| 摘要 |
PURPOSE: To bring actual speed change time close to target speed change time and prevent the occurrence of vibration, speed change shock, etc. CONSTITUTION: A speed change controller of an automatic transmission has a hydraulic servo which engages and disengages a friction engagement element, an oil pressure generating means which generates control oil pressure Pc1, Pc2 supplied to the hydraulic servo in accordance with a control oil pressure pattern, and a controller 22. The controller 22 is provided with an actual rotation variable detection means 33 which detects an actual rotation variable of a rotation member, a target rotation variable generating means 34 which generates a target rotation variable of the rotation member, a feedback control means 36 which carries out feedback control based on the target rotation variable and actual rotation variable and outputs control value P, and a speed change logic setting means 36 which compensates the control oil pressure pattern based on the control value P. The target rotation variable generating means 34 changes the target rotation variable without inverting a change rate in positive and negative value at least at either of the time when speed change is started and the time when speed change ends. |
