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    Fuel injector having piezoelectric actuator with preload control element and method
    1.
    发明授权
    Fuel injector having piezoelectric actuator with preload control element and method 失效
    具有预压控制元件和方法的压电致动器的燃油喷射器

    公开(公告)号：US07714483B2

    公开(公告)日：2010-05-11

    申请号：US12077640

    申请日：2008-03-20

    申请人： Amy M. Hess ,  Daniel R. Ibrahim ,  Stephen R. Lewis ,  Jayaraman Venkataraghavan ,  Shriprasad Lakhapati

    发明人： Amy M. Hess ,  Daniel R. Ibrahim ,  Stephen R. Lewis ,  Jayaraman Venkataraghavan ,  Shriprasad Lakhapati

    IPC分类号： H01L41/053 ,  H01L41/083

    CPC分类号： H01L41/0536 ,  F02M47/027 ,  F02M51/0603 ,  F02M61/167 ,  H01L41/083

    摘要： A fuel injector includes a piezoelectric actuator subassembly having a casing and a piezoelectric element disposed within the casing. The piezoelectric element has an operating temperature range and includes a thermally contractive material having a negative thermal expansion coefficient over a second temperature range overlapping with the operating temperature range. A preload control element is coupled with the piezoelectric element and includes a thermally expansive material having a positive thermal expansion coefficient over the second temperature range. The preload control element maintains a constant preload on the piezoelectric element over a wide temperature range to inhibit temperature induced variability in operation, and can axially lengthen in opposition to axial shortening of the piezoelectric element, responsive to a temperature increase.

    摘要翻译： 燃料喷射器包括具有壳体和设置在壳体内的压电元件的压电致动器子组件。 压电元件具有工作温度范围，并且包括在与工作温度范围重叠的第二温度范围内具有负热膨胀系数的热收缩材料。 预压控制元件与压电元件耦合，并且包括在第二温度范围内具有正热膨胀系数的热膨胀材料。 预压控制元件在宽的温度范围内在压电元件上保持恒定的预载荷，以防止温度引起的操作变化，并且可以响应于温度升高而轴向地延长与压电元件的轴向缩短相反。

    Fuel injector having piezoelectric actuator with preload control element and method
    2.
    发明申请
    Fuel injector having piezoelectric actuator with preload control element and method 失效
    具有预压控制元件和方法的压电致动器的燃油喷射器

    公开(公告)号：US20090236441A1

    公开(公告)日：2009-09-24

    申请号：US12077640

    申请日：2008-03-20

    申请人： Amy M. Hess ,  Daniel R. Ibrahim ,  Stephen R. Lewis ,  Jayaraman Venkataraghavan ,  Shriprasad Lakhapati

    发明人： Amy M. Hess ,  Daniel R. Ibrahim ,  Stephen R. Lewis ,  Jayaraman Venkataraghavan ,  Shriprasad Lakhapati

    IPC分类号： B05B1/02

    CPC分类号： H01L41/0536 ,  F02M47/027 ,  F02M51/0603 ,  F02M61/167 ,  H01L41/083

    摘要： A fuel injector includes a piezoelectric actuator subassembly having a casing and a piezoelectric element disposed within the casing. The piezoelectric element has an operating temperature range and includes a thermally contractive material having a negative thermal expansion coefficient over a second temperature range overlapping with the operating temperature range. A preload control element is coupled with the piezoelectric element and includes a thermally expansive material having a positive thermal expansion coefficient over the second temperature range. The preload control element maintains a constant preload on the piezoelectric element over a wide temperature range to inhibit temperature induced variability in operation, and can axially lengthen in opposition to axial shortening of the piezoelectric element, responsive to a temperature increase.

    摘要翻译： 燃料喷射器包括具有壳体和设置在壳体内的压电元件的压电致动器子组件。 压电元件具有工作温度范围，并且包括在与工作温度范围重叠的第二温度范围内具有负热膨胀系数的热收缩材料。 预压控制元件与压电元件耦合，并且包括在第二温度范围内具有正热膨胀系数的热膨胀材料。 预压控制元件在宽的温度范围内在压电元件上保持恒定的预载荷，以防止温度引起的操作变化，并且可以响应于温度升高而轴向地延长与压电元件的轴向缩短相反。

    Engine having fuel injector with actuator cooling system and method
    3.
    发明授权
    Engine having fuel injector with actuator cooling system and method 有权
    具有燃油喷射器的发动机具有致动器冷却系统和方法

    公开(公告)号：US08056537B2

    公开(公告)日：2011-11-15

    申请号：US12286005

    申请日：2008-09-26

    申请人： Jayaraman K. Venkataraghavan ,  Michael C. Long ,  Shriprasad Lakhapati ,  Stephen R. Lewis ,  Amy M. Hess

    发明人： Jayaraman K. Venkataraghavan ,  Michael C. Long ,  Shriprasad Lakhapati ,  Stephen R. Lewis ,  Amy M. Hess

    IPC分类号： F02M69/46

    CPC分类号： F02M47/027 ,  F02M53/04 ,  F02M53/043 ,  F02M2700/077

    摘要： An internal combustion engine, such as a direct injection compression ignition diesel engine, includes an engine housing having a plurality of cylinders and a plurality of fuel injectors associated one with each of the cylinders. The fuel injectors each include a first fuel inlet and a second fuel inlet, and an actuator subassembly which is configured to actuate a control valve assembly positioned within the fuel injector. The engine further includes a fuel system having a fuel supply circuit, and a cooling system for the actuator subassembly having a cooling circuit with a segment in common with a segment of the fuel system. The cooling system is configured to pass cooling fuel across a heat exchange interface of the actuator subassembly to exchange heat therewith. The actuator subassembly may include a piezoelectric actuator and a preloading spring, which are each fluidly sealed within a casing of the actuator subassembly.

    摘要翻译： 诸如直喷式压缩点火柴油发动机的内燃机包括具有多个气缸的发动机壳体和与每个气缸相关联的多个燃料喷射器。 燃料喷射器各自包括第一燃料入口和第二燃料入口，以及致动器子组件，其构造成致动位于燃料喷射器内的控制阀组件。 发动机还包括具有燃料供给回路的燃料系统和用于致动器子组件的冷却系统，该冷却系统具有冷却回路，该冷却回路具有与燃料系统的一部分共同的段。 冷却系统构造成使冷却燃料穿过致动器子组件的热交换界面以与其交换热量。 致动器子组件可以包括压电致动器和预加载弹簧，每个流体密封在致动器子组件的壳体内。

    Engine having fuel injector with actuator cooling system and method
    4.
    发明申请
    Engine having fuel injector with actuator cooling system and method 有权
    具有燃油喷射器的发动机具有致动器冷却系统和方法

    公开(公告)号：US20100077971A1

    公开(公告)日：2010-04-01

    申请号：US12286005

    申请日：2008-09-26

    申请人： Jayaraman K. Venkataraghavan ,  Michael C. Long ,  Shriprasad Lakhapati ,  Stephen R. Lewis ,  Amy M. Hess

    发明人： Jayaraman K. Venkataraghavan ,  Michael C. Long ,  Shriprasad Lakhapati ,  Stephen R. Lewis ,  Amy M. Hess

    IPC分类号： F02M53/04 ,  F02M51/06

    CPC分类号： F02M47/027 ,  F02M53/04 ,  F02M53/043 ,  F02M2700/077

    摘要： An internal combustion engine, such as a direct injection compression ignition diesel engine, includes an engine housing having a plurality of cylinders and a plurality of fuel injectors associated one with each of the cylinders. The fuel injectors each include a first fuel inlet and a second fuel inlet, and an actuator subassembly which is configured to actuate a control valve assembly positioned within the fuel injector. The engine further includes a fuel system having a fuel supply circuit, and a cooling system for the actuator subassembly having a cooling circuit with a segment in common with a segment of the fuel system. The cooling system is configured to pass cooling fuel across a heat exchange interface of the actuator subassembly to exchange heat therewith. The actuator subassembly may include a piezoelectric actuator and a preloading spring, which are each fluidly sealed within a casing of the actuator subassembly.

    摘要翻译： 诸如直喷式压缩点火柴油发动机的内燃机包括具有多个气缸的发动机壳体和与每个气缸相关联的多个燃料喷射器。 燃料喷射器各自包括第一燃料入口和第二燃料入口，以及致动器子组件，其构造成致动位于燃料喷射器内的控制阀组件。 发动机还包括具有燃料供给回路的燃料系统和用于致动器子组件的冷却系统，该冷却系统具有冷却回路，该冷却回路具有与燃料系统的一部分共同的段。 冷却系统构造成使冷却燃料穿过致动器子组件的热交换界面以与其交换热量。 致动器子组件可以包括压电致动器和预加载弹簧，每个流体密封在致动器子组件的壳体内。

    Self-guided armature in single pole solenoid actuator assembly and fuel injector using same
    9.
    发明申请
    Self-guided armature in single pole solenoid actuator assembly and fuel injector using same 有权
    单电磁螺线管执行器组件中的自导电枢和使用其的燃油喷射器

    公开(公告)号：US20100186719A1

    公开(公告)日：2010-07-29

    申请号：US12321809

    申请日：2009-01-26

    申请人： Jayaraman K. Venkataraghavan ,  Stephen R. Lewis ,  Nadeem N. Bunni ,  Shriprasad Lakhapati

    发明人： Jayaraman K. Venkataraghavan ,  Stephen R. Lewis ,  Nadeem N. Bunni ,  Shriprasad Lakhapati

    IPC分类号： F02M51/06 ,  H01F7/08 ,  H01F7/16 ,  F16K31/06

    CPC分类号： F02M47/027 ,  F02M63/0019 ,  F02M63/0024 ,  H01F7/081 ,  H01F7/1638

    摘要： A self-guided armature assembly for a single pole solenoid assembly includes an armature stem and an armature. The solenoid assembly includes a flux ring component and an actuator body. The armature is movable inside the flux ring. An axial air gap is defined between the top armature surface of the armature and a bottom stator surface of a stator assembly. A sliding air gap is defined between an inner diameter surface of the flux ring and an outer diameter surface of the armature. The self-guided armature is guided along the flux ring via a guiding interaction between the armature and the flux ring. The sliding air gap is smaller than the axial air gap. A stem clearance gap is defined between the armature stem and the actuator body. The sliding air gap is also smaller than the stem clearance gap.

    摘要翻译： 用于单极螺线管组件的自导电枢组件包括电枢杆和电枢。 螺线管组件包括磁通环部件和致动器主体。 电枢可在磁通环内移动。 轴向气隙限定在电枢的顶部电枢表面和定子组件的底部定子表面之间。 滑动气隙限定在磁通环的内径表面和电枢的外径表面之间。 自导向电枢通过电枢和磁通环之间的引导相互作用沿磁通环引导。 滑动气隙小于轴向气隙。 在电枢杆和致动器主体之间限定了杆间隙。 滑动气隙也小于阀杆间隙。

    STATOR ASSEMBLY AND FUEL INJECTOR USING SAME
    10.
    发明申请
    STATOR ASSEMBLY AND FUEL INJECTOR USING SAME 审中-公开
    定子组装和燃油喷射器使用相同

    公开(公告)号：US20120061491A1

    公开(公告)日：2012-03-15

    申请号：US13296680

    申请日：2011-11-15

    申请人： Jayaraman K. Venkataraghavan ,  Stephen R. Lewis ,  Shriprasad Lakhapati ,  Avinash R. Manubolu ,  Nadeem N. Bunni

    发明人： Jayaraman K. Venkataraghavan ,  Stephen R. Lewis ,  Shriprasad Lakhapati ,  Avinash R. Manubolu ,  Nadeem N. Bunni

    IPC分类号： F02M51/00 ,  B23P11/00

    CPC分类号： F02M47/027 ,  F02M53/04 ,  F02M53/043 ,  F02M2700/077 ,  Y10T29/49826

    摘要： A fuel injector for a common rail fuel system includes a common rail inlet port fluidly connected to a high pressure common rail, and a cooling inlet fluidly connected to an output from a lower pressure fuel transfer pump. The cooling fluid circulates internally through the fuel injector to cool a single pole solenoid via both internal and peripheral cooling passages. In order to accommodate a small spatial envelope while providing superior performance, a thin insulating layer may separate the solenoid coil winding from an inner pole piece, and small flux gap clearances may permit a flux carrying portion of the injector body to be a portion of the single pole solenoid assembly.

    摘要翻译： 用于共轨燃料系统的燃料喷射器包括流体连接到高压共轨的共轨入口和与低压燃料输送泵的输出流体连接的冷却入口。 冷却流体在内部循环通过燃料喷射器，以通过内部和外部冷却通道冷却单极螺线管。 为了适应小的空间包络，同时提供优异的性能，薄的绝缘层可以将螺线管线圈绕组与内极片分开，并且小的通量间隙间隙可以允许喷射器主体的磁通承载部分是 单极螺线管总成。