Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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The Effects of Pulsating Flow on Volumetric Efficiency in the Intake and Exhaust System in a Turbocharged Diesel Engine

흡.배기 시스템의 맥동류가 과급디젤기관의 체적효율에 미치는 영향

  • Published : 2009.08.30
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Abstract

This paper deals with the effects of pulsating flow on volumetric efficiency, which may be generated during the gas exchange procedure, due to piston motion, valve event on intake and exhaust stroke and unsteady flow of turbocharger of a three-cylinder four stroke turbo-charged diesel engine. Consequently, volumetric efficiency affects significantly the engine performance; torque characteristics, fuel economy and further to emission and noise level. As the expansion ratio became larger the engine speed varies and torque increases, the pressure pulsation in an exhaust gas pipe acts as an increasing factor of intake air charging capacity totally. The phase and amplitude of pressure pulsation in the intake system only affects volumetric efficiency favorably, if it is well matched and tuned effectively to the engine. Thus, to verify the exact phase and amplitude of the pressure variation is the ultimate solution for the air-flow ratio assessment in the intake stroke. Some experimental results of pressure diagrams in the intake pipe and gas-flow of turbine in-outlet are presented, under various kinds of operating condition.

Keywords

References

  1. M. Capobianco, A. Gambarotta and G. Cipolla, 1990, "ffeet of inlet pulsating pressure characteristics on turbine performance of an automotive waste-gated turbocharger", SAE Paper, 900359.
  2. M. Capobianco and A. Gambarotta, 1992, " Variable geometry and waste-gated automotive turbochargers: measurements and comparison of turbine performance", Transactions of the ASME, Journal of Engineering for Gas turbines and Power, July 1992, Vol. 114, pp. 553 - 560. https://doi.org/10.1115/1.2906624
  3. M. Capobianco and A. Gambarotta, 1990, "Unsteady Flow Performance of Turbocharger Radial Turbines", IMechE, C405/017.
  4. J. C. Livengood, A. R. Rogowski and C. F. Taylor, "The Volumetric Efficiency of Fourstroke Engines", SAE Paper, 520259.
  5. A. Ohata et al., 1985. "Acoustic Control Induction system for 6-Cylinder Engines", JSAE Rev. 8- 15.
  6. D. E. Winterbone, R. J. Pearson, 2000, "Theory of Engine Manifold Design", Professional Engineering Publishing Limited, London and Bury St. Edmunds, UK p. 274.
  7. D. Broome, 1969. "Induction ram, Part Three: Wave Phenomena and the Design of Ram Intake system", Automobile Engineer, pp. 262-267.
  8. S. M. Hanriot et al., "An Experimental and Numerical Study from Pulsating Flow in Intake Manifold", SAE Paper, 2000-01-362.
  9. C. F. Taylor, J. C. Livengood and D. H. Tsai, 1954, "Dynamics in the Inlet System of a Four-Stroke Single-Cylinder Engine", ASME Headquarters, August 9, Paper No. 54-A-188.
  10. 강희영, 2006, 11가변 흡기시스템에 의한 디젤기관의 체적효율 향상에 관한 연구", 한국동력기계공학회지, 제10권 1호, pp. 12-18.
  11. J. W. G. Turner et al., 2004, "New Operation Strategies Afforded by Fully Variable Valve Trains", SAE technical paper senes, 2004-01-1386.
  12. M. A. Mohr, R. Flierl and W. Hannibal, 2004, "Potential of a Mechanical Fully- Variable Valve Lift System for Engine with a Side-Mounted Camshaft", SAE technical paper series, 2004-01-1395.
  13. P. Kreuter et al., 2004, "Comparison of Different Kinematics Solutions for Mechanical Continuously Variable Valve Lift Systems", SAE technical paper series, 2004-01-1396.
  14. J. P. Watson and R. J. Wakeman, 2005, "Simulation of a Pneumatic Valve Actuation System for Internal Combustion Engine", SAE technical paper series, 2005-01-0771.
  15. A. Warburton et al., 2005, "Intelligent Valve Actuation (IVA) System for Gasoline and Diesel Engines", SAE technical paper series, 2005-01-0772.
  16. M. C. Brands, "Helmholtz Tuned Induction System for Turbocharged Diesel Engine", SAE Paper, 790069.
  17. B. Jawad et al., 2003, "Intake Design for Maximum Performance", SAE technical paper series, 2003-01-2277.