The Examination of the Combustion Processes in a Compression-Ignition Engine by Changing the Partial Pressure of Oxygen in the Intake Charge

Karim, G. A.; Ward, G.

doi:10.4271/680767

Cited by 29 publications

(6 citation statements)

References 7 publications

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“…Some review of the literature on oxygen enrichment is provided by Ghojel et al and Desai et al In an early paper on oxygen enrichment, Karim and Ward used the variation of intake composition to study the relationship between the physical and chemical time scales in the direct injection compression ignition engine . They also observed greatly reduced smoke emissions, higher peak cylinder pressure, increased power out, and significantly shortened ignition delay with oxygen enrichment up to 55 vol % O 2 in the intake air.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

et al. 2004

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Among continuing efforts to develop low-emission combustion engines, oxygen-enhanced combustion has long been considered a promising approach. A number of investigations have focused on the effects of oxygen addition on soot formation and oxidation by using various oxygen introduction techniques, such as blending different oxygen-containing fuels or direct oxygen addition into the intake air stream. The present study of oxygen addition was performed on a Volkswagen 1.9 L “TDI” turbodiesel engine to investigate and compare the relative effect of two oxygen addition methods on diesel emission and combustion: oxygen enrichment of the intake air and oxygenation of the fuel. The oxygen enrichment was accomplished by connecting an oxygen generator to the intake air surge tank, while fuel oxygenation was accomplished using two compounds with different cetane number and molecular structure. The key observations are that both intake oxygen enrichment and fuel oxygenation via linear structure oxygenated molecules are effective for reduction of diesel particulate matter, yielding even greater reductions in PM emissions than for fuel oxygenation via ring-structured oxygenated molecules. However, NO x emissions are greatly increased with intake oxygen enrichment, owing to either increased availability of atomic oxygen or attainment of a higher temperature during leaner combustion, which enhances the kinetics for thermal NO x formation. Comparison between the addition of two substantially different oxygenated fuels, a mixture of glycol ethers and 1,3-dioxolane, has also shed light on the mechanisms of soot reduction via oxygen addition. With their linear structure, the glycol ethers were shown to be far more effective for soot reduction than an equivalent oxygen addition via dioxolane, which has a ring structure, despite no significant difference in heat release rate.

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Section: Introductionmentioning

confidence: 99%

Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

et al. 2004

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“…In recent years, many researchers have conducted experiments on oxygen enrichment of intake air in the diesel engine and proved that smoke emissions from the engine could be reduced when oxygen composition of intake air is increased [10][11][12].The research results of various investigators reported that the oxygen-enriched combustion in diesel engines shows significant reductions in smoke emissions, higher peak cylinder pressure, increased power output and significantly shortened ignition delay [13][14][15][16]. Byun et al [17] conducted experiments on the effect of oxygen enriched air obtained by gas separation membranes from the emission gas of diesel engines.…”

Section: Bio Fuel From Cnslmentioning

confidence: 96%

Effect of Oxygen Enrichment of Intake Air on the Performance and Emission of Single Cylinder CI Engine Fueled with Cardanol Blends

Dinesha

Mohanan

2015

Distributed Generation & Alternative Energy Journal

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In this study, the effect of intake air enrichment on the performance and emission characteristics of a single-cylinder direct-injection diesel engine fueled with non edible oil namely Cardanol-diesel-methanol blend (B20M10) are investigated. With increase of intake air oxygen concentration, CO and HC decreased while brake thermal efficiency and NO x considerably increased. The maximum Brake Thermal Efficiency of 33.98% is obtained for B20M10 with 7% oxygen enrichment of intake air. Maximum NO x emission 20% is obtained for B20M10 with 7% oxygen enrichment for the full load condition. Decreases of 20% and 14.5% in CO emission are obtained for B20M10, over B20M10 with 7% oxygen enrichment, where as 76.8% and 74% decrease in hydrocarbon emission is obtained over B20M10 without oxygen enrichment.

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“…Studies of the effects of O 2 -enrichment on both direct-injection (DI) and indirect-injection (IDI) diesel engines have been carried out with the objective of reducing smoke, particulates, hydrocarbons (HC), and carbon monoxide (CO) emissions (Karim and Ward 1968;Ghojel et al 1983;Watson et al 1990;Virk et al 1993). Most of these studies reveal significant reductions in exhaust emissions, with the exception of NO x emissions.…”

Section: Oxygen Enrichmentmentioning

confidence: 99%

Membrane-Based Air Composition Control for Light-Duty Diesel Vehicles: A Benefit and Cost Assessment

Stork¹,

Poola²

1998

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The Examination of the Combustion Processes in a Compression-Ignition Engine by Changing the Partial Pressure of Oxygen in the Intake Charge

Cited by 29 publications

References 7 publications

Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

Comparison of the Impact of Intake Oxygen Enrichment and Fuel Oxygenation on Diesel Combustion and Emissions

Effect of Oxygen Enrichment of Intake Air on the Performance and Emission of Single Cylinder CI Engine Fueled with Cardanol Blends

Membrane-Based Air Composition Control for Light-Duty Diesel Vehicles: A Benefit and Cost Assessment

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