Internal combustion engine and operating method of same

An internal combustion engine of a type that suctions atmospheric air as an oxidizing agent and uses hydrocarbons as a fuel, the engine comprising:

• a first regenerative Brayton cycle of air compressions with intermediate cooling and nitrogen expansions with reheating by mixing a part of the nitrogen, comprising a MIEC membrane that separates O2 from the compressed air, such that the suctioned air current is free from N2, and a depleted air from a rejection from the MIEC membrane is sent directly to an exhaust gas current, preventing the depleted air from participating in a subsequent combustion, in which part of the air compressions are performed in at least one first cylinder of the engine;
• a second Brayton cycle with compression with intermediate cooling, combined in a binary manner with the first Brayton cycle and nested with a cycle selected from an Otto cycle and a diesel cycle performed by oxy-combustion in at least one second cylinder of the engine,
• wherein the second Brayton cycle transmits mechanical energy, by a coupling of the at least one first cylinder with the at least one second cylinder through a crankshaft, and wherein the second Brayton cycle transmits thermal energy from exhaust gases to the first Brayton cycle;
• wherein the first Brayton cycle provides compressed O2 from the MIEC membrane to the second Brayton cycle;
• whereby an NOx emission into the atmosphere is prevented by a separation of N2 in the MIEC membrane.