Patent ID: 6179227
Filing Date: 2001-01-30
Classification: F02M

Abstract:
A fuel injector comprising:a valve body having an inlet, an outlet, and an axially extending fuel passageway from the inlet to the outlet;an armature proximate the inlet of the valve body;a needle valve operatively connected to the armature;a valve seat proximate the outlet of the valve body; anda flat swirl generator disk adjacent the valve seat, the flat swirl generator disk including at least one slot extending tangentially from a central aperture; anda flat guide disk having a first surface, a second surface adjacent the flat swirl generator disk, a guide aperture, and at least one fuel passage having a wall extending between the first surface and the second surface, the wall including an inlet, an outlet, and a transition region between the inlet and the outlet that defines a cross-sectional area of the at least one passage, the inlet being proximate the first surface, the outlet being proximate the second surface, the transition region being configured so that the cross-sectional area of the at least one fuel passage increases as the transition region approaches the outlet of the wall.