Experimental comparison of combustion and emission characteristics between a market gasoline and its surrogate

Esposito, Stefania; Cai, Liming; Günther, Marco; Pitsch, Heinz; Pischinger, Stefan

doi:10.1016/j.combustflame.2019.12.025

Cited by 21 publications

(17 citation statements)

References 58 publications

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“…The specific experimental setup has already been described in other publications from the authors. 7,59,60 The main technical data of the SCE are listed in Table 1.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

“…The investigations have been performed with a conventional RON95E5 market fuel as well as a toluene reference fuel (TRF, mixture of iso-octane, n-heptane and toluene) surrogate with the addition of ethanol (TRF + E). The surrogate fuel composition targeted the relevant chemical properties of the RON95E5 gasoline 60 and its composition in mass (%), after the real mixing, was X iC 8 H 18 = 51:8%, X nC 7 H 16 = 13:3%, X C 7 H 8 = 28:8%, X C 2 H 5 OH = 6:1%. In Esposito et al, 60 the authors showed that this TRF + E could accurately reproduce the behavior of the market RON95E5 fuel regarding global combustion and gaseous emission behavior.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

“…The surrogate fuel composition targeted the relevant chemical properties of the RON95E5 gasoline 60 and its composition in mass (%), after the real mixing, was X iC 8 H 18 = 51:8%, X nC 7 H 16 = 13:3%, X C 7 H 8 = 28:8%, X C 2 H 5 OH = 6:1%. In Esposito et al, 60 the authors showed that this TRF + E could accurately reproduce the behavior of the market RON95E5 fuel regarding global combustion and gaseous emission behavior. Due to the simpler composition, the measurement results with surrogate fuel are taken into account in this work.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

“…In this specific measurement campaign, multiple emission measurement devices for gaseous emissions have been applied in different positions, as reported in Esposito et al 59,60 Relevant for this study are the average gaseous emission measurement performed with conventional emission analyzers. These standard measurements have been performed with a FEV Emission Rate (FEVER) device.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

“…These standard measurements have been performed with a FEV Emission Rate (FEVER) device. The main specification of the devices can be found in Esposito et al 60 The FEVER measurement sampling position considered for this study was located in the exhaust runner, about 13 cm downstream the exhaust valves. A schematic of the SCE and of the FEVER emission measurement position is reported in Figure 1.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

See 4 more Smart Citations

Prediction of gaseous pollutant emissions from a spark-ignition direct-injection engine with gas-exchange simulation

Esposito

Diekhoff²,

Pischinger

2021

International Journal of Engine Research

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With the further tightening of emission regulations and the introduction of real driving emission tests (RDE), the simulative prediction of emissions is becoming increasingly important for the development of future low-emission internal combustion engines. In this context, gas-exchange simulation can be used as a powerful tool for the evaluation of new design concepts. However, the simplified description of the combustion chamber can make the prediction of complex in-cylinder phenomena like emission formation quite challenging. The present work focuses on the prediction of gaseous pollutants from a spark-ignition (SI) direct injection (DI) engine with 1D–0D gas-exchange simulations. The accuracy of the simulative prediction regarding gaseous pollutant emissions is assessed based on the comparison with measurement data obtained with a research single cylinder engine (SCE). Multiple variations of engine operating parameters – for example, load, speed, air-to-fuel ratio, valve timing – are taken into account to verify the predictivity of the simulation toward changing engine operating conditions. Regarding the unburned hydrocarbon (HC) emissions, phenomenological models are used to estimate the contribution of the piston top-land crevice as well as flame wall-quenching and oil-film fuel adsorption-desorption mechanisms. Regarding CO and NO emissions, multiple approaches to describe the burned zone kinetics in combination with a two-zone 0D combustion chamber model are evaluated. In particular, calculations with reduced reaction kinetics are compared with simplified kinetic descriptions. At engine warm operation, the HC models show an accuracy mainly within 20%. The predictions for the NO emissions follow the trend of the measurements with changing engine operating parameters and all modeled results are mainly within ±20%. Regarding CO emissions, the simplified kinetic models are not capable to predict CO at stoichiometric conditions with errors below 30%. With the usage of a reduced kinetic mechanism, a better prediction capability of CO at stoichiometric air-to-fuel ratio could be achieved.

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“…The specific experimental setup has already been described in other publications from the authors. 7,59,60 The main technical data of the SCE are listed in Table 1.…”

Section: Measurements At the Si DI Research Scementioning

confidence: 99%

Section: Measurements At the Si DI Research Scementioning

confidence: 99%