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：US06286412B1

公开(公告)日：2001-09-11

申请号：US09444624

申请日：1999-11-22

Applicant: Noah D. Manring ,  Lifei Yu

Inventor： Noah D. Manring ,  Lifei Yu

IPC: F15B1110

CPC classification number: F15B21/087 ,  E02F9/2228 ,  E02F9/2285 ,  F15B11/05 ,  F15B2211/30525 ,  F15B2211/327 ,  F15B2211/365 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/632 ,  F15B2211/6326 ,  F15B2211/634 ,  F15B2211/665

Abstract: An electrohydraulic valve control system which enables simultaneous flow and pressure control for operating an implement or other work element associated with a work machine through the use of a single control valve design, the present control system comparing the actual valve output flow rate of the hydraulic fluid flowing through the valve to a desired valve output flow rate and thereafter modifying the input flow rate to the valve based upon the difference between the actual valve output flow rate and the desired valve output flow rate. The desired valve output flow rate is determined based upon the actual load pressure being exerted against the implement or work element and the operator input signal generated by the operator upon activation of an operator input control mechanism used to control the operation of the implement or work element. In this regard, the control system stores a plurality of pressure-flow curves, which determine the desired valve, output flow rate based upon the actual load pressure and the operator input signal. The actual valve output flow rate is determined through the use of a flow sensor, or through the use of a flow rate calculator which uses the output signal from various pressure sensors and a spool displacement sensor to calculate the actual valve output flow rate based upon inputs from the appropriate sensors.

Abstract translation: 一种电动液压阀控制系统，其通过使用单个控制阀设计，能够同时进行流量和压力控制，以操作与作业机器相关联的工具或其它工作元件，本控制系统将液压流体的实际阀输出流量进行比较 流过阀门到期望的阀输出流量，然后基于实际阀输出流量与期望的阀输出流量之间的差异来改变阀的输入流量。 所需的阀输出流量是基于施加在工具或工件上的实际负载压力和操作员在激活用于控制工具或工件的操作的操作者输入控制机构时产生的操作者输入信号来确定的 。 在这方面，控制系统存储多个压力流曲线，其根据实际负载压力和操作员输入信号确定期望的阀门，输出流量。 通过使用流量传感器或通过使用流量计算器来确定实际的阀输出流量，其使用来自各种压力传感器的输出信号和阀芯位移传感器来基于输入来计算实际阀输出流量 从适当的传感器。

公开(公告)号：US06468046B1

公开(公告)日：2002-10-22

申请号：US09665242

申请日：2000-09-18

Applicant: Hongliu Du ,  Noah D. Manring

Inventor： Hongliu Du ,  Noah D. Manring

IPC: F04B126

CPC classification number: F04B49/002 ,  F04B1/324

Abstract: An apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump. The apparatus and method includes a swashplate pivotally attached to the pump, a control servo operable to increase an angle of the swashplate relative to the pump, a biasing servo operable to decrease the angle of the swashplate relative to the pump, a servo valve having an output port hydraulically connected to the control servo, a divertor line having a first end connected to the pump output port and a second end connected to the biasing servo, and means for controlling the servo valve as a function of the discharge pressure of the pump.

Abstract translation: 一种用于控制可变排量液压泵的排出压力的装置和方法。 该装置和方法包括枢转地附接到泵的斜盘，可操作以增加斜盘相对于泵的角度的控制伺服机构，可操作以减小斜盘相对于泵的角度的偏压伺服器，具有 液压连接到控制伺服的输出端口，具有连接到泵输出端口的第一端和连接到偏压伺服器的第二端的偏滤器线路，以及用于根据泵的排出压力控制伺服阀的装置。

公开(公告)号：US5567123A

公开(公告)日：1996-10-22

申请号：US526830

申请日：1995-09-12

Applicant: Dale B. Childress ,  Noah D. Manring

Inventor： Dale B. Childress ,  Noah D. Manring

IPC: F04B49/00 ,  F04B13/00 ,  F04B49/08 ,  F16K31/124

CPC classification number: F04B49/08 ,  F04B2201/1202 ,  F04B2201/1204

Abstract: A pump displacement control for a variable displacement pump includes a torque control valve disposed between a variable torque limiter and a force applying device disposed in axial alignment within a common bore. A sleeve and a valve spool are movable relative to each other to establish a first condition communicating discharge pressure into an actuator chamber to move a swashplate toward a minimum displacement position against the bias of a spring or a second condition communicating the actuating chamber with an exhaust passage to allow the spring to move the swashplate toward its maximum displacement position. A torque control piston disposed between opposing springs resiliently bias the valve spool in a direction to establish the second condition when control fluid is directed into a control chamber. Pump discharge pressure communicated into a pressure chamber exerts a force against the valve spool proportional to the discharge pressure so that the valve spool moves in a second direction to establish the first condition when the control force exceeds the biasing force exerted by the torque limiter.

Abstract translation: 用于可变排量泵的泵排量控制器包括设置在可变扭矩限制器和在公共孔内轴向对准设置的施力装置之间的扭矩控制阀。 套管和阀芯可相对于彼此移动以建立将排放压力连通到致动器室中的第一状态，以克服弹簧的偏压将斜盘移向最小位移位置，或者使致动室与排气连通的第二状态 通道以允许弹簧将斜盘移向其最大位移位置。 设置在相对弹簧之间的扭矩控制活塞在控制流体被引导到控制室中时沿一个方向弹性地偏压阀芯以建立第二状态。 连通到压力室的泵排出压力与排出压力成比例地施加抵抗阀芯的力，使得阀芯在第二方向上移动，以在控制力超过扭矩限制器施加的偏压力时建立第一状态。

公开(公告)号：US08790091B2

公开(公告)日：2014-07-29

申请号：US13116709

申请日：2011-05-26

Applicant: Viral S. Mehta ,  Noah D. Manring ,  Hongliu Du ,  Bryan E. Nelson

Inventor： Viral S. Mehta ,  Noah D. Manring ,  Hongliu Du ,  Bryan E. Nelson

IPC: F04B1/32

CPC classification number: F04B1/306

Abstract: A pump is disclosed. The pump may have a housing, a body rotatably disposed within the housing and at least partially defining a plurality of barrels, a plurality of plungers associated with the plurality of barrels, and a swashplate tiltable by a swivel torque to vary a displacement of the plurality of plungers relative to the plurality of barrels. The pump may also have a port plate with an inlet port, a discharge port, and a protrusion. The port plate may be configured to engage an end of the rotatable body. The pump may further have at least one piston disposed within the housing and configured to selectively engage the protrusion of the port plate to rotate the port plate and adjust the swivel torque.

Abstract translation: 公开了一种泵。 泵可以具有壳体，可旋转地设置在壳体内并且至少部分地限定多个筒的主体，与多个筒相关联的多个柱塞，以及可由旋转扭矩倾斜以改变多个筒的位移的斜盘 的柱塞相对于多个筒。 泵还可以具有带有入口端口，排放口和突起的端口板。 端口板可以构造成接合可旋转主体的端部。 泵还可以具有设置在壳体内的至少一个活塞并且构造成选择性地接合端口板的突起以旋转端口板并调节旋转扭矩。

公开(公告)号：US5564905A

公开(公告)日：1996-10-15

申请号：US324564

申请日：1994-10-18

Applicant: Noah D. Manring

Inventor： Noah D. Manring

IPC: F04B1/20 ,  F04B1/30 ,  F04B1/32

CPC classification number: F04B1/2021 ,  F04B1/303

Abstract: A variable displacement axial piston hydraulic unit includes a flat port plate disposed between a stationery head and a rotatable cylinder barrel. An arcuate actuator piston extends from the port plate and is slidably disposed within an arcuate pocket in the head to define an actuator chamber. Similarly, an arcuate biasing piston extends from the port plate and is slidably disposed within an arcuate pocket defining a biasing chamber which continuously communicates with a discharge passage in the head. By selectably rotating the port plate relative to the head, the amount of fluid pressure carryover through TDC and BDC can be varied, thereby changing the swivel torque acting on the swashplate so that the swivel torque can be utilized to actually control the position of the swashplate. The rotational position of the port plate is controlled by controllably introducing pressurized fluid into the actuating chamber.

Abstract translation: 可变排量轴向柱塞液压单元包括设置在文具头和可旋转气缸筒之间的平口板。 弓形致动器活塞从端口板延伸并且可滑动地设置在头部中的弓形凹槽内以限定致动器室。 类似地，弓形偏压活塞从端口板延伸并且可滑动地设置在限定与头部中的排放通道连续连通的偏压室的弓形凹穴内。 通过相对于头部可选地旋转端口板，可以改变通过TDC和BDC的流体压力携带量，从而改变作用在斜盘上的旋转扭矩，使得旋转扭矩可以用于实际控制斜盘的位置 。 通过将加压流体可控地引入致动室来控制端口板的旋转位置。

公开(公告)号：US06374722B1

公开(公告)日：2002-04-23

申请号：US09697831

申请日：2000-10-26

Applicant: Hongliu Du ,  Noah D. Manring

Inventor： Hongliu Du ,  Noah D. Manring

IPC: F01B300

CPC classification number: F04B1/324 ,  F04B49/002

Abstract: An apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump. The apparatus and method includes a swashplate pivotally attached to the pump, a valve plate located on the pump to allow hydraulic fluid to enter the pump through an intake port on the valve plate, and to exit the pump through a discharge port on the valve plate, the hydraulic fluid entering and exiting the pump responsively creating a pressure carry over angle &ggr;, a control servo operable to control an angle of the swashplate relative to the pump, a servo valve having an output port hydraulically connected to the control servo and an input port hydraulically connected to the pump output port, and means for controlling the servo valve as a function of the discharge pressure of the pump and responsively balancing a torque induced by the pressure carry over angle &ggr; with a torque generated by a control pressure Pc at the control servo.

Abstract translation: 一种用于控制可变排量液压泵的排出压力的装置和方法。 该装置和方法包括可枢转地附接到泵的斜盘，位于泵上的阀板，以允许液压流体通过阀板上的进气口进入泵，并通过阀板上的排出口离开泵 响应于进入和离开泵的液压流体响应于产生压力承载角γ，控制伺服可操作以控制斜盘相对于泵的角度;伺服阀，具有液压连接到控制伺服的输出端口和输入端 液压连接到泵输出端口的端口，以及用于根据泵的排出压力来控制伺服阀的装置，并且响应于将由压力承载角γ引起的转矩与由控制压力Pc产生的转矩平衡 控制伺服

公开(公告)号：US5568762A

公开(公告)日：1996-10-29

申请号：US421584

申请日：1995-04-12

Applicant: Noah D. Manring

Inventor： Noah D. Manring

IPC: F04B1/12 ,  F01B29/00 ,  F01B3/00

CPC classification number: F04B1/124

Abstract: A piston for a variable displacement axial piston hydraulic pump has a vibration absorber disposed within a chamber of the piston. The vibration absorber includes a vibration absorber mass suspended between a pair of springs. The vibration absorber offsets the piston inertia created from the oscillatory displacement of the pistons for stabilizing the pump.

Abstract translation: 用于可变排量轴向柱塞液压泵的活塞具有设置在活塞的室内的减震器。 减震器包括悬挂在一对弹簧之间的减振器。 振动吸收器抵消由活塞的振荡位移产生的活塞惯性，以稳定泵。

公开(公告)号：US5562424A

公开(公告)日：1996-10-08

申请号：US527134

申请日：1995-09-12

Applicant: Noah D. Manring

Inventor： Noah D. Manring

IPC: F04B49/08

CPC classification number: F04B49/08 ,  F04B2201/1202 ,  F04B2201/1204

Abstract: A pump displacement control for a variable displacement pump includes a torque control valve serially disposed between a remotely controllable displacement control valve and a variable torque limiter in axial alignment within a common bore. A displacement control sleeve is disposed within the bore for normally controlling the fluid pressure in an actuating chamber of an actuator connected to a swashplate of the pump when the pump discharge pressure is below a predetermined high pressure. The torque control valve assumes control of pump displacement when the pump discharge pressure exceeds the predetermined high pressure and includes a sleeve and a valve spool movable relative to each other to establish a first condition communicating discharge pressure into the actuator chamber to move the swashplate toward a minimum displacement position or a second condition communicating the actuating chamber with an exhaust passage so that the swashplate is moved toward its maximum displacement position. A feedback piston continuously subjected to pump discharge pressure moves the valve spool in a direction to establish the first condition when discharge pressure exceeds the predetermined high pressure. The feedback piston is disposed in axial alignment with the valve spool within an insert disposed within the displacement control sleeve. The predetermined high pressure is varied by increasing or decreasing the level of a control pressure directed into a bore receiving a piston acting on the opposite end of the valve spool.

Abstract translation: 用于可变排量泵的泵排量控制器包括串联地设置在可控位移控制阀和在公共孔内轴向对准的可变扭矩限制器之间的扭矩控制阀。 位移控制套筒设置在孔内，用于当泵排出压力低于预定高压时，正常地控制连接到泵的斜盘的致动器的致动室中的流体压力。 当泵排出压力超过预定的高压时，转矩控制阀采取泵排量的控制，并且包括可相对于彼此移动的套筒和阀芯，以建立将排出压力连接到致动器室中的第一状态，以使斜盘朝向 最小位移位置或使致动室与排气通道相通的第二条件，使得斜盘向其最大位移位置移动。 连续经受泵排出压力的反馈活塞在排出压力超过预定高压时使阀芯沿一个方向移动以建立第一条件。 所述反馈活塞在位于所述位移控制套筒内的插入件内与所述阀芯轴向对准地设置。 预定的高压通过增加或减小引导到接收作用在阀芯的相对端上的活塞的孔中的控制压力的水平来改变。