IFP Energies Nouvelles Approach for Dual Fuel Diesel-Gasoline Engines

Duffour, Florence; Ternel, Cyprien; Pagot, Alexandre

doi:10.4271/2011-24-0065

Cited by 18 publications

(7 citation statements)

References 14 publications

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“…In most studies of RCCI combustion, particle emissions have been evaluated by measuring the filter smoke number (FSN). [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] FSN is an optical measurement based on the reflectance of filter paper through which a given volume of raw exhaust has passed. 27 Reduction in reflectance by light-absorbing soot is correlated to mass concentration, which is not intended to include volatile PM.…”

Section: (Left)mentioning

confidence: 99%

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Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine

Storey

Curran

Lewis

et al. 2016

International Journal of Engine Research

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Low-temperature compression ignition combustion can result in nearly smokeless combustion, as indicated by a smoke meter or other forms of soot measurement that rely on absorbance due to elemental carbon content. Highly premixed low-temperature combustion modes do not form particulate matter in the traditional pathways seen with conventional diesel combustion. Previous research into reactivity controlled compression ignition particulate matter has shown, despite a near zero smoke number, significant mass can be collected on filter media used for particulate matter certification measurement. In addition, particulate matter size distributions reveal that a fraction of the particles survive heated double-dilution conditions. This study summarizes research completed at Oak Ridge National Laboratory to date on characterizing the nature, chemistry and aftertreatment considerations of reactivity controlled compression ignition particulate matter and presents new research highlighting the importance of injection strategy and fuel composition on reactivity controlled compression ignition particulate matter formation. Particle size measurements and the transmission electron microscopy results do show the presence of soot particles; however, the elemental carbon fraction was, in many cases, within the uncertainty of the thermal-optical measurement. Particulate matter emitted during reactivity controlled compression ignition operation was also collected with a novel sampling technique and analyzed by thermal desorption or pyrolysis gas chromatography mass spectroscopy. Particulate matter speciation results indicated that the high boiling range of diesel hydrocarbons was likely responsible for the particulate matter mass captured on the filter media. To investigate potential fuel chemistry effects, either ethanol or biodiesel were incorporated to assess whether oxygenated fuels may enhance particle emission reduction.

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Section: (Left)mentioning

confidence: 99%

“…Figure18. Speciation results for semi-volatile hydrocarbons with three fuel combinations for 2300 r/min, 4.2 bar BMEP, suggesting greater emission of diesel-associated compounds.…”

mentioning

confidence: 99%

Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine

Storey

Curran

Lewis

et al. 2016

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…Instead of using a spark plug for ignition, the premixed air-gas mixture is ignited with a small amount of directly injected Diesel fuel. Combustion in dual-fuel engines has been studied by various researchers, see for example [5][6][7][8][9][10][11].…”

Section: Dual-fuel Natural Gas-diesel Enginementioning

confidence: 99%

“…In the natural gas-Diesel engine combustion phasing and combustion noise are very sensitive to the start of injection [5,6]. The start of combustion depends on the injection time and on the ignition delay of the Diesel fuel.…”

Section: Engine Controlmentioning

confidence: 99%

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

2013

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Abstract:In this paper we demonstrate the potential of combining electric hybridization with a dual-fuel natural gas-Diesel engine. We show that carbon dioxide emissions can be reduced to 43 gram per kilometer with a subcompact car on the New European Driving Cycle (NEDC). The vehicle is operated in charge-sustaining mode, which means that all energy is provided by the fuel. The result is obtained by hardware-in-the-loop experiments where the engine is operated on a test bench while the rest of the powertrain as well as the vehicle are simulated. By static engine measurements we demonstrate that the natural gas-Diesel engine reaches efficiencies of up to 39.5%. The engine is operated lean at low loads with low engine out nitrogen oxide emissions such that no nitrogen oxide aftertreatment is necessary. At medium to high loads the engine is operated stoichiometrically, which enables the use of a cost-efficient three-way catalytic converter. By vehicle emulation of a non-hybrid vehicle on the Worldwide harmonized Light vehicles Test Procedure (WLTP), we demonstrate that transient operation of the natural gas-Diesel engine is also possible, thus enabling a non-hybridized powertrain as well.

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“…Using a HSDI engine to evaluate the 99 concept all over the operating range, experiments highlight promising results at part load, 100 but important issues with smoke emissions and in-cylinder maximum pressure gradients 101 at high load operation [19]. In addition, using a HD Diesel engine, experimental work 102 focused on extending the operating range of the concept resulted in high efficiency and 103 clean combustion.…”

Section: Introduction 39mentioning

confidence: 99%

Operating range extension of RCCI combustion concept from low to full load in a heavy-duty engine

et al. 2015

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ElsevierMolina Alcaide, SA.; García Martínez, A.; Pastor Enguídanos, JM.; Belarte Mañes, E.; Balloul, I. (2015). Operating range extension of RCCI combustion concept from low to full load in a heavy-duty engine. Applied Energy. 143:211-227. doi:10.1016/j.apenergy.2015.01.035. overlimit function is used to select the best engine settings for each operating point. 23Finally, engine emissions and performance results from that RCCI operation are 24 compared with conventional Diesel combustion (CDC). 25Results suggest that double injection strategies should be used for RCCI operation from 26 low to mid load. However, from high to full load operation, single injection strategies 27 should be used, mainly to avoid excessive in-cylinder pressure gradients. In addition, it 28 is confirmed the suitability of RCCI combustion to overcome the soot-NOx trade-off 29 characteristic of CDC, from 6 to 24 bar of BMEP, while improving fuel consumption. 30

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IFP Energies Nouvelles Approach for Dual Fuel Diesel-Gasoline Engines

Cited by 18 publications

References 14 publications

Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine

Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine

Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

Operating range extension of RCCI combustion concept from low to full load in a heavy-duty engine

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