Controller for hybrid electric vehicle, control method for hybrid electric vehicle, and memory medium

A control method for a hybrid electric vehicle, the control method comprising:

• transmitting power of an internal combustion engine and power of a multiphase rotating electric machine to a driven wheel in the hybrid electric vehicle in which the control method is employed;
• reducing torque of the multiphase rotating electric machine when a magnitude of current in a particular phase of the multiphase rotating electric machine remains greater than or equal to a given value;
• executing a deactivating process that deactivates combustion control in a deactivated cylinder that is one or more of cylinders of the internal combustion engine and continues combustion control in the remaining ones of the cylinders;
• cyclically fluctuating the torque of the multiphase rotating electric machine in a cycle that is an integral multiple of a compression top dead center occurrence cycle when the deactivating process is being executed, the compression top dead center occurrence cycle being a cycle during which a compression top dead center occurs in the internal combustion engine;
• and
• prohibiting execution of the deactivating process in a predetermined situation in which a rotation speed of a rotary shaft of the multiphase rotating electric machine is less than or equal to a given speed.

A non-transitory computer-readable memory medium that stores a program for causing a processor to execute a control process for a hybrid electric vehicle, the control process comprising:

• transmitting power of an internal combustion engine and power of a multiphase rotating electric machine to a driven wheel in the hybrid electric vehicle in which the control process is employed;
• reducing torque of the multiphase rotating electric machine when a magnitude of current in a particular phase of the multiphase rotating electric machine remains greater than or equal to a given value;
• executing a deactivating process that deactivates combustion control in a deactivated cylinder that is one or more of cylinders of the internal combustion engine and continues combustion control in the remaining ones of the cylinders;
• cyclically fluctuating the torque of the multiphase rotating electric machine in a cycle that is an integral multiple of a compression top dead center occurrence cycle when the deactivating process is being executed, the compression top dead center occurrence cycle being a cycle during which a compression top dead center occurs in the internal combustion engine;
• and
• prohibiting execution of the deactivating process in a predetermined situation in which a rotation speed of a rotary shaft of the multiphase rotating electric machine is less than or equal to a given speed.