Abstract In this experimental study, the usage of high bioethanol proportion in the different types of biodiesel-diesel blends were carried out to discover the effects of the high bioethanol proportion on the injection, combustion, performance and emission parameters of a common rail diesel injection (CRDI) engine with two stage injection (TSI) strategy under different engine loads. The TSI strategy consisted of two stage direct injection into the cylinder as a pilot and main injection. The bioethanol (BE) was produced used wastes originated from sugar production process, animal-based (AB) biodiesel was originated from waste fleshing oil and the vegetable based (VB) biodiesel was obtained from safflower-canola oil mixture. Pure diesel fuel (DF), three AB ternary blends (bioethanol-diesel-animal based biodiesel), and three VB ternary blends (bioethanol-diesel-vegetable based biodiesel) were determined as test fuels. Bioethanol ratios were 25% and 35% by mass in the AB and VB ternary blends, while biodiesel concentration was fixed to be 20% by mass. It was found that the maximum cylinder gas pressure (Pmax) of the VB ternary blends observed higher than that of AB ternary blends and DF at high loads, while the Pmax decreased by usage of AB and VB ternary blends at low and medium load conditions. Longer ignition delay (ID), higher thermal efficiency, lower maximum pressure rise rate (MPRR) values were observed by usage of the higher percentage of bioethanol (35 by mass%) in the AB and VB ternary blends at medium and high load conditions. AB ternary blends were more effective than the VB ternary blends on the reduction in total hydrocarbon (THC) emission, while carbon monoxide (CO) emissions increased with the increase in bioethanol content in the AB and VB ternary blends at low and high load conditions. Nitrogen oxides (NOx) and smoke emissions can be decreased by usage of high bioethanol proportion in the blends at high load conditions, simultaneously. The combustion and emission results showed that the usage of ternary blends with TSI strategy contributed to the elimination of the negative effects of the high bioethanol content.

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CRDI 发动机生物柴油-柴油混合物中高生物乙醇比例的影响

摘要 本实验研究了高生物乙醇比例在不同类型的生物柴油-柴油混合物中的使用，以发现高生物乙醇比例对共轨柴油喷射的喷射、燃烧、性能和排放参数的影响。 CRDI) 发动机在不同发动机负载下采用两级喷射 (TSI) 策略。TSI 策略包括两级直接喷射到气缸中作为先导和主喷射。生物乙醇 (BE) 是从制糖过程中产生的废旧废物中生产的，动物基 (AB) 生物柴油来自废肉油，植物基 (VB) 生物柴油是从红花油菜籽油混合物中获得的。纯柴油 (DF)，三种 AB 三元混合物（生物乙醇-柴油-动物基生物柴油），和三种 VB 三元混合物（生物乙醇-柴油-植物基生物柴油）被确定为测试燃料。在 AB 和 VB 三元混合物中，生物乙醇的质量比为 25% 和 35%，而生物柴油的浓度固定为 20%。发现 VB 三元混合物的最大气缸气压 (Pmax) 在高负荷下高于 AB 三元混合物和 DF，而 Pmax 因在低和中负荷条件下使用 AB 和 VB 三元混合物而降低。通过在中等和高负载条件下在 AB 和 VB 三元混合物中使用更高百分比的生物乙醇（35 质量％），观察到更长的点火延迟 (ID)、更高的热效率、更低的最大压力上升率 (MPRR) 值。AB 三元混合物在减少总碳氢化合物 (THC) 排放方面比 VB 三元混合物更有效，而一氧化碳 (CO) 排放量随着 AB 和 VB 三元混合物中生物乙醇含量的增加而增加，在低负荷和高负荷条件下。在高负荷条件下，通过在混合物中使用高生物乙醇比例，可以同时减少氮氧化物 (NOx) 和烟雾排放。燃烧和排放结果表明，使用三元混合物与 TSI 策略有助于消除高生物乙醇含量的负面影响。