Patent ID: 7670262

Claim:
An automatic transmission control device that determines whether a vehicle is rapidly decelerating based on a rate of deceleration of the vehicle, comprising: a deceleration rate detection device that detects the rate of deceleration of the vehicle; a rapid deceleration determination device that determines that the vehicle is rapidly decelerating if the detected rate of deceleration is equal to or exceeds a predetermined threshold; an accelerator operation detection device that detects presence or absence of an accelerator operation for the vehicle; and a threshold setting device that sets a first threshold if it is determined that the vehicle is in a power-on state, in which the accelerator operation detection device has detected the accelerator operation, and sets a second threshold, which is lower than the first threshold, if it is determined that the vehicle is not in the power-on state, wherein the rapid deceleration determination device determines that the vehicle is rapidly decelerating if the detected rate of deceleration detected by the deceleration rate detection device is equal to or exceeds one of the thresholds set by the threshold setting device.