Method and device for driving a capacitive control element
    2.
    发明授权
    Method and device for driving a capacitive control element 有权
    用于驱动电容控制元件的方法和装置

    公开(公告)号:US6121715A

    公开(公告)日:2000-09-19

    申请号:US335562

    申请日:1999-06-18

    摘要: A capacitive control element is charged with a defined charging voltage Uc. From a stored mapping KF, the instantaneous control element capacitance Cp is determined from the charge voltage Uc and a control element voltage Up. In addition, energy E supplied to the control element is determined from the charge voltage Uc and the control element capacitance Cp. According to a deviation of energy E fed to the control element from a stipulated amount of energy Ev, the charge voltage Uc for a next drive process of the control element is regulated. The same process occurs for additional control elements.

    摘要翻译: 电容性控制元件用定义的充电电压Uc充电。 从存储的映射KF中,根据充电电压Uc和控制元件电压Up确定瞬时控制元件电容Cp。 此外,从充电电压Uc和控制元件电容Cp确定提供给控制元件的能量E。 根据从规定的能量Ev供给到控制元件的能量E的偏差,调节控制元件的下一个驱动处理的充电电压Uc。 对于其他控制元素也会发生相同的过程。

    Discharge circuit for a capacitive actuator
    10.
    发明授权
    Discharge circuit for a capacitive actuator 有权
    用于电容式驱动器的放电电路

    公开(公告)号:US06333585B1

    公开(公告)日:2001-12-25

    申请号:US09555019

    申请日:2000-08-15

    IPC分类号: H01L4108

    CPC分类号: H02N2/067 F02D41/2096

    摘要: A capacitive actuator (P), especially for a piezoelectrically operated injection valve for an internal combustion engine, is short-circuited by a discharge switch (M) after an actuation, the controlling input of the discharge switch (M) being connected to the actuator (P) so that the discharge switch (M) in case of a failure of the external control, is automatically rendered conductive by the actuator voltage (UP) and the actuator (P) is therefore automatically discharged.

    摘要翻译: 特别是用于内燃机的压电操作的喷射阀的电容式致动器(P)在致动之后被放电开关(M)短路,放电开关(M)的控制输入端连接到致动器 (P),使得在外部控制失败的情况下的放电开关(M)由致动器电压(UP)自动导通,并且致动器(P)因此被自动放电。