Suspension control apparatus

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 basic input amount calculating circuit calculating a basic input amount for the vehicle on the basis of a variation in the wheel speed detected by the wheel speed sensor;
• a state quantity calculating circuit calculating a quantity of state of the vehicle by inputting the basic input amount into a vehicle model that represents a behavior of the vehicle;
• a damper controller 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 on the basis of the calculated quantity of the state of the vehicle;
• a vehicle body speed estimating circuit estimating a vehicle body speed on the basis of a vehicle body acceleration of the vehicle;
• and
• a slip determining computer 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 based on the vehicle body speed by a predetermined value or more,
• wherein, when the slip determining computer determines that the wheel is in the slipping state, the damper controller suppresses the damper control based on the variation in the wheel speed detected by the wheel speed sensor.