Patent ID: 6192686
Filing Date: 2001-02-27
Classification: F02B,F02D,F02M

Abstract:
An exhaust gas recirculation system for use with an engine, said engine defining a plurality of operating parameters, having a rotatable crankshaft through which an engine speed can be defined and a plurality of cylinders being defined as a part of the engine, said exhaust gas recirculation system comprising:a flow of intake air entering a respective one of said plurality of cylinders, said intake air being pressurized to a preestablished pressure;a supply of combustible fuel entering said respective one of said plurality of cylinders;a combustion process within said respective one of said plurality of cylinders defining a flow of exhaust gas having a preestablished pressure being less than said preestablished pressure of said intake air during at least a portion of said engine operating parameters;a portion of said exhaust gas being circulated to said intake air defining a flow of exhaust gas recirculation, said flow of exhaust gas recirculation being cooled prior to being pressurized to a preestablished level and said pressurization of said flow of recirculated exhaust gas being by a positive displacement pump and being at a pressure at least equal to said preestablished pressure of said intake air;a control valve being interposed in said flow of exhaust gas recirculation; said control valve being movable between a closed position and an open position, and in said open position said flow of exhaust gas recirculation being supplied to said positive displacement pump; anda variable speed motor driving said positive displacement pump.