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Title: Variable oxygen/nitrogen enriched intake air system for internal combustion engine applications

An air supply control system for selectively supplying ambient air, oxygen enriched air and nitrogen enriched air to an intake of an internal combustion engine includes an air mixing chamber that is in fluid communication with the air intake. At least a portion of the ambient air flowing to the mixing chamber is selectively diverted through a secondary path that includes a selectively permeable air separating membrane device due a differential pressure established across the air separating membrane. The permeable membrane device separates a portion of the nitrogen in the ambient air so that oxygen enriched air (permeate) and nitrogen enriched air (retentate) are produced. The oxygen enriched air and the nitrogen enriched air can be selectively supplied to the mixing chamber or expelled to atmosphere. Alternatively, a portion of the nitrogen enriched air can be supplied through another control valve to a monatomic-nitrogen plasma generator device so that atomic nitrogen produced from the nitrogen enriched air can be then injected into the exhaust of the engine. The oxygen enriched air or the nitrogen enriched air becomes mixed with the ambient air in the mixing chamber and then the mixed air is supplied to the intake of the engine. Asmore » a result, the air being supplied to the intake of the engine can be regulated with respect to the concentration of oxygen and/or nitrogen.« less
 [1];  [2];  [3]
  1. (Woodridge, IL)
  2. (Naperville, IL)
  3. (Elmhurst, IL)
Issue Date:
OSTI Identifier:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5649517
Contract Number:
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
variable; oxygen; nitrogen; enriched; intake; air; internal; combustion; engine; applications; supply; control; selectively; supplying; ambient; mixing; chamber; fluid; communication; portion; flowing; diverted; secondary; path; permeable; separating; membrane; device; due; differential; pressure; established; separates; permeate; retentate; produced; supplied; expelled; atmosphere; alternatively; valve; monatomic-nitrogen; plasma; generator; atomic; injected; exhaust; mixed; result; regulated; respect; concentration; air flowing; oxygen enriched; selectively supplying; plasma generator; atomic nitrogen; nitrogen enriched; permeable membrane; ambient air; internal combustion; air flow; fluid communication; combustion engine; enriched air; differential pressure; control valve; mixing chamber; air supply; selectively permeable; intake air; generator device; engine applications; mixed air; permeable air; air intake; device separates; /123/60/