Patent ID: 8463513

Claim:
A transmission control apparatus for an automatic transmission to change a shift position automatically, the transmission control apparatus comprising: a cornering-state judging device configured to judge whether a vehicle has transitioned to a cornering state from a normal running state; a modified shift-up table generator configured to generate a modified shift-up table when the vehicle is judged to have transitioned to the cornering state, the modified shift-up table making a shift-up more difficult to occur than a reference shift-up table does; a gear-shift controller configured to perform gear-shift control by using the reference shift-up table during the normal running state, and configured to suppress a gear shift by using the modified shift-up table instead of the reference shift-up table when the vehicle is judged to have transitioned to the cornering state; and a cornering-state judgment map in which a running state of the vehicle is divided into an acceleration range, a cruise range, a deceleration range, and a throttle-off range by using a throttle opening and a vehicle speed as parameters, wherein the cornering-state judging device is configured to judge based on information on the throttle opening and the vehicle speed that the vehicle has transitioned to the cornering state from the normal running state, when the running state of the vehicle enters the cruise range from the acceleration range or when the running state of the vehicle enters the cruise range from the deceleration range.