CONTROL METHOD FOR SYNCHRONOUS SHIFTING OF A TRANSMISSION COMPRISING A CONTINUOUSLY VARIABLE PLANETARY MECHANISM

摘要

A control system for a multiple-mode continuously variable transmission is described as having a ball planetary variator operably coupled to multiple-mode gearing. The control system has a transmission control module configured to receive a plurality of electronic input signals, and to determine a mode of operation from a plurality of control ranges based at least in part on the plurality of electronic input signals. In some embodiments, the system also has a ratio schedule module configured to store at least one shift schedule map, and configured to determine a desired speed ratio of the variator based at least in part on the mode of operation; a variator control module configured to receive the desired speed ratio and configured to determine an actuator setpoint signal based at least in part on the mode of operation; and a torque reversal module.