Vehicle fuel injector

A vehicle fuel injector provided for injecting a high-pressure vehicle fuel received from a fuel rail into a combustion chamber, the vehicle fuel injector comprising:

• a nozzle having a hollow shape;
• and
• a needle bar which vertically reciprocally moves on an inner circumferential surface of the nozzle, wherein rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed,
• wherein a guide protrusion is formed to protrude from the inner circumferential surface of the nozzle,
• a guide groove corresponding to the guide protrusion is provided on an outer circumferential surface of the needle bar, and
• the guide groove is concavely formed to be inclined in a downward direction and adjusts a rotation angle of the needle bar.

A vehicle fuel injector provided for injecting a high-pressure vehicle fuel received from a fuel rail into a combustion chamber, the vehicle fuel injector comprising:

• a nozzle which includes a plurality of discharge flow paths which are disposed to be spaced apart from each other in a circumferential direction and pass through the nozzle in a longitudinal direction, and outward flow paths formed on an inner circumferential surface of the nozzle, the nozzle having a hollow shape;
• a needle bar which is formed to pass through the inner circumferential surface of the nozzle and vertically reciprocally moves on the inner circumferential surface of the nozzle, wherein rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed;
• and
• a piezo actuator connected to an upper end of the needle bar to control movement of the needle bar.