Thermal efficiency improvement of a lean-boosted spark ignition engine by multidimensional simulation with detailed chemical kinetics

Ratnak Sok, Jin Kusaka, Yasuhiro Daisho, Kei Yoshimura, Kenjiro Nakama

研究成果: Article

3 引用 (Scopus)

抄録

This paper aims to improve thermal efficiency of spark ignition engine by numerical calculation with detailed chemistry. Experimental results from a four-stroke-single-cylinder engine are compared with that of simulations. It is experimentally found that peak efficiency is achieved at lean-limit combustion under excess air ratio λ=1.6. Due to engine output power loss, further investigations are conducted under lean-boost operations. The best condition of the lean-boost mode is at λ=1.3 and 150 kPa boosted pressure (abs). To further improve the efficiency without power loss, simulations are conducted under lean-boost combustion with dilution rate, high engine swirl, and high knock resistant fuel.

元の言語English
ページ(範囲)97-104
ページ数8
ジャーナルInternational Journal of Automotive Engineering
6
発行部数4
出版物ステータスPublished - 2015

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Internal combustion engines
Reaction kinetics
efficiency
simulation
Combustion knock
Engines
Engine cylinders
stroke
Dilution
chemistry
air
Air
Hot Temperature

ASJC Scopus subject areas

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

これを引用

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abstract = "This paper aims to improve thermal efficiency of spark ignition engine by numerical calculation with detailed chemistry. Experimental results from a four-stroke-single-cylinder engine are compared with that of simulations. It is experimentally found that peak efficiency is achieved at lean-limit combustion under excess air ratio λ=1.6. Due to engine output power loss, further investigations are conducted under lean-boost operations. The best condition of the lean-boost mode is at λ=1.3 and 150 kPa boosted pressure (abs). To further improve the efficiency without power loss, simulations are conducted under lean-boost combustion with dilution rate, high engine swirl, and high knock resistant fuel.",
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AU - Sok, Ratnak

AU - Kusaka, Jin

AU - Daisho, Yasuhiro

AU - Yoshimura, Kei

AU - Nakama, Kenjiro

PY - 2015

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N2 - This paper aims to improve thermal efficiency of spark ignition engine by numerical calculation with detailed chemistry. Experimental results from a four-stroke-single-cylinder engine are compared with that of simulations. It is experimentally found that peak efficiency is achieved at lean-limit combustion under excess air ratio λ=1.6. Due to engine output power loss, further investigations are conducted under lean-boost operations. The best condition of the lean-boost mode is at λ=1.3 and 150 kPa boosted pressure (abs). To further improve the efficiency without power loss, simulations are conducted under lean-boost combustion with dilution rate, high engine swirl, and high knock resistant fuel.

AB - This paper aims to improve thermal efficiency of spark ignition engine by numerical calculation with detailed chemistry. Experimental results from a four-stroke-single-cylinder engine are compared with that of simulations. It is experimentally found that peak efficiency is achieved at lean-limit combustion under excess air ratio λ=1.6. Due to engine output power loss, further investigations are conducted under lean-boost operations. The best condition of the lean-boost mode is at λ=1.3 and 150 kPa boosted pressure (abs). To further improve the efficiency without power loss, simulations are conducted under lean-boost combustion with dilution rate, high engine swirl, and high knock resistant fuel.

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KW - Heat engine

KW - Numerical calculation

KW - Spark ignition engine

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