| 摘要 |
This high-pressure pump (1) is provided with a plunger (40) which is capable of reciprocating inside a cylinder (10). A holder (60) provided on the opposite side of a compression chamber of the cylinder has a large cylindrical section (63) that forms a predetermined space (65) with the outer wall of the plunger, and a small cylindrical section (64) provided on the side of the cylinder opposite to the large cylindrical section. A pin (71), which is inserted into a hole (43) in the plunger at a position corresponding to the large cylindrical section, protrudes from the outer wall of the plunger in the outward radial direction and is accommodated in the space (65) of the large cylindrical section. Consequently, the pin engages with a stepped surface (66) between the large cylindrical section and the small cylindrical section of the holder before the high-pressure pump is attached to an internal combustion engine whereby the plunger is prevented from falling out of the cylinder. Consequently, the plunger can be prevented from falling out regardless of the assembly direction of the plunger in the cylinder. |
