HIGH PRESSURE DIESEL FUEL PUMPS

摘要

A high pressure diesel fuel pump comprises a pumping assembly and a drivetrain assembly. The pumping assembly comprises a plunger (20) extending from a pump head (10) along a pumping axis (A-A'). The drivetrain assembly comprises a drive shaft (100) and a cam (80) within a cambox, a shoe (50) for contact with a lower end (22) of the plunger (20), a roller (70) mounted within a cavity (52) of the shoe (50) for contact with the cam (80), and a shoe guide (60) mounted within a guide chamber substantially between the cam (80) and the plunger (20) and adapted to receive the shoe (50) and roller (70) within a bore (62). The shoe guide (60) comprises a pair of tangs (68) extending from a lower end (61) of a main body (64) of the she guide (60) to support the roller (70).