JPS6380065A - Jet nozzle structure - Google Patents
Jet nozzle structureInfo
- Publication number
- JPS6380065A JPS6380065A JP22192086A JP22192086A JPS6380065A JP S6380065 A JPS6380065 A JP S6380065A JP 22192086 A JP22192086 A JP 22192086A JP 22192086 A JP22192086 A JP 22192086A JP S6380065 A JPS6380065 A JP S6380065A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- tip
- nozzle body
- needle valve
- seated
- 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
- 239000002184 metal Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 abstract description 6
- 239000000446 fuel Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は燃料を霧化して内燃機関へ供給する噴射ノズル
に係り、特にノズル本体を金属でノズル先端部をセラミ
ックスで形成した噴射ノズル構造に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an injection nozzle that atomizes fuel and supplies it to an internal combustion engine, and particularly relates to an injection nozzle structure in which the nozzle body is made of metal and the nozzle tip is made of ceramics. .
［従来の技術］
内燃機関の燃焼室にノズル先端部を臨ませて配設される
噴射ノズルは、常時燃焼ガスに曝されるため高温強度が
要求される。このため本出願人は特開昭５８−１４３１
６号公報に少なくともノズルボディの先端となる噴口部
をＳｉ３Ｎ４またはＡｌ２ｚＯｓ等のセラミックスで形
成したエンジン用燃料噴射ノズルを提案している。[Prior Art] An injection nozzle disposed with its nozzle tip facing the combustion chamber of an internal combustion engine is required to have high-temperature strength because it is constantly exposed to combustion gas. For this reason, the present applicant
Japanese Patent No. 6 proposes a fuel injection nozzle for an engine in which at least the injection port, which is the tip of the nozzle body, is formed of ceramics such as Si3N4 or Al2zOs.
［発明が解決しようとする問題点］
セラミックスは金属材料に比べて■熱膨張係数が小さい
、■大きな耐熱衝撃性をもつ、■熱伝導度が小さいなど
の浸れた長所をもつ。[Problems to be Solved by the Invention] Compared to metal materials, ceramics have significant advantages such as: ■low coefficient of thermal expansion, ■high thermal shock resistance, and ■low thermal conductivity.
しかじ噴口部をセラミックス、ノズル本体を金属で形成
し、これらを一体に接続する技術については構造、コス
ト上で改善の余地を残していた。The technique of forming the spout part from ceramics and the nozzle body from metal, and connecting them together, left room for improvement in terms of structure and cost.
［問題点を解決するための手段］
本発明は上記問題点を解決することを目的として、針弁
を昇降自在に収容する金属製ノズル本体に、該針弁が着
座するシート部を形成すると共に、該シート部より先端
部を半径方向内方へ折り曲げてセラミック類のノズル先
端部を一体に接続して噴射ノズル構造を成すものである
。[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems by forming a seat portion on which the needle valve is seated in a metal nozzle body that accommodates the needle valve so as to be able to move up and down. The distal end portion of the sheet portion is bent radially inward and the ceramic nozzle distal end portions are integrally connected to form an injection nozzle structure.
［作 用〕
ノズル本体部の拡径部に軟質金属シートを着座させ、次
いでその金属シートにセラミック類のノズル先端部を着
座させて嵌合した後、上記ノズル本体先端部を、そのノ
ズル先端部のテーバ面に沿って半径方向に折り曲げるこ
とによって、金属製のノズル本体とセラミック類のノズ
ル先端部を一体に接続することができる。また、ノズル
本体部とノズル先端部との間に軟かい硬度をもつ金属シ
ートを介設したで、この金属シートがそれぞれの接合面
を保護すると共に接合面間で高シール性を発揮する。[Operation] A soft metal sheet is seated on the enlarged diameter part of the nozzle body, and then a ceramic nozzle tip is seated on the metal sheet and fitted, and then the nozzle body tip is placed on the nozzle tip. By bending the metal nozzle body in the radial direction along the tapered surface, the metal nozzle body and the ceramic nozzle tip can be integrally connected. Furthermore, since a metal sheet with soft hardness is interposed between the nozzle main body and the nozzle tip, this metal sheet protects the respective joint surfaces and exhibits high sealing performance between the joint surfaces.
［実施例］
以下にこの発明の噴射ノズル構造の好適−実施類を添付
図面に基づいて説明する。[Example] Preferred embodiments of the injection nozzle structure of the present invention will be described below with reference to the accompanying drawings.
第１図に示されるように円筒状のノズル本体１内には半
径方向に適度なりリアランスを有して針弁２が昇降自在
に収容される針弁収容部３が形成されている。この針弁
収容部３の先端部側には、上記針弁２のシート部４を着
座させるシート部５が形成されている。As shown in FIG. 1, a cylindrical nozzle body 1 is provided with a needle valve accommodating portion 3 in which a needle valve 2 is accommodated with a moderate clearance in the radial direction so as to be movable up and down. A seat portion 5 on which the seat portion 4 of the needle valve 2 is seated is formed on the distal end side of the needle valve accommodating portion 3 .
ノズル本体１は鉄または鉄系金属にて形成される。The nozzle body 1 is made of iron or iron-based metal.
上記シート部５より先端側となるノズル収容部３は、こ
のノズル収容部３の軸方向に沿った部分が半径方向に拡
径されており、この部分が円筒状の拡径部６となってい
る。この拡径部６には、軟かい硬度を持つ材料、例えば
銅、銅系金属の金属シート７を介してセラミックスを焼
成して形成したノズル先端部（ＳｉｙＮ４）８が嵌合さ
れる。The nozzle accommodating portion 3 located on the distal end side of the seat portion 5 has a diameter expanded in the radial direction at a portion along the axial direction of the nozzle accommodating portion 3, and this portion becomes a cylindrical expanded diameter portion 6. There is. A nozzle tip (SiyN4) 8 formed by firing ceramics through a metal sheet 7 of a material having a soft hardness, such as copper or a copper-based metal, is fitted into the enlarged diameter portion 6.
このノズル先端部８は上記針弁２の先端部の外形状に合
せて断面Ｖ字形に形成されており、その傾斜方向に対し
て交差する方向に燃料の噴口１ｏが形成されている。こ
の噴口１０はノズル先端部８の焼成と同時に形成される
ので、噴口１０の形状を異形にすることも、また方向や
噴口直径なども精度よく形成することが可能である。The nozzle tip 8 is formed to have a V-shaped cross section to match the outer shape of the tip of the needle valve 2, and a fuel nozzle 1o is formed in a direction intersecting the inclination direction of the nozzle tip 8. Since the nozzle 10 is formed at the same time as the nozzle tip 8 is fired, the nozzle 10 can have an irregular shape, and the direction and diameter of the nozzle can be formed with high accuracy.
さて、このような形状のノズル先端部８を上記拡径部６
に収容した後、この拡径部６の先端側をノズル先端部８
の外面となねテーバ面９に沿うように半径方向内方へ折
り曲げると、ノズル先端部８はノズル本体１に一体的に
接続されることになる。このとき金属シート７はノズル
先端部８の接合面１１と拡径部６の接合面１２との間を
シールし且つそれら接合面１０．１１を保護することに
寄与する。Now, the nozzle tip 8 having such a shape is connected to the enlarged diameter part 6.
After housing the expanded diameter portion 6 in the nozzle tip 8, the tip side of the enlarged diameter portion 6 is
The nozzle tip 8 is integrally connected to the nozzle body 1 by bending it radially inward along the outer surface and the flat taper surface 9 . At this time, the metal sheet 7 serves to seal between the joint surface 11 of the nozzle tip 8 and the joint surface 12 of the enlarged diameter section 6 and to protect these joint surfaces 10.11.
また１３は噴口１０へ燃料を導く溝で、この溝１３を形
成することによって噴口１０への燃料の流れが向上する
。Further, 13 is a groove that guides the fuel to the nozzle 10, and by forming this groove 13, the flow of fuel to the nozzle 10 is improved.
尚、拡径部６で折り曲げられる基部には、必要に応じて
円周方向の環状溝を形成して折り曲げ（カシメ）加工を
安定させることも可能であり、さらに上記金属シート７
を円周方向に沿って波状に形成して適度なスプリングバ
ックを与えることも可能である。In addition, it is possible to form a circumferential annular groove in the base part bent at the enlarged diameter part 6 to stabilize the bending (crimping) process, if necessary.
It is also possible to provide an appropriate springback by forming the wavy shape along the circumferential direction.
さらに、実施例の説明では拡径部６の先端を折り曲げる
説明をしたが、ノズル本体１の先端に円周方向に間隔を
おいてノズル本体１にノズル先端部８を折り曲げて一体
接続する舌部を形成しても良い。Furthermore, in the description of the embodiment, the tip of the enlarged diameter portion 6 was explained as being bent, but there are tongues at the tip of the nozzle body 1 that are integrally connected to the nozzle body 1 by bending the nozzle tip 8 at intervals in the circumferential direction. may be formed.
［発明の効果］
以上説明したことから明らかなように、本発明の噴射ノ
ズル構造によれば次のごとき優れた効果を発揮できる。[Effects of the Invention] As is clear from the above explanation, the injection nozzle structure of the present invention can exhibit the following excellent effects.
（１）鉛弁を昇降自在に収容する金属製ノズル本体に、
その針弁のシート面が着座するシート部を形成すると共
に、そのシート部より先端側に半径方向内方へ折り曲げ
ることによりセラミック類のノズル先端部を一体に接続
したので、針弁の着座時に生じる衝撃力がノズル先端部
に加えられなくなり耐久性を大幅に向上できる。(1) The metal nozzle body accommodates the lead valve so that it can be raised and lowered,
The seat surface of the needle valve forms a seating part, and the tip of the ceramic nozzle is integrally connected by bending radially inward from the seat part to the tip side, so this problem occurs when the needle valve is seated. No impact force is applied to the nozzle tip, greatly improving durability.
（２） ノズル本体にノズル先端部を接続する時間が
大幅に短縮されると共に、その接続に於いてノズル先端
部に熱を加えることがないので、予め熱処理済のノズル
先端部に熱硬化を生じさせることなく接続できる。(2) The time required to connect the nozzle tip to the nozzle body is significantly shortened, and since no heat is applied to the nozzle tip during the connection, no heat hardening occurs in the nozzle tip, which has already been heat-treated. You can connect without any trouble.
第１図は本発明の噴射ノズル構造の好適一実施例を示す
縦断面図である。
図中、１はノズル本体、２は針弁、６は拡径部、７は金
属シート、８はノズル先端部である。
特許出願人 いす望自動車株式会社
代理人弁理士 絹 谷 信 雄
第１図FIG. 1 is a longitudinal sectional view showing a preferred embodiment of the injection nozzle structure of the present invention. In the figure, 1 is a nozzle main body, 2 is a needle valve, 6 is an enlarged diameter portion, 7 is a metal sheet, and 8 is a nozzle tip. Patent Applicant: Isubo Jidosha Co., Ltd. Representative Patent Attorney: Nobuo Kinutani Figure 1
Claims (3)
、該針弁が着座するシート部を形成すると共に、該シー
ト部より先端側を半径方向内方へ折り曲げてセラミック
製のノズル先端部を上記ノズル本体に一体に接続したこ
とを特徴とする噴射ノズル構造。(1) A metal nozzle body that accommodates a needle valve so as to be able to move up and down is provided with a seat portion on which the needle valve sits, and the tip side of the seat portion is bent radially inward to form a ceramic nozzle tip portion. An injection nozzle structure characterized in that: is integrally connected to the nozzle body.
に軟質金属シートを介設された上記特許請求の範囲第１
項記載の噴射ノズル構造。(2) Claim 1, wherein the nozzle body and the nozzle tip have a soft metal sheet interposed therebetween.
Injection nozzle structure described in section.
トとノズル先端部とを順次嵌合する筒状の拡径部を有し
、その拡径部の先端部を上記ノズル先端部のテーパ面に
沿って折り曲げるように形成された特許請求の範囲第１
項または第２項記載の噴射ノズル構造。(3) The nozzle main body has a cylindrical enlarged diameter portion at its tip portion into which the metal sheet and the nozzle tip fit sequentially, and the tip of the enlarged diameter portion is connected to the tapered surface of the nozzle tip. Claim 1 formed so as to be folded along
The injection nozzle structure according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22192086A JPS6380065A (en) | 1986-09-22 | 1986-09-22 | Jet nozzle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22192086A JPS6380065A (en) | 1986-09-22 | 1986-09-22 | Jet nozzle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6380065A true JPS6380065A (en) | 1988-04-11 |
Family
ID=16774227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22192086A Pending JPS6380065A (en) | 1986-09-22 | 1986-09-22 | Jet nozzle structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6380065A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921084B2 (en) * | 1977-07-20 | 1984-05-17 | ティーディーケイ株式会社 | High density recording method |
-
1986
- 1986-09-22 JP JP22192086A patent/JPS6380065A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921084B2 (en) * | 1977-07-20 | 1984-05-17 | ティーディーケイ株式会社 | High density recording method |
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