Patent ID: 6676040
Filing Date: 2004-01-13
Classification: F02M

Abstract:
A GDI injector of a vehicle engine including a nozzle body having an opening along its longitudinal axis, a cylindrically-shaped needle valve being centrally located within the opening of the nozzle body, a fuel inlet member, and a swirl generator, wherein the swirl generator comprises:an inner case having a cylindrically-shaped body and a plurality of equally and angularly spaced lobes, the inner case being coupled to the needle valve such that the inner case does not rotate on the needle valve; an outer case having a cylindrically-shaped body and a plurality of equally and angularly spaced grooves that are fabricated to define a fuel passageway in cooperation with the lobes of the inner case, the outer case being fixedly attached to the nozzle body; and an inner case rotator for adjusting the level of swirl motion of the injected fuel by axially rotating the inner case relative to the outer case.