公开(公告)号：US20240344533A1

公开(公告)日：2024-10-17

申请号：US18756912

申请日：2024-06-27

申请人： Oshkosh Corporation

发明人： Derek Wente ,  Logan Gary ,  Jerrod Kappers

IPC分类号： F15B11/16 ,  B65F3/04

CPC分类号： F15B11/161 ,  B65F3/04 ,  F15B2211/205 ,  F15B2211/20553 ,  F15B2211/6652

摘要： A refuse vehicle includes a chassis and a vehicle body. A variable displacement pump is positioned within the vehicle body and is configured to pump hydraulic fluid from a hydraulic fluid reservoir into a high pressure line of a hydraulic circuit. A lifting system on the vehicle includes at least one actuator in fluid communication with the variable displacement pump, which delivers pressurized hydraulic fluid from the hydraulic fluid reservoir to the actuator through the high pressure line to adjust a position of the actuator. A valve is positioned downstream of the variable displacement pump. In a first valve position, the valve restricts flow outward from the high pressure line. In a second valve position, the valve directs fluid from the high pressure line into a lower pressure line to reduce a hydraulic pressure within the high pressure line and adjust an output parameter of the variable displacement pump.

公开(公告)号：US12055955B2

公开(公告)日：2024-08-06

申请号：US17984696

申请日：2022-11-10

申请人： Taiyuan University of Technology

发明人： Long Quan ,  Bin Zhao ,  Jing Yang ,  Lei Ge ,  He Liu ,  Yunxiao Hao

IPC分类号： G05D16/16 ,  F15B11/16 ,  G05D16/00

CPC分类号： G05D16/16 ,  G05D16/028

摘要： Disclosed is a flow control system for digital and mechanical redundant pressure compensation. On the basis of an original pressure compensation valve, two-position three-way electromagnetic valves are added to control the opening and closing of pressure compensation valves. Furthermore, pressure sensors and a controller are added, so that the system has a digital pressure compensation function. When the pressure sensor breaks down, the flow control system is switched to a mechanical compensation mode to achieve mechanical pressure compensation, the problem that system flow cannot be controlled when the sensor breaks down is solved, and the purpose of redundancy control is achieved. Moreover, the pressure compensation valve in the loop where the highest load is located can be controlled to be completely opened through the two-position three-way electromagnetic valve to reduce pressure loss of the valve port, and the pressure is not affected by load fluctuation.

公开(公告)号：US12055166B2

公开(公告)日：2024-08-06

申请号：US17574050

申请日：2022-01-12

申请人： DANFOSS A/S

发明人： Aaron Hertzel Jagoda ,  Eric Joseph Mann

IPC分类号： F16H3/44 ,  E02F9/22 ,  F15B11/16 ,  F15B21/08 ,  F16H3/72 ,  H02K7/108 ,  H02K7/116 ,  H02K11/00 ,  F16H47/04

CPC分类号： F15B21/087 ,  E02F9/2271 ,  E02F9/2289 ,  F15B11/165 ,  F16H3/44 ,  F16H3/724 ,  H02K7/108 ,  H02K7/116 ,  H02K11/0094 ,  F16H47/04 ,  F16H2200/2005

摘要： A variator includes an epicyclic gear set that has at least three nodes. The variator includes a pumping unit connected to a first node of the epicyclic gear set. The variator includes a clutch connected to a second node of the epicyclic gear set. The clutch is selectively movable between three positions. When in the first position, the clutch allows the second node to freewheel. When in the second position, the clutch connects the second node to a fixed surface. When in the third position, the clutch connects the second node to an electric motor. The variator includes a receiver connected to the third node of the epicyclical gear set. The receiver is configured to receive a drive shaft.

公开(公告)号：US20240068494A1

公开(公告)日：2024-02-29

申请号：US18259710

申请日：2021-12-30

申请人： ARTEMIS INTELLIGENT POWER LIMITED

发明人： Alexis DOLE ,  Matthew GREEN ,  John HUTCHESON ,  Daniel ABRAHAMS ,  Niall CALDWELL

IPC分类号： B66F9/22 ,  F15B11/16 ,  F15B11/17 ,  F15B21/08 ,  F15B21/14

CPC分类号： B66F9/22 ,  F15B11/165 ,  F15B11/17 ,  F15B21/082 ,  F15B21/14 ,  F15B2211/2656 ,  F15B2211/41518

摘要： The present invention provides a controller for hydraulic apparatus (100). The controller is configured to determine (310) that an energy return criteria has been met by movement of a first movement component of a first hydraulic actuator. In response thereto, the controller is further configured to select (320) at least one among a plurality of energy control strategies based on at least one operational characteristic of the hydraulic apparatus, and to control (330) the hydraulic apparatus to implement the energy control strategy during movement of the first movable component in such a way as to meet the energy return criteria. The plurality of energy control strategies comprises a first energy control strategy and a second energy control strategy. The at least one operational characteristic of the hydraulic apparatus comprises an indication of an expected energy recovery of one or more of the energy control strategies. The first energy control strategy comprises transferring energy from the first hydraulic actuator, via a hydraulic machine, to an energy consumer in torque connection with the hydraulic machine. The second energy control strategy comprises transferring energy from the first hydraulic actuator to a low-pressure reservoir of hydraulic fluid in the hydraulic circuit.

公开(公告)号：US20240068204A1

公开(公告)日：2024-02-29

申请号：US18239478

申请日：2023-08-29

申请人： Caterpillar Inc.

发明人： Pengfei MA

IPC分类号： E02F9/22 ,  F15B11/16

CPC分类号： E02F9/2235 ,  F15B11/165 ,  F15B2211/633

摘要： The present invention pertains to method for monitoring operation of a hydraulic system, in particular of a hydraulic system of a working machine, having at least one hydraulic actuator. The method comprises a step of determining a predefined operating condition of the hydraulic system; a step of determining an input power parameter being indicative of a power provided by an engine to the hydraulic system during the predetermined operating condition; a step of determining an output power parameter being indicative of a power provided by the hydraulic actuator during the predetermined operating condition; and a step of determining a fault condition of the hydraulic system based on the input power parameter and the output power parameter.

公开(公告)号：US11846090B2

公开(公告)日：2023-12-19

申请号：US18099454

申请日：2023-01-20

申请人： KUBOTA CORPORATION

发明人： Yuji Fukuda

IPC分类号： E02F9/22 ,  F15B11/16 ,  E02F3/42

CPC分类号： E02F9/2285 ,  E02F3/425 ,  E02F9/2225 ,  E02F9/2296 ,  F15B11/163 ,  F15B11/165 ,  F15B11/166 ,  F15B2211/30555 ,  F15B2211/3111 ,  F15B2211/329 ,  F15B2211/351 ,  F15B2211/40569 ,  F15B2211/45

摘要： A hydraulic system for a working machine includes hydraulic actuators actuated with hydraulic fluid delivered from a hydraulic pump, control valves each of which is shiftable among shift positions to control a flowrate of hydraulic fluid flowing to the corresponding hydraulic actuator, a detection fluid passage, an interlocking control valve, and a pressure detection unit. Each control valve includes an input port, an output port, and a flowrate reduction section. One of the control valves includes a flowrate increase section. The interlocking control valve is configured to be shifted in accordance with a shift of the one of the control valves among the shift positions and to be shifted to a blocking position to block a pilot fluid introduced into the interlocking control valve from the detection fluid passage when the one of the control valves is shifted to the increase position.

公开(公告)号：US20230294759A1

公开(公告)日：2023-09-21

申请号：US18323341

申请日：2023-05-24

申请人： Shanghai Sany Heavy Machinery Co., Ltd.

发明人： Ning ZHANG

IPC分类号： B62D5/065 ,  B62D5/12 ,  F15B11/16

CPC分类号： B62D5/065 ,  B62D5/12 ,  F15B11/165 ,  F15B2211/20553

摘要： Disclosed are a hydraulic system, a control method and a working machine. The hydraulic system includes an oil tank, a working pump, a control cylinder controlling a displacement changing mechanism, a working oil line communicating with an output main path of the working pump, a load-sensing system including a load-sensing circuit outputting hydraulic pressure based on load, a load-sensing valve and a switching-control valve switchable between a first-valve-position and a second-valve-position. When differential pressure between the first and second control ports is greater than a first threshold, the output main path communicates with an input port of the control cylinder; when it is less than the first threshold, the input port communicates with an oil return port of the oil tank. Based on this, operators can switch the hydraulic system between the fixed-displacement mode and the fixed/variable-displacement mode, thereby achieving a better balance between energy conservation and performance.

公开(公告)号：US11719335B2

公开(公告)日：2023-08-08

申请号：US17432350

申请日：2020-04-02

申请人： KOMATSU LTD.

发明人： Akira Nakashima ,  Shinobu Kamikawa

IPC分类号： F16H61/4078 ,  F15B21/00 ,  F15B11/08 ,  F15B13/042 ,  F16H61/4139 ,  F16H61/4008 ,  F15B21/0423 ,  E02F9/22 ,  F15B11/16

CPC分类号： F16H61/4078 ,  E02F9/22 ,  F15B11/08 ,  F15B11/167 ,  F15B13/042 ,  F15B21/005 ,  F15B21/0423 ,  F16H61/4008 ,  F16H61/4139 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/36 ,  F15B2211/613 ,  F15B2211/615 ,  F15B2211/62 ,  F15B2211/633 ,  F15B2211/6303 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/67 ,  F15B2211/7058

摘要： An HST circuit has a hydraulic pump that converts a drive force of an engine into energy of oil, and a hydraulic motor that converts the energy of the oil converted by the hydraulic pump into drive energy. Pressure sensors detect a pressure of the oil within the HST circuit. A variable charge pump replenishes the oil into the HST circuit. A controller controls a capacity of the variable charge pump based on the pressure of the oil within the HST circuit detected by the pressure sensors.

公开(公告)号：US11713776B2

公开(公告)日：2023-08-01

申请号：US17184434

申请日：2021-02-24

申请人： Boston Dynamics, Inc.

发明人： Michael Murphy ,  John Aaron Saunders ,  Steven Potter

IPC分类号： F15B11/18 ,  G05D1/02 ,  B25J9/20 ,  F15B11/16 ,  F15B11/17 ,  G05D16/20 ,  B25J9/16 ,  G05D1/00 ,  B25J9/14

CPC分类号： F15B11/18 ,  B25J9/14 ,  B25J9/1633 ,  B25J9/1638 ,  B25J9/1697 ,  B25J9/20 ,  F15B11/161 ,  F15B11/162 ,  F15B11/17 ,  G05D1/0038 ,  G05D1/021 ,  G05D1/0246 ,  G05D16/2013 ,  G05D16/2022 ,  B60Y2400/406 ,  F15B2211/20592 ,  F15B2211/212 ,  F15B2211/30585 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/41545 ,  F15B2211/455 ,  F15B2211/50 ,  F15B2211/605 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6653 ,  F15B2211/6654 ,  F15B2211/7051 ,  F15B2211/71 ,  F15B2211/7107 ,  F15B2211/76 ,  F15B2211/765 ,  F15B2211/78

摘要： An actuation pressure to actuate one or more hydraulic actuators may be determined based on a load on the one or more hydraulic actuators of a robotic device. Based on the determined actuation pressure, a pressure rail from among a set of pressure rails at respective pressures may be selected. One or more valves may connect the selected pressure rail to a metering valve. The hydraulic drive system may operate in a discrete mode in which the metering valve opens such that hydraulic fluid flows from the selected pressure rail through the metering valve to the one or more hydraulic actuators at approximately the supply pressure. Responsive to a control state of the robotic device, the hydraulic drive system may operate in a continuous mode in which the metering valve throttles the hydraulic fluid such that the supply pressure is reduced to the determined actuation pressure.

公开(公告)号：US11692332B2

公开(公告)日：2023-07-04

申请号：US17632075

申请日：2020-08-05

申请人： Caterpillar SARL

发明人： Hideki Nakajima ,  Koichi Kiyasu

IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B11/17

CPC分类号： E02F9/2242 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/165 ,  F15B11/17 ,  E02F9/2235 ,  E02F9/2267 ,  F15B2211/3144 ,  F15B2211/351 ,  F15B2211/455

摘要： To improve operability and work efficiency while achieving reduction of the number of parts and simplification of circuit structure, in a hydraulic control system equipped with hydraulic actuators whose hydraulic power sources are both the first, second hydraulic pumps. The hydraulic control system is provided with the stick directional switching valve; the main-side, sub-side supply oil passages connecting the hydraulic pumps to the stick directional switching valve; and the stick flow rate control valve which is placed in the sub-side supply oil passage, and controls the supply flow rate from the hydraulic pump when the supply flow rate to the stick cylinder requires the supply flow rates from both the hydraulic pumps, wherein the stick directional switching valve is configured such that the discharge flow rate control is performed in the entire area of the spool stroke, and the supply flow rate control is performed at the first region of the former half of the spool stroke, but not performed at the second region of the latter half of the spool stroke.