JPS5971957U

JPS5971957U - fuel injection nozzle

Info

Publication number: JPS5971957U
Application number: JP16738582U
Authority: JP
Inventors: 三枝　省五
Original assignee: 日産自動車株式会社
Priority date: 1982-11-04
Filing date: 1982-11-04
Publication date: 1984-05-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のホール型燃料噴射ノズルを示す全体断面
図、第２，３図は燃料の噴射率特性を示すグラフ、第４
図は従来のポペット型燃料噴射ノズルを示す要部断面図
、第５〜９図はこの考案に係る燃料噴射ノズルの一実施
例を示す図であり、第５図はその要部断面図、第６図は
そのニードルバルブが噴孔を閉止している状態を示す部
分断面図、第７図は第６図の■−■矢視断面図、第８図
はそのニードルバルブのリフト初期の状態を示す部分断
面図、第９図はそのリフト最大時の状態を示す部分断面
図である。３２・・・・・・ノズルボディ、３３・・・・・・噴孔
、３４・・・・・・ニードルバルブ、４０・・・・・・
シート面、４１・・・・・・第１スロットル部、４２・
・・・・・第２スロットル部、４３・・・・・・先端傘
部、４４・・・・・・溝、４６・・・・・・シート部。第１図　　　　　　　　第４図　　　　　　　　第５図第８図第９図Figure 1 is an overall sectional view showing a conventional hole-type fuel injection nozzle, Figures 2 and 3 are graphs showing fuel injection rate characteristics, and Figure 4
Figure 5 is a cross-sectional view of the main part of a conventional poppet-type fuel injection nozzle, and Figures 5 to 9 are views showing an embodiment of the fuel injection nozzle according to this invention. Figure 6 is a partial sectional view showing the state where the needle valve closes the nozzle hole, Figure 7 is a sectional view taken along the ■-■ arrow in Figure 6, and Figure 8 shows the state of the needle valve at the initial stage of lift. FIG. 9 is a partial sectional view showing the state at maximum lift. 32... Nozzle body, 33... Nozzle hole, 34... Needle valve, 40...
Seat surface, 41...First throttle section, 42.
...Second throttle part, 43...Tip umbrella part, 44...Groove, 46...Seat part. Figure 1 Figure 4 Figure 5 Figure 8 Figure 9

Claims

[Scope of utility model registration request]

a seat surface that sits on the seat part of the nozzle hole of the nozzle body;
The needle valve is equipped with a first throttle part that is provided on the front end side of the seat surface to visually observe the initial fuel injection amount, and a tapered end umbrella part that protrudes from the nozzle hole. In a fuel injection nozzle that injects fuel by lifting, a second throttle portion having an axial length larger than a maximum lift amount of the needle valve is formed between the first throttle portion and the tip umbrella portion of the needle valve. A fuel injection nozzle characterized in that a groove extending in the axial direction is formed on the outer circumferential surface of the second throttle portion or the inner circumferential surface of the nozzle hole.