JPH0681750A - Fuel injection nozzle used for diesel internal combustion engine and manufacture of said fuel injection nozzle - Google Patents
Fuel injection nozzle used for diesel internal combustion engine and manufacture of said fuel injection nozzleInfo
- Publication number
- JPH0681750A JPH0681750A JP16539793A JP16539793A JPH0681750A JP H0681750 A JPH0681750 A JP H0681750A JP 16539793 A JP16539793 A JP 16539793A JP 16539793 A JP16539793 A JP 16539793A JP H0681750 A JPH0681750 A JP H0681750A
- Authority
- JP
- Japan
- Prior art keywords
- outlet
- fuel injection
- deposition
- injection nozzle
- nozzle
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- 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
- F02M61/166—Selection of particular materials
-
- 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
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ディーゼル内燃機関に
用いられる燃料噴射ノズルであって、ノズルボディが設
けられていて、該ノズルボディで、移動可能に案内され
た弁ニードルが弁座と協働するようになっており、該弁
座に続いて下流側に、前記ノズルボディを貫通した噴射
孔が設けられている形式のものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection nozzle used in a diesel internal combustion engine, in which a nozzle body is provided, in which a valve needle guided movably cooperates with a valve seat. And an injection hole penetrating the nozzle body downstream of the valve seat.
【０００２】さらに、本発明はこのような形式の燃料噴
射ノズルを製造する方法に関する。Furthermore, the invention relates to a method of manufacturing a fuel injection nozzle of this type.
【０００３】[0003]
【従来の技術】このような形式の、「孔付きノズル」と
して知られる噴射ノズルでは、燃焼室内に噴射される燃
料噴流が噴射孔によって形成される。この噴射孔は一般
に同形状の円筒状に形成されている。噴流を形成するた
めには、ラバル（Ｌａｖａｌ）ノズル（ドイツ連邦共和
国特許出願公開第２５５７７７２号明細書）の形式によ
る噴射孔を構成することも既に公知である。環境保護の
目的で内燃機関のノイズ限界値や排ガス限界値を低減さ
せようとする圧力がますます強まる中で、噴射される燃
料の調製の一層の改善が要求されている。この場合、特
に一層渦流の少ない内燃機関の傾向を考慮して霧化品質
（液滴の大きさ）が特に重要となる。液滴の大きさと、
ノズルの噴射孔の横断面積とは直接に関連しているの
で、等しい噴射量において、少数の大きな噴射孔から多
数の小さな噴射孔への傾向が強まっている。しかし、極
端に狭い噴射孔の製造は汎用の製造法、たとえば切削穿
孔加工または浸食加工では限界がある。2. Description of the Prior Art In an injection nozzle of this type known as a "hole nozzle", a fuel jet injected into a combustion chamber is formed by injection holes. This injection hole is generally formed in the same cylindrical shape. It is also already known to configure the injection holes in the form of a Laval nozzle (German patent application DE 257 57 772) for forming a jet. As the pressure for reducing the noise limit value and exhaust gas limit value of an internal combustion engine for the purpose of environmental protection is increasing, further improvement of the preparation of injected fuel is required. In this case, the atomization quality (droplet size) is particularly important in consideration of the tendency of the internal combustion engine with less vortex flow. The size of the droplet,
Since it is directly related to the cross-sectional area of the nozzle injection holes, there is an increasing tendency from a small number of large injection holes to a large number of small injection holes at the same injection amount. However, the production of extremely narrow injection holes is limited by general-purpose production methods such as cutting and drilling or erosion.
【０００４】[0004]
【発明が解決しようとする課題】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、汎用の材料
切削加工法では製造不可能であるような噴射孔の有効横
断面積の減小が可能になるような燃料噴射ノズルを提供
することである。SUMMARY OF THE INVENTION The object of the present invention is to improve a fuel injection nozzle of the type mentioned at the outset to reduce the effective cross-sectional area of an injection hole which cannot be produced by a general-purpose material cutting method. An object of the present invention is to provide a fuel injection nozzle that can be reduced in size.
【０００５】さらに本発明の課題は、このような燃料噴
射ノズルを製造する有利な方法を提供することである。A further object of the invention is to provide an advantageous method of manufacturing such a fuel injection nozzle.
【０００６】[0006]
【課題を解決するための手段】この課題を解決するため
に本発明の構成では、噴射孔の出口に近い区分が、全周
にわたって固い被覆体によって狭められているようにし
た。In order to solve this problem, in the structure of the present invention, the section close to the outlet of the injection hole is narrowed by the solid covering over the entire circumference.
【０００７】さらに上記課題を解決するために本発明の
方法では、前製造された噴射孔を、少なくとも出口の近
くの区分で、固い被覆体の被着によって狭めるようにし
た。Further, in order to solve the above-mentioned problems, in the method of the present invention, the pre-manufactured injection hole is narrowed at least in the section near the outlet by applying a hard coating.
【０００８】[0008]
【発明の効果】本発明による燃料噴射ノズルは、次のよ
うな利点を持っている。すなわち、噴射孔に設けられた
被覆体によって、汎用の材料切削加工法では製造不可能
であったような噴射孔の有効横断面積の減小および／ま
たは変更が得られる。請求項２〜請求項４に記載の被覆
体の成形は、微細の噴射噴流の鋭い収束に役立つ。噴射
孔の出口端部の範囲における意図的な材料除去に基づ
き、特に噴射孔の出口に流れ通路のノズル状の減径が生
じるようになる。このような狭い、成形された噴射孔に
よって、微細の燃料噴流が形成され、このような燃料噴
流は流れの高い圧力と高い速度とを受けて、極めて微細
な液滴に噴霧される。The fuel injection nozzle according to the present invention has the following advantages. That is, the coating provided on the injection hole can reduce and / or change the effective cross-sectional area of the injection hole, which cannot be produced by a general-purpose material cutting method. The molding of the coating according to claims 2 to 4 serves for sharp convergence of a fine jet jet. Due to the intentional removal of material in the area of the outlet end of the injection hole, a nozzle-like diameter reduction of the flow channel occurs, especially at the outlet of the injection hole. Fine fuel jets are formed by such narrow, shaped injection holes, and such fuel jets are subjected to high pressure and high velocity of the flow to be sprayed into extremely fine droplets.
【０００９】噴射孔に被覆体を被着させるためには、請
求項５〜請求項７に記載の方法が適当である。The methods described in claims 5 to 7 are suitable for depositing the coating on the injection holes.
【００１０】[0010]
【実施例】以下に、本発明の実施例を図面につき詳しく
説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１１】ノズルボディ１は燃焼室側の端部の範囲
に、円錐状の弁座２を有している。この弁座はノズルボ
ディ１に移動可能に案内された、ばね弾性的な弁ニード
ル４の閉鎖円錐体３と協働する。燃料流れ方向で見て弁
座２の下方では、ノズルボディ１の丸頂部５に盲孔６が
設けられており、この盲孔からは、丸頂部５の周壁を貫
通した１つまたは複数の噴射孔１０が延びている。噴射
孔１０の入口は弁座２の範囲にも位置しており、内燃機
関の燃焼室の構成に応じて、噴射ノズルの長手方向軸線
に対して種々の噴射方向を有する１つまたは複数の噴射
孔が配置されていてよい。The nozzle body 1 has a conical valve seat 2 in the range of the end portion on the combustion chamber side. This valve seat cooperates with a closing cone 3 of a spring-elastic valve needle 4, which is movably guided in the nozzle body 1. Below the valve seat 2 when viewed in the direction of fuel flow, a blind hole 6 is provided in the round top 5 of the nozzle body 1, from which one or more injections penetrate the peripheral wall of the round top 5. The hole 10 extends. The inlet of the injection hole 10 is also located in the area of the valve seat 2 and, depending on the configuration of the combustion chamber of the internal combustion engine, one or more injections with different injection directions with respect to the longitudinal axis of the injection nozzle. The holes may be arranged.
【００１２】高い圧力を受けて通流する燃料を微細な噴
流に形成する噴射孔１０は、入口１１の近くの流入側区
分では円筒体の形状を有しており、出口１２の近くの区
分では流れ方向で先細りになる円錐台の形状を有してい
て、出口１２では拡がって、製造により生じた環状隆起
部を形成している。この環状隆起部は必要に応じて再び
除去することができる。噴射孔１０のこのようにノズル
状の形状は、まずノズルの丸頂部５の壁が材料除去、た
とえば切削加工による穿孔または材料の浸食除去により
貫通させられることによって形成される。この場合、円
筒状の孔が形成される。この孔は、０．２〜０．１ｍｍ
の範囲の内径を有している。その後に、孔の出口１２に
近い区分において、硬質材料、たとえばクロム、ニッケ
ルまたはこれに類するものから成る被覆体１６が孔１５
の周壁に被着される。被覆体１６は不均一な厚さで被着
されると有利である。これにより、開放横断面は出口１
２に向かって円錐台１４の形状で収束して、出口１２に
おいてノズルボディ１の丸頂部５の外面から突出した環
状隆起部１３によって拡がる。被覆体の最大厚さは、孔
の有効横断面積が約３０〜５０％だけ減じられるように
設定される。The injection hole 10 which receives a high pressure and forms the fuel flowing into a fine jet has a cylindrical shape in the inlet side section near the inlet 11 and has a cylindrical shape in the section near the outlet 12. It has the shape of a truncated cone that tapers in the direction of flow and widens at the outlet 12 to form an annular ridge produced by manufacturing. This annular ridge can be removed again if desired. This nozzle-like shape of the injection hole 10 is formed by first piercing the wall of the rounded tip 5 of the nozzle by material removal, for example by drilling by machining or erosion of material. In this case, a cylindrical hole is formed. This hole is 0.2 ~ 0.1mm
It has an inner diameter in the range of. Thereafter, in the section of the hole close to the outlet 12, a coating 16 of hard material, for example chromium, nickel or the like, is applied to the hole 15.
Is attached to the surrounding wall. The covering 16 is advantageously applied with a non-uniform thickness. As a result, the open cross section has an outlet 1
It converges in the shape of a truncated cone 14 towards 2 and widens at the outlet 12 by an annular ridge 13 protruding from the outer surface of the rounded top 5 of the nozzle body 1. The maximum thickness of the cladding is set so that the effective cross-sectional area of the holes is reduced by about 30-50%.
【００１３】前記横断面特性を形成するための有利な方
法は、電気化学的な析出（電気メッキ）による材料被着
である。電気化学的な析出法に関しては、特に水性電解
液からの陽極析出が簡単な手段である。その理由は、本
来の工具を成している電解溶液が直接に噴射孔に導入さ
れて、噴射孔壁に金属イオンが析出し得るからである。
この場合に、特にたとえば絶縁ラッカーを用いて丸頂部
５の外面をカバーすることによって、外側の噴射孔範囲
において電界線の集中が生じるので、このような意図的
な材料被着によって、噴射孔１０の出口１２に近い区分
で流れ通路のノズル状の減径部が形成される。横断面積
は材料の被着によって３０〜５０％だけ減じられる。A preferred method for forming the cross-sectional properties is material deposition by electrochemical deposition (electroplating). Regarding electrochemical deposition methods, anodic deposition, especially from aqueous electrolytes, is a simple means. The reason is that the electrolytic solution forming the original tool can be directly introduced into the injection hole, and metal ions can be deposited on the wall of the injection hole.
In this case, such intentional material deposition causes injection holes 10 to be concentrated, since electric field lines are concentrated in the outer injection hole area, in particular by covering the outer surface of the round top 5 with an insulating lacquer, for example. A nozzle-like reduced diameter portion of the flow passage is formed in a section close to the outlet 12 of the. The cross-sectional area is reduced by 30-50% depending on the material deposition.
【００１４】この被覆体を被着するためには、別の方法
も使用可能である。ＰＶＤ法（物理蒸着法）では、物理
的な析出プロセスにおいて、気相から蒸着、スパッタリ
ング、イオンプレーティングまたは前記方法の反応性変
化法によって被覆体が被着され、この場合、０．０１〜
０．１ｍｍの層厚さを得ることができる。ＣＶＤ法（化
学蒸着法）では、材料が蒸気相から熱、プラズマ活性
化、光子活性化またはレーザ誘導により析出される。こ
の場合、０．１ｍｍまでの層厚さが得られる。Other methods can be used to apply the coating. In the PVD method (physical vapor deposition method), in a physical deposition process, a coating is deposited from the vapor phase by vapor deposition, sputtering, ion plating or the reactivity change method of the above method, and in this case, 0.01 to
A layer thickness of 0.1 mm can be obtained. In the CVD method (chemical vapor deposition), the material is deposited from the vapor phase by heat, plasma activation, photon activation or laser induction. In this case, layer thicknesses of up to 0.1 mm are obtained.
【００１５】さらに別の有利な方法は、金属塩、還元
剤、錯生成剤ならびに別の化学薬品を含有している電解
質からの自触媒化学還元析出である。さらに、置換反応
や噴霧熱分解や均質沈殿において生じるような化学析出
も使用可能である。この場合に得られる層厚さは０．３
ｍｍまでである。Yet another advantageous method is autocatalytic chemical reduction deposition from an electrolyte containing metal salts, reducing agents, complexing agents as well as other chemicals. Furthermore, chemical precipitation as occurs in substitution reactions, spray pyrolysis and homogeneous precipitation can also be used. The layer thickness obtained in this case is 0.3
up to mm.
【００１６】さらに、金属溶融体からの析出、特に溶融
浸漬法が挙げられる。この溶融浸漬法では、場合によっ
ては加熱されたノズル丸頂部が、溶融された金属、たと
えば硬質金属ろうに浸漬される。負圧もしくは正圧下
に、溶融体が盲孔に「吸い込まれ」、引き続き再び「吹
き出される」。この方法では、ノズル基体への溶融体の
拡散が行なわれるだけでなく、溶融体も噴射孔壁に析出
し、これによって、冷却後に横断面積減小が得られる。
この方法を数回用いることによって、直径を適宜に減径
させることができる。Further, precipitation from a metal melt, particularly a melt dipping method, may be mentioned. In this melt dipping method, an optionally heated nozzle round top is dipped into a molten metal, such as a hard metal braze. Under negative or positive pressure, the melt "sucks" into the blind holes and then "blows out" again. This method not only allows the melt to diffuse into the nozzle substrate, but also deposits the melt on the injection hole walls, which results in a reduced cross-sectional area after cooling.
The diameter can be appropriately reduced by using this method several times.
【００１７】前記方法では、被着された層厚さもしくは
規定のハイドロリック通流量を決定する自由横断面積
が、加工時間の関数もしくは方法使用頻度の関数とな
る。In the above method, the layer thickness deposited or the free cross-sectional area which determines the defined hydraulic flow rate is a function of the processing time or the frequency of use of the method.
【００１８】被覆体を形成するための硬質物質として
は、クロム、ニッケル、ニッケル−リン、ニッケル−白
金−ホウ素、Ａｌ2Ｏ3、Ｃｒ2Ｏ3、ＴｉＯ2、Ｃｒ
3Ｃ2、ＳｉＯ2、ＡｌＳｉ、ＮｉＣｒ、ＷＴｉ、ＷＣま
たはこれに類するものが挙げられる。Hard materials for forming the coating include chromium, nickel, nickel-phosphorus, nickel-platinum-boron, Al 2 O 3 , Cr 2 O 3 , TiO 2 , Cr.
3 C 2 , SiO 2 , AlSi, NiCr, WTi, WC or the like.
【図１】本発明による燃料噴射ノズルの燃焼室側端部の
縦断面図である。FIG. 1 is a vertical sectional view of a combustion chamber side end portion of a fuel injection nozzle according to the present invention.
１ ノズルボディ、 ２ 弁座、 ３ 閉鎖円錐体、
４ 弁ニードル、 ５丸頂部、 ６ 盲孔、 １０ 噴
射孔、 １１ 入口、 １２ 出口、 １３環状隆起
部、 １４ 円錐台、 １５ 孔、 １６ 被覆体1 nozzle body, 2 valve seats, 3 closed cones,
4 valve needles, 5 round tops, 6 blind holes, 10 injection holes, 11 inlets, 12 outlets, 13 annular ridges, 14 truncated cones, 15 holes, 16 coatings
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ギュンター レーヴェンツ ドイツ連邦共和国 ヘミンゲン ヒルシュ シュトラーセ 27 (72)発明者 デトレフ ポッツ ドイツ連邦共和国 シュツットガルト−ノ ルト ヘルトヴェーク 100 (72)発明者 マンフレート レスラー ドイツ連邦共和国 シュツットガルト 60 イン デア アウ ９ (72)発明者 ルーディ オット ドイツ連邦共和国 ザクセンハイム−オク センバッハ アム フレッシュレ ５ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gunter Levents Hemingen Hirschstraße, Federal Republic of Germany 27 (72) Inventor Detlef Potts, Germany Stuttgart-Nord Herdweg 100 (72) Inventor Manfred Wrestler, Stuttgart, Federal Republic of Germany 60 Indeer Au 9 (72) Inventor Rudi Ott Germany Sachsenheim-Ochsenbach am Freshle 5
Claims (9)
射ノズルであって、ノズルボディが設けられていて、該
ノズルボディで、移動可能に案内された弁ニードルが弁
座と協働するようになっており、該弁座に続いて下流側
に、前記ノズルボディを貫通した噴射孔が設けられてい
る形式のものにおいて、噴射孔（１０）の出口（１２）
に近い区分が、全周にわたって固い被覆体（１６）によ
って狭められていることを特徴とする、ディーゼル内燃
機関に用いられる燃料噴射ノズル。1. A fuel injection nozzle for use in a diesel internal combustion engine comprising a nozzle body in which a movably guided valve needle cooperates with a valve seat. In the type in which an injection hole penetrating the nozzle body is provided downstream of the valve seat, the outlet (12) of the injection hole (10)
A fuel injection nozzle for a diesel internal combustion engine, characterized in that the section close to is narrowed by a solid covering (16) all around.
かって厚肉になっていて、流れ方向で減径した通流部が
形成されている、請求項１記載の燃料噴射ノズル。2. The fuel injection nozzle according to claim 1, wherein the covering (16) is thickened toward the outlet (12), and a flow passage portion having a reduced diameter in the flow direction is formed.
ズルボディ（１）の外周面に向かって丸く面取りされて
いる、請求項２記載の燃料噴射ノズル。3. The fuel injection nozzle according to claim 2, wherein the covering (16) is chamfered round at the outlet (12) toward the outer peripheral surface of the nozzle body (1).
の出口（１２）でノズルボディ（１）の外面から環状隆
起部（１３）として突出している、請求項３記載の燃料
噴射ノズル。4. The coating (16) comprises an injection hole (10).
4. A fuel injection nozzle according to claim 3, which projects at the outlet (12) of the nozzle body (1) as an annular ridge (13) from the outer surface of the nozzle body (1).
ケル−リン、ニッケル−ホウ素、ニッケル−白金−ホウ
素、Ａｌ2Ｏ3、Ｃｒ2Ｏ3、ＴｉＯ2、Ｃｒ3Ｃ2、Ｓｉ
Ｏ2、ＡｌＳｉ、ＮｉＣｒ、ＷＴｉ、ＷＣまたはこれに
類するもののような硬質物質から成っている、請求項１
から４までのいずれか１項記載の燃料噴射ノズル。5. The coating is chromium, nickel, nickel-phosphorus, nickel-boron, nickel-platinum-boron, Al 2 O 3 , Cr 2 O 3 , TiO 2 , Cr 3 C 2 , Si.
O 2, AlSi, NiCr, WTi, is made of hard material such as WC or its similar ones, claim 1
The fuel injection nozzle according to any one of items 1 to 4.
の燃料噴射ノズルを製造する方法であって、ノズルボデ
ィの内部から外方に通じた少なくとも１つの噴射孔を、
材料除去によって形成する形式のものにおいて、前製造
された噴射孔（１０）を、少なくとも出口（１２）の近
くの区分で、固い被覆体（１６）の被着によって狭める
ことを特徴とする、燃料噴射ノズルの製造法。6. A method for manufacturing the fuel injection nozzle according to claim 1, wherein at least one injection hole communicating from the inside to the outside of the nozzle body is provided.
Fuel of the type formed by material removal, characterized in that the prefabricated injection hole (10) is narrowed by the application of a solid cladding (16) at least in the section near the outlet (12). Manufacturing method of injection nozzle.
（１２）の近くの区分で、被覆によって被着させる、請
求項６記載の方法。7. The method according to claim 6, wherein the coating is applied by coating in a section near the outlet (12) of the injection hole (10).
料を前記出口に向かって増量するように堆積させる、請
求項７記載の方法。8. A method as claimed in claim 7, characterized in that in a section near the outlet (12) the cladding material is deposited in increasing amounts towards said outlet.
出、化学的な析出、ＣＶＤ析出、ＰＶＤ析出または金属
性の溶融体からの析出によって形成する、請求項６から
８までのいずれか１項記載の方法。9. The coating according to claim 6, wherein the coating (16) is formed by electrochemical deposition, chemical deposition, CVD deposition, PVD deposition or deposition from a metallic melt. The method according to item 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924222137 DE4222137B4 (en) | 1992-07-06 | 1992-07-06 | Fuel injector for diesel internal combustion engines |
| DE4222137.4 | 1992-07-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0681750A true JPH0681750A (en) | 1994-03-22 |
| JP3307722B2 JP3307722B2 (en) | 2002-07-24 |
Family
ID=6462576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16539793A Expired - Fee Related JP3307722B2 (en) | 1992-07-06 | 1993-07-05 | Fuel injection nozzle used in diesel internal combustion engine and method of manufacturing fuel injection nozzle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3307722B2 (en) |
| DE (1) | DE4222137B4 (en) |
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|---|---|---|---|---|
| US2044697A (en) * | 1935-12-28 | 1936-06-16 | Huss Henry | Nozzle |
| DE2557772A1 (en) * | 1975-12-20 | 1977-06-23 | Kloeckner Humboldt Deutz Ag | FUEL INJECTION VALVE |
| JP3224657B2 (en) * | 1992-11-25 | 2001-11-05 | 株式会社小松製作所 | Laser marking device and method |
-
1992
- 1992-07-06 DE DE19924222137 patent/DE4222137B4/en not_active Expired - Fee Related
-
1993
- 1993-07-05 JP JP16539793A patent/JP3307722B2/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| JP3307722B2 (en) | 2002-07-24 |
| DE4222137A1 (en) | 1994-01-13 |
| DE4222137B4 (en) | 2006-05-04 |
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