JPH046567U

JPH046567U -

Info

Publication number: JPH046567U
Application number: JP4312390U
Authority: JP
Priority date: 1990-04-24
Filing date: 1990-04-24
Publication date: 1992-01-21

Description

[Brief explanation of the drawing]

第１図Ａ，Ｂはこの考案の一実施例を示すもの
で、第１図Ａはその縦断面図、第１図Ｂは第１図
ＡのＢ−Ｂ矢視断面図、第２図Ａ，Ｂ，Ｃはそれ
ぞれカムアングルに対する燃料の噴射圧、ソレノ
イドに通電する電流および噴射率の特性を示すも
ので、第２図Ａはこの考案に係る燃料噴射装置の
特性図、第２図Ｂはスピル室を大気圧に開放した
燃料噴射装置の特性図、第２図Ｃはスピル室を開
閉弁を介して燃料の低圧側に接続した燃料噴射装
置に特性図である。２……プランジヤ、５……燃料加圧室、１３…
…スピル室、１８……電磁弁、１９……弁体、２
１……弁座、２７……ストツパ部材（ストツパ部
）、２７ａ……スピル孔、２８……第１の通路、
２９……第２の通路、３１……開閉弁。 Figures 1A and 1B show an embodiment of this invention; Figure 1A is a longitudinal sectional view thereof, Figure 1B is a sectional view taken along the line B-B of Figure 1A, and Figure 2A is a cross-sectional view taken along the line B-B of Figure 1A. , B, and C show the characteristics of the fuel injection pressure, current energized to the solenoid, and injection rate with respect to the cam angle, respectively. Figure 2A is a characteristic diagram of the fuel injection device according to this invention, and Figure 2B is a characteristic diagram of the fuel injection device according to this invention. FIG. 2C is a characteristic diagram of a fuel injection device in which the spill chamber is opened to atmospheric pressure, and FIG. 2...Plunger, 5...Fuel pressurization chamber, 13...
... Spill chamber, 18 ... Solenoid valve, 19 ... Valve body, 2
1... Valve seat, 27... Stopper member (stopper part), 27a... Spill hole, 28... First passage,
29...Second passage, 31...Opening/closing valve.

Claims

[Scope of utility model registration request]

A fuel pressurizing chamber in which internal fuel is pressurized by a plunger, a spill chamber to which fuel is supplied, and one end protruding into the spill chamber is seated on a valve seat formed in the spill chamber. the fuel pressurization chamber and the spill chamber, and the fuel pressurization chamber and the spill chamber are communicated by lifting the valve seat until it hits a stopper formed in the spill chamber. In the fuel injection device equipped with a solenoid valve having a valve body, the stopper portion includes:
forming a spill hole, one end of which is open to atmospheric pressure, the other end of which is opened to an end face of the stopper portion against which the valve element abuts, and whose opening is shielded by the valve element which abuts the stopper;
The spill chamber is connected to the low pressure side of the fuel via an on-off valve that is opened by the pressure when the pressure inside the spill chamber becomes higher than the pressure of the fuel supplied to the spill chamber. Fuel injection device.