| 摘要 |
<p>A fuel injection pump for injecting compressed fuel to an engine through a reciprocative motion of a plunger (4) includes a vertically-elongated plunger barrel (3), and a plunger (4) having a shaft portion which is vertically and reciprocatively slidable along the inner space of the plunger barrel (3), at least one of the inner wall of the plunger barrel (3) and the peripheral surface of the shaft portion of the plunger (4) being formed with an oil groove (53) for temporarily storing oil which ascends from a cam chamber (51) through a reciprocative motion of said plunger (4), wherein the oil groove (51) has at least two side walls at the upper and lower sides thereof and a lower side wall (55) at the lower side is downwardly slanted to return the stored oil to the cam chamber (51). <IMAGE></p> |
