Patent ID: 6968678

Claim:
An internal combustion engine system, comprising: a) an internal combustion engine having a compression ratio of at least 11:1; b) an exhaust line operatively attached to said engine and fluidly moving exhaust gases from said engine; c) an air influent line and a fuel influent line fluidly coupled by a means for mixing air and fuel flowing through said air and fuel influent lines, and an inert gas influent line, said air, fuel, and inert gas influent lines connected to sources of air, fuel and inert gas, respectively, and feeding a composite influent line operatively attached to said engine and fluidly moving an air/inert gas/fuel mixture into said engine, for combustion therein; d) an oxygen sensor disposed in said exhaust line and sensing oxygen in said exhaust gases; e) a controller receiving a signal from said oxygen sensor, said controller coupled to a means for adjusting an air/fuel mixture ratio being supplied to said engine, to maintain said air/fuel mixture ratio near a stoichiometric value; and f) a first catalytic processing system fluidly coupled to said exhaust gas line, so that said exhaust gases flow therethrough, said first catalytic processing system comprising catalysts for lowering NOx compounds, carbon monoxide, and hydrocarbons; g) a turbine fluidly connected to said exhaust gas line and driven by said exhaust gases; h) a compressor operatively coupled to and driven by said turbine, said air and inert gas influent lines routed through said compressor and the respective flowstreams compressed therein; i) a second catalytic processing system fluidly coupled to said exhaust line downstream of said first catalytic processing system; and j) an injection line fluidly coupled to said exhaust line intermediate said first and second catalytic processing systems.