Patent ID: 6161773
Filing Date: 2000-12-19
Classification: F02M

Abstract:
A fuel injector nozzle comprising:a nozzle housing including a nozzle spray tip defining a blind bore along a longitudinal axis with at least one orifice defined through an end portion of the tip also defining a bottom portion of the bore and a guide passage at a top portion of the bore and an injection chamber between the bottom portion of the bore and the guide passage and the housing also defining a fuel injection passage intersecting the guide passage, the nozzle housing including a guide washer disposed over a top of the nozzle spray tip providing an extension of the guide passage and there being a groove in one of the nozzle spray tip and the guide washer serving as a portion of the fuel injection passage intersecting the guide passage;a needle check slidably disposed in the blind bore for slidable axial displacement therein between a first position in which a seat portion thereof is disposed against the end portion of the tip and in which a guide portion thereof with a portion of the guide passage below the fuel injection passage defines a first flow area restrictive of fluid flow therethrough and also defines a second position in which the seat portion is spaced from the end portion of the tip and the guide portion with the guide passage below the fuel injection passage defines a second flow area larger than the first flow area and less restrictive of flow therepast.