Patent ID: 7950485
Filing Date: 2011-05-31
Classification: B60K,B60W,F16H,Y02T

Abstract:
1. A control device for a hybrid vehicle which comprises an engine and a motor generator as a driving source, and which switches at least two modes: an infinite variable speed mode; and a fixed gear ratio mode, comprising: a speed change control unit which executes a speed change control that maintains a number of revolutions equal to or larger than a number of engine revolutions at a time of setting the fixed gear ratio mode, and reduces an engine torque to change to the fixed gear ratio mode, when the speed change is performed from the infinite variable speed mode to the fixed gear ratio mode in which the number of revolutions is smaller than the number of engine revolutions in the infinite variable speed mode; and a speed change determination unit which predicts a future operation state and determines whether or not to execute the speed change control based on the predicted operation state, wherein, only when the speed change determination unit determines to execute the speed change control, the speed change control unit executes the speed change control wherein, when an operation state does not become the operation state predicted by the speed change determination unit during executing the speed change control, the speed change control unit stops the execution of the speed change control, and moves an operation point of the engine on a fuel consumption optimum line and an equipower line to change to the fixed gear ratio mode.