@article{PATENT,
      recid = {9098},
      title = {Variable oxygen/nitrogen enriched intake air system for  internal combustion engine applications},
      number = {PATENT},
      month = {Jul},
      year = {1997},
      abstract = {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. As 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.},
      url = {http://knowledge.uchicago.edu/record/9098},
}