve
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
」〈発明は内燃機関の燃料噴射弁に関する・第１図に従
来のこの捗の燃料噴射弁の構造を示す。図において、ノ
ズルチップ１１はキャップ１２によってノズル本体１３
にねじ込み固定されている。ノズルチップ１工内にはソ
ート１４に着座する針弁１５があり、突棒１６．ばね受
１７全通してばね１８で針弁１５をシート１４に押し付
けている。さらにばね１８の上！′７．ＩＭ部のばね受
１９の位置をロックナツト２０をいったんゆるめて変え
ることによシ針弁１５の啓開圧力を変えることができる
。図示していない高圧管からの燃料は高圧管継手２１か
らノズル本体１３に入り２通路２２をへてノズルチップ
１工内の通路２３を通り油溜２４に至る。さらに、針弁
１５が開くとノズル孔２５から図示していないシリンダ
へ燃料が噴射される。DETAILED DESCRIPTION OF THE INVENTION The invention relates to a fuel injection valve for an internal combustion engine. FIG. 1 shows the structure of a conventional fuel injection valve of this type. In the figure, the nozzle tip 11 is connected to the nozzle body 13 by the cap 12.
It is screwed into place. Inside the nozzle tip 1, there is a needle valve 15 seated on a sort 14, and a protruding rod 16. The needle valve 15 is pressed against the seat 14 by a spring 18 through which the spring receiver 17 passes completely. Furthermore, on top of spring 18! '7. By once loosening the lock nut 20 and changing the position of the spring receiver 19 of the IM section, the opening pressure of the needle valve 15 can be changed. Fuel from a high-pressure pipe (not shown) enters the nozzle body 13 from a high-pressure pipe joint 21, passes through two passages 22, passes through a passage 23 in the nozzle tip 1, and reaches an oil sump 24. Furthermore, when the needle valve 15 opens, fuel is injected from the nozzle hole 25 into a cylinder (not shown).
第２図に燃料噴射の原理を示す特性曲線図を示す。横軸
は高圧管内の流速を示し、縦軸は圧力を示す。直線ａは
噴射前に噴射弁から帰ってきている反射波であシ、噴射
ポンプによシ高圧管のポンプ側入口の流速がｖｌに上げ
られるとポンプ（ＩＩＩ入口は直線ａ上の点Ｘｌで示す
状態となる。この点ｘ１の状態が進行波すによ２て噴射
弁に伝えられ。FIG. 2 shows a characteristic curve diagram showing the principle of fuel injection. The horizontal axis shows the flow velocity in the high-pressure pipe, and the vertical axis shows the pressure. Line a is the reflected wave that returns from the injection valve before injection.When the flow velocity at the pump-side inlet of the high-pressure pipe to the injection pump is increased to vl, the pump (III inlet is at point Xl on straight line a). The state at point x1 is transmitted to the injection valve by the traveling wave 2.
噴射弁の絞、！２特性線ｎ工との交点Ｙ２が噴射弁での
状態となる。即ち、交点Ｙ２の圧力Ｐ２で燃料をｌｌｊ
ｏｏ（躬する。Throttle the injection valve! 2. The intersection point Y2 with the characteristic line n is the state of the injection valve. That is, the fuel is llj at the pressure P2 at the intersection Y2.
oo (to err.
以１−は機関が最高回転速度で作動しているときの、ｌ
＜７； ｌ＝ｌ噴射の状況である。The following 1- is l when the engine is operating at maximum rotational speed.
<7; This is a situation of l=l injection.
Ｐ” ｌ：ｊｌが低速になると噴射ポンプ、駆動のカム
速度が下がる／こめ高圧管のポンプ側入口の流速がυ３
寸で低下する。このためポンブイ１１１１人口は点Ｘ３
で示す状態となシ、進行波Ｃによって噴射弁に伝えられ
る。その結果、噴射弁での状態−：交点Ｙ４となり、交
点Ｙ４の圧力Ｐ４で燃料を噴射する。P” l: When jl becomes low speed, the injection pump and drive cam speed decreases/The flow speed at the pump side inlet of the high pressure pipe is υ3
decreases in size. Therefore, the population of Ponbui 1111 is point X3
In the state shown in , the traveling wave C is transmitted to the injection valve. As a result, the state at the injection valve becomes intersection Y4, and fuel is injected at the pressure P4 at intersection Y4.
上記のものには次の欠点がある。The above has the following drawbacks.
＋’Ａ Ｉ：’、＋が低速になると噴射弁での燃料噴射
の圧力がＰ２からＰ４まで低下する。この噴射圧力の低
下により１１ガ（焼室内での燃料噴霧のイネトレージョ
ンが低下し、空気と燃料の混合が充分行われなくなり燃
（：！”；が悪化する。その結果、燃費が悪化し。+'A I:', when + becomes low speed, the pressure of fuel injection at the injection valve decreases from P2 to P4. As a result of this decrease in injection pressure, the inetration of the fuel spray in the combustion chamber decreases, preventing sufficient mixing of air and fuel and deteriorating the fuel efficiency.As a result, fuel efficiency deteriorates. .
煙り濃度が増大する不具合が生じている。A problem has occurred where the smoke density increases.
本発明の目的は上記の点に着目し１機関の低速Ｅ１キの
燃料噴躬圧を高め、燃費と煙シπ′′度の改善を実現で
きる燃木１噴射弁を゛提供することであシ、その特ｒ）
゛（とするところは、内燃機関の燃料噴射弁において、
ノズルチップと針弁との間に介装されたスリーブ、上記
ノズルテップとスリーブのそれぞれの下端部局壁部分を
貫通して形成されたノズル孔ｐ上記スリーブを外部から
の伺勢により回動させて上記ノズル孔の通路面積を絞る
絞シ装置を備えたことである。The purpose of the present invention is to focus on the above-mentioned points and provide a fuel injection valve that can increase the fuel injection pressure at low speed E1 of a single engine and improve fuel efficiency and smoke intensity. shi, its special r)
゛(In the fuel injection valve of an internal combustion engine,
A sleeve is interposed between the nozzle tip and the needle valve, and a nozzle hole p is formed through the lower end local wall portion of each of the nozzle tip and the sleeve.The sleeve is rotated by an external force. The present invention is equipped with a throttling device that narrows down the passage area of the nozzle hole.
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３図は本発明による１実施例の燃料噴射弁を示す断面
図である。FIG. 3 is a sectional view showing one embodiment of a fuel injection valve according to the present invention.
図において、ノズルテップ１１と針弁１５の間に円筒状
のスリーブ３１を設ける。スリーブ３１は先端が円錐状
になっており、ばね３２の力でノズルチップ１１の同じ
く円錐状の孔部に着座している。また、スリーブ３１に
は通路孔３３が設けられておシ２通路２３からの燃料を
油溜２４に送っている。さらにスリーブ３１の光幅：部
にはシート１４が設けられており、針弁１５が着座する
。In the figure, a cylindrical sleeve 31 is provided between the nozzle tip 11 and the needle valve 15. The sleeve 31 has a conical tip and is seated in the similarly conical hole of the nozzle tip 11 by the force of a spring 32. Further, a passage hole 33 is provided in the sleeve 31 to send fuel from the second passage 23 to the oil sump 24. Further, a seat 14 is provided in the light width portion of the sleeve 31, on which a needle valve 15 is seated.
ノズル孔２５はスリーブ３１及びノズルチップ０１１を
通して形成する。スリーブ３１とノズルチップ１１のそ
れぞれの下端部局１ｔ、ｉ部分を貫通して形成されてい
る。The nozzle hole 25 is formed through the sleeve 31 and the nozzle tip 011. It is formed to penetrate through the lower end portions It and i of the sleeve 31 and the nozzle tip 11, respectively.
スリーブ；う■は外部から駆動できる回動軸３４の先端
部に設けたレバー３５で回動する。The sleeve (U) is rotated by a lever 35 provided at the tip of a rotation shaft 34 that can be driven from the outside.
この部分の詳細を第４図に示す。レバー３５の回動によ
りスリーブ３１は針弁１５とノズルチップＩＪの間をス
リーブに設けた溝３６とノズルチップ１１に固定されて
いるピン３７の隙間分だけ回動する。Details of this part are shown in FIG. The rotation of the lever 35 causes the sleeve 31 to rotate by the gap between the pin 37 fixed to the nozzle tip 11 and the groove 36 provided in the sleeve between the needle valve 15 and the nozzle tip IJ.
上記構成の場合の作用について述べる。The operation in the case of the above configuration will be described.
機関が最高回転速度で作動している場合は、ノズル孔２
５は現状と同じ通路面積を確保する。When the engine is running at maximum speed, nozzle hole 2
5 will ensure the same aisle area as the current one.
機関が低速になった場合、外部から回動軸３４を回動さ
せ、レバー３５によってスリーブ３１ｅ回動させる。そ
の結果、第５図に示すように、ノズル孔２５の最小通路
面積は斜線部Ａで示すように小さくなる。When the engine speed becomes low, the rotation shaft 34 is rotated from the outside, and the sleeve 31e is rotated by the lever 35. As a result, as shown in FIG. 5, the minimum passage area of the nozzle hole 25 becomes smaller as indicated by the shaded area A.
上述の」、１合には次のジノｌ果がある。The above-mentioned ``1'' has the following ``Jinol''.
機関が低速で作動する場合９回動軸３４によりスリーブ
３１を回動させノズル孔２５の最小通路面積を小さくす
る。その結果、第２図の特性曲線図で、噴射弁の絞り特
性線はｎ２のように絞られ。When the engine operates at low speed, the sleeve 31 is rotated by the rotation shaft 34 to reduce the minimum passage area of the nozzle hole 25. As a result, in the characteristic curve diagram of FIG. 2, the throttle characteristic line of the injection valve is narrowed down as indicated by n2.
高圧管のポンプ０佃入口の流速がυ３でも噴射弁での状
態は交点Ｙ５となシ、交点Ｙ５の圧力ｐｓｉで燃料の噴
射圧力が高くなる。Even if the flow velocity at the pump 0 inlet of the high pressure pipe is υ3, the state at the injection valve is at the intersection Y5, and the fuel injection pressure becomes high at the pressure psi at the intersection Y5.
このため低速での燃費及び煙り濃度の改善を実現するこ
とができる。Therefore, it is possible to improve fuel efficiency and smoke density at low speeds.
また、構造的にスリーブ３１の先端を円錐状にしてノズ
ルチップ１１に着座させている。この結果、針弁１５と
同様に着座部分の摺合せ加工が可能となり、ノズル孔２
５部分のノズルチップ０１１とスリーブ３１の間の隙間
を最小にし、漏れを防ぎ、実用的なものとすることがで
きる・Further, structurally, the tip of the sleeve 31 is made conical and is seated on the nozzle tip 11. As a result, similar to the needle valve 15, it is possible to perform sliding processing on the seating part, and the nozzle hole 2
The gap between the 5-part nozzle tip 011 and the sleeve 31 can be minimized to prevent leakage and be practical.
第１図は従来の燃料噴射弁を示す断面図、第２図は燃料
噴射の原理を示す特性的縮図、第３図は本発明による１
実施例の燃料噴射弁？示す断面図。
第４図は第３図の■−■矢視断面図、第５図は第３図の
■矢視図である。
１１・・・ノズルテッゾ、１５・・針弁、２５・・・ノ
ズル孔、３１・・・スリーブ。
′Ａ＝２（財）
汁３図
第４図
米５図
第１頁の続き
■出 願 人 三菱自動車工業株式会社東京都港区芝５
丁目３３番８号Fig. 1 is a sectional view showing a conventional fuel injection valve, Fig. 2 is a characteristic miniature showing the principle of fuel injection, and Fig. 3 is a sectional view of a conventional fuel injection valve.
Example fuel injection valve? A sectional view shown. FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. 5 is a view taken along the arrow ■ in FIG. 11... Nozzle Tezzo, 15... Needle valve, 25... Nozzle hole, 31... Sleeve. 'A=2 (Foundation) Figure 3 Figure 4 Figure 5 Continuation of Figure 1 Page ■Applicant Mitsubishi Motors Corporation 5, Shiba, Minato-ku, Tokyo
Chome 33-8
Claims (1)
弁との間に介装されたスリーブ、上記ノズルチップとス
リーブのそ九そ７″Ｌの上端部周壁部分をｊｔ西して形
成されたノズル孔、上記スリーブを外部からの付勢によ
ｐ回動させて上記ノズル孔の通路面績を絞る絞ｐ装置を
備えたことを特徴とする燃料噴射弁。■ In a fuel injection valve for an internal combustion engine, a sleeve is interposed between a nozzle tip and a needle valve, and a nozzle is formed by extending the circumferential wall of the upper end of the nozzle tip and the sleeve at 7"L. A fuel injection valve characterized in that the fuel injection valve is equipped with a throttle device that narrows the passage surface area of the nozzle hole by rotating the hole and the sleeve by an external force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12875183A JPS6022071A (en) | 1983-07-16 | 1983-07-16 | Fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12875183A JPS6022071A (en) | 1983-07-16 | 1983-07-16 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6022071A true JPS6022071A (en) | 1985-02-04 |
| JPH0425432B2 JPH0425432B2 (en) | 1992-04-30 |
Family
ID=14992560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12875183A Granted JPS6022071A (en) | 1983-07-16 | 1983-07-16 | Fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6022071A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127584A (en) * | 1991-05-06 | 1992-07-07 | General Motors Corporation | Fuel injection nozzle |
| WO1994010440A1 (en) * | 1992-10-23 | 1994-05-11 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh | Fuel injection nozzle for internal combustion engines |
| WO1996009472A1 (en) * | 1994-09-22 | 1996-03-28 | Zexel Corporation | Fuel injection nozzle |
| WO1996041948A1 (en) * | 1995-06-09 | 1996-12-27 | Zexel Corporation | Fuel injection nozzle having a variable nozzle hole area |
| US5947389A (en) * | 1996-06-06 | 1999-09-07 | Zexel Corporation | Variable nozzle hole type fuel injection nozzle |
| EP1030054A2 (en) * | 1999-02-16 | 2000-08-23 | Delphi Technologies, Inc. | Fuel injector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5447029A (en) * | 1977-09-01 | 1979-04-13 | Sulzer Ag | Jet valve for reciprocating internal combustion machine |
-
1983
- 1983-07-16 JP JP12875183A patent/JPS6022071A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5447029A (en) * | 1977-09-01 | 1979-04-13 | Sulzer Ag | Jet valve for reciprocating internal combustion machine |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127584A (en) * | 1991-05-06 | 1992-07-07 | General Motors Corporation | Fuel injection nozzle |
| WO1994010440A1 (en) * | 1992-10-23 | 1994-05-11 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh | Fuel injection nozzle for internal combustion engines |
| WO1996009472A1 (en) * | 1994-09-22 | 1996-03-28 | Zexel Corporation | Fuel injection nozzle |
| GB2307007A (en) * | 1994-09-22 | 1997-05-14 | Zexel Corp | Fuel injection nozzle |
| GB2307007B (en) * | 1994-09-22 | 1998-08-12 | Zexel Corp | Fuel injection nozzle |
| WO1996041948A1 (en) * | 1995-06-09 | 1996-12-27 | Zexel Corporation | Fuel injection nozzle having a variable nozzle hole area |
| GB2316130A (en) * | 1995-06-09 | 1998-02-18 | Zexel Corp | Fuel injection nozzle having a variable nozzle hole area |
| GB2316130B (en) * | 1995-06-09 | 1999-05-05 | Zexel Corp | Variable nozzle hole type fuel injection nozzle |
| US5947389A (en) * | 1996-06-06 | 1999-09-07 | Zexel Corporation | Variable nozzle hole type fuel injection nozzle |
| EP1030054A2 (en) * | 1999-02-16 | 2000-08-23 | Delphi Technologies, Inc. | Fuel injector |
| EP1030054A3 (en) * | 1999-02-16 | 2002-08-07 | Delphi Technologies, Inc. | Fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0425432B2 (en) | 1992-04-30 |
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