In-Cylinder Fuel Blending of Gasoline/Diesel for Improved Efficiency and Lowest Possible Emissions on a Multi-Cylinder Light-Duty Diesel Engine

Curran, Scott; Prikhodko, Vitaly Y.; Cho, Kukwon; Sluder, C. Scott; Parks, James E.; Wagner, R. M.; Kokjohn, Sage; Reitz, Rolf D.

doi:10.4271/2010-01-2206

Cited by 102 publications

(52 citation statements)

References 11 publications

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“…Their study found that the low reactivity of ethanol enabled an increased reactivity gradient and reduced the PRR (pressure rise rate) compared to gasoline; furthermore, the peak load could be increased from 8 to 10 bar BMEP (Brake Mean Effective Pressure) due to ethanol's lower propensity for auto ignition [43]. R Curran et al studied the efficiency and emissions of RCCI fueled with gasoline/diesel and found that NOx and soot emissions decreased by more than 90% [44].…”

Section: Introductionmentioning

confidence: 97%

Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Qian

Wang

Zhu

et al. 2015

Energy

105

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Section: Introductionmentioning

confidence: 97%

Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Qian

Wang

Zhu

et al. 2015

Energy

105

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“…Previous experiments have investigated the translational effects of taking CFD modeling and single cylinder engine experiments to multi-cylinder engines (MCE) on efficiency, emissions, and controls [17,18,19,20,21,22,23]. These effects include the behavior of real turbomachinary, effects of real EGR, cylinder to cylinder imbalances and swirl with production viable engine components.…”

Section: Reactivity Controlled Compression Ignition Drive Cycle Emissmentioning

confidence: 99%

Reactivity Controlled Compression Ignition Drive Cycle Emissions and Fuel Economy Estimations Using Vehicle Systems Simulations with E30 and ULSD

Curran¹,

Gao²,

Wagner³

2014

SAE Int. J. Engines

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In-cylinder blending of gasoline and diesel to achieve reactivity controlled compression ignition (RCCI) has been shown to reduce NO X and PM emissions while maintaining or improving brake thermal efficiency as compared to conventional diesel combustion (CDC). The RCCI concept has an advantage over many advanced combustion strategies in that the fuel reactivity can be tailored to the engine speed and load allowing stable low-temperature combustion to be extended over more of the light-duty drive cycle load range. However, the current range of the experimental RCCI engine map investigated here does not allow for RCCI operation over the entirety of some drive cycles and may require a multi-mode strategy where the engine switches from RCCI to CDC when speed and load fall outside of the RCCI range. The potential for RCCI to reduce drive cycle fuel economy and emissions is explored here by simulating the fuel economy and emissions for a multi-mode RCCI-enabled vehicle operating over a variety of U.S. drive cycles using experimental engine maps for multi-mode RCCI with E30 and ULSD, CDC and a variety of 2009 port-fuel injected (PFI) gasoline engines ranging from 1.8L to 4.0L. Simulations are completed assuming a conventional mid-size passenger vehicle with an automatic transmission that is optimized for each engine. RCCI fuel economy simulation results are compared to the same vehicle powered by a representative 2009 PFI gasoline engine over multiple drive cycles and showing at least a 20% improvement in fuel economy over a PFI baseline. Engine-out drive cycle emissions are compared to CDC and observations regarding relative gasoline and diesel tank sizes needed for the various drive cycles are also summarized.

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“…Uncertainty analysis is necessary to verify the accuracy of the experiments. 50 However, shiing the SOI to À95 ATDC caused the BTE to drop off sharply. To compute the overall percentage uncertainty from the combined effect of the uncertainties of various variables, the principle of propagation of errors can be estimated as AE4.3%.…”

Section: Statistical and Equipment Uncertainty Analysismentioning

confidence: 99%

Comparative assessment of performance, emissions and combustion characteristics of gasoline/diesel and gasoline/biodiesel in a dual-fuel engine

et al. 2015

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In recent years, rapid growth in population, development, and industrialization have led to a high demand for energy worldwide. Biofuels from bio-based products can be considered an alternative to fossil fuels used in the transport sector. However, the use of biodiesel in conventional diesel combustion engines has usually caused lower thermal efficiency and higher specific fuel consumption. Using alternative fuels and switching to promising combustion technologies such as low temperature combustion (LTC) are reliable approaches to address this issue. This research aims to use biofuels as an alternative energy source for engines operating in dual-fuel combustion mode. The effects of diesel/biodiesel strategies on dual-fuel combustion were investigated. This dual-fuel combustion mode proposes port fuel injection of gasoline and direct injection of diesel/biodiesel fuel with rapid in-cylinder fuel blending. The results of engine performance, emissions, and cylinder pressure were recorded and analyzed. The results showed that engines operating under dual-fuel combustion mode could achieve high efficiency with near zero nitrogen oxide (NO x ) and smoke emissions. The biodiesel-gasoline dual-fuel combustion mode showed lower hydrocarbon (HC) and carbon monoxide (CO) emissions than the diesel-gasoline dual-fuel combustion mode. The oxygen content in biodiesel is especially useful in limiting locally fuel rich regions, resulting in improved combustion and thereby reducing HC and CO emissions simultaneously.

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In-Cylinder Fuel Blending of Gasoline/Diesel for Improved Efficiency and Lowest Possible Emissions on a Multi-Cylinder Light-Duty Diesel Engine

Cited by 102 publications

References 11 publications

Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Reactivity Controlled Compression Ignition Drive Cycle Emissions and Fuel Economy Estimations Using Vehicle Systems Simulations with E30 and ULSD

Comparative assessment of performance, emissions and combustion characteristics of gasoline/diesel and gasoline/biodiesel in a dual-fuel engine

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