Fuel-injector, particularly common-rail-injector, for injecting fuel in combustion chamber of internal combustion engine, has piezoelectric actuator and directly controlled nozzle-needle

摘要

The fuel-injector (1) has a piezoelectric actuator (17) and a directly controlled nozzle-needle (9). The piezoelectric actuator is axially elongated during the attaching of the clamp. A medium for converting the elongation movement of the piezoelectric actuator is provided in an opening movement of the nozzle needle.