Nitrogen enriched air supply for gasoline compression ignition combustion
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United States of America Patent
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Aug 13, 2019
Grant Date -
Oct 4, 2018
app pub date -
Mar 31, 2017
filing date -
Mar 31, 2017
priority date (Note) -
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Abstract
A gasoline compression ignition engine, a vehicle and a method of operating a gasoline compression ignition engine. An inlet air management system includes a membrane-based separator and an exhaust gas recirculation flowpath that cooperate to deliver a nitrogen enriched air stream to the engine to help reduce exhaust gas emissions. The separator segregates the incoming air into the nitrogen enriched air stream as well as an oxygen enriched air stream such that the latter can be used for various engine load conditions, as well as for supplemental air for a cabin or related passenger compartment within a vehicle that is powered by the engine. Significantly, during an increase in engine load not associated with the cold start and warm-up conditions, the nitrogen enriched air supply that is used for the exhaust gas emissions reduction is provided at least partially by the nitrogen enriched air stream from the separator, as well as increasingly by the nitrogen enriched combustion product stream from the exhaust gas recirculation flowpath.
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