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http://dx.doi.org/10.7467/KSAE.2014.22.3.210

Characteristics of the In-cylinder Flow and Fuel Behavior with Respect to Engine Temperature Condition in the MPI Dual Injection Engine  

Lee, Seung Yeob (Department of Mechanical Engineering, Korea University)
Chung, Jin Taek (Department of Mechanical Engineering, Korea University)
Park, Young Joon (Gasoline Engine R&D Team, Hyundai Motor Company)
Yu, Chul Ho (Gasoline Engine R&D Team, Hyundai Motor Company)
Kim, Woo Tae (Gasoline Engine R&D Team, Hyundai Motor Company)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.3, 2014 , pp. 210-219 More about this Journal
Abstract
The MPI dual injection engine can enhance the fuel efficiency and engine power. By using one injector per one intake port, MPI dual injection engine has an excellent fuel atomization and targeting injection. As the basic research for the MPI Dual injection engine design, this research was investigated in order to understand the characteristic of the in-cylinder flow and fuel behavior according to engine temperature condition and the fuel type in the MPI dual injection engines. The 3D unsteady CFD simulation for the MPI Dual injection engine was performed using STAR-CD. The engine operating condition was 2,000 rpm/WOT. The parameters for this study were fuel types, fuel temperatures and wall temperatures. As a result, the intake air amount, evaporated fuel in the cylinder and the fuel film on the wall were presented according to parameters that depend on the fuel properties and engine wall temperature. Also, the results were influenced by in-cylinder flow such as the intake flow, back flow and so on.
Keywords
Dual injection; MPI; CFD; In-cylinder flow; Fuel behavior; Fuel film;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 N. Cho, "Development Status of Direct Injection Gasoline Engines," Auto Journal, KSAE, Vol.25, No.6, pp.7-12, 2003.
2 Y. Kim, S. Jun and S. Rew, "A Study of Engine Control for Minimization of Oil Dilution at TGDI Engine," KSME Annual Spring Conference Proceeding, pp.26-31, 2011.
3 Y. Kim, S. Jun, Y. Kim, S. Rew, D. Lee, K. Choi and S. Park, "Study of PN Reduction to Comply with EURO IV Particle Emission Legislation for 1.6L Gasoline Direct Injection Vehicle," KSAE Annual Conference Proceedings, pp.440-446, 2011.
4 Y. S. Cho, S. W. Lee, I. K. Jang, J. K. Park, Y. B. Yoon, Y. J. Park, H. Kim and B. Na, "Numerical Analysis for Prediction of the Residual Gas Fraction, Volumetric Efficiency and Pumping Loss with Continuous Variable Valve Lift System in an SI Engine," Transactions of KSAE, Vol.18, No.2, pp.7-13, 2010.   과학기술학회마을
5 C. Bae and Y. Jung, "Fuel Economy Improvement of Automotive Engines," Auto Journal, KSAE, Vol.34, No.1, pp.39-46, 2012.
6 F. Q. Zhao, M. C. Lai and D. L. Harrington, "The Spray Characteristics of Automotive Port Fuel Injection-A Critical Review," SAE 950506, 1995.
7 J. N. Kim, H. Y. Kim, S. S. Yoon, S. D. Sa and W. T. Kim, "Effect of Valve Timing and Lift on Flow and Mixing Characteristics of a CAI Engine," Int. J. Automotive Technology, Vol.8, No.6, pp.687-696, 2007.
8 Y. L. Qi, L. C. Dong, H. Liu, P. V. Puzinauskas and K. C. Midkiff, "Optimization of Intake Port Design for SI Engine," Int. J. Automotive Technology, Vol.13, No.6, pp.861-872, 2012.   DOI   ScienceOn
9 R. Meyer and J. B. Heywood, "Effect of Engine and Fuel Variables on Liquid Fuel Transport into the Cylinder in Port-injected SI Engine," SAE 1999-01-0563, 1999.
10 H. Y. Kim, D. J. Lee, B. S. Park and J. T. Chung, "Behavior of an Impinging Droplet on a Solid Surface with a Variation of Liquid Temperature," Transaction of the KSME B, Vol.29, No.3, pp.330-339, 2005.
11 Y. Li, H. Zhao and T. Ma, "Stratification of Fuel for Better Engine Performance," Fuel, Vol.85, Issue 4, pp.465-473, 2005.
12 N. Kim, K. Lee, K. Min, K. Kang, M. Shin and H. Kim, "Study on the Imporvement of Full Load Performance of PFI Engine using Dual PFI Injector and Open Valve Injection Strategy," KSAE Annual Conference Proceedings, pp.87-92, 2011.
13 Y. Woo, C. Bae and T. Lee, "Effects of Port Fuel Injection Characteristics upon HC Emission in SI Engines," Transactions of KSAE, Vol.11, No.2, pp.8-15, 2003.   과학기술학회마을
14 V. Yakhot, S. Tangam, T. B. Gatski, S. A. Orzag and C. G. Speziale, "Development of Turbulence Models for Shear Flows by a Double Expansion Technique," Physics of Fluids, Vol.4, Issue 7, pp.1510-1520, 1992.   DOI
15 R. I. Issa, "Solution of the Implicitly Discrestised Fluid Flow Equations by Operator-splitting," Journal of Computational Physics, Vol.62, Issue 1, pp.40-65, 1985.
16 R. D. Reitz and R. Diwakar, "Effect of Drop Breakup on Fuel Sprays," SAE 860469, 1986.
17 P. Asproulis, High Resolution Numerical Predictions of Hypersonic Flows on Unstructured Meshes, Ph. D. Dissertation, University of London, London, 1994.
18 C. Bai and A. D. Gosman, "Mathematical Modelling of Wall Films Formed by Impinging Sprays," SAE 960626, 1996.