JPS59206673A - Injector-nozzle for fuel of diesel engine - Google Patents
Injector-nozzle for fuel of diesel engineInfo
- Publication number
- JPS59206673A JPS59206673A JP59071694A JP7169484A JPS59206673A JP S59206673 A JPS59206673 A JP S59206673A JP 59071694 A JP59071694 A JP 59071694A JP 7169484 A JP7169484 A JP 7169484A JP S59206673 A JPS59206673 A JP S59206673A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- chamber
- fuel
- nozzle
- tip
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims description 30
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 210000003127 knee Anatomy 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 244000000626 Daucus carota Species 0.000 description 2
- 235000002767 Daucus carota Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007123 defense Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
-
- 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
- F02M61/16—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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1846—Dimensional characteristics of discharge orifices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、ディーゼルエンジンの燃お１用インジエクタ
・ノズルに関し、殊に以下の構成をイｉりるタイプのも
のに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injector nozzle for a diesel engine, and particularly to a type having the following configuration.
すなわら、ボデーは、筒状案内穴と、該筒状案内穴が間
口している圧力室と、該圧力室に間口して燃料を圧力下
に供給するだめの供給通路ど、上記圧力室に連通づると
ともに上記筒状案内穴の直径より小さな開口直径を備え
た円鍾状弁月６と、■１い突出端と、該突出端内に形成
されるとともに、上記円錐状弁座が開口している筒部を
有づる〒°ど、該室内に形成された少なくとも１つの燃
料１１．ｆＩ口・ｊ孔どを備え；上記ニー１−ル・バル
ブは、上記Ｊエカ苗と上記室との間における燃料通路を
制御するようにボデー内に軸方向に移動可に収納される
とともに、ボデーの筒状案内穴内に摺動自在に設りられ
て上記圧力室の方へ（＝ｌ勢するイ」勢手段の動作に従
うようにした筒状ステムと、ボデーの円錐状弁座ど協働
する端部ど、上記ステムと上記端部との間にある中間部
分とを備えた；ディーげルエンシンの燃オ′８１用イン
ジ■クク・ノス゛ルに関する。That is, the body includes a cylindrical guide hole, a pressure chamber into which the cylindrical guide hole opens, a supply passage opening into the pressure chamber and supplying fuel under pressure, etc., to the pressure chamber. A circular valve 6 having an opening diameter smaller than the diameter of the cylindrical guide hole, and a projecting end formed within the projecting end, with the conical valve seat having an opening. At least one fuel 11. formed in the chamber has a cylindrical portion. The needle valve is axially movably housed in the body so as to control the fuel passage between the J-eka seedling and the chamber; A cylindrical stem that is slidably installed in a cylindrical guide hole of the body and follows the movement of the force means toward the pressure chamber, and a conical valve seat of the body cooperate with each other. and an intermediate portion between the stem and the end.
上記タイプの従来のノズルにあっては、ニー１〜ル・バ
ルブの端部はノス゛ル・ボデーにおける円錐状ブ１゛座
とｌ／／触しく１１−カ室と他の室との間にｄ５ける燃
わ１通路を制η１１づるようになっているが、このニー
ドル・バルブの端部は頂部を有する円錐状の形態を有し
ている。このような従来ノズルは、ビス１〜ンヘツ１〜
に形成された燃焼案内に直接的に燃料を噴則り−るよう
にした燃料直接噴射型」ニンジンで・−１投的に用いら
れＣいる。In conventional nozzles of the type mentioned above, the ends of the needle valves are located between the conical valve seat in the nozzle body and the d5 contact between the 11- and other chambers. The end of the needle valve has a conical shape with a top. Conventional nozzles like this have screws 1 to 1.
A fuel direct injection type in which fuel is injected directly into a combustion guide formed in the combustion chamber is commonly used in carrots.
燃料間接噴射型エンジン、′？ｌなゎらシリンダヘラ１
−に形成されかつ燃焼至に連通りる予燃室に燃わ１をｌ
ＩＡ躬づる万代の１ンジンにあっては、軸型インジェク
タ（＋１ ｉ ｎ口ｅ肖］ｊｅｃｔｏｒ ） カー 般
ニ使用ｅれ、これによれば、燃焼圧力の増加率が低減す
るように４１−ンＣいる。Indirect fuel injection engine, ′? lnaware cylinder spatula 1
- The combustion chamber is formed in the pre-combustion chamber and communicates with the combustion chamber.
In the case of the 1st engine of IA Mizuru Bandai, a shaft type injector (+1 injector) is generally used in the car, and according to this, the 41-inch injector is used to reduce the rate of increase in combustion pressure. There is C.
しかしなから、上記軸型インジェクタにおいて（Ｊｌ、
ニーｊ〜ル・バルブの端部は、予燃室で生ずる燃焼にさ
らされているため、ノズルの寿命や作動安全性に対して
不利である。However, in the above shaft type injector (Jl,
The end of the needle valve is exposed to the combustion that occurs in the pre-combustion chamber, which is detrimental to the life and operational safety of the nozzle.
本発明の１」的は、予燃室を有する」ニンジンにも適用
され、上記軸型ノズルの上記欠点を解消しく、エンジン
のＪ：り円滑な運転を達成づるとと−ｂに燃料消費量を
少なくし、さらに排気ガス量を低減づる上記タイプのノ
ズルを提供することである。１上記目的を達成するため
の本発明の要旨どりるどころは、上記ニードル・バルブ
の端部に、円錐状弁座と協働する截頭円神都と、上記室
の筒部に１＋Ａ１動自在に嵌合する先端筒部とを備え、
該先端「５部の長さ人Ｊ法はニードル・バルブの移動ス
トａ −り司法より９．０く、ニードル・バルブの先９
１１ｉ：筒部ど室の筒部との間に形成されるクリアラン
スが、ニードル・バルブの上昇初期であってかつ先端筒
部か室の筒部から外れない段階で、燃料が至に向って圧
力下で引かれ得る寸法とし／〔ことを特徴とりる燃料用
インジェクタ・ノズルに存づる。The first object of the present invention is also applied to a "carrot" having a pre-combustion chamber, which eliminates the above-mentioned drawbacks of the shaft-type nozzle, achieves smooth operation of the engine, and reduces fuel consumption. It is an object of the present invention to provide a nozzle of the above type which reduces the amount of exhaust gas. 1. The gist of the present invention to achieve the above object is that the end of the needle valve has a truncated circular shape that cooperates with the conical valve seat, and the cylindrical part of the chamber has a 1+A1 movable part. and a tip tube part that fits into the
The length of the 5th part of the tip is 9.0 from the length of the needle valve movement, and the tip of the needle valve is 9.
11i: When the clearance formed between the cylindrical part and the cylindrical part of the chamber is at the initial stage of the rise of the needle valve and the tip cylindrical part does not come off from the cylindrical part of the chamber, the fuel is pressurized toward the end. A fuel injector nozzle is characterized in that the fuel injector nozzle is dimensioned so that it can be drawn under.
以下に、図示の実施例について本発明を具体的に３１明
する。The present invention will be specifically explained below with reference to the illustrated embodiments.
尚、本発明実施例の説明に先立ら、第１，２図に示した
従来例を便宜上び１明する。Before explaining the embodiments of the present invention, the conventional example shown in FIGS. 1 and 2 will be briefly explained for convenience.
第１図に示した従来の燃料噴射ノズルはボデー１を協え
（’ Ｊ、５す、該小−ノー−１は、圧力￥３に向っ（
開口する筒状案内穴２を有づる１、
（二ｈピボデー１には燃料供給通路４を形成し−Ｃいる
。この通路４（よ上記圧力室３に開口している。The conventional fuel injection nozzle shown in FIG.
The pivot body 1 has a cylindrical guide hole 2 that opens, and a fuel supply passage 4 is formed in the pivot body 1. This passage 4 opens into the pressure chamber 3.
十〔、ｉ月力至３の底部には円紳状弁座ｊ）を形成して
いる。この弁座５は、Ｊｌｌ記法状案内穴の直径ＸＪ法
より小さな聞１」直径寸法を有しでいる。A round valve seat is formed at the bottom of the valve seat. The valve seat 5 has a diameter of 1" smaller than the diameter of the guide hole in the Jll notation.
小デー１は細い突出端１ａを有し、該突出端１ｄ内には
、上記弁座５が聞１］りるところの筒部７を１ｇ１１え
１．：室６か形成されている。The small diameter 1 has a thin projecting end 1a, and within the projecting end 1d is a cylindrical portion 7 where the valve seat 5 is placed. :6 chambers are formed.
ボ】−−１の−１−記文出端１ａには、その白山端；に
Ｊ３い（、燃′Ａ′８１を゛卒６に供給するための少４
ｙりども１つの噴射孔８を形成している。BO】--1-1- At the writing end 1a, there is a J3 tank at the white mountain end;
Both of them form one injection hole 8.
図示の従来例では、３個の噴射孔８が形成されているか
、この＋＋ｒｓ川孔の用数およびその配置位置（：１、
ノズルが適用されるところのエンジンの特性に１心しく
ｉ８ ’、１イ変史変更る。In the illustrated conventional example, three injection holes 8 are formed, the number of these injection holes and their arrangement positions (:1,
The i8' and 1' are modified to suit the characteristics of the engine to which the nozzle is applied.
上記１１ｆ１川孔８の直径寸法は通常０．２〜０．３ボ
デー１のト記商状案内穴２内には、ニードル・バルブの
筒状ステム９を摺動自在に設置〕でいる。The diameter of the 11f1 hole 8 is usually 0.2 to 0.3. A cylindrical stem 9 of a needle valve is slidably installed in the commercial guide hole 2 of the body 1.
このステム９は１９部を有Ｊる円鍾形の端部１０を有し
ている。この端部１０はボデー１の円錐状弁座５と協働
してｈｌｌ苗室３ら室６に至る燃料通路を制１ｌｌ−！
Ｉるようになっている。This stem 9 has a circular end 10 having 19 parts. This end portion 10 cooperates with the conical valve seat 5 of the body 1 to control the fuel passage from the seedling chamber 3 to the chamber 6.
It is designed to be used.
上記ニードル・バルブはステム９ど端部１〈）の間に中
間部分を有している。この中間部分は截頭円錐部１１と
局部１２より構成される１、ノズルの作動１１４にｄ５
いては、通路４を通って矢印Ｆ２の方向に供給される燃
料の圧力が圧力室３内においてバルブの上記截頭円錐部
１１に作用して該バルブを押し上げ、ステム９に作用づ
−る弾性イ」勢手段の作用ＩＣ抗して蛮６と圧力蛮３と
を連通ずる。The needle valve has an intermediate portion between the stem 9 and the end 1<). This intermediate part consists of a truncated conical part 11 and a local part 12, d5 for the actuation 114 of the nozzle.
In this case, the pressure of the fuel supplied through the passage 4 in the direction of the arrow F2 acts on the frustoconical portion 11 of the valve in the pressure chamber 3 to push the valve upward, and the elastic force acting on the stem 9 2. Communication between the bar 6 and the pressure bar 3 is made against the action of the force IC.
ステム９と筒状案内穴２どの間のクリアランスは非常（
こ小さく（２μのオーダーである）、ス７ム９の外周面
と筒状案内穴２の内周面の間に燃料が引込まれることの
ないようになっている。The clearance between the stem 9 and the cylindrical guide hole 2 is very large (
This is small (on the order of 2μ) so that fuel will not be drawn between the outer peripheral surface of the spool 9 and the inner peripheral surface of the cylindrical guide hole 2.
第２図に示しＩＣ従来の燃料噴射ノズルにおい（は、第
１図に示したノズルの各部分に対応す゛る部分は１００
番台の同−符弓で示している。In the IC conventional fuel injection nozzle shown in FIG. 2, the parts corresponding to each part of the nozzle shown in FIG.
It is indicated by the same symbol on the number board.
第２図のノズルは次の点で第１図のノズルと異なつ−（
いる。ηなわら円紳状弁座１０５は、圧力室１０３から
１ｉ１１１れた１）°ｌ置にあるとともに、至１０６を
含む突出端１０１ａを備えｌζボテ−１０１の細捧部１
０抽の端部に形成しくいる。The nozzle in Figure 2 differs from the nozzle in Figure 1 in the following points:
There is. η, the rounded valve seat 105 is located at 1)°l located 1i111 from the pressure chamber 103, and has a protruding end 101a including 106.
It is formed at the end of 0 draw.
ボデー１０１の細棒部１０１ｂ内には、ニードル・バル
ブの筒部１１２か２ｍｍのＡ−グーのかなり人８いクリ
アランスを保って収納されている３、そして、この宿）
部１１２は截頭円錐部１１３と筒部１１４とを介して円
鍾端８１Ｎ１０に接続している。Inside the thin rod part 101b of the body 101, the cylindrical part 112 of the needle valve is housed with a considerable clearance of 2mm A-Goo (3, and this hotel).
The portion 112 is connected to the cylindrical end 81N10 via a truncated conical portion 113 and a cylindrical portion 114.
さく、第３図以下に本発明の実施例に係るノズルを示し
ているが、第３図に示したノズルは次の点Ｃ第′１図の
従来ノズルと異なっている。′１Ｊなわｌっ、ニードル
・バルブの端；部は、ボデー１の円鍾状弁１・（入５と
協働りる截頭円錐部１５と、至６の筒部７に摺動自在に
嵌合する先端筒部１６とを備えでいる。3 and below show nozzles according to embodiments of the present invention. The nozzle shown in FIG. 3 differs from the conventional nozzle shown in FIG. 1 in the following points. The end of the needle valve is slidably inserted into the truncated conical part 15 of the body 1 which cooperates with the inlet 5 and the cylindrical part 7 of the end 6. It is provided with a distal end tube portion 16 that fits.
第Ｌ）、６図に詳細に示すように、ニードル・バルブの
先端筒部１６の長さ司法Ａはニードル・バルブの移動ス
トローク寸法Ｂにり小さく構成し−（いる。As shown in detail in FIG. 6, the length A of the distal end barrel portion 16 of the needle valve is configured to be smaller than the travel stroke dimension B of the needle valve.
上記長さ寸法△および移動ストローク刈払Ｂの比率はエ
ンジンのタイプにより異なるが、実際上は０．６・〜０
，８の間で変化する。The ratio of the above length dimension △ and moving stroke brush cutting B varies depending on the engine type, but in reality it is 0.6-0.
, 8.
先端筒部１６と室６の筒部７との間にＪ３りるクリアラ
ンスは、ニードル・バルブの上昇初期、づなわら先端筒
部１６が室６の筒部７からまだ外れ（いない段階におい
て、加圧燃料か至６に向っ（引がれるような寸法構成と
している。The clearance J3 between the tip cylindrical portion 16 and the cylindrical portion 7 of the chamber 6 is determined during the initial stage of the needle valve's ascent, when the tip cylindrical portion 16 has not yet come off the cylindrical portion 7 of the chamber 6 (not yet added). The dimensions are such that the pressurized fuel is pulled towards the end.
実際上は、上記先端筒部１６の直径Ｎ法は全６の筒部７
の直径寸法より２０〜３０μ小さく ４！４成している
。In reality, the diameter N method of the tip tube portion 16 is the diameter of all six tube portions 7.
It has a diameter of 4!4 which is 20 to 30 microns smaller than the diameter of .
第４図に示した本発明の変形例（ま第２図の従来ノズル
と以下の点で異なっている。？Ｉなわら、ニードル・バ
ルブの端部は、円紳状弁座１０５ど協１動する截頭円錐
部１１５と、至１０らの筒部１０７に）習動自在に嵌合
する先端筒部１１６とを１１１１えている。A modified example of the present invention shown in FIG. 4 (which differs from the conventional nozzle shown in FIG. 2 in the following points). It has a movable truncated conical portion 115 and a distal end tube portion 116 that is movably fitted into the tube portions 107 (to 10).
先端筒部１１Ｇと、至１０６の筒部１０７に関りるりリ
アシンスとの比率は、第３．５．６について説明したこ
とど同様である。The ratio between the tip tube portion 11G and the rear width of the tube portion 107 to 106 is the same as that described in Section 3.5.6.
本弁明に係る２つの上記実施例に＋５いては、筒部１６
，１１６が存在りることにより、燃お１が、ニードル・
パル／の聞弁初明において、部材１６と７問および１１
６と１０７間に形成される環状ギャップを通して引かれ
、従って燃料間接噴射式にしろ燃料間接噴射式にしろ、
ディーゼルエンジンに特有の運転の荒さが緩和されるこ
とになり、従って運転騒音か小さくなるとともに燃料消
費も少なくなり、かつ排気カス最も少なくなる。+5 in the two above-mentioned embodiments according to the present defense, the cylindrical portion 16
, 116, combustion 1 becomes needle ・
Part 16 and 7 questions and 11 in Pal/'s Monben Shomei
drawn through the annular gap formed between 6 and 107, so whether indirect fuel injection or indirect fuel injection,
The harshness of operation characteristic of diesel engines is alleviated, resulting in lower operating noise, lower fuel consumption, and the lowest exhaust emissions.
第７．８図に第３．５．６に対−する変形例を示してい
る。、′ｆＳ７，８図においては、ニードル・バルー／
’ ｉ；Ｌ （戊り（１円紳部１５ど先端筒部１６との
間に中間部を協えている。この中間部は湾曲形状をした
部分１７と、閉弁状態においで局部７内に延イ１−リ−
る先端筒部ｉ［３ａどで構成される。Fig. 7.8 shows a modification to Fig. 3.5.6. ,'fS7 and 8, the needle balloon/
'i;L Nobui 1-Lee
It is composed of a tip cylinder part i[3a, etc.
４１９図に示した変形例ひは、ニー１〜ル・バルブの端
Ｒ（（＋こは先端筒部１６（こ延長部が形成されており
、この延長部は、小さな直径刈払を右する筒部１８の６
の容積を減少させるようになっている。The modified example shown in Fig. 419 is formed with an extension at the end of the knee 1 to end R of the valve. 6 of cylinder part 18
It is designed to reduce the volume of
第１０図に示した変形例に＋３い（−は、ニードル・バ
ルブは先端筒部１６に延長部を有して＋３す、この延長
部は凸部１９の形状をなしていて、バルブが閉弁位置に
あるとき、至６の容積を部分的に占有するようになって
いる。さらに、第１１図では、先端筒部１６の延長部は
半球状部２０で形成され、該半球状部２０は、バルブが
閉弁位置にあるとさ、室を完全に占有して排気ガス量を
低減づるＪ、うになっている。The modification shown in FIG. 10 is different from the one shown in FIG. When in the valve position, it partially occupies the volume of the tip tube 16. Additionally, in FIG. When the valve is in the closed position, it completely occupies the chamber and reduces the amount of exhaust gas.
第１，２図は夫々従来例に係るディーゼルエンジンの燃
お１噴躬用インジエクタ・ノズルを承り縦断面図、第３
，４図は本発明の各実施例に係るインジェクタ・ノズル
を示す第１，２図と同様の…１面図、第５図は第３図に
おけるインジエクタ・ノズルを拡大して示す詳細断面図
、第６図はニードル・バルブが全開状態である状態を示
Ｊ第５図と同様の断面図、第７図は本発明の変形例を示
す第す図と同様の力ｉ面図、第８図は第７図に示した変
形例（： ｄすっＣ第６図と同様の断面図、第９．１０
゜１１図は人々本発明の他の変形例を示す第５図と同様
の断面図である。
１．１０４−＝ボデー、ｉａ、１ｏｉａ ・・・突出端
、１０１ ｂ ・・・細棒部、２・・・１ｉＳｌ状案内
穴、３，１０３・・・圧力案、４，１０４・・・燃わ１
供給通路、５ｊ０５・・・円紳状弁座。６，１０６・・
・？ｒｆｚ ７． ＋０７・・・ｉ：ｓＩ １ｊｌ
ｉ 、 ８．１０８・・・噴射孔、９．Ｈ２Ｏ・・・
１１勺状スｒム、１０． ４１０・・・端部、＋４．
Ｉｉ４・・・截頭円踵部、１２，１１２・・・１；Ｓ）
部、１！＋、Ｎ５中円鍾８１（，１６，１１６・・・先
端筒部、１７・・・部分、１８・・・筒部、１９・・・
凸部、２０・・・半球状δ１１．１１３・・・円綽部、
１１４・・・筒部、に２．ＦＩ・・・矢印、△・・・
長さ寸法、Ｂ・・・移動スｌ−ロークｑ法。Figures 1 and 2 are longitudinal cross-sectional views of a conventional diesel engine injector nozzle for fuel injection, respectively;
, 4 is a front view similar to FIGS. 1 and 2 showing an injector nozzle according to each embodiment of the present invention, and FIG. 5 is a detailed sectional view showing an enlarged view of the injector nozzle in FIG. 3. Fig. 6 is a sectional view similar to Fig. 5 showing the needle valve in a fully open state, Fig. 7 is a force i-plane view similar to Fig. 1 showing a modification of the present invention, and Fig. 8 is a modified example shown in Fig. 7 (: dssC sectional view similar to Fig. 6, Fig. 9.10
11 is a sectional view similar to FIG. 5 showing another modification of the present invention. 1.104-=Body, ia, 1oia... Projecting end, 101 b... Thin rod part, 2... 1i Sl-shaped guide hole, 3,103... Pressure plan, 4,104... Fuel 1
Supply passage, 5j05... round gentleman valve seat. 6,106...
・? rfz7. +07...i:sI 1jl
i, 8.108... injection hole, 9. H2O...
11. Slim, 10. 410... end, +4.
Ii4...truncated heel, 12,112...1;S)
Part 1! +, N5 middle circular peg 81 (, 16, 116...Tip cylinder part, 17...Part, 18...Cylinder part, 19...
Convex part, 20... Hemispherical δ11.113... Circular part,
114...cylindrical part, 2. FI...Arrow, △...
Length dimension, B...Movement stroke q method.
Claims (1)
いる圧力室と、該圧力室に開口して燃料を圧力ｌ・に供
給Ｊるための供給通路と、上記圧力室に連通ずるととも
に上記筒状案内穴の直径より小さな聞ｌ」直径を備えた
円錐状弁座ど、細い突出端と、該突出端内に形成される
とともに、上記円紳状弁座が聞（」シている筒部を有り
−る釡ど、該案内に形成された少なくとも１つの燃料噴
射孔とを備え、 上記ニードル・バルブは、上記圧力室と上記室との間に
おける燃料通路を制御するＪ：うにボデー内に軸）〕向
に移動可に収納されるとどもに、ボデーの筒状案内穴内
に摺動自在に設（プられて上記圧力室の方ヘイ；］勢す
る付勢手段の動作に従うようにした筒状ステムと、ボデ
ーの円錐状弁座と協働づる端部と、上記ステムと上記端
部との間にある中間部分とを備えた、 ディーげルエンジンの燃料用インジェクタ・ノズルにお
いて、 上記ニードル・バルブの端部は、円鍾状ブを座（５，１
０５）と協働する截頭円錐部（１５，１１５）と、上記
室（６，１０６）の筒部（７，１０７＞に嵌合する先端
筒部（１６，１１６＞とを備え、該先端筒部（１６，１
１６）の長さ寸法（Ａ）はニードル・バルブの移動ス１
〜ローク寸法（Ｂ）より短く、ニードル・バルブの先端
筒部＜ ｉ６，１１ｅ）と室（６，１０６）の筒部（７
゜１０７）との間に形成されるクリアランスが、ニード
ル・バルブの上昇初期であってかつ先端筒部（１６，１
１６）が室（’ｅ：１ｏｅ ）の筒部（７，１０７）か
ら外れない段階で、燃料が室（’６，１０６ ＞に向っ
て圧力下で引かれＩＮる寸法であることを特徴とづる燃
料用インジェクタ・ノズル。 （２）上記先端筒部（１６，１１６＞の直径は仝（６゜
１０Ｇ）の局部（７，１０７）の直径より２０〜３０μ
小ざいことを特徴どりる第１項に記載のノズル。 ＜３） −−１〜ル・バルブの先端筒部（１６，１１６
＞の長ざ勺法（Ａ）はその直径寸法の約半分であること
を特徴どする第１項に記載のノズル。 （４）ニードル・バルブの端部の截頭円踵部（１５゜１
１５）は先端筒部（１６，１１６）に直接連接されたこ
とを特徴とする９ＪＳ １項に記載のノズル。 （５）ニードル・バルブの端部の截頭円神都（１５゜１
４！＋）と先端間部（１６，１１６）との間に中間部分
（＋７．Ｈｉａ）を形成したことを特徴とり−る第１項
に記載のノズル。 （０）先端ｆ；） ？Ｅｌｉ （１（ｉ、 １１６ ）
の長さスＪ法（Ａ）ど−一トル・バルブの移動ストロー
ク寸法（Ｂ）との比率は０．６〜０．７５であることを
狛徴と覆る第１項に記載のノズル。 く７）ニー１〜ル・バルブは先端筒部（１６）の延長部
分どして構成された先端筒部（，１８： １９ ； ２
０＞を有しく、バルブが閉弁位置にあるとき、室（６）
の容積か小さくなるようにしたことをｆｉ徴とする[Scope of Claims] (1) A nozzle body and a needle valve, the body having a cylindrical guide hole, a pressure chamber into which the cylindrical guide hole opens, and an opening into the pressure chamber. a slender protruding end, such as a conical valve seat communicating with the pressure chamber and having a diameter smaller than the diameter of the cylindrical guide hole; a flange having a cylindrical portion formed within the protruding end and into which the rounded valve seat is inserted; and at least one fuel injection hole formed in the guide;・The valve controls the fuel passage between the pressure chamber and the chamber. The valve is housed in the body so as to be movable in the axial direction, and is slidable in the cylindrical guide hole of the body. a cylindrical stem adapted to follow the action of a biasing means for biasing the pressure chamber; an end cooperating with a conical valve seat of the body; and the stem and the end. In a diesel engine fuel injector nozzle having an intermediate portion between
a truncated conical part (15, 115) that cooperates with the chamber (6, 106); Cylindrical part (16,1
16) Length dimension (A) is needle valve travel step 1
~ Shorter than the rotor dimension (B), the tip cylinder part of the needle valve < i6, 11e) and the cylinder part (7, 106) of the chamber (6, 106)
The clearance formed between the needle valve and the tip cylinder part (16, 107) is at the beginning of the upward movement of the needle valve.
16) is characterized in that the size is such that the fuel is drawn under pressure toward the chamber ('6,106) at a stage where the fuel does not come off from the cylindrical part (7,107) of the chamber ('e:1oe). Injector nozzle for fuel. (2) The diameter of the tip cylinder part (16, 116) is 20 to 30 μm larger than the diameter of the local part (7, 107) of (6° 10G).
The nozzle according to item 1, characterized by being small. <3) --1~ Le valve tip cylinder part (16,116
2. A nozzle according to claim 1, characterized in that the elongated length (A) of > is approximately half of its diameter dimension. (4) The truncated heel at the end of the needle valve (15°1
15) The nozzle according to item 1 of 9JS, characterized in that the nozzle is directly connected to the tip tube portion (16, 116). (5) The truncated circle at the end of the needle valve (15°1
4! 2. The nozzle according to item 1, characterized in that an intermediate portion (+7.Hia) is formed between the tip portion (+7.Hia) and the tip portion (16, 116). (0) Tip f;) ? Eli (1(i, 116)
2. The nozzle according to item 1, wherein the ratio of the length of the length (A) to the travel stroke dimension (B) of the one-torque valve is 0.6 to 0.75. 7) Knee 1 to Le valve is a tip cylinder part (18: 19; 2
0> and when the valve is in the closed position, the chamber (6)
The fi sign is that the volume of
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT67392A/83 | 1983-04-11 | ||
| IT67392/83A IT1167325B (en) | 1983-04-11 | 1983-04-11 | PULVERIZER FOR DIESEL ENGINE FUEL INJECTORS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59206673A true JPS59206673A (en) | 1984-11-22 |
Family
ID=11302008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59071694A Pending JPS59206673A (en) | 1983-04-11 | 1984-04-09 | Injector-nozzle for fuel of diesel engine |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS59206673A (en) |
| AR (1) | AR231862A1 (en) |
| BR (1) | BR8401757A (en) |
| CH (1) | CH657423A5 (en) |
| DE (1) | DE3412516A1 (en) |
| ES (1) | ES8503408A1 (en) |
| FR (1) | FR2544022A1 (en) |
| GB (1) | GB2138073B (en) |
| IT (1) | IT1167325B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294655A (en) * | 1990-04-11 | 1991-12-25 | Nippondenso Co Ltd | Fuel injection nozzle |
| JP2011052564A (en) * | 2009-08-31 | 2011-03-17 | Toyota Motor Corp | Fuel injection valve |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3510076A1 (en) * | 1985-03-20 | 1986-10-16 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Air-compressing internal combustion engine |
| EP0283154A1 (en) * | 1987-03-14 | 1988-09-21 | LUCAS INDUSTRIES public limited company | Fuel injection nozzle |
| DE3734587A1 (en) * | 1987-10-13 | 1989-05-03 | Bosch Gmbh Robert | Fuel injection nozzle for internal combustion engines |
| US5033679A (en) * | 1987-10-30 | 1991-07-23 | Golev Vladislav I | Injector nozzle for a diesel engine |
| DE10306700A1 (en) * | 2003-02-18 | 2004-08-26 | Robert Bosch Gmbh | Fuel injection valve for IC engine has a cylindrical section of the dosing needle and the injector bore to maintain an even aperture over part of the needle displacement |
| DE102013212142A1 (en) * | 2013-06-25 | 2015-01-08 | Robert Bosch Gmbh | Nozzle assembly for a fuel injector and fuel injector |
| GB2549350B (en) | 2016-09-12 | 2018-04-18 | Amaroq Ltd | Two-stroke compression ignition internal combustion engines |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE663301C (en) * | 1933-03-14 | 1938-08-04 | Bosch Gmbh Robert | Injection nozzle for internal combustion engines with self-ignition |
| FR791105A (en) * | 1934-07-04 | 1935-12-04 | Siemens Ag | Injection device for diesel engines with pre-injection and main injection |
| DE671686C (en) * | 1936-11-08 | 1939-02-11 | Humboldt Deutzmotoren Akt Ges | Spigot nozzle for internal combustion engines |
| GB664884A (en) * | 1948-10-21 | 1952-01-16 | Volvo Ab | Improvements in fuel injection devices for internal combustion engines |
| GB738769A (en) * | 1951-12-20 | 1955-10-19 | Emmerich Satzger | Improvements in and relating to fuel injection nozzles for injection internal combustion engines |
| CH307428A (en) * | 1951-12-20 | 1955-05-31 | Friedmann & Maier Ag | Injection nozzle for internal combustion engines. |
| US3559892A (en) * | 1968-06-18 | 1971-02-02 | Ambac Ind | Fuel injection nozzle with auxiliary spray orifice |
| FR2050592A5 (en) * | 1969-06-18 | 1971-04-02 | Ffsa | |
| JPS5037921A (en) * | 1973-07-17 | 1975-04-09 | ||
| DE2920100A1 (en) * | 1979-05-18 | 1980-11-27 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE WITH CONTROLLED INJECTION CROSS SECTION FOR INTERNAL COMBUSTION ENGINES |
-
1983
- 1983-04-11 IT IT67392/83A patent/IT1167325B/en active
-
1984
- 1984-03-22 GB GB08407485A patent/GB2138073B/en not_active Expired
- 1984-04-03 CH CH1680/84A patent/CH657423A5/en not_active IP Right Cessation
- 1984-04-04 DE DE3412516A patent/DE3412516A1/en not_active Withdrawn
- 1984-04-09 JP JP59071694A patent/JPS59206673A/en active Pending
- 1984-04-10 FR FR8405670A patent/FR2544022A1/en not_active Withdrawn
- 1984-04-10 BR BR8401757A patent/BR8401757A/en unknown
- 1984-04-10 ES ES531468A patent/ES8503408A1/en not_active Expired
- 1984-04-11 AR AR296265A patent/AR231862A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294655A (en) * | 1990-04-11 | 1991-12-25 | Nippondenso Co Ltd | Fuel injection nozzle |
| JP2011052564A (en) * | 2009-08-31 | 2011-03-17 | Toyota Motor Corp | Fuel injection valve |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2138073A (en) | 1984-10-17 |
| GB8407485D0 (en) | 1984-05-02 |
| ES531468A0 (en) | 1985-03-01 |
| GB2138073B (en) | 1986-09-10 |
| ES8503408A1 (en) | 1985-03-01 |
| CH657423A5 (en) | 1986-08-29 |
| AR231862A1 (en) | 1985-03-29 |
| FR2544022A1 (en) | 1984-10-12 |
| IT1167325B (en) | 1987-05-13 |
| DE3412516A1 (en) | 1984-10-31 |
| IT8367392A0 (en) | 1983-04-11 |
| BR8401757A (en) | 1984-11-20 |
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