JPH0323656U

JPH0323656U -

Info

Publication number: JPH0323656U
Application number: JP8423989U
Authority: JP
Priority date: 1989-07-18
Filing date: 1989-07-18
Publication date: 1991-03-12

Description

[Brief explanation of drawings]

第１〜４図は本考案の一実施例としてのエンジ
ンの燃料噴射装置を示すもので、第１図はそのエ
ンジンの要部断面図、第２図はそのインジエクタ
の側面を一部破断して示す図、第３図は第２図の
−矢視図、第４図はインジエクタからの燃料
の噴射状態を示す燃料噴射口前方の模式的な側面
図である。１……気筒、２……吸気マニホルド、３……排
気マニホルド、４……吸気弁、５……排気弁、６
……燃焼室、７……ピストン、８……インジエク
タ、９……バイパス通路、９ａ……バイパス通路
９の基端部、９ｂ……バイパス通路９の先端部、
１０……インジエクタ８の先端部、１１……外管
、１１ａ……アシストガス噴出口、１２……内管
、１２ａ……燃料噴射口、１３……空間、１５…
…開閉弁、１６……エンジン制御装置ＥＣＵ、１
７……エンジン温度センサ。 Figures 1 to 4 show a fuel injection system for an engine as an embodiment of the present invention. Figure 1 is a sectional view of the main parts of the engine, and Figure 2 is a partially cutaway side view of the injector. FIG. 3 is a view taken along the - arrow in FIG. 2, and FIG. 4 is a schematic side view of the front of the fuel injection port showing the state of fuel injection from the injector. 1...Cylinder, 2...Intake manifold, 3...Exhaust manifold, 4...Intake valve, 5...Exhaust valve, 6
... combustion chamber, 7 ... piston, 8 ... injector, 9 ... bypass passage, 9a ... base end of bypass passage 9, 9b ... tip end of bypass passage 9,
DESCRIPTION OF SYMBOLS 10...Tip of injector 8, 11...Outer pipe, 11a...Assist gas jetting port, 12...Inner pipe, 12a...Fuel injection port, 13...Space, 15...
...Opening/closing valve, 16...Engine control unit ECU, 1
7...Engine temperature sensor.

Claims

[Scope of utility model registration request]

In a fuel injection device equipped with an injector in the intake system of an engine, the tip of the injector has a double-tube structure consisting of an inner tube with a fuel injection port and an outer tube arranged with a space around the outer circumference of the inner tube. A bypass passage is formed and extends from the exhaust system of the engine into the space of the injector installed in the intake system, and is provided with a bypass passage that can appropriately supply the exhaust flow of the engine into the space. In order to promote atomization of the fuel ejected from the fuel injection port, an assist gas injection port is provided at an end of the space in the outer tube to eject the exhaust flow as assist gas. The engine's fuel injection system.