JPH0465960U

JPH0465960U -

Info

Publication number: JPH0465960U
Application number: JP10524590U
Authority: JP
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1992-06-09
Anticipated expiration: 2005-10-08
Also published as: JP2520794Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第一実施例に係るデイーゼル
機関の燃料噴射装置の概略断面図、第２図はその
電磁弁の動作説明図、第３図は燃料噴射装置の動
作説明図、第４図、第５図は本考案の他の実施例
に係るデイーゼル機関の燃料噴射装置の概略断面
図、第６図は従来のデイーゼル機関の燃料噴射装
置の概略断面図、第７図はその動作説明図である
。図面中、２，６２，７２はプランジヤバレル、
３，６３，７１はプランジヤ、５，６４，７５は
圧力室、８は針弁、９は液溜室、１２は噴射ノズ
ル、１４は第一室、１５は第二室、１６は通路、
３１は装置本体、３２は電磁弁、３３はポペツト
弁、３５はプツシユロツド、３７はリターンスプ
リング、３８は主コイル、３９は副コイルである
。 FIG. 1 is a schematic sectional view of a fuel injection device for a diesel engine according to the first embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the solenoid valve, FIG. 5 is a schematic sectional view of a fuel injection device for a diesel engine according to another embodiment of the present invention, FIG. 6 is a schematic sectional view of a conventional fuel injection device for a diesel engine, and FIG. 7 is an explanation of its operation. It is a diagram. In the drawing, 2, 62, 72 are plunger barrels,
3, 63, 71 are plungers, 5, 64, 75 are pressure chambers, 8 is a needle valve, 9 is a liquid reservoir chamber, 12 is an injection nozzle, 14 is a first chamber, 15 is a second chamber, 16 is a passage,
31 is the main body of the device, 32 is a solenoid valve, 33 is a poppet valve, 35 is a push rod, 37 is a return spring, 38 is a main coil, and 39 is a sub coil.

Claims

[Scope of utility model registration request]

In a fuel injection device for a diesel engine in which a plunger reciprocates within a plunger barrel to change the pressure in a reservoir chamber of an injection nozzle to open and close a nozzle valve, a first chamber communicating with the reservoir chamber side;
a second chamber communicating with the open side, a passage communicating the first chamber and the second chamber, an on-off valve for opening and closing the passage, and operating the on-off valve to fully close the passage. a main drive source that brings the first chamber and the second chamber into a non-communicating state and enables pressurization in the liquid reservoir chamber; and a main drive source that operates the on-off valve when the on-off valve is operated by the main drive source. an auxiliary drive source that causes the passage to be in a half-open state; and a sub-drive source that operates the on-off valve to fully open the passage when the on-off valve is not operated by the main drive source and the auxiliary drive source. A fuel injection device for a diesel engine, comprising: a third drive source that fully opens the passageway, communicates the first chamber and the second chamber, and makes it impossible to pressurize the inside of the liquid reservoir chamber.