JPS59165965U - electromagnetic fuel injector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

The figures show an embodiment of the electromagnetic fuel injector according to this invention, FIG. 1 is a longitudinal sectional view of the embodiment, FIG. 2 is an enlarged view of the main parts,
FIG. 3 is an enlarged view of the main parts of another embodiment, and FIGS.
The figure is an explanatory diagram of the operation of this invention. 3...Fuel injection port, 3a...Valve seat, 4...Guide hole, 11...Opening/closing valve, 12...Sliding part, 12b
...Fuel outlet, 12C...Parallel part, 12d...Linear taper part, 12e...Curved surface, 13...Valve part,
f...Aperture part. 'Correction 1984. 7.23 The scope of claims for utility model registration is amended as follows. O Utility Model Registration Claims A valve housing having a fuel injection port and a valve seat at the tip and a guide hole in the shaft center, and a cylindrical slide slidably inserted into the guide hole and having a fuel passage inside. an on-off valve having a generally spherical valve element integrally fixed to the tip of the on-off valve, and an armature connected to the rear end of the on-off valve;
It consists of a fixed iron core facing the rear end surface of the armature, an electromagnetic coil attached around the fixed iron core, and a magnetic case that connects the valve housing and the fixed iron core, and is normally biased by a compression spring. The electromagnetic fuel injector for an internal combustion engine opens and injects heated fuel while the on-off valve is in a closed state and the electromagnetic coil receives a signal, the electromagnetic fuel injector for an internal combustion engine injecting heated fuel. The fuel passage from the fuel outlet provided in the valve seat to the valve seat is provided with an annular constriction portion composed of an outer surface of the slide portion and an inner surface of the housing, and the outer surface of the slide portion constituting the constriction portion faces toward the tip. An electromagnetic fuel injector characterized in that the annular cross section of the constriction section is tapered toward the downstream side.

Claims (1)

[Scope of utility model registration request] A valve housing having a fuel injection port and a valve seat at the tip and a guide hole in the shaft center, and a cylindrical slide part that is slidably inserted into the guide hole and has a fuel passage inside. an on-off valve having a fixed substantially spherical valve element; an armature connected to a rear end of the on-off valve;
It consists of a fixed core that faces the rear end surface of the armature and has a fuel passage in its axial center, an electromagnetic coil attached around the fixed core, and a magnetic case that connects the valve housing and the fixed core. , an electromagnetic fuel injection system for an internal combustion engine in which the on-off valve is normally closed by being biased by a compression spring, and the on-off valve opens and injects pressurized fuel while receiving a signal from a prepacked electromagnetic coil; The fuel passage from the fuel outlet provided in front of the slide part to the valve seat is provided with an annular constriction part constituted by an outer surface of the slide part and an inner surface of the housing, and the constriction part is configured. An electromagnetic fuel injector characterized in that the outer surface of the sliding portion is formed to be tapered toward the tip, so that the annular cross section of the throttle portion becomes wider toward the downstream side.