JPH0432264U - - Google Patents
Info
- Publication number
- JPH0432264U JPH0432264U JP7297490U JP7297490U JPH0432264U JP H0432264 U JPH0432264 U JP H0432264U JP 7297490 U JP7297490 U JP 7297490U JP 7297490 U JP7297490 U JP 7297490U JP H0432264 U JPH0432264 U JP H0432264U
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- needle valve
- valve
- axial direction
- nozzle body
- 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
- 239000000446 fuel Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図から第１３図までの図面はこの考案の実
施例を示すものであり、第１図は第１の考案によ
る燃料噴射ノズルの縦断面図、第２図は同ノズル
の閉弁状態を示すノズルボデイ及び針弁の先端部
の拡大断面図、第３図、第４図はそれぞれ同ノズ
ルの開弁状態を示す第２図に相当する拡大断面図
である。第５図は横軸にカム角度、縦軸に噴射燃
料の貫通力をとつたグラフであり、第６図から第
９図は第５図のＡ点からＤ点に対応する時点にお
ける燃料噴射の様子を示す図である。又、第１０
図は第２の考案による燃料噴射ノズルの縦断面図
、第１１図は同ノズルの第２図に相当する拡大断
面図、第１２図は同ノズルの要部拡大断面図であ
り、第１３図は第２の考案による燃料噴射ノズル
の他の実施例における第１２図に相当する要部拡
大断面図である。又、第１４図は従来の燃料噴射
ノズルの縦断面図、第１５図は同ノズルの先端部
の拡大断面図である。
３０Ａ，３０Ｂ……燃料噴射ノズル、３１……
ノズルボデイ、３２……針弁、３５……摺動孔、
３６ａ，６１ａ……シート部、３８……ヘツド部
、４２……燃料通路、４３……噴孔（噴口）、４
４……一端開口、６２……噴孔（噴口）、６５…
…環状溝、６６……連通孔、６７……一端開口、
６８……スリツト（噴口）。
The drawings from Fig. 1 to Fig. 13 show examples of this invention, and Fig. 1 is a longitudinal sectional view of the fuel injection nozzle according to the first invention, and Fig. 2 shows the nozzle in the closed state. The enlarged sectional views of the nozzle body and the tip of the needle valve shown in FIGS. 3 and 4 are enlarged sectional views corresponding to FIG. 2 showing the nozzle in an open state, respectively. Fig. 5 is a graph in which the horizontal axis is the cam angle and the vertical axis is the penetration force of the injected fuel. FIG. Also, the 10th
11 is an enlarged sectional view of the same nozzle corresponding to FIG. 2, FIG. 12 is an enlarged sectional view of the main part of the same nozzle, and FIG. 13 is a longitudinal sectional view of the fuel injection nozzle according to the second invention. 12 is an enlarged sectional view of a main part of another embodiment of the fuel injection nozzle according to the second invention, which corresponds to FIG. 12. FIG. 14 is a vertical sectional view of a conventional fuel injection nozzle, and FIG. 15 is an enlarged sectional view of the tip of the nozzle. 30A, 30B... fuel injection nozzle, 31...
Nozzle body, 32... needle valve, 35... sliding hole,
36a, 61a... Seat part, 38... Head part, 42... Fuel passage, 43... Nozzle hole (nozzle port), 4
4... One end opening, 62... Nozzle hole (spout), 65...
...Annular groove, 66...Communication hole, 67...One end opening,
68...Slit (spout).
Claims (1)
向へ摺動可能に挿通され、この針弁は、軸線方向
に沿つて内部に形成された燃料通路と、一端がノ
ズルボデイに対する摺動面に開口し他端が上記燃
料通路に連なる噴口とを具備し、ノズルボデイの
先端部には摺動孔よりも径方向外側に位置するシ
ート部が形成されていて、摺動孔から突き出た針
弁のヘツド部が上記シート部に着座することによ
り閉弁状態となり、針弁がその軸線方向先端側へ
移動してヘツド部がシート部から離間することに
より開弁状態となる燃料噴射ノズルにおいて、 閉弁状態では上記噴口の一端開口とノズルボデ
イの摺動孔の先端縁とが針弁の軸線方向に離間し
ており、開弁動作の途中で噴口の一端開口が摺動
孔から外方へ突き出るようにされていることを特
徴とする燃料噴射ノズル。 (2) ノズルボデイの摺動孔に針弁がその軸線方
向へ摺動可能に挿通され、ノズルボデイの先端部
には摺動孔よりも径方向外側に位置するシート部
が形成されていて、摺動孔から突き出た針弁のヘ
ツド部が上記シート部に着座することにより閉弁
状態になり、針弁が軸線方向先端側へ移動してヘ
ツド部がシート部から離間することにより開弁状
態になる燃料噴射ノズルにおいて、 上記針弁には、軸線方向に沿つて内部に形成さ
れた燃料通路と、ノズルボデイに対する摺動面に
形成された環状溝と、燃料通路と環状溝を結ぶ連
通孔とが設けられ、ノズルボデイの先端部には、
一端が上記摺動孔に開口し他端が針弁ヘツド部に
対する対向面でシート部よりも径方向内側にて開
口する噴口が設けられていて、而して、閉弁状態
では上記噴口の一端開口と針弁の環状溝とが針弁
の軸線方向に離間しており、開弁動作の途中で噴
口の一端開口と環状溝とが直結するようになつて
いることを特徴とする燃料噴射ノズル。[Claims for Utility Model Registration] (1) A needle valve is inserted into the sliding hole of the nozzle body so as to be slidable in the axial direction thereof, and the needle valve has a fuel passage formed inside along the axial direction; The nozzle body is provided with a nozzle opening at one end that opens onto the sliding surface with respect to the nozzle body and at the other end that is connected to the fuel passage, and at the tip of the nozzle body, a seat portion located radially outward from the sliding hole is formed, and the sliding When the head portion of the needle valve protruding from the moving hole seats on the seat portion, the valve becomes closed, and when the needle valve moves toward the distal end in the axial direction and the head portion separates from the seat portion, the valve becomes open. In the fuel injection nozzle, when the valve is closed, the opening at one end of the nozzle and the tip edge of the sliding hole in the nozzle body are separated from each other in the axial direction of the needle valve, and the opening at one end of the nozzle slides during the valve opening operation. A fuel injection nozzle, characterized in that it projects outward from a hole. (2) The needle valve is inserted into the sliding hole of the nozzle body so as to be slidable in the axial direction thereof, and the tip of the nozzle body is formed with a seat portion located radially outward from the sliding hole. When the head portion of the needle valve protruding from the hole seats on the seat portion, the valve becomes closed, and when the needle valve moves toward the tip in the axial direction and the head portion separates from the seat portion, the valve becomes open. In the fuel injection nozzle, the needle valve is provided with a fuel passage formed inside along the axial direction, an annular groove formed on a sliding surface with respect to the nozzle body, and a communication hole connecting the fuel passage and the annular groove. and the tip of the nozzle body is
A spout is provided, one end of which opens into the sliding hole and the other end of which opens radially inward from the seat on a surface facing the needle valve head, and when the valve is closed, one end of the nozzle is opened. A fuel injection nozzle characterized in that the opening and the annular groove of the needle valve are spaced apart in the axial direction of the needle valve, and the opening at one end of the nozzle and the annular groove are directly connected during the valve opening operation. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990072974U JP2521057Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990072974U JP2521057Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0432264U true JPH0432264U (en) | 1992-03-16 |
| JP2521057Y2 JP2521057Y2 (en) | 1996-12-25 |
Family
ID=31611393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990072974U Expired - Lifetime JP2521057Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521057Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63128269U (en) * | 1987-02-16 | 1988-08-22 | ||
| JPH02149767A (en) * | 1988-10-17 | 1990-06-08 | General Motors Corp <Gm> | fuel injection nozzle |
-
1990
- 1990-07-11 JP JP1990072974U patent/JP2521057Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63128269U (en) * | 1987-02-16 | 1988-08-22 | ||
| JPH02149767A (en) * | 1988-10-17 | 1990-06-08 | General Motors Corp <Gm> | fuel injection nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2521057Y2 (en) | 1996-12-25 |
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