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International Journal of Automotive Technology

, Volume 18, Issue 6, pp 943–950 | Cite as

Operating strategy for gasoline/diesel dual-fuel premixed compression ignition in a light-duty diesel engine

  • Jeongwoo Lee
  • Sanghyun Chu
  • Jaegu Kang
  • Kyoungdoug Min
  • Hyunsung Jung
  • Hyounghyoun Kim
  • Yohan Chi
Article

Abstract

Environmental problems have become a major issue for diesel engine development. Although emission aftertreatment systems such as DPFs (diesel particulate filters), LNTs (lean NOx traps) and SCR (selective catalytic reduction) have been used in diesel vehicles, the manufacturing cost increase caused by this equipment can be hard to be control. Thus, it is better for engine emissions to be reduced by improving the combustion system. A dual-fuel combustion concept is a recommended method to improve a combustion system and effectively reduce emissions. Low reactivity fuel including gasoline and natural gas, which was supplied to the intake port by the FPI (port fuel injector), improved the premixed air-fuel mixture conditions before ignition. Additionally, a small amount of high reactivity fuel, in this case diesel, was injected into the cylinder directly as an ignition source. This dual-fuel combustion promises lower levels of NOx (nitrogen oxide) and PM (particulate matter) emissions due to the elimination of local rich regions in the cylinder. However, it is challenging to control the dual-fuel combustion because the combustion stability and efficiency deteriorate due to the lack of ignition source and reactivity. Thus, it is important to establish an appropriate dual-fuel operating strategy to achieve stable, high efficiency and low emission operation. As a result of this research, a detailed operating method of dual-fuel PCI (premixed compression ignition) was introduced in detail at a low speed and low load condition by using a single cylinder diesel engine. Engine operating parameters including the gasoline ratio, a diesel injection strategy consisting of multiple injectors and timing, the EGR (exhaust gas recirculation) rate and the intake pressure were controlled to satisfy the low ISNOx (indicated specific NOx) and PM emissions levels (0.21 g/kWh and 0.1 FSN, 0.040 g/kWh, respectively) as per the EURO-6 regulation without any after-treatment systems. The results emphasized that a well-constructed dual-fuel PCI operating strategy showed low NOx and PM emissions and high GIE (gross indicated fuel conversion efficiency) with excellent combustion stability.

Key words

Diesel Dual fuel combustion Gasoline Nitrogen oxides Particulate matter Premixed Compression Ignition (PCI) 

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References

  1. Azimov, U., Tomita, E., Kawahara, N. and Harada, Y. (2011). Premixed mixture ignition in the end-gas region (PREMIER) combustion in a natural gas dual-fuel engine: operating range and exhaust emissions. Int. J. Engine Research 12, 5, 484–497.CrossRefGoogle Scholar
  2. Choi, D., Jung, H., Chi, Y. and Joo, S. (2013). Diesel/Gasoline dual fuel powered combustion system based on diesel compression ignition triggered ignition control. SAE Paper No. 2013-01-1718.Google Scholar
  3. Curran, S., Prikhodko, V., Cho, K., Charles, S., James, P., Robert, W., Sage, K. and Reitz, R. (2010). In-cylinder fuel blending of gasoline/diesel for improved efficiency and lowest possible emissions on a multi-cylinder lightduty diesel engine. SAE Paper No. 2010-01-2206.Google Scholar
  4. Curran, S., Hanson, R., Wagner, R. and Reitz, R. (2013). Efficiency and emissions mapping of RCCI in a lightduty diesel engine. SAE Paper No. 2013-01-0289.Google Scholar
  5. Han, D., Ickes, A., Bohac, S., Huang, Z. and Assanis, D. (2011). Premixed low-temperature combustion of blends of diesel and gasoline in a high speed compression ignition engine. Proc. Combustion Institute 33, 2, 3039–3046.CrossRefGoogle Scholar
  6. Heywood, J. (1988). Internal Combustion Engine Fundamentals. McGraw-Hill. New York, USA.Google Scholar
  7. Jasons, M., Brar, A., Estefanous, F., Florea, R., Taraza, D. and Henein, N. (2008). Experimental investigation of single and two-stage ignition in a diesel engine. SAE Paper No. 2008-01-1071.Google Scholar
  8. Jeon, J., Lee, J., Kwon, S. and Park, S. (2016). Combustion performance, flame, and soot characteristics of gasolinediesel pre-blended fuel in an optical compressionignition engine. Energy Conversion and Management, 116, 174–183.CrossRefGoogle Scholar
  9. Kokjohn, S., Hanson, R., Splitter, D. and Reitz, R. (2009). Experiments and modeling of dual-fuel HCCI and PCI combustion using in-cylinder fuel blending. SAE Paper No. 2009-01-2647.Google Scholar
  10. Kokjohn, S. and Reitz, R. (2010). Characterization of dualfuel PCCI combustion in a light-duty engine. Int. Multidimensional Engine Modeling User’s Group Meeting.Google Scholar
  11. Kokjohn, S., Hanson, R., Splitter, D., Kaddatz, J. and Reitz, R. (2011). Fuel reactivity controlled compression ignition (RCCI) combustion in light-and heavy-duty engines. SAE Paper No. 2011-01-0357.Google Scholar
  12. Lee, J., Choi, S., Kim, H., Kim, D., Choi, H. and Min, K. (2013). Reduction of emissions with propane addition to a diesel engine. Int. J. Automotive Technology 14, 4, 551–558.CrossRefGoogle Scholar
  13. Lee, J., Chu, S., Cha, J., Choi, H. and Min, K. (2015a). Effect of the diesel injection strategy on the combustion and emissions of propane/diesel dual fuel premixed charge compression ignition engines. Energy, 93, 1041–1052.CrossRefGoogle Scholar
  14. Lee, J. (2016). Experimental Study on the Characteristics of Dual-fuel Combustion Modes and Extension of Dualfuel PCI Operating Range in a CIEngine. Ph. D. Dissertation. Seoul National University. Seoul, Korea.Google Scholar
  15. Lee, K., Cho, S., Kim, N. and Min, K. (2015b). A study on combustion control and operating range expansion of gasoline HCCI. Energy, 91, 1038–1048.CrossRefGoogle Scholar
  16. Nieman, D., Dempsey, A. and Reitz, R. (2012). Heavyduty RCCI operation using natural gas and diesel. SAE Paper No. 2012-01-0379.Google Scholar
  17. Reitz, R. and Duraisamy, G. (2015). Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines. Progress in Energy and Combustion Science, 46, 12–71.CrossRefGoogle Scholar
  18. Splitter, D., Hanson, R., Kokjohn, S. and Reitz, R. (2010). Improving engine performance by optimizing fuel reactivity with a dual fuel PCI strategy. Thiesel Conf. Thermo and Fluid Dynamic Processes in Diesel Engines.Google Scholar
  19. Volkswagen Emissions Scandal (2015). https://en.wikipedia.org/wiki/Volkswagen_emissions_scandalGoogle Scholar
  20. Wu, Y., Hanson, R. and Reitz, R. (2014). Investigation of combustion phasing control during reactivity controlled compression ignition (RCCI) multi-cylinder engine load transitions. J. Engineering for Gas Turbines and Power 136, 10, 1–10.Google Scholar

Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Jeongwoo Lee
    • 1
  • Sanghyun Chu
    • 1
  • Jaegu Kang
    • 1
  • Kyoungdoug Min
    • 1
  • Hyunsung Jung
    • 2
  • Hyounghyoun Kim
    • 2
  • Yohan Chi
    • 2
  1. 1.Department of Mechanical and Aerospace EngineeringSeoul National UniversitySeoulKorea
  2. 2.Power Train R&D CenterHyundai Motor GroupGyeonggiKorea

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