JPS6015972U

JPS6015972U - Fuel injection valve injection rate control device

Info

Publication number: JPS6015972U
Application number: JP10790083U
Authority: JP
Inventors: 嶋岡　義二; 川村　佳久
Original assignee: 日産自動車株式会社
Priority date: 1983-07-12
Filing date: 1983-07-12
Publication date: 1985-02-02

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図は従来装置の断面図である。第２図は本考案の実
施例を示す要部断面図、第３図は燃料圧力検出手段など
を示す構成図、第４図は燃料噴射率の特性図、第５図ａ
、　　ｂは燃料噴射量を一定としたときの噴射率とＮＯ
ｘの発生量との関係を示す説明図、第６図はアクセル開
度と噴射開口面積の関係を回転数にもとづいて示す説明
図、第７図は同じく燃料噴射期間を一定としたときのア
クセル開度と噴射量との関係を示す説明図である。１・・・ノズルナツト、３・・・ノズル、５・・・シー
ト部、６・・・噴射口、７．１４・・・燃料通路、８・
・・針弁、９・・・テーパ部、１５・・・ばね座、１７
・・・コイルばね、２１・・印ツド、２２・・・カム室
、２３・・・回転軸、２４・・・カム、２５・・・レバ
ー、２６−・・ロッド、２７・・・可変レバー、２８・
・・燃料圧力検出手段、２９・・・アクセル開度ド、３
０・・・シリンダ、３１・・・ピストン、３２・・・駆
動軸、３６・・・長溝。FIG. 1 is a sectional view of a conventional device. Fig. 2 is a sectional view of the main parts showing an embodiment of the present invention, Fig. 3 is a configuration diagram showing the fuel pressure detection means, etc., Fig. 4 is a characteristic diagram of fuel injection rate, Fig. 5 a
, b is the injection rate and NO when the fuel injection amount is constant
Fig. 6 is an explanatory diagram showing the relationship between the accelerator opening and the injection opening area based on the rotation speed, and Fig. 7 is an explanatory diagram showing the relationship between the accelerator opening and the injection opening area based on the rotation speed, and Fig. 7 is the accelerator when the fuel injection period is constant. FIG. 3 is an explanatory diagram showing the relationship between the opening degree and the injection amount. DESCRIPTION OF SYMBOLS 1... Nozzle nut, 3... Nozzle, 5... Seat part, 6... Injection port, 7.14... Fuel passage, 8...
...needle valve, 9...tapered part, 15...spring seat, 17
...Coil spring, 21...Marked, 22...Cam chamber, 23...Rotating shaft, 24...Cam, 25...Lever, 26-...Rod, 27...Variable lever , 28・
...Fuel pressure detection means, 29...Accelerator opening degree, 3
0...Cylinder, 31...Piston, 32...Drive shaft, 36...Long groove.

Claims

[Scope of utility model registration request]

It is equipped with a needle valve that opens and closes the fuel injection port, a spring that urges the needle valve to seat on the needle valve seat, and a fuel passage that guides the fuel pressure supplied from the fuel injection pump in the direction in which the needle valve opens. A fuel injection valve is equipped with a cam that rotates according to the operating state of the engine, and a regulating means that follows the cam to vary the maximum lift of the needle valve, and increases or decreases the area of the injection port according to the operating state of the engine. An injection rate control device for a fuel injection valve, characterized in that: