| 摘要 |
The rotary distributor fuel injection pump has a drive shaft (66) coupled to a pump rotor (12) by a radially offset and axially extending drive pin (68) with a cylindrical head received within a radial slot (20) in the rotor (12); a coaxial throughbore in the rotor (12) providing a valve bore (32); a valve member (10) in the valve bore (32) axially shiftable to an open position by a compression spring; an electromagnet (11) with an armature plate (172) fixed to one end of the valve member (10) and a stator (170) operable, when energized, to axially shift the valve member (10) to its closed position; a stop plate (120) on the outer end of the rotor (12) having an outer end face engageable by the armature plate (172), the end face having a plurality of lands and grooves to hydraulically dampen the axial movement of the valve member (10) to its open position when the stator (170) is deenergized; the armature plate (172) having a hub received within an opening in the stop plate (120) to couple the armature plate (172) and valve member (10) to the rotor (12); an annular thrust washer (22) and needle bearing (34) between the rotor (12) and a distributor head (42); the distributor head (42) having a rotor support sleeve (40) with an inner annular cantilever section (45) thermally coupled to the rotor (12); the rotor (12) having distributor and balancing bores, each with an inlet port equidistant between the radial axes of adjacent pumping plunger bores. |
