| 摘要 |
An automatic transmission hydraulic control circuit for controlling forward and reverse hydraulic clutches provided in an automatic transmission for setting a vehicle to a selected state among forward, reverse and neutral states, includes a main pressure transmission line for selectively transmitting a main pressure for operating only one at any time of the forward or reverse hydraulic clutch, forward/reverse selecting valves for switching the main pressure transmission line to set the vehicle to the selected state; and a neutral valve for interrupting transmission of the main pressure setting the vehicle to the forward or reverse state opposite to the selected state when the forward/reverse selecting valves cannot operate. The main pressure is supplied to the hydraulic clutches via the forward/reverse selecting valves as well as the neutral valve.
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