| 摘要 |
Disclosed is a hydraulic control system. The system includes an oil pump; a pressure regulator valve; a torque converter which converts engine power to torque; a converter clutch regulator valve; a solenoid supply valve; a manual valve which is indexed by a selector lever; a torque control regulator valve for supplying drive pressure from the manual valve to friction elements in each shift stage; first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth friction elements, one or more of which are operated to control each stage; a control switch valve; 1-2, 2-3, 3-4, and 4-5 shift valves receiving torque pressure or line pressure and selectively supplying drive pressure from the manual valve to the friction elements; second and third clutch valves, a fourth band valve, and an overdrive unit valve controlled by torque pressure and which supply drive pressure to the friction elements and drive pressure of a subsequent shift stage to the shift valves; and a N-D control valve which receives line pressure, drive pressure, and torque pressure to control the first friction element using line pressure in a neutral N range, the first friction element using torque pressure and the third friction element using first torque pressure then drive pressure when shifting from the neutral N range to a drive D range.
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