JPH0454973U - - Google Patents
Info
- Publication number
- JPH0454973U JPH0454973U JP9784390U JP9784390U JPH0454973U JP H0454973 U JPH0454973 U JP H0454973U JP 9784390 U JP9784390 U JP 9784390U JP 9784390 U JP9784390 U JP 9784390U JP H0454973 U JPH0454973 U JP H0454973U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- nozzle
- needle
- guide
- fuel injection
- 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
- 239000000446 fuel Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の実施例を示す燃料噴射ノズル
の縦断面図、第２図は同じく針弁要部の横断面図
である。また、第３図は従来例を示す燃料噴射ノ
ズルの縦断面図である。
１……針弁、２……ノズルボデイ、３，５……
ガイド、４……油溜り、６，７……大径部、８…
…溝、１０……噴孔、１１……先端部油溜り、１
２……通路、１３……第１のスプリング、１６…
…第２のスプリング。
FIG. 1 is a longitudinal cross-sectional view of a fuel injection nozzle showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part of the needle valve. Moreover, FIG. 3 is a longitudinal cross-sectional view of a fuel injection nozzle showing a conventional example. 1... Needle valve, 2... Nozzle body, 3, 5...
Guide, 4... Oil reservoir, 6, 7... Large diameter section, 8...
...Groove, 10...Nozzle hole, 11...Tip oil reservoir, 1
2... passage, 13... first spring, 16...
...Second spring.
Claims (1)
燃料を噴射する噴孔を放射状に形成し、これらの
噴孔を軸方向位置に応じて開閉する針弁をノズル
ボデイの内側の２箇所に形成したガイドで軸方向
変位自在に支持し、ノズルボデイと針弁の間を通
つて噴孔に導かれる高圧燃料に接して針弁を基端
方向へ付勢する受圧部を針弁に形成する一方、針
弁を先端方向へ付勢するスプリングを備えた燃料
噴射ノズルにおいて、先端側のガイドに支持され
る針弁外周部に、高圧燃料を噴孔に導く複数の溝
を等しい角度間隔で形成するとともに、この溝の
断面積を先端方向に向かつて縮小したことを特徴
とする燃料噴射ノズル。 This guide has nozzle holes that inject fuel radially formed at the tip of a cylindrical nozzle body with a sealed tip, and needle valves that open and close these nozzle holes depending on the axial position at two locations inside the nozzle body. The needle valve is supported such that it can be freely displaced in the axial direction. In a fuel injection nozzle equipped with a spring that biases the needle toward the tip, a plurality of grooves guiding high-pressure fuel to the nozzle hole are formed at equal angular intervals on the outer periphery of the needle valve supported by the guide on the tip side. A fuel injection nozzle characterized in that the cross-sectional area of the groove is reduced toward the tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9784390U JPH0454973U (en) | 1990-09-18 | 1990-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9784390U JPH0454973U (en) | 1990-09-18 | 1990-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0454973U true JPH0454973U (en) | 1992-05-12 |
Family
ID=31838565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9784390U Pending JPH0454973U (en) | 1990-09-18 | 1990-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454973U (en) |
-
1990
- 1990-09-18 JP JP9784390U patent/JPH0454973U/ja active Pending