Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1995-05-02
1997-06-24
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60275, F01N 318
Patent
active
056408455
ABSTRACT:
A NO.sub.X control system for an internal combustion engine includes an oxygen enrichment device that produces oxygen and nitrogen enriched air. The nitrogen enriched air contains molecular nitrogen that is provided to a spark plug that is mounted in an exhaust outlet of an internal combustion engine. As the nitrogen enriched air is expelled at the spark gap of the spark plug, the nitrogen enriched air is exposed to a pulsating spark that is generated across the spark gap of the spark plug. The spark gap is elongated so that a sufficient amount of atomic nitrogen is produced and is injected into the exhaust of the internal combustion engine. The injection of the atomic nitrogen into the exhaust of the internal combustion engine causes the oxides of nitrogen to be reduced into nitrogen and oxygen such that the emissions from the engine will have acceptable levels of NO.sub.X. The oxygen enrichment device that produces both the oxygen and nitrogen enriched air can include a selectively permeable membrane.
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patent: 4587807 (1986-05-01), Suzuki
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Translation of German pat No. 3409859.
Hilliard, J.C. and F.J. Weinberg, "Effect of nitrogen-containing plasmas on stability, NO formation and sooting of flames", Nature, vol. 259 pp. 556-557, Feb. 9, 1976.
Ng Henry K.
Novick Vincent J.
Sekar Ramanujam R.
Hart Douglas
The University of Chicago
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