JPH0432261U - - Google Patents
Info
- Publication number
- JPH0432261U JPH0432261U JP7297590U JP7297590U JPH0432261U JP H0432261 U JPH0432261 U JP H0432261U JP 7297590 U JP7297590 U JP 7297590U JP 7297590 U JP7297590 U JP 7297590U JP H0432261 U JPH0432261 U JP H0432261U
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- needle valve
- seat
- sliding hole
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図から第１０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実施例にお
け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１
０図は他の実施例における第２図に相当する拡大
断面図である。又、第１１図は従来の燃料噴射ノ
ズルの縦断面図、第１２図は同ノズルの先端部の
拡大断面図である。
３０……燃料噴射ノズル、３１……ノズルボデ
イ、３２……針弁、３６ａ……シート部、３７…
…摺動孔、３８……均圧室、３８ａ……側壁、３
９……噴孔、３９ａ……他端開口、４１……ヘツ
ド部、４５……第１燃料通路、４６……第２燃料
通路。
The drawings from Fig. 1 to Fig. 10 show an embodiment of this invention. Fig. 1 is a vertical cross-sectional view of the fuel injection nozzle in the first embodiment, 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 first
FIG. 0 is an enlarged sectional view corresponding to FIG. 2 in another embodiment. 11 is a longitudinal sectional view of a conventional fuel injection nozzle, and FIG. 12 is an enlarged sectional view of the tip of the nozzle. 30... Fuel injection nozzle, 31... Nozzle body, 32... Needle valve, 36a... Seat portion, 37...
...Sliding hole, 38...Pressure equalization chamber, 38a...Side wall, 3
9... Nozzle hole, 39a... Other end opening, 41... Head portion, 45... First fuel passage, 46... Second fuel passage.
Claims (1)
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
れた第１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第１燃料通路に連な
る第２燃料通路とが設けられ、ノズルボデイの先
端部には、摺動孔の内周面に形成された環状溝か
らなる均圧室と、一端がこの均圧室の側壁に開口
し他端が針弁ヘツド部に対する対向面であつてシ
ート部よりも径方向内側にて開口する複数の同一
内径の噴孔とが設けられ、上記均圧室の側壁の縦
断面形状が各噴孔の上記他端開口を中心とした同
一半径からなる円弧をなすように形成されている
ことを特徴とする燃料噴射ノズル。[Scope of Claim for Utility Model Registration] A needle valve is inserted into a sliding hole of a nozzle body so as to be slidable in its axial direction, and a seat portion located radially outward from the sliding hole is formed at the tip of the nozzle body. When the head of the needle valve protruding from the sliding hole seats on the seat, the valve is closed, and the needle valve moves toward the tip in the axial direction and the head separates from the seat. In the fuel injection nozzle that is in an open state, the needle valve includes a first fuel passage formed inside along the axial direction, and one end opening to a sliding surface with respect to the nozzle body and the other end opening to the first fuel passage. The tip of the nozzle body is provided with a pressure equalization chamber consisting of an annular groove formed on the inner circumferential surface of the sliding hole, and one end of which opens into the side wall of the pressure equalization chamber. A plurality of nozzle holes having the same inner diameter are provided whose end faces the needle valve head and opens radially inward from the seat, and the longitudinal cross-sectional shape of the side wall of the pressure equalizing chamber is the same as that of each nozzle hole. A fuel injection nozzle characterized in that the fuel injection nozzle is formed to form an arc having the same radius centered on the other end opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7297590U JPH085341Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7297590U JPH085341Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0432261U true JPH0432261U (en) | 1992-03-16 |
| JPH085341Y2 JPH085341Y2 (en) | 1996-02-14 |
Family
ID=31611395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7297590U Expired - Lifetime JPH085341Y2 (en) | 1990-07-11 | 1990-07-11 | Fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085341Y2 (en) |
-
1990
- 1990-07-11 JP JP7297590U patent/JPH085341Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH085341Y2 (en) | 1996-02-14 |
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