Emission Reduction in a GDI Engine with Different Injection Timings – A CFD Investigation

P. Ramesh; E: James Gunasekaran

doi:10.15866/iremos.v7i4.2941

Emission Reduction in a GDI Engine with Different Injection Timings – A CFD Investigation

P. Ramesh^(1*), E: James Gunasekaran⁽²⁾

^(*) Corresponding author

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DOI: https://doi.org/10.15866/iremos.v7i4.2941

Abstract

Spark ignition dominates the personal transportation segment. These engines have been well developed over 100 years. In order to meet the stringent emission norms, the performance of the engines has to be enhanced. In this regard CFD plays an important role in designing a better engine. In this paper the results of a three dimensional reactive flow simulation conducted on a commercial SI engines are presented. The simulations were conducted at an engine speed of 1000rpm with fuel injected directly into the cylinder. Three modes of fuel injections are analyzed. They are during opening of intake valve (case-1), during peak valve lift (case-2) and after the closure of intake valve (case-3). The injected fuel quantity is such that when all the injected fuel evaporates completely it would produce a stoichiometric mixture in the combustion chamber. The early injection (case-1) gives better performance in terms of higher peak pressure, early heat release, better homogeneous mixture and lowest emission compared to the other two cases. Compared with case-1, case-2 have 1.91% less maximum pressure, 4.3% lower CO2, 7.62% higher CO and 64.42% higher NOx. Whereas in case-3, 38.63% less maximum pressure, 34.78% lower CO2, 35.32% higher CO and 56.5% higher NOx.
Copyright © 2014 Praise Worthy Prize - All rights reserved.

Keywords

Trimmed Mesh; Start of Injection; Combustion; GDI

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References

M. Ohsuga, T.Shiraishi, T.Nogi, Y. Nakayama, and Y. Sukegawa, Mixture Preparation for Direct Injection SI Engines, SAE 970542, 1997.

Fu-Quan Zhao, Ming-Chia Lai, and David L. Harrington, A review of mixture preparation and Combustion Control Strategies for Spark – Ignited Direct – Injection Gasoline Engines, SAE 970627, 1997.

G. Karl, R. Kemmler, M.Bargende, and J. Abthoff, Analysis of a direct injected gasoline engine, SAE 970624, 1997.

Jun Harada, Tsutomu Tomita, Hiroyuki Mizumo, Zenichiro Mashiki, and YasushiIto, Development of Direct Injection Gasoline Engine, SAE 970540, 1997.

Spiche, O., Gasoline Direct Injection (GDI) Engines – Development Potentialities, SAE paper 1999-01-2938.

Yamamoto. S., et al., Advanced Emission Control Technology by Utilizing Freedom of Mixing on GDI Engine, SAE peper 200-05-0139.

Zaho, F.F., Harrington. D. L., Lai, M. C., Automotive Gasoline Direct – Injection Engines, SAE R-315, 2002.

John. B.H., Internal Combustion engine Fundamentals, (1998), PP326-330.

Willand W, Engineering Fundamentals of the Internal Combustion Engine, Pulkarabck – Prentice Hall Upper Saddle River, New Jersey 07458.

Yong Yi, Christopper M, Deminco., Numerical investigation of Mixture Preparation in a GDI Engine, SAE2006-01-3375, October 2006.

Kazunari, K. and H. Ando, Diagnostics of Incylinder Flow, Mixing and Combustion in gasoline Engines, Journal of Measurments Science and Technology, 11, R95-R111, 2000.
http://dx.doi.org/10.1088/0957-0233/11/6/202

Yasar, A., B. Sahin, H. Akilli and K. Aydin, Effect of Inlet Port on the Flow in the Cylinder of an Internal Combustion Engine, Proceedings of Institution of Mech. Engg. 220, Part C: J. Mechanical Engineering Science, 2006.
http://dx.doi.org/10.1243/095440605X32129

M. Pontoppidan, G. Gaviani, G. Bella and V. Rocco, Direct Fuel Injection – a Study of Injector Requirements for Different Mixture Preparation Concepts, SAE 970628, 1997.

Zhiyu Han, Rolf D. Reitz, Jailin Yang and Richard W. Anderson, Effect of Injection Timing on Air-Fuel Mixing in a Direct – Injection Spark – Ignition Engine, SAE 970625, 1997.

Sudhakar Das, John Kirwan and Shi-Ing Chang, Spray Pattern Recognition for Multi-Hole Gasoline Direct Injectors using CFD Modelling, SAE2009-01-1488, 2009.

Malaguti, S., Cantore, G., Fontanesi, S., Lupi, R., and Rosetti, A., CFD Investigation of Wall wetting in a GDI Engine Under Lower Temperature Cranking Operations, SAE 2009-01-0704, 2009.

H. F. Zhang, K. Sea and H. Zhao, Combustion and Emission Analysis of the Direct DME Injection Enabled and Controlled Auto-Ignition gasoline Combustion Engine Operation, Volume 107, May 2013, PP 800-814.

Hong Lin, Chia-Fon Lee, Numerical Study on Wall Film Formation and Evaporation, SAE 2014-01-1112, April 2014.

Guy Hoffmann, Bizhan Befrui, Axel Berndorfer, Walter F. Piock and Daniel L. Varble, Fuel system Pressure Increase for Enhanced Performance of GDI Multi-Hole Injection Systems, SAE 2014-01-1209, January 2014.

W T kim, K Y Huh, J W Lee and K Y kang, Numerical Simulation of intake and Compression Flow in a Four – Valve Pent-Roof spark Ignition Engine and Validation with LDV Data, Proc. Instn. Mech. Engrs. Vol 214, Part D, Imech 2000 (D04898).

Sham Tickoo and Vicky raina, CATIA V5R17 for Engineers and Designers, Published by Dream Tech Press.

StarCD, Meshing Tutorials, StarCD Version 4.14, 2010

StarCD, Meshing User Guide, StarCD Version 4.14, 2010

StarCD, User Guide, es-ice Version 4.18, June 2012.

StarCD, Tutorials, es-ice Version 4.18, June 2012.

StarCD, CCM Tutorials, StarCD Version 4.16, 2011.

StarCD, CCM User Guide, StarCD Version 4.18, 2012.

StarCD, Post-Processing User Guide, StarCD Version 4.14, 2010.

StarCD, CCM Tutorials, StarCD Version 4.16, 2011.

StarCD, CCM User Guide, StarCD Version 4.18, 2012.

StarCD, Post-Processing User Guide, StarCD Version 4.14, 2010.

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