Patent ID: 7326147
Filing Date: 2008-02-05
Classification: F16H,Y10T

Abstract:
1. A continuously variable transmission apparatus combined with a toroidal continuously variable transmission and a planetary gear transmission via a clutch apparatus, wherein the clutch apparatus comprising: a low speed clutch connected in realizing a low speed mode of increasing a gear change ratio of the continuously variable transmission apparatus and disconnected in realizing a high speed mode of reducing the gear change ratio of the continuously variable transmission apparatus; a high speed clutch connected in realizing the high speed mode and disconnected in realizing the low speed mode; and a controller for switching a state of connecting and disconnecting the respective clutches; and wherein the controller brings a speed change state into either mode of the low speed mode and the high speed mode by controlling to connect and disconnect the respective clutches; and the controller has a function, in switching the low speed mode and the high speed mode, that, prior to start to connect one of the low speed clutch and the high speed clutch which has not been connected, by adjusting the transmission ratio of the toroidal continuously variable transmission, the one clutch is started to connect after making rotational speeds of a pair of members connected via the one clutch substantially coincide with each other, and after starting to transmit a power by the one clutch, an operation of disconnecting other clutch which has been connected is started, whereby an instance of simultaneously transmitting the power by the two clutches is set during a time period until disconnecting the other clutch after starting to transmit the power by the one clutch.