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

School of Mechanical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 p_s=0.16 MPa, h_s=26 mm and EVO=48 mm.

Original language	English
Pages (from-to)	110-115
Number of pages	6
Journal	Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering
Volume	37
Issue number	6
DOIs	https://doi.org/10.13949/j.cnki.nrjgc.2016.06.018
Publication status	Published - 15 Dec 2016

Keywords

Delivery ratio
Free piston engine
IC engine
Scavenging
Trapping ratio

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10.13949/j.cnki.nrjgc.2016.06.018

Cite this

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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",

pages = "110--115",

journal = "Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering",

issn = "1000-0925",

publisher = "Chinese Society for Internal Combustion Engines",

number = "6",

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TY - JOUR

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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U2 - 10.13949/j.cnki.nrjgc.2016.06.018

DO - 10.13949/j.cnki.nrjgc.2016.06.018

M3 - Article

AN - SCOPUS:85009765342

SN - 1000-0925

VL - 37

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JO - Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering

JF - Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering

IS - 6

ER -

Scavenging design and optimization for hydraulic free piston diesel engine

Abstract

Keywords

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