Patent ID: 6766969
Filing Date: 2004-07-27
Classification: F02M

Abstract:
An injection valve seat/director formed as an integral multiple function multiple thickness unit for an engine fuel injector, said unit adapted for manufacture by electroforming processes and comprising:a generally circular thin disk having a generally flat lower surface and an upper surface including an outer portion, a central portion and an intermediate portion; the outer portion including at least one raised annular rib having a flat upper surface for engaging a cooperating injector surface; the central portion including at least one endless rib having a flat upper surface forming a valve seat engagable by a movable valve member of an injector, said valve seat surrounding a recessed spray director portion including a plurality of fuel spray openings through the seat/director unit; and said intermediate portion including a recessed area extending around the valve seat for receiving pressurized fuel for delivery to the fuel spray openings upon unseating of the valve member from the valve seat; wherein the electroformed disk is formed accurately without machining and is made thin to minimize the mass of metal and the cost of the electroforming process.