| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an automatic transmission of vehicle which gives favorably a degree of tie-up occurring during a clutch-to-clutch transmission period. SOLUTION: In a down transmission period of 4→3 which is a clutch-to-clutch transmission, when a primary differential value DNIN of an input axis rotational speed NIN is calculated sequentially by a primary differential value calculation means 154, the primary differential value DNIN is calculated sequentially and an integrated value DDNIN is calculated by an integration means 160, then the integrated value DDNIN is output as a value indicating a degree of tie-up, and therefore a degree of tie-up occurring during a clutch-to-clutch transmission period is favorably given. Consequently, since a learning correction k (DDNIN- DDNIN1) varying along the degree of tie-up is determined in learning control to eliminate a tie-up coming from a tie-up learning control means 146 and enhance a transmission feeling, the tie-up is promptly settled. |
