Patent ID: 6597976
Filing Date: 2003-07-22
Classification: F16D,F16H,Y10T

Abstract:
A continuously variable transmission comprising: an input device with a first pair of conical discs and an output device with a second pair of conical discs, the first and second pairs of conical discs being adjustable in relation to each other by adjusting a transmission ratio between the first and second pairs of conical discs; an endless flexible torque-transmitting device connecting the first and second pairs of conical discs; an actuator device performing on the input device and the output device at least one of the actuator functions of adjusting a shift position of said devices in relation to each other and of holding said devices at a set shift position, wherein the adjusting is performed by exerting a first adjusting force on the input device and a second adjusting force on the output device, and whereing the holding is performed by exerting a first holding force on the input device and a second holding force on the output device; a control device generating a control signal and transmitting said control signal to the actuator device, whereupon the latter performs said at least one actuator function dependent on said control signal; and a computing device for computing and, if necessary, repeatedly adapting, a first at least two-dimensional characteristic data array, wherein the continuously variable transmission further has a first characteristic operating value, and the first characteristic data array describes a functional dependency of the first characteristic operating value on at least one further characteristic operating value; wherein the first characteristic operating value is dependent on the ratio between the first holding force and the second holding force.