INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: engine has cylinder 1 with inlet valve 3, outlet valve 4, outlet manifold 5 connected with outlet passageway 4, and three-stage heat exchanger mounted in outlet manifold 5. The second stage is cooling jacket 7 of cylinder 1. The third stage is made up as water over- heater 8 made in block with outlet manifold 5 of engine 2. The head of the cylinder is provided at least with one inlet valve 10 and one outlet valve 11 and stop valves 15 and 16, the stop valves being mounted on chambers 13 and 14 positioned symmetrically to combustion chamber 12. The engine has a system for supplying water to the heat exchanger. All engine system is heat- insulated from the ambient. EFFECT: enhanced efficiency. 2 dwg