JPH0371166U

JPH0371166U -

Info

Publication number: JPH0371166U
Application number: JP13193989U
Authority: JP
Priority date: 1989-11-13
Filing date: 1989-11-13
Publication date: 1991-07-18

Description

[Brief explanation of the drawing]

第１図乃至第９図は本考案による燃料噴射装置
の燃料増量機構の第一実施例に関するものであり
、第１図は燃料噴射装置の概略断面図、第２図は
流入側電磁弁、消費側電磁弁及び増圧用電磁弁の
エンジン回転数とデユーテイ比の関係を示す図、
第３図は流入側電磁弁と消費側電磁弁の各開口面
積に応じた、燃圧Ｐ_ａに対する燃料流量Ｑ_ｃ，Ｑ
_ｄを示す図、第４図は分圧した場合としない場合
の吸入負圧Ｐ_ｍと燃圧Ｐ_ａとの関係を示す図、第
５図は吸入負圧Ｐ_ｍとエンジン回転数に応じた要
求燃料流量Ｑを示す図、第６図はエンジン回転数
に応じて開口Ｄ_ｅを流れる燃料流量Ｑ_ｅを示す図
、第７図は燃料流量Ｑ_ｅと燃圧Ｐ_５との関係を示
す図、第８図は吸入負圧Ｐ_ｍと増圧用電磁弁のデ
ユーテイ比に応じた燃圧Ｐ_ａを示す図、第９図は
吸入負圧Ｐ_ｍとエンジン回転数に応じた燃料噴射
量Ｑ_ｂの変化を示す図、第１０図は第一実施例の
変形例を示す要部断面図である。２，４５……燃圧レギユレータ、４……第一圧
力室、５……第一ダイアフラム、９，９′……ブ
リツジ流路、１０……ダイアフラム、１１……上
室、１２……下室、１４……第一ジエツト、１５
……第二ジエツト、１６……第三ジエツト、１７
……第四ジエツト、２２……第一燃料通路、２３
……流入側電磁弁、２４……第二燃料通路、２５
……消費側電磁弁、３４……第三燃料通路、３５
……ジエツト、３６……増圧用電磁弁、３７……
第二圧力室、３９……第二ダイアフラム、４０…
…レバー、４２……増圧スプリング。 1 to 9 relate to a first embodiment of the fuel increasing mechanism for a fuel injection device according to the present invention, FIG. 1 is a schematic sectional view of the fuel injection device, and FIG. A diagram showing the relationship between engine speed and duty ratio of the side solenoid valve and the pressure increase solenoid valve,
Figure 3 shows the fuel flow rate Q _c , Q with respect to the fuel pressure P _a according to the opening area of the inflow side solenoid valve and the consumption side solenoid valve.
_d , Figure 4 is a diagram showing the relationship between suction negative pressure P _m and fuel pressure P _a with and without partial pressure, and Figure 5 is a diagram showing the relationship between suction negative pressure P _m and engine speed. FIG. 6 is a diagram showing the fuel flow rate Q; FIG. 6 is a diagram showing the fuel flow rate _Qe flowing through the opening _De according to the engine speed; FIG. 7 is a diagram showing the relationship between the fuel flow rate _Qe and the fuel pressure _P5 ; Figure 8 shows the intake negative pressure P _m and the fuel pressure P _a depending on the duty ratio of the pressure increasing solenoid valve, and Figure 9 shows the change in the fuel injection amount Q _b depending on the intake negative pressure P _m and the engine speed. The figure shown in FIG. 10 is a sectional view of a main part showing a modification of the first embodiment. 2, 45... Fuel pressure regulator, 4... First pressure chamber, 5... First diaphragm, 9, 9'... Bridge channel, 10... Diaphragm, 11... Upper chamber, 12... Lower chamber, 14...First jet, 15
...Second jet, 16...Third jet, 17
...Fourth jet, 22...First fuel passage, 23
...Inflow side solenoid valve, 24...Second fuel passage, 25
...Consumption side solenoid valve, 34...Third fuel passage, 35
...Jet, 36...Solenoid valve for pressure increase, 37...
Second pressure chamber, 39... Second diaphragm, 40...
... Lever, 42 ... Pressure boosting spring.

Claims

[Claims for Utility Model Registration] A first chamber and a second chamber separated by a diaphragm, a valve capable of injecting fuel from the second chamber in conjunction with the diaphragm, and a first chamber and a second chamber separated by a diaphragm. first and third jets of the same diameter provided on the fuel inflow side of the chamber, and second and fourth jets of the same diameter provided on the fuel outflow side of the first and second chambers, respectively; one or more bridge passages consisting of one or more bridge passages; a fuel pressure regulator that changes the fuel pressure according to the engine speed; an inflow side electromagnetic valve that controls the opening area of a first fuel passage that can introduce fuel into the first chamber according to the engine rotational speed; and an inlet side solenoid valve that can cause fuel to flow out of the first chamber. a consuming means comprising a consuming solenoid valve that controls the opening area of the second fuel passage according to the engine speed; an interlocking member that transmits the elasticity of the elastic member to the first diaphragm of the fuel pressure regulator; The third fuel passage and the suction negative pressure between the pressure increasing solenoid valve that controls the opening area of the third fuel passage according to the engine speed and the pressure increasing solenoid valve and the jet disposed upstream thereof are ignited. a second diaphragm that partitions a second pressure chamber and transmits the differential pressure to an interlocking member so as to offset the elasticity of the elastic member; mechanism.