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Vehicle body drifting suppression device

  • US 8,954,233 B2
  • Filed: 05/13/2009
  • Issued: 02/10/2015
  • Est. Priority Date: 05/16/2008
  • Status: Expired due to Fees
First Claim
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1. A vehicle body drifting suppression device configured to perform a vehicle body drifting suppression control that suppresses a vehicle body drifting toward a lower portion of a road surface on which the vehicle body is traveling, the lower portion being lower with respect to a horizontal direction of the road surface due to an inclination of the road surface crosswise to a direction of travel of the vehicle body comprising:

  • a steering torque detection unit which detects a steering torque of a vehicle;

    a yaw rate detection unit which detects a yaw rate of the vehicle,a steering angle detection unit which detects a steering angle,a vehicle body drifting assertion part which asserts that the vehicle is in a drifting status when;

    an absolute value of the yaw rate is equal to or smaller than a predetermined yaw rate value;

    an absolute value of the steering angle is equal to or greater than a predetermined steering angle value; and

    an absolute value of the steering torque is equal to or greater than a predetermined steering torque value, wherein when the vehicle body drifting assertion part asserts that the vehicle is in a drifting status;

    a vehicle body drifting suppression is performed according to a vehicle body drifting suppression control-amount, andthe vehicle body drifting suppression control-amount is adjusted according to a temporal sustention status of the steering torque, andwhen the vehicle is not in the drifting status, regardless of a previous value of the vehicle body drifting suppression control-amount, the vehicle body drifting suppression control-amount is set to 0,wherein when the steering torque is maintained at a value equal to or larger than a first predetermined value for longer than a first predetermined amount of time, the vehicle body drifting suppression control-amount is increased over the previous value, and when the previous value of the vehicle body drifting suppression control-amount is set equal to or greater than a predetermined amount larger than 0 and the steering torque is maintained at an absolute value equal to or smaller than a second predetermined value for longer than a second predetermined amount of time, the vehicle body drifting suppression control-amount is decreased smaller than the previous value,wherein the second predetermined value is smaller than the first predetermined value.

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