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    Active hydraulic ripple cancellation methods and systems
    21.
    发明授权
    Active hydraulic ripple cancellation methods and systems 有权

    公开(公告)号：US10954935B2

    公开(公告)日：2021-03-23

    申请号：US16094391

    申请日：2017-04-18

    Applicant: ClearMotion, Inc.

    Inventor： Colin Patrick O'Shea ,  Clive Tucker ,  Brian Alexander Selden

    IPC: F04B49/06 ,  F04B49/20 ,  F04B49/10 ,  F04C18/08 ,  F04C28/08

    Abstract: 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.

    ACTIVE SAFETY SUSPENSION SYSTEM
    23.
    发明申请
    ACTIVE SAFETY SUSPENSION SYSTEM 审中-公开

    公开(公告)号：US20190381998A1

    公开(公告)日：2019-12-19

    申请号：US16453857

    申请日：2019-06-26

    Applicant: ClearMotion, Inc.

    Inventor： Zackary Martin Anderson ,  Marco Giovanardi ,  Clive Tucker ,  Jack A. Ekchian

    IPC: B60W30/02 ,  B60G17/0195 ,  B60G17/02 ,  B60W10/20 ,  B60W10/22 ,  B60W50/14

    Abstract: In some embodiments, a rapid-response active suspension system controls suspension force and position for improving vehicle safety and drivability. The system may interface with various sensors that detect safety critical vehicle states and adjust the suspension of each wheel to improve safety. Pre-crash and collision sensors may notify the active suspension controller of a collision and the stance may be adjusted to improve occupant safety during an impact while maintaining active control of the wheels. Wheel forces may also be controlled to improve the effectiveness of vehicle safety systems such as ABS and ESP in order to improve traction. Also, bi-directional information may be communicated between the active suspension system and other vehicle safety systems such that each system may respond to information provided to the other.

    INTEGRATED ENERGY GENERATING DAMPER
    24.
    发明申请
    INTEGRATED ENERGY GENERATING DAMPER 审中-公开

    公开(公告)号：US20190338760A1

    公开(公告)日：2019-11-07

    申请号：US16458845

    申请日：2019-07-01

    Applicant: ClearMotion, Inc.

    Inventor： Clive Tucker ,  Ross J. Wendell ,  Zackary Martin Anderson ,  Evan Moen ,  Johannes Schneider ,  Zachary J. Jackowski ,  Sean C. Morton

    IPC: F03G7/08 ,  F03C1/26 ,  F01C13/00 ,  B60G11/26 ,  F01C1/10 ,  F01C9/00

    Abstract: A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.

    PILOT OPERATED BLOW-OFF VALVES FOR HYDRAULIC ACTUATORS
    27.
    发明申请
    PILOT OPERATED BLOW-OFF VALVES FOR HYDRAULIC ACTUATORS 有权

    公开(公告)号：US20250012299A1

    公开(公告)日：2025-01-09

    申请号：US18889623

    申请日：2024-09-19

    Applicant: ClearMotion, Inc

    Inventor： Clive Tucker ,  Joseph Thomas Belter

    IPC: F15B13/02 ,  B60G17/044 ,  F15B7/00

    Abstract: Disclosed herein are various embodiments of a hydraulic actuator that includes one or more check valves having a dynamically varying cracking pressure. In certain embodiments, a hydraulic actuator may be configured to vary the cracking pressure of a check valve based on an operating condition of a pump of the hydraulic actuator. The check valve may be located along a bypass path in the hydraulic actuator, thereby allowing for fluid flow to bypass a pump of the hydraulic actuator by passing through the check valve. The use of such hydraulic actuators is contemplated in, for example, an active suspension system of a vehicle. Additionally, various embodiments of suitable check valves are disclosed. Additionally, methods are disclosed for operation of the check valve and the hydraulic actuator.

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