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对生物柴油的十六烷值改进进行了研究。Cetane value of bio-diesel was improved by adding the improver.

机车柴油机烧低十六烷值柴油具有很重要的现实意义。It is significant for locomotive diesel engine to burn low cetane fuel.

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硝酸环己酯是一种有效的柴油十六烷值改进剂。Cyclohexyl nitrate is an effective cetane number improver for diesel oil.

高性能柴油发动机的运作十六烷值50或更高价值的最佳。High performance diesel engines operate best with cetane values of 50 or higher.

这是一个具有很大准确性的预测十六烷值的辅助工具，但应适当注意到其局限性。It is a supplementary tool for predicting cetane number with considerable accuracy when used with due regard for its limitations.

实践证明，该技术能够有效地提高催化裂化柴油的十六烷值，并能降低产品的胶质。The result showed that the said technology improved the LCO cetane number effectively, and reduced the existent gum of the product.

用此方法可以计算汽油的辛烷值、柴油的十六烷值、馏分油中芳烃和硫含量。Through it, octane value of gasoline, cetane value of diesel oil, aromatics and sulphur contents in fraction oil can be calculated.

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通过实测直喷式柴油机燃烧不同十六烷值柴油时的缸内压力示功图，以此计算出相应的燃烧放热规律。According to its indicated pressure diagrams measured under the condition of burning diesel fuels with different cetane number in D.

沸点再升高，油品的十六烷指数与十六烷值的差值变大。If the boiling point is higher than 300℃, the difference between cetane index and cetane value increases with increase of boiling point.

本文根据柴油发动机中燃料的工作特性，采用自燃点的方法预测十六烷值。Based on the performance of diesel fuels in diesel engine, the cetane number was predicted by the determination of autoignition temperature.

就柴油十六烷值改进剂的种类、作用机理及其研制的重要意义做了综述，介绍了部分十六烷值改进剂的性能特点。Some properties of petroleum products in refinery such as gasoline octane number and diesel cetane number are necessary to be online monitored.

在高速增负荷工况下，十六烷值为66和55，燃料的排气烟度基本相近。Under the high speed increasing torque operating conditions, the two fuel cetane numbers 66 and 55 have no difference on opacity smoke emission.

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壳牌GTL燃料是一种同质合成燃料，基本不含硫份和芳香烃，具有较高的十六烷值，从而可提高燃料的燃烧性能。Shell GTL Fuel is a homogenous synthetic fuel with virtually no sulphur and aromatics, and a high cetane level which improves fuel combustibility.

结果表明，在柴油中添加DMC，燃料十六烷值降低，发动机热效率提高，烟度减小。The results show that the fuel cetane number and engine exhaust smoke decrease and engine thermal efficiency improves with adding DMC in diesel fuel.

结果表明，采用高十六烷值燃料二甲基醚和高辛烷值燃料天然气，可以拓宽均质压燃的运行工况范围。The results indicate that the operation region of HCCI engine can be extended by using DME with a high cetane number and CNG with a high octane number.

指出了十六烷值改进剂应具备的性能和发展方向，并提出了发展建议。In the end, the expected performance of cetane improvers and the prospects of this kind of additives as well as the promising advancement are concerned.

另一方面，由于长年开采，我国油田的油质逐年下降，所供油品十六烷值降低，并且杂质含量等指标逐年增高。The petroleum quality in our country became worse one year by one , thus, the cetane number decrease , and impurity content of petroleum increase every year.

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从柴油产品质量的发展趋势看，柴油油品向着低硫、低芳烃、窄馏分、高十六烷值的方向发展已成为必然。According to the development tendency of diesel product quality, diesel oils will focus on lower sulfur and aromatic contents along with higher cetane number.

研究了十六烷值改进剂对轻型高速柴油机燃用乙醇柴油燃料时放热率与排放特性的影响。The influence of cetane number improver on heat release rate and emissions of a high-speed diesel engine fueled with ethanol-diesel blend fuel was investigated.

二甲醚的分子结构中不含C-C键，且为含氧燃料，同时具有十六烷值高、雾化特性好等特点。The molecular structure of DME doesn't have C-C bond, and contains high proportion of oxygen, high cetane number and good spray characteristics at the same time.