Experimental investigation of the effect of E85 on engine performance and emissions under various ignition timings

Türköz, Necati; Erkuş, Barış; Karamangil, M. İhsan; Sürmen, Ali; Arslanoglu, Nurullah

doi:10.1016/j.fuel.2013.03.009

Cited by 49 publications

(11 citation statements)

References 36 publications

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“…As mentioned earlier, several fuels have been studied as alternatives for the dual fuel combustion. There are also many studies [29][30][31] focusing on how E85 performs in SI engines, but the writers are not aware of any earlier studies on E85 as a dual fuel combustion fuel. There are several studies on the effects of E85 on a reactivity controlled compression ignition (RCCI) combustion strategy [32,33], but since RCCI differs from the dual fuel concept employed in this study, it is not discussed further here.…”

Section: Introductionmentioning

confidence: 99%

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Sarjovaara

Larmi

2015

Fuel

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In this experimental study, the ethanol/gasoline blend E85 was used as the primary fuel in a dual-fuel combustion concept. The E85 blend was injected at low pressure into the intake manifold and the mixture was ignited via a diesel fuel injection near top dead centre. The research engine was based on a heavy-duty diesel engine equipped with a common-rail injection system. Only the duration of the diesel injection was modified in the diesel injection system during the tests-the other diesel injection parameters were not changed. The goal was to study the possibilities of using the waste material-based E85 ethanol blend on dual-fuel concept as a promising future bio-fuel option. The results were promising, though the engine was not optimised for the combustion concept being studied and minimum modifications were done to the engine. High E85 rates (up to 89%) by energy content were achieved, especially under medium load conditions. On the high and low load portions were lower, but the E85 rates were higher than 30% even in these cases. For most of the cases, the limiting issue was the pressure rise rate, but in cases with the highest portions of E85 the limiting factor was the minimum quantity of the diesel fuel enabling two phase diesel fuel injection. In all cases the E85 increased carbon-monoxide and un-burned hydrocarbon emission, but the nitrogen oxide emission decreased simultaneously in most of the cases. Smoke emissions were low in all cases, but at highest E85 rate smoke emissions further decreased to near zero value.

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Section: Introductionmentioning

confidence: 99%

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Sarjovaara

Larmi

2015

Fuel

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“…On the other hand, the advanced ignition for ethanol-gasoline blend applied in real engine have been tested under homogenous combustion and revealed the benefits of enhanced combustion efficiency and reduced pollutant emissions [18,44]. Those studies, however, have somewhat different from the strategy of advanced ignition in this study.…”

Section: Further Discussion-comparison To the Real Disi Engine Testmentioning

confidence: 72%

Effect of Ethanol Ratio on Ignition and Combustion of Ethanol-Gasoline Blend Spray in DISI Engine-Like Condition

Chen

Okazumi

Nishida

et al. 2015

SAE Int. J. Fuels Lubr.

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To reduce carbon dioxide emission and to relieve the demand of fossil fuels, ethanol is regarded as one of the most promising alternative fuels for gasoline. Recently, using ethanol in the state-of-the-art gasoline engine, direct-injection spark-ignition (DISI) engine, has become more attention by researchers due to less knowledge of the ignition and combustion processes in that engine.In this study, different ethanol-gasoline blended fuels, E0 (100% gasoline), E85 (85% ethanol and 15% gasoline mixed in volume basis) and E100 (100% ethanol) were injected by a valve-covered-orifice (VCO) hole-type nozzle. The experimental environment was set to the condition similar with the near top dead center (TDC) in DISI engine. The high-speed imaging of shadowgraph, OH* chemiluminescence and flame natural luminosity were used to clarify the characteristics of the ignition process, flame development and propagation. Results revealed that the flame propagation was directed towards the downstream of spray but not the upstream where the local mixture became diluted. In comparison to the pure gasoline, adding ethanol increased sensitivity to the spark energy. The good burn showed a fast flame growth and larger flame radius. While the poor combustion revealed a long-narrow flame shape and inferior development of the flame radius. Also, the E85 and E100 demonstrated a moderate natural luminosity or nearly transparent-like appearance. Different ignition position and timing were investigated in this study. The ethanol-gasoline blend showed a potential favorable combustion when the fuel was ignited at advanced timing and the middle to downstream of spray.

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“…The lower flame temperatures of ethanol due to the increased enthalpy of vaporization can be seen by a reduction in exhaust temperature. The trend of NOx emissions with respect to ethanol blends is not as clear as for unburned hydrocarbon emissions . A reduction in HC emissions was also found with an increased blend ratio.…”

Section: Introductionmentioning

confidence: 79%

“…Ethanol is a competitive alternative to petroleum‐based fossil fuels for automotive engines due to its high octane rating and clean burning . It has also been used as an additive to improve the octane rating of gasoline even though it has the disadvantage of difficult starting in low temperatures . It is particularly attractive as an alternative fuel because it is a renewable bio‐based resource, and provides the potential to reduce harmful exhaust emissions in spark‐ignition (SI) engines .…”

Section: Introductionmentioning

confidence: 99%

Exhaust emissions and conversion efficiency of catalytic converter for an ethanol‐fueled spark ignition engine

Kim

Myung

Lee

2019

Biofuels Bioprod Bioref

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The effects of the air-fuel (A/F) ratio and spark timing on exhaust emissions and thermal efficiency were analyzed under part load conditions using an ethanol-fueled spark ignition (SI) engine. The conversion efficiency of exhaust emissions after the application of a three-way catalyst (TWC) to a gasoline engine was also evaluated. The cycle-resolved measurement of hydrocarbon (HC) and NOx emissions was attempted, to investigate phenomena in the exhaust port with a fast-response exhaust gas analyzer, and this was compared under different operating conditions. The different HC emission trends for the relative A/F ratios, as measured by a conventional exhaust gas analyzer and by the fast response analyzer, are thought to be due to differences in measuring location and the oxidation reaction of HC in the exhaust system. To optimize the ethanol A/F ratio to improve the conversion efficiency of TWC, it is thought that a slightly richer or leaner A/F ratio than stoichiometry would be better depending on the operating conditions and the levels of HC, CO, and NOx emissions, because the conversion efficiency of HC and CO is better with a leaner A/F ratio and the conversion efficiency of NOx is increased with a richer A/F ratio.

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Experimental investigation of the effect of E85 on engine performance and emissions under various ignition timings

Cited by 49 publications

References 36 publications

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Effect of Ethanol Ratio on Ignition and Combustion of Ethanol-Gasoline Blend Spray in DISI Engine-Like Condition

Exhaust emissions and conversion efficiency of catalytic converter for an ethanol‐fueled spark ignition engine

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