Influence of Compression Ratio, EGR Rate and Main Injection Fuel Quantity on Combustion and Emissions in a PCCI Diesel Engine

Abstract:

In this study, simulation model on combustion process of a diesel engine was developed and the results were validated by experiments. Then the compression ignition was switched into PCCI (Premixed Charge Compression Ignition) in order to understand the effects of individual parameters on PCCI combustion and provide the reference for the further studies of testing and simulation. The results illustrate that the lower compression ratio extends the ignition delay and enhances fuel-air mixing and improves PCCI combustion. In addition, the oxygen concentration in cylinder is highly diluted as the EGR (Exhaust Gas Recirculation) rate increases and the NOx (Oxides of nitrogen) emissions are effectively depressed as EGR rate over 30%. Moreover, the reduction of main injection fuel quantity results in a decrease reactivity and peak heat release rate in combustion.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 1386-1391
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.1386
• Online since: June 2014
• Authors: Sen Lin Xiao, Wan Chen Sun*, Jia Kun Du, Guo Liang Li, Man Zhi Tan
• Keywords: Combustion, Compression Ratio, EGR Rate, Main Injection Fuel Quantity, PCCI

References

[1] Rolf D. Reitz: Combustion and Flame, Vol. 160(1) (2013), p.1.

[2] Mark P. B Musculus, Paul C. Miles and Lyle M. Pickett: Progress in Energy and Combustion Science Vol. 39 (2013), p.246.

[3] Samveg Saxena, Iván D. Bedoya: Progress in Energy and Combustion Science Vol. 39 (2013), p.457.

[4] Kokjohn S L, Hanson R M and Splitter D A: International Journal of Engine Research, Vol. 12(3) (2011), p.209.

[5] Visakhamoorthy S, Tzanetakis T and Haggith D: Applied Energy Vol. 92 (2012), p.437.

[6] N.P. Komninos, C.D. Rakopoulos: Renewable and Sustainable Energy Reviews, Vol. 16(3) (2012), p.1588.

[7] Ulugbek Azimov, Nobuyuki Kawahara and Eiji Tomita: Fuel Vol. 98 (2012), p.164.

[8] Gan S, Ng H K, and Pang K M: Applied Energy, Vol. 88(3) (2011), p.559.

[9] Peng Z, Liu B and Wang W: Energies, Vol. 4(3) (2011), p.517.

[10] Hyung Jun Kim, Kwan Soo Lee and Chang Sik Lee: Fuel Processing Technology Vol. 92 (2011), p.1756.

[11] Laguitton O, Crua C and Cowell T: Energy Conversion and Management, Vol. 48(11) (2007), p.2918.

[12] Majid Ghorbanpour, Reza Rasekhi: Fuel Vol. 106 (2012), p.157.

[13] Alain Maiboom, Xavier Tauzia and Jean-François Hétet: Energy, Vol. 33(1) (2008), p.22.

[14] Hatim Machrafi, Simeon Cavadias and Jacques Amouroux: Energy Vol. 35 (2010), p.1829.

[15] H.E. Saleh: Renewable Energy, Vol. 34(10) (2009), p.2178.