| 摘要 |
<p>PROBLEM TO BE SOLVED: To execute shift control of an automatic transmission without causing the worsening of a shift shock, delay of a shift and wrong judgment, by judging the shift based on a basic throttle opening, and setting an engaging pressure of a friction engaging device based on the throttle present opening. SOLUTION: A throttle present opening is controlled by electrically controlling a servo motor 16 driving a throttle valve 14. Shift judgment is performed based on a basic throttle opening TTA, and control of an oil pressure is performed based on the basic throttle opening TTA. That is, a response delay of the throttle present opening relating to the basic throttle opening TTA can be retained to a degree of inevitable delay with respect to a mechanism, so as to apply the basic throttle opening TTA to shift judgment and oil pressure control. In this way, a delay of shift judgment and surplus/deficiency of pressure oil can be effectively prevented, as a result, good shift control can be performed without a slow feeling based on a shift delay and a wrong shift or a shock due to improper oil pressure.</p> |
