Application of greed type DBD in diesel engine exhausts cleaning

Summary form only given. The regulations of diesel exhaust emissions become stricter, so investigations of catalytic and plasma assisted exhaust treatment become more intensive. The present work continues our investigations on engine emissions treatment with discharges assistance. We designed variations of greed shaped dielectric barrier discharge (DBD) plasma sources in order to reduce the NO_x content of a diesel engine exhaust, testing it on the different engine operation modes. An effect of combined work of plasma source and soot filters on particulate matter (PM) was studied. Discharge frequency has a crucial impact on equipment performance and gas treatment. The plasma source supply frequency was varying from 400 Hz to 28.5 kHz. A 95 % decreasing of NO and 70 % reduction of NO_x was obtained. It was found that the discharge application increased efficiency of carbon particles removing 1.4 times.