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公开(公告)号：US20240326903A1
公开(公告)日：2024-10-03
申请号：US18609317
申请日：2024-03-19
发明人： Abdul Karim Rahimzai
摘要： A hydraulic steering arrangement (1) including a supply port arrangement having a supply port (2) and a return port (3), a working port arrangement having two working ports (4, 5), a supply flow path (7) between the supply port (2) and one of the working ports (4, 5), a return flow path (9) between the other of the working ports (5, 4) and the return port (3) and a valve arrangement having a spool/sleeve set, wherein the supply flow path (7) includes a supply orifice (A4) and the return flow path (9) comprises a return orifice (A5). Such a hydraulic steering arrangement should give a comfortable feeling when used in connection with an articulated vehicle. To this end a variable damping orifice (Adp) is arranged downstream the supply orifice (A4) and upstream the return orifice (A5).
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公开(公告)号：US20240308577A1
公开(公告)日：2024-09-19
申请号：US18277602
申请日：2022-01-24
发明人： Bernhard MILLER
摘要： A control unit is provided for a vehicle with a steering device having a pump device, which includes a pump and an electric motor, and a transmission device. The control unit is designed to provide the electric motor with a motor signal for operating the electric motor in order to cool the electric motor in a normal operating phase of the steering device.
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3.发明公开公开(公告)号：US20240124054A1
公开(公告)日：2024-04-18
申请号：US18277605
申请日：2022-01-26
发明人： Bernhard MILLER
摘要： A valve device for a steering device of a vehicle includes a pump device with a pump for pumping a working medium to a first discharge connection or a second discharge connection of the pump device and a motor for driving the pump. The valve device further has a valve and/or a storage container, wherein the valve and/or the storage container are switched between the first discharge connection of the pump device and the second discharge connection of the pump device.
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公开(公告)号：US20240034396A1
公开(公告)日：2024-02-01
申请号：US18356830
申请日：2023-07-21
发明人： Abdul Karim Rahimzai
摘要： A hydraulic steering arrangement (1) is disclosed. The hydraulic steering arrangement (1) includes a supply port arrangement (P, T) having a pressure port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path (2) having a main orifice (A1) and at least one further orifice (A2, A3, A4) downstream the main orifice (A1), the main flow path (2) being arranged between the pressure port (P) and the working port arrangement (L, R), a return flow path (4) arranged between the working port arrangement (L, R) and the tank port (T), a measuring motor (3), an amplification flow path (6) having an amplification orifice (AU) and being arranged between the pressure port (P) and the working port arrangement (L, R), and an adjustable pressure source (9) connected to the pressure port (P) and having a load sensing port (18), wherein a main drain orifice (Adrain) is connected between the main flow path (2) down-stream the main orifice (A1) and the return flow path (4). Such a steering arrangement should have the possibility of dynamic steering with a simple construction. To this end a dynamic main orifice (A1-dyn) is connected between the load sensing port (18) and the main flow path (2) downstream the main orifice (A1), and a dynamic drain orifice (Adrain-dyn) is connected between the load sensing port (18) and the return flow path (4), which dynamic drain orifice (Adrain-dyn) is open when the dynamic main orifice (A1-dyn) is closed.
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公开(公告)号：US11716921B2
公开(公告)日：2023-08-08
申请号：US17011029
申请日：2020-09-03
申请人： DEERE & COMPANY
发明人： Austin J. Karst , Jason J. Wanner
CPC分类号： A01B69/007 , B62D5/065 , B62D5/091
摘要： A steering system for controlling an agricultural machine having a pair of front wheels and a pair of rear wheels includes a controller, an operator steer input for communicating a steer command, a steer input sensor for detecting and outputting the steer command to the controller, a primary differential steering system for operably controlling the pair of front wheels, and a secondary steering system for operably controlling the pair of rear wheels. The secondary steering system includes a first actuator for controlling a first rear wheel and a second actuator for controlling a second rear wheel. The primary differential steering system is controlled based on the steer command. The controller outputs a control signal to operably actuate the first and second actuators at a non-linear steering gain rate as a function of the steer command.
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公开(公告)号：US11691666B2
公开(公告)日：2023-07-04
申请号：US16323594
申请日：2017-03-15
发明人： Tatsuo Matsumura
CPC分类号： B62D5/0481 , B62D5/0463 , B62D5/06 , B62D5/065 , B62D5/0835 , B62D5/12 , B62D6/02
摘要： Power steering device has steering mechanism 2, power cylinder 29 having a pair of hydraulic chambers 29a, 29b divided by piston 31 and providing steering force to steering mechanism, torque sensor 11 detecting steering torque Tr of steering mechanism, rotary valve 30 selectively supplying working fluid supplied from pump 9 to the pair of hydraulic chambers according to relative rotation between input and output shafts, hollow shaft motor 10 providing steering force to input shaft, control unit 13 in which microcomputer is mounted, and torque command signal operating section 61 provided in control unit and configured to calculate torque command signal Tm* for driving and controlling electric motor 10 on the basis of the steering torque Tr and vehicle speed Vs and when vehicle speed is a predetermined vehicle speed or greater, set torque command signal to 0. With this, physical size of power steering device can be decreased.
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公开(公告)号：US11667325B2
公开(公告)日：2023-06-06
申请号：US16760427
申请日：2018-10-30
申请人： DANA ITALIA S.R.L.
发明人： Davide Moser , Stefano Fasano , Maurizio Bartoli
摘要： A hydraulic circuit, in particular to a hydraulic steering circuit for steering at least one vehicle axle, the hydraulic circuit including a first fluid path having a first end and a second end and providing fluid communication or selective fluid communication between the first end and the second end of the first fluid path; and a second fluid path providing fluid communication or selective fluid communication between the first end of the first fluid path and the second end (2) of the first fluid path, in parallel to the first fluid path or to a section thereof. In some aspects, the first fluid path includes a first hydraulic displacement unit; and the second fluid path includes at least a first proportional bypass control valve for controlling a bypass fluid flow in the second fluid path. The hydraulic steering circuit may be part of a driveline for a vehicle.
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公开(公告)号：US11643137B2
公开(公告)日：2023-05-09
申请号：US17487399
申请日：2021-09-28
发明人： Joakim Heldmann , Gustav Neander
摘要： The present disclosure relates to a method for controlling a steering assist system of a vehicle. Based on a signal indicative of a road characteristics of a road segment, a flow of fluid supplied by a fluid pump is controlled to generate a steering assist force to a wheel of the vehicle.
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公开(公告)号：US20230077263A1
公开(公告)日：2023-03-09
申请号：US17723011
申请日：2022-04-18
发明人： Kevin J. Zent , Daniel J. Krieger
摘要： Disclosed embodiments include steering circuits utilizing a controllable cross-feed loop between left and right drive motor sides of an articulated power machine to reduce skidding caused by a turning operation in which an articulation actuator changes an articulation joint angle between a front frame member and a rear frame member of the power machine.
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公开(公告)号：US11584430B2
公开(公告)日：2023-02-21
申请号：US16595832
申请日：2019-10-08
发明人： Niels Bjarne Hansen , Søren Pedersen , Tom Rudolph , Jens Vester , Morten Hoeck Petersen , Thomas Traeger Hansen
摘要： A hydraulic steering arrangement (1) comprising a supply port arrangement having a pressure port and a tank port, a working port arrangement having two working ports (L, R), a mechanical steering unit (3) connected to a steering wheel (2) and being arranged between the supply port arrangement and the working port arrangement (L, R), supply valve means (12) having a connection to the pressure port and to the working port arrangement (L, R) and being controlled by a controller (10), and a steering wheel sensor (9) connected to the controller (10) is described. Such a steering arrangement could allow a comfortable feeling for the driver. To this end the steering wheel sensor (9) is mounted in a position of minimum play to steering wheel (2) and steering wheel sensor (9) and detects a beginning of a movement of the steering wheel (2), wherein the controller (10) actuates the supply valve means (12) upon beginning of the movement, and the supply valve means (12) supply hydraulic fluid to the working port arrangement (L, R).
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