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    • 6. 发明授权
    • Method and apparatus for controlling a capacitive actuator
    • 用于控制电容式致动器的方法和装置
    • US06472796B1
    • 2002-10-29
    • US09513623
    • 2000-02-25
    • Christian HoffmannHellmut FreudenbergHartmut GerkenMartin HeckerRichard Pirkl
    • Christian HoffmannHellmut FreudenbergHartmut GerkenMartin HeckerRichard Pirkl
    • H01L4108
    • F02D41/2096F02D41/221H02N2/06H02N2/067
    • A method for controlling a capacitive actuator includes the steps of determining an energy applied to an actuator, measuring an actuator voltage present at the actuator, and inferring a functional state of the actuator by using the energy and the actuator voltage. A capacitive actuator is fed energy and the actuator voltage present at the actuator is measured. The energy and the comparison of the actuator voltage with reference values are used to infer a functional state, for example, either faults or correct function of the actuator or injection valve. Furthermore, the actuator voltage is used to infer an actuator stroke. The method is based on actuator characteristics. The invention also includes a circuit for controlling a capacitive actuator having a driving circuit with a main switch, a charging capacitor, a first series circuit including an oscillating coil, an auxiliary switch, and a second series circuit having a discharging switch, a charging switch, and a diode to be connected to the actuator, and a control device having a program and a family of characteristics with actuator characteristics defining characteristic curves, reference values, and correction factors.
    • 用于控制电容式致动器的方法包括以下步骤:确定施加到致动器的能量,测量致动器处存在的致动器电压,以及通过使用能量和致动器电压来推断致动器的功能状态。 电容式致动器被馈送能量,并且测量致动器处存在的致动器电压。 使用致动器电压和参考值的能量和比较来推断功能状态,例如故障或致动器或喷射阀的正确功能。 此外,致动器电压用于推断致动器行程。 该方法基于执行器特性。 本发明还包括用于控制具有主开关的驱动电路的电容式致动器的电路,充电电容器,包括振荡线圈的第一串联电路,辅助开关和具有放电开关的第二串联电路,充电开关 以及要连接到致动器的二极管,以及具有程序和特征族的控制装置,具有定义特性曲线,参考值和校正因子的致动器特性。