| 摘要 |
<p>The invention relates to a piezoelectric actuator, in particular for actuating control valves or injection valves in internal combustion engines of motor vehicles, having a piezoelectric actuator body in the form of a multi-layer laminate of stacked layers of piezoelectric material and metal or electrically conductive layers, acting as electrodes, located between them, in which one of the face ends of the actuator body is fixed to a stationary metal actuator base, and the other face end borders a metal retaining plate that is movable with the actuator stroke. The piezoelectric actuator is characterized in that the piezoelectric material has blind metal electrodes on both face ends, each of which electrodes is located in a passive piezoceramic cover layer between the respective outermost active piezoceramic layer and the movable retaining plate and actuator base.</p> |
