Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle

摘要

The injection valve has a nozzle module (12) in which are axially movable a first nozzle needle (13) interacting with a first injection orifice (15), and a second nozzle needle (14) installed co-axially with the first nozzle needle and interacting with a second injection orifice (16). The second nozzle needle is guided in the first nozzle needle in such a way that an opening of the first nozzle needle effects an opening of the second nozzle needle. The first nozzle needle and second nozzle needle interact via a drive ring (30).