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Suspension control apparatus

  • US 9,061,562 B2
  • Filed: 06/26/2013
  • Issued: 06/23/2015
  • Est. Priority Date: 06/29/2012
  • Status: Active Grant
First Claim
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1. A suspension control apparatus for use in a vehicle including a variable damping force damper with a damping force adjustable in accordance with an input signal, the suspension control apparatus comprising:

  • a wheel speed sensor detecting a wheel speed of each wheel of the vehicle;

    a wheel speed variation calculating unit calculating a variation in the wheel speed detected by the wheel speed sensor;

    a basic input amount calculating unit calculating an unsprung weight of a suspension of the vehicle using the calculated variation in the wheel speed;

    a state quantity calculating unit calculating a quantity of state of the vehicle by inputting the calculated unsprung weight into a vehicle model that represents a behavior of the vehicle;

    a damper control unit performing a damper control based on the variation in the wheel speed detected by the wheel speed sensor, by controlling the damping force of the variable damping force damper, the damper control unit performing a skyhook control using the calculated quantity of the state of the vehicle;

    a vehicle body speed estimating unit estimating a vehicle body speed using a vehicle body acceleration of the vehicle; and

    a slip determining unit determining that the wheel is in a slipping state when a value detected by the wheel speed sensor deviates from an estimated wheel speed estimated using the vehicle body speed by a predetermined value or more,wherein, when the slip determining unit determines that the wheel is in the slipping state, the damper control unit suppresses the skyhook control using the calculated quantity of the state of the vehicle.

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