Patent ID: 8560188

Claim:
A control apparatus for a vehicle automatic transmission, which performs upshift and downshift control for speed gears in accordance with a shift map including upshift and downshift lines set for each of the speed gears, the control apparatus comprising: shift mode switching means for executing, in a switching manner, an automatic shift mode of automatically performing a shift operation by determining a speed gear based on a running state of a vehicle, the speed gear being to be set, and a manual shift mode of performing a shift operation instructed by a manual operation of a driver; downshift determining means for performing a determination as to whether or not to implement an automatic downshift of the speed gear in the manual shift mode; brake detecting means for detecting an actuation of a brake; deceleration calculating means for calculating deceleration of the vehicle; vehicle speed detecting means for detecting a vehicle speed; running state estimated value calculating means for calculating a running state estimated value obtained by searching a value on a map prepared in advance based on an average value of amounts of accelerator pedal operations by the driver and on an average value of changes of the vehicle speed; and downshift vehicle speed calculating means for calculating a downshift vehicle speed by searching a vehicle speed on the shift map based on the running state estimated value and on an estimated value of a vehicle gradient, wherein the downshift determining means determines implementation of the downshift in a case where the actuation of the brake is detected by the brake detecting means, in a case where the deceleration of the vehicle, the deceleration being calculated by the deceleration calculating means, is a predetermined value or more, and in a case where a current vehicle speed detected by the vehicle speed detecting means is the downshift vehicle speed or more.