Gm Global Technolgoy Operations, Inc.

Madhura N Paranjape

Steven Patrick Moorman

Xuefeng Tim Tao

Ronald W Van Diepen

Jeffrey M DeSimone

A method and system for selecting a speed ratio for a continuously variable transmission (CVT) of a vehicle during braking. The method and system includes determining a Current Actual Speed Ratio of the CVT when the distance of a brake pedal travel exceeds a predetermined distance, determining, by a transmission control module (TCM), an amount of Available Speed Ratio Change (&#x394;r), a Current Ratio Change Capability (Current-{dot over (r)}), and a Predictive Ratio Change Capability (Predictive-{dot over (r)}). The method further includes the TCM calculating a Time to Reach the Minimum Under-drive Ratio (t), calculating a Predicted Velocity of the Vehicle (v) using (t), determining a Desired Speed Ratio of the CVT using the Predicted Velocity of the Vehicle (v), and actuating the CVT to the Desired Speed Ratio.

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Farmington Hills, MI, United States of America

Madhura N Paranjape