Patent ID: 8712649

Claim:
A continuously variable transmission installed in a vehicle, which shifts an output rotation of a power source and transmits the shifted rotation to drive wheels, comprising: a variator capable of varying a speed ratio continuously; a subtransmission mechanism provided in series with the variator and having a first gear position and a second gear position, the second gear position having a smaller speed ratio than the first gear position, as forward gear positions; and a shift control unit which shifts speed ratios of the variator and the subtransmission mechanism in accordance with an operating condition, wherein the shift control unit changes the gear position of the subtransmission mechanism from the first gear position to the second gear position based on a relationship between an operating condition and a mode switch line on a shift map for the continuously variable transmission defined by a primary rotation speed of the variator and a vehicle speed when the gear position of the subtransmission mechanism is at the first gear position, and wherein the shift control unit changes the gear position of the subtransmission mechanism from the second gear position to the first gear position regardless of the relationship between the operating condition and the mode switch line if an accelerator pedal is depressed to or above a predetermined opening when the gear position of the subtransmission mechanism is at the second gear position.