高排气背压柴油机配气相位优化仿真及试验研究
发布时间：2018-07-26 16:17
【摘要】：搭建某16 V增压柴油机的一维仿真GT-power模型,并通过试验数据对模型进行标定。分别对柴油机在高排气背压下工作时,进气早开角、进气晚关角、排气早开角和排气晚关角对柴油机性能的影响进行了计算和分析,并且借助多学科设计优化软件Isight,采用改进的非支配排序遗传算法对配气相位进行了多目标优化。最后在寻优结果的基础上,进行试验研究。结果表明高排气背压下工作的柴油机,配气相位优化的主要方向是通过减小进气早开角和排气晚关角以减小气门叠开角,从而减小高排气压力对缸内废气倒灌以及进气道倒灌的影响;在降低涡前排温的同时,由于充气效率的降低,会导致柴油机的燃油消耗率升高;通过多目标优化对配气相位优化后,涡前排温降低了10.9℃,有效地改善了柴油机在高排气背压下的热负荷问题。
[Abstract]:One dimensional simulation GT-power model of a 16 V turbocharged diesel engine was built and calibrated by experimental data. In this paper, the influence of the intake early opening angle, the intake late closing angle, the exhaust early opening angle and the exhaust late closing angle on the performance of the diesel engine under high exhaust back pressure are calculated and analyzed. With the aid of the multidisciplinary design optimization software Isight, an improved undominated sorting genetic algorithm is used to optimize the phase of gas distribution. Finally, on the basis of the optimization results, the experimental study is carried out. The results show that the main direction of valve phase optimization for diesel engine operating under high exhaust back pressure is to reduce the valve folding angle by reducing the inlet early opening angle and exhaust late closing angle. In order to reduce the influence of high exhaust pressure on the exhaust gas recharge in cylinder and inlet the fuel consumption rate of diesel engine will be increased because of the decrease of aeration efficiency while reducing the temperature of vortex front exhaust. By multi-objective optimization, the vortex front exhaust temperature is reduced by 10.9 鈩，
本文编号：2146564
[Abstract]:One dimensional simulation GT-power model of a 16 V turbocharged diesel engine was built and calibrated by experimental data. In this paper, the influence of the intake early opening angle, the intake late closing angle, the exhaust early opening angle and the exhaust late closing angle on the performance of the diesel engine under high exhaust back pressure are calculated and analyzed. With the aid of the multidisciplinary design optimization software Isight, an improved undominated sorting genetic algorithm is used to optimize the phase of gas distribution. Finally, on the basis of the optimization results, the experimental study is carried out. The results show that the main direction of valve phase optimization for diesel engine operating under high exhaust back pressure is to reduce the valve folding angle by reducing the inlet early opening angle and exhaust late closing angle. In order to reduce the influence of high exhaust pressure on the exhaust gas recharge in cylinder and inlet the fuel consumption rate of diesel engine will be increased because of the decrease of aeration efficiency while reducing the temperature of vortex front exhaust. By multi-objective optimization, the vortex front exhaust temperature is reduced by 10.9 鈩，
本文编号：2146564
本文链接：https://www.wllwen.com/kejilunwen/dongligc/2146564.html
