Patent ID: 8738253

Claim:
A control apparatus for an automatic transmission that is connected to an engine, and that can be manually shifted in response to an operation by a driver, comprising: a detecting device that detects a downshift operation by the driver; a shift determining device that makes a shift determination corresponding to the detected downshift operation; an output device that outputs a shift output based on the shift determination to the automatic transmission; an overspeed determining device which, when there is a shift determination that is different from the shift output as a result of the downshift operation being detected successively, determines whether the engine will overspeed as a result of a downshift based on the different shift determination; and a cancelling device that cancels a shift determination that is determined to cause the engine to overspeed, wherein when there are a plurality of the different shift determinations, the overspeed determining device continues to determine for each of the different shift determinations whether the engine will overspeed while those different shift determinations are different from the shift output, and the overspeed determining device determines whether the engine will overspeed based on a vehicle speed and an accelerator operation amount in such a manner that even when the vehicle speed is the same, a probability for it to be determined that the engine will overspeed is reduced as the accelerator operation amount becomes lower.