JPH0292062U

JPH0292062U -

Info

Publication number: JPH0292062U
Application number: JP101189U
Authority: JP
Priority date: 1989-01-09
Filing date: 1989-01-09
Publication date: 1990-07-20

Description

[Brief explanation of drawings]

第１図は本考案による多点燃料噴射装置の一実
施例を示す概略断面図、第２図は第一ジエツトに
おける圧力損失と空気流量の関係を示す図、第３
図は第二実施例を示す概略断面図、第４図は従来
装置の概略断面図である。１……燃料計量手段、１０……第一ジエツト、
１１……第一の一定流量供給手段、１２……燃料
噴射弁、１４……上流室、１５……下流室、１６
……ダイアフラム、１７……バルブ、１９……第
二ジエツト、２０……第三ジエツト、２１……第
二の一定流量供給手段、２３……第四ジエツト。 Fig. 1 is a schematic sectional view showing an embodiment of a multi-point fuel injection device according to the present invention, Fig. 2 is a diagram showing the relationship between pressure loss and air flow rate in the first jet, and Fig. 3 is a diagram showing the relationship between pressure loss and air flow rate in the first jet.
The figure is a schematic sectional view showing the second embodiment, and FIG. 4 is a schematic sectional view of the conventional device. 1... fuel metering means, 10... first jet,
11...First constant flow rate supply means, 12...Fuel injection valve, 14...Upstream chamber, 15...Downstream chamber, 16
... diaphragm, 17 ... valve, 19 ... second jet, 20 ... third jet, 21 ... second constant flow supply means, 23 ... fourth jet.

Claims

[Scope of claim for utility model registration] (1) Passing from the fuel supply source through the first jet,
a first flow path through which a constant flow rate of fuel is returned to the fuel supply source by a first constant flow supply means; a first flow path branching from the first flow path between the first jet and the first constant flow supply means; a second flow path through which a flow rate of heating material corresponding to the air flow rate is returned to the fuel supply source by a means; and an upstream flow path provided for each cylinder and to which the fuel pressure of the flow path downstream of the first jet is applied. a fuel injection valve whose chamber is separated from the downstream chamber by a diaphragm that interlocks the valve; and a fuel injection valve which is branched from the first flow path upstream of the first jet and is connected to each of the downstream chambers via a second jet, respectively. a third flow path in which a constant fuel flow is introduced into the single second constant flow supply means through a third jet and returned to the fuel supply source, and A multi-point fuel injection device, wherein a fuel flow rate is discharged from a downstream chamber of each of the fuel injection valves. (2) In the first flow path, a fourth jet is provided in place of the first constant flow rate supply means, and a constant flow rate of fuel that has passed through the fourth jet flows into the second constant flow rate supply means. A multi-point fuel injection device according to claim (1) of the utility model registration, characterized in that: (3) The fuel injection valve includes an upstream chamber partitioned by a diaphragm and a downstream chamber having a discharge port, the valve connected to the diaphragm and capable of opening and closing the discharge port, and the valve connected to the diaphragm to open and close the discharge port. The multi-point fuel injection device according to claim (1) or (2) of the utility model registration, characterized in that the multi-point fuel injection device comprises a spring that presses toward the valve.