초록 ▼

A system is provided for rapidly changing the flow of recirculated exhaust gas to each cylinder of an internal combustion engine operating on diesel fuel or other fuels. The system preferably includes an exhaust gas recirculation line having an exhaust gas recirculation pump along with a reservoir a

A system is provided for rapidly changing the flow of recirculated exhaust gas to each cylinder of an internal combustion engine operating on diesel fuel or other fuels. The system preferably includes an exhaust gas recirculation line having an exhaust gas recirculation pump along with a reservoir and cooler for storing a desired volume of recirculated exhaust gas. Recirculated exhaust gas is preferably supplied from the reservoir to each cylinder of the associated engine through respective recirculated exhaust gas conduits. A metering valve is preferably disposed within each recirculated exhaust gas conduit immediately adjacent to each cylinder. The metering valves provide uniform distribution of recirculated exhaust gas to the respective cylinders and allow the system to rapidly change the flow of recirculated exhaust gas to each cylinder. The system provides recirculated exhaust gas at a point close to the combustion chamber where it is needed for effective reduction of undesirable NO.sub.x emissions.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas recirculation system for an internal combustion engine having at least one cylinder with an intake manifold for supplying air to the cylinder and an exhaust manifold for receiving exhaust gas from the cylinder comprising:an exhaust gas recirculation (EGR) l

[ What is claimed is:] [1.] An exhaust gas recirculation system for an internal combustion engine having at least one cylinder with an intake manifold for supplying air to the cylinder and an exhaust manifold for receiving exhaust gas from the cylinder comprising:an exhaust gas recirculation (EGR) line to receive a portion of the exhaust gas flowing from the exhaust;an EGR cooler coupled with the EGR line operable to cool only recirculated exhaust gas;a plurality of exhaust gas conduits, each extending from the EGR lines to an associated intake port for a cylinder of the engine, the junction of each exhaust gas conduit and each intake port being proximate to an associated cylinder;a plurality of EGR control valves, a control valve disposed within each exhaust gas conduit, for controlling only recirculated exhaust gas flow to the associated cylinder; anda control unit for regulating the flow of recirculated exhaust gas through each control valve to the cylinder.