Patent ID: 8151553
Filing Date: 2012-04-10
Classification: F02M,Y02T

Abstract:
1. A method for operating an internal-combustion engine system, 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 at least one cylinder, a cylinder chamber within said at least one cylinder and a piston that can reciprocate in said at least one cylinder, said engine receiving recycled combustion gas, oxygen and fuel and exhausting hot combustion gas containing carbon dioxide and water vapor, (b) providing a gas-flow-splitting means for a controllable splitting of flow of said hot combustion gas into two flows: a flow of recycled combustion gas and a flow of excess combustion gas, (c) providing a gas-flow-controlling means for controlling said splitting of said hot combustion gas and for controlling the pressure of said recycled combustion gas, (d) providing a gas-exhaust means for connecting said engine to said gas-splitting means and for discharging hot combustion gas from said engine into said gas-splitting means, (e) providing a gas-cooling means for receiving, cooling and discharge of said recycled combustion gas, (f) providing a gas-intake means for connecting said engine to said gas-cooling means and for receiving cooled recycled combustion gas from said gas-cooling means into said engine, (g) providing a source of oxygen and an oxygen-delivery means for adding oxygen to said recycled combustion gas, (h) providing a source of fuel and a fuel-delivery means for adding fuel to said recycled combustion gas, (i) providing a gas-condensation means for receiving said excess combustion gas and for cooling and condensing water vapor and carbon-dioxide gas contained in said excess combustion gas, (j) providing a water-storage means for collecting and storing water condensed in said gas-condensation means, (k) providing a carbon-dioxide-storage means for collecting and storing liquid carbon dioxide condensed in said gas-condensation means, (l) providing a control means for controlling the operation of said internal-combustion engine system in response to operator's demands and in accordance with a control program incorporated in said control means, (m) operating said engine in a gas-recycling mode by repeatedly performing an engine cycle that includes the steps of: (n) receiving said excess combustion gas from said gas-flow-splitting means into said gas-condensation means, (o) condensing water vapor contained in said excess combustion gas and collecting water in said water-storage means, (p) condensing carbon-dioxide gas contained in said excess combustion gas and collecting liquid carbon dioxide in said carbon-dioxide-storage means, (q) using said control means for control of operation of said internal-combustion engine system, and (r) periodically removing water collected in said water-storage means and carbon dioxide collected in said liquid-carbon-dioxide-storage means, whereby said engine operates without receiving any air from outside atmosphere and without discharging any gas into outside atmosphere, and whereby no greenhouse gas and no other harmful pollutants are released into outside atmosphere during said engine operation.