Patent ID: 7770556
Filing Date: 2010-08-10
Classification: F02B,F02M,Y02T

Abstract:
1. A fuel injector for an in-cylinder gasoline injection type internal combustion engine, said fuel injector comprising: a valve element that is movable in an axial movement direction thereof; a valve seat member having a valve scat tapered surface that is inclined relative to said axial movement direction of the valve element, said tapered surface including a seat portion for the valve element; and a plurality of fuel injection-nozzle holes provided in seat portion; wherein the nozzle holes are formed along respective inclined axes, each of said inclined axes having an inclination angle relative to the axial movement direction of the valve element; outlets of the nozzle holes are provided on an outside face of the valve seat member; inlets of the nozzle holes are provided on the tapered surface at an inside of the valve seat member to a center of the valve seat member with respect to the seat portion; one of the nozzle holes has an inclined axis with an inclination angle that is smallest among the inclination angles of all of the inclined axes; and the injector is mounted to the engine with the axis of the nozzle hole having the smallest inclination angle being directed toward a central area of a crown face of a piston in the engine.