| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a shift controller for an automatic transmission capable of performing prompt shift and avoiding torque fluctuation at an intermediate gear stage, by engaging a first shift engagement element after releasing first and second shift release elements and by forming a low speed stage by engaging a second shift engagement element while performing feedback control of torque capacity of the second shift release element, during a downshift. <P>SOLUTION: A shift control means performs control to form three forward speed stages by engaging a clutch C-3 while preforming feedback control of torque capacity of a clutch C-2, after releasing a brake B-1 and the clutch C-2 and then engaging a clutch C-1. As a result of releasing the brake B-1 and the clutch C-2 prior to engagement of the clutch C-1, time for shifting can be shortened, and torque fluctuation can be reduced to avoid occurrence of an uncomfortable shift shock. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
