Clearmotion, Inc.

Levant Power Corporation

Colin Patrick O'Shea

Clive Tucker

Johannes Schneider

Marco Giovanardi

Tyson David Sawyer

Zackary Martin Anderson

Ross J Wendell

Richard Anthony Zuckerman

Jonathan Robert Leehey

Vladimir Gorelik

Patrick W Neil

Robert Driscoll

Shakeel Avadhany

John Giarratana

William G Near

Matthew D Cole

Jack A Ekchian

Brian Alexander Selden

Joseph Thomas Belter

Nathan Woodard

Hector Arnaldo Inirio

A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

Active vehicle suspension

Active suspension systems may include actuators with combinations of accumulators and flow restrictions. In some embodiments, methods and constructions may be implemented to mitigate pump ripple and/or resonances between different hydraulic components.

Frequency dependent pressure and/or flow fluctuation mitigation in hydraulic systems

A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

Active vehicle suspension system

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 hydraulic ripple cancellation methods and systems

Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved.

Apparatus and method for active vehicle suspension

Presented herein are systems and methods for attenuating certain pulsations in a hydraulic system comprising a pump and a hydraulic actuator. In certain aspects, an accumulator comprising an internal volume that is divided into a working chamber and a contained chamber may be utilized to at least partially attenuate propagation of certain pulsations in the system. The working chamber may be fluidically coupled to the pump via a first flow path and fluidically coupled to a chamber of the actuator via a second flow path. The system may be designed such that a first inertance of the first flow path is greater than a second inertance of the second flow path. Additionally or alternatively, the system may be designed such that a resonance associated with the first inertance and a compliance of the accumulator may occur at a resonance frequency of less than 90 Hz.

Systems and methods for managing noise in compact high speed and high force hydraulic actuators

Gerotor pump with bearing

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.

Growing community of inventors

Cambridge, MA, United States of America

Colin Patrick O'Shea