Fuel injection pump

Claim 2

A fuel injection pump having a pump work chamber enclosed by a pair of pump pistons in a cylinder, the chamber being connectable via at least one fuel supply conduit with a plurality of fuel injection locations in a rotating distributor and further connectable during a suction stroke with a fuel supply line via a plurality of fuel supply bores displaced realtive to each other in said rotating distributor, said plurality of bores being controlled by a control edge guided in synchronism with the rpm of said fuel injection pump, said fuel supply line having a supply source and a pressure regulator, each of said fuel supply bores having a fuel supply line controlled in alternation by an electrically controlled valve to meter fuel via said fuel supply bores, a control device which controls each electrically controllable valve whereby a limitation of the duration of the open communication between said pump work chamber and each fuel supply line can be created on the one hand by means of a switching process of each electrically controllable valve and on the other hand by means of one of the control processes of each control edge, and further wherein the opening times of each electrically controllable valve is variable by means of said control device for controlling said fuel injection quantity and the opening periods of each electrically controllable valve and of the opening of each fuel supply line controlled by each control edge arranged to overlap one another.

Claim 3

A fuel injection pump having a pump work chamber enclosed by a pair of pump pistons in a cylinder, the chamber being connectable via at least one fuel supply conduit with a plurality of fuel injecton locations in a rotating distributor and further connectable during a suction stroke with a fuel supply line via a plurality of fuel supply bores displaced relative to each other in said rotating distributor, said plurality of bores being controlled by a control edge guided in synchronism with the rpm of said fuel injection pump, said fuel supply line having a supply source and a pressure regulator, which establishes the pressure of said fuel supply source at a constant level, each of said fuel supply bores having a fuel supply line controlled in alternation by an electrically controlled valve to meter fuel via said fuel supply bores, a control device which controls each electrically controllable valve whereby a limitation of the duration of the open communication between said pump work chamber and each fuel supply line can be created on the one hand by means of a switching process of each electrically controllable valve and on the other hand by means of one of the control processes of each control edge, and further wherein the opening times of each electrically controllable valve is variable by means of said control device for controlling said fuel injection quantity and the opening periods of each electrically controllable valve and of the opening of each fuel supply line controlled by each control edge arranged to overlap one another.

Claim 4

A fuel injection pump having a pump work chamber enclosed by a pair of pump pistons in a cylinder, the chamber being connectable via at least one fuel supply conduit with a plurality of fuel injecton locations in a rotating distributor and further connectable during a suction stroke with a fuel supply line via a plurality of fuel supply bores displaced relative to each other in said rotating distributor, said plurality of bores being controlled by a control edge guided in synchronism with the rpm of said fuel injection pump, said fuel supply line having a supply source and a pressure regulator, which establishes the pressure of said fuel supply source at a constant level, each of said fuel supply bores having a fuel supply line controlled in alternation by an electrically controlled valve to meter fuel via said fuel supply bores, a control device which controls each electrically controllable valve whereby a limitation of the duration of the open communication between said pump work chamber and each fuel supply line can be created on the one hand by means of a switching process of each electrically controllable valve and on the other hand by means of one of the control processes of each control edge, and further wherein the opening times of each electrically controllable valve is variable by means of said control device for controlling said fuel injection quantity and the opening periods of each electrically controllable valve and of the opening of each fuel supply line controlled by each control edge arranged to overlap one another.