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1. 发明授权

US09032724B2 Command based method for allocating fluid flow from a plurality of pumps to multiple hydraulic functions 有权
标题翻译：用于将流体从多个泵分配到多个液压功能的基于命令的方法
公开(公告)号：US09032724B2
公开(公告)日：2015-05-19
申请号：US13158631
申请日：2011-06-13
申请人： Joseph L. Pfaff , Eric P. Hamkins , Corey K. Quinnell
发明人： Joseph L. Pfaff , Eric P. Hamkins , Corey K. Quinnell
IPC分类号： F15B13/02 , F15B11/17 , E02F9/22
CPC分类号： F15B11/17 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F15B2211/20523 , F15B2211/20546 , F15B2211/20576 , F15B2211/265 , F15B2211/30575 , F15B2211/6306 , F15B2211/6309 , F15B2211/6313 , F15B2211/6346
摘要： Fluid from two pumps is allocated to a plurality of hydraulic actuators based on a plurality of flow commands, each specifying a desired amount of flow to be applied to a different hydraulic actuator. For a given hydraulic actuator, the allocation involves (1) determining an apportionment of the desired amount of flow, if no other hydraulic actuator is active, and (2) altering the apportionment in response to all the plurality of flow commands, and (3) using the altered apportionment to determine a first amount of the flow for one pump to provide and a second amount of the flow for the other pump to provide. The process is repeated for all the hydraulic actuators. Supply valves for each hydraulic actuator are controlled by the associated first and second amounts and each pump is controlled in response to either the first or second amounts for all the hydraulic actuators.
摘要翻译：基于多个流动指令将来自两个泵的流体分配给多个液压致动器，每个流量指令指定要施加到不同液压致动器的期望流量。对于给定的液压致动器，分配涉及（1）如果没有其他液压致动器是有效的，则确定所需量的流量的分配，以及（2）响应于所有多个流动命令改变分配，并且（3 ）使用改变的分配来确定一个泵提供的第一量的流量和另一个泵提供的第二量的流量。对于所有液压执行器重复该过程。用于每个液压致动器的供应阀由相关联的第一和第二量控制，并且响应于所有液压致动器的第一或第二量来控制每个泵。

2. 发明申请

US20140060032A1 MULTIPLE FUNCTION HYDRAULIC SYSTEM WITH A VARIABLE DISPLACEMENT PUMP AND A HYDROSTATIC PUMP-MOTOR 审中-公开
标题翻译：具有可变位移泵和静压泵电机的多功能液压系统
公开(公告)号：US20140060032A1
公开(公告)日：2014-03-06
申请号：US14004783
申请日：2012-03-15
申请人： Joseph L. Pfaff , Eric P. Hamkins
发明人： Joseph L. Pfaff , Eric P. Hamkins
IPC分类号： F15B7/00
CPC分类号： F15B7/003 , E02F9/2235 , E02F9/2242 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/165 , F15B11/17 , F15B2211/20546 , F15B2211/253 , F15B2211/3116 , F15B2211/6052 , F15B2211/654
摘要： A hydraulic system includes a first pump and a plurality of valves that control fluid flow from the first pump to several actuators. Variable source orifices in the control valves are connected in parallel between the first pump and a node, and variable bypass orifices in the control valves are connected in series between the node and a tank. Pressure at the node controls displacement of the first pump. Each control valve also has a metering orifice for varying fluid flow between the node and one of the actuators. A hydrostatic pump-motor, coupled between two ports of a given actuator, is driven in a motoring mode by fluid exiting one of those ports. In a pumping mode, the hydrostatic pump-motor forces lower pressure fluid exhausting from one port into the other port of the given actuator.
摘要翻译：液压系统包括第一泵和多个阀，其控制从第一泵到多个致动器的流体流动。控制阀中的可变源孔并联连接在第一泵和节点之间，并且控制阀中的可变旁通孔连接在节点和罐之间。节点处的压力控制第一泵的位移。每个控制阀还具有用于在节点和致动器中的一个之间改变流体流动的计量孔口。耦合在给定致动器的两个端口之间的静液压泵电动机通过流出其中一个端口的流体以电动模式被驱动。在泵送模式中，静液压泵马达将较低压力的流体从一个端口排出到给定致动器的另一个端口。

3. 发明申请

US20120085440A1 FLOW SUMMATION SYSTEM FOR CONTROLLING A VARIABLE DISPLACEMENT HYDRAULIC PUMP 有权
标题翻译：用于控制变量液压泵的流量辅助系统
公开(公告)号：US20120085440A1
公开(公告)日：2012-04-12
申请号：US12901058
申请日：2010-10-08
申请人： Joseph L. Pfaff , Eric P. Hamkins
发明人： Joseph L. Pfaff , Eric P. Hamkins
IPC分类号： E03B5/00
CPC分类号： F15B11/16 , F15B11/055 , F15B2211/20553 , F15B2211/253 , F15B2211/3111 , F15B2211/3116 , F15B2211/40515 , F15B2211/40592 , F15B2211/413 , Y10T137/85978
摘要： A valve assembly couples a plurality of hydraulic actuators to a variable displacement pump and to a tank. A separate valve is associated with each hydraulic actuator and comprises a variable flow source orifice between the supply conduit and a summation node coupled to a pump control port, a variable metering orifice between the summation node and the associated hydraulic actuator, and a variable bypass orifice between the summation node and the tank. As a valve operates to enlarge the metering orifice, the flow source orifice also enlarges, and the bypass orifice shrinks. When the valve operates to shrink the metering orifice, the flow source orifice also shrinks and the bypass orifice enlarges. Those operations vary fluid flow in and out of the summation node, which alters pressure applied to the pump control, thereby causing the pump output to vary as required to drive the associated hydraulic actuator.
摘要翻译：阀组件将多个液压致动器耦合到可变排量泵和罐。单独的阀与每个液压致动器相关联并且包括在供应管道和耦合到泵控制端口的总和节点之间的可变流源孔口，在总和节点和相关联的液压致动器之间的可变计量孔口，以及可变旁路孔口在总和节点和油箱之间。当阀门操作以扩大计量孔口时，流动源孔口也扩大，并且旁路管口收缩。当阀门操作以收缩计量孔口时，流动源孔口也收缩并且旁路孔口扩大。这些操作改变流入和流出加和节点的流体流量，这改变了施加到泵控制器上的压力，从而使得泵输出根据需要而变化以驱动相关联的液压致动器。

4. 发明授权

US07874152B2 Hydraulic system with compensation for kinematic position changes of machine members 失效
标题翻译：液压系统补偿机构的运动位置变化
公开(公告)号：US07874152B2
公开(公告)日：2011-01-25
申请号：US12113517
申请日：2008-05-01
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： F15B11/00 , E02F9/22
CPC分类号： F15B21/087 , E02F9/2203 , E02F9/2221 , F15B2211/6309 , F15B2211/6313 , F15B2211/6336 , F15B2211/6346
摘要： A machine, such as a backhoe, has a series of components connected in series and moved by separate hydraulic actuators. A position estimator determines the present position of each component from the load acting on the associated hydraulic actuator and a velocity command for the component. For each component, a function parameter estimator uses the present positions of the components to derive a set of parameters that include a static structure load that the components exert on the associated hydraulic actuator, acceleration and deceleration limits for both directions of component motion, and a control bandwidth for the associated hydraulic actuator. The set of parameters for a given component is used to control the associated hydraulic actuator.
摘要翻译：诸如反铲机的机器具有串联连接并由单独的液压致动器移动的一系列部件。位置估计器根据作用在相关联的液压致动器上的负载和该部件的速度指令来确定每个部件的当前位置。对于每个组件，功能参数估计器使用组件的当前位置来导出一组参数，其包括组件施加在相关联的液压致动器上的静态结构负载，分量运动的两个方向的加速和减速限制，以及控制相关液压执行器的带宽。给定组件的一组参数用于控制相关的液压执行器。

5. 发明授权

US07823379B2 Energy recovery and reuse methods for a hydraulic system 有权
标题翻译：液压系统的能量回收和再利用方法
公开(公告)号：US07823379B2
公开(公告)日：2010-11-02
申请号：US11939847
申请日：2007-11-14
申请人： Eric P. Hamkins , Dwight B. Stephenson , Joseph L. Pfaff , Keith A. Tabor
发明人： Eric P. Hamkins , Dwight B. Stephenson , 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 , F15B2211/7053 , F15B2211/7058 , F15B2211/7128 , F15B2211/88
摘要： A method provides several modes for recovering hydraulic energy produced by an overrunning load acting on cylinders connected in parallel to a machine component. In one mode, fluid from first chambers in both cylinders is routed into the accumulator, while other fluid is directed into second chambers of those cylinders. In a different mode, fluid is routed from the first chamber of only one cylinder into the accumulator, and fluid from the first chamber of the other cylinder goes into the second chambers of both cylinders. Yet another mode comprises routing fluid from the first chambers of both cylinders into the second chambers of both cylinders. In still another mode, fluid from the first chambers of both cylinders goes into the return conduit while the second chambers of both cylinders receive fluid from a supply conduit. Several modes of reusing the recovered energy are described.
摘要翻译：一种方法提供了几种模式，用于回收由作用在与机器部件并联连接的气缸上的超越负载产生的液压能量。在一种模式中，来自两个气缸中的第一腔室的流体被引导到蓄能器中，而其它流体被引导到这些气缸的第二腔室中。在不同的模式中，流体从仅一个气缸的第一室传送到蓄能器中，并且来自另一个气缸的第一室的流体进入两个气缸的第二室。另一种模式包括将流体从两个气缸的第一室引导到两个气缸的第二腔室中。在另一种模式中，来自两个气缸的第一腔室的流体进入返回导管，而两个气缸的第二腔室从供应导管接收流体。描述了重新利用回收能量的几种模式。

6. 发明申请

US20090272109A1 HYDRAULIC SYSTEM WITH COMPENSATION FOR KINEMATIC POSITION CHANGES OF MACHINE MEMBERS 失效
标题翻译：液压系统补偿动力位置变化的机器成员
公开(公告)号：US20090272109A1
公开(公告)日：2009-11-05
申请号：US12113517
申请日：2008-05-01
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： F15B11/02 , F15B21/08
CPC分类号： F15B21/087 , E02F9/2203 , E02F9/2221 , F15B2211/6309 , F15B2211/6313 , F15B2211/6336 , F15B2211/6346
摘要： A machine, such as a backhoe, has a series of components connected in series and moved by separate hydraulic actuators. A position estimator determines the present position of each component from the load acting on the associated hydraulic actuator and a velocity command for the component. For each component, a function parameter estimator uses the present positions of the components to derive a set of parameters that include a static structure load that the components exert on the associated hydraulic actuator, acceleration and deceleration limits for both directions of component motion, and a control bandwidth for the associated hydraulic actuator. The set of parameters for a given component is used to control the associated hydraulic actuator.
摘要翻译：诸如反铲机的机器具有串联连接并由单独的液压致动器移动的一系列部件。位置估计器根据作用在相关联的液压致动器上的负载和该部件的速度指令来确定每个部件的当前位置。对于每个组件，功能参数估计器使用组件的当前位置来导出一组参数，其包括组件施加在相关联的液压致动器上的静态结构负载，分量运动的两个方向的加速和减速限制，以及控制相关液压执行器的带宽。给定组件的一组参数用于控制相关的液压执行器。

7. 发明授权

US07487707B2 Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve 失效
标题翻译：具有压力补偿方向滑阀和再生分流阀的液压阀组件
公开(公告)号：US07487707B2
公开(公告)日：2009-02-10
申请号：US11535505
申请日：2006-09-27
申请人： Joseph L. Pfaff , Dwight B. Stephenson
发明人： Joseph L. Pfaff , Dwight B. Stephenson
IPC分类号： F15B11/024 , E02F9/22
CPC分类号： F15B11/165 , F15B11/003 , F15B11/024 , F15B11/0445 , F15B11/05 , F15B13/0402 , F15B13/0433 , F15B13/0435 , F15B13/16 , F15B2211/20546 , F15B2211/253 , F15B2211/30555 , F15B2211/329 , F15B2211/5059 , F15B2211/6054 , F15B2211/6309 , F15B2211/6313 , F15B2211/6346 , F15B2211/7053 , F15B2211/8636
摘要： A hydraulic circuit controls flow of fluid between first and second ports of a hydraulic actuator, such as a cylinder/piston arrangement and each of a supply conduit and a tank return conduit. The hydraulic circuit operates in standard powered operating modes as well as powered and unpowered regeneration modes. In a powered operating mode, a conventional pressure compensated spool valve determines the velocity of the hydraulic actuator. A workport blocking valve connects one workport of the spool valve to the first port and the other workport is connected to the second port. A regeneration shunt valve is directly connected between the first and second ports of the hydraulic actuator. In a regeneration operating mode or a mix of powered and regeneration modes, a combination of the spool valve, the workport blocking valve, and the regeneration shunt valve determines the velocity of the hydraulic actuator.
摘要翻译：液压回路控制液压致动器的第一和第二端口之间的流体流动，例如气缸/活塞装置以及供应管道和罐返回管道中的每一个。液压回路在标准动力运行模式以及动力和无动力再生模式下运行。在动力操作模式中，传统的压力补偿滑阀确定液压致动器的速度。工作端口截止阀将滑阀的一个工作端口连接到第一端口，另一个工作端口连接到第二端口。再生分流阀直接连接在液压执行器的第一和第二端口之间。在再生操作模式或动力和再生模式的混合中，滑阀，工作端口阻塞阀和再生分流阀的组合决定了液压致动器的速度。

8. 发明授权

US07406982B2 Hydraulic system control method using a differential pressure compensated flow coefficient 失效
标题翻译：液压系统控制方法采用差压补偿流量系数
公开(公告)号：US07406982B2
公开(公告)日：2008-08-05
申请号：US11089482
申请日：2005-03-24
申请人： Joseph L. Pfaff , Keith A. Tabor
发明人： Joseph L. Pfaff , Keith A. Tabor
IPC分类号： F16K31/06
CPC分类号： F15B21/02 , F15B11/006 , F15B21/087 , F15B2211/30575 , F15B2211/426 , F15B2211/455 , F15B2211/6306 , F15B2211/6654 , F15B2211/7053 , F15B2211/75 , Y10T137/87217
摘要： A hydraulic system has an electrohydraulic valve that controls flow of fluid to operate a hydraulic actuator, such as a cylinder or motor. A set of characterization data is provided which describes performance of the electrohydraulic valve as a function of changes in differential pressure across that valve. The hydraulic system is operated by specifying desired movement of the hydraulic actuator and in response deriving a desired valve flow coefficient which designates a level of fluid flow through the electrohydraulic valve. A compensated control signal is produced from the desired valve flow coefficient and the characterization data, to counter act effects that changes in differential pressure have on flow of fluid. The electrohydraulic valve is activated in response to the compensated control signal.
摘要翻译：液压系统具有电液阀，其控制流体的流动以操作液压致动器，例如气缸或马达。提供了一组表征数据，其描述了电液阀的性能作为该阀上的压差变化的函数。通过指定液压致动器的所需运动来操作液压系统，并且响应于导出指定通过电动液压阀的流体水平的期望的阀流量系数。从期望的阀流量系数和特征数据产生补偿控制信号，以抵消差压变化对流体流动的影响。电液阀响应于补偿的控制信号被激活。

9. 发明授权

US07373869B2 Hydraulic system with mechanism for relieving pressure trapped in an actuator 失效
标题翻译：液压系统，具有释放执行器压力的机构
公开(公告)号：US07373869B2
公开(公告)日：2008-05-20
申请号：US11373892
申请日：2006-03-13
申请人： Joseph L. Pfaff , Keith A. Tabor
发明人： Joseph L. Pfaff , Keith A. Tabor
IPC分类号： F15B11/10
CPC分类号： F15B11/006 , F15B2211/20538 , F15B2211/30575 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/327 , F15B2211/45 , F15B2211/6306 , F15B2211/6309 , F15B2211/6313 , F15B2211/6346 , F15B2211/6653 , F15B2211/7053 , F15B2211/88
摘要： Pressure trapped in an inactive hydraulic actuator can result in the actuator moving in a direction which is opposite to that desired upon subsequent activation. The present method detects a trapped pressure condition and takes remedial action before activating the hydraulic actuator for motion. The pressure differentials across valves that control the fluid flow to and from the hydraulic actuator are used to detect a trapped pressure condition. In response to that detection, a selected valve is initially opened in a manner that releases the trapped pressure while producing motion in the desired direction. After the trapped pressure condition has been resolved, one or more other valves are operated to produce the desired motion of the hydraulic actuator.
摘要翻译：被捕获在非活动液压执行器中的压力可导致致动器在随后激活时与所需的方向相反的方向移动。本方法检测被捕获的压力状况，并在启动液压致动器进行运动之前采取补救措施。用于控制流入和流出液压致动器的流体的阀门之间的压力差用于检测被捕获的压力状况。响应于该检测，选择的阀最初以释放被捕获的压力同时在所需方向产生运动的方式打开。在捕获的压力条件已经解决之后，一个或多个其他阀被操作以产生液压致动器的期望的运动。

10. 发明申请

US20080110166A1 ENERGY RECOVERY AND REUSE TECHNIQUES FOR A HYDRAULIC SYSTEM 有权
标题翻译：液压系统的能源回收和再利用技术
公开(公告)号：US20080110166A1
公开(公告)日：2008-05-15
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： F15B11/024
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。

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