Patent ID: 6769625
Filing Date: 2004-08-03
Classification: F02M

Abstract:
A fuel injector comprising:a housing having an inlet, an outlet and a longitudinal axis extending therethrough; a seat, the seat including a sealing surface, an orifice, a first channel surface, a terminal seat surface and a longitudinal axis extending therethrough; a metering disc contiguous to the seat, the metering disc including a second channel surface confronting the first channel surface, the metering disc having a plurality of metering orifices extending generally parallel to the longitudinal axis, the metering orifices being located about the longitudinal axis and defining a first virtual circle greater than a second virtual circle defined by a projection of the sealing surface onto a metering disc so that all of the metering orifices are disposed outside the second virtual circle; a closure member being reciprocally located between a first position wherein the closure member is displaced from the seat, and a second position wherein the closure member is biased against the seat, precluding fuel flow past the closure member; 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 from the orifice of the seat to a location cincturing the plurality of metering orifices, such that a flow path exiting through each of the metering orifices forms a spray angle oblique to the longitudinal axis.