Patent ID: 8170736

Claim:
A control device for a hybrid vehicle which uses both of an internal combustion engine and a first rotating electrical machine for travel of the vehicle, comprising: a target rotation speed determination unit which determines a target rotation speed of said internal combustion engine; a filtering process unit which receives an output of said target rotation speed determination unit, changes the received output such that said target rotation speed changes gently, and outputs the changed output; a property switching control unit which switches properties of said filtering process unit in accordance with a vehicle state; and a first torque value calculation unit which calculates target torque of said first rotating electrical machine in accordance with a difference between the output of said filtering process unit and an actual rotation speed of said internal combustion engine, on a condition that said vehicle state is a traveling state, when the vehicle is at rest with an accelerator pedal not depressed and a power storage device requires charging, said target rotation speed determination unit determining requested power output from said internal combustion engine based on a state of charge of said power storage device, and calculating a first target rotation speed suitable for outputting the requested power from said internal combustion engine, and when said vehicle state is switched from said traveling state to a neutral state, said target rotation speed determination unit outputting a second target rotation speed suitable for no-load self-sustaining rotation of said internal combustion engine, and said property switching control unit switching the properties of said filtering process unit in accordance with a shift switch instruction to switch said vehicle state from said traveling state to said neutral state; wherein said units are incorporated into said control device.