초록 ▼

An exhaust gas recirculation pump is used to pump exhaust gas from an exhaust manifold to the intake manifold of an engine. The recirculation pump is hydraulically actuated. The compressor stage of a turbocharger is hydraulically assisted by a hydraulically-driven turbine mechanically connected to t

An exhaust gas recirculation pump is used to pump exhaust gas from an exhaust manifold to the intake manifold of an engine. The recirculation pump is hydraulically actuated. The compressor stage of a turbocharger is hydraulically assisted by a hydraulically-driven turbine mechanically connected to the turbocharger compressor stage to provide additional compressed intake airflow during transient engine conditions or during periods when the engine provides low exhaust energy to the gas-driven turbine section of the turbocharger.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas recirculation system for an engine having an intake manifold and an exhaust duct, comprising:an exhaust gas recirculation pump having a compressor stage in fluid communication with said exhaust duct and with said intake manifold of the engine whereby said c

[ What is claimed is:] [1.] An exhaust gas recirculation system for an engine having an intake manifold and an exhaust duct, comprising:an exhaust gas recirculation pump having a compressor stage in fluid communication with said exhaust duct and with said intake manifold of the engine whereby said compressor stage is adapted to draw exhaust gas from said exhaust duct, compress said drawn exhaust gas, and discharge the compressed exhaust gas into a passageway communicating said compressor stage with said intake manifold, and a hydraulically-driven turbine mechanically connected to said compressor stage and in controlled fluid communication with a source of pressurized fluid; anda gas flow control valve disposed in said passageway communicating said compressor stage with said intake manifold of the engine, said gas flow control valve being adapted to control the flow of compressed gas from said compressor stage to said intake manifold.