| 熊兴旺，高俊华.双级串联DOC+POC柴油机排放特性研究[J].内燃机工程,2017,38(6):41-45. |
| 双级串联DOC+POC柴油机排放特性研究 |
| Study on Emission Characteristics of Diesel Engine with Two Groups of DOC+POC in Series |
| DOI： |
| 关键词:DOC+POC WHTC循环 颗粒物 颗粒物数量浓度 |
| Key Words:DOC+POC WHTC cycle particulate matter particulate number |
| 基金项目: |
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| 摘要:为了应对“特京五”对颗粒物数目的要求，在一台满足国Ⅳ标准柴油机上，以国Ⅴ柴油原排试验结果为基准，对一组氧化型催化器(DOC)+微粒氧化催化转化器(POC)后处理和两组DOC+POC后处理串联时热态全球统一瞬态循环(WHTC)的气态污染物和颗粒物排放结果进行了对比研究。结果表明：单组DOC+POC的净化能力为颗粒物质量降低63%，颗粒物数目降低23%；两组DOC+POC串联可使颗粒物质量降低74%，颗粒物数目降低79%，并可以避免一组DOC+POC方案时颗粒物数量浓度瞬时排放超过原排的现象。采用两组DOC+POC串联方案时，燃用国Ⅲ柴油的排放结果与国Ⅴ柴油的排放结果基本持平，表明两组DOC+POC串联后处理方案可以克服燃油品质变差对颗粒物排放带来的不利影响。 |
| Abstract:In order to meet the requirement of the Special Beijing Phase V Standard on the number of particulate matter, hot world harmonized transient cycle (WHTC) tests were conducted on a China Ⅳ diesel engine fueled with China Ⅴ diesel fuel. Gaseous and particulate matter emissions from the engine with one single group of diesel oxidation catalyst(DOC) +particulate oxidation catalyst(POC) and with two groups of DOC+POC in series were compared with those from the engine without after-treatment. The results show that compared with the results without after-treatment, particulate matter and particulate number with one single group of POC+DOC are reduced by 63% and 23% respectively, while those with two groups of POC+DOC in series are reduced by 74% and 79% respectively. Two-groups of POC+DOC in series do not make the transient particulate number exceed the one without after-treatment as one single group of DOC+POC does. Equipped with two groups of DOC+POC in series, the emissions from the engine even fueled with China Ⅲ diesel fuel are equivalent to those fueled with China Ⅴ diesel fuel, which means that the usage of two groups of DOC+POC in series can overcome the adverse effects of fuel of worsened quality on pollution. |
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