A RECIPROCATING ENGINE

A reciprocating internal combustion engine characterized in that it comprises a cylinder-alternator assembly connected with a reservoir containing any liquid or combined oil with a gasoline content comprised between 10% and 30% of the total content of the mixture housed in the reservoir and a magnetohydrodynamic exchanger configured that the exhaust gases from the cylinder-alternator assembly enter an external tube of the exchanger forming a turbulent helical flow in the opposite direction to the turbulent helical flow of the preprocessed gases circulating in an internal tube of the exchanger, processing a preprocessed gas obtained in the tank before its admission into the cylinder-alternator assembly.