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Active vehicle suspension

  • US 9,174,508 B2
  • Filed: 03/14/2014
  • Issued: 11/03/2015
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A method of on-demand energy delivery to an active suspension system, comprising:

  • using an active suspension system in a vehicle, wherein the active suspension system is disposed between a wheel mount and a vehicle body, the active suspension system comprising an actuator, an electric motor, a hydraulic pump operatively coupled to the electric motor, a sensor, an energy storage facility, wherein the actuator comprises a piston, a compression volume, and an extension volume;

    detecting a first wheel event with the sensor;

    determining a first torque, at least partially based on a measurement by the sensor, to be applied to a shaft of the hydraulic pump in response to the first wheel event;

    sourcing electrical energy from the energy storage facility;

    delivering at least a portion of the sourced electrical energy to the electric motor to produce the first torque; and

    altering a pressure in a volume in the actuator by applying the first torque to the hydraulic pump shaft.

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