JP2002527678A - Fuel injection nozzles for self-igniting internal combustion engines - Google Patents

Fuel injection nozzles for self-igniting internal combustion engines

Info

Publication number
JP2002527678A
JP2002527678A JP2000577405A JP2000577405A JP2002527678A JP 2002527678 A JP2002527678 A JP 2002527678A JP 2000577405 A JP2000577405 A JP 2000577405A JP 2000577405 A JP2000577405 A JP 2000577405A JP 2002527678 A JP2002527678 A JP 2002527678A
Authority
JP
Japan
Prior art keywords
fuel injection
internal combustion
injection
valve seat
fuel
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
JP2000577405A
Other languages
Japanese (ja)
Inventor
ホッケンベルガー アクセル
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JP2002527678A publication Critical patent/JP2002527678A/en
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
    • F02M61/1806—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
    • F02M61/16—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
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent

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

(57)【要約】 自己点火式の内燃機関のための燃料噴射ノズルであって、ノズル本体に設けられた孔の、噴射側の端部に、円錐状の弁座面が形成されており、該弁座面を起点にして噴射孔が延びており、閉鎖力に抗して燃料流れ方向とは逆方向に開く弁ニードルが設けられており、該弁ニードルが、前記孔の、噴射側の端部とは反対の側の入口領域に移動可能に案内されており、弁ニードルの、弁座面に面した側が閉鎖円錐体を有しており、該閉鎖円錐体が弁座面と協働するようになっている形式のものにおいて、噴射孔横断面が、内燃機関の燃焼室に向かって、最初は細まり、その後に再び拡がっていることを特徴としている。 (57) [Summary] A fuel injection nozzle for a self-ignition type internal combustion engine, wherein a conical valve seat surface is formed at an injection-side end of a hole provided in the nozzle body, An injection hole extends from the valve seat surface, and a valve needle that opens in a direction opposite to the fuel flow direction against a closing force is provided, and the valve needle is provided on the injection side of the hole. The valve needle is movably guided into the inlet area on the side opposite the end, the side of the valve needle facing the valve seat having a closing cone which cooperates with the valve seat. In one embodiment, the cross-section of the injection hole narrows at first and then expands again toward the combustion chamber of the internal combustion engine.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】 背景技術 本発明は、請求項１の上位概念部に記載の形式の、自己点火式の内燃機関のた
めの燃料噴射ノズルに関する。BACKGROUND OF THE INVENTION The invention relates to a fuel injection nozzle for a self-igniting internal combustion engine, of the type defined in the preamble of claim 1.

【０００２】 このような形式の燃料噴射ノズルは、たとえばドイツ連邦共和国特許第４３０
３８１３号明細書ならびに書籍刊行物「ボッシュ・クラフトファールテヒニッシ
ェス・タッシェンブーフ（Ｂｏｓｃｈ ｋｒａｆｔｆａｈｒｔｅｃｈｎｕｓｃｈ
ｅｓ Ｔａｓｃｈｅｎｂｕｃｈ）」第２２版、１９５５年、第５２６頁以降の記
載に基づき公知である。A fuel injection nozzle of this type is described, for example, in DE 430
No. 3813 and the book publication "Bosch Kraftfahrtechnusch."
es Taschenbuch), 22nd edition, 1955, p. 526 et seq.

【０００３】 このような形式の燃料噴射ノズルの場合には、噴射孔が円筒状に形成されてい
る。この場合、噴射される燃料噴流の速度への燃料圧の変換は小さな範囲内で行
われ、これにより、高い効率損失が生じる。In the case of such a fuel injection nozzle, the injection hole is formed in a cylindrical shape. In this case, the conversion of the fuel pressure to the velocity of the injected fuel jet takes place within a small range, which results in high efficiency losses.

【０００４】 本発明の課題は、冒頭で述べた形式の燃料噴射ノズルを改良して、燃料圧が、
噴射される燃料噴流の速度へ変換される際の効率、ひいてはエンジン内での燃料
の分配効率が高められような燃料噴射ノズルを提供することである。また、燃料
噴射ノズルにより、ＮＯXおよびパティキュレート値が低減されることも望まし
い。The object of the present invention is to improve a fuel injection nozzle of the type described at the outset, so that the fuel pressure is reduced
It is an object of the present invention to provide a fuel injection nozzle capable of increasing the efficiency of conversion of the injected fuel jet into the velocity of the fuel jet, and thus the distribution efficiency of fuel in the engine. Further, the fuel injection nozzle, it is also desirable to NO X and particulate value is reduced.

【０００５】 発明の利点 この課題は、請求項１の特徴部に記載の特徴を備えた、自己点火式の内燃機関
のための燃料噴射ノズルにおいて解決される。[0005] The object is achieved in a fuel injection nozzle for a self-igniting internal combustion engine with the features of the characterizing part of claim 1.

【０００６】 噴射孔横断面が、内燃機関の燃焼室に向かって、最初は細まり、その後に再び
拡がっていることにより、燃料噴流速度への燃料圧の最適な変換が特に簡単に得
られ、ひいては内燃機関における燃料分配時の高い効率が得られる。つまり、燃
料噴射ノズルの細まったスロート領域では、より高い速度が生ぜしめられるのに
対して、燃料噴射ノズルの拡がったディフューザ部分では小さな粒子を有するス
プレの形成が可能となる。これにより、公知先行技術に基づき公知の燃料噴射ノ
ズルの場合に生じる、燃料噴流の比較的高い速度に基づき最大分配領域がノズル
から離れる方向へずらされるという不都合が、燃料噴射ノズルの拡がったディフ
ューザ部分によって阻止されるので有利である。したがって、燃料噴流速度への
燃料噴流圧の最適な変換により、キャビテーション傾向も減じられる。この場合
、最小の噴射孔横断面が噴射孔開口の、軸方向で真ん中の領域に延びていると有
利である。これにより、横断面が拡がった噴射孔領域と、横断面の減少した噴射
孔領域とが、ほぼ等しい軸方向長さを有している。The optimum conversion of the fuel pressure into the fuel jet velocity is particularly easily obtained, since the injection port cross section initially narrows and then expands again towards the combustion chamber of the internal combustion engine, As a result, high efficiency in fuel distribution in the internal combustion engine can be obtained. In other words, in the narrow throat region of the fuel injection nozzle, a higher speed is generated, whereas in the diffuser portion where the fuel injection nozzle is expanded, a spray having small particles can be formed. This has the disadvantage that in the case of the known fuel injection nozzle according to the prior art, the disadvantage that the maximum distribution area is shifted away from the nozzle due to the relatively high velocity of the fuel jet is due to the enlarged diffuser portion of the fuel injection nozzle. Is advantageously prevented. Thus, optimizing the conversion of fuel jet pressure to fuel jet velocity also reduces cavitation tendencies. In this case, it is advantageous if the smallest orifice cross section extends in the axially central region of the orifice opening. Thus, the injection hole region having a widened cross section and the injection hole region having a reduced cross section have substantially the same axial length.

【０００７】 さらに、このような燃料噴射ノズルは、たとえば放電加工によって特に廉価に
製造することができる。Further, such a fuel injection nozzle can be manufactured at a particularly low cost by, for example, electric discharge machining.

【０００８】 噴射孔の形成に関しては、種々様々の構成が考えられる。噴射孔が、以下の横
断面形状のうちの１つ、つまり、円形、楕円形、スリット形のうちの１つを有し
ていると有利である。Regarding the formation of the injection hole, various configurations are conceivable. Advantageously, the injection hole has one of the following cross-sectional shapes: circular, elliptical, slit-shaped.

【０００９】 本発明の対象の別の利点および有利な構成は、図面、実施例の説明および特許
請求の範囲から知ることができる。Further advantages and advantageous configurations of the subject of the invention can be gleaned from the drawings, the description of the embodiments and the claims.

【００１０】 実施例の説明 以下に、本発明の実施例を図面につき詳しく説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

【００１１】 ノズル本体１０は孔１２を有しており、この孔１２の底部は、噴射側の端部に
設けられた丸形隆起部１３内で円錐状の弁座面１４として形成されている。The nozzle body 10 has a hole 12, and the bottom of the hole 12 is formed as a conical valve seat surface 14 in a round protrusion 13 provided at the end on the injection side. .

【００１２】 この弁座面１４を起点にして丸形隆起部１３を貫通しかつ燃焼室に開口する噴
射孔２０が延びている。弁座面１４は、弁ニードル３０の先端部に設けられた、
対応して成形された閉鎖円錐体３１と協働する。閉鎖ばね（図示せず）によって
負荷された弁ニードル３０は、ノズル本体１０の入口側の領域に移動可能に案内
された案内区分と、この案内区分に続いて受圧面を介して減径された追従区分と
を有している。この追従区分の自由壁に閉鎖円錐体３１が一体成形されている。
弁ニードル３０の追従区分は、この追従区分を取り囲む孔１２の径よりも小さな
太さを有しているので、この追従区分は環状ギャップによって取り囲まれている
。この環状ギャップは、自体公知の形式で受圧面の高さで拡張されて、供給孔に
接続された室（図示せず）を形成している。An injection hole 20 that extends from the valve seat surface 14 as a starting point, penetrates the round raised portion 13, and opens to the combustion chamber. The valve seat surface 14 is provided at the tip of the valve needle 30.
It cooperates with a correspondingly shaped closing cone 31. The valve needle 30 loaded by a closing spring (not shown) is reduced in diameter via a guide section movably guided in the region of the nozzle body 10 on the inlet side and a pressure receiving surface following this guide section. And a following section. A closed cone 31 is integrally formed on the free wall of this follow-up section.
The follow-up section of the valve needle 30 has a thickness smaller than the diameter of the hole 12 surrounding the follow-up section, so that the follow-up section is surrounded by an annular gap. This annular gap is extended in a manner known per se at the level of the pressure-receiving surface to form a chamber (not shown) connected to the supply opening.

【００１３】 図１および特に図２から分かるように、噴射孔２０は、内燃機関の燃焼室に向
かって、最初は細まり、その後に再び拡がった横断面を有している。細まったス
ロート部分２１には、拡がったディフューザ部分２２が続いている。この点で、
噴射孔２０は「ラバルノズル」の形を有しているといえる。ラバルノズルの場合
と同様に、燃料噴射ノズルの細まったスロート部分２１では、噴射されるべき燃
料噴流の、より高い速度が生ぜしめられる。それに対して、燃料噴射ノズルの拡
がったディフューザ部分２２では、小さな粒子を有するスプレが生ぜしめられる
。したがって、燃料噴流の比較的高い速度に基づき、最大分配領域がノズルから
離れる方向へずらされるという望ましくない作用は、燃料噴射ノズルの拡がった
ディフューザ部分２２によって阻止される。これにより生じた、燃料噴流速度へ
の燃料噴流圧の「より穏やか」な変換は、燃料噴射ノズルのキャビテーション傾
向を低減させる。As can be seen from FIG. 1 and in particular from FIG. 2, the injection holes 20 have a cross-section that initially narrows and then widens again towards the combustion chamber of the internal combustion engine. The tapered throat portion 21 is followed by an expanded diffuser portion 22. In this regard,
It can be said that the injection hole 20 has the shape of a “Laval nozzle”. As in the case of the Laval nozzle, the narrow throat portion 21 of the fuel injection nozzle produces a higher velocity of the fuel jet to be injected. On the other hand, in the diffuser portion 22 where the fuel injection nozzle is widened, a spray having small particles is generated. Thus, the undesirable effect of shifting the maximum distribution area away from the nozzle due to the relatively high velocity of the fuel jet is prevented by the diffuser portion 22 of the fuel injection nozzle. The resulting "softer" conversion of fuel jet pressure to fuel jet velocity reduces the cavitation tendency of the fuel injection nozzle.

【００１４】 このような燃料噴射ノズルは、極めて有利には放電加工により製造することが
できる。この場合、噴射孔２０の種々異なる横断面形状は、パラメータである電
圧、電流の強さおよび送り速度を変化させることによって簡単に製作することが
できる。このような噴射孔２０を形成するための費用は、公知先行技術に基づき
公知の、流入横断面が流出横断面よりも大きく形成されているような円錐状の噴
射孔の場合よりも少なくなり得る。公知先行技術に基づき公知の燃料噴射ノズル
における流入開口は、多くの場合、付加的に液体浸食加工により丸く削られるの
で、上で説明した噴射孔２０を備えた燃料噴射ノズルを製造するための費用をむ
しろ減少させることができる。なぜならば、噴射開口を丸く削るための時間を減
少させるか、もしくはこの過程を不要にすることができるからである。Such a fuel injection nozzle can very advantageously be manufactured by electrical discharge machining. In this case, different cross-sectional shapes of the injection hole 20 can be easily manufactured by changing parameters such as voltage, current intensity and feed rate. The cost for forming such an orifice 20 can be less than for a conical orifice known from the prior art, in which the inflow cross-section is formed larger than the outflow cross-section. . The inflow openings in the known fuel injection nozzles according to the prior art are often additionally rounded by liquid erosion, so that the costs for manufacturing the fuel injection nozzle with the injection holes 20 described above are high. Can be rather reduced. This is because the time for rounding the injection opening can be reduced or this step can be made unnecessary.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 本発明による燃料噴射弁の下側領域の縦断面図である。FIG. 1 is a longitudinal sectional view of a lower region of a fuel injection valve according to the present invention.

【図２】 図１に示した燃料噴射ノズルのＩＩで示した部分の拡大図である。FIG. 2 is an enlarged view of a portion indicated by II of the fuel injection nozzle shown in FIG.

【符号の説明】[Explanation of symbols]

１０ ノズル本体、 １２ 孔、 １３ 丸形隆起部、 １４ 弁座面、 ２
０ 噴射孔、 ２１ スロート部分、 ２２ ディフューザ部分、 ３０ 弁ニ
ードル、 ３１ 閉鎖円錐体Reference Signs List 10 nozzle body, 12 holes, 13 round ridge, 14 valve seat surface, 2
0 injection hole, 21 throat part, 22 diffuser part, 30 valve needle, 31 closed cone

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 自己点火式の内燃機関のための燃料噴射ノズルであって、ノ
ズル本体（１０）に設けられた孔（１２）の、噴射側の端部に、円錐状の弁座面
（１４）が形成されており、該弁座面（１４）を起点にして噴射孔（２０）が延
びており、閉鎖力に抗して燃料流れ方向とは逆方向に開く弁ニードル（３０）が
設けられており、該弁ニードル（３０）が、前記孔（１２）の、噴射側の端部と
は反対の側の入口領域に移動可能に案内されており、弁ニードル（３０）の、弁
座面（１４）に面した側が閉鎖円錐体（３１）を有しており、該閉鎖円錐体（３
１）が弁座面（１４）と協働するようになっている形式のものにおいて、噴射孔
横断面が、内燃機関の燃焼室に向かって、最初は細まり、その後に再び拡がって
いることを特徴とする、自己点火式の内燃機関のための燃料噴射ノズル。1. A fuel injection nozzle for an internal combustion engine of a self-ignition type, comprising a conical valve seat surface (10) at an injection-side end of a hole (12) provided in a nozzle body (10). 14) is formed, the injection hole (20) extends from the valve seat surface (14) as a starting point, and a valve needle (30) that opens in the direction opposite to the fuel flow direction against the closing force is provided. Wherein the valve needle (30) is movably guided to an inlet area of the bore (12) opposite the injection-side end, and the valve needle (30) comprises a valve The side facing the seating surface (14) has a closing cone (31), said closing cone (3
1) of the type wherein the injection port cross section is adapted to cooperate with the valve seat surface (14), wherein the cross section of the injection hole initially narrows and then expands again towards the combustion chamber of the internal combustion engine. A fuel injection nozzle for a self-igniting internal combustion engine. 【請求項２】 噴射孔（２０）の横断面形状が、以下の形状のうちの１つ、
つまり、円形、楕円形、スリット形のうちの１つを有している、請求項１記載の
燃料噴射ノズル。2. The cross-sectional shape of the injection hole (20) is one of the following shapes:
That is, the fuel injection nozzle according to claim 1, which has one of a circular shape, an elliptical shape, and a slit shape. 【請求項３】 横断面の最小の噴射孔領域が、有利には軸方向の噴射孔延在
長さの真ん中に配置されている、請求項１記載の燃料噴射ノズル。3. The fuel injection nozzle according to claim 1, wherein the smallest orifice area of the cross section is arranged in the middle of the axial orifice extension.
JP2000577405A 1998-10-15 1999-07-16 Fuel injection nozzles for self-igniting internal combustion engines Pending JP2002527678A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19847460A DE19847460A1 (en) 1998-10-15 1998-10-15 Fuel injection valve nozzle with orifice at first converges then diverges to combustion chamber as circular elliptical or slot orifice section.
DE19847460.1 1998-10-15
PCT/DE1999/002204 WO2000023707A1 (en) 1998-10-15 1999-07-16 Fuel injection nozzle for internal combustion engines with self-ignition

Publications (1)

Publication Number Publication Date
JP2002527678A true JP2002527678A (en) 2002-08-27

Family

ID=7884510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000577405A Pending JP2002527678A (en) 1998-10-15 1999-07-16 Fuel injection nozzles for self-igniting internal combustion engines

Country Status (6)

Country Link
EP (1) EP1045982B1 (en)
JP (1) JP2002527678A (en)
KR (1) KR100627745B1 (en)
BR (1) BR9917602A (en)
DE (2) DE19847460A1 (en)
WO (1) WO2000023707A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007263114A (en) * 2006-03-27 2007-10-11 Robert Bosch Gmbh Injection nozzle for internal combustion engine and method of forming, in one workpiece, at least two passages to which different machining and molding are applied
JP2008516136A (en) * 2004-10-09 2008-05-15 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel injection valve
JP2009008087A (en) * 2007-06-26 2009-01-15 Delphi Technologies Inc Spray hole profile
JP2011149281A (en) * 2010-01-19 2011-08-04 Denso Corp Fuel injection valve and manufacturing method of the same
JP2016008550A (en) * 2014-06-24 2016-01-18 トヨタ自動車株式会社 Fuel injection valve working method
WO2017098905A1 (en) * 2015-12-11 2017-06-15 株式会社デンソー Fuel injection valve and manufacturing method therefor

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105674A1 (en) * 2001-02-08 2002-08-29 Siemens Ag Fuel injection nozzle for an internal combustion engine
JP3879909B2 (en) * 2001-03-29 2007-02-14 株式会社デンソー Fuel injection device
DE10124745A1 (en) * 2001-05-21 2003-03-27 Bosch Gmbh Robert Fuel injector
DE10360773A1 (en) * 2003-12-23 2005-07-28 Robert Bosch Gmbh Fuel injector
KR100742202B1 (en) * 2005-10-13 2007-07-24 진명이십일 (주) The injection nozzle structure of injector
DE102008051365B4 (en) 2008-10-15 2010-07-01 L'orange Gmbh Fuel injection valve for internal combustion engines
AT511880B1 (en) * 2011-09-06 2013-12-15 Bosch Gmbh Robert WEAR-OPTIMIZED MANUFACTURE OF TAPPY SPRAY HOLES
EP2884090B1 (en) 2013-12-11 2018-02-21 Continental Automotive GmbH Nozzle body and fuel injection valve
CN110805513B (en) * 2018-08-05 2021-06-01 大连理工大学 Nozzle with torsional elliptical spray holes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631135C (en) * 1934-08-19 1936-06-12 Wanderer Werke Vorm Winklhofer Process for the production of nozzle inserts assembled from several parts
DE2557772A1 (en) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag FUEL INJECTION VALVE
JPH05231273A (en) * 1992-02-19 1993-09-07 Hino Motors Ltd Fuel injection nozzle and manufacture thereof
EP0809017A1 (en) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Two-stage fuel injection nozzel for internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008516136A (en) * 2004-10-09 2008-05-15 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel injection valve
JP4646256B2 (en) * 2004-10-09 2011-03-09 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel injection valve
JP2007263114A (en) * 2006-03-27 2007-10-11 Robert Bosch Gmbh Injection nozzle for internal combustion engine and method of forming, in one workpiece, at least two passages to which different machining and molding are applied
JP2009008087A (en) * 2007-06-26 2009-01-15 Delphi Technologies Inc Spray hole profile
US8544770B2 (en) 2007-06-26 2013-10-01 Delphi Technologies Spray hole profile
JP2011149281A (en) * 2010-01-19 2011-08-04 Denso Corp Fuel injection valve and manufacturing method of the same
JP2016008550A (en) * 2014-06-24 2016-01-18 トヨタ自動車株式会社 Fuel injection valve working method
WO2017098905A1 (en) * 2015-12-11 2017-06-15 株式会社デンソー Fuel injection valve and manufacturing method therefor

Also Published As

Publication number Publication date
KR20010033112A (en) 2001-04-25
WO2000023707A1 (en) 2000-04-27
EP1045982A1 (en) 2000-10-25
KR100627745B1 (en) 2006-09-26
BR9917602A (en) 2002-10-01
DE59908951D1 (en) 2004-04-29
DE19847460A1 (en) 2000-04-20
EP1045982B1 (en) 2004-03-24

Similar Documents

Publication Publication Date Title
US6644565B2 (en) Fuel injection nozzle for self-igniting internal combustion engines
JP2659789B2 (en) Fuel injection valve
US4540126A (en) Fuel injection nozzle
JP2002527678A (en) Fuel injection nozzles for self-igniting internal combustion engines
US5934571A (en) Two-stage fuel-injection nozzle for internal combustion engines
US6427932B1 (en) Fuel injection nozzle for an internal combustion engine
US5996912A (en) Flat needle for pressurized swirl fuel injector
KR100287309B1 (en) Fuel Injection Nozzle for Internal Combustion Engines
US5044561A (en) Injection valve for fuel injection systems
CN100540881C (en) Fluid injection nozzle
US6546914B1 (en) Fuel injection valve for an internal combustion engine
JPS63248967A (en) Fuel injection nozzle
JP6474694B2 (en) Fuel injection nozzle
US7234654B2 (en) Fuel injector
JP4224666B2 (en) Fuel injection nozzle and processing method thereof
US20120223164A1 (en) Nozzle assembly for an injection valve and injection valve
CN106286056B (en) Fuel injection nozzle
JPH10331747A (en) Fuel injection nozzle and manufacture thereof
JP2002524685A (en) Fuel injection valve for internal combustion engine
GB2057057A (en) Fuel injector for diesel engine
JP4103291B2 (en) Fuel injection nozzle
EP0460326A1 (en) Fuel injection nozzles
JP3885853B2 (en) Fuel injection nozzle
JP2002535537A (en) Fuel injection valve for internal combustion engine
JP3924949B2 (en) Fuel injection nozzle

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060714

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090130

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20090904