| 摘要 |
PURPOSE:To simplify a structure so as to reduce the cost by making settable an oil path, in which a line pressure can be detected in a switching valve of performing duty control of a clutch operating pressure, separately from an oil path to which an operating pressure of oil set by a clutch modulator valve is applied. CONSTITUTION:In a hydraulic control mechanism in a continuously variable transmission, the mechanism provides a clutch control pressure switching valve 27 for switching a direction of supplying oil to a side of an operation mode selecting manual valve 28 through a clutch pressure control valve 25 and a direction of supplying oil to a damper clutch control valve 24 for controlling operation of a damper clutch in a fluid coupling. This switching valve 27 is provided with a spool valve 27A actuated by an input pressure from a clutch pressure modulate valve 26. When the spool valve 27A is placed in the first position where the manual valve 28 is placed in a neutral position, a clutch pressure controlling duty solenoid valve 20C is feedback-controlled in accordance with a pressure of oil in an oil pressure detecting oil path 30. |
