Piezoelectric actuator particularly for operating control valves or injection valves in vehicles, has additional planar electrode strip adjacent actuator body with double comb-type legs

摘要

The actuator comprises an actuator body in the form of a multilayered laminate and outer electrodes (3,5) with electrical connection directors (7) with planer electrode strip (3) in contact for connecting the piezoelectric actuator to an electrical voltage. The outer electrodes (3,5) have additional electrodes in the form of a planer electrode strip (3) in contact via narrow elastic legs (6) at several locations. The elastic legs (6) of the additional electrodes (5) are connected with the electrode strip (3) by spot laser welding.