Patent ID: 6776353
Filing Date: 2004-08-17
Classification: F02M

Abstract:
A fuel injector for use in a fuel injection system of an internal combustion engine, the fuel injector comprising:a body having an inlet, an outlet and a longitudinal axis entering therethrough; a valve seat disposed proximate the outlet, the valve seat having a first surface and a second surface, the valve seat including a valve seat orifice disposed between the first surface and the second surface; a closure member movable along the longitudinal axis between a first position occluding fuel flow and a second position permitting fuel flow through the valve seat orifice, the closure member and the valve seat defining a sealing surface in the first position of the closure member, the sealing surface located on a virtual circle that defines a sealing diameter; an orifice plate proximate the outlet, the orifice plate having a third surface and a fourth surface, the orifice plate including at least one orifice disposed between the third and fourth surfaces, the at least one orifice located on a virtual circle on the orifice plate that defines a first diameter; and a metering device located between the valve seat and the orifice plate, the metering device having a first face and a second face contiguous to a third face, at least one of the first and third faces being spaced from one of the first and second surfaces of the valve seat to define a plurality of passages, each passage having an inlet to the passage and an outlet from the passage, the outlet of each passage being located on a virtual circle that defines a second diameter greater than each of the first diameter and the sealing diameter.