Patent ID: 6491237
Filing Date: 2002-12-10
Classification: F02M

Abstract:
A fuel injector nozzle having a body and fuel ducts for delivering fuel, comprising:a cavity within the body of the fuel injector forming a chamber connected to the fuel ducts and connected to said chamber, the body having inside and outside walls and cylindrical spray holes having a length from said inside walls to said outside walls and a diameter wherein the ratio of said spray hole length divided by said diameter is maintained as a predetermined constant and wherein said inside walls of said cavity terminates in a valve seat and sac, said seat having an apex and said sac having a bottom point and a center; an inverted dome formed by said outside walls of said cavity, said dome having a radius and a center at the same point as said center of the said sac wherein said dome radius is greater than said sac radius and; a valve having a tip, said valve traveling in downward and upward strokes, respectively blocking and unblocking said spray holes, wherein said valve stops in its downward stroke at said valve seat, said apex of said valve seat is at the same point as said bottom point of said sac and said valve tip travels to the bottom point of the sac during said downward stroke.