High pressure pump for fuel injector of internal combustion engine, has pump piston which is driven about rotational axis by rotation of drive shaft, where roller circumferential surface is designed to stay in contact with cam

摘要

The high pressure pump (1) has a pump piston (5) which is driven about a rotational axis (7) by rotation of a drive shaft (3). A cam (6) is arranged on the drive shaft, where a tappet assembly arranged on the pump piston. A roller circumferential surface (25) is designed to stay in contact with the cam, and is spaced from a roller shoe (22).