| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic controller for vehicular automatic transmission, which improves fuel consumption by obtaining an estimated value of the input torque of the automatic transmission with high precision and by reducing power loss as much as possible in the hydraulic control based on the estimated value of the input torque. SOLUTION: When a stable-state determining means 96 determines the vehicle is not in a stable state, a hydraulic control means 98 controls the hydraulic pressure of the automatic transmission 14 based on the input torque TIN estimated by a first input torque estimating means 90 without delay, and the stable- state determining means 96 determines that the vehicle is in a stable state, the hydraulic control means 98 controls the hydraulic pressure of the automatic transmission 14 based on the input torque TIN estimated by a second input torque estimating means 92 with delay but with high precision. The estimated value of the input torque TIN of the automatic transmission 14 is obtained with high precision based on the vehicle state, and the power loss is reduced at the earliest in the hydraulic control of line hydraulic pressure based on the estimated value of the input torque TIN, thus improving fuel consumption. |
