DISTRIBUTION TYPE FUEL INJECTION PUMP

PURPOSE:To easily control an injection time and an injection amount, by adjusting the flow of high pressure fuel from a distribution pump chamber to a low pressure section. CONSTITUTION:When a timing electromagnetic valve 30 is opened so that fuel is injected by a controller 1 at the optimum time of an engine, communication between a timing passage 8 and a feed passage 9 is shut off, the fuel in a distribution pump chamber 26 starts to be compressed into a high pressure, and with a feed check valve 32 closed, the fuel is forcibly fed from a discharge valve 24 to inject it through a nozzle. After injection continues only during a time for which an optimum injection amount is obtained according to the load of an engine, the electromagnetic valve 3 is opened to intercommunicate a spill passage 5 and a drain passage 42, and the high pressure fuel in the distribution pump chamber 26 is discharged to a tank 52 through a control port 6, the spill passage 5, and a drain passage 42.