Patent ID: 8042751

Claim:
A nozzle system for an injector comprising: a casing including an inlet through which liquid flows and an injector outlet through which liquid is outwardly ejected; a swirler disposed inside the casing, the swirler including at least one swirl groove formed in the exterior circumference thereof through which the liquid passes and a swirl chamber formed between an end portion of the swirler and the injector outlet in the casing; and a needle slidably inserted into the swirler and for controlling liquid injection according to movement of the needle in the swirler whereby swirl torque is generated when the liquid flows into the swirl chamber through the swirl groove and swirls in the swirl chamber; wherein the swirl chamber has a conical shape that is defined by a lower flat end of the needle and the recess portion; and wherein the needle ascends and descends to open and close, respectively, the swirl groove.