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System and method for controlling vehicle speed

  • US 9,573,595 B2
  • Filed: 08/16/2013
  • Issued: 02/21/2017
  • Est. Priority Date: 08/16/2012
  • Status: Active Grant
First Claim
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1. A speed control system for a vehicle, comprising:

  • an electronic control unit (ECU), the ECU configured to;

    detect an occurrence of at least one of a slip event and a step encounter event at a leading wheel of the vehicle;

    predict that the occurrence of said detected at least one of a slip event and a step encounter event will occur at a following wheel of the vehicle; and

    output a signal to automatically control at least one of vehicle speed and vehicle acceleration in response to one or both of said detecting and said predicting, the ECU being configured to output a signal to control a powertrain subsystem to adjust an amount of torque applied to each of the leading wheel and the following wheel based upon said detecting an occurrence of at least one of a slip event and a step encounter event at the leading wheel of the vehicle, and wherein the ECU is configured to output a signal to reduce the amount of torque applied to the following wheel approximately when the predicted occurrence of said at least one of a slip event and a step encounter event will occur at the following wheel, and wherein the ECU is configured to output a signal to temporarily reduce the amount of torque applied to the leading wheel in response to said detecting an occurrence of at least one of a slip event and a step encounter event at the leading wheel, and wherein the reduction of the amount of torque applied to the following wheel is approximately equal to the reduction of the amount of torque applied to the leading wheel when said at least one of a slip event and a step encounter event was detected at the leading wheel.

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