Actuator module for common-rail injector of e.g. diesel engine, has piezoactuator enclosed between actuator base and head, where base and head are made of insulating material e.g. powder composite material comprising metal particles

摘要

The module has a piezoactuator arranged in a casing and enclosed between an actuator base and an actuator head, where the actuator base and actuator head are made up of an insulating material e.g. powder composite material (23). The material (23) includes metal particles isolated against each other and are bonded by a plastic mixture or metallic oxide-binder layer, where the material has a edge breaking strength of specific value.