METHOD FOR DRIVING FUEL INJECTION PUMP

摘要

An electromagnetic driving fuel injection pump (20) for releasing fuel toward a return path (5) in the initial region of pressure feed process by a plunger (21) and pressure feeding fuel toward an injection port (33) in the late region of pressure feed process, wherein pulse conduction not leading to fuel injection is performed for a coil (23) such that the plunger (21) reciprocates in the initial region when an engine (2) is idling or stopped immediately after heavy load operation and then restarted. Since vapor is discharged efficiently, flow rate of recirculating fuel is increased to accelerate cooling action and since generation of vapor is suppressed, starting performance or restarting performance is enhanced. Furthermore, the volume of vapor being discharged by a fuel injection pump is increased while stabilizing the fuel injection and enhancing the starting performance.