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System for the active control of a motor vehicle differential

  • US 20020016661A1
  • Filed: 06/04/2001
  • Published: 02/07/2002
  • Est. Priority Date: 06/05/2000
  • Status: Active Grant
First Claim
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1. A system for the active control of a motor vehicle differential comprising an input shaft intended to transmit torque to two output shafts or half-shafts associated with respective different wheels of the motor vehicle, and coupling means selectively controllable by means of corresponding actuators for modifying the division of the torque between the half-shafts;

  • the control system being characterised in that it comprises;

    generator means operable to provide signals indicative of the angle of rotation of the steering wheel, the speed of the vehicle, the yaw rate of the vehicle, as well as the longitudinal acceleration and transverse acceleration of the vehicle;

    first control means operable to determine a reference yaw rate value as a function of the values of the angle of rotation of the steering wheel and the speed of the vehicle, and to generate a first signal for controlling the yawing torque on the basis of a predetermined mathematical model of the behaviour of the motor vehicle and as a function of the determined reference value of the yaw rate, second control means arranged to generate a second signal for controlling the yawing couple as a predetermined function of the longitudinal acceleration of the vehicle, and control circuit means means arranged to generate electrical signals for piloting the said actuator devices as a function of the said first and second yaw rate control signals.

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