| 摘要 |
[Problem] To provide a multilayered piezo element in which the peeling of an exterior electrode plate can be suppressed, and to provide a piezo actuator, an injection apparatus, and a fuel injection system provided with the element. [Solution] This multilayered piezo element (1) is characterized by including a layered body (4) obtained by layering dielectric layers (2) and interior electrode layers (3), and also including an exterior electrode plate (6) attached to a side surface of the layered body (4) by a conductive bonding member (5), a metal coating layer (7) being provided on the surface of the exterior electrode plate (6), and the metal coating layer (7) having a thick section (71) having a greater thickness than the area corresponding to the center section (4b) of the layered body (4), the thick section (71) being provided to a region corresponding to one end section (4a) of the layered body (4) in the layering direction. |
