Patent ID: 7749131

Claim:
A vehicular drive system comprising: an engine; an electric differential portion in which a differential state of i) a rotation speed of an input shaft of the electric differential portion which is connected to the engine and ii) a rotation speed of an output shaft of the electric differential portion is controlled by controlling an operating state of an electric motor that is connected to a rotating element of a differential mechanism in a manner such that power can be transmitted to the differential mechanism; a differential state switching device formed of an apply element for selectively switching the differential mechanism between a differential state in which differential operation is possible and a locked state in which differential operation is not possible; a differential state switch controlling apparatus which switches the differential state based on a switching line graph which is set in advance according to a running state of the vehicle and demarcates a differential region in which the differential operation of the differential mechanism is possible and a locked region in which the differential operation of the differential mechanism is not possible; and a standby control apparatus which controls a switch to standby control between the differential state and the locked state based on a switching line graph that has a standby region between the differential region and the locked region, which places the differential state switching device in a state just before the differential state switching device starts to apply.