Low cost unitized fuel injection system

F - Mech Eng,Light,Heat,Weapons – 02 – M

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F02M 61/00 (2006.01) F02M 51/00 (2006.01) F02M 51/06 (2006.01) F02M 69/46 (2006.01) F02M 69/54 (2006.01) F02M 51/08 (2006.01)

Patent

CA 1229536

Abstract: A LOW COST UNITIZED FUEL INJECTION SYSTEM A unitized fuel injection system having a common fuel rail, a fuel pressure regulator permanently attached to one end of the fuel rail and a plurality of fuel injector valves having progressive die formed housings permanently attached to the fuel rail. Each fuel injector valve embodies a light weight movable valve member electromechanically actuated by a solenoid coil assembly, a stationary valve member having a conical valve seat and a metering plate having a metering orifice. The movable valve member has an armature and a valve stem having a spherical end surface mating with the conical valve seat. The displacement of the movable valve member is sufficient to allow the fuel flow to be controlled by the size of the metering orifice and virtually independent of the position of the valve stem. Design of the fuel injector valve is directed to minimize machining operations of the valve's component parts to reduce costs.

462769

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