CONTROL METHOD FOR HYBRID VEHICLE AND CONTROL DEVICE FOR HYBRID VEHICLE

A control method for a hybrid vehicle configured to switch between stoichiometric combustion and lean combustion in which the target air fuel ratio is set to be leaner than the theoretical air fuel ratio is provided. The control method for the hybrid vehicle includes when the combustion mode is switched from the lean combustion to the stoichiometric combustion, stopping a fuel supply to the internal combustion engine; decreasing an intake air amount of the internal combustion engine during the stop; setting the target air fuel ratio of the internal combustion engine to the theoretical air fuel ratio, or the air fuel ratio richer than the theoretical air fuel ratio, in a state in which the intake air amount of the internal combustion engine is decreased; and restarting the internal combustion engine.