Continuously variable transmission

摘要

A transmission (20) includes a gear ratio change mechanism (20a) and an ECU (7). The gear ratio change mechanism (20a) has a crankshaft (11) as an input shaft, an output shaft (22a1), and a motor (30). The motor (30) continuously varies the gear ratio between the crankshaft (11) and the output shaft (22a1). The ECU (7) performs feedback control of the gear ratio to achieve a target gear ratio. The ECU (7) is configured to detect a hunting state of the gear ratio to reduce an output of the motor (30) when a hunting state of the gear ratio is detected.