Motorised hybrid system comprising a combination of two complementary engine cycles

The invention relates to a hybrid motorized system, comprising in combination two complementary engine cycles, one forming an internal combustion engine (A), the other forming an engine called external combustion engine (B) with pistons (p4, p5, p6) driven by the expansion of an active fluid, where - the distribution device of the external combustion engine (B) is formed: by a first rotating perforated tube (20) configured in such a manner as to ensure the admission of the active fluid into the cylinders (c4, c5, c6) of said engine, and by a second rotating perforated tube (21) configured in such a manner as to ensure the exhaust of said fluid out of said cylinders, or by a spool (26) configured in such a manner as to ensure the admission and exhaust of the active fluid in the cylinders (c4, c5, c6) of said engine, - a heat exchanger (C) is disposed upstream of the external combustion engine (B), which heat exchanger is traversed on the one hand by the combustion gases evacuated from the internal combustion engine (A) and on the other hand by the active fluid intended to drive the pistons (p4, p5, p6) of said external combustion engine (B), said heat exchanger being configured in such a manner that said combustion gases heat and pressurize said active fluid.