Experimental Study on the Effect of Mixer on the Performance of Emission in Automotive Diesel Engine
Diesel vehicles of urea is pyrolyzed to NH3 and NOx by the mixer.The difference in the uniform distribution of NH3 in the mixer affects the NOx conversion efficiency and NH3 leakage.Different mixers were selected for WHTC cycle and WHSC cycle.The results showed:The NOx conversion efficiency and conversion rate of SCR were improved with the increase of the mixer uniformity index high performance uniform index was more effectivein suppressing NH3 leakage.3#mixers was NOx emission of transient cycle 0.186 g·(kW·h)-1 and steady-state cycles 0.041 g·(kW·h)-1,NH3 leakage of transient cycle 0.254×10-6 and steady-state cycles 0.068×10-6;2#mixers was NOx emission of transient cycle 0.346 g·(kW·h)-1 and steady-state cy-cles 0.063 g·(kW·h)-1,NH3 leakage of transient cycle 2.944×10-6 and steady-state cycles 2.254×10-6.
万方数据
维普
