| 摘要 |
PROBLEM TO BE SOLVED: To provide manual speed change control for which a countermeasure may be taken against overheat by constituting so that, even when selecting manual speed change range, forced change to automatic speed change range can be made when the working hot water temperature of an automatic transmission exceeds a predetermined value. SOLUTION: First, judgment is made when the speed is in M range or not (S21), and the working hot water temperature TMP is lower than the automatic transmission TMPH or not (S22). As a countermeasure against overheat, forced change is made from M range to D range (S24). When judgment is made that downshift speed change command is given as a countermeasure against overheat (S25), downshift speed change is performed as commanded, operation is performed for preventing overheat of the automatic transmission, and after that, return is performed from D range to M range (S27). As mentioned above owing to the forced change from M range to D range, the automatic transmission which has been in overheat state produces downshift speed change as a result of the forced range change, and thus overheat state disappears. |
