Patent ID: 6612964
Filing Date: 2003-09-02
Classification: F16H,Y10T

Abstract:
A method of controlling a transmission ratio, which comprises the steps of:providing a continuously variable toroidal transmission, the toroidal transmission having at least one pair of toroidal disks including an input disk and an output disk and at least one intermediate roller in power-transmitting contact with the toroidal disks, the toroidal transmission further having an adjustable pivot-bearing configuration supporting the intermediate roller; setting the transmission ratio by defining a continuously variable pivoted position of the intermediate roller between the input disk and the output disk; controlling the transmission ratio by feeding an actual transmission ratio back to an input of a control circuit for defining the transmission ratio and a desired transmission ratio to the control circuit, a deviation between the desired transmission ratio and the actual transmission ratio being compensated for by adjusting at least one of a holding force of the pivot-bearing configuration and an adjustment path of the pivot-bearing configuration of the intermediate roller; pilot-controlling the holding force as a function of torques acting on the toroidal disks and the pivoted position of the intermediate roller; and feeding back the adjustment path of the pivot-bearing configuration of the intermediate roller one of statically and dynamically into the control circuit.