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Turn control apparatus for a vehicle

  • US 5,645,326 A
  • Filed: 06/28/1996
  • Issued: 07/08/1997
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Term
First Claim
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1. A vehicle turn control apparatus, which includes a hydraulic circuit connecting a master cylinder connected to a brake pedal and wheel brakes provided corresponding individually to wheels of a vehicle, a pump adapted to generate and supply a hydraulic pressure to the hydraulic circuit when actuated, and a hydraulic pressure control valve unit arranged in the hydraulic circuit so as to be located between the pump and the wheel brakes and adapted to adjust the hydraulic pressure generated by the pump, and which supplies the hydraulic pressure, generated by the pump and adjusted by means of the hydraulic pressure control valve unit, to one or more required wheel brakes while there is a turn control request, said apparatus comprising:

  • required control valve calculating means for deriving a required control valve for yaw moment control in accordance with an operating condition and/or behavior of the vehicle;

    pre-pressurization control means for actuating the pump when a first predetermined value is reached by the required control valve; and

    hydraulic pressure control means for controlling the operation of the hydraulic pressure control valve unit in accordance with the required control valve, the hydraulic pressure control means being adapted to discriminate the turn control request and start the operation control for the hydraulic pressure control valve unit when a second predetermined value greater than the first predetermined value is reached by the required controlled variable.

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