| 摘要 |
PURPOSE:To restrain a speed change shock by conducting a learning control of a line pressure so that a speed change time may approach a target value at a range in which a happening such as a momentary rise and sudden decrease of a turbine revolution number and a sudden decrease of a torque at the time of the transition of speed change does not occur. CONSTITUTION:A line pressure learning correcting means 81 conducts a learning correction of a line pressure regulated by means of a line pressure regulating means 77 so that the speed change time of an automatic transmission detected by means of a speed change time detecting means 80 may become a target value. Also, when a happening such as a momentary rise and a sudden decrease of an automatic transmission input side revolution number, and a sudden decrease of a drive torque is detected by means of an abnormal time detecting means 82, a line pressure correcting means 83 in preference to the line pressure learning correcting means 81 corrects the line pressure so that the above happenings may not occur. Thus, an occurrence of a speed change shock is effectively restrained and also a slip of a friction element can be adequately restrained. |
