Patent ID: 8554428

Claim:
A powertrain control system associated with a power source and a CVT coupled to an output of the power source, comprising: a controller in communication with the power source and the CVT, wherein the controller includes a map with a plurality of speed modes including at least a first speed mode and a second speed mode, the controller being configured to transition from the first speed mode to the second speed mode as a result of a ground speed exceeding a threshold speed, the map including a power source speed limit for the plurality of speed modes, wherein the power source speed limit of the first speed mode varies as a function of ground speed for a constant machine load, the power source speed limit of the first speed mode for a constant machine load having: a first value at zero ground speed, and a second value at a ground speed greater than zero, wherein the first value is greater than the second value, wherein for the first speed mode, the controller is configured to: allow direct modulation of an actual power source speed up to, but not above, the power source speed limit via an operator input device.