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大豆毛油制备生物柴油在发动机上的应用

Keywords: 汽车工程,内燃机,大豆毛油制备生物柴油,性能,排放特性

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Abstract:

为了研究大豆毛油制备生物柴油对直喷式柴油机性能的影响,测试了生物柴油的主要理化特性指标,通过发动机台架试验,对比分析了不同体积分数生物柴油/柴油混合燃料发动机的动力性、经济性和排放特性,探讨了生物柴油对发动机性能的影响机理。研究结果表明生物柴油的粘度、闪点和酸值明显高于柴油,密度和凝点略高于柴油,但热值和冷滤点略低于柴油;生物柴油/柴油混合燃料发动机的动力性与柴油机相比有所降低,有效燃油消耗率有所升高,有效能量消耗率与柴油机相差不明显。在外特性工况运行,柴油发动机的CO、HC和碳烟排放明显高于混合燃料发动机,而NO?排放略低;在中、小负荷工况,柴油发动机的CO和碳烟排放与混合燃料发动机相差不明显,在大负荷工况则有明显升高;在整个负荷范围内生物柴油的HC排放低于柴油,而NO?排放略有升高。

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