Fuel pump
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorKensho KATO
Life of this patent
Estimating the term…
Abstract
A fuel pump comprising: a pump head (23); a plunger barrel (32) provided with a support hole (38) and having one end portion side of the support hole (38) in the axial direction fastened to the pump head (23); a plunger (41) supported by the support hole (38) so as to move along the axial direction; a pressurizing chamber (56) defined by one end portion of the support hole (38) and one end portion of the plunger (41) in the axial direction; a fuel discharge passage (73) having one end portion communicating with the pressurizing chamber (56); a fuel suction passage (70) having one end portion communicating with the fuel discharge passage; and a recessed portion (101) provided to at least one of the inner surface of the one end portion of the support hole (38) and the outer surface of one end portion of the plunger (41).
Claims7
A fuel pump comprising:
- a pump head;
- a plunger barrel that is provided with a support hole and in which one end portion side of the support hole in an axial direction is fastened to the pump head;
- a plunger that is supported by the support hole so as to be movable along the axial direction;
- a pressurization chamber partitioned by one end portion of the support hole and one end portion of the plunger in the axial direction;
- a fuel discharge channel of which one end portion communicates with the pressurization chamber;
- a fuel suction channel of which one end portion communicates with the fuel discharge channel;
- and
- a recess portion that is provided on at least one of an inner surface of the one end portion of the support hole or an outer surface of the one end portion of the plunger.
Dependencies are inferred from the claim text.