A fuel injector having an integrated seat and swirl generator

A fuel injector with a body having an inlet portion (24), an outlet portion, and a fuel passageway (16) extending from the inlet portion (60) to the outlet portion (62) along a longitudinal axis (18). An armature (46) proximate the inlet portion of the body (52). A needle (68) operatively connected to the armature. A seat (64) is located proximate the outlet portion (62) of the body. The seat (64) includes a first surface (78), a second surface (80), a seat passage (70) extending between the first surface (78) and the second surface (80) in the direction of the longitudinal axis (18), and a swirl generator (82) formed in the first surface (78) that communicates with the passage (70). A flat disk (84), which is located proximate the first surface (78), includes an aperture (88) that guides the needle (68) and at least one opening (90) that communicates with the swirl generator (82) of the seat (64). The flatdisk (84) combined with the seat (64) provide a seat, swirl generator, and needle guide combination.