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Journal ArticleDOI

Effects of Exhaust Gas Recirculation and Boost Pressure on Reactivity Controlled Compression Ignition Engine at High Load Operating Conditions

01 May 2015-Journal of Energy Resources Technology-transactions of The Asme (American Society of Mechanical Engineers)-Vol. 137, Iss: 3, pp 032210
About: This article is published in Journal of Energy Resources Technology-transactions of The Asme.The article was published on 2015-05-01. It has received 35 citations till now. The article focuses on the topics: Exhaust gas recirculation & Carbureted compression ignition model engine.
Citations
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Journal ArticleDOI
TL;DR: A detailed review on the state-of-the-art of RCCI combustion has been presented in this paper, including the up-to-date research progress, including the use of alternative fuels and cetane number improvers, and the effects of fuel ratio, different injection strategies, EGR rate, CR and bowl geometry on engine performance and emissions formation.
Abstract: RCCI (reactivity controlled compression ignition) engines are found to be capable of achieving higher thermal efficiency and ultra-low NOx and PM emissions. The reactivity controlled combustion is accomplished by creating reactivity stratification in the cylinder with the use of two fuels characterized by distinctly different cetane numbers. The low reactivity (i.e., low cetane number) fuel is firstly premixed with air and then charged into the cylinder through the intake manifold; later, the high reactivity (i.e., high cetane number) fuel is injected into the charged mixture through a direct injector. Subsequently, the reactivity stratification is formed. By strategically adjusting the ratio of two fuels and injection timings, the produced reactivity gradient is able to control the combustion phasing and mitigate the pressure rise rate, as well as the heat release rate. Alternatively, structural factors such as CR (compression ratio) and piston bowl geometries can also affect the combustion characteristics of RCCI. Besides the engine management, the fuels that could be utilized in RCCI engines are also crucial to determine the evaporation, mixing, and combustion processes. To gain a comprehensive knowledge on the state-of-the-art of RCCI combustion, detailed review on the management of RCCI engines has been presented in this paper. This review covers the up-to-date research progress of RCCI including the use of alternative fuels and cetane number improvers, and the effects of fuel ratio, different injection strategies, EGR rate, CR and bowl geometry on engine performance and emissions formation. Moreover, the controllability issues are addressed in this article.

159 citations

Journal ArticleDOI
TL;DR: Low-temperature combustion is an emerging engine technology that has the ability to yield low NOx and soot emissions while maintaining high fuel efficiency as discussed by the authors, and it has been shown that low temperature combustion strategies can reduce SOI and NOx emissions.
Abstract: Low-temperature combustion is an emerging engine technology that has the ability to yield low NOx and soot emissions while maintaining high fuel efficiency. Low-temperature combustion strategies in...

150 citations


Cites background from "Effects of Exhaust Gas Recirculatio..."

  • ...Studies are currently ongoing to explore factors that affect the ability to achieve RCCI combustion over a wide range of speed and load points.(221) The effects of piston bowl design, piston material, CR and injection strategy are being considered....

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Journal ArticleDOI
TL;DR: In this paper, advanced combustion control strategies have been experimentally investigated to improve ethanol-diesel dual-fuel operation at a high engine load of 1.8 MPa net indicated mean effective pressure.

43 citations

Journal ArticleDOI
TL;DR: In this article, the effect of cooled exhaust gas recirculation (EGR) on emission reduction was evaluated on a modified single cylinder light duty diesel engine to run on high pressure common rail direct fuel injection.

36 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of two key injection parameters, namely dwell and split fraction, are numerically investigated in a gasoline and biodiesel fueled RCCI engine, where gasoline is used as the premixed fuel; meanwhile, biodiesel is directly injected into the air-fuel mixture.

31 citations

References
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Journal ArticleDOI
TL;DR: In this article, the RNG κ-e turbulence model derived by Yakhot and Orszag (1986) based on the Renormalization Group theory has been modified and applied to variable-density engine flows in the present study.
Abstract: The RNG κ-e turbulence model derived by Yakhot and Orszag (1986) based on the Renormalization Group theory has been modified and applied to variable-density engine flows in the present study. The original RNG-based turbulence transport approximations were developed formally for an incompressible flow. In order to account for flow compressibility the RNG e-equation is modified and closed through an isotropic rapid distortion analysis. Computations were made of engine compressing/expanding flows and the results were compared with available experimental observations in a production diesel engine geometry. The modified RNG κ-e model was also applied to diesel spray combustion computations. It is shown that the use of the RNG model is warranted for spray combustion modeling since the ratio of the turbulent to mean-strain time scales is appreciable due to spray-generated mean flow gradients, and the model introduces a term to account for these effects. Large scale flow structures are predicted which ar...

1,200 citations

Journal ArticleDOI
TL;DR: A comprehensive review of the physical phenomena governing homogeneous charge compression ignition (HCCI) operation, with particular emphasis on high load conditions, is provided in this paper, with suggestions on how to inexpensively enable low emissions of all regulated emissions.

481 citations

Journal ArticleDOI
TL;DR: In this article, a reduced chemical kinetic mechanism for the oxidation of primary reference fuel (PRF) has been developed and applied to model internal combustion engines, which gives reliable performance for combustion predictions, as well as computational efficiency improvements for multidimensional CFD simulations.

401 citations