JPH0383378U

JPH0383378U -

Info

Publication number: JPH0383378U
Application number: JP14465989U
Authority: JP
Priority date: 1989-12-15
Filing date: 1989-12-15
Publication date: 1991-08-23

Description

[Brief explanation of the drawing]

第１図は本考案による多点式燃料噴射装置の一
実施例の概略断面図、第２図は上記実施例におけ
るマニホールド圧力の変化とエンジン回転数の変
化による吐出量の変化を示すグラフである。１……燃料タンク、２……燃料ポンプ、３……
第一レギユレータ、４……第二レギユレータ、５
……第一流路、６_１，６_２，６_３……燃料噴射弁
、７……第二流路、８……ソレノイドバルブ、９
……第三流路、１０……電子制御ユニツト、１１
……バイパス、ａ……計量ジエツト、ｂ……リー
クジエツト、ｃ……制御ジエツト、ｄ_１，ｄ_２，
ｄ_３……流量ジエツト、ｅ_１，ｅ_２，ｅ_３……差
圧ジエツト、ｆ_１，ｆ_２，ｆ_３……分配ジエツト
。 FIG. 1 is a schematic sectional view of an embodiment of a multi-point fuel injection device according to the present invention, and FIG. 2 is a graph showing changes in discharge amount due to changes in manifold pressure and changes in engine speed in the above embodiment. . 1...Fuel tank, 2...Fuel pump, 3...
First regulator, 4...Second regulator, 5
...First flow path, 6 ₁ , 6 ₂ , 6 ₃ ... Fuel injection valve, 7 ... Second flow path, 8 ... Solenoid valve, 9
...Third flow path, 10...Electronic control unit, 11
... Bypass, a ... Metering jet, b ... Leak jet, c ... Control jet, d ₁ , d ₂ ,
_d3 ...Flow rate jet, _e1 , _e2 , _e3 ...Differential pressure jet, _f1 , _f2 , _f3 ...Distribution jet.

Claims

[Scope of Claim for Utility Model Registration] (1) Fuel from a fuel supply source is pressurized and sent out by a fuel pump, and the inlet and flow rate variation outlet of the first regulator and the flow rate fluctuation outlet where the regulated pressure changes depending on the manifold pressure and the second regulator. a first flow path in which the fuel is returned to the fuel supply source via a constant fuel pressure inlet and a variable flow rate outlet; and a constant return flow path in which the fuel sent out from the fuel pressure variable outlet of the first regulator is connected to a metering jet and a constant return amount provided for each cylinder. a second flow path that returns to the constant fuel pressure inlet of the second regulator via the fuel injection valve; and a second flow path branched from between the metering jet and the fuel injection valve, through which a portion of the fuel from the metering jet is returned to the constant fuel pressure inlet of the second regulator. a third flow path that returns to the constant fuel pressure inlet of the second regulator via a solenoid valve; and a fuel flow rate in the second flow path by changing the opening rate of the solenoid valve in accordance with at least the engine speed. and an electronic control unit that changes the flow rate of intake air, the multi-point fuel injection device is configured to discharge an amount of fuel from the fuel injection valve according to the intake air flow rate. (2) The multi-point fuel injection device according to claim (1), further comprising a bypass that communicates the upstream side of the metering jet and the downstream side of the solenoid valve.