| 摘要 |
A hydraulic control circuit has: a pressure regulation valve (10) for regulating the discharge pressure of an oil pump (OP); a pressure adjustment valve (20) for adjusting the pilot pressure (P3) of the pressure regulation valve (10) to a torque converter pressure (P4); and an oil passage (53) for connecting the output port (15) of the pressure regulation valve (10) and an oil passage (59). The pressure adjustment valve (20) has: an input port (24) connected to the oil passage (53) through an oil passage (54); a drive pressure port (22) connected to the oil passage (53) through an oil passage (55); a spool (26) axially displaced in response to a drive pressure (P5) inputted into the drive pressure port (22); and an output port (25). The hydraulic control circuit (1) is configured so that the torque converter pressure (P4) is adjusted by the axial movement of the spool (26). A throttle (30) is provided between the connection section (531) where the oil passage (53) and the oil passage (55) are connected and the connection section (541) where the oil passage (53) and the oil passage (54) are connected, and the torque converter pressure (P4) is adjusted to an appropriate pressure. |
