of a control slide having oblique control edges at least two control edges are provided in a window like recess of the control slide of which the lower edge in each case and possibly the upper one as well extend obliquely the upper control edge provided in the recess determines the supply onset in cooperation with the first control bore and the lower control edge of the recess determines the end of supply in cooperation with the second control bore application_number US 73061785 A description the exemplary embodiment shown here is a fuel injection pump of the type shown in fig1 which is externally driven by an engine camshaft and inserted into the engine block naturally the invention can also be realized in other suitable fuel injection pumps such as in line pumps in the exemplary embodiment a cylinder bushing 11 is inserted into a pump housing 10 which is flanged to a crankshaft housing not shown and a pump piston 12 is guided in an axially displaceable and rotatable manner in the cylinder bushing 11 in an aperture 13 of the cylinder bushing 11 a control slide 14 is disposed on the pump piston 12 such that it is axially displaceable and rotatable with its upper end face 15 the pump piston 12 defines a pump work chamber 16 which is closed by a cover plate 17 in which a pressure line 18 leading to a pressure valve not shown and pressure lines communicating with the engine cylinders extends the pump piston 12 is driven in a known manner via a tappet 20 guided in the pump housing 10.