HIGH PRESSURE TWO-PIECE PLUNGER PUMP ASSEMBLY

摘要

A high pressure pumping apparatus for of an internal combustion engine includes a pump barrel having a bore with a central axis, and a two-part pumping plunger provided in the bore of the barrel. The two-part plunger includes first and second pumping plunger parts that are separate from one another and arranged substantially coaxial with the central axis of the barrel's bore. A first distal end portion of the first pumping plunger part abuts a first distal end portion of the second pumping plunger part, and a second distal end portion of the first pumping plunger part in part defines a pumping chamber. The high pressure pumping apparatus includes and a tappet assembly that is operably coupled to the second distal end portion of the second pumping plunger part for operably engaging a rotating camshaft, which causes the first and second plunger parts to move in reciprocal motion.