公开(公告)号：US06880332B2

公开(公告)日：2005-04-19

申请号：US10254397

申请日：2002-09-25

申请人： Joseph L. Pfaff ,  Keith A. Tabor

发明人： Joseph L. Pfaff ,  Keith A. Tabor

IPC分类号： G05D7/06 ,  F15B11/00 ,  F15B21/08 ,  F15B13/04 ,  F16D31/02

CPC分类号： F15B21/087 ,  F15B11/006 ,  F15B21/082 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6653 ,  F15B2211/7053 ,  F15B2211/75 ,  F15B2211/88

摘要： The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time. The metering mode to use in selected in response to the hydraulic load that acts on the valve associated with the hydraulic actuator. Specifically the load is determined and then compared to threshold levels associated with the different metering modes to choose the metering mode for use a given point in time.

摘要翻译： 流体到液压致动器的流动由在不同时间点以不同计量模式操作的阀组件来控制。 响应于作用在与液压致动器相关联的阀的液压负载而选择的测量模式。 具体地，确定负载，然后与与不同测光模式相关联的阈值水平进行比较，以选择使用给定时间点的测光模式。

公开(公告)号：US06640163B1

公开(公告)日：2003-10-28

申请号：US10260893

申请日：2002-09-30

申请人： Joseph L. Pfaff ,  Robert J. Willard

发明人： Joseph L. Pfaff ,  Robert J. Willard

IPC分类号： G05D1102

CPC分类号： G05B19/05 ,  G05B2219/1106 ,  Y02P90/265

摘要： A programmable controller, for operating a machine such as one having a hydraulic system, includes a memory that stores a plurality of software function routines. A memory contains a first data file with address pointers to the function routines where the address pointers are listed in the order that the function routines may be executed. A second data file has a separate record associated with each of the address pointers and each record identifies the data variables required by the corresponding function routine. A third data file contains information about each of the variables. A code sequencer accesses the first data file and directs execution of the function routine in the order designated by the pointers. As each function routine executes, the respective record in the second data file is used to access the required variable information.

摘要翻译： 用于操作诸如具有液压系统的机器的可编程控制器包括存储多个软件功能程序的存储器。 存储器包含具有地址指针的函数例程的第一数据文件，其中以可执行函数例程的顺序列出地址指针。 第二数据文件具有与每个地址指针相关联的单独记录，并且每个记录标识相应功能程序所需的数据变量。 第三个数据文件包含有关每个变量的信息。 代码序列器访问第一个数据文件，并以指针指定的顺序指示函数例程的执行。 随着每个功能例程的执行，第二数据文件中的相应记录被用于访问所需的变量信息。

公开(公告)号：US06170241B2

公开(公告)日：2001-01-09

申请号：US08846068

申请日：1997-04-25

申请人： John Shibilski ,  James B. Farr ,  Joseph L. Pfaff

发明人： John Shibilski ,  James B. Farr ,  Joseph L. Pfaff

IPC分类号： A01D3478

CPC分类号： H02H7/0833 ,  H02P29/02

摘要： A solid motor controller for controlling the current in an electrical motor. The motor controller includes a processing unit, and a solid state switch operatively connected to the electrical motor. The motor controller senses the current through the motor, compares the current with a reference current level, and limits the current in the motor by rapidly switching the switch between an ON and an OFF state when the current exceeds the reference current level. The controller de-energizes the motor by placing the switch in the OFF state when the current exceeds the reference current for a predetermined period of time. The controller also includes a second solid state switch which is controlled to rapidly stop the rotation of the motor. The motor controller also activates a high current warning when the current exceeds a high current limit. Further, the motor controller senses the battery voltage, provides a low voltage warning indication when the battery voltage falls below a predetermined value, and shuts down the motor when the battery voltage falls below a second predetermined value. Finally, the controller measures the temperature near a selected component and shuts down the motor when the temperature exceeds a predetermined value.

摘要翻译： 用于控制电动机中的电流的实心电动机控制器。 电动机控制器包括处理单元和可操作地连接到电动机的固态开关。 电机控制器通过电机检测电流，将电流与参考电流电平进行比较，当电流超过参考电流电平时，通过快速切换开关在ON和OFF状态之间限制电机中的电流。 当电流超过参考电流一段预定时间时，控制器将开关置于OFF状态，使电动机断电。 控制器还包括第二固态开关，其被控制以快速停止电动机的旋转。 当电流超过高电流限制时，电机控制器也会激活高电流警告。 此外，电动机控制器感测电池电压，当电池电压低于预定值时提供低电压警告指示，并且当电池电压低于第二预定值时关闭电动机。 最后，控制器测量选定部件附近的温度，并在温度超过预定值时关闭电机。

公开(公告)号：US5445014A

公开(公告)日：1995-08-29

申请号：US289907

申请日：1994-08-12

申请人： John A. Fiorenza, II ,  Richard A. Dykstra ,  Joseph L. Pfaff ,  Scott L. Wesenberg ,  Douglas Shears

发明人： John A. Fiorenza, II ,  Richard A. Dykstra ,  Joseph L. Pfaff ,  Scott L. Wesenberg ,  Douglas Shears

IPC分类号： F02P5/15 ,  F02B63/02 ,  F02B75/02 ,  F02D45/00 ,  G01M15/04 ,  G01L3/26

CPC分类号： F02B63/02 ,  G01M15/046 ,  F02B2075/027 ,  F02D2200/1015

摘要： The device automatically determines whether a load is being applied to the engine, and outputs a change signal that is used to change one or more engine operating parameters accordingly, such as engine speed, engine timing, or fuel flow. The load is sensed without using a manifold pressure or throttle plate position sensor, thereby reducing the cost of the system. The load is sensed by determining a period of a first crankshaft revolution, determining a period of the successive second crankshaft revolution, and computing a difference value that is a function of the difference between the first and second periods. Since the difference value is proportional to engine load, the difference values may be compared with a reference value to determine whether a load is being applied to the engine. The reference value may be preset, may be manually determined by the operator, or may be learned by the system's software. When the learning feature is used, the system is automatically mapped to the particular engine on which it is used.

摘要翻译： 设备自动地确定负载是否被施加到发动机，并且输出用于相应地改变一个或多个发动机操作参数的变化信号，例如发动机转速，发动机正时或燃料流量。 在不使用歧管压力或节流板位置传感器的情况下感测负载，从而降低系统的成本。 通过确定第一曲轴旋转的周期，确定连续的第二曲轴旋转的周期以及计算作为第一和第二周期之间的差的函数的差值来感测负载。 由于差值与发动机负荷成正比，可以将差值与参考值进行比较，以确定负载是否被施加到发动机。 可以预设参考值，可以由操作者手动确定，也可以由系统的软件学习。 当使用学习功能时，系统会自动映射到使用它的特定引擎。

公开(公告)号：US07905088B2

公开(公告)日：2011-03-15

申请号：US11939861

申请日：2007-11-14

申请人： Dwight B. Stephenson ,  Eric P. Hamkins ,  Joseph L. Pfaff ,  Keith A. Tabor

发明人： Dwight B. Stephenson ,  Eric P. Hamkins ,  Joseph L. Pfaff ,  Keith A. Tabor

IPC分类号： F16D31/02

CPC分类号： F15B11/006 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/024 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/625 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7128 ,  F15B2211/88

摘要： A hydraulic system has a valve assembly with two workports coupled to chambers of first and second cylinders which are connected mechanically in parallel to a machine component. A separation control valve is connected between first chambers of both cylinders, and a shunt control valve is connected between the workports. A recovery control valve couples an accumulator to the first chamber of the second cylinder. Opening and closing the valves in different combinations routes fluid from one or both cylinders into the accumulator where the fluid is stored under pressure, and thereafter enables stored fluid to be used to power one or both cylinders. The shunt control valve is used to route fluid exhausting from one chamber of each cylinder to the other chambers of those cylinders. Thus the hydraulic system recovers and reuses energy in various manners.

摘要翻译： 液压系统具有阀组件，其具有联接到第一和第二气缸的室的两个工作端口，其与机器部件机械并联连接。 分离控制阀连接在两个气缸的第一腔室之间，分流控制阀连接在工作口之间。 恢复控制阀将蓄能器连接到第二气缸的第一室。 以不同组合打开和关闭阀门将流体从一个或两个气缸引导到储存器中，其中流体在压力下储存，然后使得存储的流体能够用于为一个或两个气缸供电。 分流控制阀用于将每个气缸的一个室的流体排出物引导到这些气缸的其他室。 因此，液压系统以各种方式恢复和再利用能量。

公开(公告)号：US20100155633A1

公开(公告)日：2010-06-24

申请号：US12619204

申请日：2009-11-16

申请人： Joseph L. Pfaff

发明人： Joseph L. Pfaff

IPC分类号： F16K31/36 ,  F16K31/12 ,  F15B13/01

CPC分类号： F16K31/406 ,  F15B13/0405 ,  F15B13/0433 ,  Y10T137/7764

摘要： A control valve includes a main poppet that moves in response to pressure in a primary control chamber and thereby controls the flow of fluid through a valve seat between first and second ports. A passageway extends between the second port and the primary control chamber and includes a variable flow restriction that decreases as the main poppet moves away from the valve seat. An electrohydraulic pilot valve has a pilot poppet which controls fluid flow from the primary control chamber to the first port in response to pressure in a pilot control chamber. A sub-pilot valve selectively releases pressure in the pilot control chamber to operate the pilot poppet to open and close a path between the inlet and the outlet. Using an electrohydraulic pilot valve enables the main poppet to operate quickly in controlling large fluid flow rates. Unidirectional and bidirectional versions of the control valve are described.

摘要翻译： 控制阀包括响应于主控制室中的压力移动的主提升阀，从而控制通过第一和第二端口之间的阀座的流体流动。 通道在第二端口和主控制室之间延伸并且包括当主提升阀远离阀座移动时减小的可变流量限制。 电液导阀具有先导提升阀，其控制响应于先导控制室中的压力从主控制室到第一端口的流体流动。 副先导阀选择性地释放先导控制室中的压力以操作先导提升阀以打开和关闭入口和出口之间的路径。 使用电液导阀使主提升阀能够快速地操作以控制大的流体流速。 描述了控制阀的单向和双向版本。

公开(公告)号：US20090212244A1

公开(公告)日：2009-08-27

申请号：US12037558

申请日：2008-02-26

申请人： Joseph L. Pfaff ,  Gennady Shimelfarb ,  Christopher E. Lentz

发明人： Joseph L. Pfaff ,  Gennady Shimelfarb ,  Christopher E. Lentz

IPC分类号： F16K31/12 ,  G05D16/20 ,  F16K31/40 ,  F15B13/04

CPC分类号： F15B13/0405 ,  F15B11/006 ,  F15B13/0433 ,  F16K31/0648 ,  F16K31/124 ,  F16K31/406 ,  G05D7/0635 ,  Y10T137/5109 ,  Y10T137/777

摘要： A pilot-operated valve has a main poppet controlling fluid flow between inlet and outlet ports in response to pressure in a control chamber. Fluid flow through a pilot passage, linking the control chamber and the outlet port, moves an exhaust spool between first and second positions to control fluid flow through passages in the main poppet. The first position blocks flow between the control chamber and the outlet port and provides a path between the control chamber and the inlet port. In the second position, flow between the control chamber and the outlet port is enabled, and a second path, that is more restricted than the first path, is provided between the control chamber and the inlet port. When the valve closes, flow through the first path allows movement of the main poppet at a faster rate than during opening when flow occurs through the more restricted second path.

摘要翻译： 先导操作的阀具有响应于控制室中的压力而在入口和出口之间控制流体流的主提升阀。 通过连接控制室和出口的先导通道的流体流动使排气卷轴在第一和第二位置之间移动，以控制通过主提升阀中的通道的流体流动。 第一位置阻挡在控制室和出口之间的流动并且提供控制室和入口之间的路径。 在第二位置，控制室和出口之间的流动是可以实现的，并且在控制室和入口之间提供比第一路径更受限制的第二路径。 当阀关闭时，通过第一路径的流动允许主阀芯以比通过更受限制的第二路径发生流动时更快的速度移动。

公开(公告)号：US20080042087A1

公开(公告)日：2008-02-21

申请号：US11426397

申请日：2006-06-26

申请人： Joseph L. Pfaff

发明人： Joseph L. Pfaff

IPC分类号： F16K31/02

CPC分类号： F15B11/006 ,  F15B21/08 ,  F15B2211/20546 ,  F15B2211/30575 ,  F15B2211/3144 ,  F15B2211/327 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7053 ,  H01F7/13 ,  H01F7/1844 ,  H01F27/34

摘要： A method for operating an electrohydraulic valve initially derives a characterization value that denotes how magnetic hysteresis affects valve operation. Upon receiving a command that designates a desired magnitude of electric current to be applied to the electrohydraulic valve, that command is modified based on the characterization value to compensate for the magnetic hysteresis. The modified command then is employed to apply electric current to the electrohydraulic valve.

摘要翻译： 用于操作电动液压阀的方法最初导出表征值，其表示磁滞如何影响阀门操作。 在接收到指定要施加到电动液压阀的期望电流大小的命令时，基于表征值修改该指令以补偿磁滞。 然后，改变的命令用于将电流施加到电动液压阀。

公开(公告)号：US07210291B2

公开(公告)日：2007-05-01

申请号：US11406651

申请日：2006-04-19

申请人： Joseph L. Pfaff

发明人： Joseph L. Pfaff

IPC分类号： H04L12/40 ,  G06F7/00 ,  G05B19/414

CPC分类号： E02F9/226 ,  E02F3/435

摘要： A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controllers exchange messages over a communication network which has a finite bandwidth. Access to the network is controlled by determining which function controllers govern high priority operations and allowing those function controllers to send messages as often as once every first interval of time. The other function controllers are limited to sending messages no more often than once every second interval of time, which is longer than the first interval of time.

摘要翻译： 一种具有多个液压功能的分布式液压系统，每个液压功能包括液压致动器，控制流体流向液压致动器的阀组件以及操作阀组件的功能控制器。 功能控制器通过具有有限带宽的通信网络交换消息。 通过确定哪些功能控制器控制高优先级操作并允许这些功能控制器经常每隔一段时间发送消息来控制对网络的访问。 其他功能控制器限于每隔一段时间发送消息不止一次，这比第一个时间间隔长。

公开(公告)号：US07194855B2

公开(公告)日：2007-03-27

申请号：US10972853

申请日：2004-10-25

申请人： Joseph L. Pfaff

发明人： Joseph L. Pfaff

IPC分类号： G06F7/00

CPC分类号： E02F9/226 ,  E02F3/435

摘要： A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controllers exchange messages over a communication network which has a finite bandwidth. Access to the network is controlled by determining which function controllers govern high priority operations and allowing those function controllers to send messages as often as once every first interval of time. The other function controllers are limited to sending messages no more often than once every second interval of time, which is longer than the first interval of time.

摘要翻译： 一种具有多个液压功能的分布式液压系统，每个液压功能包括液压致动器，控制流体流向液压致动器的阀组件以及操作阀组件的功能控制器。 功能控制器通过具有有限带宽的通信网络交换消息。 通过确定哪些功能控制器控制高优先级操作并允许这些功能控制器经常每隔一段时间发送消息来控制对网络的访问。 其他功能控制器限于每隔一段时间发送消息不止一次，这比第一个时间间隔长。