Control method for controlling capacitive actuator esp. piezo-actuator for fuel injection valve of combustion (IC) engine

摘要

A method of controlling and operating at leat one capacitive actuator (Pn) by means of a control circuit (ST), in which the actuator (Pn) is charged with a desired voltage (Us=U1+U2; Usn=U1+U2n) applied to a series-circuit of a charge capacitor (C2) and then discharged into the charge reversing capacitor (C2). The charge reversing capacitor (C2) is charged to a give voltage value (U2,U2n) as the actuator (Pn-1) is discharged, and the remaining residual charge of the actuator (Pn-1) is charged into the charge capacitor (C1), in which n= 1...x.