Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1995-10-17
1997-03-18
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
F02M 2507
Patent
active
056112033
ABSTRACT:
An exhaust gas recirculation system for an internal combustion engine by which a portion of exhaust gases produced by the engine is recirculated from an exhaust line of the engine into an intake line of the engine introduces the EGR exhaust gas flow into the intake passageway via a mixer ejector which is provided with mixer lobes and a diffuser downstream of the lobes. The mixer ejector enhances the momentum transfer from the intake flow to the exhaust flow, and in this way, the static pressure of the exhaust flow at the entrance to the mixing region is decreased, thereby increasing the differential pressure across the EGR tube and increasing the exhaust flow. In a second embodiment, in addition to, or instead of, using the special ejector construction of the first embodiment, an ejector pump is located in the EGR tube. The ejector in the EGR tube is connected to the vehicle air system compressor or turbocompressor and serves to pump the exhaust gases to the engine intake passageway. This embodiment enables a more precise controlling of the EGR rate to be obtained, and can provide more EGR flow that which could be obtained with an intake ejector or venturi alone.
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American Institute of Aeronautics and Astronautics, Paper No. AIAA-88-0188, Entitled Parameter Effects on Mixer-Ejector Pumping Performance, Stanley A. Skebe, Duane C. McCormick, Walter M. Presz, Jr.
Henderson Gregory H.
Sudhakar Van
Cummins Engine Company, Inc.
Koczo Michael
Leedom Jr. Charles M.
Safran David S.
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