| 摘要 |
A working fluid distributing system for a continuously-variable speed automatic transmission comprising a fluid coupling; a belt drive continuously-variable speed transmission means including a primary variable-pitch pulley, a secondary variable-pitch pulley and an endless belt interconnecting the primary and the secondary variable-pitch pulleys and capable of attaining continuously-variable speed drive; a change-direction gear train; and a hydraulic control circuit for supplying the working fluid to the component brakes and clutches. The working fluid distributing system further comprises a supporting collar attached to the wall portion of the housing of the automatic transmission, which wall portion being disposed perpendicularly to the input shaft of the belt drive transmission means. The supporting collar rotatably supports, on the outer surface thereof, the pump impeller of the fluid coupling and, on the inner surface thereof, the input shaft. A plurality of pockets are formed independently of each other and in an arrangement along the circumferential direction in the inner surface of the supportng collar. The respective pockets communicate with fluid passages bored in the housing wall radially with respect to the axis of the supporting collar and a working fluid source. Pressurized working fluid is supplied to the respective hydraulic servomechanisms for operating the clutch functioning to connect the primary variable-pitch pulley of the belt drive transmission means to the turbine runner of the fluid coupling and for operating the brake functioning to actuate the change-direction gear train through the pockets formed in the supporting collar and the fluid passages bored radially in the wall portion of the housing.
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