JPH0292061U

JPH0292061U -

Info

Publication number: JPH0292061U
Application number: JP101089U
Authority: JP
Priority date: 1989-01-09
Filing date: 1989-01-09
Publication date: 1990-07-20

Description

[Brief explanation of the drawing]

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図は第二ジエツトに
おける空気流量と燃料流量による圧力損失との関
係を示す図、第３図は従来の多点燃料噴射装置の
一例を示す概略断面図である。１……燃料計量手段、１０……燃料噴射弁、１
１……補助バルブ、１３……一定流量供給手段、
１４……上流室、１５……下流室、１６……ダイ
アフラム、１７……第一ジエツト、１８……バル
ブ、２５……第二ジエツト。 Fig. 1 is a schematic sectional view showing an embodiment of the multi-point fuel injection device according to the present invention, Fig. 2 is a diagram showing the relationship between the air flow rate and the pressure loss due to the fuel flow rate in the second jet, and Fig. 3 is a conventional injector. 1 is a schematic cross-sectional view showing an example of a multi-point fuel injection device. 1...Fuel metering means, 10...Fuel injection valve, 1
1... Auxiliary valve, 13... Constant flow supply means,
14...Upstream chamber, 15...Downstream chamber, 16...Diaphragm, 17...First jet, 18...Valve, 25...Second jet.

Claims

[Scope of Claim for Utility Model Registration] (1) A heating charge is sent from a fuel supply source to an upstream chamber of a fuel injection valve arranged for each cylinder, and is connected to the upstream chamber by a diaphragm via a first jet. a first flow path that is sent to a partitioned downstream chamber and then returned to the fuel supply source via a second jet at a constant flow rate controlled by a single constant flow supply means; A second flow path which is branched and discharges fuel from the downstream chamber by a valve interlocked with the diaphragm, and a fuel flow rate corresponding to the air flow rate is metered and is connected to the first flow path downstream of the second jet. A multi-point fuel injection device comprising: a single fuel metering means for supplying fuel; the amount of fuel discharged from the downstream chamber is controlled in accordance with the flow rate of fuel supplied from the fuel metering means. (2) The fuel injection valve includes an upstream chamber and a downstream chamber having a discharge port partitioned by a diaphragm;
Claims for registration of a utility model, characterized in that the utility model comprises the valve connected to the diaphragm and capable of opening and closing the discharge port, and a spring that presses the diaphragm in the direction in which the valve opens.
The multi-point fuel injection device according to (1). (3) The discharge port for discharging fuel of the fuel injection valve includes a second diaphragm that partitions a chamber communicating with the discharge port, a second valve connected to the second diaphragm and capable of opening and closing the injection port; The multi-point fuel injection device according to claim (1) or (2) of the utility model registration, characterized in that an auxiliary valve consisting of a spring that presses the second diaphragm in the valve closing direction is connected. .