The invention concerns an engine method with suction-compression chamber (1) and/or expansion-exhaust chamber (4) operating by means of reciprocating pistons with an independent and twinned compression chamber (2) - the three chambers being separated with a device controlling the stroke causing, over a long period of engine rotation, said piston (15) to stop at the upper dead centre which in that position separates the combustion chamber and the expansion-exhaust chamber, also comprising a high-pressure compressed air chamber (23) and additional systems for recuperating ambient thermal energy and additional heating, capable of operating in mono-energy air plus supplementary compressed air or in bi-energy, or with conventional fuel in internal or external combustion, or by injection of a dose of compressed air thereby producing three operating modes depending on the type of use. The invention is useful for all types of engine methods.
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