JPS60128968U

JPS60128968U - Diesel engine fuel supply system

Info

Publication number: JPS60128968U
Application number: JP1533484U
Authority: JP
Inventors: 川村　佳久; 量康赤坂; 宮島　智
Original assignee: 日産自動車株式会社
Priority date: 1984-02-08
Filing date: 1984-02-08
Publication date: 1985-08-29

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図は分配型燃料噴射ポンプの要部の断面図、第２図
ａ、　ｂ、　ｃはそれぞれ従来のデリバリ“　　バルブ
の作動状態を示す断面図、第３図ａはアングライヒスリ
ットを設けた従来のデリバリバルブの断面図、第３図す
は第３図ａのＩ−■断面図、第４図は２段カムによるプ
ランジャリフトの特性図、第５図は従来のデリバリバル
ブによる通路面積の特性図、第６図は従来のデリバリバ
ルブの吸戻し量の特性図、第７図は従来のデリバリバル
ブを使用した燃料供給装置の噴射率特性図、第８図′ａ
は本考案の第１実施例を示す要部の断面図、第８図すは
第８図ａの■−■断面図、第９図は本考案の第１実施例
による燃料通路面積の特性図、第１０図は同じく吸戻し
量の特性図、第１１図ａは本考案の第２実施例の要部の
断面図、第１１図すは第１１図ａの■−■断面図、第１
２図は第２実施例による燃料通路面積の特性図、第１−
３図は同じく吸戻し量の特性図、第１４図は本考案の第
３実施例の要部の断面図、第１５図は通常のカムを使用
した場合のプランジャリフトの特性図である。１０・・・・・・バレル、１１・・曲デリバリバルブ、
１′２９　１２　ａｔ　　１２　ｂ””ピストン、１３
，１３ａ、１３ｂｔ　　１３ｃ・・・・・・アングライ
ヒスリット。・１ンフ′回転＃ｌ肩Figure 1 is a cross-sectional view of the main parts of a distribution type fuel injection pump, Figures 2 a, b, and c are cross-sectional views showing the operating states of conventional delivery valves, and Figure 3 a is a cross-sectional view showing the operating state of a conventional delivery valve. A cross-sectional view of a conventional delivery valve, Fig. 3 is a cross-sectional view taken along I-■ in Fig. 3a, Fig. 4 is a characteristic diagram of plunger lift by a two-stage cam, and Fig. 5 is a diagram of the passage area of a conventional delivery valve. Characteristic diagram, Figure 6 is a characteristic diagram of suction and return amount of a conventional delivery valve, Figure 7 is an injection rate characteristic diagram of a fuel supply system using a conventional delivery valve, and Figure 8'a
8 is a sectional view of main parts showing the first embodiment of the present invention, FIG. 8 is a sectional view taken along the line ■-■ of FIG. 8a, and FIG. 9 is a characteristic diagram of the fuel passage area according to the first embodiment of the present invention. , FIG. 10 is a characteristic diagram of the amount of suction back, FIG. 11a is a sectional view of the main part of the second embodiment of the present invention, FIG.
Figure 2 is a characteristic diagram of the fuel passage area according to the second embodiment, and Figure 1-
FIG. 3 is a characteristic diagram of the amount of suction back, FIG. 14 is a sectional view of the main part of the third embodiment of the present invention, and FIG. 15 is a characteristic diagram of the plunger lift when a normal cam is used. 10... Barrel, 11... Curved delivery valve,
1'29 12 at 12 b"" piston, 13
, 13a, 13bt 13c... Angreichslit.・1 nf' rotation #l shoulder

Claims

[Scope of utility model registration request]

In a diesel engine in which a pump that sucks in and compresses fuel in synchronization with engine rotation and an injection valve installed in a combustion chamber of the engine are connected via an injection pipe, the diesel engine is interposed between the pump and the injection pipe. An Angleich slit whose cross-sectional area increases as the lift amount of the delivery valve increases is formed on at least one of the outer circumferential surface of the piston of the delivery valve or the inner circumferential surface of the barrel into which the piston is slidably inserted. A diesel engine fuel supply device characterized by: