| 摘要 |
In an automatic transmission 20, an engagement oil chamber 150 and a centrifugal oil pressure cancel chamber 190 of a clutch C1 corresponding to a third ring gear 23r of a Ravigneaux type planetary gear mechanism 25 are defined by a drum member 130, a piston 140, and a cancel plate 170 that rotate integrally with the third ring gear 23r. An engagement oil chamber 250 and a centrifugal oil pressure cancel chamber 290 of a clutch C2 corresponding to a third sun gear 23s of the Ravigneaux type planetary gear mechanism 25 are defined by a shaft portion 230, a piston 240, and an oil-chamber defining member 270 that rotate integrally with the third sun gear 23s. |
