Ozone Seeding Effect on the Ignition Event in HCCI Combustion of Gasoline-Ethanol Blends

Truedsson, Ida; Rousselle, Christine; Foucher, Fabrice

doi:10.4271/2017-01-0727

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…[9][10][11] The O 3 addition has been utilized to control the ignition timing in homogeneous charge compression ignition (HCCI) engines where hydrocarbons are premixed in the cylinder and the ignition of the hydrocarbons is enhanced by the reaction with the O-radicals produced via the ozone decomposition. [12][13][14][15] The ignition enhancement effects due to the O 3 addition have also been utilized in gasoline compression ignition (GCI) engines employing a two-stage direct injection strategy, in which the first injection is implemented before the O 3 decomposition to make the first injected fuel react with the O-radicals, and the ignition delay of the second injection is controlled by the temperature increase and the chemical species generated due to the first fuel injection. 9,16,17 Nishida et al 18 introduced O 3 into the intake air together with natural gas and injected diesel fuel directly into the cylinder near top dead center.…”

Section: Introductionmentioning

confidence: 99%

“…That report showed that an O 3 concentration of 1000 ppm or more was needed to enhance the ignition. 18 This O 3 concentration is considerably higher than that used to enhance the combustion of premixed gasoline components, that is less than 100 ppm, 10,11,[15][16][17] and considerable energy amounts are consumed to generate the O 3 concentration above 1000 ppm. 19 The differences in the required O 3 concentration between the gasoline components and the natural gas would suggest that the oxidation reactions of larger hydrocarbons are more likely to be affected by the O-radicals.…”

Section: Introductionmentioning

confidence: 99%

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Improvements in thermal efficiency and exhaust emissions with ozone addition in a natural gas-diesel dual fuel engine

Kobashi

Inagaki

Shibata

et al. 2023

International Journal of Engine Research

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Here, ozone (O3) was introduced into the intake air in a natural gas fueled engine ignited by diesel fuel, a natural gas–diesel dual fuel engine, to utilize the reactive O-radicals decomposed from the O3 for the promotion of the ignition and for improvements in the thermal efficiency and exhaust emissions. The engine experiments were performed over a range of equivalence ratios of the natural gas in a single cylinder engine. The timing of the pilot injection of the diesel fuel was varied from early in the compression stroke to near top dead center to examine the changes in the effects of the O3 addition on the ignition and combustion with the pilot injection timing while varying the O3 concentration. The results showed that the combination of the O3 addition and the early pilot injection is a means to improve the thermal efficiency and unburned emissions with a small amount of O3. Further, the improvement in the thermal efficiency and the reduction of the unburned hydrocarbons with the O3 addition are more pronounced for lower equivalence ratios of natural gas, while the O3 addition has a limited effect on the thermal efficiency and the unburned hydrocarbons for higher equivalence ratios of the natural gas.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvements in thermal efficiency and exhaust emissions with ozone addition in a natural gas-diesel dual fuel engine

Kobashi

Inagaki

Shibata

et al. 2023

International Journal of Engine Research

View full text Add to dashboard Cite

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“…In addition, low combustion temperature can also cause incomplete conversion of fuel to CO2, thereby reducing efficiency and increasing CO and HC emissions. To solve these shortcomings, a large number of combustion control strategies have been proposed and examined both experimentally and numerically that can be organized into four main categories including variable compression ratio [16][17], variable intake conditions [18][19][20], regulated Exhaust Gas Recirculation (EGR) [21][22][23][24] and adjustable fuel blends [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…To solve these shortcomings, a large number of combustion control strategies have been proposed and examined both experimentally and numerically that can be organized into four main categories including variable compression ratio, 16,17 variable intake conditions, 18–20 regulated Exhaust Gas Recirculation (EGR), 21–24 and adjustable fuel blends. 25–27…”

Section: Introductionmentioning

confidence: 99%

A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime

Mobasheri

Aïtouche

Peng

et al. 2021

International Journal of Engine Research

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The European Union (EU) has recently adopted new directives to reduce the level of pollutant emissions from non-road mobile machinery engines. The main scope of project RIVER for which this study is relating is to develop possible solutions to achieve nitrogen-free combustion and zero-carbon emissions in diesel engines. RIVER aims to apply oxy-fuel combustion with Carbon Capture and Storage (CCS) technology to eliminate NOx emissions and to capture and store carbon emissions. As part of this project, a computational fluid dynamic (CFD) analysis has been performed to investigate the effects of oxy-fuel combustion on combustion characteristics and engine operating conditions in a diesel engine under Homogenous Charge Compression Ignition (HCCI) mode. A reduced chemical n-heptane-n-butanol-PAH mechanism which consists of 76 species and 349 reactions has been applied for oxy-fuel HCCI combustion modeling. Different diluent strategies based on the volume fraction of oxygen and a diluent gas has been considered over a wide range of air-fuel equivalence ratios. Variation in the diluent ratio has been achieved by adding different percentages of carbon dioxide for a range from 77 to 83 vol.% in the intake charge. Results show that indicated thermal efficiency (ITE) has reduced from 32.7% to 20.9% as the CO2 concentration has increased from 77% to 83% at low engine loads while it doesn’t bring any remarkable change at high engine loads. It has also found that this technology has brought CO and PM emissions to a very ultra-low level (near zero) while NOx emissions have been completely eliminated.

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Combustion Control Variables and Strategies

Maurya

2017

Mechanical Engineering Series

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Ozone Seeding Effect on the Ignition Event in HCCI Combustion of Gasoline-Ethanol Blends

Cited by 10 publications

References 24 publications

Improvements in thermal efficiency and exhaust emissions with ozone addition in a natural gas-diesel dual fuel engine

Improvements in thermal efficiency and exhaust emissions with ozone addition in a natural gas-diesel dual fuel engine

A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime

Combustion Control Variables and Strategies

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