马赫阳，李向荣，杨伟，刘福水.OP2S柴油机气口参数的多目标优化研究[J].内燃机工程,2018,39(2):74-80.
OP2S柴油机气口参数的多目标优化研究
Multi Objective Optimization of Port Parameters in an Opposed Piston Two Stroke Diesel Engine
DOI：
关键词:内燃机  对置活塞二冲程  扫气  多目标优化
Key Words:IC engine  opposed piston two stroke  scavenging  multi objective optimization
基金项目:
作者单位
马赫阳，李向荣，杨伟，刘福水 1.北京理工大学 机械与车辆学院发动机研究所，北京 100081；2.北京理工大学 高效低排放内燃机技术工业和信息化部重点实验室，北京 100081 
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摘要:通过建立GT-Power仿真模型，分析了不同进、排气口高度及宽度对对置活塞二冲程（OP2S）柴油机动力性和换气性能的影响规律。采用多目标优化方法，在不同转速下优化了OP2S柴油机的平均指示压力、扫气效率和捕获率，并综合评价了OP2S柴油机的动力性和换气性能。研究表明，最优进、排气口高度随着转速的增加而增大，并且与固定气口高度相比，采用可变气口高度可使平均指示压力明显提高，说明在OP2S柴油机中采用可变气口高度技术实现可变配气相位对性能的提高具有重要意义。
Abstract:A GT-Power model was established to analyze the influence of intake and exhaust port heights on power and scavenging performances of an opposed piston two-stroke（OP2S) diesel engine. A multi-objective optimization method was used to optimize IMEP, scavenging efficiency and trapping ratio at different speeds and to evaluate the power and scavenging performance of the diesel engine. Results show that the optimal intake and exhaust port heights increase with a rise in speed, and compared with the fixed port height, the use of variable port height according to specific speed can increase IMEP. So using variable port height system to achieve VVT can greatly improve the comprehensive performance of the OP2S diesel engine.
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