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中文摘要：
为了研究柴油／甲醇组合燃烧（DMCC）方式对发动机排放性能的影响，在增压中冷发动机上采用DMCC方式，对甲醛排放特性进行研究，另外在DMCC模式下对加装氧化催化转换器前后常规排放进行对比．结果表明：在各负荷下，甲醛排放均随着甲醇喷射量的增加而升高；在甲醇喷射量不变的情况下，甲醛排放随着负荷的增加明显降低．增压中冷发动机的NOx和碳烟及微粒排放同时大幅度下降，但HC和CO排放增加较多．加装氧化催化转化器后，HC和CO排放得到了大幅度降低，微粒排放也进一步减少．
英文摘要：
Regulated emissions and formaldehyde emission from a turbocharged inter-cooled diesel engine WlUl or without oxidation catalyst have been reported when the diesel/methanol compound combustion mode was used. The test results showed that formaldehyde emission increased with the increasing of methanol injection under all loads, while it obviously decreased with the increasing of engine load at a fixed methanol injection. The emissions of NOx and PM emissions were greatly reduced, while HC and CO emissions were dramatically increased. However, those unburned HC and CO were eliminated with the installation of a diesel oxidation catalyst converter （DOC）, furthur reducing PM emission.
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