Importance

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Abstract

A rotary distributor fuel injection pump with a drive shaft coupled to a pump rotor by a radially offset and axially extending drive pin with a cylindrical head received within a radial slot in the rotor; a coaxial throughbore in the rotor providing a valve bore; a valve member in the valve bore axially shiftable to an open position by a compression spring; an electromagnet with an armature plate fixed to one end of the valve member and a stator operable, when energized, to axially shift the valve member to its closed position; a stop plate on the outer end of the rotor having an outer end face engageable by the armature plate, the end face having a plurality of lands and grooves to hydraulically dampen the axial movement of the valve member to its open position when the stator is deenergized; the armature plate having a hub received within an opening in the stop plate to couple the armature plate and valve member to the rotor; an annular thrust washer and needle bearing between the rotor and a distributor head; the distributor head having a rotor support sleeve with an inner annular cantilever section thermally coupled to the rotor; the rotor having distributor and balancing bores, each with an inlet port equidistant between he radial axes of adjacent pumping plunger bores.

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First Claim