Rotary engine and method of combusting fuel

A rotary engine comprising:

• a rotor sealingly received within an internal cavity of a housing to define a plurality of combustion chambers having a variable volume;
• an intake port and an exhaust port defined through the housing and in fluid communication with each of the combustion chambers in a successive manner;
• a pilot subchamber stationary relative to the housing and in fluid communication with each of the combustion chambers in a successive manner, a volume of the pilot subchamber being at least 0.5% and at most 3.5% of a displacement volume defined as a difference between maximum and minimum volumes of one of the combustion chambers;
• a main fuel injector in direct fluid communication with each of the combustion chambers in a successive manner, the main fuel injector being located downstream of the intake port and upstream of the pilot subchamber with respect to a direction of rotation of the rotor;
• a pilot fuel injector in fluid communication with the pilot subchamber;
• an ignition source in heat exchange relationship with the pilot subchamber;
• and
• an interburner fuel injector in direct fluid communication with each of the combustion chambers in a successive manner, the interburner fuel injector being located downstream of the pilot subchamber and upstream of the exhaust port.