Patent ID: 8033272

Claim:
A method of controlling an engine system having an internal combustion engine, a supercharger arranged in an intake air passage of said internal combustion engine and a motor capable of driving said supercharger, the method comprising: driving said motor to operate said supercharger to boost airflow inducted into said internal combustion engine when said internal combustion engine is in operation; sensing at least one of an intake air temperature via an intake temperature sensor disposed in an intake air passage through which air is inducted into said internal combustion engine and an engine temperature via an engine temperature sensor coupled to the internal combustion engine; determining that a temperature parameter related to a temperature of said supercharger is below a predetermined value based on the at least one of the intake air temperature and the engine temperature; driving said motor to detect a state of said supercharger when said internal combustion engine is stopped when the temperature parameter related to a temperature of said supercharger is below a predetermined value; and indicating the detected state of said supercharger.