THERMAL SCIENCE

International Scientific Journal

External Links

INVESTIGATION OF DIESEL ENGINE FOR LOW EXHAUST EMISSIONS WITH DIFFERENT COMBUSTION CHAMBERS

ABSTRACT
Upcoming stringent Euro-6 emission regulations for passenger vehicle better fuel economy, low cost are the key challenges for engine development. In this paper, 2.2L, multi cylinder diesel engine have been tested for four different piston bowls designed for compression ratio of CR 15.5 to improve in cylinder performance and reduce emissions. These combustion chambers were verified in CFD at two full load points. 14 mode points have been derived using vehicle model run in AVL CRUISE software as per NEDC cycle based on time weightage factor. Base engine with compression ratio CR16.5 for full load performance and 14-mode points on Engine test bench was taken as reference for comparison. The bowl with flat face on bottom corner has shown reduction 25% and 12 % NOx emissions at 1500 and 3750 rpm full load points at same level of Soot emissions. Three piston bowls were tested for full load performance and 14 mode points on engine test bench and combustion chamber ‘C’ has shown improvement in thermal efficiency by 0.8%. Combinations of cooled EGR and combustion chamber ‘C’ with geometrical changes in engine have reduced exhaust NOx, soot and CO emissions by 22%, 9 % and 64 % as compared to base engine at 14 mode points on engine test bench.
KEYWORDS
PAPER SUBMITTED: 2014-09-04
PAPER REVISED: 2015-10-11
PAPER ACCEPTED: 2015-11-18
PUBLISHED ONLINE: 2015-12-13
DOI REFERENCE: https://doi.org/10.2298/TSCI140904176G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE 6, PAGES [2013 - 2024]
REFERENCES
  1. Akihama, K., and et al., "Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature," SAE Technical Paper 2001-01-0655, 2001, doi:10.4271/2001-01-0655.
  2. AVL CRUISE Manual
  3. AVL FIRE Manual
  4. Bouchez, M. and Dementhon, J., "Strategies for the Control of Particulate Trap Regeneration," SAE Technical Paper 2000-01-0472, 2000, doi: 10.4271/2000-01-0472.
  5. Bergstrand, P. and Denbratt, I., "The Effects of Leaner Charge and Swirl on Diesel Combustion," SAE Technical Paper 2002-01-1633, 2002, doi: 10.4271/2002-01-1633.
  6. Delphi, worldwide Emission standards, passenger cars and light duty vehicles,2013-2014
  7. Hasegawa, R. and Yanagihara, H., "HCCI Combustion in DI Diesel Engine," SAE Technical Paper 2003-01-0745, 2003, doi: 10.4271/2003-01-0745.
  8. Heywood, J.B., Internal Combustion Engine Fundamentals, McGraw-Hill 1988
  9. Kimura, S., and et al., "Ultra-Clean Combustion Technology Combining a Low Temperature and Premixed Combustion Concept for Meeting Future Emission Standards," SAE Technical Paper 2001-01-0200, 2001, doi: 10.4271/2001-01-0200.
  10. Miles, P., and et al., "Influence of injector nozzle design and cavitation on coking phenomenon," SAE Technical Paper 2007-01-1896, 2007, doi:10.4271/2007-01-1896.
  11. Miles, P., and et al., "Late-Cycle Turbulence Generation in Swirl-Supported, Direct-Injection Diesel Engines," SAE Technical Paper 2002-01-0891, 2002, doi:10.4271/2002-01-0891.
  12. Miles, P.C and et al., "Squish-Swirl and Injection-Swirl Interaction in Direct Injection Diesel Engines", 6th International Conference on Engines for Automobile, Proceedings of ICE2003, Capri-Naples, Italy, September 14, 2003 - September 19, 2003
  13. Shi, Y. and Reitz, R., "Assessment of Optimization Methodologies to Study the Effects of Bowl Geometry, Spray Targeting and Swirl Ratio for a Heavy-Duty Diesel Engine Operated at High-Load", SAE Int. J. Engines 1(1): 537-557, 2009, doi: 10.4271/2008-01-0949.
  14. J Dolak and R D Reitz, "Optimization Of The Piston Geometry Of A Diesel Engine Using A Two-Spray-Angle Nozzle", Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 2011 225: 406 DOI: 10.1177/09544070JAUTO1626.

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence