| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control device for an automatic transmission capable of preventing generation of gear shift shock due to torque down control in a learning correction fluctuation zone, and meeting demand for stabilization of gear shifting quality by securing consistency of start timing of torque down control in a learning correction stable zone and start timing of inertia phase. <P>SOLUTION: This control device for the automatic transmission is provided with a gear shift pressure learning correction control means (Fig.3) determining and storing correction quantity of engagement command pressure to a friction element relating to gear shift based on a deviation state between actual physical quantity and target physical quantity, a gear shift torque down control means starting output of command temporally dropping torque of the engine 1 when inertia phase start estimation timing predetermined by time management comes during gear shifting, and a torque down change-over control means (Fig.4) prohibiting gear shift torque down control until it is determined that gear shift pressure learning correction is converging and executing gear shift torque down control when it is determined that gear shift pressure learning correction is converging. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
