Control method and control device for hybrid vehicle

A control device for a hybrid vehicle including a first drive source, a second drive source, a first clutch, and a second clutch, wherein:

• the first drive source includes a first motor generator;
• the second drive source includes a second motor generator;
• the first clutch performs connection and disconnection between the first drive source and a first drive wheel;
• the second clutch performs connection and disconnection between the second drive source and the first drive wheel;
• the hybrid vehicle is structured to switch between a neutral mode and a parallel mode during vehicle traveling;
• and both of the first drive source and the second drive source are disconnected from the first drive wheel in the neutral mode, and are connected to the first drive wheel in the parallel mode, the control device comprising:
• a section configured to implement at least one of a first switching control and a second switching control, wherein:
• the first switching control includes, upon switching from the neutral mode to the parallel mode, implementing a synchronization control on rotational speeds before and after the first clutch by control on the first motor generator and a synchronization control on rotational speeds before and after the second clutch by control on the second motor generator, concurrently during at least a partial period;
• and
• the second switching control includes, upon switching from the parallel mode to the neutral mode, implementing a control to cause a transmitted torque of the first clutch to approach zero by control on the first motor generator and a control to cause a transmitted torque of the second clutch to approach zero by control on the second motor generator, concurrently during at least a partial period.