JPS59110378U

JPS59110378U - fuel injection nozzle

Info

Publication number: JPS59110378U
Application number: JP535383U
Authority: JP
Inventors: 明信森山; 博通三輪; 斉藤　正昭
Original assignee: 日産自動車株式会社
Priority date: 1983-01-17
Filing date: 1983-01-17
Publication date: 1984-07-25

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１〜４図は従米の燃料噴射ノズルを示す図であり、第
１図はその概略断面図、第２図はその噴射流量とリフト
量との関係を示す図、第３図はそあ噴射圧力の時間的変
化を示す図、第４図はその噴射率の時間的変化を示す図
、第５〜１０図は本考案の燃料噴射ノズルの第１実施例
を示す図であり、第５図はその概略断面図、第６図はそ
の規制手段の拡大断面図、第７図はそのリフト許容室の
燃圧の時間的変化を示す図、第８図はそのニードル具ル
ブのリフト量の時間的変化を示す図、第９図はその噴射
圧力の時間的変化を示す図、第１０図はその噴射率の時
間的変化を示す図、第１１図は本考案の燃料噴射ノズル
の規制手段の拡大断面図である。１・・・・・・ノズルボディ、２・・・・・・噴孔、４
・・・・・・油溜り、５・・・・・・第１燃料通路、７
・・・・・・シート部、８・・・・・・ガイドホール、
９・・・・・・スプリング室、１０・・・・・・リター
ン通路、１１・・・・・・連通孔、１２・・・・・・ニ
ードルバルブ、１３・・・・・・フェイス部、１５・・
・・・・プレッシャステージ、１６・・・・・・ガイド
部、１７・・・・・・ジャーナル部、１９・・・・・・
リフト許容室、２０・・・・・・第２燃料通路、２２・
・・・・・プレッシャスプリング。Figures 1 to 4 are diagrams showing the fuel injection nozzle of Jumei. Figure 1 is a schematic cross-sectional view, Figure 2 is a diagram showing the relationship between the injection flow rate and lift amount, and Figure 3 is a diagram showing the soar injection nozzle. FIG. 4 is a diagram showing temporal changes in pressure; FIG. 4 is a diagram showing temporal changes in injection rate; FIGS. 5 to 10 are diagrams showing a first embodiment of the fuel injection nozzle of the present invention; 6 is an enlarged sectional view of the regulating means, FIG. 7 is a diagram showing the change in fuel pressure in the lift permissible chamber over time, and FIG. 8 is a diagram showing the lift amount of the needle lub over time. 9 is a diagram showing the temporal change in the injection pressure, FIG. 10 is a diagram showing the temporal change in the injection rate, and FIG. 11 is an enlarged view of the regulating means of the fuel injection nozzle of the present invention. FIG. 1... Nozzle body, 2... Nozzle hole, 4
... Oil sump, 5 ... First fuel passage, 7
... Seat part, 8 ... Guide hole,
9...Spring chamber, 10...Return passage, 11...Communication hole, 12...Needle valve, 13...Face part, 15...
...Pressure stage, 16...Guide part, 17...Journal part, 19...
Lift permissible chamber, 20...Second fuel passage, 22.
...Pressure spring.

Claims

[Scope of utility model registration request]

The nozzle body includes a nozzle body having a nozzle hole formed at its tip, and a needle valve movably housed in the nozzle body, and the nozzle body has an oil reservoir and a valve for introducing pressurized fuel into the oil reservoir. a second fuel passage that communicates with the oil reservoir and the injection hole through a seat portion; and a second fuel passage that communicates with the oil reservoir;
A guide hole for guiding the needle valve, a spring chamber communicating with the guide hole through the communication hole and having a compressed pressure spring, and a return passage for returning the fuel in the spring chamber to the fuel tank, A needle valve includes a face portion that can be seated on the seat portion, a pressure stage located in the oil reservoir, and a guide portion that slides in contact with the guide hole and defines a lift permissible chamber that communicates with a communication hole in the guide hole. and a journal portion that protrudes into the spring chamber through the communication hole and receives the urging force of the pressure spring, and the needle valve is urged by the pressure spring so that its face portion is seated on the seat portion. In the fuel injection nozzle, the needle valve is lifted by the fuel oil pressure introduced into the oil reservoir, and the fuel in the oil reservoir leaks into the lift allowable chamber from the sliding surface between the guide hole and the guide part. A fuel injection nozzle characterized in that a regulating means for regulating outflow of fuel from the lift permissible chamber to the spring chamber is provided between the journal portion of the needle valve and the journal portion of the needle valve.