Fuel injection pump

A fuel injection pump for internal combustion engines having at least one reciprocating pump piston (3) defining a pump work chamber (4) in a pump cylinder (2), said piston has at least one control recess (22) on a jacket face which communicates through an axial conduit (26) with the pump work chamber (4), an oblique control edge (23), (28) that extends at a predetermined angle with respect to an axis of the pump piston (3), an annular slide (15) that is adjustable on the pump piston (3) and has a control bore (20), that penetrates a wall of the annular slide, said control bore is openable in the course of the pump piston stroke by the oblique control edges (23), (28) of the control recess (22) and in so doing connects the pump work chamber (4) with a fuel-filled low-pressure chamber surrounding the annular slide (15), in order to control the end of a high-pressure supply, the control bore (20) is disposed angularly to the pump piston axis and pierces a radial plane at an angle with respect to the pump piston axis in the annular slide (15), and an axis of the control bore 20 is disposed such that an ellipse-like entry cross section at the inner wall (21) of the annular slide (15) is located substantially parallel to the oblique control edge (23), (28) of the control recess (22).