Control System for an Engine Assembly

A method for controlling an engine assembly, the engine assembly comprising:

• an engine configured to convert energy in a fuel into primary output energy and secondary output energy wherein the primary output energy consists solely of primary output kinetic energy in the form of a rotating crankshaft for onward transmission to at least one of a gearbox and a load and the secondary output energy comprises secondary output kinetic energy and secondary output thermal energy;
• a recovery device configured to convert the secondary output energy to potential energy;
• and
• a transducer suitable either for converting the potential energy to tertiary energy for conversion by the engine into primary output energy or for converting the potential energy directly to primary output energy;
• the method comprising:
• implementing an equivalent consumption minimization strategy in order to control overall consumption of fuel by continuously optimizing a proportion of the primary output energy derived from the energy in the fuel and a proportion of the primary output energy derived from the potential energy.