초록 ▼

Past exhaust emission control systems fail to utilize exhaust gas recirculation during all operating parameters of an engine. The present exhaust gas recirculation system reduces the emissions emitted from an engine during all operating parameters of the engine. The engine includes a cylinder, a rot

Past exhaust emission control systems fail to utilize exhaust gas recirculation during all operating parameters of an engine. The present exhaust gas recirculation system reduces the emissions emitted from an engine during all operating parameters of the engine. The engine includes a cylinder, a rotatable crankshaft and a turbocharger defining a compressor section compressing a flow of intake air to a first preestablished pressure and being driven by a flow of exhaust gas having a first preestablished pressure. The exhaust gas recirculation system is comprised of a portion of the flow of exhaust gas being recirculated to the cylinder and forming a flow of recirculated exhaust gas. The flow of recirculated exhaust gas is cooled. A portion of the flow of intake air is compressed to a second preestablished pressure. The flow of recirculated exhaust gas is compressed to a second preestablished pressure being at least as great as the first preestablished pressure of the intake air. And, a quantity of the flow of recirculated exhaust gas is controlled by a valve having an open position in which intake air flows therethrough and a closed position in which the flow of intake air is blocked.

대표청구항 ▼

[ What is claimed is:] [1.] 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 exhaus

[ What is claimed is:] [1.] 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 recirculated exhaust gas, said flow of recirculated exhaust gas being cooled prior to being pressurized to a preestablished level and said pressurization of said flow of recirculated exhaust gas being at least as great as said preestablished pressure of said intake air; andsaid flow of recirculated exhaust gas being controlled to vary a quantity of recirculated exhaust gas depending on said operating parameter of said engine, said flow of recirculated exhaust gas controlled to vary a quantity of recirculated exhaust gas being controlled by a proportional valve.