TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSION

摘要

In this toroidal continuously variable transmission, an input disk (15) is easily deformed as a result of the first piston (25) of a hydraulic loader (23) locally applying pressure to the second cylinder housing (15a) of the radial outer end section of the input disk (15), but deformation of the input disk (15) is reduced because the hydraulic pressure of a second oil chamber (28) evenly applies pressure to the entire back surface of the input disk (15). By switching between a first control state in which hydraulic pressure is supplied only to the second oil chamber (28) and a second control state in which hydraulic pressure is provided to both a first oil chamber (27) and the second oil chamber (28), pressure is preferentially applied to the input disk (15) by the hydraulic pressure of the second oil chamber (28), and hydraulic pressure is supplied to the first oil chamber (27) and the first piston (25) is used to apply pressure to the input disk (15) in an auxiliary manner when the hydraulic pressure of the second oil chamber (28) alone is not sufficient. As a result, it is possible to minimize the slipping of a power roller (19) while keeping deformation of the input disk (15) to a minimum.