| 摘要 |
The invention relates to a piezoelectric actuator, in particular for actuating control valves or injection valves in internal combustion engines in motor vehicles, having a piezoelectric actuator body, in particular in the form of a multilayer laminate of layered plies of piezoelectric material and intervening metal or electrically conductive layers acting as electrodes, in which one of the face ends of the actuator body is fixed on an actuator base, and the actuator body is surrounded by a module wall so as to define an interstice there between, and the interstice is filled with an elastic or plastic electrically insulating material of good thermal conductivity, which is solid at least in the temperature range below the operating temperature of the actuator.
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