JPH0392565U

JPH0392565U -

Info

Publication number: JPH0392565U
Application number: JP214090U
Authority: JP
Priority date: 1990-01-12
Filing date: 1990-01-12
Publication date: 1991-09-20

Description

[Brief explanation of drawings]

第１図は本考案による多点式燃料噴射装置の一
実施例を示す要部断面図、第２図は先行技術によ
る多点式燃料噴射装置の概略断面図、第３図は燃
圧レギユレータのＰＱ特性を示す図である。４……高圧側燃圧レギユレータ、１０……燃料
噴射弁、１１……定圧室、１２……燃圧室、１３
……ダイヤフラム、α_１，α_２，α_３……第一ジ
エツト、β_１，β_２，β_３……第二ジエツト、γ
……第三ジエツト、δ……第四ジエツト、２０…
…ソレノイドバルブ、２２……定圧側燃圧レギユ
レータ、２８……定圧燃料通路、ａ……上流側ジ
エツト、ｂ……下流側ジエツト、３１……リター
ン燃料通路。 Fig. 1 is a sectional view of essential parts showing an embodiment of a multi-point fuel injection device according to the present invention, Fig. 2 is a schematic sectional view of a multi-point fuel injection device according to the prior art, and Fig. 3 is a PQ of a fuel pressure regulator. FIG. 3 is a diagram showing characteristics. 4... High pressure side fuel pressure regulator, 10... Fuel injection valve, 11... Constant pressure chamber, 12... Fuel pressure chamber, 13
... diaphragm, α ₁ , α ₂ , α ₃ ... first jet, β ₁ , β ₂ , β ₃ ... second jet, γ
...Third jet, δ...Fourth jet, 20...
... Solenoid valve, 22 ... Constant pressure side fuel pressure regulator, 28 ... Constant pressure fuel passage, a ... Upstream side jet, b ... Downstream side jet, 31 ... Return fuel passage.

Claims

[Scope of Claim for Utility Model Registration] A fuel injection valve that injects a required flow rate of fuel from a fuel chamber in conjunction with the displacement of a diaphragm that partitions a constant pressure chamber and a fuel chamber, and a fuel injection valve disposed on the upstream and downstream sides of the fuel chamber, respectively. A first jet and a second jet are provided for each cylinder, and the flow rate of fuel passing through a fuel return jet disposed downstream of each second jet is controlled in accordance with the flow rate of intake air. a solenoid valve, a high pressure side fuel pressure regulator that controls the fuel pressure on the upstream side of each of the first jets, a low pressure side fuel pressure regulator that controls the fuel pressure on the downstream side of the fuel return jet, and both fuel pressure regulators on the upstream side, respectively. In the multi-point fuel injection device, the fuel injection device is equipped with a constant pressure fuel passage communicating through a jet and a downstream jet and applying the fuel pressure to each of the constant pressure chambers, the return flow rate of the high pressure side fuel pressure regulator being transferred to the low pressure side fuel pressure regulator. A multi-point fuel injection device characterized by being configured to be introduced into the system.