초록 ▼

A fuel injection valve includes an injector body having a fuel injection hole and an adapter having a fuel collision surface, two air injection holes and two injected fuel paths. The fuel injected from the fuel injection hole flows in a slug-like pattern and collides with the fuel collision surface

A fuel injection valve includes an injector body having a fuel injection hole and an adapter having a fuel collision surface, two air injection holes and two injected fuel paths. The fuel injected from the fuel injection hole flows in a slug-like pattern and collides with the fuel collision surface where the fuel is atomized a first time. Then, the fuel flows in a direction away from an axis of the adapter in a membrane-like pattern getting thinner in thickness to be finally broken to pieces, that is, to be atomized a second time. The air injected from the air injection holes collides with the membrane-like pattern of fuel to be atomized a third time before the fuel goes out of the injected fuel paths.

대표청구항 ▼

A fuel injection value with an air assist adapter for internal combustion engine comprising: an injector body having a fuel injection hole for injecting fuel in a slug-like pattern; and an adapter coaxially coupled to the injector body, the adapter including: a recessed concave portion for defining

A fuel injection value with an air assist adapter for internal combustion engine comprising: an injector body having a fuel injection hole for injecting fuel in a slug-like pattern; and an adapter coaxially coupled to the injector body, the adapter including: a recessed concave portion for defining a dead volume portion therein such that fuel injected from the fuel injection hole flows in a slug-like pattern from the fuel injection hole into the dead volume portion; a fuel collision surface, spaced from and axially opposite to the fuel injection hole, for allowing fuel flowing from the fuel injection hole toward the fuel collision surface to collide with the fuel collision surface to thereby change the fuel flow direction from a first direction toward the fuel collision surface to a second direction away from an axis of the adapter and to change the fuel flow pattern from the slug-like pattern to a membrane-like pattern; means, formed in the adapter, for injecting air against the membrane-like pattern of fuel from above the membrane-like pattern of fuel in a direction opposite the second direction to thereby assist in atomization of the fuel, the air injecting means comprising two air injection holes; and two injected fuel paths, formed on sides of the fuel collision surface, for conducting the atomized fuel and the injected air into an intake port of an engine, each fuel path having one end lying in a plane including the fuel collision surface.