High pressure fuel pump for a fuel system on a direct injection internal combustion engine, fuel system and internal combustion engine

摘要

A high-pressure fuel pump (10) is used for a fuel system of a direct-injecting internal combustion engine. This pump includes a housing (14, 32). It is also provided with a low-pressure inlet (16) and a delivery chamber (20). The fuel is compressed in the delivery chamber (20). An insert (38) is also provided, which delimits the delivery chamber (20) in the direction toward the low-pressure inlet (16). The insert (38) contains at least one radial flow conduit (48). The insert (38) is axially supported against the housing (32). The high-pressure fuel pump (10) also has a high-pressure outlet (18). In order to reduce the manufacturing costs of the high-pressure fuel pump (10), the invention proposes that the radial flow conduit (48) be delimited by a recess in an axial end face (44) of the insert (38).