Patent ID: 6918377

Claim:
A fuel injection nozzle for an internal combustion engine, the injection nozzle comprising a nozzle body ( 3 ) protruding into the combustion chamber, two coaxial nozzle needles ( 5 , 7 ), the outer nozzle needle ( 5 ) being guided in the nozzle body ( 3 ), a second nozzle needle seat in the nozzle body ( 3 ) for the outer nozzle needle ( 5 ), and a first nozzle needle seat for the inner nozzle needle ( 7 ), the inner nozzle needle ( 7 ) being guided in the outer nozzle needle ( 5 ), and the first nozzle needle seat ( 21 ) being disposed in the outer nozzle needle ( 5 ), wherein the inner nozzle needle ( 7 ), with its end ( 29 ) remote from the combustion chamber, defines one end of a first control chamber ( 31 ), present in the outer nozzle needle ( 5 ), and a closure element ( 11 , 11 a , 11 b ) cooperating with the outer nozzle needle ( 5 ) defines the other end of the first control chamber ( 31 ).