An electronic continuously variable transmission (ECVT) system applicable to a motorcycle includes a first speed sensor, second speed sensor, continuously variable transmission (CVT) and control unit. The control unit receives a user control signal and accordingly controls a speed-changing state of the CVT. While the motorcycle is operating in a manual-operation mode, the control unit predicts, according to the user control signal, a first speed signal sent from the first speed sensor, and a second speed signal sent from the second speed sensor, whether the next gear indicated by the shift request signal will cause the motorcycle to move unsteadily. If so, the control unit ignores the shift request signal and refuses to perform gear shifting. If not, the control unit sends at least a shift control signal to the CVT so that the CVT performs gear shifting.

An electronic continuously variable transmission (ECVT) system applicable to a motorcycle includes a first speed sensor, second speed sensor, continuously variable transmission (CVT) and control unit. The control unit receives a user control signal and accordingly controls a speed-changing state of the CVT. While the motorcycle is operating in a manual-operation mode, the control unit predicts, according to the user control signal, a first speed signal sent from the first speed sensor, and a second speed signal sent from the second speed sensor, whether the next gear indicated by the shift request signal will cause the motorcycle to move unsteadily. If so, the control unit ignores the shift request signal and refuses to perform gear shifting. If not, the control unit sends at least a shift control signal to the CVT so that the CVT performs gear shifting.

Provided herein is a control system for a multiple-mode continuously variable transmission 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. The system also has a ratio shift 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.