Regardless of being four cylinder dispensing pumps is six cylinder dispensing pumps, the plunger completes one time enters the oil, the pressure oil and the assignment feed process is the same, presently relates in detail as follows:
     (1) enters the oil process
     When two-dimensional cam peak and hoop contact, the plunger is in the top dead center. The plane cam drum continues to rotate, the hoop slides along the two-dimensional cam drop section, the plunger downward and also revolves, in its oil-feed tank and distributor barrel's oil in connection, this time on the plunger the fuel tank has transferred in the distributor barrel the oil hole to shut down, the diesel oil enters the plunger cavity after in the solenoid valve and distributor barrel's oil. When the plunger arrives at the bottom dead center to enter oil end of process, the two-dimensional cam revolved to the bottom and the hoop contact.
     (2) reduces the injection process
     When the plane cam drum continues revolving, the hoop raises along the cam ascent portion, above the plunger upward compression diesel oil, and simultaneously revolves causes the oil-feed tank to transfer in distributor barrel's oil to close. But leaves in the fuel tank and the distributor barrel the oil hole connection, continues along with the plunger upward, the high-pressured diesel oil after the delivery valve, the high-pressure oil pipe and the spray hole gushes in the cylinder.
     (3) feed conclusion
     When the plunger rises to the certain extent, on plunger's unloading hole reveals control sleeve's control plane, in the plunger cavity high-pressured diesel oil after plunger's central oil lead unloading, the flowing tubing head pressure drops rapidly, feed conclusion.
     (4) presses the process