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Electrically controlled suspension system

  • US 7,526,665 B2
  • Filed: 02/03/2006
  • Issued: 04/28/2009
  • Est. Priority Date: 06/13/2005
  • Status: Active Grant
First Claim
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1. An electronically controlled suspension system having a variable damper to be controlled using a control command value, comprising:

  • a sensor unit for extracting and providing a vertical acceleration component of a vehicle body of a vehicle;

    a signal processing unit for calculating a vertical velocity of the vehicle body using the vertical acceleration component provided by the sensor unit;

    a control gain determining unit having a control gain set according to the amplitude of the vertical acceleration component, and detecting the amplitude of the vertical acceleration component provided by the sensor unit and extracting a control gain corresponding to the detected amplitude from a nonlinear control map in which the control gain is set according to the amplitude of the vertical acceleration component, wherein the nonlinear control map comprises a plurality of linear relationships between the amplitude of the vertical acceleration component and the control gain, each of the plurality of linear relationships having a slope greater than zero;

    a control command value calculating unit for calculating a control command value using the control gain provided by the control gain determining unit and the vertical velocity of the vehicle body provided by the signal processing unit; and

    a damper driving unit for driving the variable damper based on the control command value.

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