Vehicle speed control system that predicts a change in vehicle drag that may result in a speed overshoot/undershoot

摘要

A method for operating an off-road speed control system of a vehicle 100 comprises identifying 102 a pattern or change in component of vehicle drag. A vehicle speed is monitored 104 to predict whether a change in component of vehicle drag results in speed overshoot event or a speed undershoot event, preferable due to gradient and/or terrain. The application of an appropriate opposing torque is automatically commanded 106 to vehicle wheel to counteract predicted speed overshoot event or speed undershoot event. The predicted speed overshoot event is identified as a predicted temporary over-supply of torque from a powertrain subsystem of the vehicle. An off-road speed control system for a vehicle comprising an electronic control unit (ECU) configured to perform the above-described methodology is also provided.