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SAE International Journal of Fuels and Lubricants
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RETRACTED: Improved Lubrication Properties and Characterization of GO Nanoparticles as Lubricant Additives on Hypereutectic Al-17Si/AISI25100 Steel Sliding Pair

SAE International Journal of Fuels and Lubricants

Andhra University-I.N. Niranjan Kumar
Andhra University and Lakireddy Bali Reddy College of Engineering-K.N.D. Malleswara Rao
  • Journal Article
  • 04-11-02-0010
Published 2018-06-14 by SAE International in United States
SAE International has retracted this article.
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Effect of Spray-Exhaust Gas Interactions on Ammonia Generation in SCR Mixing Sections

SAE International Journal of Fuels and Lubricants

MCI Management Center Innsbruck-Verena Schallhart, Lukas Moeltner
  • Journal Article
  • 04-11-02-0009
Published 2018-05-22 by SAE International in United States
The selective catalytic reduction (SCR) of nitrogen oxides with ammonia is a promising solution to meet upcoming emission regulations for lean-burning combustion engines. Due to the toxicity of ammonia, exclusively SCR systems with precursor substances, e.g., a urea-water solution (UWS), are available or being developed. The determining factors for the efficiency of SCR systems are sufficient ammonia generation and homogenization upstream of the catalytic converter. In the first part, this study presents an experimental investigation of the occurring mechanisms during ammonia generation from UWS droplets; including the evaporation of water, the thermal decomposition of urea, and droplet-wall interactions. In the second part, the observed physical and chemical phenomena are mathematically described and constitute the basis for the development of a simulation model. For this purpose, experiments by means of TGA were conducted to thoroughly investigate the UWS decomposition. In addition, droplet-wall interactions in SCR mixing sections were analyzed. The developed simulation model is able to determine the droplets’ trajectories, their mass loss due to evaporation and decomposition of urea, and the change in the droplets’…
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Soot Observations and Exhaust Soot Comparisons from Ethanol-Blended and Methanol-Blended Gasoline Combustion in a Direct-Injected Engine

SAE International Journal of Fuels and Lubricants

Ford Motor Company-Steven Wooldridge
Link Engineering Company-Ravi Teja Vedula
  • Journal Article
  • 04-11-02-0008
Published 2018-05-07 by SAE International in United States
Particulate formation was studied under homogeneous-intent stoichiometric operating conditions when ethanol-blended (E10) or methanol-blended (M20) gasoline fuel was injected during intake stroke of a 4-stroke direct-injected engine. The engine was tested at wide open throttle under naturally aspirated conditions for a speed-load of 1500 rev/min and 9.8 bar indicated mean effective pressure. In-cylinder soot observations and exhaust soot measurements were completed for different fuel rail pressures, injection timings, coolant and piston temperatures of the optical engine. Fuel delivery settings were tested with both single and split injections during intake stroke. The target piston temperature of the optical engine was attained using pre-determined number of methane port fuel injection firing cycles. Overall, the in-cylinder soot observations correlated well with the engine-out soot measurements. A warmer cylinder head favored soot reduction for both fuels. A hot piston resulted in more soot than a warm piston, with a high fuel rail pressure. The two alcohol blends showed contrasting differences in their inclination for particulate formation. At the tested injection timing, a smaller and larger first split percent of…
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Corrosion Behavior of Automotive Materials with Biodiesel: A Different Approach

SAE International Journal of Fuels and Lubricants

Sardar Vallabhbhai National Institute of Technology-Kamalesh A. Sorate, Purnanand V. Bhale
  • Journal Article
  • 04-11-02-0007
Published 2018-05-07 by SAE International in United States
The issue of material compatibility of biodiesel has been discussed by few researchers but the reported corrosion rates were alarmingly high. This study addresses the corrosion issue of biodiesel with automotive materials with a different but systematic approach following SAE J1747 standard. In earlier studies while conducting material compatibility studies with biodiesel, mention of any specific standard/s has not been generally observed. Earlier studies were conducted by storing the samples for a long time without any change of fuel. However in actual automotive application, change of fuel is always on a periodic basis due to consumption of fuel and the SAE standard recommends for the same. This difference has a significant effect on the material compatibility as this periodic change does not result in making the fuel particularly biodiesel more acidic which is otherwise when stored for a long time during the test period. Though the corrosion rate in biodiesel is more, over diesel but biodiesel has a relatively lower adverse impact on materials than what reported in literature. Corrosion behaviour was investigated over a…
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