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公开(公告)号：US20240010039A1
公开(公告)日：2024-01-11
申请号：US18023446
申请日：2021-08-31
申请人： ClearMotion, Inc.
发明人： Brian Alexander Selden , Eric Phares Reeder , Clive Tucker , Mathijs van Staalduinen , Cameron D. Peterson , Thomas McVay , Andrew Kegan Proeschel
CPC分类号： B60G13/08 , F15B1/021 , B60G2202/416 , B60G2202/154
摘要： Hydraulic systems and methods for reducing the propagation of flow and/or pressure fluctuations within a hydraulic system with a differential buffer are described. A differential buffer may include a first internal volume, a second internal volume, and a barrier separating at least a portion of the first internal volume and at least a portion of the second internal volume. The barrier may move to mitigate pressure and/or flow fluctuations in the first internal volume and the second internal volume by passive destructive interference.
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公开(公告)号：US11440366B1
公开(公告)日：2022-09-13
申请号：US16590996
申请日：2019-10-02
申请人： ClearMotion, Inc.
IPC分类号： B60G17/016 , B60G13/08 , B60G17/08
摘要： Active suspension systems including actuators with combinations of accumulators and flow restrictions, as well as their methods of operation, are described. In some embodiments, methods and constructions for mitigating pump ripple and/or resonances between different hydraulic components are also described.
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公开(公告)号：US20210231133A1
公开(公告)日：2021-07-29
申请号：US17089137
申请日：2020-11-04
申请人： ClearMotion, Inc.
摘要： Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US10954935B2
公开(公告)日：2021-03-23
申请号：US16094391
申请日：2017-04-18
申请人： ClearMotion, Inc.
摘要： Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.
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公开(公告)号：US20190162179A1
公开(公告)日：2019-05-30
申请号：US16094391
申请日：2017-04-18
申请人： ClearMotion, Inc.
摘要： Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.
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公开(公告)号：US11965531B2
公开(公告)日：2024-04-23
申请号：US17537736
申请日：2021-11-30
申请人： ClearMotion, Inc.
CPC分类号： F15B11/08 , B60G17/0416
摘要： Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US20220220984A1
公开(公告)日：2022-07-14
申请号：US17537736
申请日：2021-11-30
申请人： ClearMotion, Inc.
摘要： Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US20220185056A1
公开(公告)日：2022-06-16
申请号：US17437612
申请日：2020-03-11
申请人： ClearMotion, Inc.
发明人： Joseph Thomas Belter , Brian Alexander Selden , Jason Steven Sirois , Mathijs van Staalduinen , Clive Tucker , Taha Zeki Ramazanoglu
摘要： Active suspension actuator systems including an actuator with a compression volume and an extension volume are described. In some embodiments, the system includes one or more flow control devices in fluid communication with the compression volume and/or the extension volume of the actuator. In some instances, a flow control device may include a pressure balanced blow-off valve (PBOV). In some embodiments, the system includes a high capacity bidirectional base valve. In some embodiments, two or more flow control devices cooperate to, for example, damp low amplitude oscillations in the extension and/or compression volumes, and to allow the build-up of pump generated differential pressures while discharging rapid road induced differential pressure spikes between the extension and compression volumes.
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公开(公告)号：US11215202B2
公开(公告)日：2022-01-04
申请号：US17089137
申请日：2020-11-04
申请人： ClearMotion, Inc.
摘要： Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US20220373003A1
公开(公告)日：2022-11-24
申请号：US17775567
申请日：2020-11-13
申请人： ClearMotion, Inc.
IPC分类号： F15B21/00
摘要： Hydraulic systems and methods for reducing the propagation of flow and/or pressure pulsations within a hydraulic system are described. In one embodiment, a hydraulic system may include a hydraulic device and a differential buffer fluidly connected to the hydraulic device. The differential buffer may include a piston that is exposed to pressure pulsations that propagate along separate flow paths and that are at least partially out of phase with one another. Corresponding displacement of the piston due to the out of phase pulsations may at least partially mitigate propagation of the pulsations within the hydraulic system downstream from the differential buffer.
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