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1. 发明申请

WO2012166589A1 HYDRAULIC FAN CIRCUIT 审中-公开
标题翻译：液压风扇电路
公开(公告)号：WO2012166589A1
公开(公告)日：2012-12-06
申请号：PCT/US2012/039554
申请日：2012-05-25
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , PETERSON, Jeremy, T.
发明人： NELSON, Bryan, E. , PETERSON, Jeremy, T.
IPC分类号： F15B15/18 , F15B13/042 , F15B13/044
CPC分类号： F16H61/4026 , B60K2025/026 , F01P7/044 , F15B7/005 , F15B7/008 , F15B2211/20523 , F15B2211/20546 , F15B2211/20569 , F15B2211/212 , F15B2211/613 , F15B2211/7058 , F16H61/4104 , F16H61/438
摘要： A hydraulic fan circuit (10) includes a primary pump (14), a motor (18) fluidly connected to the primary pump (14), and a fan (20) operably connected to and driven by the motor (18). The circuit (10) also includes a supply passage (26) extending from the primary pump (14) to the motor (18), a return passage (24) extending from the motor (18) to the primary pump (14), and a pressure limiting valve (54) configured to selectively reduce pressure of a flow of pilot fluid directed to the primary pump (14). The circuit (10) further includes an override valve (66) configured to selectively connect the supply passage (26) to the pressure limiting valve (54).
摘要翻译：液压风扇回路（10）包括主泵（14），与主泵（14）流体连接的马达（18）和可操作地连接到马达（18）并由马达（18）驱动的风扇（20）。电路（10）还包括从主泵（14）延伸到马达（18）的供给通道（26），从马达（18）延伸到主泵（14）的返回通道（24），以及压力限制阀（54）被构造成选择性地降低引导到主泵（14）的先导流体的流动的压力。电路（10）还包括被配置为选择性地将供给通道（26）连接到限压阀（54）的超控阀（66）。

2. 发明申请

WO2013009467A2 HYDRAULIC ACCUMULATOR FLUID CHARGE ESTIMATION SYSTEM AND METHOD 审中-公开
标题翻译：液压蓄能器流量计算系统及方法
公开(公告)号：WO2013009467A2
公开(公告)日：2013-01-17
申请号：PCT/US2012/044287
申请日：2012-06-27
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , PETERSON, Jeremy, T. , KUEHN, Jeffrey, L.
发明人： NELSON, Bryan, E. , PETERSON, Jeremy, T. , KUEHN, Jeffrey, L.
IPC分类号： F15B19/00 , E02F9/22 , F15B1/02
CPC分类号： G01M99/00
摘要： A method for estimating a fluid charge of a hydraulic accumulator includes determining a first accumulator pressure at a first time with a pressure sensor, the first time during accumulator charging; determining a second accumulator pressure at a second time with the pressure sensor (296), the second time during accumulator charging; determining a first fan speed at the first time; determining a second fan speed at the second time; and estimating the fluid charge of the hydraulic accumulator as a function of the first accumulator pressure, the second accumulator pressure, the first fan speed, and the second fan speed.
摘要翻译：用于估计液压蓄能器的流体充量的方法包括：在蓄能器充电期间第一次使用压力传感器确定第一时间的第一蓄能器压力; 在第二时间用压力传感器（296）确定第二蓄能器压力，在蓄电池充电期间第二次; 首次确定第一个风扇速度; 在第二时间确定第二风扇速度; 以及作为所述第一蓄能器压力，所述第二蓄能器压力，所述第一风扇速度和所述第二风扇速度的函数，估计所述液压蓄能器的流体充量。

3. 发明申请

WO2012166881A2 ENGINE SYSTEM WITH REVERSIBLE FAN 审中-公开
标题翻译：具有可逆风扇的发动机系统
公开(公告)号：WO2012166881A2
公开(公告)日：2012-12-06
申请号：PCT/US2012/040155
申请日：2012-05-31
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , PETERSON, Randal, N. , PETERSON, Jeremy, T.
发明人： NELSON, Bryan, E. , PETERSON, Randal, N. , PETERSON, Jeremy, T.
IPC分类号： F01P5/02 , F01P7/04 , F01P3/18
CPC分类号： F01P5/043 , F01P11/06
摘要： An engine system (140) includes an engine (12), a primary pump (14) coupled to the engine (12), and a motor (18) fluidly connected to the primary pump (14). The engine system (140) further includes a heat exchanger (28) fluidly connected to the engine (12), the heat exchanger (28) configured to accept heated coolant from the engine (12) and deliver cooled coolant to the engine (20). The engine system (140) also includes a fan (20) driven by the motor (18) in either a forward or a reverse mode of operation, the fan (20) configured to pull air toward the heat exchanger (28) in a first direction during the forward mode of operation to assist in cooling the coolant, and to push air toward the heat exchanger (28) in a second direction opposite the first direction during the reverse mode of operation. The engine system (140) further includes a controller (68) configured to operate the fan (20) in the reverse mode of operation in response to a sensed temperature of the coolant and a speed of the fan (20) in the forward mode of operation.
摘要翻译：发动机系统（140）包括发动机（12），联接到发动机（12）的主泵（14）和与主泵（14）流体连接的马达（18）。发动机系统（140）还包括流体连接到发动机（12）的热交换器（28），所述热交换器（28）构造成接收来自发动机（12）的加热的冷却剂并将冷却的冷却剂输送到发动机（20）。发动机系统（140）还包括以正向或反向操作模式由电动机（18）驱动的风扇（20），所述风扇（20）构造成以第一方式将空气朝向热交换器（28）在向前的操作模式下方向，以帮助冷却冷却剂，并且在反向操作模式期间沿与第一方向相反的第二方向将空气推向热交换器（28）。发动机系统（140）还包括控制器（68），其被配置为响应于感测到的冷却剂的温度和风扇（20）的向前模式的速度而以相反的操作模式操作风扇（20）操作。

4. 发明申请

WO2012073110A2 HYDRAULIC FAN CIRCUIT HAVING ENERGY RECOVERY 审中-公开
标题翻译：具有能量回收的液压风扇电路
公开(公告)号：WO2012073110A2
公开(公告)日：2012-06-07
申请号：PCT/IB2011/002966
申请日：2011-11-22
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , PETERSON, Jeremy, T. , KUEHN, Jeffrey, L.
发明人： NELSON, Bryan, E. , PETERSON, Jeremy, T. , KUEHN, Jeffrey, L.
IPC分类号： F15B13/02 , E02F9/22 , F15B1/04
CPC分类号： E02F9/226 , F01P7/044 , F15B21/14 , F15B2211/20523 , F15B2211/20561 , F15B2211/20569 , F15B2211/27 , F15B2211/305 , F15B2211/31529 , F15B2211/625 , F15B2211/633 , F15B2211/6336 , F15B2211/665 , F15B2211/6652 , F15B2211/7058 , F15B2211/88
摘要： A hydraulic fan circuit (10) is disclosed. The hydraulic fan circuit may have a primary pump (14), a high-pressure passage (26) fluidly connected to the primary pump, and a low-pressure passage (24) fluidly connected to the primary pump. The hydraulic fan circuit may also have at least one accumulator (68, 70) in selective fluid communication with at least one of the high- and low- pressure passages, a motor (18), and a fan (20) connected to the motor. The hydraulic fan circuit may further have a fan isolation valve (84) fluidly connected to the high- and low-pressure passages. The fan isolation valve may be movable between a flow-passing position at which the motor is fluidly connected to the primary pump via the high- and low-pressure passages, and a flow-blocking position at which the motor is substantially isolated from the primary pump.
摘要翻译：公开了一种液压风扇回路（10）。液压风扇回路可具有主泵（14），流体连接至主泵的高压通道（26）以及流体连接至主泵的低压通道（24）。液压风扇回路还可以具有与高压通道和低压通道中的至少一个选择性流体连通的至少一个蓄压器（68,70），马达（18）和连接到马达（18）的风扇。液压风扇回路可以进一步具有流体地连接到高压通道和低压通道的风扇隔离阀（84）。风扇隔离阀可以在电动机通过高压通道和低压通道流体连接到主泵的通流位置和电动机基本上与初级泵隔离的流动阻断位置之间移动泵。

5. 发明申请

WO2013048712A1 REGENERATION CONFIGURATION FOR CLOSED-LOOP HYDRAULIC SYSTEMS 审中-公开
标题翻译：闭环液压系统的再生配置
公开(公告)号：WO2013048712A1
公开(公告)日：2013-04-04
申请号：PCT/US2012/054547
申请日：2012-09-11
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , KNUSSMAN, Michael, L. , EDLER, Brad, A.
发明人： NELSON, Bryan, E. , KNUSSMAN, Michael, L. , EDLER, Brad, A.
IPC分类号： F15B13/044 , E02F9/22 , F15B21/08 , F15B13/02
CPC分类号： F15B11/024
摘要： A hydraulic system (56) is disclosed. The hydraulic system may have a pump (80), and a hydraulic actuator (26) having a first chamber (52) and a second chamber (54). The hydraulic system may also have a first pump passage (82) fluidly communicating the pump with the first chamber, a second pump passage (84) connected to the pump, and a regeneration valve (110). The regeneration valve may be movable from a first position at which the second pump passage is connected to the second chamber and the second chamber is isolated from the first chamber, to a second position at which the second pump passage is blocked and the second chamber is connected to the first chamber.
摘要翻译：公开了一种液压系统（56）。液压系统可以具有泵（80）和具有第一室（52）和第二室（54）的液压致动器（26）。液压系统还可以具有将泵与第一室流体连通的第一泵通道（82），连接到泵的第二泵通道（84）和再生阀（110）。再生阀可以从第二泵通道连接到第二室的第一位置和第二室与第一室隔离，到第二位置，第二泵通道被阻塞，第二室是连接到第一个室。

6. 发明申请

WO2012162487A3 PUMP HAVING PORT PLATE PRESSURE CONTROL 审中-公开
公开(公告)号：WO2012162487A3
公开(公告)日：2012-11-29
申请号：PCT/US2012/039322
申请日：2012-05-24
申请人： CATERPILLAR INC. , THE CURATORS OF THE UNIVERSITY OF MISSOURI , MEHTA, Viral, S. , DU, Hongliu , NELSON, Bryan, E. , MANRING, Noah
发明人： MEHTA, Viral, S. , DU, Hongliu , NELSON, Bryan, E. , MANRING, Noah
IPC分类号： F04B1/29 , F04B1/20
摘要： A pump (28) is disclosed. The pump may have a housing (42), a body (46) rotatably disposed within the housing and at least partially defining a plurality of barrels (48), a plurality of plungers (50) associated with the plurality of barrels, and a swashplate (56) 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 (53) with an inlet port (72), a discharge port (74), and a protrusion (94). The port plate may be configured to engage an end of the rotatable body. The pump may further have at least one piston (90, 92)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.

7. 发明申请

WO2012162235A2 PUMP SYSTEM HAVING OPEN-LOOP TORQUE CONTROL 审中-公开
标题翻译：具有开环扭矩控制的泵系统
公开(公告)号：WO2012162235A2
公开(公告)日：2012-11-29
申请号：PCT/US2012/038826
申请日：2012-05-21
申请人： CATERPILLAR INC. , NELSON, Bryan, E. , TOGNETTI, Lawrence, J. , KUEHN, Jeffrey, L.
发明人： NELSON, Bryan, E. , TOGNETTI, Lawrence, J. , KUEHN, Jeffrey, L.
IPC分类号： F15B21/08 , E02F9/22 , F15B13/044 , F15B15/24
CPC分类号： E02F9/2232 , E02F9/2296 , F15B21/08 , F15B2211/20553 , F15B2211/63
摘要： A pump system (24) is disclosed. The pump system may have a pump (28) with a displacement that is variable, and an actuator (34) movable to adjust the displacement of the pump. The pump system may also have an electro- hydraulic valve (36) fluidly connected to the actuator and configured to control movement of the actuator, and a variable resistor (67) mechanically connected to at least one of the actuator and the pump. The variable resistor may be adjustable by movement of the at least one of the actuator and the pump to vary a current passing through the electro-hydraulic valve.
摘要翻译：公开了一种泵系统（24）。泵系统可以具有可变位移的泵（28）和可移动以调节泵的位移的致动器（34）。泵系统还可以具有流体地连接到致动器并被配置为控制致动器的运动的电动液压阀（36）以及机械地连接到致动器和泵的至少一个的可变电阻器（67）。可变电阻器可以通过致动器和泵中的至少一个的运动来调节，以改变通过电动液压阀的电流。

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