Patent ID: 9239099
Filing Date: 2016-01-19
CPC Classification: F16H,Y10T

Claim Text:
1. A method of changing the ratio of a variator of a continuously variable or infinitely variable transmission (CVT/IVT), the variator comprising a plurality of spherical rollers arranged about a central axis and interposed between a first traction ring and a second traction ring, each spherical roller being rotatable about an axle, the method comprising the steps of: determining a desired speed ratio for the transmission; sending a control signal to a hydraulic control valve operably coupled to a plurality of hydraulic pistons, wherein the plurality of planet axles of the variator are operably coupled to at least one of the plurality of hydraulic pistons; and supplying a hydraulic pressure from the hydraulic control valve to at least one of the plurality of hydraulic pistons based on the control signal, wherein one or more of the hydraulic pressure and the rate at which hydraulic pressure is applied actuates a change in a tilt angle of at least one of the planet axles to the desired speed ratio.