Experimental investigation on injection characteristics of bioethanol–diesel fuel and bioethanol–biodiesel blends
Experimental investigation on injection characteristics of bioethanol–diesel fuel and bioethanol–biodiesel blends
复制标题
DOI：
10.1016/j.fuel.2010.11.042
复制
发表时间：
2011-05
期刊：
影响因子：
7.4
通讯作者：
E. Torres-Jiménez;M. P. Dorado;B. Kegl
中科院分区：
文献类型：
--
作者：
E. Torres-Jiménez;M. P. Dorado;B. Kegl
分析了生物乙醇-柴油和生物乙醇-生物柴油混合燃料作为柴油机燃料的喷射特性。注意力集中在喷射特性，显着影响发动机的特性，并随后的废气排放。在这种情况下，以下喷射特性进行了实验研究：燃料，喷射定时，喷射延迟，喷射持续时间，平均喷射速率，和喷射压力。所测试的燃料是纯矿物柴油燃料、由菜籽油制成的纯生物柴油燃料、生物乙醇/柴油燃料以及生物乙醇/生物柴油混合物，生物乙醇的添加量为5%，最高可达15%（v/v）。在额定工况（FL，1100 rpm）、峰值扭矩（FL，850 rpm）和最大泵转速（1100 rpm）下，在室温下，对不同部分负荷（PL 75%和PL 50%）下的混合燃料进行了试验研究。已经证明，对于所有测试的操作方案，与纯生物柴油相比，向生物柴油中添加生物乙醇减少了燃料加注、喷射正时、喷射持续时间、平均喷射速率和最大喷射压力，并且增加了喷射延迟。同时，增加生物乙醇在柴油燃料没有显着的变化或略有增加的燃料，喷射正时，喷射持续时间，和平均喷射速率和减少喷射延迟和最大喷射压力，相比于纯柴油燃料。生物柴油中的生物乙醇的影响比柴油中的影响更显著;生物乙醇的添加使生物柴油的喷射特性更接近柴油的喷射特性，从而降低生物柴油的NOx排放。
This paper analyses the fuel injection characteristics of bioethanol–diesel fuel and bioethanol–biodiesel blends considered as fuel for diesel engines. Attention is focused on the injection characteristics which significantly influence the engine characteristics and subsequently the exhaust emissions. In this context the following injection characteristics have been investigated experimentally: fuelling, injection timing, injection delay, injection duration, mean injection rate, and injection pressure. The tested fuels were neat mineral diesel fuel, neat biodiesel made from rapeseed oil, bioethanol/diesel fuel and bioethanol/biodiesel blends up to 15% (v/v) bioethanol with an increment of 5%. The fuels blends were experimentally investigated in a fuel injection M system at rated condition (FL, 1100rpm), peak torque (FL, 850rpm), and maximum pump speed (1100rpm) for different partial loads (PL 75% and PL 50%), at ambient temperature. It has been proven that for all operating regimens tested, the addition of bioethanol to biodiesel reduces fuelling, injection timing, injection duration, mean injection rate and maximum injection pressure and increases injection delay compared to pure biodiesel. Meanwhile, increasing bioethanol in diesel fuel shows no significant variations or a slightly increase in fuelling, injection timing, injection duration, and mean injection rate and a decrease in injection delay and maximum injection pressure, compared to pure diesel fuel. The influence of bioethanol in biodiesel is much more significant that in diesel fuel; it has a beneficial effect on biodiesel injection characteristics because bioethanol addition brings them nearer to the diesel fuel one and it is expected to decrease biodiesel NOxemissions.