| 摘要 |
PURPOSE:To secure the correct line pressure by obtaining a constant reducing pressure through a reducing valve and obtaining a constant duty pressure by correcting the duty ratio according to the oil temperature. CONSTITUTION:In a control unit 70, the actual speed change ratio in an actual speed change ratio calculating part 75 and an aimed speed change ratio are input into a speed change speed calculating part 78, and the duty ratio is obtained by determining the shift-up/down. In a line pressure control system, the duty ratio is corrected according to the output of an oil temperature sensor 86, and the obtained value is input into a solenoid valve 65. Therefore, the error due to the oil temperature is eliminated, and correct line pressure can be obtained. |
