JPS5990075U

JPS5990075U - Fuel injection detection device for fuel injection engines

Info

Publication number: JPS5990075U
Application number: JP18585982U
Authority: JP
Inventors: 初雄永石; 川村　佳久; 嶋岡　義二
Original assignee: 日産自動車株式会社
Priority date: 1982-12-08
Filing date: 1982-12-08
Publication date: 1984-06-18

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 drawings]

第１図はこの考案を適用した燃料噴射ノズルの断面図、
第２図はその熱線式流速センサの回路図、第３図は燃料
噴射時の噴射圧力、針弁リフト量および出力信号の関係
を示すグラフ、第４図はこの考案の異なる実施例を示す
構成説明図である。１．１′・・・燃料噴射ノズル、５・・・高圧燃料入口
、ｑ・・・リターン燃料出口、９・・・針弁、１０・・
・ブツシュロッド、１１・・・ノズルスプリング、１２
・・・油溜り、１６・・・ノズルスプリング収納室、１
７・・・燃料リターン通路、１９．１９’・・・熱線式
流速センサ、２０・・・検出部、２１・・・検出回路、
２４・・・熱線、３１・・・燃料リターン通路。Figure 1 is a cross-sectional view of a fuel injection nozzle to which this invention is applied.
Figure 2 is a circuit diagram of the hot wire flow rate sensor, Figure 3 is a graph showing the relationship between injection pressure, needle valve lift amount and output signal during fuel injection, and Figure 4 is a configuration showing a different embodiment of this invention. It is an explanatory diagram. 1.1'... Fuel injection nozzle, 5... High pressure fuel inlet, q... Return fuel outlet, 9... Needle valve, 10...
・Butsch rod, 11... Nozzle spring, 12
...Oil reservoir, 16...Nozzle spring storage chamber, 1
7...Fuel return passage, 19.19'...Hot wire flow rate sensor, 20...Detection section, 21...Detection circuit,
24...Hot wire, 31...Fuel return passage.

Claims

[Scope of utility model registration request]

a needle valve that is biased in a valve closing direction by a nozzle spring and opened by fuel pressure fed from an injection pump;
In a fuel injection type engine using a fuel injection nozzle, the fuel injection nozzle is connected to a fuel return passage for discharging surplus fuel and is provided with a nozzle spring storage chamber whose volume changes in response to opening and closing of a needle valve. A fuel injection detection device for a fuel injection type engine, characterized in that a fuel flow sensor is provided in an internal or external fuel return passage, and the operation of the needle valve is detected from the output of the sensor.