| 摘要 |
PROBLEM TO BE SOLVED: To suppress shifting shocks, even if an anomaly occurs in either one of an input shaft rotational frequency sensor or an output shaft rotational frequency sensor, in an inertia phase during shifting by an automatic transmission. SOLUTION: When an anomaly is detected in either one of the input shaft rotational frequency sensor 19 or the output shaft rotational frequency sensor 21 during the control period of the inertia phase during shifting by the automatic transmission 1, F/B control of control oil pressure cannot be maintained so that F/F control by a predetermined pressure intensifying gradient is conducted in its place. By this, excessive or too less control oil pressure due to the anomaly of the input shaft rotational frequency sensor 19 for detecting an input shaft rotational frequency Nt or the output shaft rotational frequency sensor 21 for detecting an output shaft rotational frequency No during shifting by the automatic transmission 1 is prevented, for satisfactorily causing oil pressure control to continue and suppress shifting shocks to be suppressed.
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