Gm Global Technolgoy Operations, Inc.

Jeffrey M DeSimone

Steven Patrick Moorman

Xuefeng Tim Tao

Ronald W Van Diepen

Madhura N Paranjape

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.

Growing community of inventors

Royal Oak, MI, United States of America

Jeffrey M DeSimone