Geometric features of the flame propagation process for an SI engine having dual-ignition system

2002 ◽  
Vol 26 (11) ◽  
pp. 987-1000 ◽  
Author(s):  
Atilla Bilgin
Keyword(s):  
Flame Propagation ◽  
Geometric Features ◽  
Si Engine ◽  
Propagation Process ◽  
Ignition System

Numerical and Experimental Analysis of Ignition and Combustion Stability in EGR Dilute GDI Operation

2014 ◽  
Author(s):  
Riccardo Scarcelli ◽  
Nicholas S. Matthias ◽  
Thomas Wallner
Keyword(s):  
Flame Propagation ◽  
Numerical Results ◽  
Operating Conditions ◽  
Combustion Stability ◽  
Ignition Process ◽  
Ignition System ◽  
Cyclic Variability ◽  
Beneficial Effects ◽  
Engine Testing ◽  
Ignition And Combustion

This paper discusses the characteristics of EGR dilute GDI engines in terms of combustion stability. A combined approach consisting of RANS numerical simulations integrated with experimental engine testing is used to analyze the effect of the ignition source on flame propagation under dilute operating conditions. A programmable spark-based ignition system is compared to a production spark system in terms of cyclic variability and ultimately indicated efficiency. 3D-CFD simulations are carried out for multiple cycles with the goal of establishing correlations between the characteristics of the ignition system and flame propagation as well as cycle-to-cycle variations. Numerical results are compared to engine data in terms of in-cylinder pressure traces. The results show that an improved control over the energy released to the fluid surrounding the spark domain during the ignition process has beneficial effects on combustion stability. This allows extending the dilution tolerance for fuel/air mixtures. Although affected by cyclic variability, numerical results show good qualitative agreement with experimental data. The result is a simple but promising approach for relatively quick assessment of stability improvements from advanced and alternative ignition strategies.

Exploring the lean limit operation and fuel consumption improvement of a homogeneous charge pre-chamber torch ignition system in an SI engine fueled with a gasoline-bioethanol blend

Energy ◽  
2020 ◽  
Vol 197 ◽  
pp. 117300
Author(s):  
Roberto Berlini Rodrigues da Costa ◽  
Fernando Antônio Rodrigues Filho ◽  
Thiago Augusto Araújo Moreira ◽  
José Guilherme Coelho Baêta ◽  
Márcio Expedito Guzzo ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Si Engine ◽  
Ignition System ◽  
Lean Limit ◽  
Fuel Consumption Improvement ◽  
Homogeneous Charge

327 Development of Non-eccentric Rotor IC Engine : Optical Observations of Ignition and Flame Propagation Process

2014 ◽  
Vol 2014.63 (0) ◽  
pp. _327-1_-_327-2_
Author(s):  
Yu SAKAI ◽  
Keisuke TESHIMA ◽  
Hiroyuki FUJII ◽  
Yusaku YAMAMOTO ◽  
Yu SAIKI ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Optical Observations ◽  
Propagation Process ◽  
Ic Engine ◽  
Eccentric Rotor
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