| 摘要 |
PURPOSE:To prevent a speed change shock by delaying the outputting of a shift down signal a time corresponding to the change rate of rotational frequency after outputting a lock up release signal if the rotational frequency of an engine is upward tendency when a shift down signal is generated in the lock up state. CONSTITUTION:The above control device is adapted to intermittently operate a lock up mechanism A provided on a torque converter by controlling lock up electromagnetic means B, and operate a geared speed change mechanism C to change speed by controlling speed change electromagnetic means D. In this case, when a shift down signal Cp' is output from speed change control means E in the lock up state, according to an output of rotational frequency change condition detection means G, if the rotational frequency of an engine output shaft is upward tendency, a lock up release signal Cq' is output in synchronization with the signal Cp', and if it is downward tendency, the signal Cp' is output after outputting the signal Cq' by output timing adjust means F. The delay time of outputting the signal Cp' is set as time corresponding to the change rate of rotational frequency by timer means H. |
