公开(公告)号：US5659485A

公开(公告)日：1997-08-19

申请号：US233517

申请日：1994-04-26

Applicant: Jin-Han Lee

Inventor： Jin-Han Lee

IPC: E02F9/22 ,  F04B1/24 ,  F04B49/00 ,  F04B49/06 ,  F15B7/00 ,  F15B11/00 ,  G05D7/06 ,  F16D31/02

CPC classification number: G05D7/0682 ,  F04B49/065 ,  F04B2201/12051 ,  F04B2203/0605 ,  F04B2205/05 ,  F04B2207/00 ,  F15B2211/20546 ,  F15B2211/26 ,  F15B2211/265 ,  F15B2211/633

Abstract: A discharge flow control system and method of a hydraulic pump driven by an engine for the minimization of the difference between a discharge mount of flow in the pump and total mount of operating oil necessary to operate each actuator in hydraulic equipment. The control system is provided with a detector which detects the number of rotation of the engine, generates equal number of pulses to the number of rotation, a detector which detects the tilt angle of a swash plate of the pump, a detector which detects the operating displacement of the actuator, a detector which detects the load pressure acting on the pump, and a controll unit which controls a target discharge flow mount of the pump which is suitable for performing a predetermined work based on the number of rotation, the tilt angle, the displacement and the load pressure.

Abstract translation: 一种由发动机驱动的液压泵的排放流量控制系统和方法，用于最小化在泵中的流量的排放装置与在液压设备中操作每个致动器所需的操作油的总体安装之间的差异。 控制系统设置有检测发动机的旋转次数的检测器，产生与旋转次数相等的脉冲数，检测泵的斜盘倾斜角的检测器，检测泵的旋转斜盘角度的检测器 执行器的位移，检测作用在泵上的负载压力的检测器，以及控制单元，其控制适于基于旋转次数，倾斜角度等进行预定工作的泵的目标排出流动支架， 位移和负载压力。

公开(公告)号：US20140241902A1

公开(公告)日：2014-08-28

申请号：US14162912

申请日：2014-01-24

Applicant: CNH America, LLC

Inventor： DUQIANG WU ,  NAVNEET GULATI

IPC: F04B49/06

CPC classification number: F04B49/06 ,  B60K6/08 ,  E02F9/2253 ,  E02F9/2289 ,  F04B1/324 ,  F04B49/065 ,  F04B2201/12051 ,  F16H61/425

Abstract: A method for controlling a hydrostatic drive unit of a work vehicle is disclosed. The method may generally include determining a reference swashplate position of a hydraulic pump of the hydrostatic drive unit, wherein the reference swashplate position is associated with an uncompensated current command, and determining an actual swashplate position of the hydraulic pump, wherein the actual swashplate position differs from the reference swashplate position due to a loading condition of the work vehicle. In addition, the method may include determining a closed-loop current command based at least in part on the actual and reference swashplate positions and generating a modified current command based on at least one of the uncompensated current command or the closed-loop current command. The modified current command may differ from the closed-loop current command when an operator input is within a predetermined control input range and may be equal to the closed-loop current command when the operator input is outside the predetermined control input range.

Abstract translation: 公开了一种用于控制作业车辆的静液压驱动单元的方法。 该方法通常可以包括确定液压驱动单元的液压泵的参考旋转斜盘位置，其中参考旋转斜盘位置与未补偿的电流指令相关联，并且确定液压泵的实际斜盘位置，其中实际斜盘位置不同 由于工作车辆的装载状态，从参考斜盘位置。 另外，该方法可以包括至少部分地基于实际的和参考的斜盘位置来确定闭环电流指令，并且基于未补偿的当前命令或闭环电流指令中的至少一个来生成修改的电流指令。 当操作员输入在预定的控制输入范围内时，修改的电流指令可能与闭环电流指令不同，并且当操作者输入超出预定的控制输入范围时可以等于闭环电流指令。

公开(公告)号：US08647075B2

公开(公告)日：2014-02-11

申请号：US12406813

申请日：2009-03-18

Applicant: Navneet Gulati

Inventor： Navneet Gulati

IPC: F04B1/26

CPC classification number: F04B49/128 ,  F04B1/324 ,  F04B49/22 ,  F04B2201/0805 ,  F04B2201/12051 ,  Y10T137/86694 ,  Y10T137/8671

Abstract: A fluid device includes a variable swashplate adapted for movement between a first position and a second position. A control piston is adapted to selectively move the variable swashplate between the first and second positions. A control valve is in fluid communication with the control piston. The control valve includes a sleeve defining a spool bore, at least one fluid inlet passage in fluid communication with a fluid source and at least one control passage in fluid communication with the control piston. The control fluid passage includes an opening at the spool bore. A spool is disposed in the spool bore of the sleeve. The spool includes a metering surface that selectively communicates fluid between the fluid inlet passage and the control fluid passage. The metering surface has a first end and a second end. The metering surface having a tapered surface disposed between the first and second ends.

Abstract translation: 流体装置包括适于在第一位置和第二位置之间移动的可变斜盘。 控制活塞适于在第一和第二位置之间选择性地移动可变斜盘。 控制阀与控制活塞流体连通。 控制阀包括限定滑阀孔的套筒，与流体源流体连通的至少一个流体入口通道和与控制活塞流体连通的至少一个控制通道。 控制流体通道包括在阀芯孔处的开口。 阀芯设在套管的阀芯孔中。 阀芯包括选择性地在流体入口通道和控制流体通道之间连通流体的计量表面。 计量表面具有第一端和第二端。 计量表面具有设置在第一和第二端之间的锥形表面。

公开(公告)号：US20120227391A1

公开(公告)日：2012-09-13

申请号：US13510814

申请日：2010-11-01

Applicant: Jae Seok Bang ,  Woo Yong Jung ,  Won Sun Sohn

Inventor： Jae Seok Bang ,  Woo Yong Jung ,  Won Sun Sohn

IPC: F15B15/20 ,  F15B15/02

CPC classification number: F04B49/08 ,  E02F9/123 ,  E02F9/2235 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F04B1/324 ,  F04B23/06 ,  F04B49/002 ,  F04B49/065 ,  F04B2201/12051 ,  F04B2205/05 ,  F15B11/17 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/251 ,  F15B2211/265 ,  F15B2211/6309 ,  F15B2211/6652 ,  F15B2211/6653 ,  F15B2211/7058 ,  F15B2211/7135

Abstract: The present invention relates to a device for controlling a hydraulic pump of construction machinery. The device has a first pump supplying working fluid through a swing control valve to a swing motor, and a second pump supplying working fluid through a work tool control valve to a work tool actuator, and includes: a first tilting angle control unit for controlling a discharge flow of the first pump by controlling a tilting angle of the first pump according to an input pump control signal; and a controller deducting a discharge pressure (P2) of the second pump from a discharge pressure (P1) of the first pump to calculate a pump difference pressure-(P1-P2), comparing the calculated pump difference pressure (P1-P2) to a reference difference pressure and, when the calculated pump difference pressure (P1-P2) is greater than the reference difference pressure, outputting the pump control signal to the first tilting angle control unit to make the discharge pressure (P1) of the first pump equal to or less than a first reference pressure that is less than or equal to a swing relief pressure.

Abstract translation: 本发明涉及一种用于控制工程机械的液压泵的装置。 该装置具有通过摆动控制阀向摆动马达供给工作流体的第一泵，以及通过工作工具控制阀向工作工具致动器供给工作流体的第二泵，包括：第一倾斜角度控制单元， 通过根据输入泵控制信号控制第一泵的倾斜角来排出第一泵的流量; 并且控制器从第一泵的排出压力（P1）中减去第二泵的排出压力（P2），以计算泵差压 - （P1-P2），将计算的泵差压力（P1-P2）与 参考差压，当计算出的泵差压力（P1-P2）大于基准差压时，将泵控制信号输出到第一倾斜角控制单元，使第一泵的排出压力（P1）相等 达到或小于小于或等于摆动释放压力的第一参考压力。

公开(公告)号：US20100206161A1

公开(公告)日：2010-08-19

申请号：US12710050

申请日：2010-02-22

Applicant: Herbert DREHER ,  Clemens KREBS ,  Timo NAFZ

Inventor： Herbert DREHER ,  Clemens KREBS ,  Timo NAFZ

IPC: F15B15/00

CPC classification number: F04B1/324 ,  F04B1/2014 ,  F04B49/002 ,  F04B2201/12041 ,  F04B2201/12051

Abstract: An axial piston machine in a swash-plate construction with an actuating device. The actuating device comprises a actuating piston and a mating piston. The actuating piston and the mating piston are connected to the swash plate each with the first end thereof and can be applied with the second end thereof with a force acting in the direction of the first end. For resetting the swash plate in the direction of a resting position, an elastic element is provided on the actuating piston and on the mating piston, which is supported on a spring bearing arranged on the first side facing the swash plate of the actuating piston or of the mating piston. In the other direction, the elastic element is supported on a second spring bearing arranged on the end facing away from the swash plate of the actuating piston or of the mating piston. When the swash plate is deflected from the resting position, the second spring bearing of the actuating piston or of the mating piston is supported on a counter bearing on the housing side. The second spring bearing of the respective other actuating bearing or mating bearing is supported on a counter bearing on the piston side.

Abstract translation: 一种带有致动装置的旋转斜盘结构的轴向活塞机。 致动装置包括致动活塞和配合活塞。 致动活塞和配合活塞连接到斜盘，每个斜盘的第一端都可以与其第二端一起施加在第一端的方向上的力。 为了沿静止位置的方向复位斜盘，弹性元件设置在致动活塞上和配合活塞上，配合活塞被支撑在布置在面向致动活塞的斜板的第一面上的弹簧轴承上，或者 配合活塞。 在另一方向上，弹性元件被支撑在布置在远离致动活塞或配合活塞的斜板的一端上的第二弹簧轴承上。 当旋转斜盘从静止位置偏转时，致动活塞或配合活塞的第二弹簧轴承支撑在壳体侧的止推轴承上。 相应的其它致动轴承或配合轴承的第二弹簧轴承支撑在活塞侧的反向轴承上。

公开(公告)号：US20100199838A1

公开(公告)日：2010-08-12

申请号：US12710131

申请日：2010-02-22

Applicant: Clemens KREBS ,  Timo Nafz

Inventor： Clemens KREBS ,  Timo Nafz

IPC: F01B3/00 ,  F04B1/26

CPC classification number: F04B1/324 ,  F04B1/2014 ,  F04B49/002 ,  F04B2201/12041 ,  F04B2201/12051

Abstract: A hydraulic system with an adjustable hydrostatic machine is provided that includes an adjustment mechanism. The adjustment mechanism interacts with an actuating device which has at least one actuating piston delimiting an actuating pressure space. The system has a regulating valve with which, for the displacement of the actuating piston and therefore for the actuation of the adjustment device, the supply and removal of pressure medium into and from the actuating pressure chamber can be controlled, wherein the regulating valve has a valve piston which is subjected to a force of a feedback spring, which force is dependent on the position of the adjustment mechanism. The valve piston is additionally subjected to a counterforce acting counter to the force of the feedback spring, and an actuating component is provided, with which the valve piston can be subjected to a control force acting in the same direction as the counterforce or to a control force acting counter to the counterforce.

Abstract translation: 提供了具有可调静压机的液压系统，其包括调节机构。 调节机构与致动装置相互作用，所述致动装置具有限定致动压力空间的至少一个致动活塞。 该系统具有调节阀，对于致动活塞的位移并因此用于调节装置的致动，可以控制进入和离开致动压力室的压力介质的供应和移除，其中调节阀具有 阀活塞受到反馈弹簧的力，该力取决于调节机构的位置。 阀活塞另外受到与反馈弹簧的作用相反作用的反作用力，并且提供致动部件，阀活塞可以经受与活塞相反方向作用的控制力或控制力 反对力量的力量。

公开(公告)号：US20100150745A1

公开(公告)日：2010-06-17

申请号：US12562076

申请日：2009-09-17

Applicant: Leif Moberg

Inventor： Leif Moberg

IPC: F04B49/12 ,  G01B7/30

CPC classification number: F04B1/324 ,  F04B2201/12051

Abstract: An embodiments of the invention relates to a yoke position sensor system (7) for a hydraulic device (1), such as a pump or motor, provided with a moveable yoke (3) which is used for varying the displacement of the hydraulic device (1) and to a method for sensing the position of a yoke (3) relative to a housing (2). The housing (2) and the yoke (3) are movably and rotatably connected to each other. When the yoke (3) is rotated, there is a yoke angle sensor (5) indicating the degrees of rotation of the yoke and a yoke angle of zero corresponds to a zero displacement volume. The hydraulic device (1) comprises a second yoke angle sensor (7) constructed to indicate when the yoke angle is within or outside an interval comprising the zero displacement angle.

Abstract translation: 本发明的实施例涉及一种用于液压装置（1）的轭位置传感器系统（7），例如泵或马达，其设置有用于改变液压装置的位移的可动轭（3） 以及用于感测轭架（3）相对于壳体（2）的位置的方法。 壳体（2）和磁轭（3）彼此可移动和可旋转地连接。 当轭（3）旋转时，存在指示轭的旋转角度的轭角传感器（5），并且零磁轭角度对应于零排量体积。 液压装置（1）包括第二轭角度传感器（7），其构造成指示轭角度何时在包括零位移角度的间隔内或之外。

公开(公告)号：US20070151238A1

公开(公告)日：2007-07-05

申请号：US11637211

申请日：2006-12-11

Applicant: Wolfgang Kraft

Inventor： Wolfgang Kraft

IPC: F16D31/02

CPC classification number: E02F9/225 ,  E02F9/2235 ,  E02F9/2296 ,  F04B49/065 ,  F04B2201/12051 ,  F04B2205/05 ,  F15B11/165 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/6309 ,  F15B2211/6313

Abstract: A hydrostatic drive system (1) has a load-sensing pump (2) with an adjustable discharge volume and at least one consumer connected to the pump (2). The discharge volume of the pump (2) can be set by a discharge volume control device (6) that sets the delivery pressure of the pump available in a delivery line (4) of the pump (2) so that it is higher by a pilot control pressure than the load pressure of the consumer. The discharge volume control device (6) can be actuated by an electronic control device (7) functionally connected with a sensor device (9) for measuring the load pressure of the consumer and with a sensor device (8) for measuring the delivery pressure available in the delivery line (4). A circulation device (15) is associated with the delivery line (4) to control the connection of the delivery line (4) with a reservoir (3).

Abstract translation: 静液压驱动系统（1）具有具有可调放电容积的负载感测泵（2）和连接到泵（2）的至少一个使用者。 泵（2）的排出容积可以由放电容量控制装置（6）设定，排放容积控制装置（6）将泵（2）的输送管线（4）中可用的泵的输送压力设定为高于一 先导控制压力比消费者的负载压力。 排放量控制装置（6）可以由与用于测量消费者的负载压力的传感器装置（9）功能性连接的电子控制装置（7）和用于测量可用的输送压力的传感器装置（8）致动 在送货线（4）。 循环装置（15）与输送管线（4）相关联，以控制输送管线（4）与贮存器（3）的连接。

公开(公告)号：US20070028608A1

公开(公告)日：2007-02-08

申请号：US11502193

申请日：2006-08-10

Applicant: George Kadlicko

Inventor： George Kadlicko

IPC: F16D31/02

CPC classification number: F16D31/02 ,  F04B1/324 ,  F04B49/002 ,  F04B49/08 ,  F04B2201/0805 ,  F04B2201/1201 ,  F04B2201/12051 ,  Y10S92/02

Abstract: A variable capacity hydraulic machine has a rotating group located within a casing and a control housing secured to the casing to extend across and seal an opening in the casing. The control housing accommodates a control circuit and a pair of sensors to sense change in parameters associated with the rotating group. One of the sensors is positioned adjacent the barrel on the rotating group to sense rotational speed and the other senses displacement of the swashplate. The control housing accommodates a control valve and accumulator to supply fluid to the control valve.

Abstract translation: 可变容量液压机具有位于壳体内的旋转组和固定到壳体的控制壳体，以延伸跨过并密封壳体中的开口。 控制壳体容纳控制电路和一对传感器以感测与旋转组相关联的参数的变化。 传感器中的一个定位在旋转组上的筒附近以感测旋转速度，而另一个感测旋转斜盘的位移。 控制壳体容纳控制阀和蓄能器以将流体供应到控制阀。

公开(公告)号：US5073091A

公开(公告)日：1991-12-17

申请号：US412211

申请日：1989-09-25

Applicant: Roy T. Burgess ,  Rajamouli Gunda ,  Frank Herta ,  Robert C. Hodges ,  James A. Kessler ,  Richard S. Leemhuis ,  Michael R. McCarty ,  Robert W. Stephens

Inventor： Roy T. Burgess ,  Rajamouli Gunda ,  Frank Herta ,  Robert C. Hodges ,  James A. Kessler ,  Richard S. Leemhuis ,  Michael R. McCarty ,  Robert W. Stephens

IPC: F04B49/00 ,  F04B1/26 ,  F04B49/06 ,  G05D16/20

CPC classification number: G05D16/2066 ,  F04B49/065 ,  F04B2201/1201 ,  F04B2201/12051 ,  F04B2205/05 ,  F04B2207/01 ,  F04B2207/0422

Abstract: A rotary hydraulic machine which includes a housing having a shaft mounted for rotation within the housing about a shaft axis. A cylidner block is coupled to the shaft for co-rotation with the shaft within the housing and includes a plurality of cylinders disposed in a circumferential array parallel to and surrounding the shaft axis. A piston is disposed to reciprocate within each of the cylinders and is coupled to a yoke for determining displacement of the pistons within the cylinders. A valve plate is mounted on a valve block and includes kidney-shaped slots for registering with the cylinders as the cylinder block rotates, and thereby connecting the cylinders to pump input and output ports. A microprocessor-based controller is externally mounted on the pump valve block and includes internal memory having various remotely-selectable control programs prestored therein. Sensors responsive to pump operating conditions are connected to the pump control electronics, and include a first sensor responsive to yoke position, a pressure sensor responsive to pump output pressure and a speed sensor responsive to angular velocity of shaft rotation. All of the electronic components are mounted on the valve block.