Regulating device for a fuel injection pump

A regulating device for the supply amount of a fuel injection pump for internal combustion engines including a housing, a fuel injection pump suction chamber in said housing, a pump piston, a pump operation chamber, a relief channel in said pump piston which extends to said pump operation chamber, an annular slide operative on said piston for opening and closing said relief channel in said piston, a quantity control element fastening to said pump housing and including a rotary magnet having an axis and further including means connecting said axis to said annular slide to move said annular slide axially on said pump piston to regulate fuel supply onset or end thereof by opening or closing said relief channel of said pump operation chamber, and an adjustment means positioned relative to said quantity control element for moving said quantity control element for adjustment of its position relative to said annular slide while said engine is running.