Patent ID: 7338406
Filing Date: 2008-03-04
Classification: F16H,Y10T

Abstract:
1. A shift control apparatus for a continuously variable transmission, comprising: a primary pulley; a secondary pulley; an endless belt wound on both of the primary and the secondary pulleys; a shift ratio controlling section that controls a shift ratio between the primary pulley and the secondary pulley; a shift speed detecting section that detects a shift speed, the shift speed being a variation quantity of the shift ratio per unit of time: and a shift speed suppression section that suppresses an advance of a shift ratio control by the shift ratio controlling section to suppress the shift speed when a magnitude of the shift speed is equal to or larger than a predetermined value, the shift speed suppression section setting a suppression quantity to suppress the advance of the shift ratio control so as to suppress the shift speed, wherein the shift ratio controlling section includes a feedback controlling section that performs a feedback control for a hydraulic control system of the primary pulley on a basis of a deviation between a target value in accordance with a driving state and a revolution speed corresponding value of the primary pulley in such a manner that the revolution speed corresponding value of the primary pulley is made coincident with the target value and wherein the shift speed suppression section sets the suppression quantity in such a manner that a feedback correction quantity used in the feedback controlling section is reduced in accordance with the shift speed.