THERMAL SCIENCE

International Scientific Journal

AN EXPERIMENT STUDY OF HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION AND EMISSION IN A GASOLINE ENGINE

ABSTRACT
Homogenous charge compression ignition (HCCI) technology has exhibited high potential to reduce fuel consumption and NOx emissions over normal spark ignition engines significantly. Optimized kinetic process (OKP) technology is implemented to realize HCCI combustion in a port fuel injection gasoline engine. The combustion and emission characteristics are investigated with variation of intake air temperature, exhaust gas recirculation (EGR) rate and intake air pressure. The results show that intake air temperature has great influence on HCCI combustion characteristic. Increased intake air temperature results in advance combustion phase, shorten combustion duration, and lower indicated mean effective pressure (IMEP). Increased EGR rate retards combustion start phase and prolongs combustion duration, while maximum pressure rising rate and NOx emission are reduced with increase of EGR rate. In the condition with constant fuel flow quantity, increased air pressure leads to retarded combustion phase and lower pressure rising rate, which will reduce the engine knocking tendency. In the condition with constant air fuel ratio condition, fuel injection quantity increases as intake air pressure increases, which lead to high heat release rate and high emission level. The optimal intake air temperature varies in different operating area, which can be tuned from ambient temperature to 220℃ by heat management system. The combination of EGR and air boost technology could expand operating area of HCCI engine, which improve indicated mean effective pressure from maximum 510kPa to 720kPa.
KEYWORDS
PAPER SUBMITTED: 2013-04-16
PAPER REVISED: 2014-01-17
PAPER ACCEPTED: 2014-01-20
PUBLISHED ONLINE: 2014-02-09
DOI REFERENCE: https://doi.org/10.2298/TSCI130416009Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE 1, PAGES [295 - 306]
REFERENCES
  1. Yang, J., et al., Development of a Gasoline Engine System Using HCCI Technology - The Concept and the Test Results, SAE International 2002-01-2832, 2002
  2. Zhao, H., et al., Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion, SAE International 2002-01-0420, 2002
  3. Zhang, Y., et al., 2-Stroke CAI Operation on a Poppet Valve DI Engine Fuelled with Gasoline and its Blends with Ethanol, SAE International 2013-01-1674, 2013
  4. Christensen, M., et al., Demonstrating the Multi Fuel Capability of a Homogeneous Charge Compression Ignition Engine with Variable Compression Ratio, SAE International 1999-01-3679, 1999
  5. Hou, Y.C., et al., Effect of high-octane oxygenated fuels on n-heptane-fueled HCCI combustion, Energy and Fuels, 20 (2006),4, pp. 1425-1433
  6. Dong, H.A.N., et al., PREMIXED IGNITION CHARACTERISTICS OF BLENDS OF GASOLINE AND DIESEL-LIKE FUELS ON A RAPID COMPRESSION MACHINE, Thermal Science, 17 (2013),1, pp. 1-10
  7. Ma, J.J., et al., An experimental study of HCCI-DI combustion and emissions in a diesel engine with dual fuel, International Journal of Thermal Sciences, 47 (2008),9, pp. 1235-1242
  8. Yang, J. and T. Kenney, Robustness and Performance Near the Boundary of HCCI Operating Regime of a Single-Cylinder OKP Engine, SAE International 2006-01-1082, 2006
  9. Hernandez, J.J., et al., Reduction of kinetic mechanisms for fuel oxidation through genetic algorithms, Mathematical and Computer Modelling, 52 (2010),7-8, pp. 1185-1193
  10. Lee, K., et al., Development of a reduced chemical kinetic mechanism for a gasoline surrogate for gasoline HCCI combustion, Combustion Theory and Modelling, 15 (2011),1, pp. 107-124
  11. Olsson, J.-O., et al., Compression Ratio Influence on Maximum Load of a Natural Gas Fueled HCCI Engine, SAE International 2002-01-0111, 2002
  12. Swami Nathan, S., et al., Effects of charge temperature and exhaust gas re-circulation on combustion and emission characteristics of an acetylene fuelled HCCI engine, Fuel, 89 (2009),2, pp. 515-521
  13. Kalghatgi, G.T. and R.A. Head, Combustion Limits and Efficiency in a Homogeneous Charge Compression Ignition Engine, International Journal of Engine Research, 7 (2006),3, pp. 215-236
  14. Kwon, O.S. and O.T. Lim, Effect of boost pressure on thermal stratification in HCCI engine using the multi-zone model, Journal of Mechanical Science and Technology, 24 (2010),1, pp. 399-406
  15. Olsson, J.-O., et al., A Turbo Charged Dual Fuel HCCI Engine, SAE International 2001-01-1896, 2001
  16. Fuerhapter, A., et al., CSI - Controlled Auto Ignition - the Best Solution for the Fuel Consumption - Versus Emission Trade-Off? , SAE International 2003-01-0754, 2003
  17. Yang, J., Expanding the operating range of homogeneous charge compression ignition-spark ignition dual-mode engines in the homogeneous charge compression ignition mode, International Journal of Engine Research, 6 (2005),4, pp. 279-288

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