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Simulation of novel independent compression freepiston engine


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Simulation of novel independent compression freepiston engine
Lin JimingXu ZhaopingChang Siqin
School of Mechanical Engineering,NUST,Nanjing 210094,China
freepiston enginesworking cyclepressurizationsimulation
In order to improve the performance of a fourstroke freepiston engine,a working cycle combined intake air independent compressed process with thermodynamic parameter controlled process is proposed here.A MATLAB/Simulink model is built up to analyse dynamic performances of the engine.The effects of intake pressures,ignition positions and lengths of expansion stroke on the engine are qualitatively analyzed.The simulation results show that the intake and compression processes change from serial to parallel,which shortens the intake and compression stroke,improves the efficiency and power of the system.Increasing the ignition position and compression ratio has a limited role on improving effective efficiency of the system.The operating load of the exhaust valve reduces by extending the expansion stroke.This model provides theoretical guidance for the improvement and test of the prototype.


[1]Shoukry E F,Taylor S,Clark N.Numerical simulation for parametric study of a twostroke direct injection linear engine[A].SAE 2002 World Congress[C].Warrendale,USA:SAE,2002:2002-01-1739.
[2]Blarigan V P.Advanced internal combustion engine research[A].Proceedings of the 2000 DOE Hydrogen Program Review[C].Livemore,USA:U.S.Department of Energy,2000:NREL/CP-570-28890.
[3]Kleemann A P,Dabadie J C,Henriot S.Computational design studies for a highefficiency and lowemissions free piston engine prototype[A].SAE 2004 World Congress[C].Warrendale,USA:SAE,2004:2004-01-2928.
[4]李庆峰,朱皓月,肖进,等.自由活塞式内燃发电机振动特性[J].内燃机学报,2009,27(4):370-374. Li Qingfeng,Zhu Haoyue,Xiao Jin,et al.Oscillation characteristic of a free piston linear alternator[J].Transactions of Chinese Society for Internal Combustion Engines,2009,27(4):370-374.
[5]王哲,叶晓倩,邓俊.基于MATLAB/Simulink的直线发动机性能仿真研究[J].内燃机工程,2009,30(1):69-73. Wang Zhe,Ye Xiaoqian,Deng Jun.A simulation analysis on freepiston engine based on MATLAB/Simulink[J].Chinese Internal Combustion Engine Engineering,2009,30(1):69-73.
[6]Mao J L,Zuo Z X,Li W,et al.Multidimensional scavenging analysis of a freepiston linear alternator based on numerical simulation[J].Applied Energy,2011,88(4):1140-1152.
[7]常思勤,徐照平.内燃-直线发电集成动力系统概念设计[J].南京理工大学学报,2008,32(4):449-452. Chang Siqin,Xu Zhaoping.Conceptual design of internal combustionlinear generator integrated power system[J].Journal of Nanjing University of Science and Technology,2008,32(4):449-452.
[8]徐照平.内燃-直线发电集成动力系统的关键技术研究及其系统实现[D].南京:南京理工大学机械工程学院,2010. Xu Zhaoping.Research on internal combustionlinear generator integrated power system and its implementation[D].Nanjing:School of Mechanical Engineering,Nanjing University of Science and Technology,2010.
[9]常思勤,刘梁,李子非,等.一种发动机电磁驱动配气机构应用研究[J].南京理工大学学报,2011,35(5):585-589. Chang Siqin,Liu Liang,Li Zifei,et al.Application of engine electromagnetic actuated valvetrain[J].Journal of Nanjing University of Science and Technology,2011,35(5):585-589.


Last Update: 2013-02-15