Patent 7920949 was granted and assigned to Caterpillar Inc. on April, 2011 by the United States Patent and Trademark Office.
A variator torque control system and method utilize a hydraulic actuator to control the variator output via a torque control map, wherein the values of the torque control map are evaluated and modified during use of the map to improve map accuracy. In an example, errors in the map are evaluated to determine whether a system fault has occurred.