| 摘要 |
PROBLEM TO BE SOLVED: To compensate a manufacturing deviation in a piezoelectric element based on an approximation, and thereby to guarantee a correct operation of an injector or a pump element that contains the piezoelectric element. SOLUTION: In the unit for charging the piezoelectric elements (10, 20, 30, 40, 50 or 60), an activation voltage and an activation charge value that drive the piezoelectric elements (10, 20, 30, 40, 50 or 60) is controlled online by a control unit (D), and the activation voltage (U) and the activation charge value are regulated by the control unit (D). Thereby, a deviation arising from a layer thickness or a variation of the number of layers of the piezoelectric elements (10, 20, 30, 40, 50 or 60) is compensated. |
