Exhaust Emission Reduction of Combustion Engines by Barrier Discharge - A new Reactor/Generator System 1999-01-3638
An improved plasma reactor has been designed, 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 % 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.
Citation: Lepperhoff, G., Scharr, D., Pischinger, S., Neff, W. et al., "Exhaust Emission Reduction of Combustion Engines by Barrier Discharge - A new Reactor/Generator System," SAE Technical Paper 1999-01-3638, 1999, https://doi.org/10.4271/1999-01-3638. Download Citation
G. Lepperhoff, D. Scharr, Stefan Pischinger, W. Neff, F.-J. Trompeter, K. Pochner
FEV Motorentechnik, Lehrstuhl für Verbrennungskraftmaschinen, RWTH Aachen, Fraunhofer-Institut für Lasertechnik
International Fuels & Lubricants Meeting & Exposition
Non-Thermal Plasma for Exhaust Emission Control: Nox, Hc, and Particulates-SP-1483