Fuel injection valve

A fuel injector arranged in the intake pipe of a port injection type internal combustion engine, which the fuel is injected from the injection port in two directions, wherein when the flow rate distribution of the fuel spray which passes the section at a specific position of the downstream from said injection port is divided into a plurality of regions in a direction which extends from the inside of the fuel spray injected in two directions to the outside, the flow rate of each region in a direction perpendicular to said direction is integrated, and when the point inside of the fuel spray is assumed to be first point P1, the point outside of the fuel spray is assumed to be second point P2 and the point in the middle of said first point P1 and said second point P2 is assumed to be third point P3, the peak position of said flow rate integral value exists between said first point P1 and said third point P3 and the flow rate integral value decreases as the position gets away from the peak position.

A fuel injector arranged in the intake pipe of a port injection type internal combustion engine, which the fuel is injected from the injection port in two directions, wherein said injection port is terebrated in an axial direction inclined with respect to a center axis of said fuel injector, and when the center axis is assumed to be Z axis, the direction where the fuel spray of two directions extends is assumed to be X axis and the axis perpendicular to an X-Y plane is assumed to be Y axis, the tilt angle θ of said injection port becomes large and the diameter of said injection port becomes small as the distance S from a Y-Z plane increases.

A fuel injector arranged in the intake pipe of a port injection type internal combustion engine, which the fuel is injected from the injection port in two directions, wherein said injection port is terebrated in an axial direction inclined with respect to a center axis of said fuel injector, and when the center axis is assumed to be Z axis, the direction where the fuel spray of two directions extends is assumed to be X axis, and the axis perpendicular to an X-Y plane is assumed to be Y axis, the tilt angle θ of said injection port becomes large and the number of said injection port becomes small as the distance S from a Y-Z plane increases.