Patent ID: 7549946
Filing Date: 2009-06-23
Classification: B60W,F16H,Y10T

Abstract:
1. A shift control apparatus that executes a shift control of an automatic transmission that changes a speed of a rotation transferred from a power source to an input member and outputs the rotation to a drive wheel, wherein in response to a second downshift determination made during a first downshift which engages a first friction coupling device, the shift control apparatus performs a second downshift operation which disengages the first friction coupling device, and engages a second friction coupling device, the shift control apparatus comprising: a multiple shift execution unit that starts the second downshift operation in response to the second downshift determination; and a torque reduction control execution unit that executes a torque reduction control, after starting the second downshift operation, for reducing a torque of the power source when a rotational speed of the input member is increased to be equal to or higher than a predetermined first determination speed that is lower than a synchronous rotational speed determined in accordance with a shift ratio of a gear stage after the second downshift.