Patent ID: 7416512

Claim:
A shift control apparatus for a continuously-variable transmission, comprising: an operating condition sensing section configured to sense an operating condition of a vehicle, the operating condition including a vehicle speed and an accelerator operation quantity; a normal-time speed ratio determining section configured to determine a normal-time target speed ratio of the continuously-variable transmission in accordance with the vehicle speed and the accelerator operation quantity sensed by the operating condition sensing section; a normal-time control section configured to control a speed ratio of the continuously-variable transmission in accordance with the normal-time target speed ratio determined by the normal-time speed ratio determining section; a kickdown-acceleration request determining section configured to determine whether or not a kickdown acceleration request is present, in accordance with the accelerator operation quantity sensed by the operating condition sensing section; a kickdown-acceleration-time control section configured to set a kickdown-acceleration-time target speed ratio in accordance with the vehicle speed and the accelerator operation quantity sensed by the operating condition sensing section, to cause an output rotational speed of the continuously-variable transmission to increase substantially linearly with an increase of input rotational speed of the continuously-variable transmission, when the kickdown-acceleration request determining section determines that the kickdown acceleration request is present, and to control the speed ratio in accordance with the kickdown-acceleration-time target speed ratio instead of the normal-time target speed ratio; and an accelerator-operation-quantity variation-rate limiting section configured to calculate a corrected accelerator operation quantity by imposing a limitation on a variation rate of the accelerator operation quantity sensed by the operating condition sensing section, when a predetermined variation of the sensed accelerator operation quantity occurs during the speed ratio control of the kickdown-acceleration-time control section, and to output the corrected accelerator operation quantity to the kickdown-acceleration-time control section in order to set the kickdown-acceleration-time target speed ratio.