Patent ID: 6761664
Filing Date: 2004-07-13
Classification: B60W,F16H,Y10T

Abstract:
A shift control device for an automatic transmission of a vehicle, comprising:a first downshift control portion that executes a first downshift, while performing a torque down of an input torque to the automatic transmission so as to suppress a shift shock; a second downshift control portion that executes a second downshift from a gear position reached in the first downshift; a learning control portion that performs a learning control for stabilizing the downshift operation when the second downshift is executed by the second downshift control portion; a multiple downshift determination portion that determines whether or not the current downshift is a multiple downshift in which the second downshift is started before the first downshift is completed; a learning interference determination portion that determines whether or not the torque down during the first downshift is in a condition of interfering with the learning performed by the learning control portion when the multiple downshift determination portion determines that the current downshift is the multiple downshift; and a learning prohibition portion that prohibits the learning performed by the learning control portion if the learning interference determination portion determines that the torque down during the first downshift is in the condition of interfering with the learning performed by the learning control portion.