Patent ID: 7967722
Filing Date: 2011-06-28
Classification: B60K,B60L,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
1. A control apparatus for a vehicular drive system including a continuously-variable transmission portion operable as an electrically controlled continuously variable transmission, and a step-variable transmission portion, said continuously variable transmission portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, a second electric motor connected to a power transmitting path between the power transmitting member and a drive wheel of a vehicle, and a differential limiting device provided in said differential mechanism and operable to limit a differential function of said differential mechanism, for limiting an operation of said continuously-variable transmission portion as said electrically controlled continuously variable transmission, said step-variable transmission portion constituting a part of said power transmitting path and functioning as a step-variable transmission operable to perform a clutch-to-clutch shifting action by a releasing action of a coupling device and an engaging action of another coupling device, said control apparatus comprising: differential-state switching means for releasing the limitation of the operation of said continuously-variable transmission portion as said electrically controlled continuously variable transmission, while said clutch-to-clutch shifting action of said step-variable transmission portion is in a tie-up state.