| 摘要 |
PROBLEM TO BE SOLVED: To easily attain the response to the injection operation of the predeter mined actuator of a value to be accumulated in a buffer. SOLUTION: For the timed measurement of a voltage across a device in a charging circuit of the piezoelectric elements 10, 20, 30, 40, 50, 60 used in a fuel injection system, a voltage applied on the device is synchronized with the injection phenomenon of at least one piezoelectric actuator and such voltage is detected and read at the predetermined timing. Here, the device may be a piezoelectric element or a buffer capacitor. |
