Internal combustion engine device, hybrid vehicle including the same, and fuel property determination method

摘要

PPROBLEM TO BE SOLVED: To properly and early determine the property of fuel to be supplied to an internal combustion engine at the start of an engine. PSOLUTION: After fuel injection to an engine or the ignition of the engine is started in response to a request to start the engine (S150), an estimated output power Peest of the engine is calculated as a sum of a power used for the rise of the revolving speed Ne of the engine per time dt and a power generated by a motor per the time dt (S170), and when the estimated output power Peest becomes larger than a predetermined power Pref during the rise of the revolving speed Ne of the engine, it is determined that fuel to be supplied to the engine is light oil (S180, S200), and when the estimated output power Peest is equal to or less than the predetermined power Pref continuously during the rise of the revolving speed Ne of the engine, it is determined that fuel to be supplied to the engine is heavy oil (S180, S190). PCOPYRIGHT: (C)2010,JPO&INPIT