Abstract: A turbocompound engine has an internal combustion engine with a first recuperation turbine positioned on an exhaust line of the engine. The first turbine provides mechanical power to the engine. Heat from an exhaust line of the first turbine is transferred to a heat recovery system. A second turbine is operated by the heat within the heat recovery system and provides mechanical power to the engine.

Abstract: Turbocompound engine apparatus comprising: an internal combustion engine; a first recuperation turbine (2, 2?) positioned on the exhaust line (1) of the exhaust gases from said engine suitable to provide mechanical power to said engine; a heat recovery system comprising a closed circuit (6) comprising a working fluid, a heat exchanger (8) positioned on the exhaust line downstream of said first recuperation turbine suitable to allow the transfer of heat from the exhaust gases to said working fluid, a secondary turbine (9) suitable to be operated by said working fluid; wherein said secondary turbine is suitable to provide mechanical power to said engine. Method for recovering the heat of exhaust gases in a system as defined above.