SHIFT CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

PROBLEM TO BE SOLVED: To curb shift shock when a friction element at an engagement side is engaged in a manner that appropriately controls a timing of the friction element at the engagement side to start transmission of drive torque.SOLUTION: A shift control device for an automatic transmission comprises a shelf pressure learning section which performs learning correction of first shelf pressure Pin first hydraulic pressure holding control so that a second timing tcoincides with a predetermined specific timing ton the basis of: a first timing t, a timing that a filling amount of hydraulic oil for a hydraulic actuator reaches a transmission start filling amount with which a friction element starts transmission of drive torque when actually executing second hydraulic pressure holding control without executing the first hydraulic pressure holding control after precharge control by a shift control section; and a second timing t, a timing that the filling amount of the hydraulic oil for the hydraulic actuator reaches the transmission start filling amount when executing the second hydraulic pressure holding control following the first hydraulic pressure holding control after the precharge control by the shift control section.SELECTED DRAWING: Figure 5 【課題】締結側摩擦要素が駆動トルクを伝達し始めるタイミングを適切に制御して、該締結側摩擦要素の締結の際に発生する変速ショックを抑制する。【解決手段】変速制御部によるプリチャージ制御の後、第１油圧保持制御を実行せずに、第２油圧保持制御を実際に実行したときに、油圧アクチュエータへの作動油の充填量が、摩擦要素が駆動トルクを伝達し始める充填量である伝達開始充填量に到達するタイミングである第１タイミングｔＣＶと、変速制御部によるプリチャージ制御の後、第１油圧保持制御を実行して、その後第２油圧保持制御を実行したときに、油圧アクチュエータへの作動油の充填量が上記伝達開始充填量に到達するタイミングである第２タイミングｔＲとに基づいて、該第２タイミングｔＲが、予め設定された特定タイミングｔＳと同等になるように、第１油圧保持制御における第１棚圧ＰＨ１を学習補正する棚圧学習部を備える。【選択図】図５