Patent ID: 7958872
Filing Date: 2011-06-14
Classification: F02M,Y02T

Abstract:
1. A method for operating an internal-combustion engine, said method comprising the steps of: (a) providing an internal-combustion engine that uses recycled combustion gas and oxygen instead of air, said engine including: (b) providing a gas-cooling means for receiving, cooling and discharge of said engine combustion gas and for condensing water vapor contained in said combustion gas, (c) providing a collecting means for collecting water condensed in said gas-cooling means, (d) providing a gas-intake means for selectively connecting said engine to said gas-cooling means and for receiving cooled combustion gas from said gas-cooling means into said engine, (e) providing a means for adding water from said collecting means to said combustion gas, (f) providing a source of oxygen and an oxygen-delivery means for adding oxygen to said combustion gas, (g) providing a source of fuel and a fuel-delivery means for adding fuel to said combustion gas, (h) providing a gas-exhaust means for selectively connecting said engine to said gas-cooling means and for discharging hot combustion gas from said engine into said gas-cooling means, (i) providing a pressure-control means for controlling the pressure of said recycled combustion gas and for discharging excess combustion gas into outside atmosphere, (j) providing a control means for controlling the operation of said internal-combustion engine in response to operator's demands and in accordance with a control program incorporated in said control means, (k) operating said engine in a gas-recycling mode by repeatedly performing an engine cycle that includes the steps of (l) using said control means for control of operation of said internal-combustion engine, whereby said engine operates without receiving air from outside atmosphere, whereby said combustible mixture contains no nitrogen, whereby no nitrogen oxides are produced in said engine, whereby harmful exhaust emissions are recycled back into said engine and burned there, whereby water evaporation in said engine reduces said engine fuel consumption, whereby recycling water produced in combustion eliminates the need for additional source of water, whereby there is no need for an on-board tank of water, and whereby there are substantial improvements in said engine fuel economy and exhaust emissions.