Fuel injector for internal combustion engine, has piezo-actuator actuating force-balance formed servo valve under in connection of hydraulic combiner, where injector is actuated by piezo-actuator, which controls servo valve

摘要

The injector (5) has a piezo-actuator (20) actuating a force-balance formed servo valve (30) under in connection of a hydraulic combiner (10). The force-balance formed hydraulic servo valve is provided with a piston-shaped formed control slide (31). The injector is actuated by the piezo-actuator, which controls the servo valve, by which an injection valve member (44) is controlled, where the injection valve member releases or closes an injecting opening (46) at a combustion chamber-sided end of the injector.