Patent ID: 7481737

Claim:
A control apparatus for a vehicular drive system including: (i) a first transmission portion operable as an electrically controlled continuously variable transmission and having (i-1) a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and (i-2) a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle; and (ii) a second transmission portion constituting a part of the power transmitting path, said control apparatus comprising: a differential-state switching device provided in the differential mechanism and operable to selectively place the first transmission portion in a continuously-variable shifting state in which the first transmission portion can be operated as the electrically controlled continuously variable transmission, and in a non-continuously-variable shifting state in which the first transmission portion is not operated as the electrically controlled continuously variable transmission; and a transmission controller operable to change a speed ratio of the second transmission portion, concurrently with switching of the first transmission portion between the continuously-variable shifting state and the non-continuously-variable shifting state.