| 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 improving fuel economy.SOLUTION: A centrifugal cancellation structure (46) of a power transmission clutch for an automatic transmission comprises: an input shaft (14) to which power generated by an engine (2) is input; a transmission mechanism (16) disposed around the input shaft (14); a power transmission clutch (18, 22) including an engagement hydraulic chamber (58) to which a working fluid is supplied, an engagement piston (56) having a pressure reception surface (56c) for 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) along an extension direction of the input shaft (14); and a deformable hermetic boxy (68) provided in the centrifugal cancellation chamber (64), having a smaller volume than a volume of the centrifugal cancellation chamber (64) at a time of engagement of the power transmission clutch (18, 22), having a fluid medium filled therein. |
