Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1997-09-08
2000-12-26
Wolfe, Willis R.
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
12356812, 12356821, F02M 2507
Patent
active
061640719
ABSTRACT:
An exhaust gas recirculation and control system is provided for an internal combustion engine, wherein a portion of engine exhaust gas flow is recirculated through an EGR duct to engine intake air. The recirculated exhaust gas is pumped through the EGR duct by an EGR compressor driven by a dedicated EGR drive that is independently controllable. Because the EGR drive is independently powered and controlled, the EGR flow rate capacity of the system is not dictated by, or limited, by factors such as engine exhaust flow rate. A controller modulates power delivery to the drive means in response to at least one operating condition parameter in order to achieve a desired EGR flow rate. In order to further optimize efficiency, the EGR compressor is preferably a discrete displacement pump which is controllably drivable in a pulse-capture mode, wherein each intake of the EGR compressor is timed synchronously with exhaust pulses in the exhaust manifold.
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Charlton Stephen J.
Hwang Long Kung
Miller Paul R.
Shao Josh S.
Cummins Engine Company, Inc.
Wolfe Willis R.
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