| 摘要 |
The present invention relates to a hydraulic pressure circuit of an automatic transmission, more specifically, to a hydraulic pressure circuit of an automatic transmission capable of minimizing hydraulic loss. To this end, the present invention provides the hydraulic pressure circuit of an automatic transmission which adjusts line pressure to a constant pressure by means of a regulator valve and supplies working pressure or lubricating hydraulic pressure of a torque converter by controlling a damper clutch control value by means of selective flow switching of a torque converter control value. The damper clutch control value includes a first port selectively receiving control pressure of a damper clutch solenoid value, a second port always receiving control pressure of the torque converter control value, a third port supplying hydraulic pressure supplied to the second port to the torque converter, a fourth port selectively connected to the third port to discharge the hydraulic pressure, a fifth port selectively connected to the third port and supplying damper clutch working pressure supplied to the third port, a sixth port always connected to the fifth port to receive working pressure, a seventh port selectively receiving the control pressure of the torque converter control value, an eighth port receiving lubricating hydraulic pressure if being connected to the fifth port or the seventh port, and a ninth port receiving reduced pressure. |
