Patent ID: 6921021
Filing Date: 2005-07-26
Classification: F02M,Y10S

Abstract:
1. 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 having a sealing surface surrounding a seat orifice, the seat orifice being disposed along the longitudinal axis between the sealing surface and a first channel surface extending generally orthogonal about the longitudinal axis; a closure member reciprocally located within the housing along the longitudinal axis between a first position displaced from the sealing surface to permit fuel flow through the seat orifice and a second position of the closure member contiguous to the sealing surface to occlude fuel flow; a metering disc having a plurality of metering orifices extending through the metering disc along the longitudinal axis, the metering orifices being located about the longitudinal axis on a first virtual circle greater than a second virtual circle defined by a projection of the sealing surface converging at a virtual apex disposed on the metering disc, the metering disc including a second channel surface confronting the first channel surface, the second channel surface having at least a first surface portion generally oblique to the longitudinal axis and at least a second surface portion forming curved surface with respect to the longitudinal axis; and a controlled velocity channel formed between the first and second channel surfaces, the controlled velocity channel having a first portion changing in cross-sectional area as the channel extends outwardly along the longitudinal axis to a location cincturing the plurality of metering orifices such that a fuel flow path exiting through each of the plurality of metering orifices forms a flow path oblique to the longitudinal axis.