| 摘要 |
The device uses capacitive control in place of inductive control of the piezoelectric device. The circuit co-operates with a motor computer determining the injection cycle. The actuator has an equivalent capacitance (C) whose charging and discharging is assured by a supply source (S), using two semiconductors components (T1,T2) for charge and discharge respectively. These are controlled in their transitions by a signal (VCM) appearing at the beginning and end of each injection cycle established by the computer. One of the semiconductors (T1) is mounted in series with the capacitor (C) and the other (T2) is connected in parallel. Drive chains (C1, C2) are connected to the control electrodes of these semiconductor devices, applying control voltages (VgsT1, VgsT2) capable of effecting the switching.
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