High pressure pump, particularly radial or in-line piston pump for fuel injection systems of air-compressing auto-ignition internal combustion engines, has housing part and pump assembly, which has pump working chamber

摘要

The high pressure pump (1) has a housing part (3) and a pump assembly (5), which has a pump working chamber (15) formed in the housing part. A piston (6) is guided in a bore (7) of the housing part, which limits the pump working chamber. A piston interior (30) is formed within the piston and is limited in sections by a piston wall (33) of the piston.