Patent ID: 9002595
Filing Date: 2015-04-07
Classification: B60W,B60Y,F16H,Y10T

Abstract:
1. A method of controlling speed in a machine having a continuously variable transmission (CVT) operatively coupled to a power source; the method comprising: regulating a CVT output of the CVT in accordance with a rimpull torque-to-speed curve including a generally inverse relation between a CVT output torque and a CVT output speed, the rimpull torque-to-speed curve limiting the CVT output torque; receiving a first operator input signal indicating a desired change in a machine output; converting the first operator input signal to a first scale factor; shifting the rimpull torque-to-speed curve based in part on the first scale factor to reduce the CVT output torque available; and applying an under-run curve to the rimpull torque-to-speed curve, the under-run curve corresponding to a first target speed of the machine and limiting the CVT output speed.