Patent ID: 7318787
Filing Date: 2008-01-15
Classification: B60K,B60W,Y02T,Y10S,Y10T

Abstract:
1. A control device for a vehicular drive system including (a) a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, (b) a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle, and (c) a differential-state switching device operable to place said differential mechanism selectively in one of a differential state in which said differential mechanism is operable to perform a differential function and a step-variable shifting state in which said differential mechanism is not operable to perform the differential function, said control device comprising: a switching control portion operable to control said differential-state switching device to place said differential mechanism selectively in one of said differential and step-variable shifting states; and a power-source torque-change restriction control portion operable to restrict a change of an output torque of said engine when said differential mechanism is switched by said differential-state switching device between said differential state and said locked state under the control of said switching control portion.