An experimental study on the NO2 and NH3 emission characteristics of state IV diesel engines

作者：Gao Zhang^*; Liu Shuangxi; Yan Fuwu; Wang Fengbin

来源：Qiche Gongcheng/automotive Engineering, 2010, 32(7): 582-585.

• Driving cycle
• Emission characteristics
• ESC
• Experimental studies
• High load
• NH3
• NO2
• Sampling systems
• Test rigs
• Working conditions

Tests are conducted on State-IV diesel engine with ESC driving cycle on a test rig with CVS full-flow dilution sampling system. By comparing the NO2 and NOx emission characteristics of diesel engine with and without aftertreament devices of DOC+POC and SRC, the proportion of NO2 in NOx emission and the slip of secondary pollutant NH3 in SRC system are analyzed. The results show that DOC+POC system can raise the proportion of NO2 in NOx, but the effect on NOx emission is insignificant in the most working conditions. When SRC system is used, the proportion of NO2 is lower than that in DOC+POC system; in addition, the slip of NH3 also takes place, in particular, it is more severe in high load conditions.

• 出版日期2010