Patent ID: 7793493

Claim:
A turbocharged combined internal combustion and steam engine of multiple cylinders comprising of combustion and heat recovery steam cylinders wherein a reciprocating piston in each cylinder drive a common crankshaft and a means that allows the said combustion cylinders to operate in a four stroke cycle mode of operation and the said heat recovery steam cylinders to operate in a two stroke mode of operation, with predetermined lift and predetermined duration of opening of the intake valves, wherein the exhaust gas from the combustion cylinders, held in a holding chamber, is forced by a compressor into the heat recovery steam cylinders as the intake valve opens for a predetermined period of time and as the valve closes electronically controlled injectors spray pressurized heated water, from the injection water holding tank, into the heat recovery steam cylinders, the said water spontaneously turns to steam driving the said piston down wherein the exhaust valve opens at the bottom of the stroke and the exhaust gas and steam released the heat recovery cylinders herein to drive a turbine which in turn drives the said compressor that compressed the exhaust gas going into the heat recovery cylinder and a compressor that boosts the pressure of the intake air.