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(11) | EP 1 344 932 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Lubricant supply unit of high pressure fuel pump |
| (57) 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). |