| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control method of an automatic transmission and a device thereof capable of carrying out a smooth kick down even in any accelerator opening. SOLUTION: This hydraulic control device of an automatic transmission is provided with at least throttle opening sensor 3; a car speed sensor 4 for detecting a car speed; a hydraulic control means 6 to which signals S3A, S3B, S4A, S4B are inputted from the respective sensors 3, 4; and a line pressure solenoid 14 to which a signal S9 is inputted from the hydraulic control means 6. A throttle opening memory means 8 for memorizing the signal S3B of the throttle opening sensor 3 is previously provided in the hydraulic control means 6 and at the time of judging a speed-change, a line pressure control means for controlling a line pressure at the time of the speed-change by a throttle opening of the throttle opening memory means at a predetermined time before the time of judging the speed-change. Thereby, at the time of judging the speed-change, a smooth connection of a clutch is realized not depending on the throttle opening before the time of judging the speed-change by controlling the line pressure at the time of the speed-change based on the throttle opening at the predetermined time before the time of judging the speed-change. |
