Patent ID: 6070812
Filing Date: 2000-06-06
Classification: F02M

Abstract:
A fluid injection valve including a valve seat having a conical valve seat surface on an inner periphery thereof, a needle having an edge surface and an annular contact part for seating in annular contact with said conical valve seat surface, an orifice plate having a perforated surface disposed in a downstream portion at a distance from said edge surface of said needle and at a distance from said valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said inner periphery of said valve seat, whereinsaid perforated surface has a plurality of first orifices on a first circle and a plurality of second orifices on a second circle outside said first circle;said annular contact part and said valve seat surface are inclined to said perforated surface to cause fluid to impinge on said perforated surface thereby forming a fuel flow along said perforated surface to said first orifices.