A Potentiality of dedicated EGR system for improving thermal efficiency in natural gas SI engines

Sejun Lee; Kyohei Ozaki; Takahiro Sako; Norimasa Iida

doi:10.20485/jsaeijae.6.1_15

A Potentiality of dedicated EGR system for improving thermal efficiency in natural gas SI engines

Sejun Lee, Kyohei Ozaki, Takahiro Sako, Norimasa Iida

Department of System Design Engineering

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

1 Citation (Scopus)

Abstract

Object of this study is to realize improving thermal efficiency and emission reduction with low temperature combustion. EGR is a solution to low temperature combustion, however it occurs burning velocity decrease. To prevent this phenomenon, Dedicated EGR was adjusted to SI engine run by natural gas. The entire exhaust gas of a single cylinder operated by the equivalence ratio varied from lean to rich was recirculated to the other cylinders. Due to H₂ and CO included in EGR, slowed burning velocity problem was overcome with increasing degree of constant volume, thus thermal efficiency could be improved.

Original language	English
Pages (from-to)	15-22
Number of pages	8
Journal	International Journal of Automotive Engineering
Volume	6
Issue number	1
DOIs	https://doi.org/10.20485/jsaeijae.6.1_15
Publication status	Published - 2015

Keywords

Exhaust gas recirculation
Heat engine
Laminar burning velocity
Low temperature combustion
Numerical calculation
Spark ignition engine
Thermal efficiency [A1]

ASJC Scopus subject areas

Human Factors and Ergonomics
Automotive Engineering
Safety, Risk, Reliability and Quality
Fluid Flow and Transfer Processes

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10.20485/jsaeijae.6.1_15

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title = "A Potentiality of dedicated EGR system for improving thermal efficiency in natural gas SI engines",

abstract = "Object of this study is to realize improving thermal efficiency and emission reduction with low temperature combustion. EGR is a solution to low temperature combustion, however it occurs burning velocity decrease. To prevent this phenomenon, Dedicated EGR was adjusted to SI engine run by natural gas. The entire exhaust gas of a single cylinder operated by the equivalence ratio varied from lean to rich was recirculated to the other cylinders. Due to H2 and CO included in EGR, slowed burning velocity problem was overcome with increasing degree of constant volume, thus thermal efficiency could be improved.",

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author = "Sejun Lee and Kyohei Ozaki and Takahiro Sako and Norimasa Iida",

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year = "2015",

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language = "English",

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AU - Lee, Sejun

AU - Ozaki, Kyohei

AU - Sako, Takahiro

AU - Iida, Norimasa

PY - 2015

Y1 - 2015

N2 - Object of this study is to realize improving thermal efficiency and emission reduction with low temperature combustion. EGR is a solution to low temperature combustion, however it occurs burning velocity decrease. To prevent this phenomenon, Dedicated EGR was adjusted to SI engine run by natural gas. The entire exhaust gas of a single cylinder operated by the equivalence ratio varied from lean to rich was recirculated to the other cylinders. Due to H2 and CO included in EGR, slowed burning velocity problem was overcome with increasing degree of constant volume, thus thermal efficiency could be improved.

AB - Object of this study is to realize improving thermal efficiency and emission reduction with low temperature combustion. EGR is a solution to low temperature combustion, however it occurs burning velocity decrease. To prevent this phenomenon, Dedicated EGR was adjusted to SI engine run by natural gas. The entire exhaust gas of a single cylinder operated by the equivalence ratio varied from lean to rich was recirculated to the other cylinders. Due to H2 and CO included in EGR, slowed burning velocity problem was overcome with increasing degree of constant volume, thus thermal efficiency could be improved.

KW - Exhaust gas recirculation

KW - Heat engine

KW - Laminar burning velocity

KW - Low temperature combustion

KW - Numerical calculation

KW - Spark ignition engine

KW - Thermal efficiency [A1]

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A Potentiality of dedicated EGR system for improving thermal efficiency in natural gas SI engines

Abstract

Keywords

ASJC Scopus subject areas

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