公开(公告)号：US20100236399A1

公开(公告)日：2010-09-23

申请号：US12406813

申请日：2009-03-18

Applicant: Navneet Gulati

Inventor： Navneet Gulati

IPC: F01B3/10 ,  F04B1/29

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：US07048515B2

公开(公告)日：2006-05-23

申请号：US10344120

申请日：2002-06-20

Applicant: Hirokazu Shimomura ,  Tomohiko Yasuda

Inventor： Hirokazu Shimomura ,  Tomohiko Yasuda

IPC: F04B49/08

CPC classification number: F15B11/165 ,  F04B49/065 ,  F04B49/08 ,  F04B2201/12041 ,  F04B2201/12051 ,  F04B2203/06 ,  F04B2203/0603 ,  F04B2205/05 ,  F04B2205/09 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/255 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/50536 ,  F15B2211/6309 ,  F15B2211/6316 ,  F15B2211/6333 ,  F15B2211/6355 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/71

Abstract: A fuel injection control unit, including an electronic governor and a controller for an engine performs control in a governor region based on an isochronous characteristic. A working machine controller receives a delivery pressure signal P and controls a regulator such that, when the delivery pressure of a hydraulic pump exceeds a predetermined pressure P1, the displacement of the hydraulic pump does not exceed a value decided in accordance with a preset pump absorption torque curve. The working machine controller controls the regulator such that, when the delivery pressure of the hydraulic pump 2 is not higher than the predetermined pressure P1, the displacement of the hydraulic pump is increased as the delivery pressure of the hydraulic pump lowers from the predetermined pressure P1.

Abstract translation: 包括电子调速器和发动机的燃料喷射控制单元基于等时特性在调速器区域中进行控制。 工作机械控制器接收输送压力信号P并控制调节器，使得当液压泵的输送压力超过预定压力P 1时，液压泵的排量不超过根据预设泵确定的值 吸收扭矩曲线。 工作机械控制器控制调节器，使得当液压泵2的输送压力不高于预定压力P 1时，随着液压泵的输送压力从预定压力降低，液压泵的排量增加 P 1。

公开(公告)号：US20040261407A1

公开(公告)日：2004-12-30

申请号：US10610217

申请日：2003-06-30

Inventor： Hongliu Du

IPC: F16D031/02

CPC classification number: F03C1/0697 ,  F03C1/0686 ,  F04B2201/12051 ,  F04B2203/1202 ,  F04B2205/05 ,  F16D31/02

Abstract: A method and apparatus for controlling the motor output speed of a variable displacement hydraulic motor are disclosed. The method may include determining a value indicative of a motor output speed, determining a value indicative of a desired motor output speed, determining a desired position of a control valve using a nonlinear feedback control law, and controlling the motor output speed as a function of the control valve position, wherein the nonlinear feedback control creates a first order system response.

Abstract translation: 公开了一种用于控制可变排量液压马达的马达输出速度的方法和装置。 该方法可以包括确定指示电动机输出速度的值，确定表示期望的电动机输出速度的值，使用非线性反馈控制律确定控制阀的期望位置，以及将电动机输出速度控制为 所述控制阀位置，其中所述非线性反馈控制产生一阶系统响应。

公开(公告)号：US20030156949A1

公开(公告)日：2003-08-21

申请号：US10344120

申请日：2003-02-07

Inventor： Hirokazu Shimomura ,  Tomohiko Yasuda

IPC: F04B049/00

CPC classification number: F15B11/165 ,  F04B49/065 ,  F04B49/08 ,  F04B2201/12041 ,  F04B2201/12051 ,  F04B2203/06 ,  F04B2203/0603 ,  F04B2205/05 ,  F04B2205/09 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/255 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/50536 ,  F15B2211/6309 ,  F15B2211/6316 ,  F15B2211/6333 ,  F15B2211/6355 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/71

Abstract: An fuel injection control unit (an electronic governor 12 and a controller 13) for an engine 1 is capable of performing control in a governor region based on an isochronous characteristic. A working machine controller 18 receives a delivery pressure signal P and controls a regulator 16 such that, when the delivery pressure of a hydraulic pump exceeds a predetermined pressure P1, the displacement of the hydraulic pump does not exceed a value decided in accordance with a preset pump absorption torque curve 20. Also, the working machine controller 18 controls the regulator 16 such that, when the delivery pressure of the hydraulic pump 2 is not higher than the predetermined pressure P1, the displacement of the hydraulic pump is increased as the delivery pressure of the hydraulic pump lowers from the predetermined pressure P1. As a result, even when the governor region is controlled based on the isochronous characteristic, the delivery flow rate of the hydraulic pump is increased as an engine load reduces.

Abstract translation: 用于发动机1的燃料喷射控制单元（电子调速器12和控制器13）能够基于等时特性在调速器区域中进行控制。 工作机械控制器18接收输送压力信号P并控制调节器16，使得当液压泵的输送压力超过预定压力P1时，液压泵的排量不超过根据预设值确定的值 泵吸收扭矩曲线20.此外，工作机械控制器18控制调节器16，使得当液压泵2的输送压力不高于预定压力P1时，液压泵的排量随着输送压力 的液压泵从预定压力P1降低。 结果，即使当基于等时特性来控制调速器区域时，随着发动机负荷减小，液压泵的输送流量也增加。

公开(公告)号：US06375433B1

公开(公告)日：2002-04-23

申请号：US09611387

申请日：2000-07-07

Applicant: Hongliu Du ,  Noah D. Manring

Inventor： Hongliu Du ,  Noah D. Manring

IPC: F04B4900

CPC classification number: F04B49/08 ,  F04B1/324 ,  F04B2201/12051 ,  F04B2205/05 ,  F04B2205/06

Abstract: A method and apparatus for controlling a pump discharge pressure of a variable displacement hydraulic pump having a swashplate, and a servo valve for controlling an angle of inclination of the swashplate. The method and apparatus includes sensing a value of an actual pump discharge pressure, determining a desired control pressure using a first feedback linearization control law, determining a desired servo valve spool position using a second feedback linearization control law, and controlling the value of the actual pump discharge pressure as a function of the first and second feedback linearization control laws.

Abstract translation: 一种用于控制具有斜盘的可变排量液压泵的泵排出压力的方法和装置，以及用于控制斜盘角度的伺服阀。 该方法和装置包括检测实际泵排出压力的值，使用第一反馈线性化控制定律确定期望的控制压力，使用第二反馈线性化控制定律确定期望的伺服阀阀芯位置，以及控制实际的 泵排出压力作为第一和第二反馈线性化控制规律的函数。

公开(公告)号：US6109030A

公开(公告)日：2000-08-29

申请号：US023737

申请日：1998-02-13

Applicant: Kerry G. Geringer

Inventor： Kerry G. Geringer

IPC: F04B49/06 ,  E02F9/22 ,  F04B49/00 ,  F04B49/08 ,  F15B11/17 ,  F16D31/02

CPC classification number: F15B11/17 ,  E02F9/2292 ,  E02F9/2296 ,  F04B49/002 ,  F04B49/08 ,  F04B2201/12051 ,  F04B2205/05 ,  F04B2205/061 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/255 ,  F15B2211/40515 ,  F15B2211/455 ,  F15B2211/6055 ,  F15B2211/75

Abstract: A ganged pumping apparatus includes first and second variable displacement open circuit pumps, each having a load sensing control and a servo actuator together for changing the fluid displacement of each pump respectively. The load sensing controls being adjusted so that the setting of the control on the second pump is lower than the setting of the control on the first pump. The servo actuator of the first pump having over-center capability, allowing the first pump to operate with negative fluid displacement, and the servo actuator of the second pump having a stop to limit minimum displacement to non-negative or zero displacement. A single pressure compensating pilot valve disposed in the first pump provides the pressure compensation function of both pumps. A pilot signal line interconnects the pressure compensating pilot valve, the load sensing controls, and a load such that the flow output of the pumps is combinable into a single output and functions as a single large displacement pump. A method of ganging and phasing the pumps is also disclosed.

Abstract translation: 联动泵送装置包括第一和第二可变排量开路泵，每个具有负载感测控制和伺服致动器，用于分别改变每个泵的流体位移。 负载感测控制被调节，使得第二泵上的控制设置低于第一泵上的控制设置。 第一泵的伺服致动器具有超中心能力，允许第一泵以负流体移动运行，并且第二泵的伺服致动器具有停止以将最小位移限制为非负或零位移。 设置在第一泵中的单个压力补偿先导阀提供两个泵的压力补偿功能。 导频信号线将压力补偿先导阀，负载感测控制和负载相互连接，使得泵的流量输出可组合成单个输出并且用作单个大排量泵。 还公开了一种组合和定相泵的方法。

公开(公告)号：US5881629A

公开(公告)日：1999-03-16

申请号：US808236

申请日：1997-02-28

Applicant: Wilhelm Gollner ,  Eckhard Skirde

Inventor： Wilhelm Gollner ,  Eckhard Skirde

IPC: F04B49/00 ,  F04B49/08 ,  F16H61/42 ,  F16H61/435 ,  F16H61/46 ,  F01B3/10

CPC classification number: F16H61/435 ,  F04B49/002 ,  F04B49/08 ,  F16H61/46 ,  F04B2201/1204 ,  F04B2201/12041 ,  F04B2201/1205 ,  F04B2201/12051 ,  F04B2203/1201 ,  F16H2059/6853

Abstract: A control device for variable hydraulic machines, and specifically for variable axial piston machines equipped with a servo system that is connected to a swash plate so that the discharge/displacement volume is infinitely variable. The hydraulic machine is equipped with a sensor that detects the piston displacement and is connected with an electronical control unit that controls the swash angle position of the swash plate and is pressure controlling the servo system by an electrohydraulic converter. A method for the infinite controlling of the volume flow of hydraulic machines, by which the servo system is connected to the swash plate of the hydraulic machine, and by which a conduction of a signal from a sensor to the control unit, a pressure controlling of the servo system by an electrohydraulic converter as well as the controlling of the swash angle position of the swash plate by the electronical control unit is realized.

Abstract translation: 一种用于可变液压机的控制装置，特别是用于可变轴向活塞机，其配备有连接到斜盘的伺服系统，使得排放/排出体积是无限可变的。 液压机配备有检测活塞位移的传感器，并且与控制斜盘的斜角位置的电子控制单元连接，并通过电动液压转换器对伺服系统进行压力控制。 一种用于无限制地控制液压机的体积流量的方法，通过该方法伺服系统连接到液压机的斜盘，并且通过该方法将传感器的信号传导到控制单元，压力控制 通过电动液压转换器的伺服系统以及通过电子控制单元控制斜盘的斜角位置被实现。

公开(公告)号：US5628188A

公开(公告)日：1997-05-13

申请号：US212804

申请日：1994-03-15

Applicant: Rolf Kordak

Inventor： Rolf Kordak

IPC: F02D45/00 ,  F04B1/08 ,  F16H61/4096 ,  F16H61/46 ,  F16H61/472 ,  G01M15/04 ,  G01D1/16 ,  G05D17/00

CPC classification number: F16H61/4096 ,  F04B1/08 ,  F16H61/46 ,  F16H61/472 ,  F04B2201/12051 ,  F04B2205/05 ,  F04B2207/0441 ,  F04B2207/0442 ,  F16H2059/6853

Abstract: A circuit arrangement for controlling the output torque of a hydrostatic machine connected to a hydraulic system having an impressed operating pressure. The circuit arrangement has a control element for changing the output torque of the machine based upon operating parameters corresponding to pressure, speed, temperature and the like. Control means are supplied with a desired torque value for generating a control signal for actuating the control element. Pick-up means are connected to the control means and to the control element for picking up a pivotal angle .alpha. or an eccentricity E, respectively, representing an actual displacement volume of the hydrostatic machine. The pivotal angle .alpha. and the eccentricity E are measured in either an analog or a digital manner. When measured in an analog manner, the desired value of the pivotal angle is .alpha.=M/P and the desired value of the eccentricity is E=M/P, where M is the torque and P is the pressure. When measured in a digital manner, the desired value for the pivotal angle and the eccentricity, respectively, are determined from previously determined measured values.

Abstract translation: 一种用于控制连接到具有压缩工作压力的液压系统的静液压机器的输出扭矩的电路装置。 电路装置具有用于根据对应于压力，速度，温度等的操作参数改变机器的输出转矩的控制元件。 控制装置被提供有期望的扭矩值，用于产生用于致动控制元件的控制信号。 拾取装置连接到控制装置和控制元件，用于分别拾取表示静液压机器的实际排量的枢轴角α或偏心度E。 枢轴角α和偏心率E以模拟或数字方式测量。 当以模拟方式测量时，枢转角度的期望值为α= M / P，偏心率的期望值为E = M / P，其中M为转矩，P为压力。 当以数字方式测量时，分别根据先前确定的测量值确定枢转角度和偏心率的期望值。