Fuel injection pump

Claim 1

A fuel injection pump having at least one work chamber enclosed by a pump piston in a cylinder in a housing, which work chamber can be made to communicate with an associated fuel injection location via at least one supply line during a compression stroke of the pump piston and with a fuel supply conduit during the filling stroke of the pump piston; a relief conduit leading to a reservoir chamber having a movable wall loaded by a restoring force, the communication of the relief conduit with the work chamber being opened after an adjustable compression stroke of the pump piston, by means of a control edge guided in synchronism with the drive of the pump piston, wherein the location of a control point of the control edge relative to a reference point of the pump piston drive means is variable and wherein the reservoir chamber is connected to the work chamber during the filling stroke of the pump piston, characterized in that the said fuel supply conduit communicates with an adjustable fuel quantity metering device, and said control edge is one limiting edge of a control groove disposed on a jacket face of a distributor rotatable in synchronism with the pump piston and guided in a cylinder wherein the width of said control groove determines the piston stroke during which said relief conduit and said reservoir chamber are connected to said work chamber, the distributor having a distributor groove communicating with the pump work chamber, by means of which distributor groove one after another of a multiplicity of supply lines leading away from the cylinder can be made to communicate, upon the rotation of the distributor, with the pump work chamber during a compression stroke of the pump piston, and that the location of the control point of the control edge relative to a reference point of the pump piston drive means is variable in accordance with operating parameter.