Actuator head for piezo actuator module, has recess that does not restrict functionality of actuator head or cavity to reduce mass of actuator head as compared to solid material design

摘要

The actuator head (4) has a recess that does not restrict the functionality of the actuator head or a cavity to reduce the mass of the actuator head as compared to a solid material design. The recess or the cavity is filled with an ambient medium during an application of the actuator head in an ambient medium. An independent claim is included for a piezo actuator module, which has a piezo actuator and a piezo injector.