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Vehicle steering control system

  • US 5,774,819 A
  • Filed: 06/07/1995
  • Issued: 06/30/1998
  • Est. Priority Date: 07/27/1994
  • Status: Expired due to Fees
First Claim
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1. A vehicle steering control system, comprisingsteering torque input means;

  • powered steering control means for applying a first actuating torque to steerable wheels of a vehicle according to a steering torque applied to said steering torque input means;

    means for detecting a lateral dynamic condition of said vehicle;

    active reaction generating means for applying a second actuating torque to said steerable wheels so as to control a turning movement of said vehicle according to a signal supplied from said detecting means, said second actuating torque being determined according to a deviation of an actual lateral dynamic response of said vehicle from a reference lateral dynamic response that is computed for each given steering input; and

    means for detecting an understeer condition from said deviation, and suppressing said second actuating torque when an understeer condition is detected on a steady basis.

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