Patent ID: 8897942

Claim:
A control device for a hybrid vehicle that includes an internal combustion engine, a driving electric motor, a driving device that drives the driving electric motor, a rechargeable electrical storage device and a voltage step-up device that is provided between the driving device and the electrical storage device and that steps up an input voltage of the driving device to a voltage of the electrical storage device or above, the control device comprising: an evaluation unit that determines whether it is possible to reduce a carbon dioxide emissions for a predetermined travel route by increasing the voltage of the electrical storage device; and a state-of-charge control unit that controls a state of charge of the electrical storage device on the basis of a result determined by the evaluation unit, wherein: when the evaluation unit determines that it is possible to reduce the carbon dioxide emissions, the state-of-charge control unit controls the state of charge so as to increase a state quantity that indicates the state of charge at a start of the travel route; and the evaluation unit includes: a first computing unit that estimates a first emission amount indicating the carbon dioxide emissions if the hybrid vehicle travels the travel route without increasing the state quantity; a second computing unit that estimates a second emission amount indicating the carbon dioxide emissions if the hybrid vehicle travels the travel route by increasing the state quantity at the start of the travel route; and a determining unit that determines that it is possible to reduce the carbon dioxide emissions when the second emission amount is smaller than the first emission amount.