| 摘要 |
PURPOSE: A hydraulic control device of an automatic transmission is provided to achieve high-speed level during high-speed travel and to secure driving force by achieving another level. CONSTITUTION: A hydraulic control device of an automatic transmission is equipped with plural interlock fit components, plural hydraulic servos for supply of hydraulic pressure to operate the interlock fit components, and plural shift devices outputting hydraulic pressure supplied to the hydraulic servos. The hydraulic control device of an automatic transmission has switching devices(60,61) and a supply-switching device(59). The switching devices applies hydraulic pressure, output when all shift devices(54¯57) are hydraulic output state, to signal pressure, and shuts off the feeding passage of hydraulic pressure into specific hydraulic servos(62,65) and switches into a state having achievement of a specific gear level among plural gear levels. The supply-switching device is disposed to the feeding passage into a hydraulic servo(64) not included in a specific hydraulic servo and the supply-switching device switches the supply and shutting off of hydraulic pressure into the hydraulic servo.
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