JPH0424664U

JPH0424664U -

Info

Publication number: JPH0424664U
Application number: JP6456690U
Authority: JP
Priority date: 1990-06-19
Filing date: 1990-06-19
Publication date: 1992-02-27

Description

[Brief explanation of drawings]

第１図は本考案による燃料噴射装置の一実施例
を示す要部断面図、第２図は第二燃圧レギユレー
タにおけるインテークマニホールド圧力と燃圧Ｐ
_２の関係を示す図、第３図は第二固定ジエツトに
おける前後差圧Ｐ_３−Ｐ_２と燃料流量Ｑ_６の関係
を示す図、第４図はインテークマニホールド圧力
とエンジン回転数に応じた燃料流量Ｑ_５の変化を
示す図、第５図はインテークマニホールド圧力と
エンジン回転数に応じた燃料流量Ｑ_４，Ｑ_５及び
Ｑ_ｏｕｔの関係を示す図である。２……第一燃圧レギユレータ、６……第二燃圧
レギユレータ、１０……燃料噴射弁、１１……第
一室、１２……第二室、１３……ダイアフラム、
１４……バルブ、１８……第一固定ジエツト、１
９……第一ソレノイドバルブ、２３……第二固定
ジエツト、２４……第二ソレノイドバルブ。 Fig. 1 is a sectional view of essential parts showing an embodiment of the fuel injection device according to the present invention, and Fig. 2 shows the intake manifold pressure and fuel pressure P in the second fuel pressure regulator.
Figure ₃ is a diagram showing the relationship between front and rear differential pressure _P3 - _P2 and fuel flow rate _Q6 at the second fixed jet, Figure 4 is a diagram showing the relationship between intake manifold pressure and engine speed. FIG. ₅ is a diagram showing the relationship between the fuel flow rates Q ₄ , Q ₅ and Q _out according to the intake manifold pressure and the engine speed. 2...First fuel pressure regulator, 6...Second fuel pressure regulator, 10...Fuel injection valve, 11...First chamber, 12...Second chamber, 13...Diaphragm,
14... Valve, 18... First fixed jet, 1
9...First solenoid valve, 23...Second fixed jet, 24...Second solenoid valve.

Claims

[Scope of utility model registration request]

a first fuel pressure regulator that controls fuel pressure to a constant level; a second fuel pressure regulator that sets a fuel pressure lower than the constant fuel pressure and in accordance with intake manifold pressure; and a first chamber to which the fuel pressure of the first fuel pressure regulator is applied. a fuel injection valve in which a second chamber having a discharge port is partitioned by a diaphragm that interlocks a valve for opening and closing the discharge port, and the differential pressure between the two chambers is controlled to be constant; the first fuel pressure regulator and the second chamber; A first fixed jet and a first electromagnetic opening area adjusting means for controlling the opening area according to the engine rotation speed, and a second fixed jet and the engine rotation speed that communicate the second chamber and the second fuel pressure regulator, respectively. a second electromagnetic opening area adjusting means for controlling the opening area according to the fuel injection device.