Reduction of the particulate and nitric oxide from the diesel engine usinga plasma chemical hybrid system

A new plasma/catalyst continuously regenerative hybrid system (PCRHS) is in troduced to reduce diesel particulate matter (DPM), NOx, CO, etc., containe d in diesel exhaust gas. The catalyst temperature, plasma energy density, a nd exhaust gas characteristics were investigated with a passenger diesel ca r (2500cc) at the dynamometer test bed and chassis dynamometer with CVS-75 test mode. It was reported that the smoke removal efficiency was around 70% at the dynamometer test bed with 80 W energy consumption, and that PM remo val efficiency was 68% at the chassis dynamometer. The NOx was reduced up t o 20% according to the electrode types and temperature, respectively. The h ybrid system test shows that DPM and CO were almost removed and NOx reduced to 30% simultaneously by the system. Considering these results, PCRHS coul d be a promising method to regenerate diesel particulate. (C) 2001 American Institute of Physics.