SHIFT CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To restrain the deterioration of control accuracy by preventing an integral value of feedback control from being illicitly accumulated when starting a sudden shift. SOLUTION: This shift control device is provided with an integral means for arithmetically operating the arrival transmission ratio and the target transmission ratio of a continuously variable transmission according to a driving state and integrating a deviation between the actual transmission ratio and the target transmission ration, a feedback control means for controlling a command value ASTP to a step motor 50 so that the actual transmission ratio coincides with the target transmission ratio is provided with a means for judging a start of a sudden shift on the basis of a deviation between the arrival transmission ratio and the target transmission ratio or the actual transmission ration, and when the start of the suddent shift is judged, a value of the integral means of feedback control is held for a preset time.