JP2507325Y2 - Fuel valve - Google Patents
Fuel valveInfo
- Publication number
- JP2507325Y2 JP2507325Y2 JP8453089U JP8453089U JP2507325Y2 JP 2507325 Y2 JP2507325 Y2 JP 2507325Y2 JP 8453089 U JP8453089 U JP 8453089U JP 8453089 U JP8453089 U JP 8453089U JP 2507325 Y2 JP2507325 Y2 JP 2507325Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- shrink
- needle valve
- fuel
- cylinder cover
- 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.)
- Expired - Fee Related
Links
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は内燃機関に適用される燃料弁に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fuel valve applied to an internal combustion engine.
（従来の技術） この種燃料弁としてノズルを針弁ガイドに焼嵌めした
ものは公知である。(Prior Art) As this kind of fuel valve, a nozzle in which a nozzle is shrink-fitted into a needle valve guide is known.
第５図はこのような燃料弁の従来例を示すもので、針
弁ガイド（ａ）に焼嵌めされたノズル（ｂ）は、その焼
嵌部の径d3と、その先端のシリンダカバー（ｃ）に嵌入
されるカバー挿入部の径d4とは、ノズル（ｂ）が針弁ガ
イド（ａ）の油溜り（ｄ）の燃料圧力によって押出され
ないようにd3＞d4として段差（ｅ）が設けられ、その段
差（ｅ）で針弁ガイド（ａ）に抜止め係止されると共に
針弁ガイド（ａ）の下面とシリンダカバー（ｃ）との当
接部（ｆ）でガスシールされている。FIG. 5 shows a conventional example of such a fuel valve. The nozzle (b) shrink-fitted to the needle valve guide (a) has a shrinkage fitting diameter d 3 and a cylinder cover ( The diameter d 4 of the cover insertion part that is fitted into c) is defined as d 3 > d 4 so that the nozzle (b) is not pushed out by the fuel pressure of the oil sump (d) of the needle valve guide (a) and the step (e ) Is provided, and the step (e) prevents the needle valve guide (a) from being disengaged and locked, and the lower surface of the needle valve guide (a) and the cylinder cover (c) contact part (f) with a gas seal. Has been done.
（考案が解決しようとする課題） しかしながら上述の如く段差（ｅ）で針弁ガイド
（ａ）に抜止め係止されるノズル（ｂ）はその焼嵌めの
ため針弁（ｇ）の挿入孔側から挿入しなければならず、
従って針弁（ｇ）の径d2はd2＞d3とするためd2は燃料弁
において機能上必要な径より大きくなり、この針弁
（ｇ）の径が大きくなると燃料圧力の受圧面積が広くな
り該針弁（ｇ）の押棒（ｈ）を介してノズル（ｂ）をシ
ートに押し付けるばねの力も大きくする必要があり、ば
ね径の増大、ひいては弁本体の重量増大を免くと共に焼
嵌部から燃料が洩れた場合針弁ガイド（ａ）下部の当接
部（ｆ）でのシールではこれをシールすることが出来ず
シリンダの中に流れ込む欠点があった。(Problems to be solved by the invention) However, as described above, the nozzle (b), which is retained and locked by the needle valve guide (a) at the step (e), is shrink-fitted and the nozzle (b) is inserted into the insertion hole side of the needle valve (g). Must be inserted from
Therefore, since the diameter d 2 of the needle valve (g) is d 2 > d 3 , d 2 becomes larger than the diameter required for the function of the fuel valve. When the diameter of the needle valve (g) becomes large, the fuel pressure receiving area is increased. It becomes necessary to increase the force of the spring that presses the nozzle (b) against the seat via the push rod (h) of the needle valve (g), which avoids an increase in the spring diameter and, in turn, an increase in the weight of the valve body, as well as burning. If the fuel leaks from the fitting portion, it cannot be sealed by the seal at the contact portion (f) at the lower part of the needle valve guide (a), and there is a drawback that it flows into the cylinder.
本考案はかゝる欠点を改良するためなされたものであ
ってノズルにシート面を設けてシリンダ内への燃料洩を
防止すると共にノズルの焼嵌めを容易にすることを目的
とする。The present invention has been made to remedy such drawbacks, and an object thereof is to provide a seat surface on the nozzle to prevent fuel leakage into the cylinder and to facilitate shrink fitting of the nozzle.
（課題を解決するための手段） 上記の目的を達成するための本考案の構成を実施例に
対応する第１図乃至第４図を用いて説明すると本考案は
針弁ガイド（３）に焼嵌めされる焼嵌め部（7a）とシリ
ンダカバー（８）に挿入されるカバー挿入部（7b）とを
有するノズル（７）に、シリンダカバー（８）と接触す
る受圧部（９）を形成したことを特徴とする。(Means for Solving the Problems) The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 4 corresponding to the embodiment. The present invention is applied to a needle valve guide (3). A nozzle (7) having a shrink-fitting portion (7a) to be fitted and a cover inserting portion (7b) to be inserted into the cylinder cover (8) was provided with a pressure receiving portion (9) in contact with the cylinder cover (8). It is characterized by
（作用） そして本考案は上記の手段により針弁ガイド（３）の
針弁径はこれをノズル（７）の焼嵌め径に関係なく、弁
として機能上必要な径に決定できるため、その針弁を押
圧するばねのばね力を必要最小にすることができるため
ばね及び弁本体を小さくすることができると共にノズル
（７）の受圧部（９）でシリンダ内のガス圧をシールし
ているため焼嵌め部から洩れた燃料が受圧部でシールさ
れてシリンダ内に流れ込むことがない。(Effect) According to the present invention, the needle valve diameter of the needle valve guide (3) can be determined to be a diameter necessary for the function of the valve regardless of the shrink fitting diameter of the nozzle (7) by the above means. Since the spring force of the spring for pressing the valve can be minimized, the spring and the valve body can be made small, and the gas pressure in the cylinder is sealed by the pressure receiving portion (9) of the nozzle (7). The fuel leaking from the shrink fitting section is sealed by the pressure receiving section and does not flow into the cylinder.
（実施例） 以下第１図乃至第４図について本考案の一実施例を説
明すると（１）は弁本体を示し、該弁本体（１）の一端
には締付金具（２）を介して針弁ガイド（３）が取付け
られ、該針弁ガイド（３）には弁本体（１）内の押棒
（４）によって押圧される針弁（５）と、該針弁（５）
の先端が着座するシート（６）を有するノズル（７）と
が設けられ該ノズル（７）には針弁ガイド（３）に焼嵌
めされる焼嵌め部（7a）とシリンダカバー（８）に挿入
されるカバー挿入部（7b）との間にシリンダカバー
（８）と接触する受圧部（９）が形成されると共にその
焼嵌め部（7a）の外周には第２図及び第３図に示すよう
に周方向に複数の周溝（10）と該周溝（10）を連結して
外部へ開口する連通溝（11）とが設けられ、更に弁本体
（１）は第４図に示すようにノズル（７）の受圧部
（９）でシリンダカバー（８）のノズル挿入口の内端面
に押し付けられるように締付ボルト（12）でシリンダカ
バー（８）に取付けられている。図中（13）は油通路、
（14）は油溜り部を示す。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. (1) shows a valve body, and one end of the valve body (1) is provided with a clamp (2). A needle valve guide (3) is attached, and the needle valve (3) is pressed by a push rod (4) in the valve body (1), and the needle valve (5).
A nozzle (7) having a seat (6) on which the tip of the seat is seated, and the nozzle (7) has a shrink fitting part (7a) shrink fitted to the needle valve guide (3) and a cylinder cover (8). A pressure receiving portion (9) that comes into contact with the cylinder cover (8) is formed between the cover insertion portion (7b) to be inserted and the outer periphery of the shrink fitting portion (7a) is shown in FIGS. 2 and 3. As shown, a plurality of circumferential grooves (10) and a communication groove (11) that connects the circumferential grooves (10) and opens to the outside are provided in the circumferential direction, and the valve body (1) is shown in FIG. As described above, the pressure receiving portion (9) of the nozzle (7) is attached to the cylinder cover (8) with a tightening bolt (12) so as to be pressed against the inner end surface of the nozzle insertion opening of the cylinder cover (8). In the figure, (13) is the oil passage,
(14) indicates an oil sump.
かくてノズル（７）に設けた受圧部（９）によりノズ
ル（７）が油溜り部（14）の燃料圧力により押出される
力を受けて、ノズル（７）を針弁ガイド（３）の下方よ
り挿入焼嵌め可能とするため、針弁（５）の径はノズル
（７）の径に関係なく設定されて針弁（５）をシートに
押し付けるばね力も小さく設定され、又ノズル（７）の
受圧部（９）は弁本体（１）の締付ボルト（12）でシリ
ンダカバー（８）に締付けられているため、シリンダ内
のガス圧力をシールすると共に、ノズル（７）が燃料圧
力で押出される力を有効に受けることが出来、更に焼嵌
め部（7a）の外周の周溝（10）は焼嵌め面積を減らし、
同じ焼嵌めしろで面圧をより高くして燃料の焼嵌め部か
らの洩れを防止すると共に焼嵌め部（7a）に滲透する燃
料は連通溝（11）を介して外部に放出されるため滲透燃
料によって焼嵌め部（7a）の焼嵌め摩擦力が低下するこ
とがない。Thus, the pressure receiving part (9) provided in the nozzle (7) receives the force of pushing the nozzle (7) by the fuel pressure of the oil sump (14), and the nozzle (7) is guided by the needle valve guide (3). The diameter of the needle valve (5) is set irrespective of the diameter of the nozzle (7) so that the insertion and shrink fitting can be performed from below, and the spring force for pressing the needle valve (5) against the seat is also set small, and the nozzle (7) is also set. The pressure receiving portion (9) of the valve body (1) is fastened to the cylinder cover (8) with the tightening bolts (12) of the valve body (1). It can effectively receive the pushing force, and the peripheral groove (10) on the outer periphery of the shrink fitting part (7a) reduces the shrink fitting area,
With the same shrink fit, the surface pressure is made higher to prevent leakage of fuel from the shrink fit portion, and the fuel that permeates into the shrink fit portion (7a) is discharged to the outside through the communication groove (11) so that it permeates. The shrink fitting frictional force of the shrink fitting portion (7a) does not decrease due to the fuel.
（考案の効果） このように本考案によるときは針弁ガイド（３）に焼
嵌めされる焼嵌め部（7a）とシリンダカバー（８）に挿
入されるカバー挿入部（7b）とを有するノズル（７）に
はシリンダカバー（８）と接触する受圧部（９）を形成
したものであるから、ノズル（７）は受圧部（９）によ
り燃料圧力による押出し力を受けて、ノズル（７）を針
弁ガイド（３）の下方よりの挿入焼嵌めを可能とするた
めノズル直径、針弁直径等を小さくして燃料弁本体の小
型化、重量低減化が容易となって組立作業が簡便化する
と共に焼嵌部からの燃料洩れもシリンダ内に流れ込むこ
とがないので機関性能を悪化させることなく信頼性の向
上が図られる等の効果を有する。(Effects of the Invention) As described above, according to the present invention, the nozzle having the shrink fitting portion (7a) shrink fitted to the needle valve guide (3) and the cover inserting portion (7b) inserted into the cylinder cover (8). Since the pressure receiving part (9) which contacts the cylinder cover (8) is formed in (7), the nozzle (7) receives the pushing force by the fuel pressure by the pressure receiving part (9), and the nozzle (7) Since it is possible to insert and shrink-fit the needle valve guide (3) from below, the nozzle diameter, needle valve diameter, etc. can be reduced to facilitate downsizing and weight reduction of the fuel valve body, simplifying assembly work. In addition, fuel leakage from the shrink fitting portion does not flow into the cylinder, so that there is an effect that reliability is improved without deteriorating engine performance.
第１図は本考案の一実施例を示す断面図、第２図は第１
図の一部拡大図、第３図は第２図Ａ−Ａ線矢視図、第４
図は燃料弁の概略図、第５図は従来例の断面図である。 （３）…針弁ガイド、（７）…ノズル （7a）…焼嵌め部、（7b）…カバー挿入部 （８）…シリンダカバー、（９）…受圧部 （10）…周溝、（11）…連通溝FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is a partially enlarged view of FIG. 3, FIG. 3 is a view of FIG.
FIG. 5 is a schematic view of a fuel valve, and FIG. 5 is a sectional view of a conventional example. (3) ... Needle valve guide, (7) ... Nozzle (7a) ... Shrink fitting section, (7b) ... Cover insertion section (8) ... Cylinder cover, (9) ... Pressure receiving section (10) ... Circumferential groove, (11 ) ... Communication groove
Claims (2)
リンダカバーに挿入されるカバー挿入部とを有するノズ
ルに、シリンダカバーと接触する受圧部を形成したこと
を特徴とする燃料弁。1. A fuel valve comprising a nozzle having a shrink-fitting portion that is shrink-fitted to a needle valve guide and a cover insertion portion that is inserted into a cylinder cover, and a pressure-receiving portion that is in contact with the cylinder cover. .
連結して外部へ開口する連通溝とを設けたことを特徴と
する請求項１記載の燃料弁。2. The fuel valve according to claim 1, wherein the shrink-fitting portion is provided with a plurality of peripheral grooves and a communication groove connecting the peripheral grooves and opening to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8453089U JP2507325Y2 (en) | 1989-07-20 | 1989-07-20 | Fuel valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8453089U JP2507325Y2 (en) | 1989-07-20 | 1989-07-20 | Fuel valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0323654U JPH0323654U (en) | 1991-03-12 |
| JP2507325Y2 true JP2507325Y2 (en) | 1996-08-14 |
Family
ID=31633075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8453089U Expired - Fee Related JP2507325Y2 (en) | 1989-07-20 | 1989-07-20 | Fuel valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507325Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7182626B2 (en) * | 2018-06-19 | 2022-12-02 | シャープ株式会社 | Hair dryer blowout structure, hair dryer and how to use hair dryer |
-
1989
- 1989-07-20 JP JP8453089U patent/JP2507325Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0323654U (en) | 1991-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |