The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2020
Filed:
May. 21, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
Xuefeng T. Tao, Northville, MI (US);
Steven P. Moorman, Dexter, MI (US);
Ronald W. Van Diepen, Ann Arbor, MI (US);
Jeffrey M. DeSimone, Royal Oak, MI (US);
Madhura N. Paranjape, Farmington Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
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 (Δr), 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.