Engine control device, and vehicle

A control device of an engine including a fuel supply system configured to supply liquefied natural gas as a fuel to the engine, comprising

• a memory to store a feedback correction value associated with each of a plurality of blocks sectioned by an engine rotational frequency and an engine load;
• and
• a processor configured to:
• calculate a feedback correction value based on a deviation between an actual fuel supplying amount and a target fuel supplying amount, and feedback-control the fuel supply system based on the feedback correction value calculated;
• acquire a methane value of the liquefied natural gas;
• modify the feedback correction value based on the methane value acquired;
• and
• calculate a difference between a reference value and the feedback correction value modified for each of the plurality of blocks;
• and determine that there is a defect of the fuel supply system when a number of blocks of which the difference exceeds a threshold value is equal to or greater than a predetermined number;
• perform a defect diagnosis of the fuel supply system to determine whether there is a defect of the fuel supply system based on the feedback correction value modified;
• and
• generate a defect notification when it is determined that there is a defect of the fuel supply system.