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Study of combustion and emission characteristics of a diesel engine operated with dimethyl carbonate

机译：研究碳酸二甲酯驱动的柴油机的燃烧和排放特性

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As an oxygenated additive, dimethyl carbonate (DMC) is usually blended with diesel fuel to improve combustion and reduce emissions of diesel engines. However, it is difficult to fuel diesel engines directly with DMC due to its low cetane number and high latent heat of vaporization. To study DMC combustion in diesel engines, this paper proposes an approach that combines internal exhaust gas recirculation (EGR) with a small injection of diesel fuel to ignite the DMC. Based on this approach, a two stroke, single cylinder diesel engine was developed. Preliminary studies demonstrated that this engine can be fueled with DMC with almost zero level of smoke and a low exhaust gas temperature. This DMC fueled engine has lower nitrogen oxides (NO_x) emissions and 2-3% higher effective thermal efficiency than the engine operated with diesel fuel in moderate and high load zones. Further experiments were conducted on a set of advanced digital particle image velocimetry (DPIV) measurement system to study the DMC spray.
机译：作为一种含氧添加剂，通常将碳酸二甲酯（DMC）与柴油混合，以改善燃烧并减少柴油发动机的排放。但是，由于十六烷值低且汽化潜热高，因此难以直接使用DMC为柴油发动机提供燃料。为了研究柴油发动机中的DMC燃烧，本文提出了一种结合内部废气再循环（EGR）和少量柴油喷射来点燃DMC的方法。基于此方法，开发了两冲程单缸柴油发动机。初步研究表明，该发动机可使用DMC进行燃料供应，烟气几乎为零，排气温度低。与在中等和高负荷区域中使用柴油燃料运行的发动机相比，这种以DMC燃料驱动的发动机排放的氮氧化物（NO_x）更低，有效热效率高2-3％。在一套先进的数字粒子图像测速仪（DPIV）测量系统上进行了进一步的实验，以研究DMC喷雾剂。

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