在一台1.5 L带废气涡轮增压的直喷汽油机上进行了电动增压和废气再循环(exhaust gas recirculation,EGR)协同对发动机动力性和经济性的影响规律试验研究。结果表明:全负荷下电动增压促进最高废气再循环率随转速的上升而下降,在4个试验...在一台1.5 L带废气涡轮增压的直喷汽油机上进行了电动增压和废气再循环(exhaust gas recirculation,EGR)协同对发动机动力性和经济性的影响规律试验研究。结果表明:全负荷下电动增压促进最高废气再循环率随转速的上升而下降,在4个试验转速下分别提升了17.7%、15.2%、13.84%和0;部分负荷下电动增压促进最高废气再循环率随负荷的提高与转速下降,在6个试验工况下最高废气再循环率分别被提高了23.63%、30.31%、0、14.09%、19.74%和0。全负荷与较低的3个转速下电动增压介入后有效燃油消耗率(brake specific fuel consumption,BSFC)降低近10%,最高转速下废气涡轮增压完全取代电动增压;部分负荷下的两组工况内,电动增压介入后,最高BSFC降低了10.8%和8.4%。结论表明合理应用电增压促进最高废气再循环率可以提升发动机的燃油经济性并保持较高的动力性。展开更多
This study explores the potentials of employing an Organic Rankine Cycle (ORC) system with variable inlet guide vanes (VIV) turbine geometry designed on a GT-Suite platform for effective exhaust heat recovery (EHR) ap...This study explores the potentials of employing an Organic Rankine Cycle (ORC) system with variable inlet guide vanes (VIV) turbine geometry designed on a GT-Suite platform for effective exhaust heat recovery (EHR) application onboard passenger vehicles. The ORC model simulation was based on vehicle speed mode using R245fa as working fluid to assess the thermal performance of the ORC system when utilizing modified turbine geometry. Interestingly, the model achieved a very improved performance in contrast to the model without a modified turbine configuration. The results revealed the average 2.32 kW ORC net output, 4.93% thermal efficiency, 6.1% mechanical efficiency, and 5.0% improved brake specific fuel consumption (BSFC) for the developed model. As determined by the performance indicators, these promising results from the model study show the prospect of EHR technology application in the transportation sector for reduction in exhaust emissions and fuel savings.展开更多
文摘在一台1.5 L带废气涡轮增压的直喷汽油机上进行了电动增压和废气再循环(exhaust gas recirculation,EGR)协同对发动机动力性和经济性的影响规律试验研究。结果表明:全负荷下电动增压促进最高废气再循环率随转速的上升而下降,在4个试验转速下分别提升了17.7%、15.2%、13.84%和0;部分负荷下电动增压促进最高废气再循环率随负荷的提高与转速下降,在6个试验工况下最高废气再循环率分别被提高了23.63%、30.31%、0、14.09%、19.74%和0。全负荷与较低的3个转速下电动增压介入后有效燃油消耗率(brake specific fuel consumption,BSFC)降低近10%,最高转速下废气涡轮增压完全取代电动增压;部分负荷下的两组工况内,电动增压介入后,最高BSFC降低了10.8%和8.4%。结论表明合理应用电增压促进最高废气再循环率可以提升发动机的燃油经济性并保持较高的动力性。
文摘This study explores the potentials of employing an Organic Rankine Cycle (ORC) system with variable inlet guide vanes (VIV) turbine geometry designed on a GT-Suite platform for effective exhaust heat recovery (EHR) application onboard passenger vehicles. The ORC model simulation was based on vehicle speed mode using R245fa as working fluid to assess the thermal performance of the ORC system when utilizing modified turbine geometry. Interestingly, the model achieved a very improved performance in contrast to the model without a modified turbine configuration. The results revealed the average 2.32 kW ORC net output, 4.93% thermal efficiency, 6.1% mechanical efficiency, and 5.0% improved brake specific fuel consumption (BSFC) for the developed model. As determined by the performance indicators, these promising results from the model study show the prospect of EHR technology application in the transportation sector for reduction in exhaust emissions and fuel savings.
