Patent ID: 6217469
Filing Date: 2001-04-17
Classification: F16H,Y10T

Abstract:
A control system comprising:a continuously variable transmission (CVT) comprising a driver pulley, a follower pulley and a belt intercoupling the pulleys, said, CVT varying a transmission ratio by changing effective diameters of the pulleys;a CVT pressure control valve controlling a pressure of working fluid to be supplied to said CVT according to a command signal;a centrifugal pressure detecting means for detecting a centrifugal pressure of the working fluid in the pulley;a centrifugal pressure deciding means for deciding that the centrifugal pressure is in a centrifugal pressure dominant range in which motive power is transmitted only by the centrifugal pressure; anda limit value switching means to switching a limit value of the command signal from a high response value to a high stability value when the centrifugal pressure is in the centrifugal pressure dominant range.