公开(公告)号：WO2012173815A2

公开(公告)日：2012-12-20

申请号：PCT/US2012/040874

申请日：2012-06-05

Applicant: CATERPILLAR INC. ,  DEMICK, Christopher, J. ,  DVORAK, Paul ,  SWICK, William ,  GUYARD, Vincent ,  ELLIOTT, Christopher ,  PRUESS, Christopher

Inventor： DEMICK, Christopher, J. ,  DVORAK, Paul ,  SWICK, William ,  GUYARD, Vincent ,  ELLIOTT, Christopher ,  PRUESS, Christopher

IPC: F15B21/08 ,  F15B13/043 ,  F16K31/04 ,  F16K17/06

CPC classification number: F16D31/00 ,  F15B21/042 ,  F15B2211/20553 ,  F15B2211/611 ,  F15B2211/7058 ,  F16H61/4104

Abstract: A closed hydrostatic circuit (10) with variable charge and variable flushing systems is disclosed. A variable displacement charge pump (47) is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve (43) is in communication with an output of the charge pump (47) and is linked to a controller (41). When the hydrostatic control system (10) detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve (43), that is in communication with an output of the charge pump (47) and that is linked to a controller (41), increases the charge pump (47) flow. A bidirectional variable displacement hydrostatic motor (14) is connected in parallel to two input/output lines (16). A flush valve (15) is in communication with the hydrostatic motor (14) and both input/output lines (16). The flush valve (15) and hydrostatic motor (14) are both in communication with the flush orifice and a flush relief valve (22). When the pressure regulating valve (43) causes the charge pump (47) to operate at or near a full capacity, fluid exits the flush valve (15) and passes through both the flush orifice and the flush relief valve (22). In contrast, when the pressure regulating valve (43) causes the charge pump (47) to operate at a lower or near minimum capacity, fluid exits the flush valve (15) and passes through the flush orifice only without passing through the flush relief valve (22).

Abstract translation: 公开了具有可变电荷和可变冲洗系统的封闭静液压回路（10）。 可变容量电荷泵（47）被配置为向静液压回路供应充液流体和先导控制流体。 电子控制压力调节阀（43）与电荷泵（47）的输出端连通并连接到控制器（41）。 当静液压控制系统（10）检测到高液压温度条件时，与电荷泵（47）的输出连通且与控制器（41）连接的电控压力调节阀（43） 增加电荷泵（47）的流量。 双向可变排量静液压马达（14）并联连接到两个输入/输出线（16）。 冲洗阀（15）与静液压马达（14）和两个输入/输出线（16）连通。 冲洗阀（15）和静液压马达（14）都与冲洗孔和冲水安全阀（22）连通。 当压力调节阀（43）使得电荷泵（47）以满容量运行或接近满容量时，流体离开冲洗阀（15）并通过冲洗孔和冲洗溢流阀（22）。 相反，当压力调节阀（43）使得电荷泵（47）以较低或接近最小容量运行时，流体离开冲洗阀（15）并仅通过冲洗孔而不通过冲洗溢流阀 （22）。

公开(公告)号：WO2012082357A2

公开(公告)日：2012-06-21

申请号：PCT/US2011/062381

申请日：2011-11-29

Applicant: CATERPILLAR INC. ,  HAND, Timothy ,  ARMISTEAD, Heather ,  SAYEED, Fuaad ,  PURANAM, Srikalyan ,  GARNETT, Stephen

Inventor： HAND, Timothy ,  ARMISTEAD, Heather ,  SAYEED, Fuaad ,  PURANAM, Srikalyan ,  GARNETT, Stephen

IPC: F15B13/043 ,  E02F9/22 ,  F15B13/02

CPC classification number: E02F3/844 ,  E02F3/7609 ,  E02F3/815 ,  E02F3/845 ,  E02F9/2004 ,  E02F9/2235 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0416 ,  F15B13/043 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/3144 ,  F15B2211/329 ,  F15B2211/6054

Abstract: A hydraulic system (76) for a machine (10) is disclosed. The hydraulic system may have a tank (78) configured to hold a supply of fluid, a pump (80) configured to draw fluid from the tank and pressurize the fluid, a first cylinder (34) operatively connected between a first side of a work tool (14) and an undercarriage (42) of the machine, and a second cylinder (36) operatively connected between a second side of the work tool and the undercarriage of the machine. The hydraulic system may also have a first electro-hydraulic valve (96) associated with the first cylinder and configured to selectively regulate a flow of pressurized fluid to the first cylinder independently of the second cylinder, and a second electro-hydraulic valve (98) associated with the second cylinder and configured to selectively regulate a flow of pressurized fluid to the second cylinder independently of the first cylinder.

Abstract translation: 公开了一种用于机器（10）的液压系统（76）。 液压系统可以具有构造成保持流体供应的罐（78），构造成从罐抽出流体并对流体加压的泵（80），可操作地连接在工件的第一侧之间的第一缸（34） 工具（14）和起落架（42），以及可操作地连接在作业工具的第二侧和机器起落架之间的第二缸（36）。 液压系统还可以具有与第一气缸相关联的第一电动液压阀（96），并且构造成选择性地将加压流体的流量独立于第二气缸调节到第一气缸，以及第二电动液压阀（98） 与第二气缸相关联并且被配置为独立于第一气缸选择性地调节加压流体到第二气缸的流动。

公开(公告)号：WO2015108817A1

公开(公告)日：2015-07-23

申请号：PCT/US2015/011023

申请日：2015-01-12

Applicant: CATERPILLAR INC.

Inventor： ZHANG, Jiao ,  MA, Pengfei ,  MURUGESAN, Vickram ,  SHANG, Tonglin ,  HILLMAN, Bryan, Jacob

IPC: E02F9/14 ,  E02F9/20 ,  F15B21/14

CPC classification number: F15B21/14 ,  E02F9/2228 ,  E02F9/2296 ,  F15B11/006 ,  F15B11/024 ,  F15B2211/30535 ,  F15B2211/30575 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7053 ,  F15B2211/761

Abstract: A hydraulic system and methods for conserving energy in such system is disclosed. The hydraulic system includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump that pumps fluid to the actuator, a first valve disposed downstream of the rod end, and a second valve disposed between the pump and the head end of the actuator. When the system is in a load overrunning condition, the second valve is partially closed to restrict the flow of a combined fluid. The combined fluid including fluid received from the pump and fluid received from the rod end of the actuator. When the system is in the light resistive load condition, the second valve is open to allow the combined fluid to flow through the second valve.

Abstract translation: 公开了一种在这种系统中节约能量的液压系统和方法。 液压系统包括具有头端，杆端和设置在其间的活塞的液压致动器。 该系统还包括将流体泵送到致动器的泵，设置在杆端下游的第一阀，以及设置在泵和致动器的头端之间的第二阀。 当系统处于负载超限状态时，第二阀部分关闭以限制组合流体的流动。 包括从泵接收的流体和从致动器的杆端接收的流体的组合流体。 当系统处于轻负载状态时，第二阀打开以允许组合的流体流过第二阀。

公开(公告)号：WO2014120413A1

公开(公告)日：2014-08-07

申请号：PCT/US2014/011072

申请日：2014-01-10

Applicant: CATERPILLAR INC.

Inventor： ELLIOTT, Christopher

IPC: E02F9/20 ,  E02F9/02

CPC classification number: E02F9/2253 ,  E02F9/2296 ,  F16H61/0213 ,  F16H2059/663 ,  F16H2061/0237 ,  F16H2061/166 ,  Y10T477/631 ,  Y10T477/65

Abstract: A manner of managing operation of a machine (100) is described for preventing damage/wear to movable machine components arising from operation of the machine/parts at excessive speed while the machine (100) is traveling down a steep incline. The managing of the machine operation includes determining a downhill slope value (THETA) in a machine direction of travel and then establishing a maximum commanded transmission output speed (max commanded motor speed) in accordance with the determined downhill slope value (THETA). Thereafter a maximum commanded gear ratio is established, for a transmission having a variable gear ratio, based upon the maximum commanded transmission output speed (max commanded motor speed) and a current engine speed. A controller compares the maximum commanded variable gear ratio to an operator requested gear ratio, and a target gear ratio is established for the variable gear ratio of the transmission based upon a minimum of the compared commanded variable gear ratio and the operator requested gear ratio.

Abstract translation: 描述了一种管理机器（100）的操作的方式，用于防止当机器（100）沿着陡峭的倾斜行进时以超速运转引起的对机器/部件的运动造成的损坏/磨损。 机器操作的管理包括确定行进方向上的下坡坡度值（THETA），然后根据确定的下坡坡度值（THETA）建立最大指令传输输出速度（最大指令电机速度）。 此后，基于最大指令传输输出速度（最大指令电机速度）和当前发动机转速，建立具有可变齿轮比的变速器的最大指令齿轮比。 控制器将最大指令可变齿轮比与操作员所要求的齿轮比进行比较，并且基于所比较的指令可变齿轮比和操作者所要求的齿轮比的最小值，确定变速器的可变齿轮比的目标齿轮比。

公开(公告)号：WO2014071130A1

公开(公告)日：2014-05-08

申请号：PCT/US2013/067968

申请日：2013-11-01

Applicant: CATERPILLAR INC.

Inventor： BUCKLEY, Christ Paul ,  SHINOGLE, Ronald Dean ,  JOHNSON, Ryan A. ,  GIACOMI, Matthew Paul

IPC: F04B17/00 ,  F04B53/16

CPC classification number: F04B23/06 ,  F04B15/02 ,  F04B49/16 ,  F04B53/16

Abstract: A variable capacity plunger pump (10) includes a housing assembly (15) defining a housing bore (67) that may be configured to receive a liner (73) along at least a portion of the housing bore. An axial plunger (14) slidably disposed within the housing bore (67) to form a compression chamber disposed between a distal end (21) of the plunger (14) and the outlet (12). The compression chamber is in axial alignment with the outlet (12). The plunger (14) is configured to receive fluid from the inlet (25) and pass fluid to the compression chamber. When the plunger (14) is at a first position, the compression chamber is at a first volume to receive fluid from the plunger (14) at a first pressure. When the plunger (14) is at a second position, the compression chamber is at a smaller second volume to pressurize the fluid within the compression chamber to a higher second pressure. The fluid at the second pressure is discharged from the compression chamber into the outlet (12).

Abstract translation: 可变容量柱塞泵（10）包括限定容纳孔（67）的壳体组件（15），壳体孔可以被构造成沿着壳体孔的至少一部分接纳衬套（73）。 可滑动地设置在所述壳体孔（67）内的轴向柱塞（14），以形成设置在所述柱塞（14）的远端（21）和所述出口（12）之间的压缩室。 压缩室与出口（12）轴向对准。 柱塞（14）构造成从入口（25）接收流体并将流体传递到压缩室。 当柱塞（14）处于第一位置时，压缩室处于第一体积以在第一压力下从柱塞（14）接收流体。 当柱塞（14）处于第二位置时，压缩室处于较小的第二体积，以将压缩室内的流体加压至较高的第二压力。 第二压力下的流体从压缩室排出到出口（12）中。

公开(公告)号：WO2014070816A1

公开(公告)日：2014-05-08

申请号：PCT/US2013/067376

申请日：2013-10-30

Applicant: CATERPILLAR INC.

Inventor： WEN, Gang, Victor ,  MA, Pengfei ,  ZHANG, Jiao ,  SHANG, Tonglin

IPC: E02F3/43 ,  E02F9/22

CPC classification number: E02F9/2296 ,  E02F9/123 ,  E02F9/2217 ,  E02F9/2242 ,  E02F9/2292 ,  F15B1/027 ,  F15B1/0275 ,  F15B11/17 ,  F15B13/06 ,  F15B21/14 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/7058 ,  F15B2211/7135

Abstract: An energy recovery system (50) for a machine (10) is disclosed. The energy recovery system may have a boom circuit (54) with at least a one linear actuator (28) configured to move a work tool (16), and a boom accumulator (236) configured to selectively collect pressurized fluid from the at least one linear actuator and to discharge pressurized fluid back to the at least one linear actuator. The energy recovery system may also have a swing circuit (52) with a swing motor (49) configured to move the work tool, and a swing accumulator (108) configured to selectively collect pressurized fluid from the swing motor and discharge pressurized fluid back to the swing motor. The energy recovery system may further have a common accumulator passage (266) fluidly connecting the boom accumulator and the swing accumulator.

Abstract translation: 公开了一种用于机器（10）的能量回收系统（50）。 能量回收系统可以具有吊杆回路（54），其中至少一个线性致动器（28）构造成移动作业工具（16），并且悬臂收集器（236）构造成选择性地从至少一个 线性致动器并将加压流体排回到至少一个线性致动器。 能量回收系统还可以具有摆动回路（52），摆动马达（49）构造成移动作业工具，以及摆动储存器（108），其构造成选择性地从回转马达收集加压流体并且将加压流体排回到 摆动马达。 能量回收系统还可以具有流体连接起重臂蓄能器和摆动蓄能器的公共蓄能器通道（266）。

公开(公告)号：WO2013096030A1

公开(公告)日：2013-06-27

申请号：PCT/US2012/069047

申请日：2012-12-12

Applicant: CATERPILLAR INC.

Inventor： CONTRATTO, Michael, S. ,  LEWIS II, Charles, E. ,  SPANGLER JR., John, C. ,  CATTON, Jonathan, C.

IPC: B60N2/50

CPC classification number: B60N2/501 ,  B60N2/502 ,  B60N2/505 ,  B60N2/508 ,  B60N2/525 ,  B60N2/527 ,  B60N2/544

Abstract: A suspension system (30) for a mobile machine (12) is disclosed. The suspension system may have at least one sensor (68) configured to detect a performance parameter of the mobile machine, and a seat (26) operatively connected to a cabin floor (28) of the mobile machine. The suspension system may also have a cylinder (44) connected between the seat and the cabin floor, and a spring (46) associated with the cylinder. The suspension system may additionally have a controller (54) in communication with the at least one sensor. The controller may be configured to make a classification of an operation currently being performed by the mobile machine based on input from the at least one sensor, and to select for use in controlling movement of at least one of the cylinder and the spring one of a plurality of available maps stored in the memory of the controller based on the classification.

Abstract translation: 公开了一种用于移动机器（12）的悬挂系统（30）。 悬架系统可以具有被配置为检测移动机器的性能参数的至少一个传感器（68）和可操作地连接到移动机器的机舱地板（28）的座（26）。 悬架系统还可以具有连接在座椅和机舱地板之间的气缸（44）和与气缸相关联的弹簧（46）。 悬挂系统可以另外具有与至少一个传感器通信的控制器（54）。 控制器可以被配置为基于来自至少一个传感器的输入来对移动机器当前正在执行的操作进行分类，并且被选择用于控制气缸和弹簧中的至少一个的移动 基于分类，存储在控制器的存储器中的多个可用映射。

公开(公告)号：WO2012082354A3

公开(公告)日：2012-06-21

申请号：PCT/US2011/062357

申请日：2011-11-29

Applicant: CATERPILLAR INC. ,  FERRAZ, John ,  EGELJA, Aleksandar ,  MA, Pengfei ,  BESCHORNER, Matthew

Inventor： FERRAZ, John ,  EGELJA, Aleksandar ,  MA, Pengfei ,  BESCHORNER, Matthew

IPC: F15B13/02 ,  E02F9/22 ,  F16K31/12

Abstract: An independent metering valve (24) (IMV) assembly is disclosed that includes a metering stem (21) including an inlet (29). The IMV assembly also includes a hydro-mechanical control valve (37) in communication with a fluid source and the inlet (29). The control valve (37) also including a spool (43) with a closed end (46) and an open end (42). The control valve (37) includes a biasing member (48) that biases the control valve (37) or spool (43) towards an open position thereby establishing communication between the fluid source and the inlet (29). The control valve (37) also including a load signal line (45) providing communication between an outlet (18) of the control valve (37) upstream of the inlet (29) and the closed end (46) of the spool (43). Wherein high pressure in the load signal line (45) allowing the control valve (37) to move towards a closed position thereby overcoming bias of the biasing member (48) and reducing flow to the inlet (29) during a high pressure condition.

公开(公告)号：WO2014036229A1

公开(公告)日：2014-03-06

申请号：PCT/US2013/057238

申请日：2013-08-29

Applicant: CATERPILLAR INC.

Inventor： ZHANG, Jiao ,  MA, Pengfei ,  SHANG, Tonglin ,  CESUR, Rustu ,  HILLMAN, Bryan, J. ,  SPRING, Peter ,  TOGNETTI, Lawrence, J. ,  PETERSON, Randal, N. ,  CHEN, Dayao

IPC: F15B21/08 ,  E02F9/22 ,  F15B1/02 ,  F15B13/02

CPC classification number: F15B21/14 ,  F15B1/024 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/7058 ,  F15B2211/75 ,  F15B2211/755 ,  F15B2211/88

Abstract: A hydraulic control system (50) is disclosed for use with a machine (10). The hydraulic control system may have a tank (60), a pump (58), a swing motor (49), and at least one control valve (56) configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator (108) configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve (122, 124), and a controller (100). The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating.

Abstract translation: 公开了一种与机器（10）一起使用的液压控制系统（50）。 液压控制系统可以具有罐（60），泵（58），回转马达（49）和至少一个控制阀（56），其被配置成控制泵，回转马达和罐之间的流体流动 。 液压系统还可以具有蓄能器（108），该蓄能器被配置为选择性地接收从回转马达排出的加压流体，并且选择性地向加压流体供应回转马达，至少一个储能阀（122,124）和控制器（100）。 控制器可以被配置为接收指示回转马达的期望速度和实际速度之间的差异的输入，并且基于该差异来确定回转马达是加速还是减速。 控制器还可以被配置成控制至少一个蓄能阀，使得蓄能器仅在回转马达正在加速或减速时有选择地接收或供应加压流体。

公开(公告)号：WO2013184539A1

公开(公告)日：2013-12-12

申请号：PCT/US2013/043820

申请日：2013-06-03

Applicant: CATERPILLAR INC.

Inventor： ZHANG, Jiao ,  MA, Pengfei ,  SHANG, Tonglin ,  WEN, Gang, Victor ,  NELSON, Bryan, Edward ,  CHEN, Dayao

IPC: F15B15/18 ,  E02F9/22 ,  F15B13/02

CPC classification number: E02F9/2217 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/033 ,  F15B21/14 ,  F15B2211/20507 ,  F15B2211/20546 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/214 ,  F15B2211/30575 ,  F15B2211/3058 ,  F15B2211/6306 ,  F15B2211/6336 ,  F15B2211/6343 ,  F15B2211/6346 ,  F15B2211/7053 ,  F15B2211/7128 ,  F15B2211/761 ,  F15B2211/88

Abstract: A hydraulic system (50) includes a hydraulic actuator (30), a pump (54) configured to supply fluid to the hydraulic actuator (30), and a first accumulator (72) fluidly connected to the hydraulic actuator (30). The first accumulator (72) is configured to store fluid received from the hydraulic actuator (30). The hydraulic system (50) also includes a motor (84, 184, 284) drivingly connected to the pump (54) and fluidly connected to the first accumulator (72). The motor (84, 184, 284) is configured to receive the stored fluid from the first accumulator (72) to drive the pump (54). The hydraulic system (50) further includes a first discharge valve (78) fluidly connected between the first accumulator (72) and the hydraulic actuator (30). The first discharge valve (78) is configured to supply the stored fluid from the first accumulator (72) to the hydraulic actuator (30) without the stored fluid from the first accumulator (72) circulating through the pump (54).

Abstract translation: 液压系统（50）包括液压致动器（30），构造成向液压致动器（30）供应流体的泵（54）和与液压致动器（30）流体连接的第一蓄能器（72）。 第一蓄能器（72）构造成存储从液压致动器（30）接收的流体。 液压系统（50）还包括驱动地连接到泵（54）并且流体连接到第一蓄能器（72）的马达（84,184,284）。 电动机（84,184,284）构造成从第一蓄能器（72）接收存储的流体以驱动泵（54）。 液压系统（50）还包括流体连接在第一蓄能器（72）和液压致动器（30）之间的第一排放阀（78）。 第一排放阀78配置成将储存的流体从第一储液器72供给到液压致动器30，而没有来自第一储液器72的储存流体循环通过泵54。