Piezoelectric actuator for e.g. dosing fuel from pressurized source for fuel injection valve, comprises hydraulic fluid which forms electrical passivation layer for actuator stack

摘要

The piezoelectric actuator comprises an actuator stack with and end side between the cover element and floor element. Hydraulic fluid is provided in the actuator chamber. Hydraulic fluid forms an electrical passivation layer for the actuator stack (24). An Independent claim is included for the corresponding method of manufacture.