| 摘要 |
The present invention provides an automatic transmission control device which can obtain proper shift-down timing by taking deceleration and an engine rotational speed into consideration. An automatic transmission control device includes a means which detects the deceleration, a means which detects an engine rotational speed, a means which stores a peak Ne which is a peak value of the engine rotational speed during a period in which a vehicle travels with one predetermined gear, a map which induces a shift-down ”Ne from the deceleration, and a means which performs a shift-down when the engine rotational speed is lowered from the peak Ne by the shift-down ”Ne. The larger the deceleration, the shift-down ”Ne is set to a smaller value and hence, the larger the deceleration, the shift-down is performed with the larger rotational speed. Further, when the engine rotational speed is lowered from the peak Ne by the shift-down ”Ne, by operating a timer which restricts the shift-down for a predetermined period, it is also possible to prevent the occurrence of an excessive transmission shock attributed to the continuous shift-down. |
