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公开(公告)号：US20240425104A1
公开(公告)日：2024-12-26
申请号：US18822691
申请日：2024-09-03
Applicant: Parker-Hannifin Corporation
Inventor： Hao Zhang , Raymond Collett , Rajneesh Kumar , Qiang Wang , Miao Zhang , James Howland
Abstract: A hydraulic system for a work machine comprising a priority circuit including at least a first priority actuator and a priority control valve for controlling the supply of hydraulic fluid to the first priority actuator and for providing a load sense signal indicative of the load acting on the first priority actuator; an auxiliary circuit including at least a first auxiliary actuator and at least a first auxiliary control valve for controlling the supply of hydraulic fluid to the first auxiliary actuator; at least a first pump for producing a flow of hydraulic fluid; and a priority valve for distributing the flow from the pump to the priority circuit and auxiliary circuit for operating the respective actuators thereof, with priority being given to the priority circuit as a function of the load sense signal.
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公开(公告)号：US12162346B2
公开(公告)日：2024-12-10
申请号：US18533267
申请日：2023-12-08
Applicant: KUBOTA CORPORATION
Inventor： Tomoya Katsuura , Yuichiro Matoba , Shigeru Komatsu , Kazuya Okubo
IPC: B60K25/02 , B60K25/06 , B62D5/06 , B62D5/07 , B62D49/06 , F15B15/20 , F15B21/0423 , F16H47/02 , F16H63/30
Abstract: A working vehicle includes a first hydraulic pump (e.g., a variable displacement pump) with a delivery flow rate controlled by load sensing control, a second hydraulic pump (e.g., a fixed displacement pump), at least one working-machine-related control valve to control at least one working-machine-related hydraulic actuator, a power shift valve to control at least one traveling-power-transmission-related hydraulic actuator, and a power steering controller to control a steering-related hydraulic actuator. The at least one working-machine-related control valve is provided in a first hydraulic system supplied with hydraulic fluid by the first hydraulic pump, and at least one of the power shift valve or the power steering controller is provided in a second hydraulic system supplied with hydraulic fluid by the second hydraulic pump.
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公开(公告)号：US20240391522A1
公开(公告)日：2024-11-28
申请号：US18662217
申请日：2024-05-13
Applicant: Danfoss Power Solutions ApS
Inventor： Thomas Bauer , Niels Bjarne Hansen
Abstract: A hydraulic arrangement including a supply port (5), a working port arrangement (20), a valve arrangement (3, 8, 21) controlling a supply of hydraulic fluid from the supply port (5) to the working port arrangement (20), a command device (20) controlling the valve arrangement (3, 8, 21), and a sensor arrangement (19) sensing at least a working condition of the hydraulic arrangement is described. In such a hydraulic arrangement a simple way should be given to achieve a safety functionality. To this end the valve arrangement (3, 8, 21) includes flow limiting means (9) operatively coupled to the sensor arrangement (19), wherein the flow limiting means (9) limit the flow to the working port arrangement (20) depending on the at least one working condition of the hydraulic arrangement.
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公开(公告)号：US20240359730A1
公开(公告)日：2024-10-31
申请号：US18611783
申请日：2024-03-21
Applicant: DEERE & COMPANY
Inventor： MANUEL BILLICH
CPC classification number: B62D5/075 , B60T13/686 , F15B13/0401 , B60T2260/02
Abstract: An apparatus for operating a load-controlled hydraulic supply of an agricultural tractor includes a hydraulic pump which is adjustable with respect to the displacement volume for supplying pressurized hydraulic fluid, a proportional valve which is electrically actuatable, a primary hydraulic consumer to carry out a superordinate hydraulic function and to be directly connected to a conveying outlet of the hydraulic pump, a secondary hydraulic consumer to carry out a subordinate hydraulic function and to be connected to the conveying outlet of the hydraulic pump via the proportional valve, and a control unit configured to move the proportional valve into a closed valve position when the control unit recognizes that at least one of a required power of the primary and secondary hydraulic consumers exceeds the conveying capacity of the hydraulic pump and the subordinate hydraulic function of the secondary hydraulic consumer is inactive.
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公开(公告)号：US20240308333A1
公开(公告)日：2024-09-19
申请号：US18533267
申请日：2023-12-08
Applicant: KUBOTA CORPORATION
Inventor： Tomoya KATSUURA , Yuichiro MATOBA , Shigeru KOMATSU , Kazuya OKUBO
IPC: B60K25/02 , B60K25/06 , B62D5/06 , B62D5/07 , B62D49/06 , F15B15/20 , F15B21/0423 , F16H47/02 , F16H63/30
CPC classification number: B60K25/02 , B60K25/06 , B62D5/063 , B62D5/07 , B62D49/06 , F15B15/20 , F15B21/0423 , F16H47/02 , F16H63/3023 , B60K2025/026 , F16H2047/025
Abstract: A working vehicle includes a first hydraulic pump (e.g., a variable displacement pump) with a delivery flow rate controlled by load sensing control, a second hydraulic pump (e.g., a fixed displacement pump), at least one working-machine-related control valve to control at least one working-machine-related hydraulic actuator, a power shift valve to control at least one traveling-power-transmission-related hydraulic actuator, and a power steering controller to control a steering-related hydraulic actuator. The at least one working-machine-related control valve is provided in a first hydraulic system supplied with hydraulic fluid by the first hydraulic pump, and at least one of the power shift valve or the power steering controller is provided in a second hydraulic system supplied with hydraulic fluid by the second hydraulic pump.
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Patent Agency Ranking
公开(公告)号：US20240166256A1
公开(公告)日：2024-05-23
申请号：US18284440
申请日：2022-03-15
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Kengo TAMURA , Akihito NIBE
CPC classification number: B62D5/093 , B62D5/0475 , B62D5/063 , B62D5/075
Abstract: A steering apparatus for an industrial vehicle includes: a manual steering circuit which includes a first valve opened/closed according to an operation of a steering wheel and supplies hydraulic oil discharged from a hydraulic pump to a steering cylinder through the first valve; an automatic steering circuit which includes a second valve opened/closed according to a calculation result of automatic operation control and supplies the hydraulic oil discharged from the hydraulic pump to the steering cylinder through the second valve; and a branching valve which is disposed between the hydraulic pump and the first and second valves and branches the hydraulic oil to the manual steering circuit and the automatic steering circuit. The branching valve is a priority valve which preferentially supplies the hydraulic oil to the manual steering circuit at a designed flow rate equal to or larger than a predetermined flow rate for operating the steering cylinder.
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7.发明公开公开(公告)号：US20230415686A1
公开(公告)日：2023-12-28
申请号：US18214862
申请日：2023-06-27
Applicant: Oshkosh Corporation
Inventor： Jesse Steinke , Ryan Wolf , Chris Mills
CPC classification number: B60R16/08 , B62D5/075 , B60T13/36 , B60L50/60 , F15B15/18 , F15B19/00 , F15B1/26
Abstract: A hydraulic system includes a pump having a pump outlet, a tank configured to supply fluid to the pump, a hydraulic motor coupled to an air compressor that is configured to supply compressed air to an air brake, a steering gear having an inlet workport and an outlet workport, and a compressor bypass valve. The compressor bypass valve is selectively movable between a first position where fluid flow is provided from the pump outlet to both the hydraulic motor and the inlet workport of the steering gear and a second position where the fluid flow from the pump outlet bypasses the hydraulic motor and is supplied to the inlet workport of the steering gear.
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公开(公告)号：US11639193B2
公开(公告)日：2023-05-02
申请号：US16943153
申请日：2020-07-30
Applicant: DEERE & COMPANY
Inventor： Scott R. Stahle , Kevin W. Campbell , Matthew J. Sbai , Joel D. Banninga
Abstract: Systems and methods for steering a vehicle that adjust how quickly a selected steering input is achieved based on a speed at which the vehicle is traveling are disclosed. The systems and methods include receiving a steering input, detecting a vehicle speed, and selecting a steering ramp rate that defines how quickly a steering amount corresponding to the steering input is achieved by one or more steerable components of the vehicle. In some implementations, the steering ramp rate may be affected as a result of whether the steering input is greater than or less than a previous steering input.
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公开(公告)号：US11614102B2
公开(公告)日：2023-03-28
申请号：US16614831
申请日：2018-05-30
Applicant: HYDAC SYSTEMS & SERVICES GMBH
Inventor： Matthias Mueter
Abstract: A pressure supply device for prioritised volume flow splitting, in particular in mobile working machines, includes at least one adjusting pump (2) controllable by an LS signal as main pump, a constant-displacement pump (4) as an auxiliary pump, and two pressure balances. A system is supplied primarily, in particular in the form of steering hydraulics (PL), which outputs an LS signal. A system is supplied secondarily, which outputs a further LS signal, in particular in the form of working hydraulics (PA). A further system is supplied hydraulically, in particular in the form of brake hydraulics (PB). One pressure balance (DW1) is used to supply the system (PL) to be supplied primarily and/or the further hydraulic system (PB), the other pressure balance (DW2) is used to supply the system (PL) to be supplied primarily and/or the system (PA) to be supplied secondarily, The respective pressure balance (DW1, DW2) can be activated by an LS signal in such a way that the constant-displacement pump (4) is also used to supply the system (PA) to be supplied secondarily.
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公开(公告)号：US11592072B2
公开(公告)日：2023-02-28
申请号：US16893695
申请日：2020-06-05
Applicant: The Boeing Company
Inventor： Justin Christenson
Abstract: A dynamic load damping apparatus is employed in a hydraulic steering system control circuit of an aircraft. The dynamic load damping apparatus is positioned in the hydraulic steering system control circuit in parallel with a control valve of the control circuit that functions as the hydraulic fluid source of the control circuit and an actuator that controls movements of a nose gear of the aircraft. The dynamic load damping apparatus dampens loads transmitted to the hydraulic actuator that controls the steering movements of the nose gear on the aircraft.
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