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Effects of Injector Spray Layout and Injection Strategy on Gas Mixture Quality of Gasoline Direct Injection Engine
Technical Paper
2015-01-0747
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The improvement of environmental performance by gasoline direct injection (GDI) engine is remarkable. But the gas mixture formation process, which greatly affects the combustion of direct injection spark ignition (DISI) engines, still has a lot of areas left unclear. In this paper, a CFD model of air intake, fuel spray atomization and mixture formation process of a certain GDI engine was developed and experimentally verified for DISI injection study. The effects of injector spray layout and injection strategy on mixture quality of DISI engine were analyzed by respective simulation of three different injectors T1470, T1471, T1472. Results show that the mixture quality can be improved with appropriate injector spray orifices layout. Further simulation analysis show that, the impingement of the fuel spray on the cylinder wall or piston is reduced and the cylinder turbulent kinetic energy is increased by using two-stage injection instead of single fuel injection under condition of full load at low speed. In addition, the concentration of mixture near the spark plug is increased, and the quality of mixture is improved with more appropriate injection timing and injection fuel ratio of the first injection stage and the second stage.
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Du, A., Zhu, Z., Chu, C., and Li, M., "Effects of Injector Spray Layout and Injection Strategy on Gas Mixture Quality of Gasoline Direct Injection Engine," SAE Technical Paper 2015-01-0747, 2015, https://doi.org/10.4271/2015-01-0747.Also In
References
- Ashley , S. Attacking GDI Engine Particulate Emissions Automotive Engineering Magazine Dec. 2014 http://articles.sae.org/13624/
- Kazour , J. , Befrui , B. , Husted , H. , Raney , M. et al. Innovative Sprays and Particulate Reduction with GDi Injectors SAE Technical Paper 2014-01-1441 2014 10.4271/2014-01-1441
- Hoffmann , G. , Befrui , B. , Berndorfer , A. , Piock , W. et al. Fuel System Pressure Increase for Enhanced Performance of GDi Multi-Hole Injection Systems SAE Int. J. Engines 7 1 519 527 2014 10.4271/2014-01-1209
- Fan , Q. and Li , L. Transient Characteristics of Cold Start Emissions from a Two-Stage Direct Injection Gasoline Engines Employing the Total Stoichiometric Ratio and Local Rich Mixture Start-up Strategy SAE Technical Paper 2012-01-1068 2012 10.4271/2012-01-1068
- Bonandrini , G. , Di Gioia , R. , Papaleo , D. , and Venturoli , L. Numerical Study on Multiple Injection Strategies in DISI Engines for Particulate Emission Control SAE Technical Paper 2012-01-0400 10.4271/2012-01-0400
- Liu , Y. , Shen , Y. , You , Y. , and Zhao , F. Numerical Simulation on Spray Atomization and Fuel-Air Mixing Process in a Gasoline Direct Injection Engine SAE Technical Paper 2012-01-0395 2012 10.4271/2012-01-0395
- Dukowicz J K A particle-fluid numerical model for liquid sprays Journal of Computational Physics 1980 35 2 229 253
- Huh , K.Y. , Gosman , A.D A phenomenological model of diesel spray atomization Proceedings of the International Conference on Multiphase Flows. 1991 Tsukuba, Japan
- Dukowicz , J.K. Quasi-steady droplet change in the presence of convection Informal Report Los Alamos Scientific Laboratory. 1979
- Zhou J. Effects of wall models on heat transfer multi-dimensional transient numerical simulation in diesel cylinder Internal Combustion Engine & Power Plant 2009 4 25 28
- Nordin P A. Complex chemistry modeling of diesel spray combustion Chalmers University of Technology 2001
- Mengmeng Li , Aimin Du , Jianmin , Yin , Xuewei Li Simulation Research on the Effect of Injection Strategy on Formation of Mixture of Gasoline Direct Injection Engine Chinese Internal Combustion Engine Engineering. 2013 S1 5 9