Patent ID: 6820826
Filing Date: 2004-11-23
Classification: F02M

Abstract:
A fuel injector comprising:a housing having a passageway extending between an inlet and an outlet along a longitudinal axis; a seat having a sealing surface facing the inlet and forming a seat orifice, terminal seat surface spaced from the sealing surface and facing the outlet, a first channel surface generally oblique to the longitudinal axis and disposed between the seat orifice and the terminal seat surface; a closure member disposed in the passageway and contiguous to the sealing surface so as to generally preclude fuel flow through the seat orifice in one position, the closure member being coupled to a magnetic actuator that, when energized, positions the closure member away from the sealing surface of the seat so as to allow fuel flow through the passageway and past the closure member; and a metering disc proximate the seat so that a virtual projection of the sealing surface onto a metering disc defines a first virtual circle about the longitudinal axis, the metering disc including a second channel surface confronting the first channel surface so as to form a flow channel, the metering disc having at least one metering orifice located outside of the first virtual circle, each of the at least one metering orifice extending generally parallel to the longitudinal axis between the second channel surface and an outer surface of the metering disc, the at least one metering orifice being located on one quadrant defined by first and second perpendicular planes parallel to and intersecting the longitudinal axis so that when the coil energizes the closure member to the actuated position, a flow of fuel through the at least one metering orifice is targeted within an arcuate sector of at least 90 degrees about the longitudinal axis proximate the metering disc.