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Drive control device with traction control function for right-left independent drive vehicle

  • US 10,029,678 B2
  • Filed: 12/06/2016
  • Issued: 07/24/2018
  • Est. Priority Date: 06/09/2014
  • Status: Active Grant
First Claim
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1. A drive control device with a traction control function for a right-left independent drive vehicle, the right-left independent drive vehicle including a left drive wheel driven by a drive source for the left drive wheel, a right drive wheel driven by a drive source for the right drive wheel, an electronic control unit (ECU) that performs general integrated control and cooperative control of the right-left independent drive vehicle, the ECU having a torque allocation unit configured to provide torque commands for each of the left drive wheel and the right drive wheel, the drive control device comprising:

  • a torque control unit configured to control the drive source for the left drive wheel in accordance with the torque commands provided from the torque allocation unit;

    a torque control unit configured to control the drive source for the right drive wheel in accordance with the torque commands provided from the torque allocation unit;

    a traction control unit for the left drive wheel configured to perform traction control for inhibiting a slip of the left drive wheel during acceleration or deceleration and to provide a driving torque command that is a result of the control, to the torque control unit configured to control the drive source for the left drive wheel,a traction control unit for the right drive wheel configured to perform traction control for inhibiting a slip of the right drive wheel during acceleration or deceleration and to provide a driving torque command that is a result of the control, to the torque control unit configured to control the drive source for the right drive wheel;

    a longitudinal force estimation unit for the left drive wheel configured to estimate longitudinal forces acting on the left drive wheel;

    a longitudinal force estimation unit for the right drive wheel configured to estimate longitudinal forces acting on the right drive wheel; and

    a longitudinal force coincidence control unit configured to compare absolute values of the longitudinal forces estimated by the longitudinal force estimation unit for the left drive wheel and the longitudinal force estimation unit for the right drive wheel, and to provide a driving torque command that generates a longitudinal force equal to the longitudinal force whose absolute value is smaller, to the one of the torque control units for the left drive wheel and right drive wheel at which the absolute value is larger,wherein the driving torque command provided by the longitudinal force coincidence control unit replaces the driving torque command from the traction unit.

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