Patent ID: 7794357
Filing Date: 2010-09-14
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A control device for a power train including a differential mechanism that has a first rotating element linked to a first rotary electric machine, a second rotating element linked to a second rotary electric machine and a third rotating element linked to an internal combustion engine, a switching mechanism that, in the differential mechanism, switches between a first state that permits relative rotation of the first rotating element, the second rotating element and the third rotating element, and a second state that prohibits relative rotation of the first rotating element, the second rotating element and the third rotating element and a transmission mechanism that is connected to the differential mechanism and that transmits torque input from the differential mechanism to a wheel, the control device comprising: a power train control portion that controls the power train so as to steplessly change a speed change ratio during the first state; a transmission mechanism control portion that controls the transmission mechanism so as to stepwise change the speed change ratio during the second state; a first control portion that controls the switching mechanism so as to switch between the first state and the second state; and a second control portion that controls at least one of the first rotary electric machine and the second rotary electric machine to compensates for an amount of reduction in torque transmitted to the wheel when switching between the first state and the second state is performed, wherein the power train control portion controls the power train so as to cause the torque transmitted to the wheel following the switching between the first state and the second state to be smaller when a compensation amount of the torque transmitted to the wheel is restricted than when the compensation amount is not restricted.