CONTROL DEVICE OF AUTOMATIC TRANSMISSION, CONTROL METHOD, PROGRAM FOR REALIZING THE METHOD AND RECORDING MEDIUM RECORDING THE PROGRAM

摘要

PROBLEM TO BE SOLVED: To conduct transmission quickly by providing a structure for releasing one of two engaging elements forming a gear stage before transmission and imparting an engaging force to only the other one and releasing one of the engaging elements. SOLUTION: In the case of downshift (S100: yes) from a fifth-speed gear stage formed by engaging a B3 brake with a C2 clutch to a second-speed gear stage formed by engaging a C1 clutch with a B1 brake or from a sixth-speed gear stage formed by engaging the B1 brake with the C2 clutch to a third-speed gear stage formed by engaging the C1 clutch with the B3 brake, an ECU (Electric Control Unit) executes a program including a step S104 for bringing a friction engaging element different from the C2 clutch, in other words, the B3 brake or the B1 brake into a released state and a step (S106) for lowering the engaging pressure of the C2 clutch to a basic value of target engaging pressure. COPYRIGHT: (C)2009,JPO&INPIT