Control device for hybrid vehicle

A control device for a hybrid vehicle comprising:

• an internal combustion engine provided in the vehicle;
• a power generator that is driven by the internal combustion engine to generate electric power;
• a secondary battery that stores the electric power generated by the power generator;
• an electric motor that drives drive wheels of the vehicle using electric power supplied from the secondary battery;
• a clutch that connects/disconnects a transmission path that transmits power from the internal combustion engine to the drive wheels;
• a mode switching unit for switching between a first travel mode in which the clutch is released, the internal combustion engine drives the power generator to generate electric power, and the electric motor drives the drive wheels to cause the vehicle to travel, and a second travel mode in which the clutch is connected, and power of the internal combustion engine is transmitted to the drive wheels to cause the vehicle to travel;
• a rotational speed difference detection unit for detecting a difference between a rotational speed of an upstream clutch provided on a side of the internal combustion engine of the transmission path and a rotational speed of a downstream clutch provided on a side of the drive wheels of the transmission path;
• a rotational speed variable unit for performing rotational speed variable control to change the rotational speed of the upstream clutch provided on the side of the internal combustion engine when the difference between the rotational speeds detected by the rotational speed difference detection unit is held within a predetermined range for a predetermined period in the first travel mode;
• and
• a sticking determination unit for performing sticking determination of the clutch based on the difference between the rotational speeds in the rotational speed variable control.