High-pressure pump for feeding fuel to an internal combustion engine

摘要

A high-pressure pump for feeding fuel to an internal combustion engine has a pump housing (2); a fuel delivery duct (3); and a check valve (4; 35), which is arranged along the delivery duct (3), and comprises a seat (7); a shutter (13; 36) mobile within the seat (7); and a biasing and guiding assembly (14; 37), which has a fastening member (16; 38) suitable for being fastened to the pump housing (2) and sealing the seat (7) in a fluid-tight manner; a helical spring (17; 39) suitable for biasing the shutter (13; 36); and a bushing (18; 40) arranged about the helical spring (17; 39) in order to prevent curving of the helical spring (17; 39).