Fluid control system for work vehicle
    54.
    发明授权
    Fluid control system for work vehicle 有权
    工作车辆流体控制​​系统

    公开(公告)号:US09347200B2

    公开(公告)日:2016-05-24

    申请号:US13487622

    申请日:2012-06-04

    摘要: A fluid control system including a variable displacement pump having a load system control and configured to operate in an open center mode. A pump control is operable between a first arrangement and a second arrangement. The pump control receives pressurized fluid from a first load sensor pressure in fluid communication with the pump and an actuator return pressure in fluid communication with an actuator configured to operate using pressurized fluid from the system, the pump control providing a selective pump control pressure to the pump load system control. When the system is operating in a standby mode, the pump operates in a first minimized displacement condition. When the system is in a stall mode, the pump operates in a second minimized displacement condition.

    摘要翻译: 一种流体控制系统,包括具有负载系统控制并被配置为以开放中心模式操作的可变排量泵。 泵控制器可在第一布置和第二布置之间操作。 泵控制器从与泵流体连通的第一负载传感器压力接收加压流体,并且致动器返回压力与构造成使用来自系统的加压流体进行操作的致动器流体连通,泵控制器向该控制器提供选择性泵控制压力 泵负载系统控制。 当系统在待机模式下运行时,泵在第一最小位移条件下运行。 当系统处于失速模式时,泵在第二最小位移条件下运行。

    Proportional flow control of a fluid pump assembly
    55.
    发明授权
    Proportional flow control of a fluid pump assembly 有权
    流体泵组件的比例流量控制

    公开(公告)号:US09323253B2

    公开(公告)日:2016-04-26

    申请号:US14136277

    申请日:2013-12-20

    申请人: Eaton Corporation

    IPC分类号: F15B11/04 G05D7/06 F15B11/042

    摘要: A pump control assembly having a flow control assembly disposed between the first end of a load sensing valve and a fluid pump is disclosed. The flow control assembly may include an orifice, a first valve assembly, and a second valve assembly. When the first valve assembly is in an open position and the second valve assembly is in a first position, fluid passing through the orifice is directed to a fluid reservoir and to the load sensing valve. When the first valve assembly is in a closed position and the second valve assembly is in a second position, all fluid passing through the orifice is directed to the load sensing valve. An electronic controller can be configured to transmit an output current to the first and second valve assemblies in response to an operational parameter of a prime mover supplying power to the fluid pump.

    摘要翻译: 公开了一种具有设置在负载感测阀的第一端和流体泵之间的流量控制组件的泵控制组件。 流量控制组件可以包括孔口,第一阀组件和第二阀组件。 当第一阀组件处于打开位置并且第二阀组件处于第一位置时,通过孔的流体被引导到流体储存器和负载感测阀。 当第一阀组件处于关闭位置并且第二阀组件处于第二位置时,通过孔的所有流体被引导到负载感测阀。 电子控制器可以被配置为响应于向动力泵提供动力的原动机的操作参数而将输出电流传输到第一和第二阀组件。

    Valve Block having a Valve Assembly
    56.
    发明申请
    Valve Block having a Valve Assembly 有权
    具有阀组件的阀块

    公开(公告)号:US20150101676A1

    公开(公告)日:2015-04-16

    申请号:US14515099

    申请日:2014-10-15

    申请人: Robert Bosch GmbH

    发明人: Steffen Knapper

    IPC分类号: G05D16/10

    摘要: A valve block includes a plurality of control valve disks that form a first block part and a second block part. A supply pressure for the control valve disks of the first block part is limited by a common pressure-limiting valve. The common pressure-limiting valve is arranged such that a prevailing load pressure registered by the control valve disks does not exceed a specific value. The supply pressure for the control valve disks of the second block part is not limited.

    摘要翻译: 阀块包括形成第一块部分和第二块部分的多个控制阀盘。 第一块部件的控制阀盘的供给压力由公共限压阀限制。 普通的限压阀被布置成使得由控制阀盘记录的主要负载压力不超过特定值。 第二块部的控制阀盘的供给压力没有限制。

    Hydraulic system
    57.
    发明授权
    Hydraulic system 有权
    液压系统

    公开(公告)号:US08701396B2

    公开(公告)日:2014-04-22

    申请号:US12838166

    申请日:2010-07-16

    IPC分类号: F15B11/02 F15B13/00

    摘要: A hydraulic system for an operator controlled machine, the system including at least one actuator for moving a machine component, a source of pressurized fluid for delivering pressurized fluid at a system pressure to a control valve which is operable under operator control, to control the flow of fluid from the source to the actuator at a load pressure, along a load pressure path, a flow control apparatus for controlling the flow of fluid from the source to the control valve, the flow control apparatus including an actuating part which is biased by a resilient device to a condition in which the flow control apparatus provides for a maximum flow of fluid to the control valve, actuating part movement by the resilient device being resisted by system pressure fluid and being supported by fluid at a control pressure, the control pressure being derived from the load pressure, and wherein the system includes a pressure control device to which the load pressure is communicated, the pressure control device being operated under operator control either to deliver the control pressure to the flow control device at load pressure or a modified pressure which is less than the load pressure.

    摘要翻译: 一种用于操作员控制机器的液压系统,该系统包括用于移动机器部件的至少一个致动器,用于将系统压力下的加压流体输送到可在操作员控制下操作的控制阀的加压流体源,以控制流量 在负载压力下沿着负载压力路径从流体到致动器的流体控制装置,用于控制从源到控制阀的流体流动的流量控制装置,流量控制装置包括一个致动部件,该致动部件被一个 弹性装置到达流动控制装置提供流体到控制阀的最大流量的状态,由弹性装置致动部件被系统压力流体抵抗并由控制压力下的流体支撑,控制压力为 来自所述负载压力,并且其中所述系统包括压力控制装置,所述负载压力与所述压力控制装置连通, 控制装置在操作员控制下操作,以便在负载压力或小于负载压力的改进压力下将控制压力传递到流量控制装置。

    Hydro-pneumatic system with pressure limiting valve
    58.
    发明授权
    Hydro-pneumatic system with pressure limiting valve 有权
    液压气动系统带限压阀

    公开(公告)号:US08689823B2

    公开(公告)日:2014-04-08

    申请号:US12446611

    申请日:2007-10-25

    摘要: A hydro-pneumatic system has an air powered motor driving a hydraulic pump with a pressure limiting valve that turns off air flow to the air motor when a hydraulic pressure output by the pump at a sense port of the valve reaches a certain limit. A valve element of the valve has spring, hydraulic and pneumatic sections, with an unbalanced area of the hydraulic section in a sealed pressure chamber of a cartridge that is part of the valve housing. The pneumatic section extends out one end of the cartridge to fill a bore between the air inlet and outlet ports when the pneumatic section is extended, and allow air to pass when it is retracted.

    摘要翻译: 液压气动系统具有驱动液压泵的空气动力马达,该液压泵具有压力限制阀,当在阀的感应端口处的泵输出的液压压力达到一定限度时,该压力限制阀将空气流向空气马达。 阀的阀元件具有弹簧,液压和气动部分,在作为阀壳体的一部分的盒的密封压力室中具有液压部分的不平衡区域。 当气动部分延伸时,气动部分延伸出筒的一端以填充空气入口和出口之间的孔,并允许空气在其缩回时通过。

    HYDRAULIC SYSTEM
    59.
    发明申请
    HYDRAULIC SYSTEM 审中-公开
    液压系统

    公开(公告)号:US20130280097A1

    公开(公告)日:2013-10-24

    申请号:US13866757

    申请日:2013-04-19

    发明人: Harish Narotham

    IPC分类号: F04B49/00

    摘要: A method includes providing a hydraulic pump with an outlet, a main orifice having an inlet communicating with the pump outlet, and a main orifice outlet. Further provided are a flow orifice, an amplification orifice, and an amplification orifice outlet, means for generating an output signal representative of a fluid pressure, and a pump controller for controlling the hydraulic pump in response to the output signal. The flow orifice and the amplification orifices each define an area, with these areas defining a ratio, and with the main orifice and the ratio being variable. The method includes operating the system in a first mode so as to define a first mode ratio and operating the system in a second mode so as to define a second mode ratio, so that the ratio is controlled differently in the first mode and the second mode.

    摘要翻译: 一种方法包括提供具有出口的液压泵,具有与泵出口连通的入口的主孔和主孔出口。 还提供了一个流量孔,一个放大孔和一个放大孔出口,用于产生代表流体压力的输出信号的装置,以及用于响应输出信号控制液压泵的泵控制器。 流量孔和扩张孔各限定一个区域,其中这些区域限定一个比例,并且主孔口和比例是可变的。 该方法包括以第一模式操作系统以定义第一模式比率并且以第二模式操作系统以便限定第二模式比率,使得在第一模式和第二模式中不同地控制该比率 。

    Hydraulic valve arrangement
    60.
    发明授权
    Hydraulic valve arrangement 有权
    液压阀装置

    公开(公告)号:US07975598B2

    公开(公告)日:2011-07-12

    申请号:US11956917

    申请日:2007-12-14

    IPC分类号: F15B13/042

    摘要: The invention concerns a hydraulic valve arrangement (1) with a supply connection arrangement comprising a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement comprising two working connections (A, B), which can be connected to a motor (4), a directional valve arrangement (5) located between the supply connection arrangement (P, T) and the working connection arrangement (A, B), and a compensation valve (15) acted upon in a first activation direction by a pressure in a first pressure chamber (33), which is connected to a load-sensing pipe (LS), and, if required, by a spring (32), and in a second activation direction opposite to the first activation direction by a pressure downstream of the directional valve arrangement (5), said pressure acting in a second pressure chamber (34), the compensation valve (15) having an inlet (14) and an outlet (19). In connection with a post-compensated valve, it is endeavored to adjust the load pressures at the working connections (A, B) in dependence of the direction. For this purpose, each working connection (A, B) is connected to a control system, which amplifies the effect of the pressure in the first pressure chamber (33) on the compensation valve (15) in dependence of a pressure ruling at the working connection (A, B).

    摘要翻译: 本发明涉及具有包括高压连接(P)和低压连接(T)的供应连接装置的液压阀装置(1),包括两个工作连接(A,B)的工作连接装置,其可以 连接到电动机(4),位于供应连接装置(P,T)和工作连接装置(A,B)之间的方向阀装置(5)和补偿阀(15) 通过连接到负载传感管(LS)的第一压力室(33)中的压力,以及如果需要,通过弹簧(32)和在与第一激活相反的第二激活方向上的压力的激活方向 方向阀装置(5)下游的压力,所述压力作用在第二压力室(34)中,补偿阀(15)具有入口(14)和出口(19)。 结合补偿后阀门,努力根据方向调整工作连接(A,B)的负载压力。 为此,每个工作连接(A,B)连接到控制系统,该控制系统根据工作中的压力判定放大第一压力室(33)中的压力对补偿阀(15)的影响 连接(A,B)。