Method for improving the long-term stability of a piezoelectric actuator and a piezoelectric actuator
    1.
    发明授权
    Method for improving the long-term stability of a piezoelectric actuator and a piezoelectric actuator 有权
    一种用于改善压电致动器和压电致动器的长期稳定性的方法

    公开(公告)号:US07218037B2

    公开(公告)日:2007-05-15

    申请号:US11189334

    申请日:2005-07-26

    IPC分类号: H01L41/053

    CPC分类号: H01L41/0533

    摘要: A method is described for improving the long-term stability of a piezoelectric actuator encased in a potting compound containing or forming hydrogen atoms. Oxygen is contained in the piezoelectric actuator's piezoelectric ceramic. Appropriate means are employed so that unsaturated bonds of the hydrogen in the potting compound will release less oxygen from the piezoelectric ceramic. One means consists in reducing the concentration of hydrogen in the potting compound, with appropriate thermal processes as a result of which the concentration of hydrogen will be reduced to below a predefined threshold being applied after the piezoelectric actuator has been encased in the potting compound. Means that form bonds with the hydrogen in the potting compound or duct oxygen thereto are provided in further embodiments.

    摘要翻译: 描述了一种用于改善封装在含有或形成氢原子的封装化合物中的压电致动器的长期稳定性的方法。 氧气被包含在压电致动器的压电陶瓷中。 使用合适的方法,使得灌封化合物中的氢的不饱和键将从压电陶瓷释放更少的氧。 一种手段在于通过适当的热处理来降低灌封化合物中的氢浓度,由此在将压电致动器封装在灌封化合物中之后,氢的浓度将降低到低于预定阈值。 在另外的实施方案中提供了与灌封化合物中的氢形成键或其导管氧的方式。

    Actuator for Actuating a Fuel Injection Valve
    3.
    发明申请
    Actuator for Actuating a Fuel Injection Valve 有权
    用于启动燃油喷射阀的执行器

    公开(公告)号:US20080149070A1

    公开(公告)日:2008-06-26

    申请号:US11813340

    申请日:2005-11-25

    IPC分类号: F02M51/00

    摘要: An actuator for actuating a fuel injection valve has a piezoactuator, enclosed in an actuator housing unit (14, 16). The housing unit has a cylindrical actuator housing (14) which is elongate in its axial direction (A) and at least partially encased by an extruded plastic coat. The actuator housing unit (14, 16), in its encased area, is provided with a ventilation aperture (20) in which a ventilation element (22) produced from a microporous material is disposed.

    摘要翻译: 用于致动燃料喷射阀的致动器具有封闭在致动器壳体单元(14,16)中的压电致动器。 壳体单元具有圆柱形致动器壳体(14),其在其轴向(A)上是细长的,并且至少部分地被挤出的塑料涂层包裹。 在其封装区域中的致动器壳体单元(14,16)设置有通风孔(20),其中设置由微孔材料制成的通风元件(22)。

    Actuator for actuating a fuel injection valve
    4.
    发明授权
    Actuator for actuating a fuel injection valve 有权
    用于致动燃料喷射阀的致动器

    公开(公告)号:US07906888B2

    公开(公告)日:2011-03-15

    申请号:US11813340

    申请日:2005-11-25

    IPC分类号: H01L41/08

    摘要: An actuator for actuating a fuel injection valve has a piezoactuator, enclosed in an actuator housing unit (14, 16). The housing unit has a cylindrical actuator housing (14) which is elongate in its axial direction (A) and at least partially encased by an extruded plastic coat. The actuator housing unit (14, 16), in its encased area, is provided with a ventilation aperture (20) in which a ventilation element (22) produced from a microporous material is disposed.

    摘要翻译: 用于致动燃料喷射阀的致动器具有封闭在致动器壳体单元(14,16)中的压电致动器。 壳体单元具有圆柱形致动器壳体(14),其在其轴向(A)上是细长的,并且至少部分地被挤出的塑料涂层包裹。 在其封装区域中的致动器壳体单元(14,16)设置有通风孔(20),其中设置由微孔材料制成的通风元件(22)。

    Piezoelectric actuator for a servo drive, servo drive with a piezoelectric actuator and method of producing a piezoelectric actuator
    8.
    发明授权
    Piezoelectric actuator for a servo drive, servo drive with a piezoelectric actuator and method of producing a piezoelectric actuator 失效
    用于伺服驱动器的压电致动器,具有压电致动器的伺服驱动器以及产生压电致动器的方法

    公开(公告)号:US06274967B1

    公开(公告)日:2001-08-14

    申请号:US09296227

    申请日:1999-04-22

    IPC分类号: H01L4108

    摘要: A servo drive includes a piezoelectric actuator contained in a drive housing. The actuator has an actuator stack surrounded by a hollow cylindrical spring element and an actuator casing disposed in the spring element. The spring element is clamped, together with the actuator stack, between an actuator cap and an actuator base. An elastic compound fills gaps between the drive housing and the spring element as well as between the spring element and the actuator casing, and damps an actuator motion. A piezoelectric actuator for the servo drive and a method of producing the piezoelectric actuator are also provided.

    摘要翻译: 伺服驱动器包括驱动器壳体内的压电致动器。 致动器具有由中空圆柱形弹簧元件围绕的致动器堆叠和设置在弹簧元件中的致动器壳体。 弹簧元件与致动器堆叠一起夹在致动器盖和致动器基座之间。 弹性组合物填充驱动壳体和弹簧元件之间以及弹簧元件和致动器壳体之间的间隙,并且阻止致动器运动。 还提供了用于伺服驱动器的压电致动器和制造压电致动器的方法。

    Method for producing a tubular spring and an actuator unit comprising one such tubular spring
    9.
    发明授权
    Method for producing a tubular spring and an actuator unit comprising one such tubular spring 有权
    用于制造管状弹簧的方法和包括一个这种管状弹簧的致动器单元

    公开(公告)号:US07222424B2

    公开(公告)日:2007-05-29

    申请号:US10821775

    申请日:2004-04-09

    IPC分类号: B23P15/16 B21D51/16

    摘要: A method for producing a tubular spring (12) in the form of a cylindrical hollow body, especially for pre-tensioning a piezoelectric actuator element (2) of an actuator unit (1) of a fuel injector comprises the step of providing a thin-walled, solid-drawn steel tube with a plurality of regularly arranged longish recesses (14) by means of laser cutting. Thus, an actuator unit (1) comprises a piezoelectric actuator element (2) which is arranged in a thin-walled cylindrical hollow body, wherein the hollow body being elastically embodied and pre-tensioning the actuator element (2). Furthermore, the hollow body is a solid-drawn steel tube which is provided with a plurality of longish recesses (14).

    摘要翻译: 用于制造圆柱形中空体形式的管状弹簧(12)的方法,特别是用于预紧燃料喷射器的致动器单元(1)的压电致动器元件(2)的方法,包括: 通过激光切割具有多个规则排列的较深的凹槽(14)的带壁的固体拉伸钢管。 因此,致动器单元(1)包括布置在薄壁圆柱形空心体中的压电致动器元件(2),其中中空体弹性地实施并且预张紧致动元件(2)。 此外,中空体是设置有多个较长凹部(14)的固体拉伸钢管。