Patent ID: 6422487
Filing Date: 2002-07-23
Classification: F02M,Y10S

Abstract:
A fuel injector having an inlet, an outlet, and a passageway providing a fuel flow conduit from the inlet to the outlet, the fuel injector comprising:a needle positionable in the passageway between a first position occluding the passageway and a second position permitting fuel flow; and an injector seat assembly including: an injector seat having a longitudinal seat channel extending along a longitudinal channel axis, the longitudinal seat channel having at least a first portion and at least a second portion, the at least a first portion having a first surface oblique to the longitudinal axis, the injector seat being constructed from a first material; and an insert fixedly inserted into the longitudinal seat channel, the insert having a longitudinal insert channel and a longitudinal insert channel axis extending along the longitudinal seat channel axis, the insert having a second surface oblique to the longitudinal insert channel axis and contiguous the at least first portion of the channel so that fuel flowing through the fuel injector contacts the first and second surfaces, the insert being constructed from a second material different from the first material.