Trial of New Concept Diesel Combustion System - Premixed Compression-Ignited Combustion -

Iwabuchi, Yoshinori; Kawai, Kenji; Shoji, Takeshi; Takeda, Yoshinaka

doi:10.4271/1999-01-0185

Cited by 243 publications

(93 citation statements)

References 1 publication

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“…Recent studies [5,6,7,8,9,10,11,12,13,14,15,16,17,18] reported that GCI combustion occurs as a series of autoignition events with minor contributions from the flame fronts. This is usually achieved by controlling the autoignition timing by manipulating equivalence ratio stratification levels within the cylinder through late injection in the compression stroke, in contrast to homogeneous charge compression ignition (HCCI) [19,20,21,22] and premixed ignition [23,24] engines where the fuel and air are fully mixed prior to entering the combustion chamber. The enabling fuel for such GCI combustion is lesser processed, compared to commercial gasoline and diesel fuels, refinery streams such as, petroleum naphtha with octane numbers (RON) in the 50-80 range.…”

Section: Introductionmentioning

confidence: 99%

Effects of In-Cylinder Mixing on Low Octane Gasoline Compression Ignition Combustion

Badra

Elwardany

Sim

et al. 2016

SAE Technical Paper Series

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Gasoline compression ignition (GCI) engines have been considered an attractive alternative to traditional spark ignition engines. Low octane gasoline fuel has been identified as a viable option for the GCI engine applications due to its longer ignition delay characteristics compared to diesel and in the volatility range of gasoline fuels. In this study, we have investigated the effect of different injection timings at part-load conditions using light naphtha stream in single cylinder engine experiments in the GCI combustion mode with injection pressure of 130 bar. A toluene primary reference fuel (TPRF) was used as a surrogate for the light naphtha in the engine simulations performed here. A physical surrogate based on the evaporation characteristics of the light naphtha has been developed and its properties have been implemented in the engine simulations. Full cycle GCI computational fluid dynamics (CFD) engine simulations have been successfully performed while changing the start of injection (SOI) timing from -50° to -11 ° CAD aTDC. The effect of SOI on mixing and combustion phasing was investigated using detailed equivalence ratio-temperature maps and ignition delay times. Both experimental and computational results consistently showed that an SOI of -30° CAD aTDC has the most advanced combustion phasing (CA50), with the highest NOx emission. The effects of the SOI on the fuel containment in the bowl of the piston, the ignition delay time, combustion rate and emissions have been carefully examined through the CFD calculations. It was found that the competition between the equivalence ratio and temperature is the controlling parameter in determining the combustion phasings.

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Section: Introductionmentioning

confidence: 99%

Effects of In-Cylinder Mixing on Low Octane Gasoline Compression Ignition Combustion

Badra

Elwardany

Sim

et al. 2016

SAE Technical Paper Series

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“…The current and emerging after-treatment technologies give encouraging results, but their cost and complexity threaten the competitiveness of the Diesel engine package. Conversely, over the past decade, research in Diesel homogeneous charge combustion has highlighted an alternative approach for significant engine out reductions of nitrogen oxides (NOx) and Particulate Matter (PM) emissions [1][2][3][4][5][6][7][8][9]. Importantly, it demonstrates the capability of simultaneously reducing NOx and PM emissions, thus potentially offering an extended use of Diesel engines without, or with greatly reduced, after-treatment requirements.…”

Section: Introductionmentioning

confidence: 99%

The effect of compression ratio on exhaust emissions from a PCCI diesel engine

Laguitton¹,

Crua²,

Cowell³

et al. 2007

Energy Conversion and Management

117

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A description of the development of a single cylinder test facility is presented, being based on a production 4-cylinder DI Diesel engine and designed to allow study of the emissions characteristics over a very wide range of operating conditions. The objective was to establish how engine out NO x emissions can be reduced to the estimated levels required by the next emissions target "Euro 6" and thus be able to apply the findings to the original 4-cylinder engine and minimise the requirement for currently immature NOx after treatment. It has been proposed that further reduction in compression ratio beyond current levels would be beneficial to engine out emissions and specific power, and could be facilitated by developments in cold start technology. The results of a study using this single cylinder facility to evaluate the effect of reducing compression ratio from 18.4 to 16.0 are presented. It was found that, although there was a small CO and HC penalty, either reducing the compression ratio or retarding the injection timing greatly reduced NOx and soot emissions when both premixed and diffusion-combustion phases were present. This effect was less significant when the combustion was solely premixed.

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“…Premixed Charge Compression Ignition (PCCI), or Premixed Compression Ignition (PCI), as it is sometimes referred to, has emerged as an interesting alternative to conventional Diesel combustion in the part-load operating range [17, 24,41]. This concept involves relatively early injection timings, high external EGR rates, and cooled intake air, leading to a Low-Temperature Combustion (LTC) process with low NO x and particulate emissions.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Simulation Strategy for PCCI Combustion Control Design

Peters

Hoffmann

Felsch

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Méthode de développement de lois de commande pour la combustion PCCI basée sur la simulation système -Cet article présente une méthodologie de développement de lois de commande pour la combustion PCCI. La méthode proposée repose sur l'utilisation d'un simulateur du moteur dont le niveau de représentation est adapté aux besoins de l'application ciblée. Le simulateur proposé repose sur l'association d'un modèle de combustion multidimensionnel (pour la partie haute pression du cycle moteur) et d'un modèle à valeurs moyennes (pour la description des d'échanges gazeux). L'association des caractéristiques de ces modèles permet d'aboutir à un niveau de représen-tation suffisamment précis pour accompagner le développement de lois de commande. De plus, les simplifications réalisées permettent des gains conséquents en termes de temps de simulation. Cet article propose aussi une simplification supplémentaire en introduisant une méthode d'identification d'un modèle de Wiener. Les résultats présentés dans cette publication sont le fruit des travaux du centre de recherche « SFB 686 -Modellbasierte Regelung der homogenisierten Niedertemperatur-Verbrennung » de l'Université RWTH d'Aix-la-Chapelle et de l'Université de Bielefeld en Allemagne. Abstract -A Dynamic Simulation Strategy for PCCI Combustion Control Design -Subject of this work is a dynamic simulation strategy for PCCI combustion that can be used in closed-loop control development. A detailed multi-zone chemistry model for the high-pressure part of the engine cycle is

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Trial of New Concept Diesel Combustion System - Premixed Compression-Ignited Combustion -

Cited by 243 publications

References 1 publication

Effects of In-Cylinder Mixing on Low Octane Gasoline Compression Ignition Combustion

Effects of In-Cylinder Mixing on Low Octane Gasoline Compression Ignition Combustion

The effect of compression ratio on exhaust emissions from a PCCI diesel engine

A Dynamic Simulation Strategy for PCCI Combustion Control Design

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