| abstract |
An object of the present invention is to provide a control device for a hybrid vehicle that improves the fuel efficiency by increasing the thermal efficiency of an engine during catalyst warm-up in a one-motor hybrid vehicle. During catalyst warm-up control, a required driving force control unit 84 changes the output of an electric motor MG and shifts an automatic transmission 18 so as to satisfy a change in a driver's required driving force. Therefore, the catalyst warm-up control can be appropriately performed while the torque of the engine 12 is kept substantially constant during traveling. Further, during the catalyst warm-up control, the engine output Pe is increased so as not to exceed the exhaust purification capacity of the catalyst device 58 to warm up the catalyst device 58, so that the thermal efficiency of the engine 12 has a low engine output Pe. Higher than As a result, in the one-motor hybrid vehicle, the thermal efficiency of the engine 12 when the catalyst is warmed up can be increased to improve fuel efficiency. [Selection] Figure 3 |