Patent ID: 8323141
Filing Date: 2012-12-04
Classification: F16H,Y10T

Abstract:
1. A continuously variable transmission installed in a vehicle, 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; a through speed ratio setting unit which sets, on the basis of an operating condition of the vehicle, an overall through speed ratio of the variator and the subtransmission mechanism to be realized in accordance with the operating condition; a shift control unit which controls at least one of the speed ratio of the variator and the gear position of the subtransmission mechanism on the basis of the through speed ratio; and a shift prohibition determining unit which determines whether or not shifts have been prohibited in the subtransmission mechanism on the basis of the operating condition of the vehicle, wherein, when shifts are determined to be prohibited in the subtransmission mechanism, the through speed ratio setting unit limits the through speed ratio to a speed ratio range that can be realized only by a shift in the variator.