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Exhaust emission reduction by combustion engines by barrier discharge

A new reactor/generator system
 

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Warrendale, Pa.: SAE, 1999, 7 pp. : Ill., Lit.
SAE Technical Papers, 1999-01-3638
English
Report
Fraunhofer ILT ()

Abstract
An improved plasma reactor has been disigned, built and evaluated. It is characterized by a reduced power per area ratio, relative to previous designs, and includes several improvements to run the whole system safely in a car. The new reactor design includes a concentric inner high voltage electrode, a grounded outer electrode, a shielded high-voltage and high temperature resistant electrical connection. A generator controller has been developed for better control of operating conditions as required during the engine cold start phase. The new generator/reactor system was installed in the exhaust pipe of a gasoline direct injection engine. HC emissions could be reduced up to 30 per cent in the first 40 seconds of a cold start test. In addition to HC treatment the dielectric barrier discharge has also been investigated as a method for regenerating a diesel particulate trap.

: http://publica.fraunhofer.de/documents/B-60073.html