| 摘要 |
An automatic transmission comprising as the essential units thereof a torque converter transmission, a hydraulic actuation circuit and electrical circuitry for controlling the distributor valve incorporated in the hydraulic actuation circuit, wherein the working oil pressure applied to the transmission is reduced according to a signal generated upon gear change so as to eliminate the shock caused during the gear change; whereas while the torque is being transmitted excepting during such gear change, the working oil pressure is maintained at a sufficiently high value in order to prevent the slippage of the friction engaging means in the transmission. |
