Patent ID: 6682457
Filing Date: 2004-01-27
Classification: F16H

Abstract:
A toroidal continuously variable transmission comprising:a housing, input and output side discs coaxially disposed with each other and rotatably relative to each other within said housing, a plurality of trunnions rockable around respective pairs of coaxial pivot shafts located at positions twisted with respect to center lines of said input and output side discs, displacement shafts supported by the respective trunnions, and a plurality of power rollers rotatably supported on said displacement shafts and pinched between inner surfaces of said input and output discs, wherein said inner surfaces of said input and output side discs have in section arcuate concave surfaces, and peripheral surfaces of the power rollers have spherical convex surfaces which are in contact with said inner surfaces, and traction oil can be supplied to contact areas between said inner surfaces of said discs and said peripheral surfaces of said power rollers, and wherein the amount of traction oil supplied is controlled by a control system which operates such that the amount of the traction oil supplied is increased with increasing power transmitted from said input side disc to said output side disc as torque transmitted by the transmission is increased.