| 摘要 |
A fuel pump unit (10) having a pump head (12) provided with an axial (A) blind bore (14) within which is arranged a piston (20) extending from an inner end (22), inside the bore (14), to an outer end (24), outside the head (12), the outer end cooperating with a cam follower (26) and a cam (28) that rotations reciprocally displace the piston (20). The pump unit (10) further comprises a coil spring (44) axially compressed between pump head (12) and the cam follower (26) and a tubular turret assembly (30) extending toward the cam (28) and provided with a through bore (40) through which extends the piston (20), the final spirals (46) of the spring (44) being slipped around the outer surface of the turret (30).The turret (30) in an added part, non-integral to the pump head (12) and, arranged in abutment against an under face (16) of the pump head (12), the blind bore (14) being coaxial (A) to said through bore (40) arranged in the turret (30). |
