Author(s): ZHANG Xiao-wen, WANG Feng-bin
Pages: 89-92
Year: 2014 Issue:  4
Journal: Vehicle Engine
Keyword:  diesel engine; particle oxidation catalyst(POC); diesel oxidation catalyst (DOC); fuel test; emission control;
Abstract: On a State Ⅳdiesel engine with DOC+POC device ,the high sulfur diesel ,State Ⅲ diesel ,State Ⅳ diesel and StateⅤ diesel were tested by the ESC cycle and the CO ,HC ,NOx and PM emission were measured with AVL AMA i60 analyzer . The influences of different standard fuels on diesel engine emission were researched and compared with the original engine .The results show that the conversion rates of CO and HC are well related to sulfur content and DOC + POC device can reduce the CO and HC emission .The average conversion rates of CO and HC for State Ⅴ diesel in ESC cycle are 90 .6% and 86 .6% re-spectively and increase with the decrease of sulfur content ,especially in high speed and high load .Due to the limit of sulfur content ,DOC+POC device cannot reduce the PM emission of high sulfur diesel ,State Ⅲ diesel and State Ⅳ diesel and increase the PM emission contrarily .For State Ⅴ diesel ,DOC+POC device can reduce the PM emission by 81 .8% .