Browse > Article
http://dx.doi.org/10.5916/jkosme.2007.31.1.26

Analysis of Cylinder Swirl Flow and Lean Combustion Characteristics of 3rd Generation LPLI(Liquid Phase LPG Injection) Engine  

Kang, Kern-Yong (한국기계연구원 친환경엔진연구센터)
Lee, Jin-Wook (한국기계연구원 친환경엔진연구센터)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.1, 2007 , pp. 26-33 More about this Journal
Abstract
The intake swirl motion, as one of dominant effects for an engine combustion. is very effective for turbulence enhancement during the compression process in the cylinder of 2-valve engine. Because the combustion flame speed is determined by the turbulence that is mainly generated from the mean flow of the charge air motion in intake port system. This paper describes the experimental results of swirl flow and combustion characteristics by using the oil spot method and back-scattering Laser Doppler velocimeter (LDV) in 2-valve single cylinder transparent LPG engine using the liquid phase LPG injection. For this. various intake port configurations were developed by using the flow box system and swirl ratios for different intake port configurations were determined by impulse swirl meter in a steady flow rig test. And the effects of intake swirl ratio on combustion characteristics in an LPG engine were analyzed with some analysis parameters that is swirl ratio. mean flow coefficient, swirl mean velocity fuel conversion efficiency. combustion duration and cyclic variations of indicated mean effective pressure(IMEP). As these research results, we found that the intake port configuration with swirl ratio of 2.0 that has a reasonable lean combustion stability is very suitable to an $11{\ell}$ heavy-duty LPG engine with liquid phase fuel injection system. It also has a better mean flow coefficient of 0.34 to develope a stable flame kernel and to produce high performance. This research expects to clarify major factor that effects on the design of intake port efficiently with the optimized swirl ratio for the heavy duty LPG engine.
Keywords
Liquid Phase LPG injection(LPLI); Intake swirl flow; Swirl ratio; Back-scattering scheme; Laser Doppler velocimeter; Heavy-duty single cylinder LPG engine;
Citations & Related Records
연도 인용수 순위
  • Reference
1 H. Heisler, 'Advanced Engine Technology', SAE international, 1994
2 R. Sierens, 'An Experimental and Theoretical Study of Liquid LPG Injection', SAE paper 922363, 1992
3 Fansler, T. D., 'Turbulence Production and Relaxation in Bowl-in Piston Engine', SAE paper 930479, 1993
4 J. B. Heywood, Internal Combustion Engine Fundamentals, pp. 85, McGraw-Hill Book Company, 1988
5 Ir. Servaas Jaasma, 'The Development of Heavy Duty LPI Systems', Vialle Technical Paper, 1998
6 M. Steen, J. Rijke, J. Seppen, 'Stoichiometric and Lean Burn Heavy-duty Gas Engine - A Dilemma between Exhaust Emission and Fuel Consumption?', TNO paper, VM 9605,1995
7 J. Weide, J. Seppen, J. Ling and H. Dekker, 'Experience with CNG and LPG Operated Heavy Duty Vehicles with Emphasis on US HD Diesel Emission Standards', SAE paper 881657, 1988
8 Shinichi Goto, Daeyup Lee et. al., 'Performance and Emissions of an LPG Lean-Burn Engine for Heavy Duty Vehicles', SAE paper 1999-01-1513, 1999
9 S. H. Woo, J. W. Lee, K. Y. Kang, K. H. Lee,'Analysis of Intake Port Characteristics for Swirl Flow Generation of Heavy-duty Engine', KSAE Autumn Congress, pp.320-325, 2000
10 C. R .Stone, N.Ladommatos, 'The Measurement and Analysis of Swirl in Steady Flow', SAE paper 921642, 1992