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首页> 外文会议>International Conference on Smart and Sustainable Technologies >Investigation on pilot injection with various Start of Injection two and fuel injection pressure in common rail direct injection diesel engine
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Investigation on pilot injection with various Start of Injection two and fuel injection pressure in common rail direct injection diesel engine

机译：共轨直喷柴油机不同喷油嘴两种喷油方式的引燃研究。

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This experimental study was carried out using a single-cylinder CI engine under the pilot injection strategy to investigate the effect of fuel injection pressure and the position of the start of combustion 2 (SOI2) on combustion characteristics and emission. The fuel mixtures used in this experiment were gasoline 80% mixed with Biodiesel 20% distinguished by volume. The double pilot injection was applied with varying the SOI2. Meanwhile, SOI1 was fixed at −350° BTDC with 900 bar fuel injection pressure. At SOI2 fuel injection pressure was varied between 400-900bar. The results show that increasing fuel injection pressure will most effect on ignition delay and the start of combustion (SOC). Higher fuel injection pressure will decrease the ignition delay due to smaller fuel stratification. Meanwhile, retarding SOI2 will affect SOC to occurs faster due to closer injection timing to TDC which lower the possibility of Low Thermal Combustion (LTC). NOx emissions will be shown increases as a sign of proper mixing fuel with oxygen which contrary to CO emission. Higher fuel injection pressure will produce a smaller fuel spray that enhances the mixing of fuel and air which decrease NOx while increasing CO emission. As the LTC strategy can produce low emission of NOx, injection fuel closer to TDC will improve NOx while decreasing CO emissions.
机译：该实验研究是使用单缸CI发动机在先导喷射策略下进行的，旨在研究燃料喷射压力和燃烧开始2（SOI2）位置对燃烧特性和排放的影响。在该实验中使用的燃料混合物是80％的汽油与20％的体积比的生物柴油混合。在改变SOI2的情况下进行了两次先导注入。同时，SOI1在900 bar的燃油喷射压力下固定在-350°BTDC上。在SOI2时，燃料喷射压力在400-900bar之间变化。结果表明，增加燃油喷射压力将对点火延迟和燃烧开始（SOC）产生最大影响。由于较小的燃油分层，较高的燃油喷射压力将减少点火延迟。同时，由于与TDC的喷射时间更近，延迟的SOI2将影响SOC更快地发生，从而降低了低热燃烧（LTC）的可能性。与将CO排放相反，将NOx排放显示为燃料与氧气正确混合的标志。较高的燃料喷射压力将产生较小的燃料喷雾，从而增强燃料与空气的混合，从而减少NOx并增加CO排放量。由于LTC策略可以产生低NOx排放，因此更接近TDC的喷射燃料将改善NOx，同时减少CO排放。

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