Patent ID: 8406967

Claim:
A control apparatus for an automatic transmission system including a serial arrangement of a stepwise variable automatic transmission mechanism capable of selecting an optional speed from a plurality of speeds, and a continuously variable automatic transmission mechanism capable of continuously varying a transmission ratio thereof, the control apparatus being disposed in the automatic transmission system and performing a shift control of the continuously variable automatic transmission mechanism in accordance with variation in a transmission ratio of the stepwise variable automatic transmission mechanism, the control apparatus comprising: a control section configured to execute shift control of the continuously variable automatic transmission mechanism and the stepwise variable automatic transmission mechanism, wherein the control section is further configured to execute a retardation processing which retards one of the continuously variable automatic transmission mechanism and the stepwise variable automatic transmission mechanism which has a smaller response delay of an actual transmission ratio from a target transmission ratio than that of the other of the continuously variable automatic transmission mechanism and the stepwise variable automatic transmission mechanism so as to absorb a difference in response between the continuously variable automatic transmission mechanism and the stepwise variable automatic transmission mechanism upon shift control of the one of the continuously variable automatic transmission mechanism and the stepwise variable automatic transmission mechanism.