Patent ID: 7185832

Claim:
A fuel injection nozzle for injecting fuel into a combustion chamber of an internal combustion engine, comprising a nozzle housing ( 1 ) having a nozzle opening with a nozzle seat ( 4 ) at one end thereof, a closure member ( 5 ) movably supported in the nozzle housing ( 1 ) so as to be seated in the nozzle opening and forming a seal area, a nozzle needle ( 2 ) axially movably supported in the nozzle housing ( 1 ) and carrying at one end the closure member ( 5 ) for lifting the closure member outwardly off its seat ( 4 ) in the nozzle opening where, in its closed position, the closure member ( 5 ) is in sealing engagement with the nozzle seat ( 4 ), but from which it is raised outwardly during operation so as to form a gap between the nozzle seat ( 4 ) and the closure member ( 5 ) to permit fuel to flow through the gap and into the combustion chamber where it forms a hollow cone, at least one of the nozzle seat ( 4 ) and the closure member ( 5 ) having at least one turbulence chamber ( 7 ) arranged in said seal area for imparting turbulence to the fuel flowing through the gap for injection into the combustion chamber.