FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES AND METHOD FOR MAKING SAME

摘要

A fuel injector nozzle (10) inlcudes a nozzle body (12) and a poppet (14) disposed in the body for reciprocating movement. The body has an internal bore (28) surrounding the poppet. The internal bore tapers in a constant angle of taper from a front seating region to a fuel reservoir region (68). The poppet has a corresponding surface (56) which diverges slightly from the bore. The surfaces of the bore (54) and poppet (56) form flow control surfaces which terminate in a sharp-edged orifice at the front face of the nozzle. When the poppet is displaced to an open or flow position, fuel is accelerated to the orifice and atomized into a combustion chamber.