Scavenging design and optimization for hydraulic free piston diesel engine

Shuan Lu Zhang; Chang Lu Zhao; Zhen Feng Zhao; Fu Jun Zhang

doi:10.13949/j.cnki.nrjgc.2016.06.018

Scavenging design and optimization for hydraulic free piston diesel engine

Shuan Lu Zhang, Chang Lu Zhao, Zhen Feng Zhao, Fu Jun Zhang

机械与车辆学院

Beijing Institute of Technology

科研成果: 期刊稿件 › 文章 › 同行评审

1 引用（Scopus）

摘要

The electro-hydraulic camless valve control strategy was developed based on the valve-intake port uniflow scavenging and the characteristics of a hydraulic free piston engine. Then the control strategy was verified by the experiment and the cylinder pressure and piston running curve were obtained at the same time, to determine the boundary conditions of the 3D CFD. Moreover, the influence of engine parameters, such as exhaust valve timing, intake port height and the inlet pressure, on delivery ratio, and trapping ratio and scavenging efficiency were analyzed by the simulation model established by the AVL_FIRE ENGINE PLUS. On this basis, an optimization function based on the scavenging efficiency, delivery ratio and trapping ratio was proposed. Finally, optimization result shows that the scavenging efficiency can reach 84.7% when the boundary conditions are satisfied with p_s=0.16 MPa, h_s=26 mm and EVO=48 mm.

源语言	英语
页（从-至）	110-115
页数	6
期刊	Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering
卷	37
期	6
DOI	https://doi.org/10.13949/j.cnki.nrjgc.2016.06.018
出版状态	已出版 - 15 12月 2016

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title = "Scavenging design and optimization for hydraulic free piston diesel engine",

abstract = "The electro-hydraulic camless valve control strategy was developed based on the valve-intake port uniflow scavenging and the characteristics of a hydraulic free piston engine. Then the control strategy was verified by the experiment and the cylinder pressure and piston running curve were obtained at the same time, to determine the boundary conditions of the 3D CFD. Moreover, the influence of engine parameters, such as exhaust valve timing, intake port height and the inlet pressure, on delivery ratio, and trapping ratio and scavenging efficiency were analyzed by the simulation model established by the AVL_FIRE ENGINE PLUS. On this basis, an optimization function based on the scavenging efficiency, delivery ratio and trapping ratio was proposed. Finally, optimization result shows that the scavenging efficiency can reach 84.7% when the boundary conditions are satisfied with ps=0.16 MPa, hs=26 mm and EVO=48 mm.",

keywords = "Delivery ratio, Free piston engine, IC engine, Scavenging, Trapping ratio",

author = "Zhang, {Shuan Lu} and Zhao, {Chang Lu} and Zhao, {Zhen Feng} and Zhang, {Fu Jun}",

year = "2016",

month = dec,

day = "15",

doi = "10.13949/j.cnki.nrjgc.2016.06.018",

language = "English",

volume = "37",

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issn = "1000-0925",

publisher = "Chinese Society for Internal Combustion Engines",

number = "6",

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T1 - Scavenging design and optimization for hydraulic free piston diesel engine

AU - Zhang, Shuan Lu

AU - Zhao, Chang Lu

AU - Zhao, Zhen Feng

AU - Zhang, Fu Jun

PY - 2016/12/15

Y1 - 2016/12/15

N2 - The electro-hydraulic camless valve control strategy was developed based on the valve-intake port uniflow scavenging and the characteristics of a hydraulic free piston engine. Then the control strategy was verified by the experiment and the cylinder pressure and piston running curve were obtained at the same time, to determine the boundary conditions of the 3D CFD. Moreover, the influence of engine parameters, such as exhaust valve timing, intake port height and the inlet pressure, on delivery ratio, and trapping ratio and scavenging efficiency were analyzed by the simulation model established by the AVL_FIRE ENGINE PLUS. On this basis, an optimization function based on the scavenging efficiency, delivery ratio and trapping ratio was proposed. Finally, optimization result shows that the scavenging efficiency can reach 84.7% when the boundary conditions are satisfied with ps=0.16 MPa, hs=26 mm and EVO=48 mm.

AB - The electro-hydraulic camless valve control strategy was developed based on the valve-intake port uniflow scavenging and the characteristics of a hydraulic free piston engine. Then the control strategy was verified by the experiment and the cylinder pressure and piston running curve were obtained at the same time, to determine the boundary conditions of the 3D CFD. Moreover, the influence of engine parameters, such as exhaust valve timing, intake port height and the inlet pressure, on delivery ratio, and trapping ratio and scavenging efficiency were analyzed by the simulation model established by the AVL_FIRE ENGINE PLUS. On this basis, an optimization function based on the scavenging efficiency, delivery ratio and trapping ratio was proposed. Finally, optimization result shows that the scavenging efficiency can reach 84.7% when the boundary conditions are satisfied with ps=0.16 MPa, hs=26 mm and EVO=48 mm.

KW - Delivery ratio

KW - Free piston engine

KW - IC engine

KW - Scavenging

KW - Trapping ratio

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Scavenging design and optimization for hydraulic free piston diesel engine

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