Fuel injection nozzle

A fuel injection nozzle for internal combustion engines comprising, in combination, a nozzle holder, a nozzle body having a plurality of injection openings, conduit means for supplying pressurized fuel to said nozzle body, a valve needle slidably disposed in said nozzle body, means in said nozzle holder for urging said valve needle in one direction for closing engagement with said injection openings, said valve needle being slidably movable in the opposite valve opening direction throughout a stroke determined by the pressure of said pressurized fuel supplied by said supplying means to vary the cross-sectional flow area of said injection openings, an adjusting piston slidably disposed in said nozzle holder, a positioning spring in said nozzle holder engageable with said adjusting piston for urging said adjusting piston into said rest position in the opening direction of said valve needle, conduit means in said nozzle holder for applying a pressurized control fluid to said adjusting piston independent of pressurized fuel supplied to said nozzle body for controlling the stroke of said needle in said opposite valve opening direction, said adjusting piston being slidably movable by said control fluid from a rest position in said one direction for limiting the stroke of said valve needle and therefore the cross-sectional flow area of said injection openings.