JPS628370U

JPS628370U -

Info

Publication number: JPS628370U
Application number: JP9440585U
Authority: JP
Priority date: 1985-06-24
Filing date: 1985-06-24
Publication date: 1987-01-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す燃料噴射弁の
要部拡大図、第２図及び第３図は同上の作用を説
明するための図、第４図は燃料噴射弁の従来例を
示す断面図、第５図は第４図のＡ部拡大図、第６
図は同上の作用を説明するための図、第７図は吸
気弁２弁式内燃機関の平面図である。１１……針弁、１２ｂ……先窄まり部、１２ｃ
……末拡がり部。 Fig. 1 is an enlarged view of the main parts of a fuel injection valve showing an embodiment of the present invention, Figs. 2 and 3 are views for explaining the same operation, and Fig. 4 shows a conventional example of the fuel injection valve. 5 is an enlarged view of section A in FIG. 4, and FIG.
The figure is a diagram for explaining the same operation as above, and FIG. 7 is a plan view of a two-valve intake valve type internal combustion engine. 11... Needle valve, 12b... Tapered portion, 12c
... end expansion part.

補正昭６１．８．７実用新案登録請求の範囲を次のように補正する
。Amendment August 7, 1981 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】気筒毎に２つの吸気弁及び吸気弁に至る２つの
吸気ポートを備えると共に、一方の吸気ポートに
機関運転条件に応じて開閉される開閉弁を備え、
かつ、燃料を主として他方の吸気ポートに供給す
る燃料供給手段であつて、ノズルボデイとの間に
噴孔を形成する針弁の噴孔外方に延びる先端部に
、針弁の先端に向かうに伴なつて所定角度θ_１で
窄まる略円錐状の先窄まり部と該先窄まり部の先
端部に当該先窄まり部と略同軸状に取付けられ針
弁の先端に向かうに伴つて所定角度θ_２で拡がる
末拡がり部とを備える火花点火式内燃機関の燃料
噴射弁において、前記末拡がり部の所定角度θ_２を前記先窄まり部の所定角度θ_１より大きく形成
したことを特徴とする火花点火式内燃機関の燃料
噴射弁。[Claims for Utility Model Registration] Each cylinder is equipped with two intake valves and two intake ports leading to the intake valve, and one intake port is equipped with an on-off valve that opens and closes depending on engine operating conditions,
The fuel supply means mainly supplies fuel to the other intake port , and a needle valve that forms a nozzle hole between the nozzle body and the nozzle hole extends outwardly from the nozzle hole. A substantially conical tapered portion that narrows at a predetermined angle θ ₁ and a predetermined angle attached to the tip of the tapered portion approximately coaxially with the tapered portion and a predetermined angle as it moves toward the tip of the needle valve. In a fuel injection valve for a spark-ignited internal combustion engine, the fuel injection valve has a diverging portion that widens at an angle _{of θ 2} _; A fuel injection valve for a spark ignition internal combustion engine, characterized in that the angle θ of the tapered portion is larger than a predetermined angle _θ1 .

Claims

[Scope of utility model registration request]

A needle valve that injects fuel into the intake passage of an engine and forms a nozzle hole between the needle valve and the nozzle body. A substantially conical tapered portion that narrows at θ ₁ and a predetermined angle θ 2 that is attached to the tip of the tapered portion substantially coaxially with the tapered portion and extends at a predetermined angle θ ₂ toward the tip of the needle valve. In a fuel injection valve for a spark-ignited internal combustion engine, the fuel injection valve has a widening end portion.
A fuel injection valve for a spark ignition internal combustion engine, characterized in that the predetermined angle θ ₂ of the diverging portion is larger than the predetermined angle θ ₁ of the tapering portion.