| 摘要 |
PURPOSE:To improve excessive study correction and insufficiency of a study correction amount corresponding to a torque fluctuation relating to an automatic transmission. CONSTITUTION:A speed change control device for an automatic transmission is provided with a hydraulic actuator (b) for controlling a pressure of oil of connecting a friction connecting element (a), detecting means (c) for detecting an element relating to a speed change, control means (d) for controlling a pressure of oil for controlling the hydraulic actuator (b) driven and a study correcting part (e) contained in the control means (d) to study-correct a method for hydraulically controlling the control means (d). The transmission has a torque detecting means (f) for detecting the actual input torque of an input shaft of the automatic transmission, as a detecting means of the study correcting part (e). The study correcting means (e) is constituted by study-correcting a method of hydraulic control in a speed change thereafter based on the actual input torque of the input shaft. |
