公开(公告)号：US12078157B2

公开(公告)日：2024-09-03

申请号：US17562214

申请日：2021-12-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Weishun Willaim Ni ,  Edward W. Goy ,  Benjamin T. Harder ,  Mark W. Shoemaker

IPC: F04B1/328 ,  F02C9/30 ,  F04B49/06 ,  F04B13/00

CPC classification number: F04B1/328 ,  F02C9/30 ,  F04B49/06 ,  F04B13/00 ,  F04B2201/12051 ,  F04B2205/02 ,  F04B2205/05

Abstract: A variable displacement piston pump, having: a housing, a pivot assembly to pivot between minimal and maximum pivot angles; a pump cover defining an actuator bore with an actuator piston, an actuator arm extending from the actuator piston to the pivot assembly; and an electronic control unit (ECU) coupled to the pump, the ECU having: a pump controller, a linear variable differential transducer (LVDT) coupled to the pump controller and the actuator piston, and an electrohydraulic solenoid valve (EHSV) coupled to the pump controller, the ECU is configured to: determine a pivot differential for the pivot assembly between a target pivot angle and a current pivot angle; determine a position differential for the actuator piston, corresponding to the pivot differential of the pivot assembly; control the EHSV to move the actuator piston by the position differential; and determine, from the LVDT, that the actuator piston moved by the position differential.

公开(公告)号：US11994123B2

公开(公告)日：2024-05-28

申请号：US17905974

申请日：2021-02-24

Applicant: PMP PRO-MEC S.P.A.

Inventor： Riccardo Pozzo ,  Luca De Carli

IPC: F04B49/00 ,  F04B1/295 ,  F04B1/324 ,  F04B49/06 ,  F04B53/10

CPC classification number: F04B49/002 ,  F04B1/295 ,  F04B1/324 ,  F04B49/065 ,  F04B53/1082 ,  F04B2201/12041 ,  F04B2201/12051

Abstract: Control system and control method of a variable displacement hydraulic pump wherein the system includes a detection sensor for detection of the actually set displacement and a control unit for current control of a couple of solenoids controlling displacement increase and decrease.

公开(公告)号：US09938966B2

公开(公告)日：2018-04-10

申请号：US14607126

申请日：2015-01-28

Applicant: Parker-Hannifin Corporation

Inventor： David Mark Heathcoat, Jr. ,  Jason Lee Emmette ,  Roger Paul Gray ,  Somer Renee Malone ,  Kirk Ayres Lola ,  Kerry Todd Brock ,  Eli Cutshall

IPC: F16D39/00 ,  F04B1/20 ,  F04B1/32 ,  F04B49/12 ,  F16D31/02 ,  F04B17/03 ,  F16H61/435

CPC classification number: F04B1/20 ,  F04B1/2085 ,  F04B1/324 ,  F04B17/03 ,  F04B49/12 ,  F04B2201/12051 ,  F16D31/02 ,  F16H61/435

Abstract: A zero turn mower vehicle 10 includes left and right hydrostatic transmissions 11a, 11b driving wheels 15a, 15b. The transmissions 11a, 11b each include a swashplate type axial piston hydraulic pump 17 having a swashplate 22. A system 12 and method controls each pump 17. A controller 31 receives input signals and provides output signals to electric motors 33a, 33b to control each swashplate 22. Operator interface input devices 30a, 30b provide inputs to controller 31. Angle sensors 35a, 35b provide additional inputs to controller 31. Displacement amplifiers 36a, 36b amplify displacement of each swashplate 22, and torque amplifiers 34a, 34b amplify torque of electric motors 33a, 33b.

公开(公告)号：US09010102B2

公开(公告)日：2015-04-21

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 ,  F04B49/08 ,  E02F9/12 ,  E02F9/22

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：US07992484B2

公开(公告)日：2011-08-09

申请号：US11502193

申请日：2006-08-10

Applicant: George Kadlicko

Inventor： George Kadlicko

IPC: F01B3/02

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：US07860683B2

公开(公告)日：2010-12-28

申请号：US11922657

申请日：2006-12-12

Applicant: Thomas Kunze ,  Wilfried Eichner

Inventor： Thomas Kunze ,  Wilfried Eichner

IPC: G06F11/30

CPC classification number: F04B51/00 ,  F04B1/34 ,  F04B2201/0802 ,  F04B2201/12051 ,  F04B2205/05 ,  F04C2270/80

Abstract: The invention relates to a device (1) for state monitoring in hydrostatic displacement units (2), in particular in axial piston machines (3) operated as a pump or as a motor. The device (1) comprises an acquisition unit (4) with a multiplicity of sensors (5) which are attached to the hydrostatic displacement unit (2) and serve to acquire monitoring data (6) and operating data (7), and an evaluating unit (8) which has a device (9) for analysing the monitoring data in the frequency range and a device (10) for analysing the monitoring data in the time range. A diagnostic unit (11) with an output unit (13) is connected to the evaluating unit (8).

Abstract translation: 本发明涉及一种用于静液压位移单元（2）中状态监测的装置（1），特别是在作为泵或马达操作的轴向活塞机（3）中。 装置（1）包括具有多个传感器（5）的采集单元（4），所述多个传感器（5）附接到静液压位移单元（2）并且用于获取监视数据（6）和操作数据（7） 单元（8），其具有用于分析频率范围内的监视数据的设备（9）和用于在时间范围内分析监视数据的设备（10）。 具有输出单元（13）的诊断单元（11）连接到评估单元（8）。

公开(公告)号：US20050172621A1

公开(公告)日：2005-08-11

申请号：US10776768

申请日：2004-02-11

Applicant: George Kadlicko

Inventor： George Kadlicko

IPC: F04B1/32 ,  F04B49/00 ,  F04B49/08 ,  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：US20050084387A1

公开(公告)日：2005-04-21

申请号：US10686369

申请日：2003-10-15

Applicant: Craig Klocke

Inventor： Craig Klocke

IPC: F04B1/26 ,  F04B1/32 ,  F04B49/06 ,  F04B49/00 ,  F04B1/06

CPC classification number: F04B1/324 ,  F04B49/065 ,  F04B2201/12051

Abstract: A control system that can be used on a hydrostatic pump has a feedback sensor to detect the angle of a swashplate. From the information gathered by the feedback sensor about the swashplate and another set command, this information is sent to a microprocessor. The microprocessor then uses an algorithm to create an output signal and also sends out a superimposed dither signal. This dithered output signal is then received by a pressure control that causes a dither servo pressure in a servo system. Because of the dither pressure the servo system adjusts the position of the swashplate.

Abstract translation: 可用于静液压泵的控制系统具有用于检测斜盘角度的反馈传感器。 从反馈传感器收集的关于斜盘和另一组命令的信息，该信息被发送到微处理器。 然后，微处理器使用算法来产生输出信号并且还发出叠加的抖动信号。 然后，通过在伺服系统中产生抖动伺服压力的压力控制来接收该抖动输出信号。 由于抖动压力，伺服系统调整斜盘的位置。

公开(公告)号：US4487109A

公开(公告)日：1984-12-11

申请号：US363701

申请日：1982-03-30

Applicant: Wesley A. Burandt ,  Albert L. Markunas

Inventor： Wesley A. Burandt ,  Albert L. Markunas

IPC: F03C1/06 ,  B64C13/24 ,  F03C1/253 ,  F03C1/40 ,  F04B1/32 ,  F16H61/40 ,  F01B13/04 ,  F01B25/00

CPC classification number: F04B1/324 ,  F04B2201/12051 ,  Y10S60/911

Abstract: The invention relates to an electro-hydraulic control system for a power drive unit having a wobbler controlled variable displacement hydraulic motor wherein the electro-hydraulic control system causes the displacement of the hydraulic motor to match a load to be driven by a power drive unit output shaft coupled to the motor. The system results in the hydraulic motor displacement matching the load as a combined function of the input command signal, the actual wobbler position, as well as the velocity and position of the power drive unit output shaft.

Abstract translation: 本发明涉及一种具有摇摆控制的可变排量液压马达的动力驱动单元的电动液压控制系统，其中电液控制系统使得液压马达的位移与由驱动单元输出驱动的负载相匹配 轴连接到电机。 该系统导致液压马达与负载匹配的位移作为输入指令信号，实际摆臂位置以及动力单元输出轴的速度和位置的组合函数。

公开(公告)号：US3650434A

公开(公告)日：1972-03-21

申请号：US3650434D

申请日：1970-04-06

Applicant: REPUBLIC CORP

Inventor： JOHNSON JAY ,  GARDNER CHARLES R

IPC: F04B1/29 ,  F04B13/02 ,  G05D11/00 ,  B67D5/22

CPC classification number: F04B13/02 ,  F04B1/295 ,  F04B2201/12051 ,  G05D11/008

Abstract: A device for accurately maintaining a constant volumetric proportion between liquids delivered to a mixing point. The device includes means for positively metering the volume of a principal liquid; means for controllably pumping a secondary liquid, means for utilizing the output of the metering apparatus to operate and control the pumping apparatus; means for passing the secondary liquid to and away from the pumping apparatus; means for manually establishing a desired volumetric proportion between the principal and secondary liquids, and means for registering the volume of primary liquid which has passed through the positive metering apparatus. The device is particularly useful in applications wherein the volumetric proportion of a principal liquid to a secondary liquid in a mixture must be accurately controlled.

Abstract translation: 用于精确地保持输送到混合点的液体之间的恒定体积比例的装置。 该装置包括用于积极计量主要液体的体积的装置; 用于可控地泵送次级液体的装置，用于利用计量装置的输出来操作和控制泵送装置的装置; 用于将二次液体送往和远离泵送装置的装置; 用于在主液体和次液之间手动建立所需体积比例的装置，以及用于记录通过正计量装置的初级液体体积的装置。 该装置在必须准确地控制混合物中主要液体与次级液体的体积比例的应用中特别有用。