Combustion System Optimization of a Gasoline Direct Injection Engine

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Abstract:

With the purpose of optimizing the combustion system of a homogeneous charged gasoline direct injection engine, its working process was simulated with a 3-D CFD software package. The authors investigated the influence of injection timings and combustion chamber shapes on the charge motion, fuel injection and their influence on fuel-air mixture formation. With the comparisons of fuel-air mixture quality and combustion processes between two typical injection timings, the optimal injection strategy was chosen. To further improve the mixture quality, configuration on piston crown was optimized and analysis on mixture formation processes of the new configurations was made. Simulation results indicate that the new configurations have faster fuel evaporation rate and better mixture homogeneity.

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Periodical:

Advanced Materials Research (Volumes 354-355)

Pages:

419-428

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Online since:

October 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] Mike Fry, Jason King, Carl White. A Comparison of Gasoline Direct Injection Systems and Discussion of Development Techniques [C]. SAE Paper 1999-01-0171, (1999).

DOI: 10.4271/1999-01-0171

Google Scholar

[2] Spicher U, Reissing J, Kech J M, et a1. Gasoline Direct Injection(GDI) Engines-Development Potentialities. [C]. SAE Paper 1999-01-2938, (1999).

DOI: 10.4271/1999-01-2938

Google Scholar

[3] Naber J D, Reitz R D. Modeling Engine Spray/Wall Impingement [C]. SAE Paper 880107, (1988).

DOI: 10.4271/880107

Google Scholar

[4] Dukowicz, J K. Quasi-Steady Droplet Change in The Presence of Convection. Informal Report Los Alamos Scientific Laboratory [R]. LA7997-MS. (1979).

DOI: 10.2172/6012968

Google Scholar

[5] Huh K Y, Gosman A D. A Phenomenological Model of Diesel Spray Atomization[C]. Proceedings of the International Conference on Multiphase Flows, Sept. 24-27, 1991, Tsukuba, Japan.

Google Scholar

[6] Tian JP. Research on Combustion System and Spray Characteristics of Direct-Injection Sub-Chamber Gasoline Engines. PhD Dissertation of Dalian Univ. of Tech. 2009. (in Chinese).

Google Scholar

[7] Heywood J. Internal Combustion Engine Fundamentals [M]. McGraw-Hill, New York. (1988).

Google Scholar