The effects of gasoline mixed with different proportions of hydrous ethanol on NOx emission and catalytic conversion efficiency of threeway catalyst were studied by engine bench test. The experimental results show that NOx emission of E10,E20,and E30 before the catalytic converter in idle condition decreases by 64%,68% and 69.5% respectively after being fueled with hydrous ethanol gasoline. With the increase of hydrous ethanol proportion, the catalytic conversion efficiency of NOx decreases. The catalytic conversion efficiency of E10,E20, and E30 decreases by 19%,24% and 34% respectively. The NOx emission of hydrous ethanol gasoline before the catalytic converter is lower than that of 93# gasoline at low load and becomes higher after increasing the load. NOx emission of E20,E30,E10 and 93# gasoline decreases in turn. The NOx emission of E20 increases by 6% in medium and high load compared with 93# gasoline. The NOx emissions after the catalytic converter are higher than that of 93# gasoline in medium and high load and those of E10, E20 and E30 are 15%, 6% and 29% higher than 93# gasoline respectively in high load. The catalytic conversion efficiency of NOx decreases with the increase of hydrous ethanol ratio and that of E30 is around 92% of 93# gasoline under high load conditions.
YE Yanshuai
,
LING Huamei
,
NIU Caiyun
,
TAN Yan
,
LI Chunqing
. Effects of Hydrous Ethanol Gasoline on Engine NOx Emission[J]. Vehicle Engine, 2018
, 0(2)
: 64
-67
.
DOI: 10.3969/j.issn.1001-2222.2018.02.011
