JPH0163772U - - Google Patents

Info

Publication number
JPH0163772U
JPH0163772U JP1988132894U JP13289488U JPH0163772U JP H0163772 U JPH0163772 U JP H0163772U JP 1988132894 U JP1988132894 U JP 1988132894U JP 13289488 U JP13289488 U JP 13289488U JP H0163772 U JPH0163772 U JP H0163772U
Authority
JP
Japan
Prior art keywords
needle valve
nozzle body
injection nozzle
valve
control passage
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
Application number
JP1988132894U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of JPH0163772U publication Critical patent/JPH0163772U/ja
Pending legal-status Critical Current

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
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は左半分に本考案の４つの実施例を示し、
右半分に従来公知の構成を示すもので、第１図は
第１実施例の燃焼室側先端部の拡大断面図、第２
図及び第３図はそれぞれ第２及び第３実施例の燃
焼室側先端部の拡大断面図、第４図は第４実施例
の部分破断縦断面図、第５図は第４図の部分拡大
図である。 １０……ノズル体、１２……弁座、１４，１４
ａ，１４ｄ……ニードル弁、１６……弁座面、１
６ｃ……ニードル弁先端部、１８……中間面、１
８ａ……円錐面、２０……環状ギヤツプ、２２…
…外周面、２４，２４ｄ……軸部、２６，２６ａ
……環状縁部、２８……先端部、３０……袋孔、
３２……噴射口、３４，３４ａ，３４ｃ，３４ｄ
……制御通路、３６……リング体、３７……孔部
分、３８……端面、４０……旋削部、４２……つ
ば、４４……流入縁部、４６……壁部、５０……
圧力室、５２……燃料供給導管、５４，５６……
環状縁部、５８……環状面、６０……軸部、ｂ…
…幅、ｈ……オーバラツプ量、ｄ１……軸部の直
径、ｄ２……底円の直径。 The left half of the drawing shows four embodiments of the invention,
The right half shows a conventionally known configuration, and FIG. 1 is an enlarged cross-sectional view of the combustion chamber side tip of the first embodiment, and FIG.
Figures 3 and 3 are enlarged cross-sectional views of the combustion chamber side tips of the second and third embodiments, respectively, Figure 4 is a partially broken vertical cross-sectional view of the fourth embodiment, and Figure 5 is a partially enlarged view of Figure 4. It is a diagram. 10... Nozzle body, 12... Valve seat, 14, 14
a, 14d... Needle valve, 16... Valve seat surface, 1
6c... Needle valve tip, 18... Intermediate surface, 1
8a... Conical surface, 20... Annular gap, 22...
...Outer peripheral surface, 24, 24d...Shaft portion, 26, 26a
... annular edge, 28 ... tip, 30 ... blind hole,
32... Injection port, 34, 34a, 34c, 34d
. . . Control passage, 36 .
Pressure chamber, 52... Fuel supply conduit, 54, 56...
Annular edge, 58... Annular surface, 60... Shaft, b...
... Width, h ... Overlap amount, d 1 ... Diameter of shaft portion, d 2 ... Diameter of base circle.

Claims (1)

【実用新案登録請求の範囲】 １ 内燃機関の燃料噴射ノズルであつて、ノズル
体を有し、このノズル体に弁座と、弁座に接続さ
れた袋孔と、袋孔を起点として延びる少なくとも
１つの噴射口とが設けられており、さらにノズル
体内に移動可能に支承されたニードル弁が設けら
れており、ニードル弁が閉鎖ばねによつて負荷さ
れており且つノズル体内で燃料によつて充填され
た圧力室の領域内に圧力肩を形成しており、この
圧力肩に燃料圧力がニードル弁の開放方向で作用
しており、さらに、ニードル弁の閉鎖行程時に、
弁座領域内の燃料圧力を内燃機関の燃焼圧力より
高い値に保持する手段を有している形式のものに
おいて、ニードル弁１４によつて行程に関連して
影響される、噴射燃料のための制御通路３４が弁
通路１２，１６と直列に設けられており、制御通
路３４の流れ横断面が、ニードル弁１４の閉鎖行
程時に袋孔３０内の燃料圧力をポンプ側の負荷軽
減軸から切り離す程度の絞り横断面まで減少させ
られることを特徴とする、内燃機関の燃料噴射ノ
ズル。 ２ 制御通路３４が、弁通路１２，１６の上流で
ニードル弁１４の軸部２４と、これを取囲む、ノ
ズル体１０の段孔状の孔部分３７との間に形成さ
れており、さらに、ニードル弁１４がノズル体１
０の段孔状の孔部分３７とオーバラツプする範囲
内で軸部２４から円錐状の中間面１８への移行個
所に環状縁部２６を有していることを特徴とする
、実用新案登録請求項１記載の噴射ノズル。 ３ ニードル弁１４ａの環状縁部２６ａに続く円
錐状の部分１８ａの底円直径ｄ２が軸部２４ａの
直径ｄ１より小さいことを特徴とする、実用新案
登録請求項２記載の噴射ノズル。 ４ ノズル体１０の、制御通路３４を取り囲んで
いる段孔状の孔部分３７が、ノズル体１０にはめ
込まれたリング体３６の所に形成されていること
を特徴とする、実用新案登録請求項２又は３記載
の噴射ノズル。 ５ 制御通路３４ｃが、弁通路１２，１６ｃの下
流でニードル弁先端部１６ｃに設けられたつば４
２と、袋孔３０の流入縁部４４に続いて延びる、
ノズル体の壁部分４６との間に形成されているこ
とを特徴とする、実用新案登録請求項１記載の噴
射ノズル。 ６ 制御通路３４ｄが、弁通路１２，１６の上流
でニードル弁１４ｄの軸部２４ｄ，６０に設けた
段状縁部５４と、弁座１２へ通じた孔３７への圧
力室５０の移行部に形成された、ノズル体１０の
環状縁部５６との間に形成されていることを特徴
とする、実用新案登録請求項１記載の噴射ノズル
。 ７ ニードル弁１４ｄの軸部２４ｄ，６０に設け
られた段状縁部５４が、圧力肩５８をも形成して
いることを特徴とする、実用新案登録請求項６記
載の噴射ノズル。[Claims for Utility Model Registration] 1. A fuel injection nozzle for an internal combustion engine, which has a nozzle body, a valve seat in the nozzle body, a blind hole connected to the valve seat, and at least one part extending from the blind hole as a starting point. and a needle valve movably mounted within the nozzle body, the needle valve being loaded by a closing spring and being filled with fuel within the nozzle body. A pressure shoulder is formed in the region of the pressure chamber, on which the fuel pressure acts in the opening direction of the needle valve, and furthermore, during the closing stroke of the needle valve,
For the injected fuel, which is influenced in a stroke-related manner by the needle valve 14, in those types with means for maintaining the fuel pressure in the valve seat area at a value higher than the combustion pressure of the internal combustion engine. A control passage 34 is provided in series with the valve passages 12, 16, and the flow cross-section of the control passage 34 is such that, during the closing stroke of the needle valve 14, the fuel pressure in the blind hole 30 is separated from the load relief shaft on the pump side. Fuel injection nozzle for an internal combustion engine, characterized in that the orifice cross section is reduced to . 2. A control passage 34 is formed upstream of the valve passages 12 and 16 between the shaft portion 24 of the needle valve 14 and a stepped hole portion 37 of the nozzle body 10 surrounding it, and further, The needle valve 14 is the nozzle body 1
The utility model registered claim is characterized in that it has an annular edge 26 at the transition point from the shank 24 to the conical intermediate surface 18 within a range overlapping with the step hole-like hole portion 37 of 0. 1. The injection nozzle according to 1. 3. The injection nozzle according to claim 2, wherein the diameter d2 of the bottom circle of the conical portion 18a following the annular edge 26a of the needle valve 14a is smaller than the diameter d1 of the shaft portion 24a. 4. A registered utility model claim characterized in that the stepped hole portion 37 of the nozzle body 10 surrounding the control passage 34 is formed at a ring body 36 fitted into the nozzle body 10. 3. The injection nozzle according to 2 or 3. 5 The control passage 34c is connected to the collar 4 provided at the needle valve tip 16c downstream of the valve passages 12, 16c.
2 and extending following the inlet edge 44 of the blind hole 30;
The injection nozzle according to claim 1, characterized in that the injection nozzle is formed between the nozzle body and the wall portion 46 of the nozzle body. 6. The control passage 34d is connected upstream of the valve passages 12, 16 to a stepped edge 54 on the shaft 24d, 60 of the needle valve 14d and at the transition of the pressure chamber 50 to the hole 37 leading to the valve seat 12. The injection nozzle according to claim 1, characterized in that the injection nozzle is formed between the annular edge 56 of the nozzle body 10 and the annular edge 56 of the nozzle body 10 formed therein. 7. The injection nozzle according to claim 6, characterized in that the stepped edge 54 provided on the shaft portions 24d, 60 of the needle valve 14d also forms a pressure shoulder 58.
JP1988132894U 1987-10-13 1988-10-13 Pending JPH0163772U (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873734587 DE3734587A1 (en) 1987-10-13 1987-10-13 Fuel injection nozzle for internal combustion engines

Publications (1)

Publication Number Publication Date
JPH0163772U true JPH0163772U (en) 1989-04-24

Family

ID=6338219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988132894U Pending JPH0163772U (en) 1987-10-13 1988-10-13

Country Status (2)

Country Link
JP (1) JPH0163772U (en)
DE (1) DE3734587A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033679A (en) * 1987-10-30 1991-07-23 Golev Vladislav I Injector nozzle for a diesel engine
GB9008403D0 (en) * 1990-04-12 1990-06-13 Lucas Ind Plc Fuel injection nozzle
DE19755057A1 (en) 1997-12-11 1999-06-17 Bosch Gmbh Robert Fuel injection nozzle for self-igniting internal combustion engines
JP2000087826A (en) * 1998-09-14 2000-03-28 Toyota Motor Corp Fuel injection valve and its manufacture
US6663027B2 (en) * 2000-12-11 2003-12-16 Kimberly-Clark Worldwide, Inc. Unitized injector modified for ultrasonically stimulated operation
DE10061571B4 (en) * 2000-12-11 2007-03-22 Robert Bosch Gmbh Fuel injector
DE10103051B4 (en) * 2001-01-24 2006-07-27 Robert Bosch Gmbh Fuel injector
DE102004025729A1 (en) * 2004-05-26 2005-12-15 Robert Bosch Gmbh Fuel injection valve for an internal combustion engine
DE102005030868A1 (en) * 2005-07-01 2007-01-11 Robert Bosch Gmbh Fuel injection valves in power engines
DE102009028089A1 (en) * 2009-07-29 2011-02-10 Robert Bosch Gmbh Fuel injection valve with increased small quantity capability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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
IT1167325B (en) * 1983-04-11 1987-05-13 Roberto Bosio PULVERIZER FOR DIESEL ENGINE FUEL INJECTORS

Also Published As

Publication number Publication date
DE3734587A1 (en) 1989-05-03

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