| 摘要 |
A lubricant supply unit of a fuel pump (1) includes: 1) a pump plunger (26) moving up and down for pressurizing a fuel, the pump plunger (26) having a lower end (26a); 2) a cam (20, 21) making a rotation; 3) a lifter (28) disposed in such a manner as to oppose the lower end (26a) of the pump plunger (26), the lifter (28) having a bottom wall portion (28b) on which the cam (20, 21) abuts, the lifter (28) making a slidable movement up and down by the rotation of the cam (20, 21); and 4) a lifter guide (23) mating with the lifter (28) in such a manner as to allow the lifter (28) to make the slidable movement up and down in the lifter guide (23), the lifter guide (23) being formed with a lubricant supply hole (51) for supplying a lubricant to a sliding face of the lifter guide (23) and a sliding face of the lifter (28), the lubricant supply hole (51) opening in an inner wall face of the lifter guide (23). The lubricant supply hole (51) is disposed at such a height that the lifter (28) at a bottom dead center allows a first part of the lubricant supply hole (51) to open at an upper end of the lifter (28) and a second part of the lubricant supply hole (51) to be covered with an outer periphery of the lifter (28). <IMAGE> |
