| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal cancellation structure of a power transmission clutch for an automatic transmission, capable of always holding a working medium in a centrifugal cancellation chamber without using an oil pump, and capable of obtaining a centrifugal pressure sufficient to cancel a centrifugal pressure generated in a working fluid in an engagement hydraulic chamber irrespective of a clutch engagement state.SOLUTION: A centrifugal cancellation structure (46) of a power transmission clutch for an automatic transmission comprises: an input shaft (14) to which power is input; a transmission mechanism (16) disposed around the input shaft (14); and a power transmission clutch (18, 20, 22) including an engagement hydraulic chamber (58) to which a working fluid is supplied, an engagement piston (56) receiving a hydraulic pressure by this working fluid, and a centrifugal cancellation chamber (64) provided on an opposite side to the engagement hydraulic chamber (58) across the engagement piston (56), a volumetric change permission unit (68) permitting a volumetric change of an interior of the centrifugal cancellation chamber (64) in response to movement of the engagement piston (56) receiving the hydraulic pressure of the engagement hydraulic chamber (58) being provided at the centrifugal cancellation chamber (64). |
