CONTROL DEVICE OF BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PURPOSE:To prevent response delay by controlling a driving pulley unit driving means till the desired value of the interval between a movable pulley and a fixed pulley accord with the calculated value. CONSTITUTION:At an input axis 14 of a belt type continuously variable transmission mechanism 13, a driving pulley unit 17 having a fixed pulley 15 and a movable pulley 16 which is capable of sliding in the axial direction is provided. The belt effective radius in the driving pully unit 17 corresponds one to one to the interval between the fixed pulley 18 and the movable pulley 16. And a movable pulley sensor 40 is arranged on the inclined tapered surface on the back side of the movable pulley 16 and detects the moving amount of the movable pulley 16 against the fixed pulley 15. The movable pulley position sensor detected value and the movable pulley position desired detected value are compared in CPU 35, and the both detected values are made accordant by an electromagnetic directional control valve 29. At this time, as modification is applied to the position of the movable pulley 16 by the deviation between the output axis rotational number and the output axis desired rotational number so as to bp finely adjusted, the output axis rotational number can be controlled with high accuracy.