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61. 发明申请

US20090236441A1 Fuel injector having piezoelectric actuator with preload control element and method 失效
标题翻译：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。

62. 发明授权

US07584747B1 Cam assisted common rail fuel system and engine using same 有权
标题翻译：凸轮辅助共轨燃油系统和发动机使用相同
公开(公告)号：US07584747B1
公开(公告)日：2009-09-08
申请号：US12079292
申请日：2008-03-26
申请人： Daniel R. Ibrahim , Stephen R. Lewis
发明人： Daniel R. Ibrahim , Stephen R. Lewis
IPC分类号： F02M69/46 , F02M69/50
CPC分类号： F02M47/027 , F02M59/102 , F02M63/0015 , F02M63/0045 , F02M63/0049 , F02M63/0064 , F02M63/029
摘要： A fuel system for an internal combustion engine includes a plurality of nozzle groups and a plurality of pump groups. A common rail is fluidly connected with each of the nozzle groups, and each of the pump groups includes a mechanically actuated pressure intensifier having a tappet which can selectively intensify a fuel injection pressure in a corresponding one of the nozzle groups. Each of the mechanically actuated pressure intensifiers is movable in response to rotation of a cam, and includes a spill valve having a first position at which fuel is displaced from the pump group to a low pressure space and a second position at which fuel is displaced to a corresponding one of the nozzle groups.
摘要翻译：用于内燃机的燃料系统包括多个喷嘴组和多个泵组。公共轨道与每个喷嘴组流体连接，并且每个泵组包括机械致动的压力增压器，其具有挺杆，该挺杆可选择性地加强相应的一个喷嘴组中的燃料喷射压力。每个机械致动的增压器可响应于凸轮的旋转而是可移动的，并且包括溢流阀，该溢流阀具有第一位置，在该第一位置，燃料从泵组移位到低压空间，第二位置将燃料移位到相应的一个喷嘴组。

63. 发明申请

US20090184185A1 FUEL INJECTOR AND METHOD OF ASSEMBLY THEREFOR 有权
标题翻译：燃油喷射器及其组装方法
公开(公告)号：US20090184185A1
公开(公告)日：2009-07-23
申请号：US12018322
申请日：2008-01-23
申请人： Stephen R. Lewis , Shriprasad Lakhapati , Christopher D. Hanson , Avinash Manubolu , Daniel R. Ibrahim
发明人： Stephen R. Lewis , Shriprasad Lakhapati , Christopher D. Hanson , Avinash Manubolu , Daniel R. Ibrahim
IPC分类号： F02M51/06 , B23P17/00
CPC分类号： F02M61/168 , F02M47/027 , F02M2200/28 , F02M2200/80 , Y10T29/49412 , Y10T29/53
摘要： A fuel injector and a method of assembly includes a determination of various flow areas through clearances or openings formed in various components of the injector. With the various flow areas determined, the various components can be classified according to their flow areas such that sets of components can be selected having desirable flow area characteristics for assembly of the fuel injector.
摘要翻译：燃料喷射器和组装方法包括通过在喷射器的各种部件中形成的间隙或开口来确定各种流动区域。在确定了各种流动区域的情况下，各种部件可以根据它们的流动区域进行分类，使得可以选择具有用于组装燃料喷射器的理想流动面积特性的部件组。

64. 发明申请

US20090140610A1 System for preloading piezoelectric actuators and method 失效
标题翻译：压电致动器预压系统及方法
公开(公告)号：US20090140610A1
公开(公告)日：2009-06-04
申请号：US11998531
申请日：2007-11-30
申请人： Jayaraman Venkataraghavan , Stephen R. Lewis , William Love , Zhenlong Xu
发明人： Jayaraman Venkataraghavan , Stephen R. Lewis , William Love , Zhenlong Xu
IPC分类号： G01L1/00 , G01L1/16 , H01L41/113
CPC分类号： H01L41/0533 , F02M2200/21 , H01L41/083 , Y10T29/42
摘要： A system for preloading piezoelectric actuators includes a fixture, a preloading mechanism configured to apply a mechanical force to a piezoelectric element supported by the fixture, and a sensor configured to sense an electrical property induced by the mechanical force in an electrical circuit having the piezoelectric element therein. A control device is coupled with the sensor and configured to generate a signal based on the sensed electrical property. A method of setting or testing preload includes applying a mechanical force to a piezoelectric element, and correlating an electrical property induced by the mechanical force with a magnitude of the mechanical force. Closed loop control allows preload to be set highly accurately.
摘要翻译：一种用于预压压电致动器的系统包括：固定装置，被配置为对由固定装置支撑的压电元件施加机械力的预加载机构;以及传感器，其构造成感测由具有压电元件的电路中的机械力引起的电特性其中。控制装置与传感器耦合并被配置为基于感测到的电气特性产生信号。设置或测试预载荷的方法包括对压电元件施加机械力，并将由机械力引起的电特性与机械力的大小相关联。闭环控制允许高精度地设定预载荷。

65. 发明授权

US4891645A Digital-to-analog converter with on-board unity gain inverting amplifier 失效
标题翻译：具有板上单位增益反相放大器的数模转换器
公开(公告)号：US4891645A
公开(公告)日：1990-01-02
申请号：US253072
申请日：1988-10-04
申请人： Stephen R. Lewis , Scott A. Lefton
发明人： Stephen R. Lewis , Scott A. Lefton
IPC分类号： H03M1/06 , H03M1/08 , H03M1/10 , H03M1/78
CPC分类号： H03M1/089 , H03M1/1061 , H03M1/785
摘要： The invention provides a monolithic Y-bit resistive-ladder type digital-to-analog converter (DAC) having a unity gain inverting operational amplifier as an input buffer to the resistive ladder segment of the DAC. The reference voltage is applied to the input buffer amplifier. Optional bipolar operation is provided by applying a non-inverted reference voltage to the output of the resistive ladder segment of the DAC through a scaled resistance. Analog ground current cancellation is provided by a secondary X-bit R-2R ladder (where X Y) with the non-inverted reference voltage applied to it. The secondary bit ladder is switched in parallel with the top X bits of the main ladder, thereby supplying or sinking roughly the same amount of current as the X most significant bits of the main resistive ladder, but with opposite sense. The effect on the DAC output of the resistance and temperature coefficient of the switches used in the R-2R ladder and elsewhere in the circuitry is minimized by selecting switches appropriately scaled to provide resistances whose sum effect is to cancel each other out. (Particularly, a FET switch biased permanently on is provided at the input of the unity gain inverting operational amplifier.) Since the DAC is monolithic, the switches have approximately equal temperature coefficients such that the effect of the switches is consistent at all temperatures.
摘要翻译：本发明提供了具有单位增益反相运算放大器作为DAC的电阻梯形段的输入缓冲器的单片Y位电阻梯型数模转换器（DAC）。参考电压被施加到输入缓冲放大器。通过按比例的电阻将不反转的参考电压施加到DAC的电阻梯形段的输出端来提供可选的双极性操作。模拟地电流消除由施加了非反相参考电压的次级X位R-2R梯形（其中X Y）提供。次级梯形图与主梯的顶部X位并行切换，从而提供或吸收与主电阻梯的X个最高有效位大致相同的电流，但具有相反的意义。通过选择适当缩放的开关来提供R-2R梯形图和电路中其他地方使用的开关的电阻和温度系数对DAC输出的影响，以提供总和效应相互抵消的电阻。（特别地，在单位增益反相运算放大器的输入处提供了永久置位的FET开关。）由于DAC是单片的，所以开关具有大致相等的温度系数，使得开关的效果在所有温度下是一致的。

66. 发明授权

US4791318A MOS threshold control circuit 失效
标题翻译： MOS门限控制电路
公开(公告)号：US4791318A
公开(公告)日：1988-12-13
申请号：US132984
申请日：1987-12-15
申请人： Stephen R. Lewis , Scott Lefton
发明人： Stephen R. Lewis , Scott Lefton
IPC分类号： H03K19/003 , H03K17/30
CPC分类号： H03K19/00384
摘要： A circuit for controlling the circuit thresholds on an MOS integrated circuit takes advantage of the fact that all MOS devices of a particular type on the same chip have nearly identical characteristics. The circuit thresholds are varied by applying a control voltage to the back gate of an MOS device in each stage to be controlled. The control voltage is generated in a reference stage which utilizes a feedback loop to servo the back gate voltage of an MOS transistor in the loop. A reference voltage equal to the desired circuit threshold votlage is applied to the input of the reference stage. The reference voltage and the reference stage output are applied to an amplifier in the feedback loop. The amplifier applies to the back gate of the MOS transistor in the reference stage a control voltage that tends to equalize or establish a desired offset between the reference voltage and the reference stage output. The control voltage applied to the reference stage back gate is coupled to the back gate of the MOS transistor in each operating stage. The threshold control circuit is particularly useful in CMOS circuits, but can be utilized in any MOS circuit having an MOS transistor with an accessible back gate.
摘要翻译：用于控制MOS集成电路上的电路阈值的电路利用了同一芯片上的特定类型的所有MOS器件具有几乎相同的特性的事实。通过在要控制的每个级中的MOS器件的背栅上施加控制电压来改变电路阈值。控制电压在参考级中产生，该参考级利用反馈回路来伺服回路中的MOS晶体管的背栅极电压。将等于所需电路阈值投票的参考电压施加到参考级的输入端。参考电压和参考级输出被施加到反馈回路中的放大器。该放大器在参考级中施加到MOS晶体管的背栅极，该控制电压倾向于均衡或建立参考电压和参考级输出之间的期望偏移。施加到参考级背栅的控制电压在每个操作级耦合到MOS晶体管的背栅。阈值控制电路在CMOS电路中特别有用，但可以用于具有可访问后门的MOS晶体管的任何MOS电路中。

67. 发明申请

US20120320113A1 DIRECT-VIEW MEMS DISPLAY DEVICES AND METHODS FOR GENERATING IMAGES THEREON 审中-公开
公开(公告)号：US20120320113A1
公开(公告)日：2012-12-20
申请号：US13597983
申请日：2012-08-29
申请人： Nesbitt W. Hagood, IV , Jignesh Gandhi , Abraham McAllister , Rainer M. Malzbender , Stephen R. Lewis
发明人： Nesbitt W. Hagood, IV , Jignesh Gandhi , Abraham McAllister , Rainer M. Malzbender , Stephen R. Lewis
IPC分类号： G09G5/10
CPC分类号： G09G3/346 , G02B26/004 , G02B26/02 , G09G3/2003 , G09G3/2022 , G09G3/2081 , G09G3/3413 , G09G5/06 , G09G5/363 , G09G5/393 , G09G2300/0809 , G09G2310/0235 , G09G2310/0251 , G09G2310/08 , G09G2320/0247 , G09G2320/064 , G09G2320/066 , G09G2330/021 , G09G2360/144
摘要： A direct-view display includes an array of MEMS light modulators and a control matrix formed on a transparent substrate, where each light modulator can be driven into at least two states, and a controller for controlling the states of each light modulator in the array. The control matrix transmits data and actuation voltages to the array. The controller includes an input, a processor, a memory, and an output. The input receives image data encoding an image frame for display. The processor derives a plurality of sub-frame data sets from the image data, where each sub-frame data set indicates desired states of light modulators in multiple rows and multiple columns of the array. The memory stores the plurality of sub-frame data sets. The output outputs the plurality of sub-frame data sets according to an output sequence to drive light modulators into the states indicated in the sub-frame data sets.

68. 发明申请

US20120320111A1 DIRECT-VIEW MEMS DISPLAY DEVICES AND METHODS FOR GENERATING IMAGES THEREON 有权
标题翻译：直观的MEMS显示设备及其生成图像的方法
公开(公告)号：US20120320111A1
公开(公告)日：2012-12-20
申请号：US13597943
申请日：2012-08-29
申请人： Nesbitt W. Hagood, IV , Jignesh Gandhi , Abraham McAllister , Rainer M. Malzbender , Stephen R. Lewis
发明人： Nesbitt W. Hagood, IV , Jignesh Gandhi , Abraham McAllister , Rainer M. Malzbender , Stephen R. Lewis
IPC分类号： G09G5/10
CPC分类号： G09G3/346 , G02B26/004 , G02B26/02 , G09G3/2003 , G09G3/2022 , G09G3/2081 , G09G3/3413 , G09G5/06 , G09G5/363 , G09G5/393 , G09G2300/0809 , G09G2310/0235 , G09G2310/0251 , G09G2310/08 , G09G2320/0247 , G09G2320/064 , G09G2320/066 , G09G2330/021 , G09G2360/144
摘要： A direct-view display includes an array of MEMS light modulators and a control matrix formed on a transparent substrate, where each light modulator can be driven into at least two states, and a controller for controlling the states of each light modulator in the array. The control matrix transmits data and actuation voltages to the array. The controller includes an input, a processor, a memory, and an output. The input receives image data encoding an image frame for display. The processor derives a plurality of sub-frame data sets from the image data, where each sub-frame data set indicates desired states of light modulators in multiple rows and multiple columns of the array. The memory stores the plurality of sub-frame data sets. The output outputs the plurality of sub-frame data sets according to an output sequence to drive light modulators into the states indicated in the sub-frame data sets.
摘要翻译：直视图显示器包括MEMS光调制器的阵列和形成在透明基板上的控制矩阵，其中每个光调制器可以被驱动至少两种状态;以及控制器，用于控制阵列中每个光调制器的状态。控制矩阵将数据和致动电压传输到阵列。控制器包括输入，处理器，存储器和输出。该输入接收用于显示的图像帧的编码图像数据。处理器从图像数据中导出多个子帧数据集，其中每个子帧数据集指示阵列的多行和多列的光调制器的期望状态。存储器存储多个子帧数据集。输出根据输出序列输出多个子帧数据组，以驱动光调制器进入子帧数据集中指示的状态。

69. 发明授权

US08267333B2 Fuel injector and method of assembly therefor 有权
标题翻译：燃油喷射器及其组装方法
公开(公告)号：US08267333B2
公开(公告)日：2012-09-18
申请号：US13036881
申请日：2011-02-28
申请人： Stephen R. Lewis , Shriprasad Lakhapati , Christopher D. Hanson , Avinash Manubolu , Daniel R. Ibrahim
发明人： Stephen R. Lewis , Shriprasad Lakhapati , Christopher D. Hanson , Avinash Manubolu , Daniel R. Ibrahim
IPC分类号： F02M47/02 , F02M61/20 , F02M61/18 , F02M61/12 , F02M61/10
CPC分类号： F02M61/168 , F02M47/027 , F02M2200/28 , F02M2200/80 , Y10T29/49412 , Y10T29/53
摘要： A fuel injector and a method of assembly includes a determination of various flow areas through clearances or openings formed in various components of the injector. With the various flow areas determined, the various components can be classified according to their flow areas such that sets of components can be selected having desirable flow area characteristics for assembly of the fuel injector.
摘要翻译：燃料喷射器和组装方法包括通过在喷射器的各种部件中形成的间隙或开口来确定各种流动区域。在确定了各种流动区域的情况下，各种部件可以根据它们的流动区域进行分类，使得可以选择具有用于组装燃料喷射器的理想流动面积特性的部件组。

70. 发明授权

US08056537B2 Engine having fuel injector with actuator cooling system and method 有权
标题翻译：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。

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