Effects of Oxygenated Fuel and Cetane Improver on Exhaust Emission from Heavy-Duty DI Diesel Engines

Akasaka, Yukio; Sakurai, Yoshihito

doi:10.4271/942023

Cited by 40 publications

(15 citation statements)

References 14 publications

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“…Table 7. 2 Absolute SMPS number and volume concentration totals, peak magnitudes, and peak magnitude diameters, for decreasing oxygenate volatility. Table 7.…”

Section: Pagementioning

confidence: 99%

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Effects of Oxygenated Fuels on DI Diesel Combustion and Emissions

Hallgren

Heywood

2001

SAE Technical Paper Series

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Emissions from compression ignition (CI) engines are being placed under stricter regulations. The use of oxygenated fuels has been proposed as a means of complying with future emission levels. Previous research on oxygenates has suggested the presence of molecular oxygen within the fuel significantly reduces the formation of particulate matter (PM). The PM reduction is logarithmic and correlates with the weight percent of oxygen in the fuel and not with other properties such as chemical structure and volatility. However, many studies fail to correctly decouple the effects of oxygenates from other fuel properties that impact emission levels; such as cetane number, density, aromatic content, and volatility.Mechanisms responsible for changes in the combustion process and emissions were investigated with a matrix containing 14 fuels, addressing oxygenate proportionality, structure, volatility, equivalent structure without oxygen, and changes in the base diesel fuel. A scanning mobility particle sizer (SMPS) was used to evaluate changes in particle size distributions, in addition to gravimetric filter and oxides of nitrogen (NOx) measurements.Engine emissions tests were conducted using a Ricardo Hydra MK IV direct injection (DI) diesel engine. The sensitivity of engine operation parameters to intake temperature, load, injection timing, and ignition delay (ID) were evaluated with the baseline fuel. All fuels in the matrix were matched for total released energy and combustion phasing, using a cetane improving additive. The changes in emission have been quantified with agreement between the relative trends observed with the integrated SMPS volume concentrations and filter measurements. In order to evaluate changes among fuels and measurements taken with the SMPS, various fuels were subjected to physical and chemical characterization in order to determine morphological and compositional changes.

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“…Table 7. 2 Absolute SMPS number and volume concentration totals, peak magnitudes, and peak magnitude diameters, for decreasing oxygenate volatility. Table 7.…”

Section: Pagementioning

confidence: 99%

“…Recent publications indicate that modest amounts of molecular oxygen in the fuel substantially reduce particulates [2][3][4][5][6][7][8][9][10]. Some oxygenates also offer secondary benefits as well, such as increasing the cetane number (CN) and reducing sulfur content [49].…”

Section: Oxygenated Fuelsmentioning

confidence: 99%

Effects of Oxygenated Fuels on DI Diesel Combustion and Emissions

Hallgren

Heywood

2001

SAE Technical Paper Series

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“…Higher cetane fuels will have shorter ignition delay periods than lower cetane fuels in a particular diesel engine [8]. Higher cetane numbers reduced the regulated and unregulated emissions including NO x in addition to the improvement in the engine performance [9][10][11]. Several authors [12][13][14] reported that cetane improver in combination with oxygenates improved engine performance in addition to the reduction in emissions.…”

Section: Introductionmentioning

confidence: 99%

Performance and Emission Improvement of Biodiesel Fueled Diesel Engine with Exhaust Gas Recirculation and Ethyl Hexyl Nitrate Additive

Venkateswarlu

Murthy²,

Subbarao³

2015

IJBSBT

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“…The diesel engine could be applied the high compression ratio 1 but the maximum output of the diesel engine could be limited due to the smoke concentration of the exhaust emission. 1,2 One method to reduce the exhaust emission materials from the diesel engine would be modifications of design techniques of the diesel engine or modifications properties and status of diesel fuels to reduce the exhaust gas before emitted as a pre-treatment method. The other method, as a post-treatment method, would be catalyst, particulate trap, or exhaust gas recirculation (EGR) methods to treat the exhaust gas.…”

Section: Introductionmentioning

confidence: 99%

Application on Oxygenated Fuel of Mono-Ether Group in an Idi Diesel Engine

Kim

Choi

2012

Int. J. Mod. Phys. Conf. Ser.

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Effect of oxygen components of fuels on exhaust emissions has been investigated by applying an indirect injection (IDI) diesel engine. This research analyzed variation and/or difference of the engine performance and exhaust emission characteristics of the IDI diesel engine by fueling the commercial diesel fuel and four different mixed ratios of oxygenated blended fuels. Effect of the exhaust gas recirculation (EGR) method was analyzed on the NOx emission characteristics. Ethylene glycol mono-n-butyl ether (EGBE) contains 27% of oxygen components in itself, and it is a kind of effective oxygenated fuel of mono-ether group. Smoke emission from the EGBE was reduced remarkably relative to the commercial diesel fuel. The EGBE can supply oxygen components sufficiently at higher diesel engine loads and speeds. It was found that a simultaneous reduction of the smoke and the NOx was achieved with the oxygenated fuel (10 vol-%) and the cooled EGR method (10%).

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Effects of Oxygenated Fuel and Cetane Improver on Exhaust Emission from Heavy-Duty DI Diesel Engines

Cited by 40 publications

References 14 publications

Effects of Oxygenated Fuels on DI Diesel Combustion and Emissions

Effects of Oxygenated Fuels on DI Diesel Combustion and Emissions

Performance and Emission Improvement of Biodiesel Fueled Diesel Engine with Exhaust Gas Recirculation and Ethyl Hexyl Nitrate Additive

Application on Oxygenated Fuel of Mono-Ether Group in an Idi Diesel Engine

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