Patent ID: 6499674
Filing Date: 2002-12-31
Classification: F02M

Abstract:
A fuel injector comprising:a housing having an inlet, an outlet and a longitudinal axis extending therethrough; a seat disposed proximate the outlet, the seat including a sealing surface and a passage extending therethrough; a needle being reciprocally located within the housing along the longitudinal axis between a first position wherein the needle is displaced from the seat, allowing fuel flow past the needle, and a second position wherein the needle is biased against the seat, precluding fuel flow past the needle; a multi-layer orifice plate assembly located at the housing outlet, the orifice plate assembly including: a first orifice plate having a plurality of first openings extending therethrough; and a second orifice plate disposed proximate to the first orifice plate, the second orifice plate including a first face having a central cavity located about the longitudinal axis and a perimeter, a plurality of channels extending radially from the central cavity toward the perimeter, a second face adjacent the first face, and a plurality of second openings extending through the second face; and an air assist sleeve disposed about the housing proximate the outlet, the air assist sleeve including at least one air channel in communication with the plurality of channels.