车用发动机
車用髮動機
차용발동궤
2014年
4期
89-92
,共4页
柴油机%颗粒氧化催化器%柴油氧化催化器%燃料试验%排放控制
柴油機%顆粒氧化催化器%柴油氧化催化器%燃料試驗%排放控製
시유궤%과립양화최화기%시유양화최화기%연료시험%배방공제
diesel engine%particle oxidation catalyst(POC)%diesel oxidation catalyst (DOC)%fuel test%emission control
采用高硫柴油、国Ⅲ、国Ⅳ和国Ⅴ4种不同硫含量的基准燃油,在发动机台架上进行了加装DOC+ POC后处理装置的国Ⅳ柴油机的ESC 13工况测试,并用AVL AMA i60气体分析仪对CO ,HC ,NOx 和PM 排放进行测量。研究了不同基准燃油对加装DOC+POC后处理装置的国Ⅳ柴油机的排放影响,并与原机作了对比。研究结果表明,CO和 HC的转化效率与燃油硫含量有很好的相关性,DOC+ POC 后处理可有效减小CO和 HC的排放,稳态循环下国Ⅴ柴油CO和HC的平均转化效率分别为90.6%和86.6%,且随着燃油中含硫量的降低而增大,特别是在高转速大负荷工况。受燃油硫含量影响,DOC+ POC 后处理装置对高硫柴油、国Ⅲ、国Ⅳ3种燃油的PM排放降低不起作用,反而会使PM 排放增加,然而对国Ⅴ柴油的PM净化率可达81.8%。
採用高硫柴油、國Ⅲ、國Ⅳ和國Ⅴ4種不同硫含量的基準燃油,在髮動機檯架上進行瞭加裝DOC+ POC後處理裝置的國Ⅳ柴油機的ESC 13工況測試,併用AVL AMA i60氣體分析儀對CO ,HC ,NOx 和PM 排放進行測量。研究瞭不同基準燃油對加裝DOC+POC後處理裝置的國Ⅳ柴油機的排放影響,併與原機作瞭對比。研究結果錶明,CO和 HC的轉化效率與燃油硫含量有很好的相關性,DOC+ POC 後處理可有效減小CO和 HC的排放,穩態循環下國Ⅴ柴油CO和HC的平均轉化效率分彆為90.6%和86.6%,且隨著燃油中含硫量的降低而增大,特彆是在高轉速大負荷工況。受燃油硫含量影響,DOC+ POC 後處理裝置對高硫柴油、國Ⅲ、國Ⅳ3種燃油的PM排放降低不起作用,反而會使PM 排放增加,然而對國Ⅴ柴油的PM淨化率可達81.8%。
채용고류시유、국Ⅲ、국Ⅳ화국Ⅴ4충불동류함량적기준연유,재발동궤태가상진행료가장DOC+ POC후처리장치적국Ⅳ시유궤적ESC 13공황측시,병용AVL AMA i60기체분석의대CO ,HC ,NOx 화PM 배방진행측량。연구료불동기준연유대가장DOC+POC후처리장치적국Ⅳ시유궤적배방영향,병여원궤작료대비。연구결과표명,CO화 HC적전화효솔여연유류함량유흔호적상관성,DOC+ POC 후처리가유효감소CO화 HC적배방,은태순배하국Ⅴ시유CO화HC적평균전화효솔분별위90.6%화86.6%,차수착연유중함류량적강저이증대,특별시재고전속대부하공황。수연유류함량영향,DOC+ POC 후처리장치대고류시유、국Ⅲ、국Ⅳ3충연유적PM배방강저불기작용,반이회사PM 배방증가,연이대국Ⅴ시유적PM정화솔가체81.8%。
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% .