Patent ID: 8322635

Claim:
An injector apparatus for an engine, comprising: an injector body; an actuator mounted in the injector body; a rotary rod rotatably received in the injector body and selectively rotated by the actuator, wherein a fuel groove is formed on an outer surface of the rotary rod along a longitudinal direction thereof; and a nozzle hole formed at a nozzle of the injector body to selectively communicate with the fuel groove in accordance with rotation of the rotary rod, wherein the rotary rod slidably contacts with the nozzle in the injector body, wherein a plurality of the nozzle holes is circumferentially disposed on the nozzle in a rotational direction of the rotary rod, wherein two adjacent nozzle holes among the plurality of the nozzle holes have different diameters at an inlet and an outlet respectively, and wherein one of the two adjacent nozzle holes has a diameter larger at the inlet than the outlet thereof, and the other has a diameter smaller at the inlet than the outlet thereof.