Fuel high pressure pump for use as plug-in pump for conveying fuel for common rail fuel injection system of internal combustion engine, has safety ring inserted into annular ring and projecting over annular ring in relaxed condition

摘要

The pressure pump (14) has a pump element with a tappet (50) for transferring a stroke movement of a camshaft to a piston (56), and a circular guide formed between the tappet and a cylinder (28). The cylinder has an annular groove, and a safety ring (72) is inserted into an annular ring, where the safety ring projects over the annular ring in a relaxed condition. The safety ring is formed as a spraying ring according to DIN 7993standard. A recess is larger than or equal to a stroke of the pump element in an axial direction.